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[/] [pci/] [tags/] [rel_11/] [rtl/] [verilog/] [pci_pci_tpram.v] - Blame information for rev 154

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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  Generic Two-Port Synchronous RAM                            ////
////                                                              ////
////  This file is part of pci bridge project                     ////
////  http://www.opencores.org/cvsweb.shtml/pci/                  ////
////                                                              ////
////  Description                                                 ////
////  This block is a wrapper with common two-port                ////
////  synchronous memory interface for different                  ////
////  types of ASIC and FPGA RAMs. Beside universal memory        ////
////  interface it also provides behavioral model of generic      ////
////  two-port synchronous RAM.                                   ////
////  It should be used in all OPENCORES designs that want to be  ////
////  portable accross different target technologies and          ////
////  independent of target memory.                               ////
////                                                              ////
////  Supported ASIC RAMs are:                                    ////
////  - Artisan Double-Port Sync RAM                              ////
////  - Avant! Two-Port Sync RAM (*)                              ////
////  - Virage 2-port Sync RAM                                    ////
////                                                              ////
////  Supported FPGA RAMs are:                                    ////
////  - Xilinx Virtex RAMB4_S16_S16                               ////
////                                                              ////
////  To Do:                                                      ////
////   - fix Avant!                                               ////
////   - xilinx rams need external tri-state logic                ////
////   - add additional RAMs (Altera, VS etc)                     ////
////                                                              ////
////  Author(s):                                                  ////
////      - Damjan Lampret, lampret@opencores.org                 ////
////      - Miha Dolenc, mihad@opencores.org                      ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2000 Authors and 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 1.2  2003/08/14 13:06:03  simons
// synchronizer_flop replaced with pci_synchronizer_flop, artisan ram instance updated.
//
// Revision 1.1  2003/01/27 16:49:31  mihad
// Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed.
//
// Revision 1.7  2002/10/18 03:36:37  tadejm
// Changed wrong signal name mbist_sen into mbist_ctrl_i.
//
// Revision 1.6  2002/10/17 22:51:08  tadejm
// Changed BIST signals for RAMs.
//
// Revision 1.5  2002/10/11 10:09:01  mihad
// Added additional testcase and changed rst name in BIST to trst
//
// Revision 1.4  2002/10/08 17:17:06  mihad
// Added BIST signals for RAMs.
//
// Revision 1.3  2002/09/30 17:22:27  mihad
// Added support for Virtual Silicon two port RAM. Didn't run regression on it yet!
//
// Revision 1.2  2002/08/19 16:51:36  mihad
// Extracted distributed RAM module from wb/pci_tpram.v to its own file, got rid of undef directives
//
// Revision 1.1  2002/02/01 14:43:31  mihad
// *** empty log message ***
//
//
 
// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
`include "pci_constants.v"
 
module pci_pci_tpram
(
        // Generic synchronous two-port RAM interface
        clk_a,
    rst_a,
    ce_a,
    we_a,
    oe_a,
    addr_a,
    di_a,
    do_a,
        clk_b,
    rst_b,
    ce_b,
    we_b,
    oe_b,
    addr_b,
    di_b,
    do_b
`ifdef PCI_BIST
    ,
    // debug chain signals
    mbist_si_i,       // bist scan serial in
    mbist_so_o,       // bist scan serial out
    mbist_ctrl_i        // bist chain shift control
`endif
);
 
//
// Default address and data buses width
//
parameter aw = 8;
parameter dw = 40;
 
//
// Generic synchronous two-port RAM interface
//
input                   clk_a;  // Clock
input                   rst_a;  // Reset
input                   ce_a;   // Chip enable input
input                   we_a;   // Write enable input
input                   oe_a;   // Output enable input
input   [aw-1:0] addr_a; // address bus inputs
input   [dw-1:0] di_a;   // input data bus
output  [dw-1:0] do_a;   // output data bus
input                   clk_b;  // Clock
input                   rst_b;  // Reset
input                   ce_b;   // Chip enable input
input                   we_b;   // Write enable input
input                   oe_b;   // Output enable input
input   [aw-1:0] addr_b; // address bus inputs
input   [dw-1:0] di_b;   // input data bus
output  [dw-1:0] do_b;   // output data bus
 
`ifdef PCI_BIST
// debug chain signals
input   mbist_si_i;       // bist scan serial in
output  mbist_so_o;       // bist scan serial out
input [`PCI_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;       // bist chain shift control
`endif
 
