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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  Generic Single-Port Synchronous RAM                         ////
////                                                              ////
////  This file is part of memory library available from          ////
////  http://www.opencores.org/cvsweb.shtml/generic_memories/     ////
////                                                              ////
////  Description                                                 ////
////  This block is a wrapper with common single-port             ////
////  synchronous memory interface for different                  ////
////  types of ASIC and FPGA RAMs. Beside universal memory        ////
////  interface it also provides behavioral model of generic      ////
////  single-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 Single-Port Sync RAM                              ////
////  - Avant! Two-Port Sync RAM (*)                              ////
////  - Virage Single-Port Sync RAM                               ////
////  - Virtual Silicon Single-Port Sync RAM                      ////
////                                                              ////
////  Supported FPGA RAMs are:                                    ////
////  - Xilinx Virtex RAMB4_S16                                   ////
////  - Altera LPM                                                ////
////                                                              ////
////  To Do:                                                      ////
////   - xilinx rams need external tri-state logic                ////
////   - fix avant! two-port ram                                  ////
////   - add additional RAMs                                      ////
////                                                              ////
////  Author(s):                                                  ////
////      - Damjan Lampret, lampret@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 1.9  2004/06/08 18:15:32  lampret
// Changed behavior of the simulation generic models
//
// Revision 1.8  2004/04/05 08:29:57  lampret
// Merged branch_qmem into main tree.
//
// Revision 1.4.4.1  2003/12/09 11:46:48  simons
// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.
//
// Revision 1.4  2003/04/07 01:19:07  lampret
// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
//
// Revision 1.3  2002/10/28 15:03:50  mohor
// Signal scanb_sen renamed to scanb_en.
//
// Revision 1.2  2002/10/17 20:04:40  lampret
// Added BIST scan. Special VS RAMs need to be used to implement BIST.
//
// Revision 1.1  2002/01/03 08:16:15  lampret
// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
//
// Revision 1.8  2001/11/02 18:57:14  lampret
// Modified virtual silicon instantiations.
//
// Revision 1.7  2001/10/21 17:57:16  lampret
// Removed params from generic_XX.v. Added translate_off/on in sprs.v and id.v. Removed spr_addr from dc.v and ic.v. Fixed CR+LF.
//
// Revision 1.6  2001/10/14 13:12:09  lampret
// MP3 version.
//
// Revision 1.1.1.1  2001/10/06 10:18:36  igorm
// no message
//
// Revision 1.1  2001/08/09 13:39:33  lampret
// Major clean-up.
//
// Revision 1.2  2001/07/30 05:38:02  lampret
// Adding empty directories required by HDL coding guidelines
//
//
 
// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
`include "or1200_defines.v"
 
module or1200_spram_2048x32(
`ifdef OR1200_BIST
        // RAM BIST
        mbist_si_i, mbist_so_o, mbist_ctrl_i,
`endif
        // Generic synchronous single-port RAM interface
        clk, rst, ce, we, oe, addr, di, doq
);
 
//
// Default address and data buses width
//
parameter aw = 11;
parameter dw = 32;
 
`ifdef OR1200_BIST
//
// RAM BIST
//
input mbist_si_i;
input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
output mbist_so_o;
`endif
 
//
// Generic synchronous single-port RAM interface
//
input                   clk;    // Clock
input                   rst;    // Reset
input                   ce;     // Chip enable input
input                   we;     // Write enable input
input                   oe;     // Output enable input
input   [aw-1:0] addr;   // address bus inputs
input   [dw-1:0] di;     // input data bus
output  [dw-1:0] doq;    // output data bus
 
//
// Internal wires and registers
//
 
`ifdef OR1200_ARTISAN_SSP
`else
`ifdef OR1200_VIRTUALSILICON_SSP
`else
`ifdef OR1200_BIST
assign mbist_so_o = mbist_si_i;
`endif
`endif
`endif
 
