Subversion Repositories wdsp

/////////////////////////////////////////////////////////////////////

////                                                             ////

////  WISHBONE Connection Matrix Master Interface                ////

////                                                             ////

////                                                             ////

////  Author: Rudolf Usselmann                                   ////

////          rudi@asics.ws                                      ////

////                                                             ////

////                                                             ////

////  Downloaded from: http://www.opencores.org/cores/wb_conmax/ ////

////                                                             ////

/////////////////////////////////////////////////////////////////////

////                                                             ////

//// Copyright (C) 2001 Rudolf Usselmann                         ////

////                    rudi@asics.ws                            ////

////                                                             ////

//// This source file may be used and distributed without        ////

//// restriction provided that this copyright statement is not   ////

//// removed from the file and that any derivative work contains ////

//// the original copyright notice and the associated disclaimer.////

////                                                             ////

////     THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY     ////

//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED   ////

//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS   ////

//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR      ////

//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,         ////

//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    ////

//// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE   ////

//// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR        ////

//// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF  ////

//// LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT  ////

//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT  ////

//// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE         ////

//// POSSIBILITY OF SUCH DAMAGE.                                 ////

////                                                             ////

/////////////////////////////////////////////////////////////////////

//  CVS Log

//

//  $Id: wb_conmax_master_if.v,v 1.1.1.1 2001-10-19 11:01:41 rudi Exp $

//

//  $Date: 2001-10-19 11:01:41 $

//  $Revision: 1.1.1.1 $

//  $Author: rudi $

//  $Locker:  $

//  $State: Exp $

//

// Change History:

//               $Log: not supported by cvs2svn $

//

//

//

//

`include "wb_conmax_defines.v"

