// -- (c) Copyright 2009 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// File name: addr_arbiter_sasd.v
//
// Description: 
//   Hybrid priority + round-robin arbiter.
//   Read & write requests combined (read preferred) at each slot
//   Muxes AR and AW channel payload inputs based on arbitration results.
//-----------------------------------------------------------------------------
//
// Structure:
//    addr_arbiter_sasd
//      mux_enc
//-----------------------------------------------------------------------------

`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_addr_arbiter_sasd #
  (
   parameter         C_FAMILY                         = "none", 
   parameter integer C_NUM_S                = 1, 
   parameter integer C_NUM_S_LOG                = 1, 
   parameter integer C_AMESG_WIDTH                 = 1, 
   parameter         C_GRANT_ENC        = 0,
   parameter [C_NUM_S*32-1:0] C_ARB_PRIORITY             = {C_NUM_S{32'h00000000}}
                       // Arbitration priority among each SI slot. 
                       // Higher values indicate higher priority.
                       // Format: C_NUM_SLAVE_SLOTS{Bit32};
                       // Range: 'h0-'hF.
   )
  (
   // Global Signals
   input  wire                                      ACLK,
   input  wire                                      ARESET,
   // Slave Ports
   input  wire [C_NUM_S*C_AMESG_WIDTH-1:0]  S_AWMESG,
   input  wire [C_NUM_S*C_AMESG_WIDTH-1:0]  S_ARMESG,
   input  wire [C_NUM_S-1:0]                S_AWVALID,
   output wire [C_NUM_S-1:0]                S_AWREADY,
   input  wire [C_NUM_S-1:0]                S_ARVALID,
   output wire [C_NUM_S-1:0]                S_ARREADY,
   // Master Ports
   output wire [C_AMESG_WIDTH-1:0]          M_AMESG,
   output wire [C_NUM_S_LOG-1:0]            M_GRANT_ENC,
   output wire [C_NUM_S-1:0]                M_GRANT_HOT,
   output wire                              M_GRANT_RNW,
   output wire                              M_GRANT_ANY,
   output wire                              M_AWVALID,
   input  wire                              M_AWREADY,
   output wire                              M_ARVALID,
   input  wire                              M_ARREADY
   );
   
  // Generates a mask for all input slots that are priority based
  function [C_NUM_S-1:0] f_prio_mask
    (
      input integer null_arg
    );
    reg   [C_NUM_S-1:0]            mask;
    integer                        i;    
    begin
      mask = 0;    
      for (i=0; i < C_NUM_S; i=i+1) begin
        mask[i] = (C_ARB_PRIORITY[i*32+:32] != 0);
      end 
      f_prio_mask = mask;
    end   
  endfunction
  
  // Convert 16-bit one-hot to 4-bit binary
  function [3:0] f_hot2enc
    (
      input [15:0]  one_hot
    );
    begin
      f_hot2enc[0] = |(one_hot & 16'b1010101010101010);
      f_hot2enc[1] = |(one_hot & 16'b1100110011001100);
      f_hot2enc[2] = |(one_hot & 16'b1111000011110000);
      f_hot2enc[3] = |(one_hot & 16'b1111111100000000);
    end
  endfunction

  localparam [C_NUM_S-1:0] P_PRIO_MASK = f_prio_mask(0);

  reg                     m_valid_i = 1'b0;
  reg [C_NUM_S-1:0]       s_ready_i = 0;
  reg [C_NUM_S-1:0]       s_awvalid_reg = 0;
  reg [C_NUM_S-1:0]       s_arvalid_reg = 0;
  wire [15:0]             s_avalid;
  wire                    m_aready;
  wire [C_NUM_S-1:0]      rnw;
  reg                     grant_rnw;
  reg [C_NUM_S_LOG-1:0]   m_grant_enc_i;
  reg [C_NUM_S-1:0]       m_grant_hot_i; 
  reg [C_NUM_S-1:0]       last_rr_hot;
  reg                     any_grant;
  reg                     any_prio;
  reg [C_NUM_S-1:0]       which_prio_hot;
  reg [C_NUM_S_LOG-1:0]   which_prio_enc;          
  reg [4:0]               current_highest;
  reg [15:0]              next_prio_hot;
  reg [C_NUM_S_LOG-1:0]   next_prio_enc;    
  reg                     found_prio;
  wire [C_NUM_S-1:0]      valid_rr;
  reg [15:0]              next_rr_hot;
  reg [C_NUM_S_LOG-1:0]   next_rr_enc;    
  reg [C_NUM_S*C_NUM_S-1:0] carry_rr;
  reg [C_NUM_S*C_NUM_S-1:0] mask_rr;
  reg                     found_rr;
  wire [C_NUM_S-1:0]      next_hot;
  wire [C_NUM_S_LOG-1:0]  next_enc;    
  integer                 i;
  wire  [C_AMESG_WIDTH-1:0] amesg_mux;
  reg   [C_AMESG_WIDTH-1:0] m_amesg_i;
  wire [C_NUM_S*C_AMESG_WIDTH-1:0] s_amesg;
  genvar                  gen_si;

  always @(posedge ACLK) begin
    if (ARESET) begin
      s_awvalid_reg <= 0;
      s_arvalid_reg <= 0;
    end else if (|s_ready_i) begin
      s_awvalid_reg <= 0;
      s_arvalid_reg <= 0;
    end else begin
      s_arvalid_reg <= S_ARVALID & ~s_awvalid_reg;
      s_awvalid_reg <= S_AWVALID & ~s_arvalid_reg & (~S_ARVALID | s_awvalid_reg);
    end
  end
  
  assign s_avalid = S_AWVALID | S_ARVALID;
  assign M_AWVALID = m_valid_i & ~grant_rnw;
  assign M_ARVALID = m_valid_i & grant_rnw;
  assign S_AWREADY = s_ready_i & {C_NUM_S{~grant_rnw}};
  assign S_ARREADY = s_ready_i & {C_NUM_S{grant_rnw}};
  assign M_GRANT_ENC = C_GRANT_ENC ? m_grant_enc_i : 0;
  assign M_GRANT_HOT = m_grant_hot_i;
  assign M_GRANT_RNW = grant_rnw;
  assign rnw = S_ARVALID & ~s_awvalid_reg;
  assign M_AMESG = m_amesg_i;
  assign m_aready = grant_rnw ? M_ARREADY : M_AWREADY;
  
  generate
    for (gen_si=0; gen_si<C_NUM_S; gen_si=gen_si+1) begin : gen_mesg_mux
      assign s_amesg[C_AMESG_WIDTH*gen_si +: C_AMESG_WIDTH] = rnw[gen_si] ? S_ARMESG[C_AMESG_WIDTH*gen_si +: C_AMESG_WIDTH] : S_AWMESG[C_AMESG_WIDTH*gen_si +: C_AMESG_WIDTH];
    end  // gen_mesg_mux
         
    if (C_NUM_S>1) begin : gen_arbiter
    
      /////////////////////////////////////////////////////////////////////////////
      // Grant a new request when there is none still pending.
      // If no qualified requests found, de-assert M_VALID.
      /////////////////////////////////////////////////////////////////////////////
      
      assign M_GRANT_ANY = any_grant;
      assign next_hot = found_prio ? next_prio_hot : next_rr_hot;
      assign next_enc = found_prio ? next_prio_enc : next_rr_enc;
      
      always @(posedge ACLK) begin
        if (ARESET) begin
          m_valid_i <= 0;
          s_ready_i <= 0;
          m_grant_hot_i <= 0;
          m_grant_enc_i <= 0;
          any_grant <= 1'b0;
          last_rr_hot <= {1'b1, {C_NUM_S-1{1'b0}}};
          grant_rnw <= 1'b0;
        end else begin
          s_ready_i <= 0;
          if (m_valid_i) begin
            // Stall 1 cycle after each master-side completion.
            if (m_aready) begin  // Master-side completion
              m_valid_i <= 1'b0;
              m_grant_hot_i <= 0;
              any_grant <= 1'b0;
            end
          end else if (any_grant) begin
            m_valid_i <= 1'b1;
            s_ready_i <= m_grant_hot_i;  // Assert S_AW/READY for 1 cycle to complete SI address transfer
          end else begin
            if (found_prio | found_rr) begin
              m_grant_hot_i <= next_hot;
              m_grant_enc_i <= next_enc;
              any_grant <= 1'b1;
              grant_rnw <= |(rnw & next_hot);
              if (~found_prio) begin
                last_rr_hot <= next_rr_hot;
              end
            end
          end
        end
      end
    
      /////////////////////////////////////////////////////////////////////////////
      // Fixed Priority arbiter
      // Selects next request to grant from among inputs with PRIO > 0, if any.
      /////////////////////////////////////////////////////////////////////////////
      
      always @ * begin : ALG_PRIO
        integer ip;
        any_prio = 1'b0;
        which_prio_hot = 0;        
        which_prio_enc = 0;    
        current_highest = 0;    
        for (ip=0; ip < C_NUM_S; ip=ip+1) begin
          if (P_PRIO_MASK[ip] & ({1'b0, C_ARB_PRIORITY[ip*32+:4]} > current_highest)) begin
            if (s_avalid[ip]) begin
              current_highest[0+:4] = C_ARB_PRIORITY[ip*32+:4];
              any_prio = 1'b1;
              which_prio_hot = 1'b1 << ip;
              which_prio_enc = ip;
            end
          end   
        end
        found_prio = any_prio;
        next_prio_hot = which_prio_hot;
        next_prio_enc = which_prio_enc;
      end
     
      /////////////////////////////////////////////////////////////////////////////
      // Round-robin arbiter
      // Selects next request to grant from among inputs with PRIO = 0, if any.
      /////////////////////////////////////////////////////////////////////////////
      
      assign valid_rr = ~P_PRIO_MASK & s_avalid;
      
      always @ * begin : ALG_RR
        integer ir, jr, nr;
        next_rr_hot = 0;
        for (ir=0;ir<C_NUM_S;ir=ir+1) begin
          nr = (ir>0) ? (ir-1) : (C_NUM_S-1);
          carry_rr[ir*C_NUM_S] = last_rr_hot[nr];
          mask_rr[ir*C_NUM_S] = ~valid_rr[nr];
          for (jr=1;jr<C_NUM_S;jr=jr+1) begin
            nr = (ir-jr > 0) ? (ir-jr-1) : (C_NUM_S+ir-jr-1);
            carry_rr[ir*C_NUM_S+jr] = carry_rr[ir*C_NUM_S+jr-1] | (last_rr_hot[nr] & mask_rr[ir*C_NUM_S+jr-1]);
            if (jr < C_NUM_S-1) begin
              mask_rr[ir*C_NUM_S+jr] = mask_rr[ir*C_NUM_S+jr-1] & ~valid_rr[nr];
            end
          end   
          next_rr_hot[ir] = valid_rr[ir] & carry_rr[(ir+1)*C_NUM_S-1];
        end
        next_rr_enc = f_hot2enc(next_rr_hot);
        found_rr = |(next_rr_hot);
      end
  
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      ("rtl"),
         .C_RATIO       (C_NUM_S),
         .C_SEL_WIDTH   (C_NUM_S_LOG),
         .C_DATA_WIDTH  (C_AMESG_WIDTH)
        ) si_amesg_mux_inst 
        (
         .S   (next_enc),
         .A   (s_amesg),
         .O   (amesg_mux),
         .OE  (1'b1)
        ); 
        
      always @(posedge ACLK) begin
        if (ARESET) begin
          m_amesg_i <= 0;
        end else if (~any_grant) begin
          m_amesg_i <= amesg_mux;
        end
      end
    
    end else begin : gen_no_arbiter
      
      assign M_GRANT_ANY = m_grant_hot_i;

      always @ (posedge ACLK) begin
        if (ARESET) begin
          m_valid_i <= 1'b0;
          s_ready_i <= 1'b0;
          m_grant_enc_i <= 0;
          m_grant_hot_i <= 1'b0;
          grant_rnw <= 1'b0;
        end else begin
          s_ready_i <= 1'b0;
          if (m_valid_i) begin
            if (m_aready) begin
              m_valid_i <= 1'b0;
              m_grant_hot_i <= 1'b0;
            end
          end else if (m_grant_hot_i) begin
            m_valid_i <= 1'b1;
            s_ready_i[0] <= 1'b1;  // Assert S_AW/READY for 1 cycle to complete SI address transfer
          end else if (s_avalid[0]) begin
            m_grant_hot_i <= 1'b1;
            grant_rnw <= rnw[0];
          end
        end
      end
      
      always @ (posedge ACLK) begin
        if (ARESET) begin
          m_amesg_i <= 0;
        end else if (~m_grant_hot_i) begin
          m_amesg_i <= s_amesg;
        end
      end
    
    end  // gen_arbiter
  endgenerate
endmodule

`default_nettype wire


// -- (c) Copyright 2009 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// File name: addr_arbiter.v
//
// Description: 
//   Instantiates generic priority encoder.
//   Each request is qualified if its target has not reached its issuing limit.
//   Muxes mesg and target inputs based on arbitration results.
//-----------------------------------------------------------------------------
//
// Structure:
//    addr_arbiter
//      mux_enc
//-----------------------------------------------------------------------------

`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_addr_arbiter #
  (
   parameter         C_FAMILY                         = "none", 
   parameter integer C_NUM_S                = 1, 
   parameter integer C_NUM_S_LOG                = 1, 
   parameter integer C_NUM_M               = 1, 
   parameter integer C_MESG_WIDTH                 = 1, 
   parameter [C_NUM_S*32-1:0] C_ARB_PRIORITY             = {C_NUM_S{32'h00000000}}
                       // Arbitration priority among each SI slot. 
                       // Higher values indicate higher priority.
                       // Format: C_NUM_SLAVE_SLOTS{Bit32};
                       // Range: 'h0-'hF.
   )
  (
   // Global Signals
   input  wire                                      ACLK,
   input  wire                                      ARESET,
   // Slave Ports
   input  wire [C_NUM_S*C_MESG_WIDTH-1:0]  S_MESG,
   input  wire [C_NUM_S*C_NUM_M-1:0]                S_TARGET_HOT,
   input  wire [C_NUM_S-1:0]                S_VALID,
   input  wire [C_NUM_S-1:0]                S_VALID_QUAL,
   output wire [C_NUM_S-1:0]                S_READY,
   // Master Ports
   output wire [C_MESG_WIDTH-1:0]                    M_MESG,
   output wire [C_NUM_M-1:0]                           M_TARGET_HOT,
   output wire [C_NUM_S_LOG-1:0]                      M_GRANT_ENC,
   output wire                                        M_VALID,
   input  wire                                        M_READY,
   // Sideband input
   input  wire [C_NUM_M-1:0]                ISSUING_LIMIT
   );
   
  // Generates a mask for all input slots that are priority based
  function [C_NUM_S-1:0] f_prio_mask
    (
      input integer null_arg
    );
    reg   [C_NUM_S-1:0]            mask;
    integer                        i;    
    begin
      mask = 0;    
      for (i=0; i < C_NUM_S; i=i+1) begin
        mask[i] = (C_ARB_PRIORITY[i*32+:32] != 0);
      end 
      f_prio_mask = mask;
    end   
  endfunction
  
  // Convert 16-bit one-hot to 4-bit binary
  function [3:0] f_hot2enc
    (
      input [15:0]  one_hot
    );
    begin
      f_hot2enc[0] = |(one_hot & 16'b1010101010101010);
      f_hot2enc[1] = |(one_hot & 16'b1100110011001100);
      f_hot2enc[2] = |(one_hot & 16'b1111000011110000);
      f_hot2enc[3] = |(one_hot & 16'b1111111100000000);
    end
  endfunction

  localparam [C_NUM_S-1:0] P_PRIO_MASK = f_prio_mask(0);

  reg                     m_valid_i = 1'b0;
  reg [C_NUM_S-1:0]       s_ready_i = 0;
  reg [C_NUM_S-1:0]       qual_reg;
  reg [C_NUM_S-1:0]       grant_hot; 
  reg [C_NUM_S-1:0]       last_rr_hot;
  reg                     any_grant;
  reg                     any_prio;
  reg                     found_prio;
  reg [C_NUM_S-1:0]       which_prio_hot;
  reg [C_NUM_S-1:0]       next_prio_hot;
  reg [C_NUM_S_LOG-1:0]   which_prio_enc;          
  reg [C_NUM_S_LOG-1:0]   next_prio_enc;    
  reg [4:0]               current_highest;
  wire [C_NUM_S-1:0]      valid_rr;
  reg [15:0]              next_rr_hot;
  reg [C_NUM_S_LOG-1:0]   next_rr_enc;    
  reg [C_NUM_S*C_NUM_S-1:0] carry_rr;
  reg [C_NUM_S*C_NUM_S-1:0] mask_rr;
  reg                     found_rr;
  wire [C_NUM_S-1:0]      next_hot;
  wire [C_NUM_S_LOG-1:0]  next_enc;    
  reg                     prio_stall;
  integer                 i;
  wire [C_NUM_S-1:0]      valid_qual_i;
  reg  [C_NUM_S_LOG-1:0]  m_grant_enc_i;
  reg  [C_NUM_M-1:0]      m_target_hot_i;
  wire [C_NUM_M-1:0]      m_target_hot_mux;
  reg  [C_MESG_WIDTH-1:0] m_mesg_i;
  wire [C_MESG_WIDTH-1:0] m_mesg_mux;
  genvar                  gen_si;

  assign M_VALID = m_valid_i;
  assign S_READY = s_ready_i;
  assign M_GRANT_ENC = m_grant_enc_i;
  assign M_MESG = m_mesg_i;
  assign M_TARGET_HOT = m_target_hot_i;
  
  generate
    if (C_NUM_S>1) begin : gen_arbiter
      
      always @(posedge ACLK) begin
        if (ARESET) begin
          qual_reg <= 0;
        end else begin 
          qual_reg <= valid_qual_i | ~S_VALID; // Don't disqualify when bus not VALID (valid_qual_i would be garbage)
        end
      end
    
      for (gen_si=0; gen_si<C_NUM_S; gen_si=gen_si+1) begin : gen_req_qual
        assign valid_qual_i[gen_si] = S_VALID_QUAL[gen_si] & (|(S_TARGET_HOT[gen_si*C_NUM_M+:C_NUM_M] & ~ISSUING_LIMIT));
      end
    
      /////////////////////////////////////////////////////////////////////////////
      // Grant a new request when there is none still pending.
      // If no qualified requests found, de-assert M_VALID.
      /////////////////////////////////////////////////////////////////////////////
      
      assign next_hot = found_prio ? next_prio_hot : next_rr_hot;
      assign next_enc = found_prio ? next_prio_enc : next_rr_enc;
      
      always @(posedge ACLK) begin
        if (ARESET) begin
          m_valid_i <= 0;
          s_ready_i <= 0;
          grant_hot <= 0;
          any_grant <= 1'b0;
          m_grant_enc_i <= 0;
          last_rr_hot <= {1'b1, {C_NUM_S-1{1'b0}}};
          m_target_hot_i <= 0;
        end else begin
          s_ready_i <= 0;
          if (m_valid_i) begin
            // Stall 1 cycle after each master-side completion.
            if (M_READY) begin  // Master-side completion
              m_valid_i <= 1'b0;
              grant_hot <= 0;
              any_grant <= 1'b0;
            end
          end else if (any_grant) begin
            m_valid_i <= 1'b1;
            s_ready_i <= grant_hot;  // Assert S_AW/READY for 1 cycle to complete SI address transfer (regardless of M_AREADY)
          end else begin
            if ((found_prio | found_rr) & ~prio_stall) begin
              // Waste 1 cycle and re-arbitrate if target of highest prio hit issuing limit in previous cycle (valid_qual_i).
              if (|(next_hot & valid_qual_i)) begin  
                grant_hot <= next_hot;
                m_grant_enc_i <= next_enc;
                any_grant <= 1'b1;
                if (~found_prio) begin
                  last_rr_hot <= next_rr_hot;
                end
                m_target_hot_i <= m_target_hot_mux;
              end
            end
          end
        end
      end
    
      /////////////////////////////////////////////////////////////////////////////
      // Fixed Priority arbiter
      // Selects next request to grant from among inputs with PRIO > 0, if any.
      /////////////////////////////////////////////////////////////////////////////
          
      always @ * begin : ALG_PRIO
        integer ip;
        any_prio = 1'b0;
        prio_stall = 1'b0;
        which_prio_hot = 0;        
        which_prio_enc = 0;    
        current_highest = 0;    
        for (ip=0; ip < C_NUM_S; ip=ip+1) begin
          // Disqualify slot if target hit issuing limit (pass to lower prio slot).
          if (P_PRIO_MASK[ip] & S_VALID[ip] & qual_reg[ip]) begin
            if ({1'b0, C_ARB_PRIORITY[ip*32+:4]} > current_highest) begin
              current_highest[0+:4] = C_ARB_PRIORITY[ip*32+:4];
              // Stall 1 cycle when highest prio is recovering from SI-side handshake.
              // (Do not allow lower-prio slot to win arbitration.)
              if (s_ready_i[ip]) begin
                any_prio = 1'b0;
                prio_stall = 1'b1;
                which_prio_hot = 0;
                which_prio_enc = 0;
              end else begin
                any_prio = 1'b1;
                which_prio_hot = 1'b1 << ip;
                which_prio_enc = ip;
              end
            end
          end   
        end
        found_prio = any_prio;
        next_prio_hot = which_prio_hot;
        next_prio_enc = which_prio_enc;
      end
     
      /////////////////////////////////////////////////////////////////////////////
      // Round-robin arbiter
      // Selects next request to grant from among inputs with PRIO = 0, if any.
      /////////////////////////////////////////////////////////////////////////////
      
      // Disqualify slot if target hit issuing limit 2 or more cycles earlier (pass to next RR slot).
      // Disqualify for 1 cycle a slot that is recovering from SI-side handshake (s_ready_i),
      //   and allow arbitration to pass to any other RR requester.
      assign valid_rr = ~P_PRIO_MASK & S_VALID & ~s_ready_i & qual_reg;
      
      always @ * begin : ALG_RR
        integer ir, jr, nr;
        next_rr_hot = 0;
        for (ir=0;ir<C_NUM_S;ir=ir+1) begin
          nr = (ir>0) ? (ir-1) : (C_NUM_S-1);
          carry_rr[ir*C_NUM_S] = last_rr_hot[nr];
          mask_rr[ir*C_NUM_S] = ~valid_rr[nr];
          for (jr=1;jr<C_NUM_S;jr=jr+1) begin
            nr = (ir-jr > 0) ? (ir-jr-1) : (C_NUM_S+ir-jr-1);
            carry_rr[ir*C_NUM_S+jr] = carry_rr[ir*C_NUM_S+jr-1] | (last_rr_hot[nr] & mask_rr[ir*C_NUM_S+jr-1]);
            if (jr < C_NUM_S-1) begin
              mask_rr[ir*C_NUM_S+jr] = mask_rr[ir*C_NUM_S+jr-1] & ~valid_rr[nr];
            end
          end   
          next_rr_hot[ir] = valid_rr[ir] & carry_rr[(ir+1)*C_NUM_S-1];
        end
        next_rr_enc = f_hot2enc(next_rr_hot);
        found_rr = |(next_rr_hot);
      end
  
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      ("rtl"),
         .C_RATIO       (C_NUM_S),
         .C_SEL_WIDTH   (C_NUM_S_LOG),
         .C_DATA_WIDTH  (C_MESG_WIDTH)
        ) mux_mesg 
        (
         .S   (m_grant_enc_i),
         .A   (S_MESG),
         .O   (m_mesg_mux),
         .OE  (1'b1)
        ); 
        
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      ("rtl"),
         .C_RATIO       (C_NUM_S),
         .C_SEL_WIDTH   (C_NUM_S_LOG),
         .C_DATA_WIDTH  (C_NUM_M)
        ) si_amesg_mux_inst 
        (
         .S   (next_enc),
         .A   (S_TARGET_HOT),
         .O   (m_target_hot_mux),
         .OE  (1'b1)
        ); 
        
      always @(posedge ACLK) begin
        if (ARESET) begin
          m_mesg_i <= 0;
        end else if (~m_valid_i) begin
          m_mesg_i <= m_mesg_mux;
        end
      end
    
    end else begin : gen_no_arbiter
      
      assign valid_qual_i = S_VALID_QUAL & |(S_TARGET_HOT & ~ISSUING_LIMIT);
      
      always @ (posedge ACLK) begin
        if (ARESET) begin
          m_valid_i <= 1'b0;
          s_ready_i <= 1'b0;
          m_grant_enc_i <= 0;
        end else begin
          s_ready_i <= 1'b0;
          if (m_valid_i) begin
            if (M_READY) begin
              m_valid_i <= 1'b0;
            end
          end else if (S_VALID[0] & valid_qual_i[0] & ~s_ready_i) begin
            m_valid_i <= 1'b1;
            s_ready_i <= 1'b1;
            m_target_hot_i <= S_TARGET_HOT;
          end
        end
      end
      always @(posedge ACLK) begin
        if (ARESET) begin
          m_mesg_i <= 0;
        end else if (~m_valid_i) begin
          m_mesg_i <= S_MESG;
        end
      end
      
      
    end  // gen_arbiter
  endgenerate
endmodule

`default_nettype wire


// -- (c) Copyright 2010 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// Description: Addr Decoder
// Each received address is compared to base and high address pairs for each 
//   of a set of decode targets. 
// The matching target's index (if any) is output combinatorially.
// If the decode is successful (matches any target), the MATCH output is asserted.
// For each target, a set of alternative address ranges may be specified.
// The base and high address pairs are formatted as a pair of 2-dimensional arrays,
//   alternative address ranges iterate within each target.
// The alternative range which matches the address is also output as REGION.
//
// Verilog-standard:  Verilog 2001
//--------------------------------------------------------------------------
//
// Structure:
//   addr_decoder
//      comparator_static
//
//--------------------------------------------------------------------------
`timescale 1ps/1ps

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_addr_decoder #
  (
   parameter         C_FAMILY          = "none",
   parameter integer C_NUM_TARGETS     = 2,  // Number of decode targets = [1:16]
   parameter integer C_NUM_TARGETS_LOG = 1,  // Log2(C_NUM_TARGETS)
   parameter integer C_NUM_RANGES      = 1, // Number of alternative ranges that
                                             //    can match each target [1:16]
   parameter integer C_ADDR_WIDTH      = 32, // Width of decoder operand and of
                                             //   each base and high address [2:64]
   parameter integer C_TARGET_ENC      = 0,  // Enable encoded target output
   parameter integer C_TARGET_HOT      = 1,  // Enable 1-hot target output
   parameter integer C_REGION_ENC      = 0,   // Enable REGION output
   parameter [C_NUM_TARGETS*C_NUM_RANGES*64-1:0] C_BASE_ADDR = {C_NUM_TARGETS*C_NUM_RANGES*64{1'b1}}, 
   parameter [C_NUM_TARGETS*C_NUM_RANGES*64-1:0] C_HIGH_ADDR = {C_NUM_TARGETS*C_NUM_RANGES*64{1'b0}}, 
   parameter [C_NUM_TARGETS:0]    C_TARGET_QUAL                 = {C_NUM_TARGETS{1'b1}},
                       // Indicates whether each target has connectivity.
                       // Format: C_NUM_TARGETS{Bit1}.
   parameter integer   C_RESOLUTION                 = 0,
                       // Number of low-order ADDR bits that can be ignored when decoding.
   parameter integer   C_COMPARATOR_THRESHOLD       = 6
                       // Number of decoded ADDR bits above which will implement comparator_static.
   )
  (
   input  wire [C_ADDR_WIDTH-1:0]      ADDR,        // Decoder input operand
   output wire [C_NUM_TARGETS-1:0]     TARGET_HOT,  // Target matching address (1-hot)
   output wire [C_NUM_TARGETS_LOG-1:0] TARGET_ENC,  // Target matching address (encoded)
   output wire                         MATCH,       // Decode successful
   output wire [3:0]                   REGION      // Range within target matching address (encoded)
   );
  
  
  /////////////////////////////////////////////////////////////////////////////
  // Variables for generating parameter controlled instances.
  genvar target_cnt;
  genvar region_cnt;
  
  
  /////////////////////////////////////////////////////////////////////////////
  // Function to detect addrs is in the addressable range.
  // Only compare 4KB page address (ignore low-order 12 bits)
  function  decode_address;
    input [C_ADDR_WIDTH-1:0] base, high, addr;
    reg   [C_ADDR_WIDTH-C_RESOLUTION-1:0] mask;
    reg   [C_ADDR_WIDTH-C_RESOLUTION-1:0] addr_page;
    reg   [C_ADDR_WIDTH-C_RESOLUTION-1:0] base_page;
    reg   [C_ADDR_WIDTH-C_RESOLUTION-1:0] high_page;
  begin
    addr_page = addr[C_RESOLUTION+:C_ADDR_WIDTH-C_RESOLUTION];
    base_page = base[C_RESOLUTION+:C_ADDR_WIDTH-C_RESOLUTION];
    high_page = high[C_RESOLUTION+:C_ADDR_WIDTH-C_RESOLUTION];
    if (base[C_ADDR_WIDTH-1] & ~high[C_ADDR_WIDTH-1]) begin
      decode_address = 1'b0;
    end else begin
      mask  = base_page ^ high_page;
      if ( (base_page & ~mask) == (addr_page & ~mask) ) begin
        decode_address = 1'b1;
      end else begin
        decode_address = 1'b0;
      end
    end
  end
  endfunction
  
  // Generates a binary coded from onehotone encoded
  function [3:0] f_hot2enc
    (
      input [15:0]  one_hot
    );
    begin
      f_hot2enc[0] = |(one_hot & 16'b1010101010101010);
      f_hot2enc[1] = |(one_hot & 16'b1100110011001100);
      f_hot2enc[2] = |(one_hot & 16'b1111000011110000);
      f_hot2enc[3] = |(one_hot & 16'b1111111100000000);
    end
  endfunction

  /////////////////////////////////////////////////////////////////////////////
  // Internal signals
  wire [C_NUM_TARGETS-1:0]              TARGET_HOT_I;     // Target matching address (1-hot).
  wire [C_NUM_TARGETS*C_NUM_RANGES-1:0] ADDRESS_HIT;      // For address hit (1-hot).
  wire [C_NUM_TARGETS*C_NUM_RANGES-1:0] ADDRESS_HIT_REG;  // For address hit (1-hot).
  wire [C_NUM_RANGES-1:0]               REGION_HOT;       // Reginon matching address (1-hot).
  wire [3:0]                            TARGET_ENC_I;     // Internal version of encoded hit. 
  /////////////////////////////////////////////////////////////////////////////
  // Generate detection per region per target.
  generate
    for (target_cnt = 0; target_cnt < C_NUM_TARGETS; target_cnt = target_cnt + 1) begin : gen_target
      for (region_cnt = 0; region_cnt < C_NUM_RANGES; region_cnt = region_cnt + 1) begin : gen_region
        // Detect if this is an address hit (including used region decoding).
        if ((C_ADDR_WIDTH - C_RESOLUTION) > C_COMPARATOR_THRESHOLD) begin : gen_comparator_static
          if (C_TARGET_QUAL[target_cnt] &&
              ((C_BASE_ADDR[(target_cnt*C_NUM_RANGES+region_cnt)*64 +: C_ADDR_WIDTH] == 0) ||
               (C_HIGH_ADDR[(target_cnt*C_NUM_RANGES+region_cnt)*64 +: C_ADDR_WIDTH] != 0))) begin : gen_addr_range
            generic_baseblocks_v2_1_0_comparator_static #
            (
            .C_FAMILY("rtl"),
            .C_VALUE(C_BASE_ADDR[(target_cnt*C_NUM_RANGES+region_cnt)*64+C_RESOLUTION +: C_ADDR_WIDTH-C_RESOLUTION]),
            .C_DATA_WIDTH(C_ADDR_WIDTH-C_RESOLUTION)
            ) addr_decode_comparator
            (
            .CIN(1'b1),
            .A(ADDR[C_RESOLUTION +: C_ADDR_WIDTH-C_RESOLUTION] &
              ~(C_BASE_ADDR[(target_cnt*C_NUM_RANGES+region_cnt)*64+C_RESOLUTION +: C_ADDR_WIDTH-C_RESOLUTION] ^
                C_HIGH_ADDR[(target_cnt*C_NUM_RANGES+region_cnt)*64+C_RESOLUTION +: C_ADDR_WIDTH-C_RESOLUTION])),
            .COUT(ADDRESS_HIT[target_cnt*C_NUM_RANGES + region_cnt])
            );
          end else begin : gen_null_range
            assign ADDRESS_HIT[target_cnt*C_NUM_RANGES + region_cnt] = 1'b0;
          end
        end else begin : gen_no_comparator_static
          assign ADDRESS_HIT[target_cnt*C_NUM_RANGES + region_cnt] = C_TARGET_QUAL[target_cnt] ? 
                                    decode_address(
                                      C_BASE_ADDR[(target_cnt*C_NUM_RANGES+region_cnt)*64 +: C_ADDR_WIDTH],
                                      C_HIGH_ADDR[(target_cnt*C_NUM_RANGES+region_cnt)*64 +: C_ADDR_WIDTH],
                                      ADDR)
                                    : 1'b0;
        end  // gen_comparator_static
        assign ADDRESS_HIT_REG[region_cnt*C_NUM_TARGETS+target_cnt] = ADDRESS_HIT[target_cnt*C_NUM_RANGES + region_cnt];
      end  // gen_region
      
      // All regions are non-overlapping
      // => Or all the region detections for this target to determine if it is a hit.
      assign TARGET_HOT_I[target_cnt]  = | ADDRESS_HIT[target_cnt*C_NUM_RANGES +: C_NUM_RANGES];
    end  // gen_target
    
    for (region_cnt = 0; region_cnt < C_NUM_RANGES; region_cnt = region_cnt + 1) begin : gen_region_or
      assign REGION_HOT[region_cnt] = | ADDRESS_HIT_REG[region_cnt*C_NUM_TARGETS +: C_NUM_TARGETS];
    end  // gen_region_or
  endgenerate
  
  
  /////////////////////////////////////////////////////////////////////////////
  // All regions are non-overlapping
  // => Or all the target hit detections if it is a match.
  assign MATCH = | TARGET_HOT_I;
  
  
  /////////////////////////////////////////////////////////////////////////////
  // Assign conditional onehot target output signal.
  generate
    if (C_TARGET_HOT == 1) begin : USE_TARGET_ONEHOT
      assign TARGET_HOT = MATCH ? TARGET_HOT_I : 1;
    end else begin : NO_TARGET_ONEHOT
      assign TARGET_HOT = {C_NUM_TARGETS{1'b0}};
    end
  endgenerate
  
  
  /////////////////////////////////////////////////////////////////////////////
  // Assign conditional encoded target output signal.
  generate
    if (C_TARGET_ENC == 1) begin : USE_TARGET_ENCODED
      assign TARGET_ENC_I = f_hot2enc(TARGET_HOT_I);
      assign TARGET_ENC   = TARGET_ENC_I[C_NUM_TARGETS_LOG-1:0];
    end else begin : NO_TARGET_ENCODED
      assign TARGET_ENC = {C_NUM_TARGETS_LOG{1'b0}};
    end
  endgenerate
  
  
  /////////////////////////////////////////////////////////////////////////////
  // Assign conditional encoded region output signal.
  generate
    if (C_TARGET_ENC == 1) begin : USE_REGION_ENCODED
      assign REGION = f_hot2enc(REGION_HOT);
    end else begin : NO_REGION_ENCODED
      assign REGION = 4'b0;
    end
  endgenerate
  
  
endmodule


// -- (c) Copyright 2010 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// Round-Robin Arbiter for R and B channel responses
// Verilog-standard:  Verilog 2001
//--------------------------------------------------------------------------
//
// Structure:
//    arbiter_resp
//--------------------------------------------------------------------------
`timescale 1ps/1ps