`ifdef OR1200_ARTISAN_SSP
 
//
// Instantiation of ASIC memory:
//
// Artisan Synchronous Single-Port RAM (ra1sh)
//
`ifdef UNUSED
art_hdsp_2048x32 #(dw, 1<<aw, aw) artisan_ssp(
`else
`ifdef OR1200_BIST
art_hssp_2048x32_bist artisan_ssp(
`else
art_hssp_2048x32 artisan_ssp(
`endif
`endif
`ifdef OR1200_BIST
        // RAM BIST
        .mbist_si_i(mbist_si_i),
        .mbist_so_o(mbist_so_o),
        .mbist_ctrl_i(mbist_ctrl_i),
`endif
        .CLK(clk),
        .CEN(~ce),
        .WEN(~we),
        .A(addr),
        .D(di),
        .OEN(~oe),
        .Q(doq)
);
 
`else
 
`ifdef OR1200_AVANT_ATP
 
//
// 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),
        .doq(doq)
);
 
`else
 
`ifdef OR1200_VIRAGE_SSP
 
//
// Instantiation of ASIC memory:
//
// Virage Synchronous 1-port R/W RAM
//
virage_ssp virage_ssp(
        .clk(clk),
        .adr(addr),
        .d(di),
        .we(we),
        .oe(oe),
        .me(ce),
        .q(doq)
);
 
`else
 
`ifdef OR1200_VIRTUALSILICON_SSP
 
//
// Instantiation of ASIC memory:
//
// Virtual Silicon Single-Port Synchronous SRAM
//
`ifdef UNUSED
vs_hdsp_2048x32 #(1<<aw, aw-1, dw-1) vs_ssp(
`else
`ifdef OR1200_BIST
vs_hdsp_2048x32_bist vs_ssp(
`else
vs_hdsp_2048x32 vs_ssp(
`endif
`endif
`ifdef OR1200_BIST
        // RAM BIST
        .mbist_si_i(mbist_si_i),
        .mbist_so_o(mbist_so_o),
        .mbist_ctrl_i(mbist_ctrl_i),
`endif
        .CK(clk),
        .ADR(addr),
        .DI(di),
        .WEN(~we),
        .CEN(~ce),
        .OEN(~oe),
        .DOUT(doq)
);
 
`else
 
`ifdef OR1200_XILINX_RAMB4
 
//
// Instantiation of FPGA memory:
//
// Virtex/Spartan2
//
 
//
// Block 0
//
RAMB4_S2 ramb4_s2_0(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[1:0]),
        .EN(ce),
        .WE(we),
        .DO(doq[1:0])
);
 
//
// Block 1
//
RAMB4_S2 ramb4_s2_1(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[3:2]),
        .EN(ce),
        .WE(we),
        .DO(doq[3:2])
);
 
//
// Block 2
//
RAMB4_S2 ramb4_s2_2(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[5:4]),
        .EN(ce),
        .WE(we),
        .DO(doq[5:4])
);
 
//
// Block 3
//
RAMB4_S2 ramb4_s2_3(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[7:6]),
        .EN(ce),
        .WE(we),
        .DO(doq[7:6])
);
 
//
// Block 4
//
RAMB4_S2 ramb4_s2_4(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[9:8]),
        .EN(ce),
        .WE(we),
        .DO(doq[9:8])
);
 
//
// Block 5
//
RAMB4_S2 ramb4_s2_5(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[11:10]),
        .EN(ce),
        .WE(we),
        .DO(doq[11:10])
);
 
//
// Block 6
//
RAMB4_S2 ramb4_s2_6(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[13:12]),
        .EN(ce),
        .WE(we),
        .DO(doq[13:12])
);
 
//
// Block 7
//
RAMB4_S2 ramb4_s2_7(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[15:14]),
        .EN(ce),
        .WE(we),
        .DO(doq[15:14])
);
 
//
// Block 8
//
RAMB4_S2 ramb4_s2_8(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[17:16]),
        .EN(ce),
        .WE(we),
        .DO(doq[17:16])
);
 
//
// Block 9
//
RAMB4_S2 ramb4_s2_9(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[19:18]),
        .EN(ce),
        .WE(we),
        .DO(doq[19:18])
);
 
//
// Block 10
//
RAMB4_S2 ramb4_s2_10(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[21:20]),
        .EN(ce),
        .WE(we),
        .DO(doq[21:20])
);
 
//
// Block 11
//
RAMB4_S2 ramb4_s2_11(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[23:22]),
        .EN(ce),
        .WE(we),
        .DO(doq[23:22])
);
 