module wb_conmax_master_if(

        clk_i, rst_i,

        // Master interface

        wb_data_i, wb_data_o, wb_addr_i, wb_sel_i, wb_we_i, wb_cyc_i,

        wb_stb_i, wb_ack_o, wb_err_o, wb_rty_o,

        // Slave 0 Interface

        s0_data_i, s0_data_o, s0_addr_o, s0_sel_o, s0_we_o, s0_cyc_o,

        s0_stb_o, s0_ack_i, s0_err_i, s0_rty_i,

        // Slave 1 Interface

        s1_data_i, s1_data_o, s1_addr_o, s1_sel_o, s1_we_o, s1_cyc_o,

        s1_stb_o, s1_ack_i, s1_err_i, s1_rty_i,

        // Slave 2 Interface

        s2_data_i, s2_data_o, s2_addr_o, s2_sel_o, s2_we_o, s2_cyc_o,

        s2_stb_o, s2_ack_i, s2_err_i, s2_rty_i,

        // Slave 3 Interface

        s3_data_i, s3_data_o, s3_addr_o, s3_sel_o, s3_we_o, s3_cyc_o,

        s3_stb_o, s3_ack_i, s3_err_i, s3_rty_i,

        // Slave 4 Interface

        s4_data_i, s4_data_o, s4_addr_o, s4_sel_o, s4_we_o, s4_cyc_o,

        s4_stb_o, s4_ack_i, s4_err_i, s4_rty_i,

        // Slave 5 Interface

        s5_data_i, s5_data_o, s5_addr_o, s5_sel_o, s5_we_o, s5_cyc_o,

        s5_stb_o, s5_ack_i, s5_err_i, s5_rty_i,

        // Slave 6 Interface

        s6_data_i, s6_data_o, s6_addr_o, s6_sel_o, s6_we_o, s6_cyc_o,

        s6_stb_o, s6_ack_i, s6_err_i, s6_rty_i,

        // Slave 7 Interface

        s7_data_i, s7_data_o, s7_addr_o, s7_sel_o, s7_we_o, s7_cyc_o,

        s7_stb_o, s7_ack_i, s7_err_i, s7_rty_i,

        // Slave 8 Interface

        s8_data_i, s8_data_o, s8_addr_o, s8_sel_o, s8_we_o, s8_cyc_o,

        s8_stb_o, s8_ack_i, s8_err_i, s8_rty_i,

        // Slave 9 Interface

        s9_data_i, s9_data_o, s9_addr_o, s9_sel_o, s9_we_o, s9_cyc_o,

        s9_stb_o, s9_ack_i, s9_err_i, s9_rty_i,

        // Slave 10 Interface

        s10_data_i, s10_data_o, s10_addr_o, s10_sel_o, s10_we_o, s10_cyc_o,

        s10_stb_o, s10_ack_i, s10_err_i, s10_rty_i,

        // Slave 11 Interface

        s11_data_i, s11_data_o, s11_addr_o, s11_sel_o, s11_we_o, s11_cyc_o,

        s11_stb_o, s11_ack_i, s11_err_i, s11_rty_i,

        // Slave 12 Interface

        s12_data_i, s12_data_o, s12_addr_o, s12_sel_o, s12_we_o, s12_cyc_o,

        s12_stb_o, s12_ack_i, s12_err_i, s12_rty_i,

        // Slave 13 Interface

        s13_data_i, s13_data_o, s13_addr_o, s13_sel_o, s13_we_o, s13_cyc_o,

        s13_stb_o, s13_ack_i, s13_err_i, s13_rty_i,

        // Slave 14 Interface

        s14_data_i, s14_data_o, s14_addr_o, s14_sel_o, s14_we_o, s14_cyc_o,

        s14_stb_o, s14_ack_i, s14_err_i, s14_rty_i,

        // Slave 15 Interface

        s15_data_i, s15_data_o, s15_addr_o, s15_sel_o, s15_we_o, s15_cyc_o,

        s15_stb_o, s15_ack_i, s15_err_i, s15_rty_i

        );

////////////////////////////////////////////////////////////////////

//

// Module Parameters

//

parameter               dw      = 32;           // Data bus Width

parameter               aw      = 32;           // Address bus Width

parameter               sw      = dw / 8;       // Number of Select Lines

////////////////////////////////////////////////////////////////////

//

// Module IOs

//

input                   clk_i, rst_i;

// Master Interface

input   [dw-1:0] wb_data_i;

output  [dw-1:0] wb_data_o;

input   [aw-1:0] wb_addr_i;

input   [sw-1:0] wb_sel_i;

input                   wb_we_i;

input                   wb_cyc_i;

input                   wb_stb_i;

output                  wb_ack_o;

output                  wb_err_o;

output                  wb_rty_o;

// Slave 0 Interface

input   [dw-1:0] s0_data_i;

output  [dw-1:0] s0_data_o;

output  [aw-1:0] s0_addr_o;

output  [sw-1:0] s0_sel_o;

output                  s0_we_o;

output                  s0_cyc_o;

output                  s0_stb_o;

input                   s0_ack_i;

input                   s0_err_i;

input                   s0_rty_i;

// Slave 1 Interface

input   [dw-1:0] s1_data_i;

output  [dw-1:0] s1_data_o;

output  [aw-1:0] s1_addr_o;

output  [sw-1:0] s1_sel_o;

output                  s1_we_o;

output                  s1_cyc_o;

output                  s1_stb_o;

input                   s1_ack_i;

input                   s1_err_i;

input                   s1_rty_i;

// Slave 2 Interface

input   [dw-1:0] s2_data_i;

output  [dw-1:0] s2_data_o;

output  [aw-1:0] s2_addr_o;

output  [sw-1:0] s2_sel_o;

output                  s2_we_o;

output                  s2_cyc_o;

output                  s2_stb_o;

input                   s2_ack_i;

input                   s2_err_i;

input                   s2_rty_i;

// Slave 3 Interface

input   [dw-1:0] s3_data_i;

output  [dw-1:0] s3_data_o;

output  [aw-1:0] s3_addr_o;

output  [sw-1:0] s3_sel_o;

output                  s3_we_o;

output                  s3_cyc_o;

output                  s3_stb_o;

input                   s3_ack_i;

input                   s3_err_i;

input                   s3_rty_i;

// Slave 4 Interface

input   [dw-1:0] s4_data_i;

output  [dw-1:0] s4_data_o;

output  [aw-1:0] s4_addr_o;

output  [sw-1:0] s4_sel_o;

output                  s4_we_o;

output                  s4_cyc_o;

output                  s4_stb_o;

input                   s4_ack_i;

input                   s4_err_i;

input                   s4_rty_i;

// Slave 5 Interface

input   [dw-1:0] s5_data_i;

output  [dw-1:0] s5_data_o;

output  [aw-1:0] s5_addr_o;

output  [sw-1:0] s5_sel_o;

output                  s5_we_o;

output                  s5_cyc_o;

output                  s5_stb_o;

input                   s5_ack_i;

input                   s5_err_i;

input                   s5_rty_i;

