[raggedstone] / ethernet / source / pci / pci_in_reg.v

//////////////////////////////////////////////////////////////////////
////                                                              ////
////  File name: pci_in_reg.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_in_reg.v,v $
// Revision 1.1  2007-03-20 17:50:56  sithglan
// add shit
//
// Revision 1.5  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 1.4  2003/01/27 16:49:31  mihad
// Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed.
//
// 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 08:14:29  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 used for registering PCI input signals
// It provides data flip flops with reset
module pci_in_reg
(    
    reset_in,
    clk_in,
    init_complete_in,

    pci_gnt_in,
    pci_frame_in,
    pci_irdy_in,
    pci_trdy_in,
    pci_stop_in,
    pci_devsel_in,
    pci_idsel_in,
    pci_ad_in,
    pci_cbe_in,

    pci_gnt_reg_out,
    pci_frame_reg_out,
    pci_irdy_reg_out,
    pci_trdy_reg_out,
    pci_stop_reg_out,
    pci_devsel_reg_out,
    pci_idsel_reg_out,
    pci_ad_reg_out,
    pci_cbe_reg_out

);

input			reset_in, clk_in, init_complete_in  ;

input           pci_gnt_in ;
input           pci_frame_in ;
input           pci_irdy_in ;
input           pci_trdy_in ;
input           pci_stop_in ;
input           pci_devsel_in ;
input			pci_idsel_in ;
input [31:0]    pci_ad_in ;
input [3:0]     pci_cbe_in ;

output          pci_gnt_reg_out ;
output          pci_frame_reg_out ;
output          pci_irdy_reg_out ;
output          pci_trdy_reg_out ;
output          pci_stop_reg_out ;
output          pci_devsel_reg_out ;
output			pci_idsel_reg_out ;
output [31:0]   pci_ad_reg_out ;
output [3:0]    pci_cbe_reg_out ;


reg             pci_gnt_reg_out ;
reg             pci_frame_reg_out ;
reg             pci_irdy_reg_out ;
reg             pci_trdy_reg_out ;
reg             pci_stop_reg_out ;
reg             pci_devsel_reg_out ;
reg				pci_idsel_reg_out ;
reg    [31:0]   pci_ad_reg_out ;
reg    [3:0]    pci_cbe_reg_out ;

always@(posedge reset_in or posedge clk_in)
begin
    if ( reset_in )
    begin
		pci_gnt_reg_out		<= #`FF_DELAY 1'b1 ;
		pci_frame_reg_out	<= #`FF_DELAY 1'b0 ;
		pci_irdy_reg_out	<= #`FF_DELAY 1'b1 ;
		pci_trdy_reg_out	<= #`FF_DELAY 1'b1 ;
		pci_stop_reg_out	<= #`FF_DELAY 1'b1 ;
		pci_devsel_reg_out	<= #`FF_DELAY 1'b1 ;
		pci_idsel_reg_out	<= #`FF_DELAY 1'b0 ; // active high!
		pci_ad_reg_out      <= #`FF_DELAY 32'h0000_0000 ;
		pci_cbe_reg_out     <= #`FF_DELAY 4'h0 ;
    end
    else if (init_complete_in)
	begin
		pci_gnt_reg_out		<= #`FF_DELAY pci_gnt_in ;
		pci_frame_reg_out	<= #`FF_DELAY pci_frame_in ;
		pci_irdy_reg_out	<= #`FF_DELAY pci_irdy_in ;
		pci_trdy_reg_out	<= #`FF_DELAY pci_trdy_in ;
		pci_stop_reg_out	<= #`FF_DELAY pci_stop_in ;
		pci_devsel_reg_out	<= #`FF_DELAY pci_devsel_in ;
		pci_idsel_reg_out	<= #`FF_DELAY pci_idsel_in ;
		pci_ad_reg_out      <= #`FF_DELAY pci_ad_in ;
		pci_cbe_reg_out     <= #`FF_DELAY pci_cbe_in ;
	end
end