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_arbiter_resp #
  (
   parameter         C_FAMILY       = "none",
   parameter integer C_NUM_S        = 4,      // Number of requesting Slave ports = [2:16]
   parameter integer C_NUM_S_LOG    = 2,      // Log2(C_NUM_S)
   parameter integer C_GRANT_ENC    = 0,      // Enable encoded grant output
   parameter integer C_GRANT_HOT    = 1       // Enable 1-hot grant output
   )
  (
   // Global Inputs
   input  wire                     ACLK,
   input  wire                     ARESET,
   // Slave  Ports
   input  wire [C_NUM_S-1:0]       S_VALID,      // Request from each slave
   output wire [C_NUM_S-1:0]       S_READY,      // Grant response to each slave
   // Master Ports
   output wire [C_NUM_S_LOG-1:0]   M_GRANT_ENC,  // Granted slave index (encoded)
   output wire [C_NUM_S-1:0]       M_GRANT_HOT,  // Granted slave index (1-hot)
   output wire                     M_VALID,      // Grant event
   input  wire                     M_READY
   );

  // Generates a binary coded from onehotone encoded
  function [4:0] f_hot2enc
    (
      input [16:0]  one_hot
    );
    begin
      f_hot2enc[0] = |(one_hot & 17'b01010101010101010);
      f_hot2enc[1] = |(one_hot & 17'b01100110011001100);
      f_hot2enc[2] = |(one_hot & 17'b01111000011110000);
      f_hot2enc[3] = |(one_hot & 17'b01111111100000000);
      f_hot2enc[4] = |(one_hot & 17'b10000000000000000);
    end
  endfunction

  (* use_clock_enable = "yes" *)
  reg [C_NUM_S-1:0]      chosen = 0;
  
  wire [C_NUM_S-1:0]     grant_hot; 
  wire                   master_selected; 
  wire                   active_master;
  wire                   need_arbitration;
  wire                   m_valid_i;
  wire [C_NUM_S-1:0]     s_ready_i;
  wire                   access_done;
  reg [C_NUM_S-1:0]      last_rr_hot;
  wire [C_NUM_S-1:0]     valid_rr;
  reg [C_NUM_S-1:0]      next_rr_hot;
  reg [C_NUM_S*C_NUM_S-1:0] carry_rr;
  reg [C_NUM_S*C_NUM_S-1:0] mask_rr;
  integer                 i;
  integer                 j;
  integer                 n;
  
  /////////////////////////////////////////////////////////////////////////////
  //   
  // Implementation of the arbiter outputs independant of arbitration
  //
  /////////////////////////////////////////////////////////////////////////////
  
  // Mask the current requests with the chosen master
  assign grant_hot        = chosen & S_VALID;

  // See if we have a selected master
  assign master_selected  = |grant_hot[0+:C_NUM_S];

  // See if we have current requests
  assign active_master    = |S_VALID;

  // Access is completed
  assign access_done = m_valid_i & M_READY;
  
  // Need to handle if we drive S_ready combinatorial and without an IDLE state

  // Drive S_READY on the master who has been chosen when we get a M_READY
  assign s_ready_i = {C_NUM_S{M_READY}} & grant_hot[0+:C_NUM_S];

  // Drive M_VALID if we have a selected master
  assign m_valid_i = master_selected;
                
  // If we have request and not a selected master, we need to arbitrate a new chosen 
  assign need_arbitration = (active_master & ~master_selected) | access_done;

  // need internal signals of the output signals
  assign M_VALID = m_valid_i;
  assign S_READY = s_ready_i;

  /////////////////////////////////////////////////////////////////////////////
  // Assign conditional onehot target output signal.
  assign M_GRANT_HOT = (C_GRANT_HOT == 1) ? grant_hot[0+:C_NUM_S] : {C_NUM_S{1'b0}};
  /////////////////////////////////////////////////////////////////////////////
  // Assign conditional encoded target output signal.
  assign M_GRANT_ENC = (C_GRANT_ENC == 1) ? f_hot2enc(grant_hot) : {C_NUM_S_LOG{1'b0}};
  
  /////////////////////////////////////////////////////////////////////////////
  // Select a new chosen when we need to arbitrate
  // If we don't have a new chosen, keep the old one since it's a good chance
  // that it will do another request
  always @(posedge ACLK)
    begin
      if (ARESET) begin
        chosen <= {C_NUM_S{1'b0}};
        last_rr_hot <= {1'b1, {C_NUM_S-1{1'b0}}};
      end else if (need_arbitration) begin
        chosen <= next_rr_hot;   
        if (|next_rr_hot) last_rr_hot <= next_rr_hot;
      end
    end

  assign valid_rr =  S_VALID;

  /////////////////////////////////////////////////////////////////////////////
  // Round-robin arbiter
  // Selects next request to grant from among inputs with PRIO = 0, if any.
  /////////////////////////////////////////////////////////////////////////////
  
  always @ * begin
    next_rr_hot = 0;
    for (i=0;i<C_NUM_S;i=i+1) begin
      n = (i>0) ? (i-1) : (C_NUM_S-1);
      carry_rr[i*C_NUM_S] = last_rr_hot[n];
      mask_rr[i*C_NUM_S] = ~valid_rr[n];
      for (j=1;j<C_NUM_S;j=j+1) begin
        n = (i-j > 0) ? (i-j-1) : (C_NUM_S+i-j-1);
        carry_rr[i*C_NUM_S+j] = carry_rr[i*C_NUM_S+j-1] | (last_rr_hot[n] & mask_rr[i*C_NUM_S+j-1]);
        if (j < C_NUM_S-1) begin
          mask_rr[i*C_NUM_S+j] = mask_rr[i*C_NUM_S+j-1] & ~valid_rr[n];
        end
      end   
      next_rr_hot[i] = valid_rr[i] & carry_rr[(i+1)*C_NUM_S-1];
    end
  end
  
endmodule


// -- (c) Copyright 2009 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
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// -- (individually and collectively, "Critical
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// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// File name: crossbar_sasd.v
//
// Description: 
//   This module is a M-master to N-slave AXI axi_crossbar_v2_1_20_crossbar switch.
//   Single transaction issuing, single arbiter (both W&R), single data pathways.
//   The interface of this module consists of a vectored slave and master interface
//     in which all slots are sized and synchronized to the native width and clock 
//     of the interconnect, and are all AXI4 protocol.
//   All width, clock and protocol conversions are done outside this block, as are
//     any pipeline registers or data FIFOs.
//   This module contains all arbitration, decoders and channel multiplexing logic.
//     It also contains the diagnostic registers and control interface.
//
//--------------------------------------------------------------------------
//
// Structure:
//    crossbar_sasd
//      addr_arbiter_sasd
//        mux_enc
//      addr_decoder
//        comparator_static
//      splitter
//      mux_enc
//      axic_register_slice
//      decerr_slave
//      
//-----------------------------------------------------------------------------
`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_crossbar_sasd #
  (
   parameter         C_FAMILY                       = "none", 
   parameter integer C_NUM_SLAVE_SLOTS              =   1, 
   parameter integer C_NUM_MASTER_SLOTS             =   1, 
   parameter integer C_NUM_ADDR_RANGES              = 1,
   parameter integer C_AXI_ID_WIDTH                   = 1, 
   parameter integer C_AXI_ADDR_WIDTH                 = 32, 
   parameter integer C_AXI_DATA_WIDTH = 32, 
   parameter integer C_AXI_PROTOCOL                 = 0, 
   parameter [C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64-1:0] C_M_AXI_BASE_ADDR = {C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64{1'b1}}, 
   parameter [C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64-1:0] C_M_AXI_HIGH_ADDR = {C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64{1'b0}}, 
   parameter [C_NUM_SLAVE_SLOTS*64-1:0] C_S_AXI_BASE_ID = {C_NUM_SLAVE_SLOTS*64{1'b0}},
   parameter [C_NUM_SLAVE_SLOTS*64-1:0] C_S_AXI_HIGH_ID = {C_NUM_SLAVE_SLOTS*64{1'b0}},
   parameter integer C_AXI_SUPPORTS_USER_SIGNALS      = 0,
   parameter integer C_AXI_AWUSER_WIDTH               = 1,
   parameter integer C_AXI_ARUSER_WIDTH               = 1,
   parameter integer C_AXI_WUSER_WIDTH                = 1,
   parameter integer C_AXI_RUSER_WIDTH                = 1,
   parameter integer C_AXI_BUSER_WIDTH                = 1,
   parameter [C_NUM_SLAVE_SLOTS-1:0] C_S_AXI_SUPPORTS_WRITE           = {C_NUM_SLAVE_SLOTS{1'b1}}, 
   parameter [C_NUM_SLAVE_SLOTS-1:0] C_S_AXI_SUPPORTS_READ            = {C_NUM_SLAVE_SLOTS{1'b1}}, 
   parameter [C_NUM_MASTER_SLOTS-1:0] C_M_AXI_SUPPORTS_WRITE           = {C_NUM_MASTER_SLOTS{1'b1}}, 
   parameter [C_NUM_MASTER_SLOTS-1:0] C_M_AXI_SUPPORTS_READ            = {C_NUM_MASTER_SLOTS{1'b1}}, 
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_ARB_PRIORITY             = {C_NUM_SLAVE_SLOTS{32'h00000000}},
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_SECURE                   = {C_NUM_MASTER_SLOTS{32'h00000000}},
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_ERR_MODE            = {C_NUM_MASTER_SLOTS{32'h00000000}},
   parameter integer C_R_REGISTER               = 0,
   parameter integer C_RANGE_CHECK                    = 0,
   parameter integer C_ADDR_DECODE                    = 0,
   parameter integer C_DEBUG              = 1
   )
  (
   // Global Signals
   input  wire                                                    ACLK,
   input  wire                                                    ARESETN,
   // Slave Interface Write Address Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_AWID,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]           S_AXI_AWADDR,
   input  wire [C_NUM_SLAVE_SLOTS*8-1:0]                          S_AXI_AWLEN,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          S_AXI_AWSIZE,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_AWBURST,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_AWLOCK,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_AWCACHE,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          S_AXI_AWPROT,
//   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_AWREGION,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_AWQOS,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_AWUSER_WIDTH-1:0]         S_AXI_AWUSER,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_AWVALID,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_AWREADY,
   // Slave Interface Write Data Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_WID,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH-1:0]     S_AXI_WDATA,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH/8-1:0]   S_AXI_WSTRB,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_WLAST,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_WUSER_WIDTH-1:0]          S_AXI_WUSER,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_WVALID,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_WREADY,
   // Slave Interface Write Response Ports
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_BID,
   output wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_BRESP,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_BUSER_WIDTH-1:0]          S_AXI_BUSER,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_BVALID,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_BREADY,
   // Slave Interface Read Address Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_ARID,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]           S_AXI_ARADDR,
   input  wire [C_NUM_SLAVE_SLOTS*8-1:0]                          S_AXI_ARLEN,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          S_AXI_ARSIZE,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_ARBURST,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_ARLOCK,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_ARCACHE,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          S_AXI_ARPROT,
//   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_ARREGION,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_ARQOS,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ARUSER_WIDTH-1:0]         S_AXI_ARUSER,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_ARVALID,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_ARREADY,
   // Slave Interface Read Data Ports
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_RID,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH-1:0]     S_AXI_RDATA,
   output wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_RRESP,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_RLAST,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_RUSER_WIDTH-1:0]          S_AXI_RUSER,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_RVALID,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_RREADY,
   // Master Interface Write Address Port
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_AWID,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ADDR_WIDTH-1:0]          M_AXI_AWADDR,
   output wire [C_NUM_MASTER_SLOTS*8-1:0]                         M_AXI_AWLEN,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         M_AXI_AWSIZE,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_AWBURST,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_AWLOCK,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_AWCACHE,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         M_AXI_AWPROT,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_AWREGION,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_AWQOS,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_AWUSER_WIDTH-1:0]        M_AXI_AWUSER,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_AWVALID,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_AWREADY,
   // Master Interface Write Data Ports
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_WID,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH-1:0]    M_AXI_WDATA,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH/8-1:0]  M_AXI_WSTRB,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_WLAST,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_WUSER_WIDTH-1:0]         M_AXI_WUSER,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_WVALID,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_WREADY,
   // Master Interface Write Response Ports
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_BID,  // Unused
   input  wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_BRESP,
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH-1:0]         M_AXI_BUSER,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_BVALID,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_BREADY,
   // Master Interface Read Address Port
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_ARID,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ADDR_WIDTH-1:0]          M_AXI_ARADDR,
   output wire [C_NUM_MASTER_SLOTS*8-1:0]                         M_AXI_ARLEN,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         M_AXI_ARSIZE,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_ARBURST,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_ARLOCK,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_ARCACHE,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         M_AXI_ARPROT,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_ARREGION,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_ARQOS,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ARUSER_WIDTH-1:0]        M_AXI_ARUSER,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_ARVALID,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_ARREADY,
   // Master Interface Read Data Ports
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_RID,  // Unused
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH-1:0]    M_AXI_RDATA,
   input  wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_RRESP,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_RLAST,
   input wire [C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH-1:0]         M_AXI_RUSER,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_RVALID,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_RREADY
   );
   
  localparam integer  P_AXI4 = 0;
  localparam integer  P_AXI3 = 1;
  localparam integer  P_AXILITE = 2;
  localparam integer P_NUM_MASTER_SLOTS_DE = C_RANGE_CHECK ? C_NUM_MASTER_SLOTS+1 : C_NUM_MASTER_SLOTS;
  localparam integer P_NUM_MASTER_SLOTS_LOG = (C_NUM_MASTER_SLOTS>1) ? f_ceil_log2(C_NUM_MASTER_SLOTS) : 1;
  localparam integer P_NUM_MASTER_SLOTS_DE_LOG = (P_NUM_MASTER_SLOTS_DE>1) ? f_ceil_log2(P_NUM_MASTER_SLOTS_DE) : 1;
  localparam integer P_NUM_SLAVE_SLOTS_LOG = (C_NUM_SLAVE_SLOTS>1) ? f_ceil_log2(C_NUM_SLAVE_SLOTS) : 1;
  localparam integer P_AXI_AUSER_WIDTH = (C_AXI_AWUSER_WIDTH > C_AXI_ARUSER_WIDTH) ? C_AXI_AWUSER_WIDTH : C_AXI_ARUSER_WIDTH;
  localparam integer P_AXI_WID_WIDTH = (C_AXI_PROTOCOL == P_AXI3) ? C_AXI_ID_WIDTH : 1;
  localparam integer P_AMESG_WIDTH = C_AXI_ID_WIDTH + C_AXI_ADDR_WIDTH + 8+3+2+3+2+4+4 + P_AXI_AUSER_WIDTH + 4;
  localparam integer P_BMESG_WIDTH = 2 + C_AXI_BUSER_WIDTH;
  localparam integer P_RMESG_WIDTH = 1+2 + C_AXI_DATA_WIDTH + C_AXI_RUSER_WIDTH;
  localparam integer P_WMESG_WIDTH = 1 + C_AXI_DATA_WIDTH + C_AXI_DATA_WIDTH/8 + C_AXI_WUSER_WIDTH + P_AXI_WID_WIDTH;
  localparam [31:0]   P_AXILITE_ERRMODE = 32'h00000001;
  localparam integer P_NONSECURE_BIT = 1; 
  localparam [C_NUM_MASTER_SLOTS-1:0] P_M_SECURE_MASK = f_bit32to1_mi(C_M_AXI_SECURE);  // Mask of secure MI-slots
  localparam [C_NUM_MASTER_SLOTS-1:0] P_M_AXILITE_MASK = f_m_axilite(0);  // Mask of axilite rule-check MI-slots
  localparam [1:0]   P_FIXED = 2'b00;
  localparam integer P_BYPASS = 0;
  localparam integer P_LIGHTWT = 7;
  localparam integer P_FULLY_REG = 1;
  localparam integer P_R_REG_CONFIG = C_R_REGISTER == 8 ?  // "Automatic" reg-slice
        (C_RANGE_CHECK ? ((C_AXI_PROTOCOL == P_AXILITE) ? P_LIGHTWT : P_FULLY_REG) : P_BYPASS) :  // Bypass if no R-channel mux
        C_R_REGISTER;
  localparam P_DECERR = 2'b11;

  //---------------------------------------------------------------------------
  // Functions
  //---------------------------------------------------------------------------
  // Ceiling of log2(x)
  function integer f_ceil_log2
    (
     input integer x
     );
    integer acc;
    begin
      acc=0;
      while ((2**acc) < x)
        acc = acc + 1;
      f_ceil_log2 = acc;
    end
  endfunction

  // Isolate thread bits of input S_ID and add to BASE_ID (RNG00) to form MI-side ID value
  //   only for end-point SI-slots
  function [C_AXI_ID_WIDTH-1:0] f_extend_ID
    (
     input [C_AXI_ID_WIDTH-1:0] s_id,
     input integer slot
     );
    begin
      f_extend_ID = C_S_AXI_BASE_ID[slot*64+:C_AXI_ID_WIDTH] | (s_id & (C_S_AXI_BASE_ID[slot*64+:C_AXI_ID_WIDTH] ^ C_S_AXI_HIGH_ID[slot*64+:C_AXI_ID_WIDTH]));
    end
  endfunction

  // Convert Bit32 vector of range [0,1] to Bit1 vector on MI
  function [C_NUM_MASTER_SLOTS-1:0] f_bit32to1_mi
    (input [C_NUM_MASTER_SLOTS*32-1:0] vec32);
    integer mi;
    begin
      for (mi=0; mi<C_NUM_MASTER_SLOTS; mi=mi+1) begin
        f_bit32to1_mi[mi] = vec32[mi*32];
      end
    end
  endfunction

  // AxiLite error-checking mask (on MI)      
  function [C_NUM_MASTER_SLOTS-1:0] f_m_axilite
    (
      input integer null_arg
    );
    integer mi;
    begin
      for (mi=0; mi<C_NUM_MASTER_SLOTS; mi=mi+1) begin
        f_m_axilite[mi] = (C_M_AXI_ERR_MODE[mi*32+:32] == P_AXILITE_ERRMODE);
      end
    end
  endfunction

  genvar gen_si_slot;
  genvar gen_mi_slot;
  wire [C_NUM_SLAVE_SLOTS*P_AMESG_WIDTH-1:0]                      si_awmesg          ;
  wire [C_NUM_SLAVE_SLOTS*P_AMESG_WIDTH-1:0]                      si_armesg          ;
  wire [P_AMESG_WIDTH-1:0]                                        aa_amesg         ;
  wire [C_AXI_ID_WIDTH-1:0]                                       mi_aid            ;
  wire [C_AXI_ADDR_WIDTH-1:0]                                     mi_aaddr          ;
  wire [8-1:0]                                                    mi_alen           ;
  wire [3-1:0]                                                    mi_asize          ;
  wire [2-1:0]                                                    mi_alock          ;
  wire [3-1:0]                                                    mi_aprot          ;
  wire [2-1:0]                                                    mi_aburst        ;
  wire [4-1:0]                                                    mi_acache        ;
  wire [4-1:0]                                                    mi_aregion        ;
  wire [4-1:0]                                                    mi_aqos        ;
  wire [P_AXI_AUSER_WIDTH-1:0]                                    mi_auser        ;
  wire [4-1:0]                                                    target_region        ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  aa_grant_hot     ;
  wire [P_NUM_SLAVE_SLOTS_LOG-1:0]                                  aa_grant_enc     ;
  wire                                                            aa_grant_rnw ;
  wire                                                            aa_grant_any ;
  wire [C_NUM_MASTER_SLOTS-1:0]                                   target_mi_hot    ;
  wire [P_NUM_MASTER_SLOTS_LOG-1:0]                                   target_mi_enc    ;
  reg  [P_NUM_MASTER_SLOTS_DE-1:0]                               m_atarget_hot = 0    ;
  reg  [P_NUM_MASTER_SLOTS_DE_LOG-1:0]                               m_atarget_enc = 0    ;
  wire [P_NUM_MASTER_SLOTS_DE_LOG-1:0]                               m_atarget_enc_comb    ;
  wire                                                            match;
  wire                                                            any_error         ;
  wire [7:0]                                                      m_aerror_i         ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_awvalid            ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_awready            ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_arvalid            ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_arready            ;
  wire                                                            aa_awvalid         ;
  wire                                                            aa_awready         ;
  wire                                                            aa_arvalid         ;
  wire                                                            aa_arready         ;
  wire                                                            mi_awvalid_en;
  wire                                                            mi_awready_mux;
  wire                                                            mi_arvalid_en;
  wire                                                            mi_arready_mux;
  wire                                                            w_transfer_en;
  wire                                                            w_complete_mux;
  wire                                                            b_transfer_en;
  wire                                                            b_complete_mux;
  wire                                                            r_transfer_en;
  wire                                                            r_complete_mux;
  wire                                                            target_secure;
  wire                                                            target_write;
  wire                                                            target_read;
  wire                                                            target_axilite;
  
  wire [P_BMESG_WIDTH-1:0]                                        si_bmesg           ;
  wire [P_NUM_MASTER_SLOTS_DE*P_BMESG_WIDTH-1:0]                 mi_bmesg           ;
  wire [P_NUM_MASTER_SLOTS_DE*2-1:0]                             mi_bresp           ;
  wire [P_NUM_MASTER_SLOTS_DE*C_AXI_BUSER_WIDTH-1:0]             mi_buser           ;
  wire [2-1:0]                                                    si_bresp           ;
  wire [C_AXI_BUSER_WIDTH-1:0]                                    si_buser           ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_bvalid          ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_bready          ;
  wire                                                            aa_bvalid          ;
  wire                                                            aa_bready         ;
  wire                                                            si_bready         ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                                    si_bvalid;
  
  wire [P_RMESG_WIDTH-1:0]                                        aa_rmesg           ;
  wire [P_RMESG_WIDTH-1:0]                                        sr_rmesg           ;
  wire [P_NUM_MASTER_SLOTS_DE*P_RMESG_WIDTH-1:0]                 mi_rmesg           ;
  wire [P_NUM_MASTER_SLOTS_DE*2-1:0]                             mi_rresp           ;
  wire [P_NUM_MASTER_SLOTS_DE*C_AXI_RUSER_WIDTH-1:0]             mi_ruser           ;
  wire [P_NUM_MASTER_SLOTS_DE*C_AXI_DATA_WIDTH-1:0]          mi_rdata              ;
  wire [P_NUM_MASTER_SLOTS_DE*1-1:0]                             mi_rlast              ;
  wire [2-1:0]                                                    si_rresp           ;
  wire [C_AXI_RUSER_WIDTH-1:0]                                    si_ruser           ;
  wire [C_AXI_DATA_WIDTH-1:0]                                 si_rdata              ;
  wire                                                            si_rlast              ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_rvalid          ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_rready          ;
  wire                                                            aa_rvalid          ;
  wire                                                            aa_rready         ;
  wire                                                            sr_rvalid          ;
  wire                                                            si_rready         ;
  wire                                                            sr_rready         ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                                    si_rvalid;
  
  wire [C_NUM_SLAVE_SLOTS*P_WMESG_WIDTH-1:0]                      si_wmesg           ;
  wire [P_WMESG_WIDTH-1:0]                                        mi_wmesg           ;
  wire [C_AXI_ID_WIDTH-1:0]                                    mi_wid              ;
  wire [C_AXI_DATA_WIDTH-1:0]                            mi_wdata              ;
  wire [C_AXI_DATA_WIDTH/8-1:0]                          mi_wstrb              ;
  wire [C_AXI_WUSER_WIDTH-1:0]                                    mi_wuser              ;
  wire [1-1:0]                                                    mi_wlast              ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_wvalid          ;
  wire [P_NUM_MASTER_SLOTS_DE-1:0]                             mi_wready          ;
  wire                                                            aa_wvalid          ;
  wire                                                            aa_wready         ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                                    si_wready;
  
  reg  [7:0]                                                      debug_r_beat_cnt_i;
  reg  [7:0]                                                      debug_w_beat_cnt_i;
  reg  [7:0]                                                      debug_aw_trans_seq_i;
  reg  [7:0]                                                      debug_ar_trans_seq_i;

  reg aresetn_d = 1'b0; // Reset delay register
  always @(posedge ACLK) begin
    if (~ARESETN) begin
      aresetn_d <= 1'b0;
    end else begin
      aresetn_d <= ARESETN;
    end
  end
  wire reset;
  assign reset = ~aresetn_d;

  generate
    axi_crossbar_v2_1_20_addr_arbiter_sasd #
      (
       .C_FAMILY                (C_FAMILY),
       .C_NUM_S                 (C_NUM_SLAVE_SLOTS),
       .C_NUM_S_LOG             (P_NUM_SLAVE_SLOTS_LOG),
       .C_AMESG_WIDTH            (P_AMESG_WIDTH),
       .C_GRANT_ENC             (1),
       .C_ARB_PRIORITY          (C_S_AXI_ARB_PRIORITY)
       )
      addr_arbiter_inst
        (
         .ACLK                  (ACLK),
         .ARESET                (reset),
         // Vector of SI-side AW command request inputs
         .S_AWMESG                (si_awmesg),
         .S_ARMESG                (si_armesg),
         .S_AWVALID               (S_AXI_AWVALID),
         .S_AWREADY               (S_AXI_AWREADY),
         .S_ARVALID               (S_AXI_ARVALID),
         .S_ARREADY               (S_AXI_ARREADY),
         .M_GRANT_ENC           (aa_grant_enc),
         .M_GRANT_HOT           (aa_grant_hot),  // SI-slot 1-hot mask of granted command
         .M_GRANT_ANY             (aa_grant_any),
         .M_GRANT_RNW             (aa_grant_rnw),
         .M_AMESG                (aa_amesg),  // Either S_AWMESG or S_ARMESG, as indicated by M_AWVALID and M_ARVALID.
         .M_AWVALID               (aa_awvalid),
         .M_AWREADY               (aa_awready),
         .M_ARVALID               (aa_arvalid),
         .M_ARREADY               (aa_arready)
         );

    if (C_ADDR_DECODE) begin : gen_addr_decoder
      axi_crossbar_v2_1_20_addr_decoder #
        (
          .C_FAMILY          (C_FAMILY),
          .C_NUM_TARGETS     (C_NUM_MASTER_SLOTS),
          .C_NUM_TARGETS_LOG (P_NUM_MASTER_SLOTS_LOG),
          .C_NUM_RANGES      (C_NUM_ADDR_RANGES),
          .C_ADDR_WIDTH      (C_AXI_ADDR_WIDTH),
          .C_TARGET_ENC      (1),
          .C_TARGET_HOT      (1),
          .C_REGION_ENC      (1),
          .C_BASE_ADDR      (C_M_AXI_BASE_ADDR),
          .C_HIGH_ADDR      (C_M_AXI_HIGH_ADDR),
          .C_TARGET_QUAL     ({C_NUM_MASTER_SLOTS{1'b1}}),
          .C_RESOLUTION      (2)
        ) 
        addr_decoder_inst 
        (
          .ADDR             (mi_aaddr),        
          .TARGET_HOT       (target_mi_hot),  
          .TARGET_ENC       (target_mi_enc),  
          .MATCH            (match),       
          .REGION           (target_region)      
        );
    end else begin : gen_no_addr_decoder
      assign target_mi_hot = 1;
      assign match = 1'b1;
      assign target_region = 4'b0000;
    end  // gen_addr_decoder
    
    // AW-channel arbiter command transfer completes upon completion of both M-side AW-channel transfer and B channel completion.
    axi_crossbar_v2_1_20_splitter #  
      (
        .C_NUM_M                (3)
      )
      splitter_aw
      (
         .ACLK                  (ACLK),
         .ARESET                (reset),
         .S_VALID              (aa_awvalid),
         .S_READY              (aa_awready),
         .M_VALID              ({mi_awvalid_en, w_transfer_en, b_transfer_en}),
         .M_READY              ({mi_awready_mux, w_complete_mux, b_complete_mux})
      );
    
    // AR-channel arbiter command transfer completes upon completion of both M-side AR-channel transfer and R channel completion.
    axi_crossbar_v2_1_20_splitter #  
      (
        .C_NUM_M                (2)
      )
      splitter_ar
      (
         .ACLK                  (ACLK),
         .ARESET                (reset),
         .S_VALID              (aa_arvalid),
         .S_READY              (aa_arready),
         .M_VALID              ({mi_arvalid_en, r_transfer_en}),
         .M_READY              ({mi_arready_mux, r_complete_mux})
      );
    
    assign target_secure = |(target_mi_hot & P_M_SECURE_MASK);
    assign target_write = |(target_mi_hot & C_M_AXI_SUPPORTS_WRITE);
    assign target_read = |(target_mi_hot & C_M_AXI_SUPPORTS_READ);
    assign target_axilite = |(target_mi_hot & P_M_AXILITE_MASK);
    
    assign any_error = C_RANGE_CHECK && (m_aerror_i != 0);             // DECERR if error-detection enabled and any error condition.
    assign m_aerror_i[0] = ~match;                                     // Invalid target address
    assign m_aerror_i[1] = target_secure && mi_aprot[P_NONSECURE_BIT]; // TrustZone violation
    assign m_aerror_i[2] = target_axilite && ((mi_alen != 0) || 
      (mi_asize[1:0] == 2'b11) || (mi_asize[2] == 1'b1));              // AxiLite access violation
    assign m_aerror_i[3] = (~aa_grant_rnw && ~target_write) ||
      (aa_grant_rnw && ~target_read);                                  // R/W direction unsupported by target
    assign m_aerror_i[7:4] = 4'b0000;                                     // Reserved
    assign m_atarget_enc_comb = any_error ? (P_NUM_MASTER_SLOTS_DE-1) : target_mi_enc;  // Select MI slot or decerr_slave
      
    always @(posedge ACLK) begin
      if (reset) begin
        m_atarget_hot <= 0;
        m_atarget_enc <= 0;
      end else begin
        m_atarget_hot <= {P_NUM_MASTER_SLOTS_DE{aa_grant_any}} & (any_error ? {1'b1, {C_NUM_MASTER_SLOTS{1'b0}}} : {1'b0, target_mi_hot});  // Select MI slot or decerr_slave
        m_atarget_enc <= m_atarget_enc_comb;
      end
    end
    
    // Receive AWREADY from targeted MI.
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (P_NUM_MASTER_SLOTS_DE),
       .C_SEL_WIDTH   (P_NUM_MASTER_SLOTS_DE_LOG),
       .C_DATA_WIDTH  (1)
      ) mi_awready_mux_inst 
      (
       .S   (m_atarget_enc),
       .A   (mi_awready),
       .O   (mi_awready_mux),
       .OE  (mi_awvalid_en)
      ); 
      
    // Receive ARREADY from targeted MI.
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (P_NUM_MASTER_SLOTS_DE),
       .C_SEL_WIDTH   (P_NUM_MASTER_SLOTS_DE_LOG),
       .C_DATA_WIDTH  (1)
      ) mi_arready_mux_inst 
      (
       .S   (m_atarget_enc),
       .A   (mi_arready),
       .O   (mi_arready_mux),
       .OE  (mi_arvalid_en)
      ); 
      
    assign mi_awvalid = m_atarget_hot & {P_NUM_MASTER_SLOTS_DE{mi_awvalid_en}};  // Assert AWVALID on targeted MI.
    assign mi_arvalid = m_atarget_hot & {P_NUM_MASTER_SLOTS_DE{mi_arvalid_en}};  // Assert ARVALID on targeted MI.
    assign M_AXI_AWVALID = mi_awvalid[0+:C_NUM_MASTER_SLOTS];  // Propagate to MI slots.
    assign M_AXI_ARVALID = mi_arvalid[0+:C_NUM_MASTER_SLOTS];  // Propagate to MI slots.
    assign mi_awready[0+:C_NUM_MASTER_SLOTS] = M_AXI_AWREADY;  // Copy from MI slots.
    assign mi_arready[0+:C_NUM_MASTER_SLOTS] = M_AXI_ARREADY;  // Copy from MI slots.
    
    // Receive WREADY from targeted MI.
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (P_NUM_MASTER_SLOTS_DE),
       .C_SEL_WIDTH   (P_NUM_MASTER_SLOTS_DE_LOG),
       .C_DATA_WIDTH  (1)
      ) mi_wready_mux_inst 
      (
       .S   (m_atarget_enc),
       .A   (mi_wready),
       .O   (aa_wready),
       .OE  (w_transfer_en)
      ); 
      
    assign mi_wvalid = m_atarget_hot & {P_NUM_MASTER_SLOTS_DE{aa_wvalid}};  // Assert WVALID on targeted MI.
    assign si_wready = aa_grant_hot & {C_NUM_SLAVE_SLOTS{aa_wready}};  // Assert WREADY on granted SI.
    assign S_AXI_WREADY = si_wready;
    assign w_complete_mux = aa_wready & aa_wvalid & mi_wlast;  // W burst complete on on designated SI/MI.
    
    // Receive RREADY from granted SI.
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (C_NUM_SLAVE_SLOTS),
       .C_SEL_WIDTH   (P_NUM_SLAVE_SLOTS_LOG),
       .C_DATA_WIDTH  (1)
      ) si_rready_mux_inst 
      (
       .S   (aa_grant_enc),
       .A   (S_AXI_RREADY),
       .O   (si_rready),
       .OE  (r_transfer_en)
      ); 
      
    assign sr_rready = si_rready & r_transfer_en;
    assign mi_rready = m_atarget_hot & {P_NUM_MASTER_SLOTS_DE{aa_rready}};  // Assert RREADY on targeted MI.
    assign si_rvalid = aa_grant_hot & {C_NUM_SLAVE_SLOTS{sr_rvalid}};  // Assert RVALID on granted SI.
    assign S_AXI_RVALID = si_rvalid;
    assign r_complete_mux = sr_rready & sr_rvalid & si_rlast;  // R burst complete on on designated SI/MI.
    