//
// Internal wires and registers
//
 
`ifdef PCI_VS_STP
    `define PCI_PCI_RAM_SELECTED
    `ifdef PCI_BIST
        vs_hdtp_64x40_bist i_vs_hdtp_64x40_bist
    `else
        vs_hdtp_64x40 i_vs_hdtp_64x40
    `endif
        (
            .RCK        (clk_b),
            .WCK        (clk_a),
            .RADR       (addr_b),
            .WADR       (addr_a),
            .DI         (di_a),
            .DOUT       (do_b),
            .REN        (1'b0),
            .WEN        (!we_a)
        `ifdef PCI_BIST
            ,
            // debug chain signals
            .mbist_si_i   (mbist_si_i),
            .mbist_so_o   (mbist_so_o),
            .mbist_ctrl_i   (mbist_ctrl_i)
        `endif
        );
 
    assign do_a = 0 ;
`endif
 
`ifdef PCI_ARTISAN_SDP
    `define PCI_PCI_RAM_SELECTED
    //
    // Instantiation of ASIC memory:
    //
    // Artisan Synchronous Double-Port RAM (ra2sh)
    //
    `ifdef PCI_BIST
        art_hsdp_64x40_bist /*#(dw, 1<<aw, aw) */ artisan_sdp
        (
                .QA(do_a),
                .CLKA(clk_a),
                .CENA(~ce_a),
                .WENA(~we_a),
                .AA(addr_a),
                .DA(di_a),
                .OENA(~oe_a),
                .QB(do_b),
                .CLKB(clk_b),
                .CENB(~ce_b),
                .WENB(~we_b),
                .AB(addr_b),
                .DB(di_b),
                .OENB(~oe_b),
          .mbist_si_i   (mbist_si_i),
          .mbist_so_o   (mbist_so_o),
          .mbist_ctrl_i   (mbist_ctrl_i)
        );
    `else
        art_hsdp_64x40 /*#(dw, 1<<aw, aw) */ artisan_sdp
        (
                .QA(do_a),
                .CLKA(clk_a),
                .CENA(~ce_a),
                .WENA(~we_a),
                .AA(addr_a),
                .DA(di_a),
                .OENA(~oe_a),
                .QB(do_b),
                .CLKB(clk_b),
                .CENB(~ce_b),
                .WENB(~we_b),
                .AB(addr_b),
                .DB(di_b),
                .OENB(~oe_b)
        );
    `endif
`endif
 
`ifdef AVANT_ATP
    `define PCI_PCI_RAM_SELECTED
    //
    // Instantiation of ASIC memory:
    //
    // Avant! Asynchronous Two-Port RAM
    //
    avant_atp avant_atp(
        .web(~we),
        .reb(),
        .oeb(~oe),
        .rcsb(),
        .wcsb(),
        .ra(addr),
        .wa(addr),
        .di(di),
        .do(do)
    );
`endif
 
`ifdef VIRAGE_STP
    `define PCI_PCI_RAM_SELECTED
    //
    // Instantiation of ASIC memory:
    //
    // Virage Synchronous 2-port R/W RAM
    //
    virage_stp virage_stp(
        .QA(do_a),
        .QB(do_b),
 
        .ADRA(addr_a),
        .DA(di_a),
        .WEA(we_a),
        .OEA(oe_a),
        .MEA(ce_a),
        .CLKA(clk_a),
 
        .ADRB(adr_b),
        .DB(di_b),
        .WEB(we_b),
        .OEB(oe_b),
        .MEB(ce_b),
        .CLKB(clk_b)
    );
`endif
 
`ifdef PCI_XILINX_RAMB4
    `define PCI_PCI_RAM_SELECTED
    //
    // Instantiation of FPGA memory:
    //
    // Virtex/Spartan2
    //
 
    //
    // Block 0
    //
 
    RAMB4_S16_S16 ramb4_s16_s16_0(
        .CLKA(clk_a),
        .RSTA(rst_a),
        .ADDRA(addr_a),
        .DIA(di_a[15:0]),
        .ENA(ce_a),
        .WEA(we_a),
        .DOA(do_a[15:0]),
 
        .CLKB(clk_b),
        .RSTB(rst_b),
        .ADDRB(addr_b),
        .DIB(di_b[15:0]),
        .ENB(ce_b),
        .WEB(we_b),
        .DOB(do_b[15:0])
    );
 