// Slave 6 Interface

input   [dw-1:0] s6_data_i;

output  [dw-1:0] s6_data_o;

output  [aw-1:0] s6_addr_o;

output  [sw-1:0] s6_sel_o;

output                  s6_we_o;

output                  s6_cyc_o;

output                  s6_stb_o;

input                   s6_ack_i;

input                   s6_err_i;

input                   s6_rty_i;

// Slave 7 Interface

input   [dw-1:0] s7_data_i;

output  [dw-1:0] s7_data_o;

output  [aw-1:0] s7_addr_o;

output  [sw-1:0] s7_sel_o;

output                  s7_we_o;

output                  s7_cyc_o;

output                  s7_stb_o;

input                   s7_ack_i;

input                   s7_err_i;

input                   s7_rty_i;

// Slave 8 Interface

input   [dw-1:0] s8_data_i;

output  [dw-1:0] s8_data_o;

output  [aw-1:0] s8_addr_o;

output  [sw-1:0] s8_sel_o;

output                  s8_we_o;

output                  s8_cyc_o;

output                  s8_stb_o;

input                   s8_ack_i;

input                   s8_err_i;

input                   s8_rty_i;

// Slave 9 Interface

input   [dw-1:0] s9_data_i;

output  [dw-1:0] s9_data_o;

output  [aw-1:0] s9_addr_o;

output  [sw-1:0] s9_sel_o;

output                  s9_we_o;

output                  s9_cyc_o;

output                  s9_stb_o;

input                   s9_ack_i;

input                   s9_err_i;

input                   s9_rty_i;

// Slave 10 Interface

input   [dw-1:0] s10_data_i;

output  [dw-1:0] s10_data_o;

output  [aw-1:0] s10_addr_o;

output  [sw-1:0] s10_sel_o;

output                  s10_we_o;

output                  s10_cyc_o;

output                  s10_stb_o;

input                   s10_ack_i;

input                   s10_err_i;

input                   s10_rty_i;

// Slave 11 Interface

input   [dw-1:0] s11_data_i;

output  [dw-1:0] s11_data_o;

output  [aw-1:0] s11_addr_o;

output  [sw-1:0] s11_sel_o;

output                  s11_we_o;

output                  s11_cyc_o;

output                  s11_stb_o;

input                   s11_ack_i;

input                   s11_err_i;

input                   s11_rty_i;

// Slave 12 Interface

input   [dw-1:0] s12_data_i;

output  [dw-1:0] s12_data_o;

output  [aw-1:0] s12_addr_o;

output  [sw-1:0] s12_sel_o;

output                  s12_we_o;

output                  s12_cyc_o;

output                  s12_stb_o;

input                   s12_ack_i;

input                   s12_err_i;

input                   s12_rty_i;

// Slave 13 Interface

input   [dw-1:0] s13_data_i;

output  [dw-1:0] s13_data_o;

output  [aw-1:0] s13_addr_o;

output  [sw-1:0] s13_sel_o;

output                  s13_we_o;

output                  s13_cyc_o;

output                  s13_stb_o;

input                   s13_ack_i;

input                   s13_err_i;

input                   s13_rty_i;

// Slave 14 Interface

input   [dw-1:0] s14_data_i;

output  [dw-1:0] s14_data_o;

output  [aw-1:0] s14_addr_o;

output  [sw-1:0] s14_sel_o;

output                  s14_we_o;

output                  s14_cyc_o;

output                  s14_stb_o;

input                   s14_ack_i;

input                   s14_err_i;

input                   s14_rty_i;

// Slave 15 Interface

input   [dw-1:0] s15_data_i;

output  [dw-1:0] s15_data_o;

output  [aw-1:0] s15_addr_o;

output  [sw-1:0] s15_sel_o;

output                  s15_we_o;

output                  s15_cyc_o;

output                  s15_stb_o;

input                   s15_ack_i;

input                   s15_err_i;

input                   s15_rty_i;

////////////////////////////////////////////////////////////////////

//

// Local Wires

//

reg     [dw-1:0] wb_data_o;

reg                     wb_ack_o;

reg                     wb_err_o;

reg                     wb_rty_o;

wire    [3:0]            slv_sel;

////////////////////////////////////////////////////////////////////

//

// Select logic

//

assign slv_sel = wb_addr_i[aw-1:aw-4];