    // Receive BREADY from granted SI.
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (C_NUM_SLAVE_SLOTS),
       .C_SEL_WIDTH   (P_NUM_SLAVE_SLOTS_LOG),
       .C_DATA_WIDTH  (1)
      ) si_bready_mux_inst 
      (
       .S   (aa_grant_enc),
       .A   (S_AXI_BREADY),
       .O   (si_bready),
       .OE  (b_transfer_en)
      ); 
      
    assign aa_bready = si_bready & b_transfer_en;
    assign mi_bready = m_atarget_hot & {P_NUM_MASTER_SLOTS_DE{aa_bready}};  // Assert BREADY on targeted MI.
    assign si_bvalid = aa_grant_hot & {C_NUM_SLAVE_SLOTS{aa_bvalid}};  // Assert BVALID on granted SI.
    assign S_AXI_BVALID = si_bvalid;
    assign b_complete_mux = aa_bready & aa_bvalid;  // B transfer complete on on designated SI/MI.
    
    for (gen_si_slot=0; gen_si_slot<C_NUM_SLAVE_SLOTS; gen_si_slot=gen_si_slot+1) begin : gen_si_amesg
      assign si_armesg[gen_si_slot*P_AMESG_WIDTH +: P_AMESG_WIDTH] = {  // Concatenate from MSB to LSB
        4'b0000,
//        S_AXI_ARREGION[gen_si_slot*4+:4],
        S_AXI_ARUSER[gen_si_slot*C_AXI_ARUSER_WIDTH +: C_AXI_ARUSER_WIDTH],
        S_AXI_ARQOS[gen_si_slot*4+:4],
        S_AXI_ARCACHE[gen_si_slot*4+:4],
        S_AXI_ARBURST[gen_si_slot*2+:2],
        S_AXI_ARPROT[gen_si_slot*3+:3],
        S_AXI_ARLOCK[gen_si_slot*2+:2],
        S_AXI_ARSIZE[gen_si_slot*3+:3],
        S_AXI_ARLEN[gen_si_slot*8+:8],
        S_AXI_ARADDR[gen_si_slot*C_AXI_ADDR_WIDTH +: C_AXI_ADDR_WIDTH],
        f_extend_ID(S_AXI_ARID[gen_si_slot*C_AXI_ID_WIDTH +: C_AXI_ID_WIDTH], gen_si_slot)
        };
      assign si_awmesg[gen_si_slot*P_AMESG_WIDTH +: P_AMESG_WIDTH] = {  // Concatenate from MSB to LSB
        4'b0000,
//        S_AXI_AWREGION[gen_si_slot*4+:4],
        S_AXI_AWUSER[gen_si_slot*C_AXI_AWUSER_WIDTH +: C_AXI_AWUSER_WIDTH],
        S_AXI_AWQOS[gen_si_slot*4+:4],
        S_AXI_AWCACHE[gen_si_slot*4+:4],
        S_AXI_AWBURST[gen_si_slot*2+:2],
        S_AXI_AWPROT[gen_si_slot*3+:3],
        S_AXI_AWLOCK[gen_si_slot*2+:2],
        S_AXI_AWSIZE[gen_si_slot*3+:3],
        S_AXI_AWLEN[gen_si_slot*8+:8],
        S_AXI_AWADDR[gen_si_slot*C_AXI_ADDR_WIDTH +: C_AXI_ADDR_WIDTH],
        f_extend_ID(S_AXI_AWID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH], gen_si_slot)
        };
    end  // gen_si_amesg
    
    assign mi_aid        = aa_amesg[0 +: C_AXI_ID_WIDTH];
    assign mi_aaddr      = aa_amesg[C_AXI_ID_WIDTH +: C_AXI_ADDR_WIDTH];
    assign mi_alen       = aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH +: 8];
    assign mi_asize      = aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8 +: 3];
    assign mi_alock      = aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3 +: 2];
    assign mi_aprot      = aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2 +: 3];
    assign mi_aburst     = aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3 +: 2];
    assign mi_acache     = aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+2 +: 4];
    assign mi_aqos       = aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+2+4 +: 4];
    assign mi_auser      = aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+2+4+4 +: P_AXI_AUSER_WIDTH];
    assign mi_aregion    = (C_ADDR_DECODE != 0) ? target_region : aa_amesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+2+4+4+P_AXI_AUSER_WIDTH +: 4];
      
    // Broadcast AW transfer payload to all MI-slots
    assign M_AXI_AWID        = {C_NUM_MASTER_SLOTS{mi_aid}};
    assign M_AXI_AWADDR      = {C_NUM_MASTER_SLOTS{mi_aaddr}};
    assign M_AXI_AWLEN       = {C_NUM_MASTER_SLOTS{mi_alen }};
    assign M_AXI_AWSIZE      = {C_NUM_MASTER_SLOTS{mi_asize}};
    assign M_AXI_AWLOCK      = {C_NUM_MASTER_SLOTS{mi_alock}};
    assign M_AXI_AWPROT      = {C_NUM_MASTER_SLOTS{mi_aprot}};
    assign M_AXI_AWREGION    = {C_NUM_MASTER_SLOTS{mi_aregion}};
    assign M_AXI_AWBURST     = {C_NUM_MASTER_SLOTS{mi_aburst}};
    assign M_AXI_AWCACHE     = {C_NUM_MASTER_SLOTS{mi_acache}};
    assign M_AXI_AWQOS       = {C_NUM_MASTER_SLOTS{mi_aqos  }};
    assign M_AXI_AWUSER      = {C_NUM_MASTER_SLOTS{mi_auser[0+:C_AXI_AWUSER_WIDTH] }};
    
    // Broadcast AR transfer payload to all MI-slots
    assign M_AXI_ARID        = {C_NUM_MASTER_SLOTS{mi_aid}};
    assign M_AXI_ARADDR      = {C_NUM_MASTER_SLOTS{mi_aaddr}};                        
    assign M_AXI_ARLEN       = {C_NUM_MASTER_SLOTS{mi_alen }};                        
    assign M_AXI_ARSIZE      = {C_NUM_MASTER_SLOTS{mi_asize}};                        
    assign M_AXI_ARLOCK      = {C_NUM_MASTER_SLOTS{mi_alock}};                        
    assign M_AXI_ARPROT      = {C_NUM_MASTER_SLOTS{mi_aprot}};                        
    assign M_AXI_ARREGION    = {C_NUM_MASTER_SLOTS{mi_aregion}};                          
    assign M_AXI_ARBURST     = {C_NUM_MASTER_SLOTS{mi_aburst}};                       
    assign M_AXI_ARCACHE     = {C_NUM_MASTER_SLOTS{mi_acache}};                       
    assign M_AXI_ARQOS       = {C_NUM_MASTER_SLOTS{mi_aqos  }};                       
    assign M_AXI_ARUSER      = {C_NUM_MASTER_SLOTS{mi_auser[0+:C_AXI_ARUSER_WIDTH] }};
    
    // W-channel MI handshakes
    assign M_AXI_WVALID = mi_wvalid[0+:C_NUM_MASTER_SLOTS];
    assign mi_wready[0+:C_NUM_MASTER_SLOTS] = M_AXI_WREADY;
    // Broadcast W transfer payload to all MI-slots
    assign M_AXI_WLAST = {C_NUM_MASTER_SLOTS{mi_wlast}};
    assign M_AXI_WUSER = {C_NUM_MASTER_SLOTS{mi_wuser}};
    assign M_AXI_WDATA = {C_NUM_MASTER_SLOTS{mi_wdata}};
    assign M_AXI_WSTRB = {C_NUM_MASTER_SLOTS{mi_wstrb}};
    assign M_AXI_WID =   {C_NUM_MASTER_SLOTS{mi_wid}};
    
    // Broadcast R transfer payload to all SI-slots
    assign S_AXI_RLAST = {C_NUM_SLAVE_SLOTS{si_rlast}};
    assign S_AXI_RRESP = {C_NUM_SLAVE_SLOTS{si_rresp}};
    assign S_AXI_RUSER = {C_NUM_SLAVE_SLOTS{si_ruser}};
    assign S_AXI_RDATA = {C_NUM_SLAVE_SLOTS{si_rdata}};
    assign S_AXI_RID =   {C_NUM_SLAVE_SLOTS{mi_aid}};
    
    // Broadcast B transfer payload to all SI-slots
    assign S_AXI_BRESP = {C_NUM_SLAVE_SLOTS{si_bresp}};
    assign S_AXI_BUSER = {C_NUM_SLAVE_SLOTS{si_buser}};
    assign S_AXI_BID =   {C_NUM_SLAVE_SLOTS{mi_aid}};
    
    if (C_NUM_SLAVE_SLOTS>1) begin : gen_wmux
      // SI WVALID mux.
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      ("rtl"),
         .C_RATIO       (C_NUM_SLAVE_SLOTS),
         .C_SEL_WIDTH   (P_NUM_SLAVE_SLOTS_LOG),
         .C_DATA_WIDTH  (1)
        ) si_w_valid_mux_inst 
        (
         .S   (aa_grant_enc),
         .A   (S_AXI_WVALID),
         .O   (aa_wvalid),
         .OE  (w_transfer_en)
        ); 
      
      // SI W-channel payload mux
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      ("rtl"),
         .C_RATIO       (C_NUM_SLAVE_SLOTS),
         .C_SEL_WIDTH   (P_NUM_SLAVE_SLOTS_LOG),
         .C_DATA_WIDTH  (P_WMESG_WIDTH)
        ) si_w_payload_mux_inst 
        (
         .S   (aa_grant_enc),
         .A   (si_wmesg),
         .O   (mi_wmesg),
         .OE  (1'b1)
        ); 
        
      for (gen_si_slot=0; gen_si_slot<C_NUM_SLAVE_SLOTS; gen_si_slot=gen_si_slot+1) begin : gen_wmesg
        assign si_wmesg[gen_si_slot*P_WMESG_WIDTH+:P_WMESG_WIDTH] = {  // Concatenate from MSB to LSB
          ((C_AXI_PROTOCOL == P_AXI3) ? f_extend_ID(S_AXI_WID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH], gen_si_slot) : 1'b0),
          S_AXI_WUSER[gen_si_slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH],
          S_AXI_WSTRB[gen_si_slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8],
          S_AXI_WDATA[gen_si_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH],
          S_AXI_WLAST[gen_si_slot*1+:1]
        };
      end  // gen_wmesg
      
      assign mi_wlast = mi_wmesg[0];
      assign mi_wdata = mi_wmesg[1 +: C_AXI_DATA_WIDTH];
      assign mi_wstrb = mi_wmesg[1+C_AXI_DATA_WIDTH +: C_AXI_DATA_WIDTH/8];
      assign mi_wuser = mi_wmesg[1+C_AXI_DATA_WIDTH+C_AXI_DATA_WIDTH/8 +: C_AXI_WUSER_WIDTH];
      assign mi_wid =   mi_wmesg[1+C_AXI_DATA_WIDTH+C_AXI_DATA_WIDTH/8+C_AXI_WUSER_WIDTH +: P_AXI_WID_WIDTH];
    end else begin : gen_no_wmux
      assign aa_wvalid = w_transfer_en & S_AXI_WVALID;
      assign mi_wlast  = S_AXI_WLAST;
      assign mi_wdata  = S_AXI_WDATA;
      assign mi_wstrb  = S_AXI_WSTRB;
      assign mi_wuser  = S_AXI_WUSER;
      assign mi_wid =    S_AXI_WID;
    end  // gen_wmux
    
    // Receive RVALID from targeted MI.
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (P_NUM_MASTER_SLOTS_DE),
       .C_SEL_WIDTH   (P_NUM_MASTER_SLOTS_DE_LOG),
       .C_DATA_WIDTH  (1)
      ) mi_rvalid_mux_inst 
      (
       .S   (m_atarget_enc),
       .A   (mi_rvalid),
       .O   (aa_rvalid),
       .OE  (r_transfer_en)
      ); 
      
    // MI R-channel payload mux
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (P_NUM_MASTER_SLOTS_DE),
       .C_SEL_WIDTH   (P_NUM_MASTER_SLOTS_DE_LOG),
       .C_DATA_WIDTH  (P_RMESG_WIDTH)
      ) mi_rmesg_mux_inst 
      (
       .S   (m_atarget_enc),
       .A   (mi_rmesg),
       .O   (aa_rmesg),
       .OE  (1'b1)
      ); 
      
    axi_register_slice_v2_1_19_axic_register_slice #
      (
       .C_FAMILY (C_FAMILY),
       .C_DATA_WIDTH (P_RMESG_WIDTH),
       .C_REG_CONFIG (P_R_REG_CONFIG)
       )
      reg_slice_r
      (
       // System Signals
       .ACLK(ACLK),
       .ARESET(reset),

       // Slave side
       .S_PAYLOAD_DATA(aa_rmesg),
       .S_VALID(aa_rvalid),
       .S_READY(aa_rready),

       // Master side
       .M_PAYLOAD_DATA(sr_rmesg),
       .M_VALID(sr_rvalid),
       .M_READY(sr_rready)
       );

    assign mi_rvalid[0+:C_NUM_MASTER_SLOTS] = M_AXI_RVALID; 
    assign mi_rlast[0+:C_NUM_MASTER_SLOTS] = M_AXI_RLAST; 
    assign mi_rresp[0+:C_NUM_MASTER_SLOTS*2] = M_AXI_RRESP;
    assign mi_ruser[0+:C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH] = M_AXI_RUSER;
    assign mi_rdata[0+:C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH] = M_AXI_RDATA;
    assign M_AXI_RREADY = mi_rready[0+:C_NUM_MASTER_SLOTS];
    
    for (gen_mi_slot=0; gen_mi_slot<P_NUM_MASTER_SLOTS_DE; gen_mi_slot=gen_mi_slot+1) begin : gen_rmesg
      assign mi_rmesg[gen_mi_slot*P_RMESG_WIDTH+:P_RMESG_WIDTH] = {  // Concatenate from MSB to LSB
        mi_ruser[gen_mi_slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH],
        mi_rdata[gen_mi_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH],
        mi_rresp[gen_mi_slot*2+:2],
        mi_rlast[gen_mi_slot*1+:1]
      };
    end  // gen_rmesg
    
    assign si_rlast = sr_rmesg[0];
    assign si_rresp = sr_rmesg[1 +: 2];
    assign si_rdata = sr_rmesg[1+2 +: C_AXI_DATA_WIDTH];
    assign si_ruser = sr_rmesg[1+2+C_AXI_DATA_WIDTH +: C_AXI_RUSER_WIDTH];
      
    // Receive BVALID from targeted MI.
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (P_NUM_MASTER_SLOTS_DE),
       .C_SEL_WIDTH   (P_NUM_MASTER_SLOTS_DE_LOG),
       .C_DATA_WIDTH  (1)
      ) mi_bvalid_mux_inst 
      (
       .S   (m_atarget_enc),
       .A   (mi_bvalid),
       .O   (aa_bvalid),
       .OE  (b_transfer_en)
      ); 
      
    // MI B-channel payload mux
    generic_baseblocks_v2_1_0_mux_enc # 
      (
       .C_FAMILY      ("rtl"),
       .C_RATIO       (P_NUM_MASTER_SLOTS_DE),
       .C_SEL_WIDTH   (P_NUM_MASTER_SLOTS_DE_LOG),
       .C_DATA_WIDTH  (P_BMESG_WIDTH)
      ) mi_bmesg_mux_inst 
      (
       .S   (m_atarget_enc),
       .A   (mi_bmesg),
       .O   (si_bmesg),
       .OE  (1'b1)
      ); 
      
    assign mi_bvalid[0+:C_NUM_MASTER_SLOTS] = M_AXI_BVALID; 
    assign mi_bresp[0+:C_NUM_MASTER_SLOTS*2] = M_AXI_BRESP;
    assign mi_buser[0+:C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH] = M_AXI_BUSER;
    assign M_AXI_BREADY = mi_bready[0+:C_NUM_MASTER_SLOTS];
    
    for (gen_mi_slot=0; gen_mi_slot<P_NUM_MASTER_SLOTS_DE; gen_mi_slot=gen_mi_slot+1) begin : gen_bmesg
      assign mi_bmesg[gen_mi_slot*P_BMESG_WIDTH+:P_BMESG_WIDTH] = {  // Concatenate from MSB to LSB
        mi_buser[gen_mi_slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH],
        mi_bresp[gen_mi_slot*2+:2]
      };
    end  // gen_bmesg
    
    assign si_bresp = si_bmesg[0 +: 2];
    assign si_buser = si_bmesg[2 +: C_AXI_BUSER_WIDTH];
    
    if (C_DEBUG) begin : gen_debug_trans_seq
      // DEBUG WRITE TRANSACTION SEQUENCE COUNTER
      always @(posedge ACLK) begin
        if (reset) begin
          debug_aw_trans_seq_i <= 1;
        end else begin
          if (aa_awvalid && aa_awready) begin
            debug_aw_trans_seq_i <= debug_aw_trans_seq_i + 1;
          end
        end
      end
  
      // DEBUG READ TRANSACTION SEQUENCE COUNTER
      always @(posedge ACLK) begin
        if (reset) begin
          debug_ar_trans_seq_i <= 1;
        end else begin
          if (aa_arvalid && aa_arready) begin
            debug_ar_trans_seq_i <= debug_ar_trans_seq_i + 1;
          end
        end
      end
      
      // DEBUG WRITE BEAT COUNTER 
      always @(posedge ACLK) begin
        if (reset) begin
          debug_w_beat_cnt_i <= 0;
        end else if (aa_wready & aa_wvalid) begin
          if (mi_wlast) begin
            debug_w_beat_cnt_i <= 0;
          end else begin
            debug_w_beat_cnt_i <= debug_w_beat_cnt_i + 1;
          end
        end
      end  // Clocked process
    
      // DEBUG READ BEAT COUNTER 
      always @(posedge ACLK) begin
        if (reset) begin
          debug_r_beat_cnt_i <= 0;
        end else if (sr_rready & sr_rvalid) begin
          if (si_rlast) begin
            debug_r_beat_cnt_i <= 0;
          end else begin
            debug_r_beat_cnt_i <= debug_r_beat_cnt_i + 1;
          end
        end
      end  // Clocked process
    
    end  // gen_debug_trans_seq

    if (C_RANGE_CHECK) begin : gen_decerr
      // Highest MI-slot (index C_NUM_MASTER_SLOTS) is the error handler
      axi_crossbar_v2_1_20_decerr_slave #
        (
         .C_AXI_ID_WIDTH                 (1),
         .C_AXI_DATA_WIDTH               (C_AXI_DATA_WIDTH),
         .C_AXI_RUSER_WIDTH                (C_AXI_RUSER_WIDTH),
         .C_AXI_BUSER_WIDTH                (C_AXI_BUSER_WIDTH),
         .C_AXI_PROTOCOL                 (C_AXI_PROTOCOL),
         .C_RESP                         (P_DECERR) 
        )
        decerr_slave_inst
          (
           .S_AXI_ACLK (ACLK),
           .S_AXI_ARESET (reset),
           .S_AXI_AWID (1'b0),
           .S_AXI_AWVALID (mi_awvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_AWREADY (mi_awready[C_NUM_MASTER_SLOTS]),
           .S_AXI_WLAST (mi_wlast),
           .S_AXI_WVALID (mi_wvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_WREADY (mi_wready[C_NUM_MASTER_SLOTS]),
           .S_AXI_BID (),
           .S_AXI_BRESP (mi_bresp[C_NUM_MASTER_SLOTS*2+:2]),
           .S_AXI_BUSER (mi_buser[C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH]),
           .S_AXI_BVALID (mi_bvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_BREADY (mi_bready[C_NUM_MASTER_SLOTS]),
           .S_AXI_ARID (1'b0),
           .S_AXI_ARLEN (mi_alen),
           .S_AXI_ARVALID (mi_arvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_ARREADY (mi_arready[C_NUM_MASTER_SLOTS]),
           .S_AXI_RID (),
           .S_AXI_RDATA (mi_rdata[C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]),
           .S_AXI_RRESP (mi_rresp[C_NUM_MASTER_SLOTS*2+:2]),
           .S_AXI_RUSER (mi_ruser[C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]),
           .S_AXI_RLAST (mi_rlast[C_NUM_MASTER_SLOTS]),
           .S_AXI_RVALID (mi_rvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_RREADY (mi_rready[C_NUM_MASTER_SLOTS])
         );
    end  // gen_decerr

  endgenerate

endmodule

`default_nettype wire


// -- (c) Copyright 2009 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// File name: crossbar.v
//
// Description: 
//   This module is a M-master to N-slave AXI axi_crossbar_v2_1_20_crossbar switch.
//   The interface of this module consists of a vectored slave and master interface
//     in which all slots are sized and synchronized to the native width and clock 
//     of the interconnect.
//   The SAMD axi_crossbar_v2_1_20_crossbar supports only AXI4 and AXI3 protocols.
//   All width, clock and protocol conversions are done outside this block, as are
//     any pipeline registers or data FIFOs.
//   This module contains all arbitration, decoders and channel multiplexing logic.
//     It also contains the diagnostic registers and control interface.
//
//-----------------------------------------------------------------------------
//
// Structure:
//    crossbar
//      si_transactor
//        addr_decoder
//          comparator_static
//        mux_enc
//        axic_srl_fifo
//        arbiter_resp
//      splitter
//      wdata_router
//        axic_reg_srl_fifo
//      wdata_mux
//        axic_reg_srl_fifo
//        mux_enc
//      addr_decoder
//        comparator_static
//      axic_srl_fifo
//      axi_register_slice
//      addr_arbiter
//        mux_enc
//      decerr_slave
//      
//-----------------------------------------------------------------------------
`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_crossbar #
  (
   parameter         C_FAMILY                       = "none", 
   parameter integer C_NUM_SLAVE_SLOTS              =   1, 
   parameter integer C_NUM_MASTER_SLOTS             =   1, 
   parameter integer C_NUM_ADDR_RANGES              = 1,
   parameter integer C_AXI_ID_WIDTH                   = 1, 
   parameter integer C_AXI_ADDR_WIDTH                 = 32, 
   parameter integer C_AXI_DATA_WIDTH = 32, 
   parameter integer C_AXI_PROTOCOL           = 0, 
   parameter [C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64-1:0] C_M_AXI_BASE_ADDR = {C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64{1'b1}}, 
   parameter [C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64-1:0] C_M_AXI_HIGH_ADDR = {C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64{1'b0}}, 
   parameter [C_NUM_SLAVE_SLOTS*64-1:0] C_S_AXI_BASE_ID = {C_NUM_SLAVE_SLOTS*64{1'b0}},
   parameter [C_NUM_SLAVE_SLOTS*64-1:0] C_S_AXI_HIGH_ID = {C_NUM_SLAVE_SLOTS*64{1'b0}},
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_THREAD_ID_WIDTH = {C_NUM_SLAVE_SLOTS{32'h00000000}}, 
   parameter integer C_AXI_SUPPORTS_USER_SIGNALS = 0,
   parameter integer C_AXI_AWUSER_WIDTH = 1,
   parameter integer C_AXI_ARUSER_WIDTH = 1,
   parameter integer C_AXI_WUSER_WIDTH = 1,
   parameter integer C_AXI_RUSER_WIDTH = 1,
   parameter integer C_AXI_BUSER_WIDTH = 1,
   parameter [C_NUM_SLAVE_SLOTS-1:0] C_S_AXI_SUPPORTS_WRITE           = {C_NUM_SLAVE_SLOTS{1'b1}}, 
   parameter [C_NUM_SLAVE_SLOTS-1:0] C_S_AXI_SUPPORTS_READ            = {C_NUM_SLAVE_SLOTS{1'b1}}, 
   parameter [C_NUM_MASTER_SLOTS-1:0] C_M_AXI_SUPPORTS_WRITE           = {C_NUM_MASTER_SLOTS{1'b1}}, 
   parameter [C_NUM_MASTER_SLOTS-1:0] C_M_AXI_SUPPORTS_READ            = {C_NUM_MASTER_SLOTS{1'b1}}, 
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_WRITE_CONNECTIVITY = {C_NUM_MASTER_SLOTS*32{1'b1}},
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_READ_CONNECTIVITY = {C_NUM_MASTER_SLOTS*32{1'b1}},
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_SINGLE_THREAD                 = {C_NUM_SLAVE_SLOTS{32'h00000000}}, 
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_WRITE_ACCEPTANCE         = {C_NUM_SLAVE_SLOTS{32'h00000001}},
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_READ_ACCEPTANCE          = {C_NUM_SLAVE_SLOTS{32'h00000001}},
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_WRITE_ISSUING            = {C_NUM_MASTER_SLOTS{32'h00000001}},
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_READ_ISSUING            = {C_NUM_MASTER_SLOTS{32'h00000001}},
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_ARB_PRIORITY             = {C_NUM_SLAVE_SLOTS{32'h00000000}},
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_SECURE                   = {C_NUM_MASTER_SLOTS{32'h00000000}},
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_ERR_MODE            = {C_NUM_MASTER_SLOTS{32'h00000000}},
   parameter integer C_RANGE_CHECK                    = 0,
   parameter integer C_ADDR_DECODE                    = 0,
   parameter [(C_NUM_MASTER_SLOTS+1)*32-1:0] C_W_ISSUE_WIDTH  = {C_NUM_MASTER_SLOTS+1{32'h00000000}},
   parameter [(C_NUM_MASTER_SLOTS+1)*32-1:0] C_R_ISSUE_WIDTH  = {C_NUM_MASTER_SLOTS+1{32'h00000000}},
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_W_ACCEPT_WIDTH = {C_NUM_SLAVE_SLOTS{32'h00000000}},
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_R_ACCEPT_WIDTH = {C_NUM_SLAVE_SLOTS{32'h00000000}},
   parameter integer C_DEBUG              = 1
   )
  (
   // Global Signals
   input  wire                                                    ACLK,
   input  wire                                                    ARESETN,
   // Slave Interface Write Address Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_AWID,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]           S_AXI_AWADDR,
   input  wire [C_NUM_SLAVE_SLOTS*8-1:0]                          S_AXI_AWLEN,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          S_AXI_AWSIZE,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_AWBURST,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_AWLOCK,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_AWCACHE,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          S_AXI_AWPROT,
//   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_AWREGION,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_AWQOS,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_AWUSER_WIDTH-1:0]         S_AXI_AWUSER,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_AWVALID,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_AWREADY,
   // Slave Interface Write Data Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_WID,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH-1:0]     S_AXI_WDATA,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH/8-1:0]   S_AXI_WSTRB,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_WLAST,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_WUSER_WIDTH-1:0]          S_AXI_WUSER,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_WVALID,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_WREADY,
   // Slave Interface Write Response Ports
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_BID,
   output wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_BRESP,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_BUSER_WIDTH-1:0]          S_AXI_BUSER,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_BVALID,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_BREADY,
   // Slave Interface Read Address Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_ARID,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]           S_AXI_ARADDR,
   input  wire [C_NUM_SLAVE_SLOTS*8-1:0]                          S_AXI_ARLEN,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          S_AXI_ARSIZE,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_ARBURST,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_ARLOCK,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_ARCACHE,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          S_AXI_ARPROT,
//   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_ARREGION,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          S_AXI_ARQOS,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ARUSER_WIDTH-1:0]         S_AXI_ARUSER,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_ARVALID,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_ARREADY,
   // Slave Interface Read Data Ports
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]           S_AXI_RID,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH-1:0]     S_AXI_RDATA,
   output wire [C_NUM_SLAVE_SLOTS*2-1:0]                          S_AXI_RRESP,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_RLAST,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_RUSER_WIDTH-1:0]          S_AXI_RUSER,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_RVALID,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            S_AXI_RREADY,
   // Master Interface Write Address Port
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_AWID,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ADDR_WIDTH-1:0]          M_AXI_AWADDR,
   output wire [C_NUM_MASTER_SLOTS*8-1:0]                         M_AXI_AWLEN,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         M_AXI_AWSIZE,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_AWBURST,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_AWLOCK,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_AWCACHE,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         M_AXI_AWPROT,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_AWREGION,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_AWQOS,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_AWUSER_WIDTH-1:0]        M_AXI_AWUSER,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_AWVALID,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_AWREADY,
   // Master Interface Write Data Ports
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_WID,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH-1:0]    M_AXI_WDATA,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH/8-1:0]  M_AXI_WSTRB,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_WLAST,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_WUSER_WIDTH-1:0]         M_AXI_WUSER,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_WVALID,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_WREADY,
   // Master Interface Write Response Ports
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_BID,
   input  wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_BRESP,
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH-1:0]         M_AXI_BUSER,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_BVALID,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_BREADY,
   // Master Interface Read Address Port
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_ARID,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ADDR_WIDTH-1:0]          M_AXI_ARADDR,
   output wire [C_NUM_MASTER_SLOTS*8-1:0]                         M_AXI_ARLEN,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         M_AXI_ARSIZE,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_ARBURST,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_ARLOCK,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_ARCACHE,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         M_AXI_ARPROT,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_ARREGION,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         M_AXI_ARQOS,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ARUSER_WIDTH-1:0]        M_AXI_ARUSER,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_ARVALID,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_ARREADY,
   // Master Interface Read Data Ports
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]          M_AXI_RID,
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH-1:0]    M_AXI_RDATA,
   input  wire [C_NUM_MASTER_SLOTS*2-1:0]                         M_AXI_RRESP,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_RLAST,
   input wire [C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH-1:0]         M_AXI_RUSER,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_RVALID,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           M_AXI_RREADY
   );
   
  localparam integer  P_AXI4 = 0;
  localparam integer  P_AXI3 = 1;
  localparam integer  P_AXILITE = 2;
  localparam integer P_WRITE = 0;
  localparam integer P_READ = 1;
  localparam integer P_NUM_MASTER_SLOTS_LOG = f_ceil_log2(C_NUM_MASTER_SLOTS);
  localparam integer P_NUM_SLAVE_SLOTS_LOG = f_ceil_log2((C_NUM_SLAVE_SLOTS>1) ? C_NUM_SLAVE_SLOTS : 2);
  localparam integer P_AXI_WID_WIDTH = (C_AXI_PROTOCOL == P_AXI3) ? C_AXI_ID_WIDTH : 1;
  localparam integer P_ST_AWMESG_WIDTH = 2+4+4 + C_AXI_AWUSER_WIDTH;
  localparam integer P_AA_AWMESG_WIDTH = C_AXI_ID_WIDTH + C_AXI_ADDR_WIDTH + 8+3+2+3+4 + P_ST_AWMESG_WIDTH;
  localparam integer P_ST_ARMESG_WIDTH = 2+4+4 + C_AXI_ARUSER_WIDTH;
  localparam integer P_AA_ARMESG_WIDTH = C_AXI_ID_WIDTH + C_AXI_ADDR_WIDTH + 8+3+2+3+4 + P_ST_ARMESG_WIDTH;
  localparam integer P_ST_BMESG_WIDTH = 2 + C_AXI_BUSER_WIDTH;
  localparam integer P_ST_RMESG_WIDTH = 2 + C_AXI_RUSER_WIDTH + C_AXI_DATA_WIDTH;
  localparam integer P_WR_WMESG_WIDTH = C_AXI_DATA_WIDTH + C_AXI_DATA_WIDTH/8 + C_AXI_WUSER_WIDTH + P_AXI_WID_WIDTH;
  localparam [31:0] P_BYPASS  = 32'h00000000;
  localparam [31:0] P_FWD_REV = 32'h00000001;
  localparam [31:0] P_SIMPLE  = 32'h00000007;
  localparam [(C_NUM_MASTER_SLOTS+1)-1:0] P_M_AXI_SUPPORTS_READ = {1'b1, C_M_AXI_SUPPORTS_READ[0+:C_NUM_MASTER_SLOTS]};
  localparam [(C_NUM_MASTER_SLOTS+1)-1:0] P_M_AXI_SUPPORTS_WRITE = {1'b1, C_M_AXI_SUPPORTS_WRITE[0+:C_NUM_MASTER_SLOTS]};
  localparam [(C_NUM_MASTER_SLOTS+1)*32-1:0] P_M_AXI_WRITE_CONNECTIVITY = {{32{1'b1}}, C_M_AXI_WRITE_CONNECTIVITY[0+:C_NUM_MASTER_SLOTS*32]};
  localparam [(C_NUM_MASTER_SLOTS+1)*32-1:0] P_M_AXI_READ_CONNECTIVITY = {{32{1'b1}}, C_M_AXI_READ_CONNECTIVITY[0+:C_NUM_MASTER_SLOTS*32]};
  localparam [C_NUM_SLAVE_SLOTS*32-1:0] P_S_AXI_WRITE_CONNECTIVITY = f_si_write_connectivity(0);
  localparam [C_NUM_SLAVE_SLOTS*32-1:0] P_S_AXI_READ_CONNECTIVITY = f_si_read_connectivity(0);
  localparam [(C_NUM_MASTER_SLOTS+1)*32-1:0] P_M_AXI_READ_ISSUING = {32'h00000001, C_M_AXI_READ_ISSUING[0+:C_NUM_MASTER_SLOTS*32]};
  localparam [(C_NUM_MASTER_SLOTS+1)*32-1:0] P_M_AXI_WRITE_ISSUING = {32'h00000001, C_M_AXI_WRITE_ISSUING[0+:C_NUM_MASTER_SLOTS*32]};
  localparam P_DECERR = 2'b11;

  //---------------------------------------------------------------------------
  // Functions
  //---------------------------------------------------------------------------
  // Ceiling of log2(x)
  function integer f_ceil_log2
    (
     input integer x
     );
    integer acc;
    begin
      acc=0;
      while ((2**acc) < x)
        acc = acc + 1;
      f_ceil_log2 = acc;
    end
  endfunction

  // Isolate thread bits of input S_ID and add to BASE_ID (RNG00) to form MI-side ID value
  //   only for end-point SI-slots
  function [C_AXI_ID_WIDTH-1:0] f_extend_ID
    (
     input [C_AXI_ID_WIDTH-1:0] s_id,
     input integer slot
     );
    begin
      f_extend_ID = C_S_AXI_BASE_ID[slot*64+:C_AXI_ID_WIDTH] | (s_id & (C_S_AXI_BASE_ID[slot*64+:C_AXI_ID_WIDTH] ^ C_S_AXI_HIGH_ID[slot*64+:C_AXI_ID_WIDTH]));
    end
  endfunction

  // Write connectivity array transposed
  function [C_NUM_SLAVE_SLOTS*32-1:0] f_si_write_connectivity
    (
      input integer null_arg
     );
    integer si_slot;
    integer mi_slot;
    reg  [C_NUM_SLAVE_SLOTS*32-1:0]  result;
    begin
      result = {C_NUM_SLAVE_SLOTS*32{1'b1}};
      for (si_slot=0; si_slot<C_NUM_SLAVE_SLOTS; si_slot=si_slot+1) begin
        for (mi_slot=0; mi_slot<C_NUM_MASTER_SLOTS; mi_slot=mi_slot+1) begin
          result[si_slot*32+mi_slot] = C_M_AXI_WRITE_CONNECTIVITY[mi_slot*32+si_slot];
        end
      end
    f_si_write_connectivity = result;
    end
  endfunction