    //
    // Block 1
    //
 
    RAMB4_S16_S16 ramb4_s16_s16_1(
        .CLKA(clk_a),
        .RSTA(rst_a),
        .ADDRA(addr_a),
        .DIA(di_a[31:16]),
        .ENA(ce_a),
        .WEA(we_a),
        .DOA(do_a[31:16]),
 
        .CLKB(clk_b),
        .RSTB(rst_b),
        .ADDRB(addr_b),
        .DIB(di_b[31:16]),
        .ENB(ce_b),
        .WEB(we_b),
        .DOB(do_b[31:16])
    );
 
    //
    // Block 2
    //
    // block ram2 wires - non generic width of block rams
    wire [15:0] blk2_di_a = {8'h00, di_a[39:32]} ;
    wire [15:0] blk2_di_b = {8'h00, di_b[39:32]} ;
 
    wire [15:0] blk2_do_a ;
    wire [15:0] blk2_do_b ;
 
    assign do_a[39:32] = blk2_do_a[7:0] ;
    assign do_b[39:32] = blk2_do_b[7:0] ;
 
    RAMB4_S16_S16 ramb4_s16_s16_2(
            .CLKA(clk_a),
            .RSTA(rst_a),
            .ADDRA(addr_a),
            .DIA(blk2_di_a),
            .ENA(ce_a),
            .WEA(we_a),
            .DOA(blk2_do_a),
 
            .CLKB(clk_b),
            .RSTB(rst_b),
            .ADDRB(addr_b),
            .DIB(blk2_di_b),
            .ENB(ce_b),
            .WEB(we_b),
            .DOB(blk2_do_b)
    );
 
`endif
 
`ifdef PCI_XILINX_DIST_RAM
    `define PCI_PCI_RAM_SELECTED
    reg [(aw-1):0] out_address ;
    always@(posedge clk_b or posedge rst_b)
    begin
        if ( rst_b )
            out_address <= #1 0 ;
        else if (ce_b)
            out_address <= #1 addr_b ;
    end
 
    pci_ram_16x40d #(aw) pci_distributed_ram
    (
        .data_out       (do_b),
        .we             (we_a),
        .data_in        (di_a),
        .read_address   (out_address),
        .write_address  (addr_a),
        .wclk           (clk_a)
    );
 
    assign do_a = 0 ;
`endif
 
`ifdef PCI_PCI_RAM_SELECTED
`else
    //
    // Generic two-port synchronous RAM model
    //
 
    //
    // Generic RAM's registers and wires
    //
    reg [dw-1:0] mem [(1<<aw)-1:0];       // RAM content
    reg [dw-1:0] do_reg_a;               // RAM data output register
    reg [dw-1:0] do_reg_b;               // RAM data output register
 
    //
    // Data output drivers
    //
    assign do_a = (oe_a) ? do_reg_a : {dw{1'bz}};
    assign do_b = (oe_b) ? do_reg_b : {dw{1'bz}};
 
    //
    // RAM read and write
    //
    always @(posedge clk_a)
        if (ce_a && !we_a)
                do_reg_a <= #1 mem[addr_a];
        else if (ce_a && we_a)
                mem[addr_a] <= #1 di_a;
 
    //
    // RAM read and write
    //
    always @(posedge clk_b)
        if (ce_b && !we_b)
                do_reg_b <= #1 mem[addr_b];
        else if (ce_b && we_b)
                mem[addr_b] <= #1 di_b;
`endif
 
// synopsys translate_off
initial
begin
    if (dw !== 40)
    begin
        $display("RAM instantiation error! Expected RAM width %d, actual %h!", 40, dw) ;
        $finish ;
    end
    `ifdef XILINX_RAMB4
        if (aw !== 8)
        begin
            $display("RAM instantiation error! Expected RAM address width %d, actual %h!", 40, aw) ;
            $finish ;
        end
    `endif
    // currenlty only artisan ram of depth 256 is supported - they don't provide generic ram models
    `ifdef ARTISAN_SDP
        if (aw !== 8)
        begin
            $display("RAM instantiation error! Expected RAM address width %d, actual %h!", 40, aw) ;
            $finish ;
        end
    `endif
end
// synopsys translate_on
 
endmodule

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[/] [pci/] [tags/] [rel_11/] [rtl/] [verilog/] [pci_pci_tpram.v] - Blame information for rev 154