////////////////////////////////////////////////////////////////////

//

// Address & Data Pass

//

assign s0_addr_o = wb_addr_i;

assign s1_addr_o = wb_addr_i;

assign s2_addr_o = wb_addr_i;

assign s3_addr_o = wb_addr_i;

assign s4_addr_o = wb_addr_i;

assign s5_addr_o = wb_addr_i;

assign s6_addr_o = wb_addr_i;

assign s7_addr_o = wb_addr_i;

assign s8_addr_o = wb_addr_i;

assign s9_addr_o = wb_addr_i;

assign s10_addr_o = wb_addr_i;

assign s11_addr_o = wb_addr_i;

assign s12_addr_o = wb_addr_i;

assign s13_addr_o = wb_addr_i;

assign s14_addr_o = wb_addr_i;

assign s15_addr_o = wb_addr_i;

assign s0_sel_o = wb_sel_i;

assign s1_sel_o = wb_sel_i;

assign s2_sel_o = wb_sel_i;

assign s3_sel_o = wb_sel_i;

assign s4_sel_o = wb_sel_i;

assign s5_sel_o = wb_sel_i;

assign s6_sel_o = wb_sel_i;

assign s7_sel_o = wb_sel_i;

assign s8_sel_o = wb_sel_i;

assign s9_sel_o = wb_sel_i;

assign s10_sel_o = wb_sel_i;

assign s11_sel_o = wb_sel_i;

assign s12_sel_o = wb_sel_i;

assign s13_sel_o = wb_sel_i;

assign s14_sel_o = wb_sel_i;

assign s15_sel_o = wb_sel_i;

assign s0_data_o = wb_data_i;

assign s1_data_o = wb_data_i;

assign s2_data_o = wb_data_i;

assign s3_data_o = wb_data_i;

assign s4_data_o = wb_data_i;

assign s5_data_o = wb_data_i;

assign s6_data_o = wb_data_i;

assign s7_data_o = wb_data_i;

assign s8_data_o = wb_data_i;

assign s9_data_o = wb_data_i;

assign s10_data_o = wb_data_i;

assign s11_data_o = wb_data_i;

assign s12_data_o = wb_data_i;

assign s13_data_o = wb_data_i;

assign s14_data_o = wb_data_i;

assign s15_data_o = wb_data_i;

always @(slv_sel or s0_data_i or s1_data_i or s2_data_i or s3_data_i or

        s4_data_i or s5_data_i or s6_data_i or s7_data_i or s8_data_i or

        s9_data_i or s10_data_i or s11_data_i or s12_data_i or

        s13_data_i or s14_data_i or s15_data_i)

        case(slv_sel)   // synopsys parallel_case

           4'd0:        wb_data_o = s0_data_i;

           4'd1:        wb_data_o = s1_data_i;

           4'd2:        wb_data_o = s2_data_i;

           4'd3:        wb_data_o = s3_data_i;

           4'd4:        wb_data_o = s4_data_i;

           4'd5:        wb_data_o = s5_data_i;

           4'd6:        wb_data_o = s6_data_i;

           4'd7:        wb_data_o = s7_data_i;

           4'd8:        wb_data_o = s8_data_i;

           4'd9:        wb_data_o = s9_data_i;

           4'd10:       wb_data_o = s10_data_i;

           4'd11:       wb_data_o = s11_data_i;

           4'd12:       wb_data_o = s12_data_i;

           4'd13:       wb_data_o = s13_data_i;

           4'd14:       wb_data_o = s14_data_i;

           4'd15:       wb_data_o = s15_data_i;

           default:     wb_data_o = {dw{1'bx}};

        endcase

////////////////////////////////////////////////////////////////////

//

// Control Signal Pass

//

assign s0_we_o = wb_we_i;

assign s1_we_o = wb_we_i;

assign s2_we_o = wb_we_i;

assign s3_we_o = wb_we_i;

assign s4_we_o = wb_we_i;

assign s5_we_o = wb_we_i;

assign s6_we_o = wb_we_i;

assign s7_we_o = wb_we_i;

assign s8_we_o = wb_we_i;

assign s9_we_o = wb_we_i;

assign s10_we_o = wb_we_i;

assign s11_we_o = wb_we_i;

assign s12_we_o = wb_we_i;

assign s13_we_o = wb_we_i;

assign s14_we_o = wb_we_i;