//
// Block 12
//
RAMB4_S2 ramb4_s2_12(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[25:24]),
        .EN(ce),
        .WE(we),
        .DO(doq[25:24])
);
 
//
// Block 13
//
RAMB4_S2 ramb4_s2_13(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[27:26]),
        .EN(ce),
        .WE(we),
        .DO(doq[27:26])
);
 
//
// Block 14
//
RAMB4_S2 ramb4_s2_14(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[29:28]),
        .EN(ce),
        .WE(we),
        .DO(doq[29:28])
);
 
//
// Block 15
//
RAMB4_S2 ramb4_s2_15(
        .CLK(clk),
        .RST(rst),
        .ADDR(addr),
        .DI(di[31:30]),
        .EN(ce),
        .WE(we),
        .DO(doq[31:30])
);
 
`else
 
`ifdef OR1200_ALTERA_LPM
 
//
// Instantiation of FPGA memory:
//
// Altera LPM
//
// Added By Jamil Khatib
//
 
wire    wr;
 
assign  wr = ce & we;
 
initial $display("Using Altera LPM.");
 
lpm_ram_dq lpm_ram_dq_component (
        .address(addr),
        .inclock(clk),
        .outclock(clk),
        .data(di),
        .we(wr),
        .q(doq)
);
 
defparam lpm_ram_dq_component.lpm_width = dw,
        lpm_ram_dq_component.lpm_widthad = aw,
        lpm_ram_dq_component.lpm_indata = "REGISTERED",
        lpm_ram_dq_component.lpm_address_control = "REGISTERED",
        lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",
        lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";
        // examplar attribute lpm_ram_dq_component NOOPT TRUE
 
`else
 
//
// Generic single-port synchronous RAM model
//
 
//
// Generic RAM's registers and wires
//
reg     [dw-1:0] mem [(1<<aw)-1:0];       // RAM content
reg     [aw-1:0] addr_reg;               // RAM address register
 
//
// Data output drivers
//
assign doq = (oe) ? mem[addr_reg] : {dw{1'b0}};
 
//
// RAM address register
//
always @(posedge clk or posedge rst)
        if (rst)
                addr_reg <= #1 {aw{1'b0}};
        else if (ce)
                addr_reg <= #1 addr;
 
//
// RAM write
//
always @(posedge clk)
        if (ce && we)
                mem[addr] <= #1 di;
 
`endif  // !OR1200_ALTERA_LPM
`endif  // !OR1200_XILINX_RAMB4_S16
`endif  // !OR1200_VIRTUALSILICON_SSP
`endif  // !OR1200_VIRAGE_SSP
`endif  // !OR1200_AVANT_ATP
`endif  // !OR1200_ARTISAN_SSP
 