  // Read connectivity array transposed
  function [C_NUM_SLAVE_SLOTS*32-1:0] f_si_read_connectivity
    (
      input integer null_arg
     );
    integer si_slot;
    integer mi_slot;
    reg  [C_NUM_SLAVE_SLOTS*32-1:0]  result;
    begin
      result = {C_NUM_SLAVE_SLOTS*32{1'b1}};
      for (si_slot=0; si_slot<C_NUM_SLAVE_SLOTS; si_slot=si_slot+1) begin
        for (mi_slot=0; mi_slot<C_NUM_MASTER_SLOTS; mi_slot=mi_slot+1) begin
          result[si_slot*32+mi_slot] = C_M_AXI_READ_CONNECTIVITY[mi_slot*32+si_slot];
        end
      end
    f_si_read_connectivity = result;
    end
  endfunction

  genvar gen_si_slot;
  genvar gen_mi_slot;
  wire [C_NUM_SLAVE_SLOTS*P_ST_AWMESG_WIDTH-1:0]                  si_st_awmesg          ;
  wire [C_NUM_SLAVE_SLOTS*P_ST_AWMESG_WIDTH-1:0]                  st_tmp_awmesg         ;
  wire [C_NUM_SLAVE_SLOTS*P_AA_AWMESG_WIDTH-1:0]                  tmp_aa_awmesg         ;
  wire [P_AA_AWMESG_WIDTH-1:0]                                    aa_mi_awmesg          ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]                     st_aa_awid            ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]                   st_aa_awaddr          ;
  wire [C_NUM_SLAVE_SLOTS*8-1:0]                                  st_aa_awlen           ;
  wire [C_NUM_SLAVE_SLOTS*3-1:0]                                  st_aa_awsize          ;
  wire [C_NUM_SLAVE_SLOTS*2-1:0]                                  st_aa_awlock          ;
  wire [C_NUM_SLAVE_SLOTS*3-1:0]                                  st_aa_awprot          ;
  wire [C_NUM_SLAVE_SLOTS*4-1:0]                                  st_aa_awregion        ;
  wire [C_NUM_SLAVE_SLOTS*8-1:0]                                  st_aa_awerror         ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             st_aa_awtarget_hot    ;
  wire [C_NUM_SLAVE_SLOTS*(P_NUM_MASTER_SLOTS_LOG+1)-1:0]         st_aa_awtarget_enc    ;
  wire [P_NUM_SLAVE_SLOTS_LOG*1-1:0]                              aa_wm_awgrant_enc     ;
  wire [(C_NUM_MASTER_SLOTS+1)-1:0]                               aa_mi_awtarget_hot    ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  st_aa_awvalid_qual    ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  st_ss_awvalid         ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  st_ss_awready         ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  ss_wr_awvalid         ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  ss_wr_awready         ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  ss_aa_awvalid         ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  ss_aa_awready         ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             sa_wm_awvalid         ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             sa_wm_awready         ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_awvalid            ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_awready            ;
  wire                                                            aa_sa_awvalid         ;
  wire                                                            aa_sa_awready         ;
  wire                                                            aa_mi_arready         ;
  wire                                                            mi_awvalid_en         ;
  wire                                                            sa_wm_awvalid_en      ;
  wire                                                            sa_wm_awready_mux     ;
  wire [C_NUM_SLAVE_SLOTS*P_ST_ARMESG_WIDTH-1:0]                  si_st_armesg          ;
  wire [C_NUM_SLAVE_SLOTS*P_ST_ARMESG_WIDTH-1:0]                  st_tmp_armesg         ;
  wire [C_NUM_SLAVE_SLOTS*P_AA_ARMESG_WIDTH-1:0]                  tmp_aa_armesg         ;
  wire [P_AA_ARMESG_WIDTH-1:0]                                    aa_mi_armesg          ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]                     st_aa_arid            ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]                   st_aa_araddr          ;
  wire [C_NUM_SLAVE_SLOTS*8-1:0]                                  st_aa_arlen           ;
  wire [C_NUM_SLAVE_SLOTS*3-1:0]                                  st_aa_arsize          ;
  wire [C_NUM_SLAVE_SLOTS*2-1:0]                                  st_aa_arlock          ;
  wire [C_NUM_SLAVE_SLOTS*3-1:0]                                  st_aa_arprot          ;
  wire [C_NUM_SLAVE_SLOTS*4-1:0]                                  st_aa_arregion        ;
  wire [C_NUM_SLAVE_SLOTS*8-1:0]                                  st_aa_arerror         ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             st_aa_artarget_hot    ;
  wire [C_NUM_SLAVE_SLOTS*(P_NUM_MASTER_SLOTS_LOG+1)-1:0]         st_aa_artarget_enc    ;
  wire [(C_NUM_MASTER_SLOTS+1)-1:0]                               aa_mi_artarget_hot    ;
  wire [P_NUM_SLAVE_SLOTS_LOG*1-1:0]                              aa_mi_argrant_enc     ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  st_aa_arvalid_qual    ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  st_aa_arvalid         ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  st_aa_arready         ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_arvalid            ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_arready            ;
  wire                                                            aa_mi_arvalid         ;
  wire                                                            mi_awready_mux        ;
  wire [C_NUM_SLAVE_SLOTS*P_ST_BMESG_WIDTH-1:0]                   st_si_bmesg           ;
  wire [(C_NUM_MASTER_SLOTS+1)*P_ST_BMESG_WIDTH-1:0]              st_mr_bmesg           ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_ID_WIDTH-1:0]                st_mr_bid             ;
  wire [(C_NUM_MASTER_SLOTS+1)*2-1:0]                             st_mr_bresp           ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_BUSER_WIDTH-1:0]             st_mr_buser           ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             st_mr_bvalid          ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             st_mr_bready          ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             st_tmp_bready         ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             st_tmp_bid_target     ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_NUM_SLAVE_SLOTS-1:0]             tmp_mr_bid_target     ;
  wire [(C_NUM_MASTER_SLOTS+1)*P_NUM_SLAVE_SLOTS_LOG-1:0]         debug_bid_target_i    ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             bid_match             ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_ID_WIDTH-1:0]                mi_bid                ;
  wire [(C_NUM_MASTER_SLOTS+1)*2-1:0]                             mi_bresp              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_BUSER_WIDTH-1:0]             mi_buser              ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_bvalid             ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_bready             ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             bready_carry          ;
  wire [C_NUM_SLAVE_SLOTS*P_ST_RMESG_WIDTH-1:0]                   st_si_rmesg           ;
  wire [(C_NUM_MASTER_SLOTS+1)*P_ST_RMESG_WIDTH-1:0]              st_mr_rmesg           ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_ID_WIDTH-1:0]                st_mr_rid             ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_DATA_WIDTH-1:0]     st_mr_rdata           ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_RUSER_WIDTH-1:0]             st_mr_ruser           ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             st_mr_rlast           ;
  wire [(C_NUM_MASTER_SLOTS+1)*2-1:0]                             st_mr_rresp           ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             st_mr_rvalid          ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             st_mr_rready          ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             st_tmp_rready         ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             st_tmp_rid_target     ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_NUM_SLAVE_SLOTS-1:0]             tmp_mr_rid_target     ;
  wire [(C_NUM_MASTER_SLOTS+1)*P_NUM_SLAVE_SLOTS_LOG-1:0]         debug_rid_target_i    ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             rid_match             ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_ID_WIDTH-1:0]                mi_rid                ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_DATA_WIDTH-1:0]          mi_rdata              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_RUSER_WIDTH-1:0]             mi_ruser              ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_rlast              ;
  wire [(C_NUM_MASTER_SLOTS+1)*2-1:0]                             mi_rresp              ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_rvalid             ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_rready             ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             rready_carry          ;
  wire [C_NUM_SLAVE_SLOTS*P_WR_WMESG_WIDTH-1:0]                   si_wr_wmesg           ;
  wire [C_NUM_SLAVE_SLOTS*P_WR_WMESG_WIDTH-1:0]                   wr_wm_wmesg           ;
  wire [C_NUM_SLAVE_SLOTS*1-1:0]                                  wr_wm_wlast           ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             wr_tmp_wvalid         ;
  wire [C_NUM_SLAVE_SLOTS*(C_NUM_MASTER_SLOTS+1)-1:0]             wr_tmp_wready         ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_NUM_SLAVE_SLOTS-1:0]             tmp_wm_wvalid         ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_NUM_SLAVE_SLOTS-1:0]             tmp_wm_wready         ;
  wire [(C_NUM_MASTER_SLOTS+1)*P_WR_WMESG_WIDTH-1:0]              wm_mr_wmesg              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_DATA_WIDTH-1:0]          wm_mr_wdata              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_DATA_WIDTH/8-1:0]        wm_mr_wstrb              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_ID_WIDTH-1:0]                wm_mr_wid              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_WUSER_WIDTH-1:0]             wm_mr_wuser              ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             wm_mr_wlast              ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             wm_mr_wvalid             ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             wm_mr_wready             ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_DATA_WIDTH-1:0]          mi_wdata              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_DATA_WIDTH/8-1:0]        mi_wstrb              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_WUSER_WIDTH-1:0]             mi_wuser              ;
  wire [(C_NUM_MASTER_SLOTS+1)*C_AXI_ID_WIDTH-1:0]                mi_wid              ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_wlast              ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_wvalid             ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_wready             ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             w_cmd_push            ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             w_cmd_pop             ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             r_cmd_push            ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             r_cmd_pop             ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_awmaxissuing      ;
  wire [(C_NUM_MASTER_SLOTS+1)*1-1:0]                             mi_armaxissuing      ;
  reg  [(C_NUM_MASTER_SLOTS+1)*8-1:0]                             w_issuing_cnt        ;
  reg  [(C_NUM_MASTER_SLOTS+1)*8-1:0]                             r_issuing_cnt        ;
  reg  [8-1:0]                                                    debug_aw_trans_seq_i    ;
  reg  [8-1:0]                                                    debug_ar_trans_seq_i    ;
  wire [(C_NUM_MASTER_SLOTS+1)*8-1:0]                             debug_w_trans_seq_i     ;
  reg  [(C_NUM_MASTER_SLOTS+1)*8-1:0]                             debug_w_beat_cnt_i      ;

  reg aresetn_d = 1'b0; // Reset delay register
  always @(posedge ACLK) begin
    if (~ARESETN) begin
      aresetn_d <= 1'b0;
    end else begin
      aresetn_d <= ARESETN;
    end
  end
  wire reset;
  assign reset = ~aresetn_d;

  generate
    for (gen_si_slot=0; gen_si_slot<C_NUM_SLAVE_SLOTS; gen_si_slot=gen_si_slot+1) begin : gen_slave_slots
      if (C_S_AXI_SUPPORTS_READ[gen_si_slot]) begin : gen_si_read
        axi_crossbar_v2_1_20_si_transactor #  // "ST": SI Transactor (read channel)
          (
           .C_FAMILY                (C_FAMILY),
           .C_SI                    (gen_si_slot),
           .C_DIR                   (P_READ),
           .C_NUM_ADDR_RANGES       (C_NUM_ADDR_RANGES),
           .C_NUM_M                 (C_NUM_MASTER_SLOTS),
           .C_NUM_M_LOG             (P_NUM_MASTER_SLOTS_LOG),
           .C_ACCEPTANCE            (C_S_AXI_READ_ACCEPTANCE[gen_si_slot*32+:32]),
           .C_ACCEPTANCE_LOG        (C_R_ACCEPT_WIDTH[gen_si_slot*32+:32]),
           .C_ID_WIDTH              (C_AXI_ID_WIDTH),
           .C_THREAD_ID_WIDTH       (C_S_AXI_THREAD_ID_WIDTH[gen_si_slot*32+:32]),
           .C_ADDR_WIDTH            (C_AXI_ADDR_WIDTH),
           .C_AMESG_WIDTH           (P_ST_ARMESG_WIDTH),
           .C_RMESG_WIDTH           (P_ST_RMESG_WIDTH),
           .C_BASE_ID               (C_S_AXI_BASE_ID[gen_si_slot*64+:C_AXI_ID_WIDTH]),
           .C_HIGH_ID               (C_S_AXI_HIGH_ID[gen_si_slot*64+:C_AXI_ID_WIDTH]),
           .C_SINGLE_THREAD         (C_S_AXI_SINGLE_THREAD[gen_si_slot*32+:32]),
           .C_BASE_ADDR             (C_M_AXI_BASE_ADDR),
           .C_HIGH_ADDR             (C_M_AXI_HIGH_ADDR),
           .C_TARGET_QUAL           (P_S_AXI_READ_CONNECTIVITY[gen_si_slot*32+:C_NUM_MASTER_SLOTS]),
           .C_M_AXI_SECURE          (C_M_AXI_SECURE),
           .C_RANGE_CHECK           (C_RANGE_CHECK),
           .C_ADDR_DECODE           (C_ADDR_DECODE),
           .C_ERR_MODE              (C_M_AXI_ERR_MODE),
           .C_DEBUG                 (C_DEBUG)
           )
          si_transactor_ar
            (
             .ACLK                  (ACLK),
             .ARESET                (reset),
             .S_AID                 (f_extend_ID(S_AXI_ARID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH], gen_si_slot)),
             .S_AADDR               (S_AXI_ARADDR[gen_si_slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]),
             .S_ALEN                (S_AXI_ARLEN[gen_si_slot*8+:8]),
             .S_ASIZE               (S_AXI_ARSIZE[gen_si_slot*3+:3]),
             .S_ABURST              (S_AXI_ARBURST[gen_si_slot*2+:2]),
             .S_ALOCK               (S_AXI_ARLOCK[gen_si_slot*2+:2]),
             .S_APROT               (S_AXI_ARPROT[gen_si_slot*3+:3]),
//             .S_AREGION             (S_AXI_ARREGION[gen_si_slot*4+:4]),
             .S_AMESG               (si_st_armesg[gen_si_slot*P_ST_ARMESG_WIDTH+:P_ST_ARMESG_WIDTH]),
             .S_AVALID              (S_AXI_ARVALID[gen_si_slot]),
             .S_AREADY              (S_AXI_ARREADY[gen_si_slot]),
             .M_AID                 (st_aa_arid[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),
             .M_AADDR               (st_aa_araddr[gen_si_slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]),
             .M_ALEN                (st_aa_arlen[gen_si_slot*8+:8]),
             .M_ASIZE               (st_aa_arsize[gen_si_slot*3+:3]),
             .M_ALOCK               (st_aa_arlock[gen_si_slot*2+:2]),
             .M_APROT               (st_aa_arprot[gen_si_slot*3+:3]),
             .M_AREGION             (st_aa_arregion[gen_si_slot*4+:4]),
             .M_AMESG               (st_tmp_armesg[gen_si_slot*P_ST_ARMESG_WIDTH+:P_ST_ARMESG_WIDTH]),
             .M_ATARGET_HOT         (st_aa_artarget_hot[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)]),
             .M_ATARGET_ENC         (st_aa_artarget_enc[gen_si_slot*(P_NUM_MASTER_SLOTS_LOG+1)+:(P_NUM_MASTER_SLOTS_LOG+1)]),
             .M_AERROR              (st_aa_arerror[gen_si_slot*8+:8]),
             .M_AVALID_QUAL         (st_aa_arvalid_qual[gen_si_slot]),
             .M_AVALID              (st_aa_arvalid[gen_si_slot]),
             .M_AREADY              (st_aa_arready[gen_si_slot]),
             .S_RID                 (S_AXI_RID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),
             .S_RMESG               (st_si_rmesg[gen_si_slot*P_ST_RMESG_WIDTH+:P_ST_RMESG_WIDTH]),
             .S_RLAST               (S_AXI_RLAST[gen_si_slot]),
             .S_RVALID              (S_AXI_RVALID[gen_si_slot]),
             .S_RREADY              (S_AXI_RREADY[gen_si_slot]),
             .M_RID                 (st_mr_rid),
             .M_RLAST               (st_mr_rlast),
             .M_RMESG               (st_mr_rmesg),
             .M_RVALID              (st_mr_rvalid),
             .M_RREADY              (st_tmp_rready[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)]),
             .M_RTARGET             (st_tmp_rid_target[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)]),
             .DEBUG_A_TRANS_SEQ     (C_DEBUG ? debug_ar_trans_seq_i : 8'h0)
             );
        
        assign si_st_armesg[gen_si_slot*P_ST_ARMESG_WIDTH+:P_ST_ARMESG_WIDTH] = {
          S_AXI_ARUSER[gen_si_slot*C_AXI_ARUSER_WIDTH+:C_AXI_ARUSER_WIDTH],
          S_AXI_ARQOS[gen_si_slot*4+:4],
          S_AXI_ARCACHE[gen_si_slot*4+:4],
          S_AXI_ARBURST[gen_si_slot*2+:2]
          };
        assign tmp_aa_armesg[gen_si_slot*P_AA_ARMESG_WIDTH+:P_AA_ARMESG_WIDTH] = {
          st_tmp_armesg[gen_si_slot*P_ST_ARMESG_WIDTH+:P_ST_ARMESG_WIDTH],
          st_aa_arregion[gen_si_slot*4+:4],
          st_aa_arprot[gen_si_slot*3+:3],
          st_aa_arlock[gen_si_slot*2+:2],
          st_aa_arsize[gen_si_slot*3+:3],
          st_aa_arlen[gen_si_slot*8+:8],
          st_aa_araddr[gen_si_slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH],
          st_aa_arid[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]
          };
        assign S_AXI_RRESP[gen_si_slot*2+:2] = st_si_rmesg[gen_si_slot*P_ST_RMESG_WIDTH+:2];
        assign S_AXI_RUSER[gen_si_slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH] = st_si_rmesg[gen_si_slot*P_ST_RMESG_WIDTH+2 +: C_AXI_RUSER_WIDTH];
        assign S_AXI_RDATA[gen_si_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH] = st_si_rmesg[gen_si_slot*P_ST_RMESG_WIDTH+2+C_AXI_RUSER_WIDTH +: C_AXI_DATA_WIDTH];
      end else begin : gen_no_si_read
        assign S_AXI_ARREADY[gen_si_slot] = 1'b0;
        assign st_aa_arvalid[gen_si_slot] = 1'b0;
        assign st_aa_arvalid_qual[gen_si_slot] = 1'b1;
        assign tmp_aa_armesg[gen_si_slot*P_AA_ARMESG_WIDTH+:P_AA_ARMESG_WIDTH] = 0;
        assign S_AXI_RID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] = 0;
        assign S_AXI_RRESP[gen_si_slot*2+:2] = 0;
        assign S_AXI_RUSER[gen_si_slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH] = 0;
        //assign S_AXI_RDATA[gen_si_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH] = 0;
        assign S_AXI_RDATA[gen_si_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH] = {C_AXI_DATA_WIDTH/32{32'hDEC0_DE1C}};
        assign S_AXI_RVALID[gen_si_slot] = 1'b0;
        assign S_AXI_RLAST[gen_si_slot] = 1'b0;
        assign st_tmp_rready[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)] = 0;
        assign st_aa_artarget_hot[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)] = 0;
      end  // gen_si_read
        
      if (C_S_AXI_SUPPORTS_WRITE[gen_si_slot]) begin : gen_si_write
        axi_crossbar_v2_1_20_si_transactor #  // "ST": SI Transactor (write channel)
          (
           .C_FAMILY                (C_FAMILY),
           .C_SI                    (gen_si_slot),
           .C_DIR                   (P_WRITE),
           .C_NUM_ADDR_RANGES       (C_NUM_ADDR_RANGES),
           .C_NUM_M                 (C_NUM_MASTER_SLOTS),
           .C_NUM_M_LOG             (P_NUM_MASTER_SLOTS_LOG),
           .C_ACCEPTANCE            (C_S_AXI_WRITE_ACCEPTANCE[gen_si_slot*32+:32]),
           .C_ACCEPTANCE_LOG        (C_W_ACCEPT_WIDTH[gen_si_slot*32+:32]),
           .C_ID_WIDTH              (C_AXI_ID_WIDTH),
           .C_THREAD_ID_WIDTH       (C_S_AXI_THREAD_ID_WIDTH[gen_si_slot*32+:32]),
           .C_ADDR_WIDTH            (C_AXI_ADDR_WIDTH),
           .C_AMESG_WIDTH           (P_ST_AWMESG_WIDTH),
           .C_RMESG_WIDTH           (P_ST_BMESG_WIDTH),
           .C_BASE_ID               (C_S_AXI_BASE_ID[gen_si_slot*64+:C_AXI_ID_WIDTH]),
           .C_HIGH_ID               (C_S_AXI_HIGH_ID[gen_si_slot*64+:C_AXI_ID_WIDTH]),
           .C_SINGLE_THREAD         (C_S_AXI_SINGLE_THREAD[gen_si_slot*32+:32]),
           .C_BASE_ADDR             (C_M_AXI_BASE_ADDR),
           .C_HIGH_ADDR             (C_M_AXI_HIGH_ADDR),
           .C_TARGET_QUAL           (P_S_AXI_WRITE_CONNECTIVITY[gen_si_slot*32+:C_NUM_MASTER_SLOTS]),
           .C_M_AXI_SECURE          (C_M_AXI_SECURE),
           .C_RANGE_CHECK           (C_RANGE_CHECK),
           .C_ADDR_DECODE           (C_ADDR_DECODE),
           .C_ERR_MODE              (C_M_AXI_ERR_MODE),
           .C_DEBUG                 (C_DEBUG)
           )
          si_transactor_aw
            (
             .ACLK                  (ACLK),
             .ARESET                (reset),
             .S_AID                 (f_extend_ID(S_AXI_AWID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH], gen_si_slot)),
             .S_AADDR               (S_AXI_AWADDR[gen_si_slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]),
             .S_ALEN                (S_AXI_AWLEN[gen_si_slot*8+:8]),
             .S_ASIZE               (S_AXI_AWSIZE[gen_si_slot*3+:3]),
             .S_ABURST              (S_AXI_AWBURST[gen_si_slot*2+:2]),
             .S_ALOCK               (S_AXI_AWLOCK[gen_si_slot*2+:2]),
             .S_APROT               (S_AXI_AWPROT[gen_si_slot*3+:3]),
//             .S_AREGION             (S_AXI_AWREGION[gen_si_slot*4+:4]),
             .S_AMESG               (si_st_awmesg[gen_si_slot*P_ST_AWMESG_WIDTH+:P_ST_AWMESG_WIDTH]),
             .S_AVALID              (S_AXI_AWVALID[gen_si_slot]),
             .S_AREADY              (S_AXI_AWREADY[gen_si_slot]),
             .M_AID                 (st_aa_awid[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),
             .M_AADDR               (st_aa_awaddr[gen_si_slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]),
             .M_ALEN                (st_aa_awlen[gen_si_slot*8+:8]),
             .M_ASIZE               (st_aa_awsize[gen_si_slot*3+:3]),
             .M_ALOCK               (st_aa_awlock[gen_si_slot*2+:2]),
             .M_APROT               (st_aa_awprot[gen_si_slot*3+:3]),
             .M_AREGION             (st_aa_awregion[gen_si_slot*4+:4]),
             .M_AMESG               (st_tmp_awmesg[gen_si_slot*P_ST_AWMESG_WIDTH+:P_ST_AWMESG_WIDTH]),
             .M_ATARGET_HOT         (st_aa_awtarget_hot[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)]),
             .M_ATARGET_ENC         (st_aa_awtarget_enc[gen_si_slot*(P_NUM_MASTER_SLOTS_LOG+1)+:(P_NUM_MASTER_SLOTS_LOG+1)]),
             .M_AERROR              (st_aa_awerror[gen_si_slot*8+:8]),
             .M_AVALID_QUAL         (st_aa_awvalid_qual[gen_si_slot]),
             .M_AVALID              (st_ss_awvalid[gen_si_slot]),
             .M_AREADY              (st_ss_awready[gen_si_slot]),
             .S_RID                 (S_AXI_BID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),
             .S_RMESG               (st_si_bmesg[gen_si_slot*P_ST_BMESG_WIDTH+:P_ST_BMESG_WIDTH]),
             .S_RLAST               (),
             .S_RVALID              (S_AXI_BVALID[gen_si_slot]),
             .S_RREADY              (S_AXI_BREADY[gen_si_slot]),
             .M_RID                 (st_mr_bid),
             .M_RLAST               ({(C_NUM_MASTER_SLOTS+1){1'b1}}),
             .M_RMESG               (st_mr_bmesg),
             .M_RVALID              (st_mr_bvalid),
             .M_RREADY              (st_tmp_bready[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)]),
             .M_RTARGET             (st_tmp_bid_target[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)]),
             .DEBUG_A_TRANS_SEQ     (C_DEBUG ? debug_aw_trans_seq_i : 8'h0)
             );
        
        // Note: Concatenation of mesg signals is from MSB to LSB; assignments that chop mesg signals appear in opposite order.
        assign si_st_awmesg[gen_si_slot*P_ST_AWMESG_WIDTH+:P_ST_AWMESG_WIDTH] = {
          S_AXI_AWUSER[gen_si_slot*C_AXI_AWUSER_WIDTH+:C_AXI_AWUSER_WIDTH],
          S_AXI_AWQOS[gen_si_slot*4+:4],
          S_AXI_AWCACHE[gen_si_slot*4+:4],
          S_AXI_AWBURST[gen_si_slot*2+:2]
          };
        assign tmp_aa_awmesg[gen_si_slot*P_AA_AWMESG_WIDTH+:P_AA_AWMESG_WIDTH] = {
          st_tmp_awmesg[gen_si_slot*P_ST_AWMESG_WIDTH+:P_ST_AWMESG_WIDTH],
          st_aa_awregion[gen_si_slot*4+:4],
          st_aa_awprot[gen_si_slot*3+:3],
          st_aa_awlock[gen_si_slot*2+:2],
          st_aa_awsize[gen_si_slot*3+:3],
          st_aa_awlen[gen_si_slot*8+:8],
          st_aa_awaddr[gen_si_slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH],
          st_aa_awid[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]
          };
        assign S_AXI_BRESP[gen_si_slot*2+:2] = st_si_bmesg[gen_si_slot*P_ST_BMESG_WIDTH+:2];
        assign S_AXI_BUSER[gen_si_slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH] = st_si_bmesg[gen_si_slot*P_ST_BMESG_WIDTH+2 +: C_AXI_BUSER_WIDTH];
                       
        // AW SI-transactor transfer completes upon completion of both W-router address acceptance (command push) and AW arbitration
        axi_crossbar_v2_1_20_splitter #  // "SS": Splitter from SI-Transactor (write channel)
          (
            .C_NUM_M                (2)
          )
          splitter_aw_si
          (
             .ACLK                  (ACLK),
             .ARESET                (reset),
             .S_VALID              (st_ss_awvalid[gen_si_slot]),
             .S_READY              (st_ss_awready[gen_si_slot]),
             .M_VALID              ({ss_wr_awvalid[gen_si_slot], ss_aa_awvalid[gen_si_slot]}),
             .M_READY              ({ss_wr_awready[gen_si_slot], ss_aa_awready[gen_si_slot]})
          );
      
        axi_crossbar_v2_1_20_wdata_router #  // "WR": Write data Router
          (
           .C_FAMILY                   (C_FAMILY),
           .C_NUM_MASTER_SLOTS         (C_NUM_MASTER_SLOTS+1),
           .C_SELECT_WIDTH             (P_NUM_MASTER_SLOTS_LOG+1),
           .C_WMESG_WIDTH               (P_WR_WMESG_WIDTH),
           .C_FIFO_DEPTH_LOG           (C_W_ACCEPT_WIDTH[gen_si_slot*32+:6])
           )
          wdata_router_w
            (
             .ACLK    (ACLK),
             .ARESET  (reset),
             // Write transfer input from the current SI-slot
             .S_WMESG  (si_wr_wmesg[gen_si_slot*P_WR_WMESG_WIDTH+:P_WR_WMESG_WIDTH]),
             .S_WLAST  (S_AXI_WLAST[gen_si_slot]),
             .S_WVALID (S_AXI_WVALID[gen_si_slot]),
             .S_WREADY (S_AXI_WREADY[gen_si_slot]),
             // Vector of write transfer outputs to each MI-slot's W-mux
             .M_WMESG  (wr_wm_wmesg[gen_si_slot*(P_WR_WMESG_WIDTH)+:P_WR_WMESG_WIDTH]),
             .M_WLAST  (wr_wm_wlast[gen_si_slot]),
             .M_WVALID (wr_tmp_wvalid[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)]),
             .M_WREADY (wr_tmp_wready[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)]),
             // AW command push from local SI-slot
             .S_ASELECT (st_aa_awtarget_enc[gen_si_slot*(P_NUM_MASTER_SLOTS_LOG+1)+:(P_NUM_MASTER_SLOTS_LOG+1)]),  // Target MI-slot
             .S_AVALID  (ss_wr_awvalid[gen_si_slot]),
             .S_AREADY  (ss_wr_awready[gen_si_slot])
             );
             
        assign si_wr_wmesg[gen_si_slot*P_WR_WMESG_WIDTH+:P_WR_WMESG_WIDTH] = {
          ((C_AXI_PROTOCOL == P_AXI3) ? f_extend_ID(S_AXI_WID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH], gen_si_slot) : 1'b0),
          S_AXI_WUSER[gen_si_slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH],
          S_AXI_WSTRB[gen_si_slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8],
          S_AXI_WDATA[gen_si_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]
        };        
      end else begin : gen_no_si_write
        assign S_AXI_AWREADY[gen_si_slot] = 1'b0;
        assign ss_aa_awvalid[gen_si_slot] = 1'b0;
        assign st_aa_awvalid_qual[gen_si_slot] = 1'b1;
        assign tmp_aa_awmesg[gen_si_slot*P_AA_AWMESG_WIDTH+:P_AA_AWMESG_WIDTH] = 0;
        assign S_AXI_BID[gen_si_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] = 0;
        assign S_AXI_BRESP[gen_si_slot*2+:2] = 0;
        assign S_AXI_BUSER[gen_si_slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH] = 0;
        assign S_AXI_BVALID[gen_si_slot] = 1'b0;
        assign st_tmp_bready[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)] = 0;
        assign S_AXI_WREADY[gen_si_slot] = 1'b0;
        assign wr_wm_wmesg[gen_si_slot*(P_WR_WMESG_WIDTH)+:P_WR_WMESG_WIDTH] = 0;
        assign wr_wm_wlast[gen_si_slot] = 1'b0;
        assign wr_tmp_wvalid[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)] = 0;
        assign st_aa_awtarget_hot[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+:(C_NUM_MASTER_SLOTS+1)] = 0;
      end  // gen_si_write
    end  // gen_slave_slots
    
    for (gen_mi_slot=0; gen_mi_slot<C_NUM_MASTER_SLOTS+1; gen_mi_slot=gen_mi_slot+1) begin : gen_master_slots
      if (P_M_AXI_SUPPORTS_READ[gen_mi_slot]) begin : gen_mi_read
        if (C_NUM_SLAVE_SLOTS>1) begin : gen_rid_decoder
          axi_crossbar_v2_1_20_addr_decoder #
            (
              .C_FAMILY          (C_FAMILY),
              .C_NUM_TARGETS     (C_NUM_SLAVE_SLOTS),
              .C_NUM_TARGETS_LOG (P_NUM_SLAVE_SLOTS_LOG),
              .C_NUM_RANGES      (1),
              .C_ADDR_WIDTH      (C_AXI_ID_WIDTH),
              .C_TARGET_ENC      (C_DEBUG),
              .C_TARGET_HOT      (1),
              .C_REGION_ENC      (0),
              .C_BASE_ADDR       (C_S_AXI_BASE_ID),
              .C_HIGH_ADDR       (C_S_AXI_HIGH_ID),
              .C_TARGET_QUAL     (P_M_AXI_READ_CONNECTIVITY[gen_mi_slot*32+:C_NUM_SLAVE_SLOTS]),
              .C_RESOLUTION      (0)
            ) 
            rid_decoder_inst 
            (
              .ADDR             (st_mr_rid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),        
              .TARGET_HOT       (tmp_mr_rid_target[gen_mi_slot*C_NUM_SLAVE_SLOTS+:C_NUM_SLAVE_SLOTS]),  
              .TARGET_ENC       (debug_rid_target_i[gen_mi_slot*P_NUM_SLAVE_SLOTS_LOG+:P_NUM_SLAVE_SLOTS_LOG]),  
              .MATCH            (rid_match[gen_mi_slot]),       
              .REGION           ()      
            );
        end else begin : gen_no_rid_decoder
          assign tmp_mr_rid_target[gen_mi_slot] = 1'b1;  // All response transfers route to solo SI-slot.
          assign rid_match[gen_mi_slot] = 1'b1;
        end
        
        assign st_mr_rmesg[gen_mi_slot*P_ST_RMESG_WIDTH+:P_ST_RMESG_WIDTH] = {
          st_mr_rdata[gen_mi_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH],
          st_mr_ruser[gen_mi_slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH], 
          st_mr_rresp[gen_mi_slot*2+:2]
          }; 
      end else begin : gen_no_mi_read
        assign tmp_mr_rid_target[gen_mi_slot*C_NUM_SLAVE_SLOTS+:C_NUM_SLAVE_SLOTS] = 0;
        assign rid_match[gen_mi_slot] = 1'b0;
        assign st_mr_rmesg[gen_mi_slot*P_ST_RMESG_WIDTH+:P_ST_RMESG_WIDTH] = 0;
      end  // gen_mi_read
      
      if (P_M_AXI_SUPPORTS_WRITE[gen_mi_slot]) begin : gen_mi_write
        if (C_NUM_SLAVE_SLOTS>1) begin : gen_bid_decoder
          axi_crossbar_v2_1_20_addr_decoder #
            (
              .C_FAMILY          (C_FAMILY),
              .C_NUM_TARGETS     (C_NUM_SLAVE_SLOTS),
              .C_NUM_TARGETS_LOG (P_NUM_SLAVE_SLOTS_LOG),
              .C_NUM_RANGES      (1),
              .C_ADDR_WIDTH      (C_AXI_ID_WIDTH),
              .C_TARGET_ENC      (C_DEBUG),
              .C_TARGET_HOT      (1),
              .C_REGION_ENC      (0),
              .C_BASE_ADDR       (C_S_AXI_BASE_ID),
              .C_HIGH_ADDR       (C_S_AXI_HIGH_ID),
              .C_TARGET_QUAL     (P_M_AXI_WRITE_CONNECTIVITY[gen_mi_slot*32+:C_NUM_SLAVE_SLOTS]),
              .C_RESOLUTION      (0)
            ) 
            bid_decoder_inst 
            (
              .ADDR             (st_mr_bid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),        
              .TARGET_HOT       (tmp_mr_bid_target[gen_mi_slot*C_NUM_SLAVE_SLOTS+:C_NUM_SLAVE_SLOTS]),  
              .TARGET_ENC       (debug_bid_target_i[gen_mi_slot*P_NUM_SLAVE_SLOTS_LOG+:P_NUM_SLAVE_SLOTS_LOG]),  
              .MATCH            (bid_match[gen_mi_slot]),       
              .REGION           ()      
            );
        end else begin : gen_no_bid_decoder
          assign tmp_mr_bid_target[gen_mi_slot] = 1'b1;  // All response transfers route to solo SI-slot.
          assign bid_match[gen_mi_slot] = 1'b1;
        end
      
        axi_crossbar_v2_1_20_wdata_mux #  // "WM": Write data Mux, per MI-slot (incl error-handler)
          (
           .C_FAMILY                   (C_FAMILY),
           .C_NUM_SLAVE_SLOTS         (C_NUM_SLAVE_SLOTS),
           .C_SELECT_WIDTH     (P_NUM_SLAVE_SLOTS_LOG),
           .C_WMESG_WIDTH               (P_WR_WMESG_WIDTH),
           .C_FIFO_DEPTH_LOG           (C_W_ISSUE_WIDTH[gen_mi_slot*32+:6])
           )
          wdata_mux_w
            (
             .ACLK    (ACLK),
             .ARESET  (reset),
             // Vector of write transfer inputs from each SI-slot's W-router
             .S_WMESG  (wr_wm_wmesg),
             .S_WLAST  (wr_wm_wlast),
             .S_WVALID (tmp_wm_wvalid[gen_mi_slot*C_NUM_SLAVE_SLOTS+:C_NUM_SLAVE_SLOTS]),
             .S_WREADY (tmp_wm_wready[gen_mi_slot*C_NUM_SLAVE_SLOTS+:C_NUM_SLAVE_SLOTS]),
             // Write transfer output to the current MI-slot
             .M_WMESG  (wm_mr_wmesg[gen_mi_slot*P_WR_WMESG_WIDTH+:P_WR_WMESG_WIDTH]),
             .M_WLAST  (wm_mr_wlast[gen_mi_slot]),
             .M_WVALID (wm_mr_wvalid[gen_mi_slot]),
             .M_WREADY (wm_mr_wready[gen_mi_slot]),
             // AW command push from AW arbiter output
             .S_ASELECT (aa_wm_awgrant_enc),  // SI-slot selected by arbiter
             .S_AVALID  (sa_wm_awvalid[gen_mi_slot]),
             .S_AREADY  (sa_wm_awready[gen_mi_slot])
             );
             
        if (C_DEBUG) begin : gen_debug_w
          // DEBUG WRITE BEAT COUNTER
          always @(posedge ACLK) begin
            if (reset) begin
              debug_w_beat_cnt_i[gen_mi_slot*8+:8] <= 0;
            end else begin
              if (mi_wvalid[gen_mi_slot] & mi_wready[gen_mi_slot]) begin
                if (mi_wlast[gen_mi_slot]) begin
                  debug_w_beat_cnt_i[gen_mi_slot*8+:8] <= 0;
                end else begin
                  debug_w_beat_cnt_i[gen_mi_slot*8+:8] <= debug_w_beat_cnt_i[gen_mi_slot*8+:8] + 1;
                end
              end
            end
          end  // clocked process
  