assign s15_we_o = wb_we_i;

assign s0_cyc_o = (wb_cyc_i & !wb_stb_i) ? s0_cyc_o : ((slv_sel==4'd0) ? wb_cyc_i : 1'b0);

assign s1_cyc_o = (wb_cyc_i & !wb_stb_i) ? s1_cyc_o : ((slv_sel==4'd1) ? wb_cyc_i : 1'b0);

assign s2_cyc_o = (wb_cyc_i & !wb_stb_i) ? s2_cyc_o : ((slv_sel==4'd2) ? wb_cyc_i : 1'b0);

assign s3_cyc_o = (wb_cyc_i & !wb_stb_i) ? s3_cyc_o : ((slv_sel==4'd3) ? wb_cyc_i : 1'b0);

assign s4_cyc_o = (wb_cyc_i & !wb_stb_i) ? s4_cyc_o : ((slv_sel==4'd4) ? wb_cyc_i : 1'b0);

assign s5_cyc_o = (wb_cyc_i & !wb_stb_i) ? s5_cyc_o : ((slv_sel==4'd5) ? wb_cyc_i : 1'b0);

assign s6_cyc_o = (wb_cyc_i & !wb_stb_i) ? s6_cyc_o : ((slv_sel==4'd6) ? wb_cyc_i : 1'b0);

assign s7_cyc_o = (wb_cyc_i & !wb_stb_i) ? s7_cyc_o : ((slv_sel==4'd7) ? wb_cyc_i : 1'b0);

assign s8_cyc_o = (wb_cyc_i & !wb_stb_i) ? s8_cyc_o : ((slv_sel==4'd8) ? wb_cyc_i : 1'b0);

assign s9_cyc_o = (wb_cyc_i & !wb_stb_i) ? s9_cyc_o : ((slv_sel==4'd9) ? wb_cyc_i : 1'b0);

assign s10_cyc_o = (wb_cyc_i & !wb_stb_i) ? s10_cyc_o : ((slv_sel==4'd10) ? wb_cyc_i : 1'b0);

assign s11_cyc_o = (wb_cyc_i & !wb_stb_i) ? s11_cyc_o : ((slv_sel==4'd11) ? wb_cyc_i : 1'b0);

assign s12_cyc_o = (wb_cyc_i & !wb_stb_i) ? s12_cyc_o : ((slv_sel==4'd12) ? wb_cyc_i : 1'b0);

assign s13_cyc_o = (wb_cyc_i & !wb_stb_i) ? s13_cyc_o : ((slv_sel==4'd13) ? wb_cyc_i : 1'b0);

assign s14_cyc_o = (wb_cyc_i & !wb_stb_i) ? s14_cyc_o : ((slv_sel==4'd14) ? wb_cyc_i : 1'b0);

assign s15_cyc_o = (wb_cyc_i & !wb_stb_i) ? s15_cyc_o : ((slv_sel==4'd15) ? wb_cyc_i : 1'b0);

assign s0_stb_o = (slv_sel==4'd0) ? wb_stb_i : 1'b0;

assign s1_stb_o = (slv_sel==4'd1) ? wb_stb_i : 1'b0;

assign s2_stb_o = (slv_sel==4'd2) ? wb_stb_i : 1'b0;

assign s3_stb_o = (slv_sel==4'd3) ? wb_stb_i : 1'b0;

assign s4_stb_o = (slv_sel==4'd4) ? wb_stb_i : 1'b0;

assign s5_stb_o = (slv_sel==4'd5) ? wb_stb_i : 1'b0;

assign s6_stb_o = (slv_sel==4'd6) ? wb_stb_i : 1'b0;

assign s7_stb_o = (slv_sel==4'd7) ? wb_stb_i : 1'b0;

assign s8_stb_o = (slv_sel==4'd8) ? wb_stb_i : 1'b0;

assign s9_stb_o = (slv_sel==4'd9) ? wb_stb_i : 1'b0;

assign s10_stb_o = (slv_sel==4'd10) ? wb_stb_i : 1'b0;

assign s11_stb_o = (slv_sel==4'd11) ? wb_stb_i : 1'b0;

assign s12_stb_o = (slv_sel==4'd12) ? wb_stb_i : 1'b0;

assign s13_stb_o = (slv_sel==4'd13) ? wb_stb_i : 1'b0;

assign s14_stb_o = (slv_sel==4'd14) ? wb_stb_i : 1'b0;

assign s15_stb_o = (slv_sel==4'd15) ? wb_stb_i : 1'b0;

always @(slv_sel or s0_ack_i or s1_ack_i or s2_ack_i or s3_ack_i or

        s4_ack_i or s5_ack_i or s6_ack_i or s7_ack_i or s8_ack_i or

        s9_ack_i or s10_ack_i or s11_ack_i or s12_ack_i or

        s13_ack_i or s14_ack_i or s15_ack_i)

        case(slv_sel)   // synopsys parallel_case

           4'd0:        wb_ack_o = s0_ack_i;