endmodule

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[/] [or1k/] [trunk/] [rc203soc/] [rtl/] [verilog/] [or1200/] [rtl/] [verilog/] [or1200_spram_2048x32.v] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1327	jcastillo	`//////////////////////////////////////////////////////////////////////`
2			`//// ////`
3			`//// Generic Single-Port Synchronous RAM ////`
4			`//// ////`
5			`//// This file is part of memory library available from ////`
6			`//// http://www.opencores.org/cvsweb.shtml/generic_memories/ ////`
7			`//// ////`
8			`//// Description ////`
9			`//// This block is a wrapper with common single-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			`//// single-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 Single-Port Sync RAM ////`
20			`//// - Avant! Two-Port Sync RAM (*) ////`
21			`//// - Virage Single-Port Sync RAM ////`
22			`//// - Virtual Silicon Single-Port Sync RAM ////`
23			`//// ////`
24			`//// Supported FPGA RAMs are: ////`
25			`//// - Xilinx Virtex RAMB4_S16 ////`
26			`//// - Altera LPM ////`
27			`//// ////`
28			`//// To Do: ////`
29			`//// - xilinx rams need external tri-state logic ////`
30			`//// - fix avant! two-port ram ////`
31			`//// - add additional RAMs ////`
32			`//// ////`
33			`//// Author(s): ////`
34			`//// - Damjan Lampret, lampret@opencores.org ////`
35			`//// ////`
36			`//////////////////////////////////////////////////////////////////////`
37			`//// ////`
38			`//// Copyright (C) 2000 Authors and OPENCORES.ORG ////`
39			`//// ////`
40			`//// This source file may be used and distributed without ////`
41			`//// restriction provided that this copyright statement is not ////`
42			`//// removed from the file and that any derivative work contains ////`
43			`//// the original copyright notice and the associated disclaimer. ////`
44			`//// ////`
45			`//// This source file is free software; you can redistribute it ////`
46			`//// and/or modify it under the terms of the GNU Lesser General ////`
47			`//// Public License as published by the Free Software Foundation; ////`
48			`//// either version 2.1 of the License, or (at your option) any ////`
49			`//// later version. ////`
50			`//// ////`
51			`//// This source is distributed in the hope that it will be ////`
52			`//// useful, but WITHOUT ANY WARRANTY; without even the implied ////`
53			`//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////`
54			`//// PURPOSE. See the GNU Lesser General Public License for more ////`
55			`//// details. ////`
56			`//// ////`
57			`//// You should have received a copy of the GNU Lesser General ////`
58			`//// Public License along with this source; if not, download it ////`
59			`//// from http://www.opencores.org/lgpl.shtml ////`
60			`//// ////`
61			`//////////////////////////////////////////////////////////////////////`
62			`//`
63			`// CVS Revision History`
64			`//`
65			`// $Log: not supported by cvs2svn $`
66			`// Revision 1.9 2004/06/08 18:15:32 lampret`
67			`// Changed behavior of the simulation generic models`
68			`//`
69			`// Revision 1.8 2004/04/05 08:29:57 lampret`
70			`// Merged branch_qmem into main tree.`
71			`//`
72			`// Revision 1.4.4.1 2003/12/09 11:46:48 simons`
73			`// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.`
74			`//`
75			`// Revision 1.4 2003/04/07 01:19:07 lampret`
76			`// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.`