endmodule
Commit	Line	Data
40a1f26c	1	//////////////////////////////////////////////////////////////////////
	2	//// ////
	3	//// File name: pci_in_reg.v ////
	4	//// ////
	5	//// This file is part of the "PCI bridge" project ////
	6	//// http://www.opencores.org/cores/pci/ ////
	7	//// ////
	8	//// Author(s): ////
	9	//// - Tadej Markovic, tadej@opencores.org ////
	10	//// ////
	11	//// All additional information is avaliable in the README.txt ////
	12	//// file. ////
	13	//// ////
	14	//// ////
	15	//////////////////////////////////////////////////////////////////////
	16	//// ////
	17	//// Copyright (C) 2000 Tadej Markovic, tadej@opencores.org ////
	18	//// ////
	19	//// This source file may be used and distributed without ////
	20	//// restriction provided that this copyright statement is not ////
	21	//// removed from the file and that any derivative work contains ////
	22	//// the original copyright notice and the associated disclaimer. ////
	23	//// ////
	24	//// This source file is free software; you can redistribute it ////
	25	//// and/or modify it under the terms of the GNU Lesser General ////
	26	//// Public License as published by the Free Software Foundation; ////
	27	//// either version 2.1 of the License, or (at your option) any ////
	28	//// later version. ////
	29	//// ////
	30	//// This source is distributed in the hope that it will be ////
	31	//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
	32	//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
	33	//// PURPOSE. See the GNU Lesser General Public License for more ////
	34	//// details. ////
	35	//// ////
	36	//// You should have received a copy of the GNU Lesser General ////
	37	//// Public License along with this source; if not, download it ////
	38	//// from http://www.opencores.org/lgpl.shtml ////
	39	//// ////
	40	//////////////////////////////////////////////////////////////////////
	41	//
	42	// CVS Revision History
	43	//
	44	// $Log: pci_in_reg.v,v $
	45	// Revision 1.1 2007-03-20 17:50:56 sithglan
	46	// add shit
	47	//
	48	// Revision 1.5 2003/12/19 11:11:30 mihad
	49	// Compact PCI Hot Swap support added.
	50	// New testcases added.
	51	// Specification updated.
	52	// Test application changed to support WB B3 cycles.
	53	//
	54	// Revision 1.4 2003/01/27 16:49:31 mihad
	55	// Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed.
	56	//
	57	// Revision 1.3 2002/02/01 15:25:12 mihad
	58	// Repaired a few bugs, updated specification, added test bench files and design document
	59	//
	60	// Revision 1.2 2001/10/05 08:14:29 mihad
	61	// Updated all files with inclusion of timescale file for simulation purposes.
	62	//
	63	// Revision 1.1.1.1 2001/10/02 15:33:46 mihad
	64	// New project directory structure
65	//
66	//
67
68	// synopsys translate_off
69	`include "timescale.v"
70	// synopsys translate_on
71	`include "pci_constants.v"
72	// Module is used for registering PCI input signals
73	// It provides data flip flops with reset
74	module pci_in_reg
75	(
76	reset_in,
77	clk_in,
78	init_complete_in,
79
80	pci_gnt_in,
81	pci_frame_in,
82	pci_irdy_in,
83	pci_trdy_in,
84	pci_stop_in,
85	pci_devsel_in,
86	pci_idsel_in,
87	pci_ad_in,
88	pci_cbe_in,
89
90	pci_gnt_reg_out,
91	pci_frame_reg_out,
92	pci_irdy_reg_out,
93	pci_trdy_reg_out,
94	pci_stop_reg_out,
95	pci_devsel_reg_out,
96	pci_idsel_reg_out,
97	pci_ad_reg_out,
98	pci_cbe_reg_out
99
100	);
101
102	input reset_in, clk_in, init_complete_in ;
103
104	input pci_gnt_in ;
105	input pci_frame_in ;
106	input pci_irdy_in ;
107	input pci_trdy_in ;
108	input pci_stop_in ;
109	input pci_devsel_in ;
110	input pci_idsel_in ;
111	input [31:0] pci_ad_in ;
112	input [3:0] pci_cbe_in ;
113
114	output pci_gnt_reg_out ;
115	output pci_frame_reg_out ;
116	output pci_irdy_reg_out ;
117	output pci_trdy_reg_out ;
118	output pci_stop_reg_out ;
119	output pci_devsel_reg_out ;
120	output pci_idsel_reg_out ;
121	output [31:0] pci_ad_reg_out ;
122	output [3:0] pci_cbe_reg_out ;
123
124
125	reg pci_gnt_reg_out ;
126	reg pci_frame_reg_out ;
127	reg pci_irdy_reg_out ;
128	reg pci_trdy_reg_out ;
129	reg pci_stop_reg_out ;
130	reg pci_devsel_reg_out ;
131	reg pci_idsel_reg_out ;
132	reg [31:0] pci_ad_reg_out ;
133	reg [3:0] pci_cbe_reg_out ;
134
135	always@(posedge reset_in or posedge clk_in)
136	begin
137	if ( reset_in )
138	begin
139	pci_gnt_reg_out <= #`FF_DELAY 1'b1 ;
140	pci_frame_reg_out <= #`FF_DELAY 1'b0 ;
141	pci_irdy_reg_out <= #`FF_DELAY 1'b1 ;
142	pci_trdy_reg_out <= #`FF_DELAY 1'b1 ;
143	pci_stop_reg_out <= #`FF_DELAY 1'b1 ;
144	pci_devsel_reg_out <= #`FF_DELAY 1'b1 ;
145	pci_idsel_reg_out <= #`FF_DELAY 1'b0 ; // active high!
146	pci_ad_reg_out <= #`FF_DELAY 32'h0000_0000 ;
147	pci_cbe_reg_out <= #`FF_DELAY 4'h0 ;
148	end
149	else if (init_complete_in)
150	begin
151	pci_gnt_reg_out <= #`FF_DELAY pci_gnt_in ;
152	pci_frame_reg_out <= #`FF_DELAY pci_frame_in ;
153	pci_irdy_reg_out <= #`FF_DELAY pci_irdy_in ;
154	pci_trdy_reg_out <= #`FF_DELAY pci_trdy_in ;
155	pci_stop_reg_out <= #`FF_DELAY pci_stop_in ;
156	pci_devsel_reg_out <= #`FF_DELAY pci_devsel_in ;
157	pci_idsel_reg_out <= #`FF_DELAY pci_idsel_in ;
158	pci_ad_reg_out <= #`FF_DELAY pci_ad_in ;
159	pci_cbe_reg_out <= #`FF_DELAY pci_cbe_in ;
160	end
161	end
162
163	endmodule