          // DEBUG W-CHANNEL TRANSACTION SEQUENCE QUEUE
          axi_data_fifo_v2_1_18_axic_srl_fifo #
            (
             .C_FAMILY          (C_FAMILY),
             .C_FIFO_WIDTH      (8),
             .C_FIFO_DEPTH_LOG  (C_W_ISSUE_WIDTH[gen_mi_slot*32+:6]),
             .C_USE_FULL        (0)
             )
            debug_w_seq_fifo
              (
               .ACLK    (ACLK),
               .ARESET  (reset),
               .S_MESG  (debug_aw_trans_seq_i),
               .S_VALID (sa_wm_awvalid[gen_mi_slot]),
               .S_READY (),
               .M_MESG  (debug_w_trans_seq_i[gen_mi_slot*8+:8]),
               .M_VALID (),
               .M_READY (mi_wvalid[gen_mi_slot] & mi_wready[gen_mi_slot] & mi_wlast[gen_mi_slot])
              );
        end  // gen_debug_w
             
        assign wm_mr_wdata[gen_mi_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH] = wm_mr_wmesg[gen_mi_slot*P_WR_WMESG_WIDTH +: C_AXI_DATA_WIDTH];
        assign wm_mr_wstrb[gen_mi_slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8] = wm_mr_wmesg[gen_mi_slot*P_WR_WMESG_WIDTH+C_AXI_DATA_WIDTH +: C_AXI_DATA_WIDTH/8];
        assign wm_mr_wuser[gen_mi_slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH] = wm_mr_wmesg[gen_mi_slot*P_WR_WMESG_WIDTH+C_AXI_DATA_WIDTH+C_AXI_DATA_WIDTH/8 +: C_AXI_WUSER_WIDTH];
        assign wm_mr_wid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] = wm_mr_wmesg[gen_mi_slot*P_WR_WMESG_WIDTH+C_AXI_DATA_WIDTH+(C_AXI_DATA_WIDTH/8)+C_AXI_WUSER_WIDTH +: P_AXI_WID_WIDTH];
        assign st_mr_bmesg[gen_mi_slot*P_ST_BMESG_WIDTH+:P_ST_BMESG_WIDTH] = {
          st_mr_buser[gen_mi_slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH],
          st_mr_bresp[gen_mi_slot*2+:2]
          }; 
      end else begin : gen_no_mi_write
        assign tmp_mr_bid_target[gen_mi_slot*C_NUM_SLAVE_SLOTS+:C_NUM_SLAVE_SLOTS] = 0;
        assign bid_match[gen_mi_slot] = 1'b0;
        assign wm_mr_wvalid[gen_mi_slot] = 0;
        assign wm_mr_wlast[gen_mi_slot] = 0;
        assign wm_mr_wdata[gen_mi_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH] = 0;
        assign wm_mr_wstrb[gen_mi_slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8] = 0;
        assign wm_mr_wuser[gen_mi_slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH] = 0;
        assign wm_mr_wid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] = 0;
        assign st_mr_bmesg[gen_mi_slot*P_ST_BMESG_WIDTH+:P_ST_BMESG_WIDTH] = 0;
        assign tmp_wm_wready[gen_mi_slot*C_NUM_SLAVE_SLOTS+:C_NUM_SLAVE_SLOTS] = 0;
        assign sa_wm_awready[gen_mi_slot] = 0;
      end  // gen_mi_write
      
      for (gen_si_slot=0; gen_si_slot<C_NUM_SLAVE_SLOTS; gen_si_slot=gen_si_slot+1) begin : gen_trans_si
        // Transpose handshakes from W-router (SxM) to W-mux (MxS).
        assign tmp_wm_wvalid[gen_mi_slot*C_NUM_SLAVE_SLOTS+gen_si_slot] = wr_tmp_wvalid[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot];
        assign wr_tmp_wready[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot] = tmp_wm_wready[gen_mi_slot*C_NUM_SLAVE_SLOTS+gen_si_slot];
        // Transpose response enables from ID decoders (MxS) to si_transactors (SxM).
        assign st_tmp_bid_target[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot] = tmp_mr_bid_target[gen_mi_slot*C_NUM_SLAVE_SLOTS+gen_si_slot];
        assign st_tmp_rid_target[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot] = tmp_mr_rid_target[gen_mi_slot*C_NUM_SLAVE_SLOTS+gen_si_slot];
      end  // gen_trans_si
      
      assign bready_carry[gen_mi_slot] =  st_tmp_bready[gen_mi_slot];
      assign rready_carry[gen_mi_slot] =  st_tmp_rready[gen_mi_slot];
      for (gen_si_slot=1; gen_si_slot<C_NUM_SLAVE_SLOTS; gen_si_slot=gen_si_slot+1) begin : gen_resp_carry_si
        assign bready_carry[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot] =  // Generate M_BREADY if ...
          bready_carry[(gen_si_slot-1)*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot] |  // For any SI-slot (OR carry-chain across all SI-slots), ...
          st_tmp_bready[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot];  // The write SI transactor indicates BREADY for that MI-slot.
        assign rready_carry[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot] =  // Generate M_RREADY if ...
          rready_carry[(gen_si_slot-1)*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot] |  // For any SI-slot (OR carry-chain across all SI-slots), ...
          st_tmp_rready[gen_si_slot*(C_NUM_MASTER_SLOTS+1)+gen_mi_slot];  // The write SI transactor indicates RREADY for that MI-slot.
      end  // gen_resp_carry_si
           
      assign w_cmd_push[gen_mi_slot] = mi_awvalid[gen_mi_slot] && mi_awready[gen_mi_slot] && P_M_AXI_SUPPORTS_WRITE[gen_mi_slot];
      assign r_cmd_push[gen_mi_slot] = mi_arvalid[gen_mi_slot] && mi_arready[gen_mi_slot] && P_M_AXI_SUPPORTS_READ[gen_mi_slot];
      assign w_cmd_pop[gen_mi_slot] = st_mr_bvalid[gen_mi_slot] && st_mr_bready[gen_mi_slot] && P_M_AXI_SUPPORTS_WRITE[gen_mi_slot];
      assign r_cmd_pop[gen_mi_slot] = st_mr_rvalid[gen_mi_slot] && st_mr_rready[gen_mi_slot] && st_mr_rlast[gen_mi_slot] && P_M_AXI_SUPPORTS_READ[gen_mi_slot];
      // Disqualify arbitration of SI-slot if targeted MI-slot has reached its issuing limit.
      assign mi_awmaxissuing[gen_mi_slot] = (w_issuing_cnt[gen_mi_slot*8 +: (C_W_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] == 
          P_M_AXI_WRITE_ISSUING[gen_mi_slot*32 +: (C_W_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)]) & ~w_cmd_pop[gen_mi_slot];
      assign mi_armaxissuing[gen_mi_slot] = (r_issuing_cnt[gen_mi_slot*8 +: (C_R_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] == 
          P_M_AXI_READ_ISSUING[gen_mi_slot*32 +: (C_R_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)]) & ~r_cmd_pop[gen_mi_slot];
      
      always @(posedge ACLK) begin
        if (reset) begin
          w_issuing_cnt[gen_mi_slot*8+:8] <= 0;  // Some high-order bits remain constant 0
          r_issuing_cnt[gen_mi_slot*8+:8] <= 0;  // Some high-order bits remain constant 0
        end else begin
          if (w_cmd_push[gen_mi_slot] && ~w_cmd_pop[gen_mi_slot]) begin
            w_issuing_cnt[gen_mi_slot*8+:(C_W_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] <= w_issuing_cnt[gen_mi_slot*8+:(C_W_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] + 1;
          end else if (w_cmd_pop[gen_mi_slot] && ~w_cmd_push[gen_mi_slot] && (|w_issuing_cnt[gen_mi_slot*8+:(C_W_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)])) begin
            w_issuing_cnt[gen_mi_slot*8+:(C_W_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] <= w_issuing_cnt[gen_mi_slot*8+:(C_W_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] - 1;
          end
          if (r_cmd_push[gen_mi_slot] && ~r_cmd_pop[gen_mi_slot]) begin
            r_issuing_cnt[gen_mi_slot*8+:(C_R_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] <= r_issuing_cnt[gen_mi_slot*8+:(C_R_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] + 1;
          end else if (r_cmd_pop[gen_mi_slot] && ~r_cmd_push[gen_mi_slot] && (|r_issuing_cnt[gen_mi_slot*8+:(C_R_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)])) begin
            r_issuing_cnt[gen_mi_slot*8+:(C_R_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] <= r_issuing_cnt[gen_mi_slot*8+:(C_R_ISSUE_WIDTH[gen_mi_slot*32+:6]+1)] - 1;
          end
        end
      end  // Clocked process
      
      // Reg-slice must break combinatorial path from M_BID and M_RID inputs to M_BREADY and M_RREADY outputs.
      //   (See m_rready_i and m_resp_en combinatorial assignments in si_transactor.)
      //   Reg-slice incurs +1 latency, but no bubble-cycles.
      axi_register_slice_v2_1_19_axi_register_slice #  // "MR": MI-side R/B-channel Reg-slice, per MI-slot (pass-through if only 1 SI-slot configured)
        (
          .C_FAMILY                         (C_FAMILY),
          .C_AXI_PROTOCOL                   ((C_AXI_PROTOCOL == P_AXI3) ? P_AXI3 : P_AXI4),
          .C_AXI_ID_WIDTH                   (C_AXI_ID_WIDTH),
          .C_AXI_ADDR_WIDTH                 (1),
          .C_AXI_DATA_WIDTH                 (C_AXI_DATA_WIDTH),
          .C_AXI_SUPPORTS_USER_SIGNALS      (C_AXI_SUPPORTS_USER_SIGNALS),
          .C_AXI_AWUSER_WIDTH               (1),
          .C_AXI_ARUSER_WIDTH               (1),
          .C_AXI_WUSER_WIDTH                (C_AXI_WUSER_WIDTH),
          .C_AXI_RUSER_WIDTH                (C_AXI_RUSER_WIDTH),
          .C_AXI_BUSER_WIDTH                (C_AXI_BUSER_WIDTH),
          .C_REG_CONFIG_AW                  (P_BYPASS),
          .C_REG_CONFIG_AR                  (P_BYPASS),
          .C_REG_CONFIG_W                   (P_BYPASS),
          .C_REG_CONFIG_R                   (P_M_AXI_SUPPORTS_READ[gen_mi_slot] ? P_FWD_REV : P_BYPASS),
          .C_REG_CONFIG_B                   (P_M_AXI_SUPPORTS_WRITE[gen_mi_slot] ? P_SIMPLE : P_BYPASS)
        )
        reg_slice_mi 
        (
          .aresetn                          (ARESETN),
          .aclk                             (ACLK),
          .s_axi_awid                       ({C_AXI_ID_WIDTH{1'b0}}),
          .s_axi_awaddr                     ({1{1'b0}}),
          .s_axi_awlen                      ({((C_AXI_PROTOCOL == P_AXI3) ? 4 : 8){1'b0}}),
          .s_axi_awsize                     ({3{1'b0}}),
          .s_axi_awburst                    ({2{1'b0}}),
          .s_axi_awlock                     ({((C_AXI_PROTOCOL == P_AXI3) ? 2 : 1){1'b0}}),
          .s_axi_awcache                    ({4{1'b0}}),
          .s_axi_awprot                     ({3{1'b0}}),
          .s_axi_awregion                   ({4{1'b0}}),
          .s_axi_awqos                      ({4{1'b0}}),
          .s_axi_awuser                     ({1{1'b0}}),
          .s_axi_awvalid                    ({1{1'b0}}),
          .s_axi_awready                    (),
          .s_axi_wid                        (wm_mr_wid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),
          .s_axi_wdata                      (wm_mr_wdata[gen_mi_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]),
          .s_axi_wstrb                      (wm_mr_wstrb[gen_mi_slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8]),
          .s_axi_wlast                      (wm_mr_wlast[gen_mi_slot]),
          .s_axi_wuser                      (wm_mr_wuser[gen_mi_slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH]),
          .s_axi_wvalid                     (wm_mr_wvalid[gen_mi_slot]),
          .s_axi_wready                     (wm_mr_wready[gen_mi_slot]),
          .s_axi_bid                        (st_mr_bid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]         ),
          .s_axi_bresp                      (st_mr_bresp[gen_mi_slot*2+:2]                                 ),
          .s_axi_buser                      (st_mr_buser[gen_mi_slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH] ),
          .s_axi_bvalid                     (st_mr_bvalid[gen_mi_slot*1+:1]                                ),
          .s_axi_bready                     (st_mr_bready[gen_mi_slot*1+:1]                                ),
          .s_axi_arid                       ({C_AXI_ID_WIDTH{1'b0}}),
          .s_axi_araddr                     ({1{1'b0}}),
          .s_axi_arlen                      ({((C_AXI_PROTOCOL == P_AXI3) ? 4 : 8){1'b0}}),
          .s_axi_arsize                     ({3{1'b0}}),
          .s_axi_arburst                    ({2{1'b0}}),
          .s_axi_arlock                     ({((C_AXI_PROTOCOL == P_AXI3) ? 2 : 1){1'b0}}),
          .s_axi_arcache                    ({4{1'b0}}),
          .s_axi_arprot                     ({3{1'b0}}),
          .s_axi_arregion                   ({4{1'b0}}),
          .s_axi_arqos                      ({4{1'b0}}),
          .s_axi_aruser                     ({1{1'b0}}),
          .s_axi_arvalid                    ({1{1'b0}}),
          .s_axi_arready                    (),
          .s_axi_rid                        (st_mr_rid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                          ),
          .s_axi_rdata                      (st_mr_rdata[gen_mi_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]  ),
          .s_axi_rresp                      (st_mr_rresp[gen_mi_slot*2+:2]                                                  ),
          .s_axi_rlast                      (st_mr_rlast[gen_mi_slot*1+:1]                                                  ),
          .s_axi_ruser                      (st_mr_ruser[gen_mi_slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]                  ),
          .s_axi_rvalid                     (st_mr_rvalid[gen_mi_slot*1+:1]                                                 ),
          .s_axi_rready                     (st_mr_rready[gen_mi_slot*1+:1]                                                 ),
          .m_axi_awid                       (),
          .m_axi_awaddr                     (),
          .m_axi_awlen                      (),
          .m_axi_awsize                     (),
          .m_axi_awburst                    (),
          .m_axi_awlock                     (),
          .m_axi_awcache                    (),
          .m_axi_awprot                     (),
          .m_axi_awregion                   (),
          .m_axi_awqos                      (),
          .m_axi_awuser                     (),
          .m_axi_awvalid                    (),
          .m_axi_awready                    ({1{1'b0}}),
          .m_axi_wid                        (mi_wid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),
          .m_axi_wdata                      (mi_wdata[gen_mi_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]),
          .m_axi_wstrb                      (mi_wstrb[gen_mi_slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8]),
          .m_axi_wlast                      (mi_wlast[gen_mi_slot]),
          .m_axi_wuser                      (mi_wuser[gen_mi_slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH]),
          .m_axi_wvalid                     (mi_wvalid[gen_mi_slot]),
          .m_axi_wready                     (mi_wready[gen_mi_slot]),
          .m_axi_bid                        (mi_bid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                          ),
          .m_axi_bresp                      (mi_bresp[gen_mi_slot*2+:2]                                                  ),
          .m_axi_buser                      (mi_buser[gen_mi_slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH]                  ),
          .m_axi_bvalid                     (mi_bvalid[gen_mi_slot*1+:1]                                                 ),
          .m_axi_bready                     (mi_bready[gen_mi_slot*1+:1]                                                 ),
          .m_axi_arid                       (),
          .m_axi_araddr                     (),
          .m_axi_arlen                      (),
          .m_axi_arsize                     (),
          .m_axi_arburst                    (),
          .m_axi_arlock                     (),
          .m_axi_arcache                    (),
          .m_axi_arprot                     (),
          .m_axi_arregion                   (),
          .m_axi_arqos                      (),
          .m_axi_aruser                     (),
          .m_axi_arvalid                    (),
          .m_axi_arready                    ({1{1'b0}}),
          .m_axi_rid                        (mi_rid[gen_mi_slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                          ),
          .m_axi_rdata                      (mi_rdata[gen_mi_slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]  ),
          .m_axi_rresp                      (mi_rresp[gen_mi_slot*2+:2]                                                  ),
          .m_axi_rlast                      (mi_rlast[gen_mi_slot*1+:1]                                                  ),
          .m_axi_ruser                      (mi_ruser[gen_mi_slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]                  ),
          .m_axi_rvalid                     (mi_rvalid[gen_mi_slot*1+:1]                                                 ),
          .m_axi_rready                     (mi_rready[gen_mi_slot*1+:1]                                                 )
        );
    end  // gen_master_slots (Next gen_mi_slot)
  
    // Highest row of *ready_carry contains accumulated OR across all SI-slots, for each MI-slot.
    assign st_mr_bready = bready_carry[(C_NUM_SLAVE_SLOTS-1)*(C_NUM_MASTER_SLOTS+1) +: C_NUM_MASTER_SLOTS+1]; 
    assign st_mr_rready = rready_carry[(C_NUM_SLAVE_SLOTS-1)*(C_NUM_MASTER_SLOTS+1) +: C_NUM_MASTER_SLOTS+1]; 
    // Assign MI-side B, R and W channel ports (exclude error handler signals).
    assign mi_bid[0+:C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH] = M_AXI_BID;
    assign mi_bvalid[0+:C_NUM_MASTER_SLOTS] = M_AXI_BVALID; 
    assign mi_bresp[0+:C_NUM_MASTER_SLOTS*2] = M_AXI_BRESP;
    assign mi_buser[0+:C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH] = M_AXI_BUSER;
    assign M_AXI_BREADY = mi_bready[0+:C_NUM_MASTER_SLOTS];
    assign mi_rid[0+:C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH] = M_AXI_RID;
    assign mi_rlast[0+:C_NUM_MASTER_SLOTS] = M_AXI_RLAST; 
    assign mi_rvalid[0+:C_NUM_MASTER_SLOTS] = M_AXI_RVALID; 
    assign mi_rresp[0+:C_NUM_MASTER_SLOTS*2] = M_AXI_RRESP;
    assign mi_ruser[0+:C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH] = M_AXI_RUSER;
    assign mi_rdata[0+:C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH] = M_AXI_RDATA;
    assign M_AXI_RREADY = mi_rready[0+:C_NUM_MASTER_SLOTS];
    assign M_AXI_WLAST = mi_wlast[0+:C_NUM_MASTER_SLOTS];
    assign M_AXI_WVALID = mi_wvalid[0+:C_NUM_MASTER_SLOTS];
    assign M_AXI_WUSER = mi_wuser[0+:C_NUM_MASTER_SLOTS*C_AXI_WUSER_WIDTH];
    assign M_AXI_WID = (C_AXI_PROTOCOL == P_AXI3) ? mi_wid[0+:C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH] : 0;
    assign M_AXI_WDATA = mi_wdata[0+:C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH];
    assign M_AXI_WSTRB = mi_wstrb[0+:C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH/8];
    assign mi_wready[0+:C_NUM_MASTER_SLOTS] = M_AXI_WREADY;

    axi_crossbar_v2_1_20_addr_arbiter #  // "AA": Addr Arbiter (AW channel)
      (
       .C_FAMILY                (C_FAMILY),
       .C_NUM_M                 (C_NUM_MASTER_SLOTS+1),
       .C_NUM_S                 (C_NUM_SLAVE_SLOTS),
       .C_NUM_S_LOG             (P_NUM_SLAVE_SLOTS_LOG),
       .C_MESG_WIDTH            (P_AA_AWMESG_WIDTH),
       .C_ARB_PRIORITY          (C_S_AXI_ARB_PRIORITY)
       )
      addr_arbiter_aw
        (
         .ACLK                  (ACLK),
         .ARESET                (reset),
         // Vector of SI-side AW command request inputs
         .S_MESG                (tmp_aa_awmesg),
         .S_TARGET_HOT          (st_aa_awtarget_hot),
         .S_VALID               (ss_aa_awvalid),
         .S_VALID_QUAL          (st_aa_awvalid_qual),
         .S_READY               (ss_aa_awready),
         // Granted AW command output
         .M_MESG                (aa_mi_awmesg),
         .M_TARGET_HOT          (aa_mi_awtarget_hot),  // MI-slot targeted by granted command
         .M_GRANT_ENC           (aa_wm_awgrant_enc),  // SI-slot index of granted command
         .M_VALID               (aa_sa_awvalid),
         .M_READY               (aa_sa_awready),
         .ISSUING_LIMIT        (mi_awmaxissuing)
        );
         
    // Broadcast AW transfer payload to all MI-slots
    assign M_AXI_AWID        = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[0+:C_AXI_ID_WIDTH]}};
    assign M_AXI_AWADDR      = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+:C_AXI_ADDR_WIDTH]}};
    assign M_AXI_AWLEN       = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH +:8]}};
    assign M_AXI_AWSIZE      = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8 +:3]}};
    assign M_AXI_AWLOCK      = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3 +:2]}};
    assign M_AXI_AWPROT      = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2 +:3]}};
    assign M_AXI_AWREGION    = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3 +:4]}};
    assign M_AXI_AWBURST     = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+4 +:2]}};
    assign M_AXI_AWCACHE     = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+4+2 +:4]}};
    assign M_AXI_AWQOS       = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+4+2+4 +:4]}};
    assign M_AXI_AWUSER      = {C_NUM_MASTER_SLOTS{aa_mi_awmesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+4+2+4+4 +:C_AXI_AWUSER_WIDTH]}};
         
    axi_crossbar_v2_1_20_addr_arbiter #  // "AA": Addr Arbiter (AR channel)
      (
       .C_FAMILY                (C_FAMILY),
       .C_NUM_M                 (C_NUM_MASTER_SLOTS+1),
       .C_NUM_S                 (C_NUM_SLAVE_SLOTS),
       .C_NUM_S_LOG             (P_NUM_SLAVE_SLOTS_LOG),
       .C_MESG_WIDTH            (P_AA_ARMESG_WIDTH),
       .C_ARB_PRIORITY          (C_S_AXI_ARB_PRIORITY)
       )
      addr_arbiter_ar
        (
         .ACLK                  (ACLK),
         .ARESET                (reset),
         // Vector of SI-side AR command request inputs
         .S_MESG                (tmp_aa_armesg),
         .S_TARGET_HOT          (st_aa_artarget_hot),
         .S_VALID_QUAL          (st_aa_arvalid_qual),
         .S_VALID               (st_aa_arvalid),
         .S_READY               (st_aa_arready),
         // Granted AR command output
         .M_MESG                (aa_mi_armesg),
         .M_TARGET_HOT          (aa_mi_artarget_hot),  // MI-slot targeted by granted command
         .M_GRANT_ENC           (aa_mi_argrant_enc),
         .M_VALID               (aa_mi_arvalid),  // SI-slot index of granted command
         .M_READY               (aa_mi_arready),
         .ISSUING_LIMIT        (mi_armaxissuing)
        );
    
    if (C_DEBUG) begin : gen_debug_trans_seq
      // DEBUG WRITE TRANSACTION SEQUENCE COUNTER
      always @(posedge ACLK) begin
        if (reset) begin
          debug_aw_trans_seq_i <= 1;
        end else begin
          if (aa_sa_awvalid && aa_sa_awready) begin
            debug_aw_trans_seq_i <= debug_aw_trans_seq_i + 1;
          end
        end
      end
  
      // DEBUG READ TRANSACTION SEQUENCE COUNTER
      always @(posedge ACLK) begin
        if (reset) begin
          debug_ar_trans_seq_i <= 1;
        end else begin
          if (aa_mi_arvalid && aa_mi_arready) begin
            debug_ar_trans_seq_i <= debug_ar_trans_seq_i + 1;
          end
        end
      end
    end  // gen_debug_trans_seq

    // Broadcast AR transfer payload to all MI-slots
    assign M_AXI_ARID        = {C_NUM_MASTER_SLOTS{aa_mi_armesg[0+:C_AXI_ID_WIDTH]}};
    assign M_AXI_ARADDR      = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+:C_AXI_ADDR_WIDTH]}};
    assign M_AXI_ARLEN       = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH +:8]}};
    assign M_AXI_ARSIZE      = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8 +:3]}};
    assign M_AXI_ARLOCK      = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3 +:2]}};
    assign M_AXI_ARPROT      = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2 +:3]}};
    assign M_AXI_ARREGION    = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3 +:4]}};
    assign M_AXI_ARBURST     = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+4 +:2]}};
    assign M_AXI_ARCACHE     = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+4+2 +:4]}};
    assign M_AXI_ARQOS       = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+4+2+4 +:4]}};
    assign M_AXI_ARUSER      = {C_NUM_MASTER_SLOTS{aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH+8+3+2+3+4+2+4+4 +:C_AXI_ARUSER_WIDTH]}};
         
    // AW arbiter command transfer completes upon completion of both M-side AW-channel transfer and W-mux address acceptance (command push).
    axi_crossbar_v2_1_20_splitter #  // "SA": Splitter for Write Addr Arbiter
      (
        .C_NUM_M                (2)
      )
      splitter_aw_mi
      (
         .ACLK                  (ACLK),
         .ARESET                (reset),
         .S_VALID              (aa_sa_awvalid),
         .S_READY              (aa_sa_awready),
         .M_VALID              ({mi_awvalid_en, sa_wm_awvalid_en}),
         .M_READY              ({mi_awready_mux, sa_wm_awready_mux})
      );
      
    assign mi_awvalid = aa_mi_awtarget_hot & {C_NUM_MASTER_SLOTS+1{mi_awvalid_en}};
    assign mi_awready_mux = |(aa_mi_awtarget_hot & mi_awready);
    assign M_AXI_AWVALID = mi_awvalid[0+:C_NUM_MASTER_SLOTS];  // Slot C_NUM_MASTER_SLOTS+1 is the error handler
    assign mi_awready[0+:C_NUM_MASTER_SLOTS] = M_AXI_AWREADY;
    assign sa_wm_awvalid = aa_mi_awtarget_hot & {C_NUM_MASTER_SLOTS+1{sa_wm_awvalid_en}};
    assign sa_wm_awready_mux = |(aa_mi_awtarget_hot & sa_wm_awready);
    
    assign mi_arvalid = aa_mi_artarget_hot & {C_NUM_MASTER_SLOTS+1{aa_mi_arvalid}};
    assign aa_mi_arready = |(aa_mi_artarget_hot & mi_arready);
    assign M_AXI_ARVALID = mi_arvalid[0+:C_NUM_MASTER_SLOTS];  // Slot C_NUM_MASTER_SLOTS+1 is the error handler
    assign mi_arready[0+:C_NUM_MASTER_SLOTS] = M_AXI_ARREADY;
    
    // MI-slot # C_NUM_MASTER_SLOTS is the error handler
    if (C_RANGE_CHECK) begin : gen_decerr_slave
      axi_crossbar_v2_1_20_decerr_slave #
        (
         .C_AXI_ID_WIDTH                 (C_AXI_ID_WIDTH),
         .C_AXI_DATA_WIDTH               (C_AXI_DATA_WIDTH),
         .C_AXI_RUSER_WIDTH                (C_AXI_RUSER_WIDTH),
         .C_AXI_BUSER_WIDTH                (C_AXI_BUSER_WIDTH),
         .C_AXI_PROTOCOL                 (C_AXI_PROTOCOL),
         .C_RESP                         (P_DECERR) 
        )
        decerr_slave_inst
          (
           .S_AXI_ACLK (ACLK),
           .S_AXI_ARESET (reset),
           .S_AXI_AWID (aa_mi_awmesg[0+:C_AXI_ID_WIDTH]),
           .S_AXI_AWVALID (mi_awvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_AWREADY (mi_awready[C_NUM_MASTER_SLOTS]),
           .S_AXI_WLAST (mi_wlast[C_NUM_MASTER_SLOTS]),
           .S_AXI_WVALID (mi_wvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_WREADY (mi_wready[C_NUM_MASTER_SLOTS]),
           .S_AXI_BID (mi_bid[C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),
           .S_AXI_BRESP (mi_bresp[C_NUM_MASTER_SLOTS*2+:2]),
           .S_AXI_BUSER (mi_buser[C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH]),
           .S_AXI_BVALID (mi_bvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_BREADY (mi_bready[C_NUM_MASTER_SLOTS]),
           .S_AXI_ARID (aa_mi_armesg[0+:C_AXI_ID_WIDTH]),
           .S_AXI_ARLEN (aa_mi_armesg[C_AXI_ID_WIDTH+C_AXI_ADDR_WIDTH +:8]),
           .S_AXI_ARVALID (mi_arvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_ARREADY (mi_arready[C_NUM_MASTER_SLOTS]),
           .S_AXI_RID (mi_rid[C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]),
           .S_AXI_RDATA (mi_rdata[C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]),
           .S_AXI_RRESP (mi_rresp[C_NUM_MASTER_SLOTS*2+:2]),
           .S_AXI_RUSER (mi_ruser[C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]),
           .S_AXI_RLAST (mi_rlast[C_NUM_MASTER_SLOTS]),
           .S_AXI_RVALID (mi_rvalid[C_NUM_MASTER_SLOTS]),
           .S_AXI_RREADY (mi_rready[C_NUM_MASTER_SLOTS])
         );
    end else begin : gen_no_decerr_slave
      assign mi_awready[C_NUM_MASTER_SLOTS] = 1'b0;
      assign mi_wready[C_NUM_MASTER_SLOTS] = 1'b0;
      assign mi_arready[C_NUM_MASTER_SLOTS] = 1'b0;
      assign mi_awready[C_NUM_MASTER_SLOTS] = 1'b0;
      assign mi_awready[C_NUM_MASTER_SLOTS] = 1'b0;
      assign mi_bid[C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                    = 0;
      assign mi_bresp[C_NUM_MASTER_SLOTS*2+:2]                                            = 0;
      assign mi_buser[C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH]            = 0;
      assign mi_bvalid[C_NUM_MASTER_SLOTS]                                                = 1'b0;
      assign mi_rid[C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                    = 0;
      assign mi_rdata[C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH] = 0; 
      assign mi_rresp[C_NUM_MASTER_SLOTS*2+:2]                                            = 0; 
      assign mi_ruser[C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]            = 0; 
      assign mi_rlast[C_NUM_MASTER_SLOTS]                                                  = 1'b0;
      assign mi_rvalid[C_NUM_MASTER_SLOTS]                                                 = 1'b0;
    end  // gen_decerr_slave
  endgenerate

endmodule

`default_nettype wire


// -- (c) Copyright 2009 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// File name: decerr_slave.v
//
// Description: 
//   Phantom slave interface used to complete W, R and B channel transfers when an
//   erroneous transaction is trapped in the crossbar.
//--------------------------------------------------------------------------
//
// Structure:
//    decerr_slave
//    
//-----------------------------------------------------------------------------

`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_decerr_slave #
  (
   parameter integer C_AXI_ID_WIDTH           = 1,
   parameter integer C_AXI_DATA_WIDTH         = 32,
   parameter integer C_AXI_BUSER_WIDTH        = 1,
   parameter integer C_AXI_RUSER_WIDTH        = 1,
   parameter integer C_AXI_PROTOCOL           = 0,
   parameter integer C_RESP                   = 2'b11   
   )
  (
   input wire S_AXI_ACLK,
   input wire S_AXI_ARESET,
   input wire [(C_AXI_ID_WIDTH-1):0] S_AXI_AWID,
   input wire S_AXI_AWVALID,
   output wire S_AXI_AWREADY,
   input wire S_AXI_WLAST,
   input wire S_AXI_WVALID,
   output wire S_AXI_WREADY,
   output wire [(C_AXI_ID_WIDTH-1):0] S_AXI_BID,
   output wire [1:0] S_AXI_BRESP,
   output wire [C_AXI_BUSER_WIDTH-1:0]          S_AXI_BUSER,
   output wire S_AXI_BVALID,
   input wire S_AXI_BREADY,
   input wire [(C_AXI_ID_WIDTH-1):0] S_AXI_ARID,
   input wire [7:0] S_AXI_ARLEN,
   input wire S_AXI_ARVALID,
   output wire S_AXI_ARREADY,
   output wire [(C_AXI_ID_WIDTH-1):0] S_AXI_RID,
   output wire [(C_AXI_DATA_WIDTH-1):0] S_AXI_RDATA,
   output wire [1:0] S_AXI_RRESP,
   output wire [C_AXI_RUSER_WIDTH-1:0]          S_AXI_RUSER,
   output wire S_AXI_RLAST,
   output wire S_AXI_RVALID,
   input wire S_AXI_RREADY
   );
   
  reg s_axi_awready_i = 1'b0;
  reg s_axi_wready_i = 1'b0;
  reg s_axi_bvalid_i = 1'b0;
  reg s_axi_arready_i = 1'b0;
  reg s_axi_rvalid_i = 1'b0;
  
  localparam P_WRITE_IDLE = 2'b00;
  localparam P_WRITE_DATA = 2'b01;
  localparam P_WRITE_RESP = 2'b10;
  localparam P_READ_IDLE = 1'b0;
  localparam P_READ_DATA = 1'b1;
  localparam integer  P_AXI4 = 0;
  localparam integer  P_AXI3 = 1;
  localparam integer  P_AXILITE = 2;
   
  assign S_AXI_BRESP = C_RESP;
  assign S_AXI_RRESP = C_RESP;
  //assign S_AXI_RDATA = {C_AXI_DATA_WIDTH{1'b0}};
  assign S_AXI_RDATA = {C_AXI_DATA_WIDTH/32{32'hDEC0_DE1C}};
  assign S_AXI_BUSER = {C_AXI_BUSER_WIDTH{1'b0}};
  assign S_AXI_RUSER = {C_AXI_RUSER_WIDTH{1'b0}};
  assign S_AXI_AWREADY = s_axi_awready_i;
  assign S_AXI_WREADY = s_axi_wready_i;
  assign S_AXI_BVALID = s_axi_bvalid_i;
  assign S_AXI_ARREADY = s_axi_arready_i;
  assign S_AXI_RVALID = s_axi_rvalid_i;
  
  generate
  if (C_AXI_PROTOCOL == P_AXILITE) begin : gen_axilite
    
    assign S_AXI_RLAST = 1'b1;
    assign S_AXI_BID = 0;
    assign S_AXI_RID = 0;
    
    always @(posedge S_AXI_ACLK) begin
      if (S_AXI_ARESET) begin
        s_axi_awready_i <= 1'b0;
        s_axi_wready_i <= 1'b0;
        s_axi_bvalid_i <= 1'b0;
      end else begin
        if (s_axi_bvalid_i) begin
          if (S_AXI_BREADY) begin
            s_axi_bvalid_i <= 1'b0;
          end
        end else if (S_AXI_AWVALID & S_AXI_WVALID) begin
          if (s_axi_awready_i) begin
            s_axi_awready_i <= 1'b0;
            s_axi_wready_i <= 1'b0;
            s_axi_bvalid_i <= 1'b1;
          end else begin
            s_axi_awready_i <= 1'b1;
            s_axi_wready_i <= 1'b1;
          end
        end
      end
    end
           
    always @(posedge S_AXI_ACLK) begin
      if (S_AXI_ARESET) begin
        s_axi_arready_i <= 1'b0;
        s_axi_rvalid_i <= 1'b0;
      end else begin
        if (s_axi_rvalid_i) begin
          if (S_AXI_RREADY) begin
            s_axi_rvalid_i <= 1'b0;
          end
        end else if (S_AXI_ARVALID & s_axi_arready_i) begin
          s_axi_arready_i <= 1'b0;
          s_axi_rvalid_i <= 1'b1;
        end else begin
          s_axi_arready_i <= 1'b1;
        end
      end
    end
        
  end else begin : gen_axi
  
    reg s_axi_rlast_i;
    reg [(C_AXI_ID_WIDTH-1):0] s_axi_bid_i;
    reg [(C_AXI_ID_WIDTH-1):0] s_axi_rid_i;
    reg [7:0] read_cnt;
    reg [1:0] write_cs;
    reg [0:0] read_cs;
  
    assign S_AXI_RLAST = s_axi_rlast_i;
    assign S_AXI_BID = s_axi_bid_i;
    assign S_AXI_RID = s_axi_rid_i;
  
    always @(posedge S_AXI_ACLK) begin
      if (S_AXI_ARESET) begin
        write_cs <= P_WRITE_IDLE;
        s_axi_awready_i <= 1'b0;
        s_axi_wready_i <= 1'b0;
        s_axi_bvalid_i <= 1'b0;
        s_axi_bid_i <= 0;
      end else begin
        case (write_cs) 
          P_WRITE_IDLE: 
            begin
              if (S_AXI_AWVALID & s_axi_awready_i) begin
                s_axi_awready_i <= 1'b0;
                s_axi_bid_i <= S_AXI_AWID;
                s_axi_wready_i <= 1'b1;
                write_cs <= P_WRITE_DATA;
              end else begin
                s_axi_awready_i <= 1'b1;
              end
            end
          P_WRITE_DATA:
            begin
              if (S_AXI_WVALID & S_AXI_WLAST) begin
                s_axi_wready_i <= 1'b0;
                s_axi_bvalid_i <= 1'b1;
                write_cs <= P_WRITE_RESP;
              end
            end
          P_WRITE_RESP:
            begin
              if (S_AXI_BREADY) begin
                s_axi_bvalid_i <= 1'b0;
                s_axi_awready_i <= 1'b1;
                write_cs <= P_WRITE_IDLE;
              end
            end
        endcase
      end
    end
  
    always @(posedge S_AXI_ACLK) begin
      if (S_AXI_ARESET) begin
        read_cs <= P_READ_IDLE;
        s_axi_arready_i <= 1'b0;
        s_axi_rvalid_i <= 1'b0;
        s_axi_rlast_i <= 1'b0;
        s_axi_rid_i <= 0;
        read_cnt <= 0;
      end else begin
        case (read_cs) 
          P_READ_IDLE: 
            begin
              if (S_AXI_ARVALID & s_axi_arready_i) begin
                s_axi_arready_i <= 1'b0;
                s_axi_rid_i <= S_AXI_ARID;
                read_cnt <= S_AXI_ARLEN;
                s_axi_rvalid_i <= 1'b1;
                if (S_AXI_ARLEN == 0) begin
                  s_axi_rlast_i <= 1'b1;
                end else begin
                  s_axi_rlast_i <= 1'b0;
                end
                read_cs <= P_READ_DATA;
              end else begin
                s_axi_arready_i <= 1'b1;
              end
            end
          P_READ_DATA:
            begin
              if (S_AXI_RREADY) begin
                if (read_cnt == 0) begin
                  s_axi_rvalid_i <= 1'b0;
                  s_axi_rlast_i <= 1'b0;
                  s_axi_arready_i <= 1'b1;
                  read_cs <= P_READ_IDLE;
                end else begin
                  if (read_cnt == 1) begin
                    s_axi_rlast_i <= 1'b1;
                  end
                  read_cnt <= read_cnt - 1;
                end
              end
            end
        endcase
      end
    end
  
