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[/] [pci/] [tags/] [asyst_3/] [rtl/] [verilog/] [pci_wb_addr_mux.v] - Rev 154
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////////////////////////////////////////////////////////////////////// //// //// //// File name "wb_addr_mux.v" //// //// //// //// This file is part of the "PCI bridge" project //// //// http://www.opencores.org/cores/pci/ //// //// //// //// Author(s): //// //// - Miha Dolenc (mihad@opencores.org) //// //// //// //// All additional information is avaliable in the README //// //// file. //// //// //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000 Miha Dolenc, mihad@opencores.org //// //// //// //// 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 source file is free software; you can redistribute it //// //// and/or modify it under the terms of the GNU Lesser General //// //// Public License as published by the Free Software Foundation; //// //// either version 2.1 of the License, or (at your option) any //// //// later version. //// //// //// //// This source is distributed in the hope that it will be //// //// useful, but WITHOUT ANY WARRANTY; without even the implied //// //// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// //// PURPOSE. See the GNU Lesser General Public License for more //// //// details. //// //// //// //// You should have received a copy of the GNU Lesser General //// //// Public License along with this source; if not, download it //// //// from http://www.opencores.org/lgpl.shtml //// //// //// ////////////////////////////////////////////////////////////////////// // // CVS Revision History // // $Log: not supported by cvs2svn $ // Revision 1.4 2002/08/19 16:54:25 mihad // Got rid of undef directives // // Revision 1.3 2002/02/01 15:25:13 mihad // Repaired a few bugs, updated specification, added test bench files and design document // // Revision 1.2 2001/10/05 08:14:30 mihad // Updated all files with inclusion of timescale file for simulation purposes. // // Revision 1.1.1.1 2001/10/02 15:33:47 mihad // New project directory structure // // // module provides instantiation of address decoders and address multiplexer for various number of implemented wishbone images `include "pci_constants.v" // synopsys translate_off `include "timescale.v" // synopsys translate_on module pci_wb_addr_mux ( `ifdef REGISTER_WBS_OUTPUTS clk_in, reset_in, sample_address_in, `endif address_in, bar0_in, bar1_in, bar2_in, bar3_in, bar4_in, bar5_in, am0_in, am1_in, am2_in, am3_in, am4_in, am5_in, ta0_in, ta1_in, ta2_in, ta3_in, ta4_in, ta5_in, at_en_in, hit_out, address_out ); input [31:0] address_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] bar0_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] bar1_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] bar2_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] bar3_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] bar4_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] bar5_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] am0_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] am1_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] am2_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] am3_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] am4_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] am5_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] ta0_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] ta1_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] ta2_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] ta3_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] ta4_in ; input [(`WB_NUM_OF_DEC_ADDR_LINES - 1):0] ta5_in ; input [5:0] at_en_in ; output [5:0] hit_out ; output [31:0] address_out ; reg [31:0] address_out ; wire [31:0] addr0 ; wire [31:0] addr1 ; wire [31:0] addr2 ; wire [31:0] addr3 ; wire [31:0] addr4 ; wire [31:0] addr5 ; wire [5:0] hit ; assign hit_out = hit ; `ifdef REGISTER_WBS_OUTPUTS input clk_in, reset_in, sample_address_in ; reg [31:0] address ; always@(posedge clk_in or posedge reset_in) begin if ( reset_in ) address <= #`FF_DELAY 0 ; else if ( sample_address_in ) address <= #`FF_DELAY address_in ; end `else wire [31:0] address = address_in ; `endif `ifdef GUEST `ifdef NO_CNF_IMAGE `else `define PCI_WB_ADDR_MUX_DEC0_INCLUDE `endif `else `ifdef HOST `define PCI_WB_ADDR_MUX_DEC0_INCLUDE `endif `endif `ifdef PCI_WB_ADDR_MUX_DEC0_INCLUDE pci_wb_decoder #(`WB_NUM_OF_DEC_ADDR_LINES) dec0 ( .hit (hit[0]), .addr_out (addr0), .addr_in (address), .base_addr (bar0_in), .mask_addr (am0_in), .tran_addr (ta0_in), .at_en (1'b0) ) ; `else // configuration image not implemented assign hit[0] = 1'b0 ; assign addr0 = 32'h0000_0000 ; `endif // one image is always implemented pci_wb_decoder #(`WB_NUM_OF_DEC_ADDR_LINES) dec1 ( .hit (hit[1]), .addr_out (addr1), .addr_in (address), .base_addr (bar1_in), .mask_addr (am1_in), .tran_addr (ta1_in), .at_en (at_en_in[1]) ) ; `ifdef WB_IMAGE2 pci_wb_decoder #(`WB_NUM_OF_DEC_ADDR_LINES) dec2 ( .hit (hit[2]), .addr_out (addr2), .addr_in (address), .base_addr (bar2_in), .mask_addr (am2_in), .tran_addr (ta2_in), .at_en (at_en_in[2]) ) ; `else assign hit[2] = 1'b0 ; assign addr2 = 0 ; `endif `ifdef WB_IMAGE3 pci_wb_decoder #(`WB_NUM_OF_DEC_ADDR_LINES) dec3 ( .hit (hit[3]), .addr_out (addr3), .addr_in (address), .base_addr (bar3_in), .mask_addr (am3_in), .tran_addr (ta3_in), .at_en (at_en_in[3]) ) ; `else assign hit[3] = 1'b0 ; assign addr3 = 0 ; `endif `ifdef WB_IMAGE4 pci_wb_decoder #(`WB_NUM_OF_DEC_ADDR_LINES) dec4 ( .hit (hit[4]), .addr_out (addr4), .addr_in (address), .base_addr (bar4_in), .mask_addr (am4_in), .tran_addr (ta4_in), .at_en (at_en_in[4]) ) ; `else assign hit[4] = 1'b0 ; assign addr4 = 0 ; `endif `ifdef WB_IMAGE5 pci_wb_decoder #(`WB_NUM_OF_DEC_ADDR_LINES) dec5 ( .hit (hit[5]), .addr_out (addr5), .addr_in (address), .base_addr (bar5_in), .mask_addr (am5_in), .tran_addr (ta5_in), .at_en (at_en_in[5]) ) ; `else assign hit[5] = 1'b0 ; assign addr5 = 0 ; `endif // address multiplexer always@ ( hit or addr0 or addr1 or addr2 or addr3 or addr4 or addr5 ) begin case ( {hit[5:2], hit[0]} ) 5'b0_0_0_0_1: address_out = addr0 ; 5'b0_0_0_1_0: address_out = addr2 ; 5'b0_0_1_0_0: address_out = addr3 ; 5'b0_1_0_0_0: address_out = addr4 ; 5'b1_0_0_0_0: address_out = addr5 ; // default address is address from decoder 1 - it is always implemented - in case of stripped down core to only one image // this multiplexer can be completely removed during synthesys default: address_out = addr1 ; endcase end endmodule