77			`//`
78			`// Revision 1.3 2002/10/28 15:03:50 mohor`
79			`// Signal scanb_sen renamed to scanb_en.`
80			`//`
81			`// Revision 1.2 2002/10/17 20:04:40 lampret`
82			`// Added BIST scan. Special VS RAMs need to be used to implement BIST.`
83			`//`
84			`// Revision 1.1 2002/01/03 08:16:15 lampret`
85			`// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.`
86			`//`
87			`// Revision 1.8 2001/11/02 18:57:14 lampret`
88			`// Modified virtual silicon instantiations.`
89			`//`
90			`// Revision 1.7 2001/10/21 17:57:16 lampret`
91			`// Removed params from generic_XX.v. Added translate_off/on in sprs.v and id.v. Removed spr_addr from dc.v and ic.v. Fixed CR+LF.`
92			`//`
93			`// Revision 1.6 2001/10/14 13:12:09 lampret`
94			`// MP3 version.`
95			`//`
96			`// Revision 1.1.1.1 2001/10/06 10:18:36 igorm`
97			`// no message`
98			`//`
99			`// Revision 1.1 2001/08/09 13:39:33 lampret`
100			`// Major clean-up.`
101			`//`
102			`// Revision 1.2 2001/07/30 05:38:02 lampret`
103			`// Adding empty directories required by HDL coding guidelines`
104			`//`
105			`//`
106
107			`// synopsys translate_off`
108			`include "timescale.v"
109			`// synopsys translate_on`
110			`include "or1200_defines.v"
111
112			`module or1200_spram_2048x32(`
113			`ifdef OR1200_BIST
114			`// RAM BIST`
115			`mbist_si_i, mbist_so_o, mbist_ctrl_i,`
116			`endif
117			`// Generic synchronous single-port RAM interface`
118			`clk, rst, ce, we, oe, addr, di, doq`
119			`);`
120
121			`//`
122			`// Default address and data buses width`
123			`//`
124			`parameter aw = 11;`
125			`parameter dw = 32;`
126
127			`ifdef OR1200_BIST
128			`//`
129			`// RAM BIST`
130			`//`
131			`input mbist_si_i;`
132			input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
133			`output mbist_so_o;`
134			`endif
135
136			`//`
137			`// Generic synchronous single-port RAM interface`
138			`//`
139			`input clk; // Clock`
140			`input rst; // Reset`
141			`input ce; // Chip enable input`
142			`input we; // Write enable input`
143			`input oe; // Output enable input`
144			`input [aw-1:0] addr; // address bus inputs`
145			`input [dw-1:0] di; // input data bus`
146			`output [dw-1:0] doq; // output data bus`
147
148			`//`
149			`// Internal wires and registers`
150			`//`
151
152			`ifdef OR1200_ARTISAN_SSP
153			`else
154			`ifdef OR1200_VIRTUALSILICON_SSP
155			`else
156			`ifdef OR1200_BIST
157			`assign mbist_so_o = mbist_si_i;`
158			`endif
159			`endif
160			`endif
161
162			`ifdef OR1200_ARTISAN_SSP
163
164			`//`
165			`// Instantiation of ASIC memory:`
166			`//`
167			`// Artisan Synchronous Single-Port RAM (ra1sh)`
168			`//`
169			`ifdef UNUSED
170			`art_hdsp_2048x32 #(dw, 1<<aw, aw) artisan_ssp(`
171			`else
172			`ifdef OR1200_BIST
173			`art_hssp_2048x32_bist artisan_ssp(`
174			`else
175			`art_hssp_2048x32 artisan_ssp(`
176			`endif
177			`endif
178			`ifdef OR1200_BIST
179			`// RAM BIST`
180			`.mbist_si_i(mbist_si_i),`
181			`.mbist_so_o(mbist_so_o),`
182			`.mbist_ctrl_i(mbist_ctrl_i),`
183			`endif
184			`.CLK(clk),`
185			`.CEN(~ce),`
186			`.WEN(~we),`
187			`.A(addr),`
188			`.D(di),`
189			`.OEN(~oe),`
190			`.Q(doq)`
191			`);`
192
193			`else
194
195			`ifdef OR1200_AVANT_ATP
196
197			`//`
198			`// Instantiation of ASIC memory:`
199			`//`
200			`// Avant! Asynchronous Two-Port RAM`
201			`//`
202			`avant_atp avant_atp(`
203			`.web(~we),`
204			`.reb(),`