Line No.	Rev	Author	Line
1	77	mihad	`//////////////////////////////////////////////////////////////////////`
2			`//// ////`
3			`//// Generic Two-Port Synchronous RAM ////`
4			`//// ////`
5			`//// This file is part of pci bridge project ////`
6			`//// http://www.opencores.org/cvsweb.shtml/pci/ ////`
7			`//// ////`
8			`//// Description ////`
9			`//// This block is a wrapper with common two-port ////`
10			`//// synchronous memory interface for different ////`
11			`//// types of ASIC and FPGA RAMs. Beside universal memory ////`
12			`//// interface it also provides behavioral model of generic ////`
13			`//// two-port synchronous RAM. ////`
14			`//// It should be used in all OPENCORES designs that want to be ////`
15			`//// portable accross different target technologies and ////`
16			`//// independent of target memory. ////`
17			`//// ////`
18			`//// Supported ASIC RAMs are: ////`
19			`//// - Artisan Double-Port Sync RAM ////`
20			`//// - Avant! Two-Port Sync RAM (*) ////`
21			`//// - Virage 2-port Sync RAM ////`
22			`//// ////`
23			`//// Supported FPGA RAMs are: ////`
24			`//// - Xilinx Virtex RAMB4_S16_S16 ////`
25			`//// ////`
26			`//// To Do: ////`
27			`//// - fix Avant! ////`
28			`//// - xilinx rams need external tri-state logic ////`
29			`//// - add additional RAMs (Altera, VS etc) ////`
30			`//// ////`
31			`//// Author(s): ////`
32			`//// - Damjan Lampret, lampret@opencores.org ////`
33			`//// - Miha Dolenc, mihad@opencores.org ////`
34			`//// ////`
35			`//////////////////////////////////////////////////////////////////////`
36			`//// ////`
37			`//// Copyright (C) 2000 Authors and OPENCORES.ORG ////`
38			`//// ////`
39			`//// This source file may be used and distributed without ////`
40			`//// restriction provided that this copyright statement is not ////`
41			`//// removed from the file and that any derivative work contains ////`
42			`//// the original copyright notice and the associated disclaimer. ////`
43			`//// ////`
44			`//// This source file is free software; you can redistribute it ////`
45			`//// and/or modify it under the terms of the GNU Lesser General ////`
46			`//// Public License as published by the Free Software Foundation; ////`
47			`//// either version 2.1 of the License, or (at your option) any ////`
48			`//// later version. ////`
49			`//// ////`
50			`//// This source is distributed in the hope that it will be ////`
51			`//// useful, but WITHOUT ANY WARRANTY; without even the implied ////`
52			`//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////`
53			`//// PURPOSE. See the GNU Lesser General Public License for more ////`
54			`//// details. ////`
55			`//// ////`
56			`//// You should have received a copy of the GNU Lesser General ////`
57			`//// Public License along with this source; if not, download it ////`
58			`//// from http://www.opencores.org/lgpl.shtml ////`
59			`//// ////`
60			`//////////////////////////////////////////////////////////////////////`
61			`//`
62			`// CVS Revision History`
63			`//`
64			`// $Log: not supported by cvs2svn $`
65	122	markom	`// Revision 1.2 2003/08/14 13:06:03 simons`
66			`// synchronizer_flop replaced with pci_synchronizer_flop, artisan ram instance updated.`
67			`//`
