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[/] [pci/] [tags/] [rel_8/] [rtl/] [verilog/] [pci_cur_out_reg.v] - Rev 120
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////////////////////////////////////////////////////////////////////// //// //// //// File name "cur_out_reg.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) 2001 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 1.3 2002/02/01 15:25:12 mihad // Repaired a few bugs, updated specification, added test bench files and design document // // Revision 1.2 2001/10/05 08:14:28 mihad // Updated all files with inclusion of timescale file for simulation purposes. // // Revision 1.1.1.1 2001/10/02 15:33:46 mihad // New project directory structure // // // synopsys translate_off `include "timescale.v" // synopsys translate_on `include "pci_constants.v" // module is only a backup copy of relevant output registers // used in some arhitectures that support IOB registers, which have to have a // fanout of 1 // Otherwise nothing special in this module module pci_cur_out_reg ( reset_in, clk_in, frame_in, frame_load_in, irdy_in, devsel_in, trdy_in, trdy_en_in, stop_in, ad_load_in, cbe_in, cbe_en_in, mas_ad_in, tar_ad_in, frame_en_in, irdy_en_in, mas_ad_en_in, tar_ad_en_in, ad_en_unregistered_in, par_in, par_en_in, perr_in, perr_en_in, serr_in, serr_en_in, frame_out, irdy_out, devsel_out, trdy_out, stop_out, cbe_out, cbe_en_out, ad_out, frame_en_out, irdy_en_out, ad_en_out, mas_ad_en_out, tar_ad_en_out, trdy_en_out, par_out, par_en_out, perr_out, perr_en_out, serr_out, serr_en_out ) ; input reset_in, clk_in ; input frame_in ; input frame_load_in ; input irdy_in ; input devsel_in ; input trdy_in ; input stop_in ; input ad_load_in ; input [3:0] cbe_in ; input cbe_en_in ; input [31:0] mas_ad_in ; input [31:0] tar_ad_in ; input mas_ad_en_in ; input tar_ad_en_in ; input ad_en_unregistered_in ; input frame_en_in, irdy_en_in ; input trdy_en_in ; input par_in ; input par_en_in ; input perr_in ; input perr_en_in ; input serr_in ; input serr_en_in ; output frame_out ; reg frame_out ; output irdy_out ; reg irdy_out ; output devsel_out ; reg devsel_out ; output trdy_out ; reg trdy_out ; output stop_out ; reg stop_out ; output [3:0] cbe_out ; reg [3:0] cbe_out ; output [31:0] ad_out ; reg [31:0] ad_out ; output frame_en_out, irdy_en_out, ad_en_out, cbe_en_out, mas_ad_en_out, tar_ad_en_out, trdy_en_out ; reg frame_en_out, irdy_en_out, cbe_en_out, mas_ad_en_out, tar_ad_en_out, trdy_en_out; output par_out ; output par_en_out ; output perr_out ; output perr_en_out ; output serr_out ; output serr_en_out ; reg par_out ; reg par_en_out ; reg perr_out ; reg perr_en_out ; reg serr_out ; reg serr_en_out ; assign ad_en_out = mas_ad_en_out || tar_ad_en_out ; always@(posedge reset_in or posedge clk_in) begin if ( reset_in ) begin irdy_out <= #`FF_DELAY 1'b1 ; devsel_out <= #`FF_DELAY 1'b1 ; trdy_out <= #`FF_DELAY 1'b1 ; stop_out <= #`FF_DELAY 1'b1 ; frame_en_out <= #`FF_DELAY 1'b0 ; irdy_en_out <= #`FF_DELAY 1'b0 ; mas_ad_en_out<= #`FF_DELAY 1'b0 ; tar_ad_en_out<= #`FF_DELAY 1'b0 ; trdy_en_out <= #`FF_DELAY 1'b0 ; par_out <= #`FF_DELAY 1'b0 ; par_en_out <= #`FF_DELAY 1'b0 ; perr_out <= #`FF_DELAY 1'b1 ; perr_en_out <= #`FF_DELAY 1'b0 ; serr_out <= #`FF_DELAY 1'b1 ; serr_en_out <= #`FF_DELAY 1'b0 ; cbe_en_out <= #`FF_DELAY 1'b0 ; end else begin irdy_out <= #`FF_DELAY irdy_in ; devsel_out <= #`FF_DELAY devsel_in ; trdy_out <= #`FF_DELAY trdy_in ; stop_out <= #`FF_DELAY stop_in ; frame_en_out <= #`FF_DELAY frame_en_in ; irdy_en_out <= #`FF_DELAY irdy_en_in ; mas_ad_en_out<= #`FF_DELAY mas_ad_en_in && ad_en_unregistered_in ; tar_ad_en_out<= #`FF_DELAY tar_ad_en_in && ad_en_unregistered_in ; trdy_en_out <= #`FF_DELAY trdy_en_in ; par_out <= #`FF_DELAY par_in ; par_en_out <= #`FF_DELAY par_en_in ; perr_out <= #`FF_DELAY perr_in ; perr_en_out <= #`FF_DELAY perr_en_in ; serr_out <= #`FF_DELAY serr_in ; serr_en_out <= #`FF_DELAY serr_en_in ; cbe_en_out <= #`FF_DELAY cbe_en_in ; end end always@(posedge reset_in or posedge clk_in) begin if ( reset_in ) cbe_out <= #`FF_DELAY 4'hF ; else if ( ad_load_in ) cbe_out <= #`FF_DELAY cbe_in ; end wire [31:0] ad_source = tar_ad_en_out ? tar_ad_in : mas_ad_in ; always@(posedge reset_in or posedge clk_in) begin if ( reset_in ) ad_out <= #`FF_DELAY 32'h0000_0000 ; else if ( ad_load_in ) ad_out <= #`FF_DELAY ad_source ; end always@(posedge reset_in or posedge clk_in) begin if ( reset_in ) frame_out <= #`FF_DELAY 1'b1 ; else if ( frame_load_in ) frame_out <= #`FF_DELAY frame_in ; end endmodule
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