205			`.oeb(~oe),`
206			`.rcsb(),`
207			`.wcsb(),`
208			`.ra(addr),`
209			`.wa(addr),`
210			`.di(di),`
211			`.doq(doq)`
212			`);`
213
214			`else
215
216			`ifdef OR1200_VIRAGE_SSP
217
218			`//`
219			`// Instantiation of ASIC memory:`
220			`//`
221			`// Virage Synchronous 1-port R/W RAM`
222			`//`
223			`virage_ssp virage_ssp(`
224			`.clk(clk),`
225			`.adr(addr),`
226			`.d(di),`
227			`.we(we),`
228			`.oe(oe),`
229			`.me(ce),`
230			`.q(doq)`
231			`);`
232
233			`else
234
235			`ifdef OR1200_VIRTUALSILICON_SSP
236
237			`//`
238			`// Instantiation of ASIC memory:`
239			`//`
240			`// Virtual Silicon Single-Port Synchronous SRAM`
241			`//`
242			`ifdef UNUSED
243			`vs_hdsp_2048x32 #(1<<aw, aw-1, dw-1) vs_ssp(`
244			`else
245			`ifdef OR1200_BIST
246			`vs_hdsp_2048x32_bist vs_ssp(`
247			`else
248			`vs_hdsp_2048x32 vs_ssp(`
249			`endif
250			`endif
251			`ifdef OR1200_BIST
252			`// RAM BIST`
253			`.mbist_si_i(mbist_si_i),`
254			`.mbist_so_o(mbist_so_o),`
255			`.mbist_ctrl_i(mbist_ctrl_i),`
256			`endif
257			`.CK(clk),`
258			`.ADR(addr),`
259			`.DI(di),`
260			`.WEN(~we),`
261			`.CEN(~ce),`
262			`.OEN(~oe),`
263			`.DOUT(doq)`
264			`);`
265
266			`else
267
268			`ifdef OR1200_XILINX_RAMB4
269
270			`//`
271			`// Instantiation of FPGA memory:`
272			`//`
273			`// Virtex/Spartan2`
274			`//`
275
276			`//`
277			`// Block 0`
278			`//`
279			`RAMB4_S2 ramb4_s2_0(`
280			`.CLK(clk),`
281			`.RST(rst),`
282			`.ADDR(addr),`
283			`.DI(di[1:0]),`
284			`.EN(ce),`
285			`.WE(we),`
286			`.DO(doq[1:0])`
287			`);`
288
289			`//`
290			`// Block 1`
291			`//`
292			`RAMB4_S2 ramb4_s2_1(`
293			`.CLK(clk),`
294			`.RST(rst),`
295			`.ADDR(addr),`
296			`.DI(di[3:2]),`
297			`.EN(ce),`
298			`.WE(we),`
299			`.DO(doq[3:2])`
300			`);`
301
302			`//`
303			`// Block 2`
304			`//`
305			`RAMB4_S2 ramb4_s2_2(`
306			`.CLK(clk),`
307			`.RST(rst),`
308			`.ADDR(addr),`
309			`.DI(di[5:4]),`
310			`.EN(ce),`
311			`.WE(we),`
312			`.DO(doq[5:4])`
313			`);`
314
315			`//`
316			`// Block 3`
317			`//`
318			`RAMB4_S2 ramb4_s2_3(`
319			`.CLK(clk),`
320			`.RST(rst),`
321			`.ADDR(addr),`
322			`.DI(di[7:6]),`
323			`.EN(ce),`
324			`.WE(we),`
325			`.DO(doq[7:6])`
326			`);`
327
328			`//`
329			`// Block 4`
330			`//`
331			`RAMB4_S2 ramb4_s2_4(`
332			`.CLK(clk),`
333			`.RST(rst),`
334			`.ADDR(addr),`
335			`.DI(di[9:8]),`
336			`.EN(ce),`
337			`.WE(we),`
338			`.DO(doq[9:8])`
339			`);`
340
341			`//`
342			`// Block 5`
343			`//`
344			`RAMB4_S2 ramb4_s2_5(`
345			`.CLK(clk),`
346			`.RST(rst),`
347			`.ADDR(addr),`
348			`.DI(di[11:10]),`
349			`.EN(ce),`
350			`.WE(we),`
351			`.DO(doq[11:10])`
352			`);`
353
354			`//`
355			`// Block 6`
356			`//`
357			`RAMB4_S2 ramb4_s2_6(`
358			`.CLK(clk),`
359			`.RST(rst),`
360			`.ADDR(addr),`
361			`.DI(di[13:12]),`
362			`.EN(ce),`
363			`.WE(we),`
364			`.DO(doq[13:12])`
365			`);`
366
367			`//`
368			`// Block 7`
369			`//`
370			`RAMB4_S2 ramb4_s2_7(`
371			`.CLK(clk),`
372			`.RST(rst),`
373			`.ADDR(addr),`
374			`.DI(di[15:14]),`
375			`.EN(ce),`
376			`.WE(we),`
377			`.DO(doq[15:14])`
378			`);`
379
380			`//`
381			`// Block 8`
382			`//`
383			`RAMB4_S2 ramb4_s2_8(`
384			`.CLK(clk),`
385			`.RST(rst),`
386			`.ADDR(addr),`
387			`.DI(di[17:16]),`
388			`.EN(ce),`
389			`.WE(we),`
390			`.DO(doq[17:16])`
391			`);`
392
393			`//`
394			`// Block 9`
395			`//`
396			`RAMB4_S2 ramb4_s2_9(`