68	111	simons	`// Revision 1.1 2003/01/27 16:49:31 mihad`
69			`// Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed.`
70			`//`
71	77	mihad	`// Revision 1.7 2002/10/18 03:36:37 tadejm`
72	122	markom	`// Changed wrong signal name mbist_sen into mbist_ctrl_i.`
73	77	mihad	`//`
74			`// Revision 1.6 2002/10/17 22:51:08 tadejm`
75			`// Changed BIST signals for RAMs.`
76			`//`
77			`// Revision 1.5 2002/10/11 10:09:01 mihad`
78			`// Added additional testcase and changed rst name in BIST to trst`
79			`//`
80			`// Revision 1.4 2002/10/08 17:17:06 mihad`
81			`// Added BIST signals for RAMs.`
82			`//`
83			`// Revision 1.3 2002/09/30 17:22:27 mihad`
84			`// Added support for Virtual Silicon two port RAM. Didn't run regression on it yet!`
85			`//`
86			`// Revision 1.2 2002/08/19 16:51:36 mihad`
87			`// Extracted distributed RAM module from wb/pci_tpram.v to its own file, got rid of undef directives`
88			`//`
89			`// Revision 1.1 2002/02/01 14:43:31 mihad`
90			`// * empty log message *`
91			`//`
92			`//`
93
94			`// synopsys translate_off`
95			`include "timescale.v"
96			`// synopsys translate_on`
97			`include "pci_constants.v"
98
99			`module pci_pci_tpram`
100			`(`
101			`// Generic synchronous two-port RAM interface`
102			`clk_a,`
103			`rst_a,`
104			`ce_a,`
105			`we_a,`
106			`oe_a,`
107			`addr_a,`
108			`di_a,`
109			`do_a,`
110			`clk_b,`
111			`rst_b,`
112			`ce_b,`
113			`we_b,`
114			`oe_b,`
115			`addr_b,`
116			`di_b,`
117			`do_b`
118			`ifdef PCI_BIST
119			`,`
120			`// debug chain signals`
121	122	markom	`mbist_si_i, // bist scan serial in`
122			`mbist_so_o, // bist scan serial out`
123			`mbist_ctrl_i // bist chain shift control`
124	77	mihad	`endif
125			`);`
126
127			`//`
128			`// Default address and data buses width`
129			`//`
130			`parameter aw = 8;`
131			`parameter dw = 40;`
132
133			`//`
134			`// Generic synchronous two-port RAM interface`
135			`//`
136			`input clk_a; // Clock`
137			`input rst_a; // Reset`
138			`input ce_a; // Chip enable input`
139			`input we_a; // Write enable input`
140			`input oe_a; // Output enable input`
141			`input [aw-1:0] addr_a; // address bus inputs`
142			`input [dw-1:0] di_a; // input data bus`
143			`output [dw-1:0] do_a; // output data bus`
144			`input clk_b; // Clock`
145			`input rst_b; // Reset`
146			`input ce_b; // Chip enable input`
147			`input we_b; // Write enable input`
148			`input oe_b; // Output enable input`
149			`input [aw-1:0] addr_b; // address bus inputs`
150			`input [dw-1:0] di_b; // input data bus`
151			`output [dw-1:0] do_b; // output data bus`
152
153			`ifdef PCI_BIST
154			`// debug chain signals`
155	122	markom	`input mbist_si_i; // bist scan serial in`
156			`output mbist_so_o; // bist scan serial out`
157			input [`PCI_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i; // bist chain shift control
158	77	mihad	`endif
159
160			`//`
161			`// Internal wires and registers`
162			`//`
163
164			`ifdef PCI_VS_STP
165			`define PCI_PCI_RAM_SELECTED
166			`ifdef PCI_BIST
167			`vs_hdtp_64x40_bist i_vs_hdtp_64x40_bist`
168			`else
169			`vs_hdtp_64x40 i_vs_hdtp_64x40`
170			`endif
171			`(`
172			`.RCK (clk_b),`
173			`.WCK (clk_a),`
174			`.RADR (addr_b),`
175			`.WADR (addr_a),`
176			`.DI (di_a),`