  end  
  endgenerate

endmodule

`default_nettype wire


// -- (c) Copyright 2009 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// File name: si_transactor.v
//
// Description: 
//   This module manages multi-threaded transactions for one SI-slot.
//   The module interface consists of a 1-slave to 1-master address channel, plus a
//     (M+1)-master (from M MI-slots plus error handler) to 1-slave response channel.
//   The module maintains transaction thread control registers that count the
//     number of outstanding transations for each thread and the target MI-slot.
//   On the address channel, the module decodes addresses to select among MI-slots 
//     accessible to the SI-slot where it is instantiated.
//     It then qualifies whether each received transaction
//     should be propagated as a request to the address channel arbiter.
//     Transactions are blocked while there is any outstanding transaction to a 
//     different slave (MI-slot) for the requested ID thread (for deadlock avoidance).
//   On the response channel, the module mulitplexes transfers from each of the 
//     MI-slots whenever a transfer targets the ID of an active thread,
//     arbitrating between MI-slots if multiple threads respond concurrently.
//
//--------------------------------------------------------------------------
//
// Structure:
//    si_transactor
//      addr_decoder
//        comparator_static
//      mux_enc
//      axic_srl_fifo
//      arbiter_resp
//      
//-----------------------------------------------------------------------------
`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_si_transactor #
  (
   parameter         C_FAMILY                       = "none", 
   parameter integer C_SI             =   0, // SI-slot number of current instance.
   parameter integer C_DIR             =   0, // Direction: 0 = Write; 1 = Read.
   parameter integer C_NUM_ADDR_RANGES = 1,
   parameter integer C_NUM_M             =   2, 
   parameter integer C_NUM_M_LOG             =   1, 
   parameter integer C_ACCEPTANCE             =   1,  // Acceptance limit of this SI-slot.
   parameter integer C_ACCEPTANCE_LOG             =   0,  // Width of acceptance counter for this SI-slot.
   parameter integer C_ID_WIDTH                   = 1, 
   parameter integer C_THREAD_ID_WIDTH                  = 0,
   parameter integer C_ADDR_WIDTH                 = 32, 
   parameter integer C_AMESG_WIDTH = 1,  // Used for AW or AR channel payload, depending on instantiation.
   parameter integer C_RMESG_WIDTH = 1,  // Used for B or R channel payload, depending on instantiation.
   parameter [C_ID_WIDTH-1:0]  C_BASE_ID                  = {C_ID_WIDTH{1'b0}},
   parameter [C_ID_WIDTH-1:0]  C_HIGH_ID                  = {C_ID_WIDTH{1'b0}},
   parameter [C_NUM_M*C_NUM_ADDR_RANGES*64-1:0] C_BASE_ADDR = {C_NUM_M*C_NUM_ADDR_RANGES*64{1'b1}}, 
   parameter [C_NUM_M*C_NUM_ADDR_RANGES*64-1:0] C_HIGH_ADDR = {C_NUM_M*C_NUM_ADDR_RANGES*64{1'b0}}, 
   parameter integer C_SINGLE_THREAD             =   0,
   parameter [C_NUM_M-1:0]    C_TARGET_QUAL                 = {C_NUM_M{1'b1}},
   parameter [C_NUM_M*32-1:0] C_M_AXI_SECURE                   = {C_NUM_M{32'h00000000}},
   parameter integer C_RANGE_CHECK                    = 0,
   parameter integer C_ADDR_DECODE           =0,
   parameter [C_NUM_M*32-1:0] C_ERR_MODE            = {C_NUM_M{32'h00000000}},
   parameter integer C_DEBUG                = 1
   )
  (
   // Global Signals
   input  wire                                                    ACLK,
   input  wire                                                    ARESET,
   // Slave Address Channel Interface Ports
   input  wire [C_ID_WIDTH-1:0]           S_AID,
   input  wire [C_ADDR_WIDTH-1:0]          S_AADDR,
   input  wire [8-1:0]                    S_ALEN,
   input  wire [3-1:0]                    S_ASIZE,
   input  wire [2-1:0]                    S_ABURST,
   input  wire [2-1:0]                    S_ALOCK,
   input  wire [3-1:0]                    S_APROT,
//   input  wire [4-1:0]                    S_AREGION,
   input  wire [C_AMESG_WIDTH-1:0]         S_AMESG,
   input  wire                             S_AVALID,
   output wire                             S_AREADY,
   // Master Address Channel Interface Ports
   output wire [C_ID_WIDTH-1:0]          M_AID,
   output wire [C_ADDR_WIDTH-1:0]          M_AADDR,
   output  wire [8-1:0]                    M_ALEN,
   output  wire [3-1:0]                    M_ASIZE,
   output  wire [2-1:0]                    M_ALOCK,
   output  wire [3-1:0]                    M_APROT,
   output wire [4-1:0]                         M_AREGION,
   output wire [C_AMESG_WIDTH-1:0]                         M_AMESG,
   output wire [(C_NUM_M+1)-1:0]                         M_ATARGET_HOT,
   output wire [(C_NUM_M_LOG+1)-1:0]                         M_ATARGET_ENC,
   output wire [7:0]                         M_AERROR,
   output wire                            M_AVALID_QUAL,
   output wire                            M_AVALID,
   input  wire                            M_AREADY,
   // Slave Response Channel Interface Ports
   output  wire [C_ID_WIDTH-1:0]           S_RID,
   output  wire [C_RMESG_WIDTH-1:0]         S_RMESG,
   output  wire                             S_RLAST,
   output  wire                             S_RVALID,
   input wire                             S_RREADY,
   // Master Response Channel Interface Ports
   input wire [(C_NUM_M+1)*C_ID_WIDTH-1:0]          M_RID,
   input wire [(C_NUM_M+1)*C_RMESG_WIDTH-1:0]             M_RMESG,
   input wire [(C_NUM_M+1)-1:0]                           M_RLAST,
   input wire [(C_NUM_M+1)-1:0]                           M_RVALID,
   output  wire [(C_NUM_M+1)-1:0]                           M_RREADY,
   input wire [(C_NUM_M+1)-1:0]           M_RTARGET,  // Does response ID from each MI-slot target this SI slot?
   input wire [8-1:0]                        DEBUG_A_TRANS_SEQ
   );

  localparam integer P_WRITE = 0;
  localparam integer P_READ = 1;
  localparam integer P_RMUX_MESG_WIDTH = C_ID_WIDTH + C_RMESG_WIDTH + 1;
  localparam [31:0]   P_AXILITE_ERRMODE = 32'h00000001;
  localparam integer P_NONSECURE_BIT = 1; 
  localparam integer P_NUM_M_LOG_M1 = C_NUM_M_LOG ? C_NUM_M_LOG : 1;
  localparam [C_NUM_M-1:0] P_M_AXILITE = f_m_axilite(0);  // Mask of AxiLite MI-slots
  localparam [1:0]   P_FIXED = 2'b00;
  localparam integer P_NUM_M_DE_LOG = f_ceil_log2(C_NUM_M+1);
  localparam integer P_THREAD_ID_WIDTH_M1 = (C_THREAD_ID_WIDTH > 0) ? C_THREAD_ID_WIDTH : 1; 
  localparam integer P_NUM_ID_VAL = 2**C_THREAD_ID_WIDTH;
  localparam integer P_NUM_THREADS = (P_NUM_ID_VAL < C_ACCEPTANCE) ? P_NUM_ID_VAL : C_ACCEPTANCE;
  localparam [C_NUM_M-1:0] P_M_SECURE_MASK = f_bit32to1_mi(C_M_AXI_SECURE);  // Mask of secure MI-slots
  
  // Ceiling of log2(x)
  function integer f_ceil_log2
    (
     input integer x
     );
    integer acc;
    begin
      acc=0;
      while ((2**acc) < x)
        acc = acc + 1;
      f_ceil_log2 = acc;
    end
  endfunction

  // AxiLite protocol flag vector      
  function [C_NUM_M-1:0] f_m_axilite
    (
      input integer null_arg
    );
    integer mi;
    begin
      for (mi=0; mi<C_NUM_M; mi=mi+1) begin
        f_m_axilite[mi] = (C_ERR_MODE[mi*32+:32] == P_AXILITE_ERRMODE);
      end
    end
  endfunction

  // Convert Bit32 vector of range [0,1] to Bit1 vector on MI
  function [C_NUM_M-1:0] f_bit32to1_mi
    (input [C_NUM_M*32-1:0] vec32);
    integer mi;
    begin
      for (mi=0; mi<C_NUM_M; mi=mi+1) begin
        f_bit32to1_mi[mi] = vec32[mi*32];
      end
    end
  endfunction
  
  wire [C_NUM_M-1:0] target_mi_hot;
  wire [P_NUM_M_LOG_M1-1:0] target_mi_enc;
  wire [(C_NUM_M+1)-1:0] m_atarget_hot_i;
  wire [(P_NUM_M_DE_LOG)-1:0] m_atarget_enc_i;
  wire match;
  wire [3:0] target_region;
  wire [3:0] m_aregion_i;
  wire m_avalid_i;
  wire s_aready_i;
  wire any_error;
  wire s_rvalid_i;
  wire [C_ID_WIDTH-1:0] s_rid_i;
  wire s_rlast_i;
  wire [P_RMUX_MESG_WIDTH-1:0] si_rmux_mesg;
  wire [(C_NUM_M+1)*P_RMUX_MESG_WIDTH-1:0] mi_rmux_mesg;
  wire [(C_NUM_M+1)-1:0] m_rvalid_qual;
  wire [(C_NUM_M+1)-1:0] m_rready_arb;
  wire [(C_NUM_M+1)-1:0] m_rready_i;
  wire target_secure;
  wire target_axilite;
  wire m_avalid_qual_i;
  wire [7:0] m_aerror_i;
  
  genvar gen_mi;
  genvar gen_thread;
    
  generate
    if (C_ADDR_DECODE) begin : gen_addr_decoder
      axi_crossbar_v2_1_20_addr_decoder #
        (
          .C_FAMILY          (C_FAMILY),
          .C_NUM_TARGETS     (C_NUM_M),
          .C_NUM_TARGETS_LOG (P_NUM_M_LOG_M1),
          .C_NUM_RANGES      (C_NUM_ADDR_RANGES),
          .C_ADDR_WIDTH      (C_ADDR_WIDTH),
          .C_TARGET_ENC      (1),
          .C_TARGET_HOT      (1),
          .C_REGION_ENC      (1),
          .C_BASE_ADDR      (C_BASE_ADDR),
          .C_HIGH_ADDR      (C_HIGH_ADDR),
          .C_TARGET_QUAL     (C_TARGET_QUAL),
          .C_RESOLUTION      (2)
        ) 
        addr_decoder_inst 
        (
          .ADDR             (S_AADDR),        
          .TARGET_HOT       (target_mi_hot),  
          .TARGET_ENC       (target_mi_enc),  
          .MATCH            (match),       
          .REGION           (target_region)      
        );
    end else begin : gen_no_addr_decoder
      assign target_mi_hot = 1;
      assign target_mi_enc = 0;
      assign match = 1'b1;
      assign target_region = 4'b0000;
    end
  endgenerate
  
  assign target_secure = |(target_mi_hot & P_M_SECURE_MASK);
  assign target_axilite = |(target_mi_hot & P_M_AXILITE);

  assign any_error = C_RANGE_CHECK && (m_aerror_i != 0);            // DECERR if error-detection enabled and any error condition.
  assign m_aerror_i[0] = ~match;                                    // Invalid target address
  assign m_aerror_i[1] = target_secure && S_APROT[P_NONSECURE_BIT]; // TrustZone violation
  assign m_aerror_i[2] = target_axilite && ((S_ALEN != 0) || 
    (S_ASIZE[1:0] == 2'b11) || (S_ASIZE[2] == 1'b1));               // AxiLite access violation
  assign m_aerror_i[7:3] = 5'b00000;                                    // Reserved
  assign M_ATARGET_HOT = m_atarget_hot_i;
  assign m_atarget_hot_i = (any_error ? {1'b1, {C_NUM_M{1'b0}}} : {1'b0, target_mi_hot});
  assign m_atarget_enc_i = (any_error ? C_NUM_M : target_mi_enc);
    
  assign M_AVALID = m_avalid_i;
  assign m_avalid_i = S_AVALID;
  assign M_AVALID_QUAL = m_avalid_qual_i; 
  assign S_AREADY = s_aready_i;
  assign s_aready_i = M_AREADY;
  assign M_AERROR = m_aerror_i;
  assign M_ATARGET_ENC = m_atarget_enc_i;
  assign m_aregion_i = any_error ? 4'b0000 : (C_ADDR_DECODE != 0) ? target_region : 4'b0000;
//  assign m_aregion_i = any_error ? 4'b0000 : (C_ADDR_DECODE != 0) ? target_region : S_AREGION;
  assign M_AREGION = m_aregion_i;
  assign M_AID = S_AID;
  assign M_AADDR = S_AADDR;
  assign M_ALEN = S_ALEN;
  assign M_ASIZE = S_ASIZE;
  assign M_ALOCK = S_ALOCK;
  assign M_APROT = S_APROT;
  assign M_AMESG = S_AMESG;
  
  assign S_RVALID = s_rvalid_i;
  assign M_RREADY = m_rready_i;
  assign s_rid_i = si_rmux_mesg[0+:C_ID_WIDTH];
  assign S_RMESG = si_rmux_mesg[C_ID_WIDTH+:C_RMESG_WIDTH];
  assign s_rlast_i = si_rmux_mesg[C_ID_WIDTH+C_RMESG_WIDTH+:1];
  assign S_RID = s_rid_i;
  assign S_RLAST = s_rlast_i;
  assign m_rvalid_qual = M_RVALID & M_RTARGET;
  assign m_rready_i = m_rready_arb & M_RTARGET;

  generate
    for (gen_mi=0; gen_mi<(C_NUM_M+1); gen_mi=gen_mi+1) begin : gen_rmesg_mi
      // Note: Concatenation of mesg signals is from MSB to LSB; assignments that chop mesg signals appear in opposite order.
      assign mi_rmux_mesg[gen_mi*P_RMUX_MESG_WIDTH+:P_RMUX_MESG_WIDTH] = {
               M_RLAST[gen_mi],
               M_RMESG[gen_mi*C_RMESG_WIDTH+:C_RMESG_WIDTH],
               M_RID[gen_mi*C_ID_WIDTH+:C_ID_WIDTH]
               };
    end  // gen_rmesg_mi

    if (C_ACCEPTANCE == 1) begin : gen_single_issue
      wire  cmd_push;
      wire  cmd_pop;
      reg  [(C_NUM_M+1)-1:0] active_target_hot = 0;
      reg  [P_NUM_M_DE_LOG-1:0] active_target_enc = 0;
      reg  accept_cnt = 1'b0;
      reg  [8-1:0] debug_r_beat_cnt_i;
      wire [8-1:0] debug_r_trans_seq_i;

      assign cmd_push = M_AREADY;
      assign cmd_pop = s_rvalid_i && S_RREADY && s_rlast_i;  // Pop command queue if end of read burst
      assign m_avalid_qual_i = ~accept_cnt | cmd_pop;  // Ready for arbitration if no outstanding transaction or transaction being completed

      always @(posedge ACLK) begin 
        if (ARESET) begin
          accept_cnt <= 1'b0;
          active_target_enc <= 0;
          active_target_hot <= 0;
        end else begin
          if (cmd_push) begin
            active_target_enc <= m_atarget_enc_i;
            active_target_hot <= m_atarget_hot_i;
            accept_cnt <= 1'b1;
          end else if (cmd_pop) begin
            accept_cnt <= 1'b0;
          end
        end 
      end  // Clocked process
        
      assign m_rready_arb = active_target_hot & {(C_NUM_M+1){S_RREADY}};
      assign s_rvalid_i = |(active_target_hot & m_rvalid_qual);
                 
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      (C_FAMILY),
         .C_RATIO       (C_NUM_M+1),
         .C_SEL_WIDTH   (P_NUM_M_DE_LOG),
         .C_DATA_WIDTH  (P_RMUX_MESG_WIDTH)
        ) mux_resp_single_issue
        (
         .S   (active_target_enc),
         .A   (mi_rmux_mesg),
         .O   (si_rmux_mesg),
         .OE  (1'b1)
        ); 
        
      if (C_DEBUG) begin : gen_debug_r_single_issue
        // DEBUG READ BEAT COUNTER (only meaningful for R-channel)
        always @(posedge ACLK) begin
          if (ARESET) begin
            debug_r_beat_cnt_i <= 0;
          end else if (C_DIR == P_READ) begin
            if (s_rvalid_i && S_RREADY) begin
              if (s_rlast_i) begin
                debug_r_beat_cnt_i <= 0;
              end else begin
                debug_r_beat_cnt_i <= debug_r_beat_cnt_i + 1;
              end
            end
          end else begin
            debug_r_beat_cnt_i <= 0;            
          end
        end  // Clocked process
        
        // DEBUG R-CHANNEL TRANSACTION SEQUENCE FIFO
        axi_data_fifo_v2_1_18_axic_srl_fifo #
          (
           .C_FAMILY          (C_FAMILY),
           .C_FIFO_WIDTH      (8),
           .C_FIFO_DEPTH_LOG  (C_ACCEPTANCE_LOG+1),
           .C_USE_FULL        (0)
           )
          debug_r_seq_fifo_single_issue
            (
             .ACLK    (ACLK),
             .ARESET  (ARESET),
             .S_MESG  (DEBUG_A_TRANS_SEQ),
             .S_VALID (cmd_push),
             .S_READY (),
             .M_MESG  (debug_r_trans_seq_i),
             .M_VALID (),
             .M_READY (cmd_pop)
            );
            
      end  // gen_debug_r
      
    end else if (C_SINGLE_THREAD || (P_NUM_ID_VAL==1)) begin : gen_single_thread
      wire  s_avalid_en;
      wire  cmd_push;
      wire  cmd_pop;
      reg  [C_ID_WIDTH-1:0] active_id;
      reg  [(C_NUM_M+1)-1:0] active_target_hot = 0;
      reg  [P_NUM_M_DE_LOG-1:0] active_target_enc = 0;
      reg  [4-1:0] active_region;
      reg  [(C_ACCEPTANCE_LOG+1)-1:0] accept_cnt = 0;
      reg  [8-1:0] debug_r_beat_cnt_i;
      wire [8-1:0] debug_r_trans_seq_i;
      wire accept_limit ;

      // Implement single-region-per-ID cyclic dependency avoidance method.
      assign s_avalid_en =  // This transaction is qualified to request arbitration if ...
        (accept_cnt == 0) ||  // Either there are no outstanding transactions, or ...
        (((P_NUM_ID_VAL==1) || (S_AID[P_THREAD_ID_WIDTH_M1-1:0] == active_id[P_THREAD_ID_WIDTH_M1-1:0])) &&  // the current transaction ID matches the previous, and ...
        (active_target_enc == m_atarget_enc_i) &&  // all outstanding transactions are to the same target MI ...
        (active_region == m_aregion_i));  // and to the same REGION.
      
      assign cmd_push = M_AREADY;
      assign cmd_pop = s_rvalid_i && S_RREADY && s_rlast_i;  // Pop command queue if end of read burst
      assign accept_limit = (accept_cnt == C_ACCEPTANCE) & ~cmd_pop;  // Allow next push if a transaction is currently being completed
      assign m_avalid_qual_i = s_avalid_en & ~accept_limit; 
      
      always @(posedge ACLK) begin 
        if (ARESET) begin
          accept_cnt <= 0;
          active_id <= 0;
          active_target_enc <= 0;
          active_target_hot <= 0;
          active_region <= 0;
        end else begin
          if (cmd_push) begin
            active_id <= S_AID[P_THREAD_ID_WIDTH_M1-1:0];
            active_target_enc <= m_atarget_enc_i;
            active_target_hot <= m_atarget_hot_i;
            active_region <= m_aregion_i;
            if (~cmd_pop) begin
              accept_cnt <= accept_cnt + 1;
            end
          end else begin
            if (cmd_pop & (accept_cnt != 0)) begin
              accept_cnt <= accept_cnt - 1;
            end
          end
        end 
      end  // Clocked process
        
      assign m_rready_arb = active_target_hot & {(C_NUM_M+1){S_RREADY}};
      assign s_rvalid_i = |(active_target_hot & m_rvalid_qual);
                 
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      (C_FAMILY),
         .C_RATIO       (C_NUM_M+1),
         .C_SEL_WIDTH   (P_NUM_M_DE_LOG),
         .C_DATA_WIDTH  (P_RMUX_MESG_WIDTH)
        ) mux_resp_single_thread
        (
         .S   (active_target_enc),
         .A   (mi_rmux_mesg),
         .O   (si_rmux_mesg),
         .OE  (1'b1)
        ); 
        
      if (C_DEBUG) begin : gen_debug_r_single_thread
        // DEBUG READ BEAT COUNTER (only meaningful for R-channel)
        always @(posedge ACLK) begin
          if (ARESET) begin
            debug_r_beat_cnt_i <= 0;
          end else if (C_DIR == P_READ) begin
            if (s_rvalid_i && S_RREADY) begin
              if (s_rlast_i) begin
                debug_r_beat_cnt_i <= 0;
              end else begin
                debug_r_beat_cnt_i <= debug_r_beat_cnt_i + 1;
              end
            end
          end else begin
            debug_r_beat_cnt_i <= 0;            
          end
        end  // Clocked process
        
        // DEBUG R-CHANNEL TRANSACTION SEQUENCE FIFO
        axi_data_fifo_v2_1_18_axic_srl_fifo #
          (
           .C_FAMILY          (C_FAMILY),
           .C_FIFO_WIDTH      (8),
           .C_FIFO_DEPTH_LOG  (C_ACCEPTANCE_LOG+1),
           .C_USE_FULL        (0)
           )
          debug_r_seq_fifo_single_thread
            (
             .ACLK    (ACLK),
             .ARESET  (ARESET),
             .S_MESG  (DEBUG_A_TRANS_SEQ),
             .S_VALID (cmd_push),
             .S_READY (),
             .M_MESG  (debug_r_trans_seq_i),
             .M_VALID (),
             .M_READY (cmd_pop)
            );
            
      end  // gen_debug_r
      
    end else begin : gen_multi_thread
      wire [(P_NUM_M_DE_LOG)-1:0] resp_select;
      reg  [(C_ACCEPTANCE_LOG+1)-1:0] accept_cnt = 0;
      wire [P_NUM_THREADS-1:0] s_avalid_en;
      wire [P_NUM_THREADS-1:0] thread_valid;
      wire [P_NUM_THREADS-1:0] aid_match;
      wire [P_NUM_THREADS-1:0] rid_match;
      wire [P_NUM_THREADS-1:0] cmd_push;
      wire [P_NUM_THREADS-1:0] cmd_pop;
      wire [P_NUM_THREADS:0]   accum_push;
      reg  [P_NUM_THREADS*C_ID_WIDTH-1:0] active_id;
      reg  [P_NUM_THREADS*8-1:0] active_target;
      reg  [P_NUM_THREADS*8-1:0] active_region;
      reg  [P_NUM_THREADS*8-1:0] active_cnt = 0;
      reg  [P_NUM_THREADS*8-1:0] debug_r_beat_cnt_i;
      wire [P_NUM_THREADS*8-1:0] debug_r_trans_seq_i;
      wire any_aid_match;
      wire any_rid_match;
      wire accept_limit;
      wire any_push;
      wire any_pop;
        
      axi_crossbar_v2_1_20_arbiter_resp #  // Multi-thread response arbiter
        (
         .C_FAMILY                (C_FAMILY),
         .C_NUM_S                 (C_NUM_M+1),
         .C_NUM_S_LOG             (P_NUM_M_DE_LOG),
         .C_GRANT_ENC            (1),
         .C_GRANT_HOT            (0)
         )
        arbiter_resp_inst
          (
           .ACLK                  (ACLK),
           .ARESET                (ARESET),
           .S_VALID               (m_rvalid_qual),
           .S_READY               (m_rready_arb),
           .M_GRANT_HOT           (),
           .M_GRANT_ENC           (resp_select),
           .M_VALID               (s_rvalid_i),
           .M_READY               (S_RREADY)
           );
                 
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      (C_FAMILY),
         .C_RATIO       (C_NUM_M+1),
         .C_SEL_WIDTH   (P_NUM_M_DE_LOG),
         .C_DATA_WIDTH  (P_RMUX_MESG_WIDTH)
        ) mux_resp_multi_thread
        (
         .S   (resp_select),
         .A   (mi_rmux_mesg),
         .O   (si_rmux_mesg),
         .OE  (1'b1)
        ); 
        
      assign any_push = M_AREADY;
      assign any_pop = s_rvalid_i & S_RREADY & s_rlast_i;
      assign accept_limit = (accept_cnt == C_ACCEPTANCE) & ~any_pop;  // Allow next push if a transaction is currently being completed
        assign m_avalid_qual_i = (&s_avalid_en) & ~accept_limit;  // The current request is qualified for arbitration when it is qualified against all outstanding transaction threads.
        assign any_aid_match = |aid_match;
        assign any_rid_match = |rid_match;
        assign accum_push[0] = 1'b0;
        
        always @(posedge ACLK) begin
          if (ARESET) begin
            accept_cnt <= 0; 
          end else begin
            if (any_push & ~any_pop) begin
              accept_cnt <= accept_cnt + 1;
          end else if (any_pop & ~any_push & (accept_cnt != 0)) begin
              accept_cnt <= accept_cnt - 1;
            end
          end 
        end  // Clocked process
          
        for (gen_thread=0; gen_thread<P_NUM_THREADS; gen_thread=gen_thread+1) begin : gen_thread_loop
          assign thread_valid[gen_thread] = (active_cnt[gen_thread*8 +: C_ACCEPTANCE_LOG+1] != 0);
          assign aid_match[gen_thread] =  // The currect thread is active for the requested transaction if
            thread_valid[gen_thread] &&  // this thread slot is not vacant, and
          ((S_AID[P_THREAD_ID_WIDTH_M1-1:0]) == active_id[gen_thread*C_ID_WIDTH+:P_THREAD_ID_WIDTH_M1]);  // the requested ID matches the active ID for this thread.
          assign s_avalid_en[gen_thread] =  // The current request is qualified against this thread slot if
            (~aid_match[gen_thread]) ||  // This thread slot is not active for the requested ID, or
            ((m_atarget_enc_i == active_target[gen_thread*8+:P_NUM_M_DE_LOG]) &&  // this outstanding transaction was to the same target and
            (m_aregion_i == active_region[gen_thread*8+:4]));  // to the same region.
          
          // cmd_push points to the position of either the active thread for the requested ID or the lowest vacant thread slot.
          assign accum_push[gen_thread+1] = accum_push[gen_thread] | ~thread_valid[gen_thread];
          assign cmd_push[gen_thread] = any_push & (aid_match[gen_thread] | ((~any_aid_match) & ~thread_valid[gen_thread] & ~accum_push[gen_thread]));
          
          // cmd_pop points to the position of the active thread that matches the current RID.
        assign rid_match[gen_thread] = thread_valid[gen_thread] & ((s_rid_i[P_THREAD_ID_WIDTH_M1-1:0]) == active_id[gen_thread*C_ID_WIDTH+:P_THREAD_ID_WIDTH_M1]);
          assign cmd_pop[gen_thread] = any_pop & rid_match[gen_thread];
        
          always @(posedge ACLK) begin
            if (ARESET) begin
              active_id[gen_thread*C_ID_WIDTH+:C_ID_WIDTH] <= 0;
              active_target[gen_thread*8+:8] <= 0;
              active_region[gen_thread*8+:8] <= 0;
              active_cnt[gen_thread*8+:8] <= 0; 
            end else begin
              if (cmd_push[gen_thread]) begin
              active_id[gen_thread*C_ID_WIDTH+:P_THREAD_ID_WIDTH_M1] <= S_AID[P_THREAD_ID_WIDTH_M1-1:0];
                active_target[gen_thread*8+:P_NUM_M_DE_LOG] <= m_atarget_enc_i;
                active_region[gen_thread*8+:4] <= m_aregion_i;
                if (~cmd_pop[gen_thread]) begin
                  active_cnt[gen_thread*8+:C_ACCEPTANCE_LOG+1] <= active_cnt[gen_thread*8+:C_ACCEPTANCE_LOG+1] + 1;
                end
              end else if (cmd_pop[gen_thread]) begin
                  active_cnt[gen_thread*8+:C_ACCEPTANCE_LOG+1] <= active_cnt[gen_thread*8+:C_ACCEPTANCE_LOG+1] - 1;
              end
            end 
          end  // Clocked process
            
        if (C_DEBUG) begin : gen_debug_r_multi_thread
            // DEBUG READ BEAT COUNTER (only meaningful for R-channel)
            always @(posedge ACLK) begin
              if (ARESET) begin
                debug_r_beat_cnt_i[gen_thread*8+:8] <= 0;
              end else if (C_DIR == P_READ) begin
                if (s_rvalid_i & S_RREADY & rid_match[gen_thread]) begin
                  if (s_rlast_i) begin
                    debug_r_beat_cnt_i[gen_thread*8+:8] <= 0;
                  end else begin
                    debug_r_beat_cnt_i[gen_thread*8+:8] <= debug_r_beat_cnt_i[gen_thread*8+:8] + 1;
                  end
                end
              end else begin
                debug_r_beat_cnt_i[gen_thread*8+:8] <= 0;            
              end
            end  // Clocked process
            
            // DEBUG R-CHANNEL TRANSACTION SEQUENCE FIFO
            axi_data_fifo_v2_1_18_axic_srl_fifo #
              (
               .C_FAMILY          (C_FAMILY),
               .C_FIFO_WIDTH      (8),
               .C_FIFO_DEPTH_LOG  (C_ACCEPTANCE_LOG+1),
               .C_USE_FULL        (0)
               )
            debug_r_seq_fifo_multi_thread
                (
                 .ACLK    (ACLK),
                 .ARESET  (ARESET),
                 .S_MESG  (DEBUG_A_TRANS_SEQ),
                 .S_VALID (cmd_push[gen_thread]),
                 .S_READY (),
                 .M_MESG  (debug_r_trans_seq_i[gen_thread*8+:8]),
                 .M_VALID (),
                 .M_READY (cmd_pop[gen_thread])
                );
        end  // gen_debug_r_multi_thread
      end  // Next gen_thread_loop
            
    end  // thread control
        
  endgenerate
endmodule

`default_nettype wire


// -- (c) Copyright 2010 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// Description: AXI Splitter
// Each transfer received on the AXI handshake slave port is replicated onto 
//   each of the master ports, and is completed back to the slave (S_READY) 
//   once all master ports have completed.
//   
// M_VALID is asserted combinatorially from S_VALID assertion.
// Each M_VALID is masked off beginning the cycle after each M_READY is
//   received (if S_READY remains low) until the cycle after both S_VALID
//   and S_READY are asserted.
// S_READY is asserted combinatorially when the last (or all) of the M_READY
//   inputs have been received.
// If all M_READYs are asserted when S_VALID is asserted, back-to-back
//   handshakes can occur without bubble cycles.
//
// Verilog-standard:  Verilog 2001
//--------------------------------------------------------------------------
//
// Structure:
//   splitter
//
//--------------------------------------------------------------------------
`timescale 1ps/1ps

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_splitter #
  (
   parameter integer C_NUM_M = 2  // Number of master ports = [2:16]
   )
  (
   // Global Signals
   input  wire                             ACLK,
   input  wire                             ARESET,
   // Slave  Port
   input  wire                             S_VALID,
   output wire                             S_READY,
   // Master Ports
   output wire [C_NUM_M-1:0]               M_VALID,
   input  wire [C_NUM_M-1:0]               M_READY
   );

   reg  [C_NUM_M-1:0] m_ready_d = 0;
   wire               s_ready_i;
   wire [C_NUM_M-1:0] m_valid_i;

   always @(posedge ACLK) begin
      if (ARESET | s_ready_i) m_ready_d <= {C_NUM_M{1'b0}};
      else                    m_ready_d <= m_ready_d | (m_valid_i & M_READY);
   end

   assign s_ready_i = &(m_ready_d | M_READY);
   assign m_valid_i = {C_NUM_M{S_VALID}} & ~m_ready_d;
   assign M_VALID = m_valid_i;
   assign S_READY = s_ready_i;

endmodule


// -- (c) Copyright 2009 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// File name: wdata_mux.v
//
// Description: 
//   Contains MI-side write command queue.
//   SI-slot index selected by AW arbiter is pushed onto queue when S_AVALID transfer is received.
//   Queue is popped when WLAST data beat is transferred.
//   W-channel input from SI-slot selected by queue output is transferred to MI-side output .
//--------------------------------------------------------------------------
//
// Structure:
//    wdata_mux
//      axic_reg_srl_fifo
//      mux_enc
//      
//-----------------------------------------------------------------------------

`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_wdata_mux #
  (
   parameter         C_FAMILY       = "none", // FPGA Family.
   parameter integer C_WMESG_WIDTH            =  1, // Width of W-channel payload.
   parameter integer C_NUM_SLAVE_SLOTS     =  1, // Number of S_* ports.
   parameter integer C_SELECT_WIDTH      =  1, // Width of ASELECT.
   parameter integer C_FIFO_DEPTH_LOG     =  0 // Queue depth = 2**C_FIFO_DEPTH_LOG.
   )
  (
   // System Signals
   input  wire                                        ACLK,
   input  wire                                        ARESET,
   // Slave Data Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_WMESG_WIDTH-1:0]     S_WMESG,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                S_WLAST,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                S_WVALID,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                S_WREADY,
   // Master Data Ports
   output wire [C_WMESG_WIDTH-1:0]                       M_WMESG,
   output wire                                        M_WLAST,
   output wire                                        M_WVALID,
   input  wire                                        M_WREADY,
   // Write Command Ports
   input  wire [C_SELECT_WIDTH-1:0]                 S_ASELECT,  // SI-slot index from AW arbiter
   input  wire                                        S_AVALID,
   output wire                                        S_AREADY
   );

  localparam integer P_FIFO_DEPTH_LOG = (C_FIFO_DEPTH_LOG <= 5) ? C_FIFO_DEPTH_LOG : 5;  // Max depth = 32
  
  // Decode select input to 1-hot
  function [C_NUM_SLAVE_SLOTS-1:0] f_decoder (
      input [C_SELECT_WIDTH-1:0] sel
    );
    integer i;
    begin
      for (i=0; i<C_NUM_SLAVE_SLOTS; i=i+1) begin
        f_decoder[i] = (sel == i);
      end
    end
  endfunction

  wire                                          m_valid_i;
  wire                                          m_last_i;
  wire [C_NUM_SLAVE_SLOTS-1:0]             m_select_hot;
  wire [C_SELECT_WIDTH-1:0]                 m_select_enc;
  wire                                          m_avalid;
  wire                                          m_aready;
  
  generate
    if (C_NUM_SLAVE_SLOTS>1) begin : gen_wmux
      // SI-side write command queue
      axi_data_fifo_v2_1_18_axic_reg_srl_fifo #
        (
         .C_FAMILY          (C_FAMILY),
         .C_FIFO_WIDTH      (C_SELECT_WIDTH),
         .C_FIFO_DEPTH_LOG  (P_FIFO_DEPTH_LOG),
         .C_USE_FULL        (0)
         )
        wmux_aw_fifo
          (
           .ACLK    (ACLK),
           .ARESET  (ARESET),
           .S_MESG  (S_ASELECT),
           .S_VALID (S_AVALID),
           .S_READY (S_AREADY),
           .M_MESG  (m_select_enc),
           .M_VALID (m_avalid),
           .M_READY (m_aready)
           );
    
      assign m_select_hot = f_decoder(m_select_enc);
      