397			`.CLK(clk),`
398			`.RST(rst),`
399			`.ADDR(addr),`
400			`.DI(di[19:18]),`
401			`.EN(ce),`
402			`.WE(we),`
403			`.DO(doq[19:18])`
404			`);`
405
406			`//`
407			`// Block 10`
408			`//`
409			`RAMB4_S2 ramb4_s2_10(`
410			`.CLK(clk),`
411			`.RST(rst),`
412			`.ADDR(addr),`
413			`.DI(di[21:20]),`
414			`.EN(ce),`
415			`.WE(we),`
416			`.DO(doq[21:20])`
417			`);`
418
419			`//`
420			`// Block 11`
421			`//`
422			`RAMB4_S2 ramb4_s2_11(`
423			`.CLK(clk),`
424			`.RST(rst),`
425			`.ADDR(addr),`
426			`.DI(di[23:22]),`
427			`.EN(ce),`
428			`.WE(we),`
429			`.DO(doq[23:22])`
430			`);`
431
432			`//`
433			`// Block 12`
434			`//`
435			`RAMB4_S2 ramb4_s2_12(`
436			`.CLK(clk),`
437			`.RST(rst),`
438			`.ADDR(addr),`
439			`.DI(di[25:24]),`
440			`.EN(ce),`
441			`.WE(we),`
442			`.DO(doq[25:24])`
443			`);`
444
445			`//`
446			`// Block 13`
447			`//`
448			`RAMB4_S2 ramb4_s2_13(`
449			`.CLK(clk),`
450			`.RST(rst),`
451			`.ADDR(addr),`
452			`.DI(di[27:26]),`
453			`.EN(ce),`
454			`.WE(we),`
455			`.DO(doq[27:26])`
456			`);`
457
458			`//`
459			`// Block 14`
460			`//`
461			`RAMB4_S2 ramb4_s2_14(`
462			`.CLK(clk),`
463			`.RST(rst),`
464			`.ADDR(addr),`
465			`.DI(di[29:28]),`
466			`.EN(ce),`
467			`.WE(we),`
468			`.DO(doq[29:28])`
469			`);`
470
471			`//`
472			`// Block 15`
473			`//`
474			`RAMB4_S2 ramb4_s2_15(`
475			`.CLK(clk),`
476			`.RST(rst),`
477			`.ADDR(addr),`
478			`.DI(di[31:30]),`
479			`.EN(ce),`
480			`.WE(we),`
481			`.DO(doq[31:30])`
482			`);`
483
484			`else
485
486			`ifdef OR1200_ALTERA_LPM
487
488			`//`
489			`// Instantiation of FPGA memory:`
490			`//`
491			`// Altera LPM`
492			`//`
493			`// Added By Jamil Khatib`
494			`//`
495
496			`wire wr;`
497
498			`assign wr = ce & we;`
499
500			`initial $display("Using Altera LPM.");`
501
502			`lpm_ram_dq lpm_ram_dq_component (`
503			`.address(addr),`
504			`.inclock(clk),`
505			`.outclock(clk),`
506			`.data(di),`
507			`.we(wr),`
508			`.q(doq)`
509			`);`
510
511			`defparam lpm_ram_dq_component.lpm_width = dw,`
512			`lpm_ram_dq_component.lpm_widthad = aw,`
513			`lpm_ram_dq_component.lpm_indata = "REGISTERED",`
514			`lpm_ram_dq_component.lpm_address_control = "REGISTERED",`
515			`lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",`
516			`lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";`
517			`// examplar attribute lpm_ram_dq_component NOOPT TRUE`
518
519			`else
520
521			`//`
522			`// Generic single-port synchronous RAM model`
523			`//`
524
525			`//`
526			`// Generic RAM's registers and wires`
527			`//`
528			`reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content`
529			`reg [aw-1:0] addr_reg; // RAM address register`
530
531			`//`
532			`// Data output drivers`
533			`//`
534			`assign doq = (oe) ? mem[addr_reg] : {dw{1'b0}};`
535
536			`//`
537			`// RAM address register`
538			`//`
539			`always @(posedge clk or posedge rst)`
540			`if (rst)`
541			`addr_reg <= #1 {aw{1'b0}};`
542			`else if (ce)`
543			`addr_reg <= #1 addr;`
544
545			`//`
546			`// RAM write`
547			`//`
548			`always @(posedge clk)`
549			`if (ce && we)`
550			`mem[addr] <= #1 di;`
551
552			`endif // !OR1200_ALTERA_LPM
553			`endif // !OR1200_XILINX_RAMB4_S16
554			`endif // !OR1200_VIRTUALSILICON_SSP
555			`endif // !OR1200_VIRAGE_SSP
556			`endif // !OR1200_AVANT_ATP
557			`endif // !OR1200_ARTISAN_SSP
558
559			`endmodule`