177			`.DOUT (do_b),`
178			`.REN (1'b0),`
179			`.WEN (!we_a)`
180			`ifdef PCI_BIST
181			`,`
182			`// debug chain signals`
183	122	markom	`.mbist_si_i (mbist_si_i),`
184			`.mbist_so_o (mbist_so_o),`
185			`.mbist_ctrl_i (mbist_ctrl_i)`
186	77	mihad	`endif
187			`);`
188
189			`assign do_a = 0 ;`
190			`endif
191
192			`ifdef PCI_ARTISAN_SDP
193			`define PCI_PCI_RAM_SELECTED
194			`//`
195			`// Instantiation of ASIC memory:`
196			`//`
197			`// Artisan Synchronous Double-Port RAM (ra2sh)`
198			`//`
199	111	simons	`ifdef PCI_BIST
200			`art_hsdp_64x40_bist /#(dw, 1<<aw, aw) / artisan_sdp`
201			`(`
202			`.QA(do_a),`
203			`.CLKA(clk_a),`
204			`.CENA(~ce_a),`
205			`.WENA(~we_a),`
206			`.AA(addr_a),`
207			`.DA(di_a),`
208			`.OENA(~oe_a),`
209			`.QB(do_b),`
210			`.CLKB(clk_b),`
211			`.CENB(~ce_b),`
212			`.WENB(~we_b),`
213			`.AB(addr_b),`
214			`.DB(di_b),`
215			`.OENB(~oe_b),`
216	122	markom	`.mbist_si_i (mbist_si_i),`
217			`.mbist_so_o (mbist_so_o),`
218			`.mbist_ctrl_i (mbist_ctrl_i)`
219	111	simons	`);`
220			`else
221			`art_hsdp_64x40 /#(dw, 1<<aw, aw) / artisan_sdp`
222			`(`
223			`.QA(do_a),`
224			`.CLKA(clk_a),`
225			`.CENA(~ce_a),`
226			`.WENA(~we_a),`
227			`.AA(addr_a),`
228			`.DA(di_a),`
229			`.OENA(~oe_a),`
230			`.QB(do_b),`
231			`.CLKB(clk_b),`
232			`.CENB(~ce_b),`
233			`.WENB(~we_b),`
234			`.AB(addr_b),`
235			`.DB(di_b),`
236			`.OENB(~oe_b)`
237			`);`
238			`endif
239	77	mihad	`endif
240
241			`ifdef AVANT_ATP
242			`define PCI_PCI_RAM_SELECTED
243			`//`
244			`// Instantiation of ASIC memory:`
245			`//`
246			`// Avant! Asynchronous Two-Port RAM`
247			`//`
248			`avant_atp avant_atp(`
249			`.web(~we),`
250			`.reb(),`
251			`.oeb(~oe),`
252			`.rcsb(),`
253			`.wcsb(),`
254			`.ra(addr),`
255			`.wa(addr),`
256			`.di(di),`
257			`.do(do)`
258			`);`
259			`endif
260
261			`ifdef VIRAGE_STP
262			`define PCI_PCI_RAM_SELECTED
263			`//`
264			`// Instantiation of ASIC memory:`
265			`//`
266			`// Virage Synchronous 2-port R/W RAM`
267			`//`
268			`virage_stp virage_stp(`
269			`.QA(do_a),`
270			`.QB(do_b),`
271
272			`.ADRA(addr_a),`
273			`.DA(di_a),`
274			`.WEA(we_a),`
275			`.OEA(oe_a),`
276			`.MEA(ce_a),`
277			`.CLKA(clk_a),`
278
279			`.ADRB(adr_b),`
280			`.DB(di_b),`
281			`.WEB(we_b),`
282			`.OEB(oe_b),`
283			`.MEB(ce_b),`
284			`.CLKB(clk_b)`
285			`);`
286			`endif
287
288			`ifdef PCI_XILINX_RAMB4
289			`define PCI_PCI_RAM_SELECTED
290			`//`
291			`// Instantiation of FPGA memory:`
292			`//`
293			`// Virtex/Spartan2`
294			`//`
295
296			`//`
297			`// Block 0`
298			`//`
299
300			`RAMB4_S16_S16 ramb4_s16_s16_0(`
301			`.CLKA(clk_a),`
302			`.RSTA(rst_a),`
303			`.ADDRA(addr_a),`
304			`.DIA(di_a[15:0]),`
305			`.ENA(ce_a),`
306			`.WEA(we_a),`
307			`.DOA(do_a[15:0]),`
308
309			`.CLKB(clk_b),`
310			`.RSTB(rst_b),`
311			`.ADDRB(addr_b),`
312			`.DIB(di_b[15:0]),`
313			`.ENB(ce_b),`
314			`.WEB(we_b),`
315			`.DOB(do_b[15:0])`
316			`);`
317
318			`//`
319			`// Block 1`
320			`//`
321
322			`RAMB4_S16_S16 ramb4_s16_s16_1(`
323			`.CLKA(clk_a),`
324			`.RSTA(rst_a),`
325			`.ADDRA(addr_a),`
326			`.DIA(di_a[31:16]),`
327			`.ENA(ce_a),`
328			`.WEA(we_a),`
329			`.DOA(do_a[31:16]),`
330
331			`.CLKB(clk_b),`
332			`.RSTB(rst_b),`