      // Instantiate MUX
      generic_baseblocks_v2_1_0_mux_enc # 
        (
         .C_FAMILY      ("rtl"),
         .C_RATIO       (C_NUM_SLAVE_SLOTS),
         .C_SEL_WIDTH   (C_SELECT_WIDTH),
         .C_DATA_WIDTH  (C_WMESG_WIDTH)
        ) mux_w 
        (
         .S   (m_select_enc),
         .A   (S_WMESG),
         .O   (M_WMESG),
         .OE  (1'b1)
        ); 
        
      assign m_last_i  = |(S_WLAST & m_select_hot);
      assign m_valid_i = |(S_WVALID & m_select_hot);
      
      assign m_aready = m_valid_i & m_avalid & m_last_i & M_WREADY;
      assign M_WLAST = m_last_i;
      assign M_WVALID = m_valid_i & m_avalid;
      assign S_WREADY = m_select_hot & {C_NUM_SLAVE_SLOTS{m_avalid & M_WREADY}};
    end else begin : gen_no_wmux
      assign S_AREADY = 1'b1;
      assign M_WVALID = S_WVALID;
      assign S_WREADY = M_WREADY;
      assign M_WLAST = S_WLAST;
      assign M_WMESG = S_WMESG;
    end
  endgenerate
  
endmodule

`default_nettype wire


// -- (c) Copyright 2009 - 2011 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
// -- (including loss of data, profits, goodwill, or any type of
// -- loss or damage suffered as a result of any action brought
// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
// -- performance, such as life-support or safety devices or
// -- systems, Class III medical devices, nuclear facilities,
// -- applications related to the deployment of airbags, or any
// -- other applications that could lead to death, personal
// -- injury, or severe property or environmental damage
// -- (individually and collectively, "Critical
// -- Applications"). Customer assumes the sole risk and
// -- liability of any use of Xilinx products in Critical
// -- Applications, subject only to applicable laws and
// -- regulations governing limitations on product liability.
// --
// -- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
// -- PART OF THIS FILE AT ALL TIMES.
//-----------------------------------------------------------------------------
//
// File name: wdata_router.v
//
// Description: 
//   Contains SI-side write command queue.
//   Target MI-slot index is pushed onto queue when S_AVALID transfer is received.
//   Queue is popped when WLAST data beat is transferred.
//   W-channel input is transferred to MI-slot output selected by queue output.
//--------------------------------------------------------------------------
//
// Structure:
//    wdata_router
//      axic_reg_srl_fifo
//      
//-----------------------------------------------------------------------------

`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_wdata_router #
  (
   parameter         C_FAMILY       = "none", // FPGA Family.
   parameter integer C_WMESG_WIDTH          = 1, // Width of all data signals
   parameter integer C_NUM_MASTER_SLOTS     = 1, // Number of M_* ports.
   parameter integer C_SELECT_WIDTH     =  1, // Width of S_ASELECT.
   parameter integer C_FIFO_DEPTH_LOG     =  0 // Queue depth = 2**C_FIFO_DEPTH_LOG.
   )
  (
   // System Signals
   input  wire                                        ACLK,
   input  wire                                        ARESET,
   // Slave Data Ports
   input  wire [C_WMESG_WIDTH-1:0]                    S_WMESG,
   input  wire                                        S_WLAST,
   input  wire                                        S_WVALID,
   output wire                                        S_WREADY,
   // Master Data Ports
   output wire [C_WMESG_WIDTH-1:0]                    M_WMESG,  // Broadcast to all MI-slots
   output wire                                        M_WLAST,  // Broadcast to all MI-slots
   output wire [C_NUM_MASTER_SLOTS-1:0]               M_WVALID,  // Per MI-slot
   input  wire [C_NUM_MASTER_SLOTS-1:0]               M_WREADY,  // Per MI-slot
   // Address Arbiter Ports
   input  wire [C_SELECT_WIDTH-1:0]                   S_ASELECT,  // Target MI-slot index from SI-side AW command
   input  wire                                        S_AVALID,
   output wire                                        S_AREADY
   );

  localparam integer P_FIFO_DEPTH_LOG = (C_FIFO_DEPTH_LOG <= 5) ? C_FIFO_DEPTH_LOG : 5;  // Max depth = 32

  // Decode select input to 1-hot
  function [C_NUM_MASTER_SLOTS-1:0] f_decoder (
      input [C_SELECT_WIDTH-1:0] sel
    );
    integer i;
    begin
      for (i=0; i<C_NUM_MASTER_SLOTS; i=i+1) begin
        f_decoder[i] = (sel == i);
      end
    end
  endfunction

  //---------------------------------------------------------------------------
  // Internal signal declarations
  //---------------------------------------------------------------------------
  wire [C_NUM_MASTER_SLOTS-1:0]             m_select_hot;
  wire [C_SELECT_WIDTH-1:0]                 m_select_enc;
  wire                                          m_avalid;
  wire                                          m_aready;
  
  //---------------------------------------------------------------------------
  // Router
  //---------------------------------------------------------------------------

  // SI-side write command queue
  axi_data_fifo_v2_1_18_axic_reg_srl_fifo #
    (
     .C_FAMILY          (C_FAMILY),
     .C_FIFO_WIDTH      (C_SELECT_WIDTH),
     .C_FIFO_DEPTH_LOG  (P_FIFO_DEPTH_LOG),
     .C_USE_FULL        (1)
     )
    wrouter_aw_fifo
      (
       .ACLK    (ACLK),
       .ARESET  (ARESET),
       .S_MESG  (S_ASELECT),
       .S_VALID (S_AVALID),
       .S_READY (S_AREADY),
       .M_MESG  (m_select_enc),
       .M_VALID (m_avalid),
       .M_READY (m_aready)
       );

  assign m_select_hot = f_decoder(m_select_enc);
  
  // W-channel payload and LAST are broadcast to all MI-slot's W-mux
  assign M_WMESG   = S_WMESG;
  assign M_WLAST =   S_WLAST;
  
  // Assert m_aready when last beat acknowledged by slave
  assign m_aready = m_avalid & S_WVALID & S_WLAST & (|(M_WREADY & m_select_hot));

  // M_WVALID is generated per MI-slot (including error handler at slot C_NUM_MASTER_SLOTS).
  // The slot selected by the head of the queue (m_select_enc) is enabled.
  assign M_WVALID = {C_NUM_MASTER_SLOTS{S_WVALID & m_avalid}} & m_select_hot;

  // S_WREADY is muxed from the MI slot selected by the head of the queue (m_select_enc).
  assign S_WREADY = m_avalid & (|(M_WREADY & m_select_hot));
  
endmodule

`default_nettype wire


// -- (c) Copyright 2011-2014 Xilinx, Inc. All rights reserved.
// --
// -- This file contains confidential and proprietary information
// -- of Xilinx, Inc. and is protected under U.S. and 
// -- international copyright and other intellectual property
// -- laws.
// --
// -- DISCLAIMER
// -- This disclaimer is not a license and does not grant any
// -- rights to the materials distributed herewith. Except as
// -- otherwise provided in a valid license issued to you by
// -- Xilinx, and to the maximum extent permitted by applicable
// -- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
// -- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
// -- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
// -- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
// -- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
// -- (2) Xilinx shall not be liable (whether in contract or tort,
// -- including negligence, or under any other theory of
// -- liability) for any loss or damage of any kind or nature
// -- related to, arising under or in connection with these
// -- materials, including for any direct, or any indirect,
// -- special, incidental, or consequential loss or damage
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// -- by a third party) even if such damage or loss was
// -- reasonably foreseeable or Xilinx had been advised of the
// -- possibility of the same.
// --
// -- CRITICAL APPLICATIONS
// -- Xilinx products are not designed or intended to be fail-
// -- safe, or for use in any application requiring fail-safe
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//-----------------------------------------------------------------------------
//
// File name: axi_crossbar.v
//-----------------------------------------------------------------------------
`timescale 1ps/1ps
`default_nettype none

(* DowngradeIPIdentifiedWarnings="yes" *) 
module axi_crossbar_v2_1_20_axi_crossbar # (
   parameter         C_FAMILY                         = "rtl", 
                       // FPGA Base Family. Current version: virtex6 or spartan6.
   parameter integer C_NUM_SLAVE_SLOTS                = 1, 
                       // Number of Slave Interface (SI) slots for connecting 
                       // to master IP. Range: 1-16.
   parameter integer C_NUM_MASTER_SLOTS               = 2, 
                       // Number of Master Interface (MI) slots for connecting 
                       // to slave IP. Range: 1-16.                       
   parameter integer C_AXI_ID_WIDTH                   = 1, 
                       // Width of ID signals propagated by the Interconnect.
                       // Width of ID signals produced on all MI slots.
                       // Range: 1-32.
   parameter integer C_AXI_ADDR_WIDTH                 = 32, 
                       // Width of s_axi_awaddr, s_axi_araddr, m_axi_awaddr and 
                       // m_axi_araddr for all SI/MI slots.
                       // Range: 1-64.
   parameter integer C_AXI_DATA_WIDTH        = 32, 
                       // Data width of the internal interconnect write and read 
                       // data paths.
                       // Range: 32, 64, 128, 256, 512, 1024.
   parameter integer C_AXI_PROTOCOL                 = 0, 
                       // 0 = "AXI4",
                       // 1 = "AXI3", 
                       // 2 = "AXI4LITE"
                       //   Propagate WID only when C_AXI_PROTOCOL = 1.
   parameter integer C_NUM_ADDR_RANGES = 1,
                       // Number of BASE/HIGH_ADDR pairs per MI slot.
                       // Range: 1-16.
   parameter [C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64-1:0] C_M_AXI_BASE_ADDR = 128'h00000000001000000000000000000000,
                       // Base address of each range of each MI slot. 
                       // For unused ranges, set C_M_AXI_BASE_ADDR[mm*aa*64 +: C_AXI_ADDR_WIDTH] = {C_AXI_ADDR_WIDTH{1'b1}}. 
                       //   (Bit positions above C_AXI_ADDR_WIDTH are ignored.)
                       // Format: C_NUM_MASTER_SLOTS{C_NUM_ADDR_RANGES{Bit64}}.
   parameter [C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*32-1:0] C_M_AXI_ADDR_WIDTH = 64'H0000000c0000000c, 
                       // Number of low-order address bits that are used to select locations within each address range of each MI slot.
                       // The High address of each range is derived as BASE_ADDR + 2**C_M_AXI_ADDR_WIDTH -1.
                       // For used address ranges, C_M_AXI_ADDR_WIDTH must be > 0.
                       // For unused ranges, set C_M_AXI_ADDR_WIDTH to 32'h00000000.
                       // Format: C_NUM_MASTER_SLOTS{C_NUM_ADDR_RANGES{Bit32}}.
                       // Range: 0 - C_AXI_ADDR_WIDTH.
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_BASE_ID = 32'h00000000,
                       // Base ID of each SI slot. 
                       // Format: C_NUM_SLAVE_SLOTS{Bit32};
                       // Range: 0 to 2**C_AXI_ID_WIDTH-1.
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_THREAD_ID_WIDTH = 32'h00000000,
                       // Number of low-order ID bits a connected master may vary to select a transaction thread.
                       // Format: C_NUM_SLAVE_SLOTS{Bit32};
                       // Range: 0 - C_AXI_ID_WIDTH.
   parameter integer C_AXI_SUPPORTS_USER_SIGNALS      = 0,
                       // 1 = Propagate all USER signals, 0 = Dont propagate.
   parameter integer C_AXI_AWUSER_WIDTH               = 1,
                       // Width of AWUSER signals for all SI slots and MI slots. 
                       // Range: 1-1024.
   parameter integer C_AXI_ARUSER_WIDTH               = 1,
                       // Width of ARUSER signals for all SI slots and MI slots. 
                       // Range: 1-1024.
   parameter integer C_AXI_WUSER_WIDTH                = 1,
                       // Width of WUSER signals for all SI slots and MI slots. 
                       // Range: 1-1024.
   parameter integer C_AXI_RUSER_WIDTH                = 1,
                       // Width of RUSER signals for all SI slots and MI slots. 
                       // Range: 1-1024.
   parameter integer C_AXI_BUSER_WIDTH                = 1,
                       // Width of BUSER signals for all SI slots and MI slots. 
                       // Range: 1-1024.
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_WRITE_CONNECTIVITY = 64'hFFFFFFFFFFFFFFFF,
                       // Multi-pathway write connectivity from each SI slot (N) to each 
                       // MI slot (M):
                       // 0 = no pathway required; 1 = pathway required. (Valid only for SAMD)
                       // Format: C_NUM_MASTER_SLOTS{Bit32}; 
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_READ_CONNECTIVITY = 64'hFFFFFFFFFFFFFFFF,
                       // Multi-pathway read connectivity from each SI slot (N) to each 
                       // MI slot (M):
                       // 0 = no pathway required; 1 = pathway required. (Valid only for SAMD)
                       // Format: C_NUM_MASTER_SLOTS{Bit32}; 
   parameter integer C_R_REGISTER               = 0,
                       // Insert register slice on R channel in the crossbar. (Valid only for SASD)
                       // Range: Reg-slice type (0-8).
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_SINGLE_THREAD                 = 32'h00000000, 
                       // 0 = Implement separate command queues per ID thread.
                       // 1 = Force corresponding SI slot to be single-threaded. (Valid only for SAMD)
                       // Format: C_NUM_SLAVE_SLOTS{Bit32}; 
                       // Range: 0, 1
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_WRITE_ACCEPTANCE         = 32'H00000002,
                       // Maximum number of active write transactions that each SI 
                       // slot can accept. (Valid only for SAMD)
                       // Format: C_NUM_SLAVE_SLOTS{Bit32}; 
                       // Range: 1-32.
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_READ_ACCEPTANCE          = 32'H00000002,
                       // Maximum number of active read transactions that each SI 
                       // slot can accept. (Valid only for SAMD)
                       // Format: C_NUM_SLAVE_SLOTS{Bit32};
                       // Range: 1-32.
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_WRITE_ISSUING            = 64'H0000000400000004,
                       // Maximum number of data-active write transactions that 
                       // each MI slot can generate at any one time. (Valid only for SAMD)
                       // Format: C_NUM_MASTER_SLOTS{Bit32};
                       // Range: 1-32.
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_READ_ISSUING            = 64'H0000000400000004,
                       // Maximum number of active read transactions that 
                       // each MI slot can generate at any one time. (Valid only for SAMD)
                       // Format: C_NUM_MASTER_SLOTS{Bit32};
                       // Range: 1-32.
   parameter [C_NUM_SLAVE_SLOTS*32-1:0] C_S_AXI_ARB_PRIORITY             = 32'h00000000,
                       // Arbitration priority among each SI slot. 
                       // Higher values indicate higher priority.
                       // Format: C_NUM_SLAVE_SLOTS{Bit32};
                       // Range: 0-15.
   parameter [C_NUM_MASTER_SLOTS*32-1:0] C_M_AXI_SECURE                   = 32'h00000000,
                       // Indicates whether each MI slot connects to a secure slave 
                       // (allows only TrustZone secure access).
                       // Format: C_NUM_MASTER_SLOTS{Bit32}.
                       // Range: 0, 1
   parameter integer C_CONNECTIVITY_MODE = 1
                       // 0 = Shared-Address Shared-Data (SASD).
                       // 1 = Shared-Address Multi-Data (SAMD).
                       // Default 1 (on) for simulation; default 0 (off) for implementation.
)
(
   // Global Signals
   input  wire                                                    aclk,
   input  wire                                                    aresetn,
   // Slave Interface Write Address Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]             s_axi_awid,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]           s_axi_awaddr,
   input  wire [C_NUM_SLAVE_SLOTS*((C_AXI_PROTOCOL == 1) ? 4 : 8)-1:0] s_axi_awlen,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          s_axi_awsize,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          s_axi_awburst,
   input  wire [C_NUM_SLAVE_SLOTS*((C_AXI_PROTOCOL == 1) ? 2 : 1)-1:0] s_axi_awlock,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          s_axi_awcache,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          s_axi_awprot,
//   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          s_axi_awregion,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          s_axi_awqos,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_AWUSER_WIDTH-1:0]         s_axi_awuser,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_awvalid,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_awready,
   // Slave Interface Write Data Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]             s_axi_wid,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH-1:0]           s_axi_wdata,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH/8-1:0]         s_axi_wstrb,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_wlast,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_WUSER_WIDTH-1:0]          s_axi_wuser,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_wvalid,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_wready,
   // Slave Interface Write Response Ports
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]             s_axi_bid,
   output wire [C_NUM_SLAVE_SLOTS*2-1:0]                          s_axi_bresp,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_BUSER_WIDTH-1:0]          s_axi_buser,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_bvalid,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_bready,
   // Slave Interface Read Address Ports
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]             s_axi_arid,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]           s_axi_araddr,
   input  wire [C_NUM_SLAVE_SLOTS*((C_AXI_PROTOCOL == 1) ? 4 : 8)-1:0] s_axi_arlen,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          s_axi_arsize,
   input  wire [C_NUM_SLAVE_SLOTS*2-1:0]                          s_axi_arburst,
   input  wire [C_NUM_SLAVE_SLOTS*((C_AXI_PROTOCOL == 1) ? 2 : 1)-1:0] s_axi_arlock,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          s_axi_arcache,
   input  wire [C_NUM_SLAVE_SLOTS*3-1:0]                          s_axi_arprot,
//   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          s_axi_arregion,
   input  wire [C_NUM_SLAVE_SLOTS*4-1:0]                          s_axi_arqos,
   input  wire [C_NUM_SLAVE_SLOTS*C_AXI_ARUSER_WIDTH-1:0]         s_axi_aruser,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_arvalid,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_arready,
   // Slave Interface Read Data Ports
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]             s_axi_rid,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH-1:0]           s_axi_rdata,
   output wire [C_NUM_SLAVE_SLOTS*2-1:0]                          s_axi_rresp,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_rlast,
   output wire [C_NUM_SLAVE_SLOTS*C_AXI_RUSER_WIDTH-1:0]          s_axi_ruser,
   output wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_rvalid,
   input  wire [C_NUM_SLAVE_SLOTS-1:0]                            s_axi_rready,
   // Master Interface Write Address Port
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]            m_axi_awid,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ADDR_WIDTH-1:0]          m_axi_awaddr,
   output wire [C_NUM_MASTER_SLOTS*((C_AXI_PROTOCOL == 1) ? 4 : 8)-1:0] m_axi_awlen,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         m_axi_awsize,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         m_axi_awburst,
   output wire [C_NUM_MASTER_SLOTS*((C_AXI_PROTOCOL == 1) ? 2 : 1)-1:0] m_axi_awlock,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         m_axi_awcache,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         m_axi_awprot,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         m_axi_awregion,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         m_axi_awqos,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_AWUSER_WIDTH-1:0]        m_axi_awuser,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_awvalid,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_awready,
   // Master Interface Write Data Ports
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]            m_axi_wid,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH-1:0]          m_axi_wdata,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH/8-1:0]        m_axi_wstrb,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_wlast,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_WUSER_WIDTH-1:0]         m_axi_wuser,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_wvalid,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_wready,
   // Master Interface Write Response Ports
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]            m_axi_bid,
   input  wire [C_NUM_MASTER_SLOTS*2-1:0]                         m_axi_bresp,
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH-1:0]         m_axi_buser,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_bvalid,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_bready,
   // Master Interface Read Address Port
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]            m_axi_arid,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ADDR_WIDTH-1:0]          m_axi_araddr,
   output wire [C_NUM_MASTER_SLOTS*((C_AXI_PROTOCOL == 1) ? 4 : 8)-1:0] m_axi_arlen,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         m_axi_arsize,
   output wire [C_NUM_MASTER_SLOTS*2-1:0]                         m_axi_arburst,
   output wire [C_NUM_MASTER_SLOTS*((C_AXI_PROTOCOL == 1) ? 2 : 1)-1:0] m_axi_arlock,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         m_axi_arcache,
   output wire [C_NUM_MASTER_SLOTS*3-1:0]                         m_axi_arprot,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         m_axi_arregion,
   output wire [C_NUM_MASTER_SLOTS*4-1:0]                         m_axi_arqos,
   output wire [C_NUM_MASTER_SLOTS*C_AXI_ARUSER_WIDTH-1:0]        m_axi_aruser,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_arvalid,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_arready,
   // Master Interface Read Data Ports
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]            m_axi_rid,
   input  wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH-1:0]          m_axi_rdata,
   input  wire [C_NUM_MASTER_SLOTS*2-1:0]                         m_axi_rresp,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_rlast,
   input wire [C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH-1:0]          m_axi_ruser,
   input  wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_rvalid,
   output wire [C_NUM_MASTER_SLOTS-1:0]                           m_axi_rready
);

  localparam [64:0] P_ONES = {65{1'b1}};
  localparam [C_NUM_SLAVE_SLOTS*64-1:0] P_S_AXI_BASE_ID = f_base_id(0);
  localparam [C_NUM_SLAVE_SLOTS*64-1:0] P_S_AXI_HIGH_ID = f_high_id(0);
  localparam integer  P_AXI4 = 0;
  localparam integer  P_AXI3 = 1;
  localparam integer  P_AXILITE = 2;
  localparam [2:0]   P_AXILITE_SIZE = 3'b010;
  localparam [1:0]   P_INCR = 2'b01;
  localparam [C_NUM_MASTER_SLOTS-1:0] P_M_AXI_SUPPORTS_WRITE = f_m_supports_write(0);
  localparam [C_NUM_MASTER_SLOTS-1:0] P_M_AXI_SUPPORTS_READ = f_m_supports_read(0);
  localparam [C_NUM_SLAVE_SLOTS-1:0] P_S_AXI_SUPPORTS_WRITE = f_s_supports_write(0);
  localparam [C_NUM_SLAVE_SLOTS-1:0] P_S_AXI_SUPPORTS_READ = f_s_supports_read(0);
  localparam integer C_DEBUG              = 1;
  localparam integer P_RANGE_CHECK                    = 1;
                       // 1 (non-zero) = Detect and issue DECERR on the following conditions:
                       //   a. address range mismatch (no valid MI slot)
                       //   b. Burst or >32-bit transfer to AxiLite slave
                       //   c. TrustZone access violation
                       //   d. R/W direction unsupported by target
                       // 0 = Pass all transactions (no DECERR):
                       //   a. Omit DECERR detection and response logic
                       //   b. Omit address decoder and propagate s_axi_a*REGION to m_axi_a*REGION
                       //      when C_NUM_MASTER_SLOTS=1 and C_NUM_ADDR_RANGES=1.
                       //   c. Unpredictable target MI-slot if address mismatch and >1 MI-slot
                       //   d. Transaction corruption if any burst or >32-bit transfer to AxiLite slave
                       // Illegal combination: P_RANGE_CHECK = 0 && C_M_AXI_SECURE != 0.
  localparam integer P_ADDR_DECODE = ((P_RANGE_CHECK == 1) || (C_NUM_MASTER_SLOTS > 1) || (C_NUM_ADDR_RANGES > 1)) ? 1 : 0;  // Always 1
  localparam [C_NUM_MASTER_SLOTS*32-1:0] P_M_AXI_ERR_MODE            = {C_NUM_MASTER_SLOTS{32'h00000000}};
                       // Transaction error detection (per MI-slot)
                       // 0 = None; 1 = AXI4Lite burst violation
                       // Format: C_NUM_MASTER_SLOTS{Bit32};
  localparam integer P_LEN = (C_AXI_PROTOCOL == P_AXI3) ? 4 : 8;
  localparam integer P_LOCK = (C_AXI_PROTOCOL == P_AXI3) ? 2 : 1;
  localparam P_FAMILY = ((C_FAMILY == "virtex7") || (C_FAMILY == "kintex7") || (C_FAMILY == "artix7") || (C_FAMILY == "zynq")) ? C_FAMILY : "rtl";

  function integer f_ceil_log2
    (
     input integer x
     );
    integer acc;
    begin
      acc=0;
      while ((2**acc) < x)
        acc = acc + 1;
      f_ceil_log2 = acc;
    end
  endfunction

  // Widths of all write issuance counters implemented in axi_crossbar_v2_1_20_crossbar (before counter carry-out bit)
  function [(C_NUM_MASTER_SLOTS+1)*32-1:0] f_write_issue_width_vec
    (input null_arg);
    integer mi;
    reg [(C_NUM_MASTER_SLOTS+1)*32-1:0] result;
    begin
      result = 0;
      for (mi=0; mi<C_NUM_MASTER_SLOTS; mi=mi+1) begin
        result[mi*32+:32] = (C_AXI_PROTOCOL == P_AXILITE) ? 32'h0 : f_ceil_log2(C_M_AXI_WRITE_ISSUING[mi*32+:32]);
      end
      result[C_NUM_MASTER_SLOTS*32+:32] = 32'h0;
      f_write_issue_width_vec = result;
    end
  endfunction

  // Widths of all read issuance counters implemented in axi_crossbar_v2_1_20_crossbar (before counter carry-out bit)
  function [(C_NUM_MASTER_SLOTS+1)*32-1:0] f_read_issue_width_vec
    (input null_arg);
    integer mi;
    reg [(C_NUM_MASTER_SLOTS+1)*32-1:0] result;
    begin
      result = 0;
      for (mi=0; mi<C_NUM_MASTER_SLOTS; mi=mi+1) begin
        result[mi*32+:32] = (C_AXI_PROTOCOL == P_AXILITE) ? 32'h0 : f_ceil_log2(C_M_AXI_READ_ISSUING[mi*32+:32]);
      end
      result[C_NUM_MASTER_SLOTS*32+:32] = 32'h0;
      f_read_issue_width_vec = result;
    end
  endfunction

  // Widths of all write acceptance counters implemented in axi_crossbar_v2_1_20_crossbar (before counter carry-out bit)
  function [C_NUM_SLAVE_SLOTS*32-1:0] f_write_accept_width_vec
    (input null_arg);
    integer si;
    reg [C_NUM_SLAVE_SLOTS*32-1:0] result;
    begin
      result = 0;
      for (si=0; si<C_NUM_SLAVE_SLOTS; si=si+1) begin
        result[si*32+:32] = (C_AXI_PROTOCOL == P_AXILITE) ? 32'h0 : f_ceil_log2(C_S_AXI_WRITE_ACCEPTANCE[si*32+:32]);
      end
      f_write_accept_width_vec = result;
    end
  endfunction

  // Widths of all read acceptance counters implemented in axi_crossbar_v2_1_20_crossbar (before counter carry-out bit)
  function [C_NUM_SLAVE_SLOTS*32-1:0] f_read_accept_width_vec
    (input null_arg);
    integer si;
    reg [C_NUM_SLAVE_SLOTS*32-1:0] result;
    begin
      result = 0;
      for (si=0; si<C_NUM_SLAVE_SLOTS; si=si+1) begin
        result[si*32+:32] = (C_AXI_PROTOCOL == P_AXILITE) ? 32'h0 : f_ceil_log2(C_S_AXI_READ_ACCEPTANCE[si*32+:32]);
      end
      f_read_accept_width_vec = result;
    end
  endfunction

  // Convert C_S_AXI_BASE_ID vector from Bit32 to Bit64 format
  function [C_NUM_SLAVE_SLOTS*64-1:0] f_base_id
    (input null_arg);
    integer si;
    reg [C_NUM_SLAVE_SLOTS*64-1:0] result;
    begin
      result = 0;
      for (si=0; si<C_NUM_SLAVE_SLOTS; si=si+1) begin
        result[si*64+:C_AXI_ID_WIDTH] = C_S_AXI_BASE_ID[si*32+:C_AXI_ID_WIDTH];
      end
      f_base_id = result;
    end
  endfunction

  // Construct P_S_HIGH_ID vector
  function [C_NUM_SLAVE_SLOTS*64-1:0] f_high_id
    (input null_arg);
    integer si;
    reg [C_NUM_SLAVE_SLOTS*64-1:0] result;
    begin
      result = 0;
      for (si=0; si<C_NUM_SLAVE_SLOTS; si=si+1) begin
        result[si*64+:C_AXI_ID_WIDTH] = (C_S_AXI_THREAD_ID_WIDTH[si*32+:32] == 0) ? C_S_AXI_BASE_ID[si*32+:C_AXI_ID_WIDTH] :
          ({1'b0, C_S_AXI_THREAD_ID_WIDTH[si*32+:31]} >= C_AXI_ID_WIDTH) ? {C_AXI_ID_WIDTH{1'b1}} :
          (C_S_AXI_BASE_ID[si*32+:C_AXI_ID_WIDTH] | ~(P_ONES << {1'b0, C_S_AXI_THREAD_ID_WIDTH[si*32+:6]}));
      end
      f_high_id = result;
    end
  endfunction

  // Construct P_M_HIGH_ADDR vector
  function [C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64-1:0] f_high_addr
    (input null_arg);
    integer ar;
    reg [C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64-1:0] result;
    begin
      result = {C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES*64{1'b0}};
      for (ar=0; ar<C_NUM_MASTER_SLOTS*C_NUM_ADDR_RANGES; ar=ar+1) begin
        result[ar*64+:C_AXI_ADDR_WIDTH] = (C_M_AXI_ADDR_WIDTH[ar*32+:32] == 0) ? 64'h00000000_00000000 : 
          ({1'b0, C_M_AXI_ADDR_WIDTH[ar*32+:31]} >= C_AXI_ADDR_WIDTH) ? {C_AXI_ADDR_WIDTH{1'b1}} :
          (C_M_AXI_BASE_ADDR[ar*64+:C_AXI_ADDR_WIDTH] | ~(P_ONES << {1'b0, C_M_AXI_ADDR_WIDTH[ar*32+:7]}));
      end
      f_high_addr = result;
    end
  endfunction

  // Generate a mask of valid ID bits for a given SI slot.
  function [C_AXI_ID_WIDTH-1:0] f_thread_id_mask
    (input integer si);
    begin
      f_thread_id_mask = 
        (C_S_AXI_THREAD_ID_WIDTH[si*32+:32] == 0) ? {C_AXI_ID_WIDTH{1'b0}} : 
        ({1'b0, C_S_AXI_THREAD_ID_WIDTH[si*32+:31]} >= C_AXI_ID_WIDTH) ? {C_AXI_ID_WIDTH{1'b1}} :
        ({C_AXI_ID_WIDTH{1'b0}} | ~(P_ONES << {1'b0, C_S_AXI_THREAD_ID_WIDTH[si*32+:6]}));
      end
  endfunction

  // Isolate thread bits of input S_ID and add to BASE_ID to form MI-side ID value
  //   only for end-point SI-slots
  function [C_AXI_ID_WIDTH-1:0] f_extend_ID (
    input [C_AXI_ID_WIDTH-1:0] s_id,
    input integer si
    );
    begin
      f_extend_ID = 
        (C_S_AXI_THREAD_ID_WIDTH[si*32+:32] == 0) ? C_S_AXI_BASE_ID[si*32+:C_AXI_ID_WIDTH] : 
        ({1'b0, C_S_AXI_THREAD_ID_WIDTH[si*32+:31]} >= C_AXI_ID_WIDTH) ? s_id :
        (C_S_AXI_BASE_ID[si*32+:C_AXI_ID_WIDTH] | (s_id &  ~(P_ONES << {1'b0, C_S_AXI_THREAD_ID_WIDTH[si*32+:6]})));
    end
  endfunction

  // Bit vector of SI slots with at least one write connection.
  function [C_NUM_SLAVE_SLOTS-1:0] f_s_supports_write
    (input null_arg);
    integer mi;
    reg [C_NUM_SLAVE_SLOTS-1:0] result;
    begin
      result = {C_NUM_SLAVE_SLOTS{1'b0}};
      for (mi=0; mi<C_NUM_MASTER_SLOTS; mi=mi+1) begin
        result = result | C_M_AXI_WRITE_CONNECTIVITY[mi*32+:C_NUM_SLAVE_SLOTS];
      end
      f_s_supports_write = result;
    end
  endfunction

  // Bit vector of SI slots with at least one read connection.
  function [C_NUM_SLAVE_SLOTS-1:0] f_s_supports_read
    (input null_arg);
    integer mi;
    reg [C_NUM_SLAVE_SLOTS-1:0] result;
    begin
      result = {C_NUM_SLAVE_SLOTS{1'b0}};
      for (mi=0; mi<C_NUM_MASTER_SLOTS; mi=mi+1) begin
        result = result | C_M_AXI_READ_CONNECTIVITY[mi*32+:C_NUM_SLAVE_SLOTS];
      end
      f_s_supports_read = result;
    end
  endfunction

  // Bit vector of MI slots with at least one write connection.
  function [C_NUM_MASTER_SLOTS-1:0] f_m_supports_write
    (input null_arg);
    integer mi;
    begin
      for (mi=0; mi<C_NUM_MASTER_SLOTS; mi=mi+1) begin
        f_m_supports_write[mi] = (|C_M_AXI_WRITE_CONNECTIVITY[mi*32+:C_NUM_SLAVE_SLOTS]);
      end
    end
  endfunction

  // Bit vector of MI slots with at least one read connection.
  function [C_NUM_MASTER_SLOTS-1:0] f_m_supports_read
    (input null_arg);
    integer mi;
    begin
      for (mi=0; mi<C_NUM_MASTER_SLOTS; mi=mi+1) begin
        f_m_supports_read[mi] = (|C_M_AXI_READ_CONNECTIVITY[mi*32+:C_NUM_SLAVE_SLOTS]);
      end
    end
  endfunction

  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]          si_cb_awid            ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]        si_cb_awaddr          ;
  wire [C_NUM_SLAVE_SLOTS*8-1:0]                       si_cb_awlen           ;
  wire [C_NUM_SLAVE_SLOTS*3-1:0]                       si_cb_awsize          ;
  wire [C_NUM_SLAVE_SLOTS*2-1:0]                       si_cb_awburst         ;
  wire [C_NUM_SLAVE_SLOTS*2-1:0]                       si_cb_awlock          ;
  wire [C_NUM_SLAVE_SLOTS*4-1:0]                       si_cb_awcache         ;
  wire [C_NUM_SLAVE_SLOTS*3-1:0]                       si_cb_awprot          ;
//  wire [C_NUM_SLAVE_SLOTS*4-1:0]                       si_cb_awregion        ;
  wire [C_NUM_SLAVE_SLOTS*4-1:0]                       si_cb_awqos           ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_AWUSER_WIDTH-1:0]      si_cb_awuser          ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_awvalid         ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_awready         ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]          si_cb_wid            ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH-1:0]        si_cb_wdata           ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH/8-1:0]      si_cb_wstrb           ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_wlast           ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_WUSER_WIDTH-1:0]       si_cb_wuser           ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_wvalid          ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_wready          ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]          si_cb_bid             ;
  wire [C_NUM_SLAVE_SLOTS*2-1:0]                       si_cb_bresp           ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_BUSER_WIDTH-1:0]       si_cb_buser           ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_bvalid          ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_bready          ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]          si_cb_arid            ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ADDR_WIDTH-1:0]        si_cb_araddr          ;
  wire [C_NUM_SLAVE_SLOTS*8-1:0]                       si_cb_arlen           ;
  wire [C_NUM_SLAVE_SLOTS*3-1:0]                       si_cb_arsize          ;
  wire [C_NUM_SLAVE_SLOTS*2-1:0]                       si_cb_arburst         ;
  wire [C_NUM_SLAVE_SLOTS*2-1:0]                       si_cb_arlock          ;
  wire [C_NUM_SLAVE_SLOTS*4-1:0]                       si_cb_arcache         ;
  wire [C_NUM_SLAVE_SLOTS*3-1:0]                       si_cb_arprot          ;
//  wire [C_NUM_SLAVE_SLOTS*4-1:0]                       si_cb_arregion        ;
  wire [C_NUM_SLAVE_SLOTS*4-1:0]                       si_cb_arqos           ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ARUSER_WIDTH-1:0]      si_cb_aruser          ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_arvalid         ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_arready         ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_ID_WIDTH-1:0]          si_cb_rid             ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_DATA_WIDTH-1:0]        si_cb_rdata           ;
  wire [C_NUM_SLAVE_SLOTS*2-1:0]                       si_cb_rresp           ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_rlast           ;
  wire [C_NUM_SLAVE_SLOTS*C_AXI_RUSER_WIDTH-1:0]       si_cb_ruser           ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_rvalid          ;
  wire [C_NUM_SLAVE_SLOTS-1:0]                         si_cb_rready          ;