           4'd1:        wb_ack_o = s1_ack_i;

           4'd2:        wb_ack_o = s2_ack_i;

           4'd3:        wb_ack_o = s3_ack_i;

           4'd4:        wb_ack_o = s4_ack_i;

           4'd5:        wb_ack_o = s5_ack_i;

           4'd6:        wb_ack_o = s6_ack_i;

           4'd7:        wb_ack_o = s7_ack_i;

           4'd8:        wb_ack_o = s8_ack_i;

           4'd9:        wb_ack_o = s9_ack_i;

           4'd10:       wb_ack_o = s10_ack_i;

           4'd11:       wb_ack_o = s11_ack_i;

           4'd12:       wb_ack_o = s12_ack_i;

           4'd13:       wb_ack_o = s13_ack_i;

           4'd14:       wb_ack_o = s14_ack_i;

           4'd15:       wb_ack_o = s15_ack_i;

           default:     wb_ack_o = 1'b0;

        endcase

always @(slv_sel or s0_err_i or s1_err_i or s2_err_i or s3_err_i or

        s4_err_i or s5_err_i or s6_err_i or s7_err_i or s8_err_i or

        s9_err_i or s10_err_i or s11_err_i or s12_err_i or

        s13_err_i or s14_err_i or s15_err_i)

        case(slv_sel)   // synopsys parallel_case

           4'd0:        wb_err_o = s0_err_i;

           4'd1:        wb_err_o = s1_err_i;

           4'd2:        wb_err_o = s2_err_i;

           4'd3:        wb_err_o = s3_err_i;

           4'd4:        wb_err_o = s4_err_i;

           4'd5:        wb_err_o = s5_err_i;

           4'd6:        wb_err_o = s6_err_i;

           4'd7:        wb_err_o = s7_err_i;

           4'd8:        wb_err_o = s8_err_i;

           4'd9:        wb_err_o = s9_err_i;

           4'd10:       wb_err_o = s10_err_i;

           4'd11:       wb_err_o = s11_err_i;

           4'd12:       wb_err_o = s12_err_i;

           4'd13:       wb_err_o = s13_err_i;

           4'd14:       wb_err_o = s14_err_i;

           4'd15:       wb_err_o = s15_err_i;

           default:     wb_err_o = 1'b0;

        endcase

always @(slv_sel or s0_rty_i or s1_rty_i or s2_rty_i or s3_rty_i or

        s4_rty_i or s5_rty_i or s6_rty_i or s7_rty_i or s8_rty_i or

        s9_rty_i or s10_rty_i or s11_rty_i or s12_rty_i or

        s13_rty_i or s14_rty_i or s15_rty_i)

        case(slv_sel)   // synopsys parallel_case

           4'd0:        wb_rty_o = s0_rty_i;

           4'd1:        wb_rty_o = s1_rty_i;

           4'd2:        wb_rty_o = s2_rty_i;

           4'd3:        wb_rty_o = s3_rty_i;

           4'd4:        wb_rty_o = s4_rty_i;

           4'd5:        wb_rty_o = s5_rty_i;

           4'd6:        wb_rty_o = s6_rty_i;

           4'd7:        wb_rty_o = s7_rty_i;

           4'd8:        wb_rty_o = s8_rty_i;

           4'd9:        wb_rty_o = s9_rty_i;

           4'd10:       wb_rty_o = s10_rty_i;

           4'd11:       wb_rty_o = s11_rty_i;

           4'd12:       wb_rty_o = s12_rty_i;

           4'd13:       wb_rty_o = s13_rty_i;

           4'd14:       wb_rty_o = s14_rty_i;

           4'd15:       wb_rty_o = s15_rty_i;

           default:     wb_rty_o = 1'b0;

        endcase

endmodule