////////////////////////////////////////////////////////////////////// //// //// //// File name: pci_rst_int.v //// //// //// //// This file is part of the "PCI bridge" project //// //// http://www.opencores.org/cores/pci/ //// //// //// //// Author(s): //// //// - Tadej Markovic, tadej@opencores.org //// //// //// //// All additional information is avaliable in the README.txt //// //// file. //// //// //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000 Tadej Markovic, tadej@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: pci_rst_int.v,v $ // Revision 1.1 2007-03-20 17:50:56 sithglan // add shit // // Revision 1.3 2003/12/19 11:11:30 mihad // Compact PCI Hot Swap support added. // New testcases added. // Specification updated. // Test application changed to support WB B3 cycles. // // Revision 1.2 2003/01/27 16:49:31 mihad // Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed. // // Revision 1.1 2002/02/01 14:43:31 mihad // *** empty log message *** // // // `include "pci_constants.v" // synopsys translate_off `include "timescale.v" // synopsys translate_on // Module is used to switch appropriate reset and interrupt signals with few logic module pci_rst_int ( clk_in, // reset signals rst_i, pci_rstn_in, conf_soft_res_in, reset, pci_rstn_out, pci_rstn_en_out, rst_o, // interrupt signals pci_intan_in, conf_int_in, int_i, pci_intan_out, pci_intan_en_out, int_o, conf_isr_int_prop_out, init_complete_in ); input clk_in; // RESET inputs and outputs input rst_i; input pci_rstn_in; input conf_soft_res_in; output reset; output pci_rstn_out; output pci_rstn_en_out; output rst_o; // INTERRUPT inputs and outputs input pci_intan_in; input conf_int_in; input int_i; output pci_intan_out; output pci_intan_en_out; output int_o; output conf_isr_int_prop_out; input init_complete_in ; /*-------------------------------------------------------------------------------------------------------- RESET logic --------------------------------------------------------------------------------------------------------*/ assign pci_rstn_out = 1'b0 ; // host implementation of the bridge gets its reset from WISHBONE bus - RST_I and propagates it to PCI bus `ifdef HOST assign reset = rst_i ; `ifdef ACTIVE_LOW_OE assign pci_rstn_en_out = ~(rst_i || conf_soft_res_in) ; `else assign pci_rstn_en_out = rst_i || conf_soft_res_in ; `endif assign rst_o = 1'b0 ; `else // guest implementation of the bridge gets its reset from PCI bus - RST# and propagates it to WISHBONE bus `ifdef GUEST assign reset = ~pci_rstn_in ; assign rst_o = (~pci_rstn_in) || conf_soft_res_in ; `ifdef ACTIVE_LOW_OE assign pci_rstn_en_out = 1'b1 ; // disabled `else assign pci_rstn_en_out = 1'b0 ; // disabled `endif `endif `endif /*-------------------------------------------------------------------------------------------------------- INTERRUPT logic --------------------------------------------------------------------------------------------------------*/ assign pci_intan_out = 1'b0 ; // host implementation of the bridge gets its interrupt from PCI bus - INTA# and propagates it to WISHBONE bus `ifdef HOST assign conf_isr_int_prop_out = ~pci_intan_in ; assign int_o = conf_int_in ; `ifdef ACTIVE_LOW_OE assign pci_intan_en_out = 1'b1 ; // disabled `else assign pci_intan_en_out = 1'b0 ; // disabled `endif `else // guest implementation of the bridge gets its interrupt from WISHBONE bus - INT_I and propagates it to PCI bus `ifdef GUEST wire interrupt_a_en; pci_out_reg inta ( .reset_in ( reset ), .clk_in ( clk_in) , .dat_en_in ( 1'b1 ), .en_en_in ( init_complete_in ), .dat_in ( 1'b0 ) , // active low .en_in ( conf_int_in ) , .en_out ( interrupt_a_en ), .dat_out ( ) ); assign conf_isr_int_prop_out = int_i ; assign int_o = 1'b0 ; assign pci_intan_en_out = interrupt_a_en ; `endif `endif endmodule