  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]         cb_mi_awid            ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_ADDR_WIDTH-1:0]       cb_mi_awaddr          ;
  wire [C_NUM_MASTER_SLOTS*8-1:0]                      cb_mi_awlen           ;
  wire [C_NUM_MASTER_SLOTS*3-1:0]                      cb_mi_awsize          ;
  wire [C_NUM_MASTER_SLOTS*2-1:0]                      cb_mi_awburst         ;
  wire [C_NUM_MASTER_SLOTS*2-1:0]                      cb_mi_awlock          ;
  wire [C_NUM_MASTER_SLOTS*4-1:0]                      cb_mi_awcache         ;
  wire [C_NUM_MASTER_SLOTS*3-1:0]                      cb_mi_awprot          ;
  wire [C_NUM_MASTER_SLOTS*4-1:0]                      cb_mi_awregion        ;
  wire [C_NUM_MASTER_SLOTS*4-1:0]                      cb_mi_awqos           ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_AWUSER_WIDTH-1:0]     cb_mi_awuser          ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_awvalid         ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_awready         ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]         cb_mi_wid             ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH-1:0]       cb_mi_wdata           ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH/8-1:0]     cb_mi_wstrb           ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_wlast           ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_WUSER_WIDTH-1:0]      cb_mi_wuser           ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_wvalid          ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_wready          ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]         cb_mi_bid             ;
  wire [C_NUM_MASTER_SLOTS*2-1:0]                      cb_mi_bresp           ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_BUSER_WIDTH-1:0]      cb_mi_buser           ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_bvalid          ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_bready          ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]         cb_mi_arid            ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_ADDR_WIDTH-1:0]       cb_mi_araddr          ;
  wire [C_NUM_MASTER_SLOTS*8-1:0]                      cb_mi_arlen           ;
  wire [C_NUM_MASTER_SLOTS*3-1:0]                      cb_mi_arsize          ;
  wire [C_NUM_MASTER_SLOTS*2-1:0]                      cb_mi_arburst         ;
  wire [C_NUM_MASTER_SLOTS*2-1:0]                      cb_mi_arlock          ;
  wire [C_NUM_MASTER_SLOTS*4-1:0]                      cb_mi_arcache         ;
  wire [C_NUM_MASTER_SLOTS*3-1:0]                      cb_mi_arprot          ;
  wire [C_NUM_MASTER_SLOTS*4-1:0]                      cb_mi_arregion        ;
  wire [C_NUM_MASTER_SLOTS*4-1:0]                      cb_mi_arqos           ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_ARUSER_WIDTH-1:0]     cb_mi_aruser          ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_arvalid         ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_arready         ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_ID_WIDTH-1:0]         cb_mi_rid             ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_DATA_WIDTH-1:0]       cb_mi_rdata           ;
  wire [C_NUM_MASTER_SLOTS*2-1:0]                      cb_mi_rresp           ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_rlast           ;
  wire [C_NUM_MASTER_SLOTS*C_AXI_RUSER_WIDTH-1:0]      cb_mi_ruser           ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_rvalid          ;
  wire [C_NUM_MASTER_SLOTS-1:0]                        cb_mi_rready          ;
  
  genvar slot;

generate
    for (slot=0;slot<C_NUM_SLAVE_SLOTS;slot=slot+1) begin : gen_si_tieoff
      assign si_cb_awid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                             = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? (s_axi_awid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] & f_thread_id_mask(slot))              : 0 ;
      assign si_cb_awaddr[slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]                       = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? s_axi_awaddr[slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]                       : 0 ;
      assign si_cb_awlen[slot*8+:8]                                                      = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_awlen[slot*P_LEN+:P_LEN] : 0 ;
      assign si_cb_awsize[slot*3+:3]                                                     = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_awsize[slot*3+:3]                                                     : P_AXILITE_SIZE ;
      assign si_cb_awburst[slot*2+:2]                                                    = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_awburst[slot*2+:2]                                                    : P_INCR ;
      assign si_cb_awlock[slot*2+:2]                                                     = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? {1'b0, s_axi_awlock[slot*P_LOCK+:1]}                                             : 0 ;
      assign si_cb_awcache[slot*4+:4]                                                    = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_awcache[slot*4+:4]                                                    : 0 ;
      assign si_cb_awprot[slot*3+:3]                                                     = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? s_axi_awprot[slot*3+:3]                                                     : 0 ;
      assign si_cb_awqos[slot*4+:4]                                                      = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_awqos[slot*4+:4]                                                      : 0 ;
//      assign si_cb_awregion[slot*4+:4]                                                      = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL==P_AXI4)                                ) ? s_axi_awregion[slot*4+:4]                                                      : 0 ;
      assign si_cb_awuser[slot*C_AXI_AWUSER_WIDTH+:C_AXI_AWUSER_WIDTH]                   = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? s_axi_awuser[slot*C_AXI_AWUSER_WIDTH+:C_AXI_AWUSER_WIDTH]                   : 0 ;
      assign si_cb_awvalid[slot*1+:1]                                                    = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? s_axi_awvalid[slot*1+:1]                                                    : 0 ;
      assign si_cb_wid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL==P_AXI3)                                   ) ? (s_axi_wid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] & f_thread_id_mask(slot))   : 0 ;
      assign si_cb_wdata[slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]                        = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? s_axi_wdata[slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]     : 0 ;
      assign si_cb_wstrb[slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8]                    = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? s_axi_wstrb[slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8] : 0 ;
      assign si_cb_wlast[slot*1+:1]                                                      = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_wlast[slot*1+:1]                                                      : 1'b1 ;
      assign si_cb_wuser[slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH]                      = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? s_axi_wuser[slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH]                      : 0 ;
      assign si_cb_wvalid[slot*1+:1]                                                     = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? s_axi_wvalid[slot*1+:1]                                                     : 0 ;
      assign si_cb_bready[slot*1+:1]                                                     = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? s_axi_bready[slot*1+:1]                                                     : 0 ;
      assign si_cb_arid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                             = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? (s_axi_arid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] & f_thread_id_mask(slot))              : 0 ;
      assign si_cb_araddr[slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]                       = (P_S_AXI_SUPPORTS_READ[slot]                                                                             ) ? s_axi_araddr[slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]                       : 0 ;
      assign si_cb_arlen[slot*8+:8]                                                      = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_arlen[slot*P_LEN+:P_LEN] : 0 ;
      assign si_cb_arsize[slot*3+:3]                                                     = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_arsize[slot*3+:3]                                                     : P_AXILITE_SIZE ;
      assign si_cb_arburst[slot*2+:2]                                                    = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_arburst[slot*2+:2]                                                    : P_INCR ;
      assign si_cb_arlock[slot*2+:2]                                                     = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? {1'b0, s_axi_arlock[slot*P_LOCK+:1]}                                             : 0 ;
      assign si_cb_arcache[slot*4+:4]                                                    = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                  ) ? s_axi_arcache[slot*4+:4]                                                    : 0 ;
      assign si_cb_arprot[slot*3+:3]                                                     = (P_S_AXI_SUPPORTS_READ[slot]                                                                             ) ? s_axi_arprot[slot*3+:3]                                                     : 0 ;
      assign si_cb_arqos[slot*4+:4]                                                      = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? s_axi_arqos[slot*4+:4]                                                      : 0 ;
//      assign si_cb_arregion[slot*4+:4]                                                      = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL==P_AXI4)                                ) ? s_axi_arregion[slot*4+:4]                                                      : 0 ;
      assign si_cb_aruser[slot*C_AXI_ARUSER_WIDTH+:C_AXI_ARUSER_WIDTH]                   = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? s_axi_aruser[slot*C_AXI_ARUSER_WIDTH+:C_AXI_ARUSER_WIDTH]                   : 0 ;
      assign si_cb_arvalid[slot*1+:1]                                                    = (P_S_AXI_SUPPORTS_READ[slot]                                                                             ) ? s_axi_arvalid[slot*1+:1]                                                    : 0 ;
      assign si_cb_rready[slot*1+:1]                                                     = (P_S_AXI_SUPPORTS_READ[slot]                                                                             ) ? s_axi_rready[slot*1+:1]                                                     : 0 ;                                       

      assign s_axi_awready[slot*1+:1]                                                    = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? si_cb_awready[slot*1+:1]                                                    : 0 ;
      assign s_axi_wready[slot*1+:1]                                                     = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? si_cb_wready[slot*1+:1]                                                     : 0 ;
      assign s_axi_bid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? (si_cb_bid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] & f_thread_id_mask(slot))               : 0 ;
      assign s_axi_bresp[slot*2+:2]                                                      = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? si_cb_bresp[slot*2+:2]                                                      : 0 ;
      assign s_axi_buser[slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH]                      = (P_S_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? si_cb_buser[slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH]                      : 0 ;
      assign s_axi_bvalid[slot*1+:1]                                                     = (P_S_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? si_cb_bvalid[slot*1+:1]                                                     : 0 ;
      assign s_axi_arready[slot*1+:1]                                                    = (P_S_AXI_SUPPORTS_READ[slot]                                                                             ) ? si_cb_arready[slot*1+:1]                                                    : 0 ;
      assign s_axi_rid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? (si_cb_rid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH] & f_thread_id_mask(slot))               : 0 ;
      assign s_axi_rdata[slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]                        = (P_S_AXI_SUPPORTS_READ[slot]                                                                             ) ? si_cb_rdata[slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]     : 0 ;
      assign s_axi_rresp[slot*2+:2]                                                      = (P_S_AXI_SUPPORTS_READ[slot]                                                                             ) ? si_cb_rresp[slot*2+:2]                                                      : 0 ;
      assign s_axi_rlast[slot*1+:1]                                                      = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? si_cb_rlast[slot*1+:1]                                                      : 0 ;
      assign s_axi_ruser[slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]                      = (P_S_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? si_cb_ruser[slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]                      : 0 ;
      assign s_axi_rvalid[slot*1+:1]                                                     = (P_S_AXI_SUPPORTS_READ[slot]                                                                             ) ? si_cb_rvalid[slot*1+:1]                                                     : 0 ;
    end  // gen_si_tieoff

    for (slot=0;slot<C_NUM_MASTER_SLOTS;slot=slot+1) begin : gen_mi_tieoff
      assign m_axi_awid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                             = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_awid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                             : 0 ;
      assign m_axi_awaddr[slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]                       = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? cb_mi_awaddr[slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]                       : 0 ;
      assign m_axi_awlen[slot*P_LEN+:P_LEN]                                              = (~P_M_AXI_SUPPORTS_WRITE[slot]) ? 0 : (C_AXI_PROTOCOL==P_AXI4                             ) ? cb_mi_awlen[slot*8+:8] : (C_AXI_PROTOCOL==P_AXI3) ? cb_mi_awlen[slot*8+:4] : 0 ;
      assign m_axi_awsize[slot*3+:3]                                                     = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_awsize[slot*3+:3]                                                     : 0 ;
      assign m_axi_awburst[slot*2+:2]                                                    = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_awburst[slot*2+:2]                                                    : 0 ;
      assign m_axi_awlock[slot*P_LOCK+:P_LOCK]                                           = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_awlock[slot*2+:1]                                                     : 0 ;
      assign m_axi_awcache[slot*4+:4]                                                    = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_awcache[slot*4+:4]                                                    : 0 ;
      assign m_axi_awprot[slot*3+:3]                                                     = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? cb_mi_awprot[slot*3+:3]                                                     : 0 ;
      assign m_axi_awregion[slot*4+:4]                                                   = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL==P_AXI4)                                 ) ? cb_mi_awregion[slot*4+:4]                                                   : 0 ;
      assign m_axi_awqos[slot*4+:4]                                                      = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_awqos[slot*4+:4]                                                      : 0 ;
      assign m_axi_awuser[slot*C_AXI_AWUSER_WIDTH+:C_AXI_AWUSER_WIDTH]                   = (P_M_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? cb_mi_awuser[slot*C_AXI_AWUSER_WIDTH+:C_AXI_AWUSER_WIDTH]                   : 0 ;
      assign m_axi_awvalid[slot*1+:1]                                                    = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? cb_mi_awvalid[slot*1+:1]                                                    : 0 ;
      assign m_axi_wid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_wid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              : 0 ;
      assign m_axi_wdata[slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]                        = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? cb_mi_wdata[slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]     : 0 ;
      assign m_axi_wstrb[slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8]                    = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? cb_mi_wstrb[slot*C_AXI_DATA_WIDTH/8+:C_AXI_DATA_WIDTH/8] : 0 ;
      assign m_axi_wlast[slot*1+:1]                                                      = (P_M_AXI_SUPPORTS_WRITE[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_wlast[slot*1+:1]                                                      : 0 ;
      assign m_axi_wuser[slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH]                      = (P_M_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? cb_mi_wuser[slot*C_AXI_WUSER_WIDTH+:C_AXI_WUSER_WIDTH]                      : 0 ;
      assign m_axi_wvalid[slot*1+:1]                                                     = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? cb_mi_wvalid[slot*1+:1]                                                     : 0 ;
      assign m_axi_bready[slot*1+:1]                                                     = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? cb_mi_bready[slot*1+:1]                                                     : 0 ;
      assign m_axi_arid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                             = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_arid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                            : 0 ;
      assign m_axi_araddr[slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]                       = (P_M_AXI_SUPPORTS_READ[slot]                                                                             ) ? cb_mi_araddr[slot*C_AXI_ADDR_WIDTH+:C_AXI_ADDR_WIDTH]                       : 0 ;
      assign m_axi_arlen[slot*P_LEN+:P_LEN]                                              = (~P_M_AXI_SUPPORTS_READ[slot]) ? 0 : (C_AXI_PROTOCOL==P_AXI4                             ) ? cb_mi_arlen[slot*8+:8] : (C_AXI_PROTOCOL==P_AXI3) ? cb_mi_arlen[slot*8+:4] : 0 ;
      assign m_axi_arsize[slot*3+:3]                                                     = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_arsize[slot*3+:3]                                                     : 0 ;
      assign m_axi_arburst[slot*2+:2]                                                    = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_arburst[slot*2+:2]                                                    : 0 ;
      assign m_axi_arlock[slot*P_LOCK+:P_LOCK]                                           = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_arlock[slot*2+:1]                                                     : 0 ;
      assign m_axi_arcache[slot*4+:4]                                                    = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_arcache[slot*4+:4]                                                    : 0 ;
      assign m_axi_arprot[slot*3+:3]                                                     = (P_M_AXI_SUPPORTS_READ[slot]                                                                             ) ? cb_mi_arprot[slot*3+:3]                                                     : 0 ;
      assign m_axi_arregion[slot*4+:4]                                                   = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL==P_AXI4)                                 ) ? cb_mi_arregion[slot*4+:4]                                                   : 0 ;
      assign m_axi_arqos[slot*4+:4]                                                      = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                 ) ? cb_mi_arqos[slot*4+:4]                                                      : 0 ;
      assign m_axi_aruser[slot*C_AXI_ARUSER_WIDTH+:C_AXI_ARUSER_WIDTH]                   = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? cb_mi_aruser[slot*C_AXI_ARUSER_WIDTH+:C_AXI_ARUSER_WIDTH]                   : 0 ;
      assign m_axi_arvalid[slot*1+:1]                                                    = (P_M_AXI_SUPPORTS_READ[slot]                                                                             ) ? cb_mi_arvalid[slot*1+:1]                                                    : 0 ;
      assign m_axi_rready[slot*1+:1]                                                     = (P_M_AXI_SUPPORTS_READ[slot]                                                                             ) ? cb_mi_rready[slot*1+:1]                                                     : 0 ;

      assign cb_mi_awready[slot*1+:1]                                                    = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? m_axi_awready[slot*1+:1]                                                    : 0 ;
      assign cb_mi_wready[slot*1+:1]                                                     = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? m_axi_wready[slot*1+:1]                                                     : 0 ;
      assign cb_mi_bid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              = (P_M_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? m_axi_bid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              : 0 ;
      assign cb_mi_bresp[slot*2+:2]                                                      = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? m_axi_bresp[slot*2+:2]                                                      : 0 ;
      assign cb_mi_buser[slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH]                      = (P_M_AXI_SUPPORTS_WRITE[slot] && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? m_axi_buser[slot*C_AXI_BUSER_WIDTH+:C_AXI_BUSER_WIDTH]                      : 0 ;
      assign cb_mi_bvalid[slot*1+:1]                                                     = (P_M_AXI_SUPPORTS_WRITE[slot]                                                                            ) ? m_axi_bvalid[slot*1+:1]                                                     : 0 ;
      assign cb_mi_arready[slot*1+:1]                                                    = (P_M_AXI_SUPPORTS_READ[slot]                                                                             ) ? m_axi_arready[slot*1+:1]                                                    : 0 ;
      assign cb_mi_rid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? m_axi_rid[slot*C_AXI_ID_WIDTH+:C_AXI_ID_WIDTH]                              : 0 ;
      assign cb_mi_rdata[slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]                        = (P_M_AXI_SUPPORTS_READ[slot]                                                                             ) ? m_axi_rdata[slot*C_AXI_DATA_WIDTH+:C_AXI_DATA_WIDTH]     : 0 ;
      assign cb_mi_rresp[slot*2+:2]                                                      = (P_M_AXI_SUPPORTS_READ[slot]                                                                             ) ? m_axi_rresp[slot*2+:2]                                                      : 0 ;
      assign cb_mi_rlast[slot*1+:1]                                                      = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE)                                ) ? m_axi_rlast[slot*1+:1]                                                      : 1'b1 ;
      assign cb_mi_ruser[slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]                      = (P_M_AXI_SUPPORTS_READ[slot]  && (C_AXI_PROTOCOL!=P_AXILITE) && (C_AXI_SUPPORTS_USER_SIGNALS!=0) ) ? m_axi_ruser[slot*C_AXI_RUSER_WIDTH+:C_AXI_RUSER_WIDTH]                      : 0 ;
      assign cb_mi_rvalid[slot*1+:1]                                                     = (P_M_AXI_SUPPORTS_READ[slot]                                                                             ) ? m_axi_rvalid[slot*1+:1]                                                     : 0 ;
    end  // gen_mi_tieoff

    if ((C_CONNECTIVITY_MODE==0) || (C_AXI_PROTOCOL==P_AXILITE)) begin : gen_sasd
      axi_crossbar_v2_1_20_crossbar_sasd #
      (
        .C_FAMILY                         (P_FAMILY),
        .C_NUM_SLAVE_SLOTS                (C_NUM_SLAVE_SLOTS),
        .C_NUM_MASTER_SLOTS               (C_NUM_MASTER_SLOTS),
        .C_NUM_ADDR_RANGES                (C_NUM_ADDR_RANGES),
        .C_AXI_ID_WIDTH                   (C_AXI_ID_WIDTH),
        .C_AXI_ADDR_WIDTH                 (C_AXI_ADDR_WIDTH),
        .C_AXI_DATA_WIDTH                 (C_AXI_DATA_WIDTH),
        .C_AXI_PROTOCOL                   (C_AXI_PROTOCOL),
        .C_M_AXI_BASE_ADDR                (C_M_AXI_BASE_ADDR),
        .C_M_AXI_HIGH_ADDR                (f_high_addr(0)),
        .C_S_AXI_BASE_ID                  (P_S_AXI_BASE_ID),
        .C_S_AXI_HIGH_ID                  (P_S_AXI_HIGH_ID),
        .C_AXI_SUPPORTS_USER_SIGNALS      (C_AXI_SUPPORTS_USER_SIGNALS),
        .C_AXI_AWUSER_WIDTH               (C_AXI_AWUSER_WIDTH),
        .C_AXI_ARUSER_WIDTH               (C_AXI_ARUSER_WIDTH),
        .C_AXI_WUSER_WIDTH                (C_AXI_WUSER_WIDTH),
        .C_AXI_RUSER_WIDTH                (C_AXI_RUSER_WIDTH),
        .C_AXI_BUSER_WIDTH                (C_AXI_BUSER_WIDTH),
        .C_S_AXI_SUPPORTS_WRITE           (P_S_AXI_SUPPORTS_WRITE),
        .C_S_AXI_SUPPORTS_READ            (P_S_AXI_SUPPORTS_READ),
        .C_M_AXI_SUPPORTS_WRITE           (P_M_AXI_SUPPORTS_WRITE),
        .C_M_AXI_SUPPORTS_READ            (P_M_AXI_SUPPORTS_READ),
        .C_S_AXI_ARB_PRIORITY             (C_S_AXI_ARB_PRIORITY),
        .C_M_AXI_SECURE                   (C_M_AXI_SECURE),
        .C_R_REGISTER                     (C_R_REGISTER),
        .C_RANGE_CHECK                    (P_RANGE_CHECK),
        .C_ADDR_DECODE                    (P_ADDR_DECODE),
        .C_M_AXI_ERR_MODE                 (P_M_AXI_ERR_MODE),
        .C_DEBUG                          (C_DEBUG)
      )
        crossbar_sasd_0
      (
          .ACLK                             (aclk),
          .ARESETN                          (aresetn),
          .S_AXI_AWID                       (si_cb_awid           ),
          .S_AXI_AWADDR                     (si_cb_awaddr         ),
          .S_AXI_AWLEN                      (si_cb_awlen          ),
          .S_AXI_AWSIZE                     (si_cb_awsize         ),
          .S_AXI_AWBURST                    (si_cb_awburst        ),
          .S_AXI_AWLOCK                     (si_cb_awlock         ),
          .S_AXI_AWCACHE                    (si_cb_awcache        ),
          .S_AXI_AWPROT                     (si_cb_awprot         ),
//          .S_AXI_AWREGION                   (si_cb_awregion       ),
          .S_AXI_AWQOS                      (si_cb_awqos          ),
          .S_AXI_AWUSER                     (si_cb_awuser         ),
          .S_AXI_AWVALID                    (si_cb_awvalid        ),
          .S_AXI_AWREADY                    (si_cb_awready        ),
          .S_AXI_WID                        (si_cb_wid             ),
          .S_AXI_WDATA                      (si_cb_wdata          ),
          .S_AXI_WSTRB                      (si_cb_wstrb          ),
          .S_AXI_WLAST                      (si_cb_wlast          ),
          .S_AXI_WUSER                      (si_cb_wuser          ),
          .S_AXI_WVALID                     (si_cb_wvalid         ),
          .S_AXI_WREADY                     (si_cb_wready         ),
          .S_AXI_BID                        (si_cb_bid            ),
          .S_AXI_BRESP                      (si_cb_bresp          ),
          .S_AXI_BUSER                      (si_cb_buser          ),
          .S_AXI_BVALID                     (si_cb_bvalid         ),
          .S_AXI_BREADY                     (si_cb_bready         ),
          .S_AXI_ARID                       (si_cb_arid           ),
          .S_AXI_ARADDR                     (si_cb_araddr         ),
          .S_AXI_ARLEN                      (si_cb_arlen          ),
          .S_AXI_ARSIZE                     (si_cb_arsize         ),
          .S_AXI_ARBURST                    (si_cb_arburst        ),
          .S_AXI_ARLOCK                     (si_cb_arlock         ),
          .S_AXI_ARCACHE                    (si_cb_arcache        ),
          .S_AXI_ARPROT                     (si_cb_arprot         ),
//          .S_AXI_ARREGION                   (si_cb_arregion       ),
          .S_AXI_ARQOS                      (si_cb_arqos          ),
          .S_AXI_ARUSER                     (si_cb_aruser         ),
          .S_AXI_ARVALID                    (si_cb_arvalid        ),
          .S_AXI_ARREADY                    (si_cb_arready        ),
          .S_AXI_RID                        (si_cb_rid            ),
          .S_AXI_RDATA                      (si_cb_rdata          ),
          .S_AXI_RRESP                      (si_cb_rresp          ),
          .S_AXI_RLAST                      (si_cb_rlast          ),
          .S_AXI_RUSER                      (si_cb_ruser          ),
          .S_AXI_RVALID                     (si_cb_rvalid         ),
          .S_AXI_RREADY                     (si_cb_rready         ),
          .M_AXI_AWID                       (cb_mi_awid           ),
          .M_AXI_AWADDR                     (cb_mi_awaddr         ),
          .M_AXI_AWLEN                      (cb_mi_awlen          ),
          .M_AXI_AWSIZE                     (cb_mi_awsize         ),
          .M_AXI_AWBURST                    (cb_mi_awburst        ),
          .M_AXI_AWLOCK                     (cb_mi_awlock         ),
          .M_AXI_AWCACHE                    (cb_mi_awcache        ),
          .M_AXI_AWPROT                     (cb_mi_awprot         ),
          .M_AXI_AWREGION                   (cb_mi_awregion       ),
          .M_AXI_AWQOS                      (cb_mi_awqos          ),
          .M_AXI_AWUSER                     (cb_mi_awuser         ),
          .M_AXI_AWVALID                    (cb_mi_awvalid        ),
          .M_AXI_AWREADY                    (cb_mi_awready        ),
          .M_AXI_WID                        (cb_mi_wid             ),
          .M_AXI_WDATA                      (cb_mi_wdata          ),
          .M_AXI_WSTRB                      (cb_mi_wstrb          ),
          .M_AXI_WLAST                      (cb_mi_wlast          ),
          .M_AXI_WUSER                      (cb_mi_wuser          ),
          .M_AXI_WVALID                     (cb_mi_wvalid         ),
          .M_AXI_WREADY                     (cb_mi_wready         ),
          .M_AXI_BID                        (cb_mi_bid            ),
          .M_AXI_BRESP                      (cb_mi_bresp          ),
          .M_AXI_BUSER                      (cb_mi_buser          ),
          .M_AXI_BVALID                     (cb_mi_bvalid         ),
          .M_AXI_BREADY                     (cb_mi_bready         ),
          .M_AXI_ARID                       (cb_mi_arid           ),
          .M_AXI_ARADDR                     (cb_mi_araddr         ),
          .M_AXI_ARLEN                      (cb_mi_arlen          ),
          .M_AXI_ARSIZE                     (cb_mi_arsize         ),
          .M_AXI_ARBURST                    (cb_mi_arburst        ),
          .M_AXI_ARLOCK                     (cb_mi_arlock         ),
          .M_AXI_ARCACHE                    (cb_mi_arcache        ),
          .M_AXI_ARPROT                     (cb_mi_arprot         ),
          .M_AXI_ARREGION                   (cb_mi_arregion       ),
          .M_AXI_ARQOS                      (cb_mi_arqos          ),
          .M_AXI_ARUSER                     (cb_mi_aruser         ),
          .M_AXI_ARVALID                    (cb_mi_arvalid        ),
          .M_AXI_ARREADY                    (cb_mi_arready        ),
          .M_AXI_RID                        (cb_mi_rid            ),
          .M_AXI_RDATA                      (cb_mi_rdata          ),
          .M_AXI_RRESP                      (cb_mi_rresp          ),
          .M_AXI_RLAST                      (cb_mi_rlast          ),
          .M_AXI_RUSER                      (cb_mi_ruser          ),
          .M_AXI_RVALID                     (cb_mi_rvalid         ),
          .M_AXI_RREADY                     (cb_mi_rready         )
      );
    end else begin : gen_samd
      axi_crossbar_v2_1_20_crossbar #
      (
        .C_FAMILY                         (P_FAMILY),
        .C_NUM_SLAVE_SLOTS                (C_NUM_SLAVE_SLOTS),
        .C_NUM_MASTER_SLOTS               (C_NUM_MASTER_SLOTS),
        .C_NUM_ADDR_RANGES                (C_NUM_ADDR_RANGES),
        .C_AXI_ID_WIDTH                   (C_AXI_ID_WIDTH),
        .C_S_AXI_THREAD_ID_WIDTH          (C_S_AXI_THREAD_ID_WIDTH),
        .C_AXI_ADDR_WIDTH                 (C_AXI_ADDR_WIDTH),
        .C_AXI_DATA_WIDTH                 (C_AXI_DATA_WIDTH),
        .C_AXI_PROTOCOL                   (C_AXI_PROTOCOL),
        .C_M_AXI_BASE_ADDR                (C_M_AXI_BASE_ADDR),
        .C_M_AXI_HIGH_ADDR                (f_high_addr(0)),
        .C_S_AXI_BASE_ID                  (P_S_AXI_BASE_ID),
        .C_S_AXI_HIGH_ID                  (P_S_AXI_HIGH_ID),
        .C_AXI_SUPPORTS_USER_SIGNALS      (C_AXI_SUPPORTS_USER_SIGNALS),
        .C_AXI_AWUSER_WIDTH               (C_AXI_AWUSER_WIDTH),
        .C_AXI_ARUSER_WIDTH               (C_AXI_ARUSER_WIDTH),
        .C_AXI_WUSER_WIDTH                (C_AXI_WUSER_WIDTH),
        .C_AXI_RUSER_WIDTH                (C_AXI_RUSER_WIDTH),
        .C_AXI_BUSER_WIDTH                (C_AXI_BUSER_WIDTH),
        .C_S_AXI_SUPPORTS_WRITE           (P_S_AXI_SUPPORTS_WRITE),
        .C_S_AXI_SUPPORTS_READ            (P_S_AXI_SUPPORTS_READ),
        .C_M_AXI_SUPPORTS_WRITE           (P_M_AXI_SUPPORTS_WRITE),
        .C_M_AXI_SUPPORTS_READ            (P_M_AXI_SUPPORTS_READ),
        .C_M_AXI_WRITE_CONNECTIVITY       (C_M_AXI_WRITE_CONNECTIVITY),
        .C_M_AXI_READ_CONNECTIVITY        (C_M_AXI_READ_CONNECTIVITY),
        .C_S_AXI_SINGLE_THREAD            (C_S_AXI_SINGLE_THREAD),
        .C_S_AXI_WRITE_ACCEPTANCE         (C_S_AXI_WRITE_ACCEPTANCE),
        .C_S_AXI_READ_ACCEPTANCE          (C_S_AXI_READ_ACCEPTANCE),
        .C_M_AXI_WRITE_ISSUING            (C_M_AXI_WRITE_ISSUING),
        .C_M_AXI_READ_ISSUING             (C_M_AXI_READ_ISSUING),
        .C_S_AXI_ARB_PRIORITY             (C_S_AXI_ARB_PRIORITY),
        .C_M_AXI_SECURE                   (C_M_AXI_SECURE),
        .C_RANGE_CHECK                    (P_RANGE_CHECK),
        .C_ADDR_DECODE                    (P_ADDR_DECODE),
        .C_W_ISSUE_WIDTH                  (f_write_issue_width_vec(0) ),
        .C_R_ISSUE_WIDTH                  (f_read_issue_width_vec(0) ),
        .C_W_ACCEPT_WIDTH                 (f_write_accept_width_vec(0)),
        .C_R_ACCEPT_WIDTH                 (f_read_accept_width_vec(0)),
        .C_M_AXI_ERR_MODE                 (P_M_AXI_ERR_MODE),
        .C_DEBUG                          (C_DEBUG)
      )
        crossbar_samd 
      (
          .ACLK                             (aclk),
          .ARESETN                          (aresetn),
          .S_AXI_AWID                       (si_cb_awid             ),
          .S_AXI_AWADDR                     (si_cb_awaddr           ),
          .S_AXI_AWLEN                      (si_cb_awlen            ),
          .S_AXI_AWSIZE                     (si_cb_awsize           ),
          .S_AXI_AWBURST                    (si_cb_awburst          ),
          .S_AXI_AWLOCK                     (si_cb_awlock           ),
          .S_AXI_AWCACHE                    (si_cb_awcache          ),
          .S_AXI_AWPROT                     (si_cb_awprot           ),
//          .S_AXI_AWREGION                   (si_cb_awregion       ),
          .S_AXI_AWQOS                      (si_cb_awqos            ),
          .S_AXI_AWUSER                     (si_cb_awuser           ),
          .S_AXI_AWVALID                    (si_cb_awvalid          ),
          .S_AXI_AWREADY                    (si_cb_awready          ),
          .S_AXI_WID                        (si_cb_wid             ),
          .S_AXI_WDATA                      (si_cb_wdata            ),
          .S_AXI_WSTRB                      (si_cb_wstrb            ),
          .S_AXI_WLAST                      (si_cb_wlast            ),
          .S_AXI_WUSER                      (si_cb_wuser            ),
          .S_AXI_WVALID                     (si_cb_wvalid           ),
          .S_AXI_WREADY                     (si_cb_wready           ),
          .S_AXI_BID                        (si_cb_bid              ),
          .S_AXI_BRESP                      (si_cb_bresp            ),
          .S_AXI_BUSER                      (si_cb_buser            ),
          .S_AXI_BVALID                     (si_cb_bvalid           ),
          .S_AXI_BREADY                     (si_cb_bready           ),
          .S_AXI_ARID                       (si_cb_arid             ),
          .S_AXI_ARADDR                     (si_cb_araddr           ),
          .S_AXI_ARLEN                      (si_cb_arlen            ),
          .S_AXI_ARSIZE                     (si_cb_arsize           ),
          .S_AXI_ARBURST                    (si_cb_arburst          ),
          .S_AXI_ARLOCK                     (si_cb_arlock           ),
          .S_AXI_ARCACHE                    (si_cb_arcache          ),
          .S_AXI_ARPROT                     (si_cb_arprot           ),
//          .S_AXI_ARREGION                   (si_cb_arregion       ),
          .S_AXI_ARQOS                      (si_cb_arqos            ),
          .S_AXI_ARUSER                     (si_cb_aruser           ),
          .S_AXI_ARVALID                    (si_cb_arvalid          ),
          .S_AXI_ARREADY                    (si_cb_arready          ),
          .S_AXI_RID                        (si_cb_rid              ),
          .S_AXI_RDATA                      (si_cb_rdata            ),
          .S_AXI_RRESP                      (si_cb_rresp            ),
          .S_AXI_RLAST                      (si_cb_rlast            ),
          .S_AXI_RUSER                      (si_cb_ruser            ),
          .S_AXI_RVALID                     (si_cb_rvalid           ),
          .S_AXI_RREADY                     (si_cb_rready           ),
          .M_AXI_AWID                       (cb_mi_awid             ),
          .M_AXI_AWADDR                     (cb_mi_awaddr           ),
          .M_AXI_AWLEN                      (cb_mi_awlen            ),
          .M_AXI_AWSIZE                     (cb_mi_awsize           ),
          .M_AXI_AWBURST                    (cb_mi_awburst          ),
          .M_AXI_AWLOCK                     (cb_mi_awlock           ),
          .M_AXI_AWCACHE                    (cb_mi_awcache          ),
          .M_AXI_AWPROT                     (cb_mi_awprot           ),
          .M_AXI_AWREGION                   (cb_mi_awregion         ),
          .M_AXI_AWQOS                      (cb_mi_awqos            ),
          .M_AXI_AWUSER                     (cb_mi_awuser           ),
          .M_AXI_AWVALID                    (cb_mi_awvalid          ),
          .M_AXI_AWREADY                    (cb_mi_awready          ),
          .M_AXI_WID                        (cb_mi_wid             ),
          .M_AXI_WDATA                      (cb_mi_wdata            ),
          .M_AXI_WSTRB                      (cb_mi_wstrb            ),
          .M_AXI_WLAST                      (cb_mi_wlast            ),
          .M_AXI_WUSER                      (cb_mi_wuser            ),
          .M_AXI_WVALID                     (cb_mi_wvalid           ),
          .M_AXI_WREADY                     (cb_mi_wready           ),
          .M_AXI_BID                        (cb_mi_bid              ),
          .M_AXI_BRESP                      (cb_mi_bresp            ),
          .M_AXI_BUSER                      (cb_mi_buser            ),
          .M_AXI_BVALID                     (cb_mi_bvalid           ),
          .M_AXI_BREADY                     (cb_mi_bready           ),
          .M_AXI_ARID                       (cb_mi_arid             ),
          .M_AXI_ARADDR                     (cb_mi_araddr           ),
          .M_AXI_ARLEN                      (cb_mi_arlen            ),
          .M_AXI_ARSIZE                     (cb_mi_arsize           ),
          .M_AXI_ARBURST                    (cb_mi_arburst          ),
          .M_AXI_ARLOCK                     (cb_mi_arlock           ),
          .M_AXI_ARCACHE                    (cb_mi_arcache          ),
          .M_AXI_ARPROT                     (cb_mi_arprot           ),
          .M_AXI_ARREGION                   (cb_mi_arregion         ),
          .M_AXI_ARQOS                      (cb_mi_arqos            ),
          .M_AXI_ARUSER                     (cb_mi_aruser           ),
          .M_AXI_ARVALID                    (cb_mi_arvalid          ),
          .M_AXI_ARREADY                    (cb_mi_arready          ),
          .M_AXI_RID                        (cb_mi_rid              ),
          .M_AXI_RDATA                      (cb_mi_rdata            ),
          .M_AXI_RRESP                      (cb_mi_rresp            ),
          .M_AXI_RLAST                      (cb_mi_rlast            ),
          .M_AXI_RUSER                      (cb_mi_ruser            ),
          .M_AXI_RVALID                     (cb_mi_rvalid           ),
          .M_AXI_RREADY                     (cb_mi_rready           )
      );
    end  // gen_samd
//  end  // gen_crossbar
endgenerate

endmodule

`default_nettype wire