333			`.ADDRB(addr_b),`
334			`.DIB(di_b[31:16]),`
335			`.ENB(ce_b),`
336			`.WEB(we_b),`
337			`.DOB(do_b[31:16])`
338			`);`
339
340			`//`
341			`// Block 2`
342			`//`
343			`// block ram2 wires - non generic width of block rams`
344			`wire [15:0] blk2_di_a = {8'h00, di_a[39:32]} ;`
345			`wire [15:0] blk2_di_b = {8'h00, di_b[39:32]} ;`
346
347			`wire [15:0] blk2_do_a ;`
348			`wire [15:0] blk2_do_b ;`
349
350			`assign do_a[39:32] = blk2_do_a[7:0] ;`
351			`assign do_b[39:32] = blk2_do_b[7:0] ;`
352
353			`RAMB4_S16_S16 ramb4_s16_s16_2(`
354			`.CLKA(clk_a),`
355			`.RSTA(rst_a),`
356			`.ADDRA(addr_a),`
357			`.DIA(blk2_di_a),`
358			`.ENA(ce_a),`
359			`.WEA(we_a),`
360			`.DOA(blk2_do_a),`
361
362			`.CLKB(clk_b),`
363			`.RSTB(rst_b),`
364			`.ADDRB(addr_b),`
365			`.DIB(blk2_di_b),`
366			`.ENB(ce_b),`
367			`.WEB(we_b),`
368			`.DOB(blk2_do_b)`
369			`);`
370
371			`endif
372
373			`ifdef PCI_XILINX_DIST_RAM
374			`define PCI_PCI_RAM_SELECTED
375			`reg [(aw-1):0] out_address ;`
376			`always@(posedge clk_b or posedge rst_b)`
377			`begin`
378			`if ( rst_b )`
379			`out_address <= #1 0 ;`
380			`else if (ce_b)`
381			`out_address <= #1 addr_b ;`
382			`end`
383
384			`pci_ram_16x40d #(aw) pci_distributed_ram`
385			`(`
386			`.data_out (do_b),`
387			`.we (we_a),`
388			`.data_in (di_a),`
389			`.read_address (out_address),`
390			`.write_address (addr_a),`
391			`.wclk (clk_a)`
392			`);`
393
394			`assign do_a = 0 ;`
395			`endif
396
397			`ifdef PCI_PCI_RAM_SELECTED
398			`else
399			`//`
400			`// Generic two-port synchronous RAM model`
401			`//`
402
403			`//`
404			`// Generic RAM's registers and wires`
405			`//`
406			`reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content`
407			`reg [dw-1:0] do_reg_a; // RAM data output register`
408			`reg [dw-1:0] do_reg_b; // RAM data output register`
409
410			`//`
411			`// Data output drivers`
412			`//`
413			`assign do_a = (oe_a) ? do_reg_a : {dw{1'bz}};`
414			`assign do_b = (oe_b) ? do_reg_b : {dw{1'bz}};`
415
416			`//`
417			`// RAM read and write`
418			`//`
419			`always @(posedge clk_a)`
420			`if (ce_a && !we_a)`
421			`do_reg_a <= #1 mem[addr_a];`
422			`else if (ce_a && we_a)`
423			`mem[addr_a] <= #1 di_a;`
424
425			`//`
426			`// RAM read and write`
427			`//`
428			`always @(posedge clk_b)`
429			`if (ce_b && !we_b)`
430			`do_reg_b <= #1 mem[addr_b];`
431			`else if (ce_b && we_b)`
432			`mem[addr_b] <= #1 di_b;`
433			`endif
434
435			`// synopsys translate_off`
436			`initial`
437			`begin`
438			`if (dw !== 40)`
439			`begin`
440			`$display("RAM instantiation error! Expected RAM width %d, actual %h!", 40, dw) ;`
441			`$finish ;`
442			`end`
443			`ifdef XILINX_RAMB4
444			`if (aw !== 8)`
445			`begin`
446			`$display("RAM instantiation error! Expected RAM address width %d, actual %h!", 40, aw) ;`
447			`$finish ;`
448			`end`
449			`endif
450			`// currenlty only artisan ram of depth 256 is supported - they don't provide generic ram models`
451			`ifdef ARTISAN_SDP
452			`if (aw !== 8)`
453			`begin`
454			`$display("RAM instantiation error! Expected RAM address width %d, actual %h!", 40, aw) ;`
455			`$finish ;`
456			`end`
457			`endif
458			`end`
459			`// synopsys translate_on`
460
461			`endmodule`