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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 1.3  2003/04/07 01:19:07  lampret
// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
//
// Revision 1.2  2002/10/17 20:04:41  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 1.7  2001/11/02 18:57:14  lampret
// Modified virtual silicon instantiations.
//
// Revision 1.6  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 1.5  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_64x22(
`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, do
);
 
//
// Default address and data buses width
//
parameter aw = 6;
parameter dw = 22;
 
`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] do;     // output data bus
 
//
// Internal wires and registers
//
wire    [9:0]            unconnected;
 
`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_hssp_64x22 #(dw, 1<<aw, aw) artisan_ssp(
`else
`ifdef OR1200_BIST
art_hssp_64x22_bist artisan_ssp(
`else
art_hssp_64x22 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(do)
);
 
`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),
        .do(do)
);
 
`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(do)
);
 
`else
 
`ifdef OR1200_VIRTUALSILICON_SSP
 
//
// Instantiation of ASIC memory:
//
// Virtual Silicon Single-Port Synchronous SRAM
//
`ifdef UNUSED
vs_hdsp_64x22 #(1<<aw, aw-1, dw-1) vs_ssp(
`else
`ifdef OR1200_BIST
vs_hdsp_64x22_bist vs_ssp(
`else
vs_hdsp_64x22 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(do)
);
 
`else
 
`ifdef OR1200_XILINX_RAMB4
 
//
// Instantiation of FPGA memory:
//
// Virtex/Spartan2
//
 
//
// Block 0
//
RAMB4_S16 ramb4_s16_0(
        .CLK(clk),
        .RST(rst),
        .ADDR({2'b00, addr}),
        .DI(di[15:0]),
        .EN(ce),
        .WE(we),
        .DO(do[15:0])
);
 
//
// Block 1
//
RAMB4_S16 ramb4_s16_1(
        .CLK(clk),
        .RST(rst),
        .ADDR({2'b00, addr}),
        .DI({unconnected, di[21:16]}),
        .EN(ce),
        .WE(we),
        .DO({unconnected, do[21:16]})
);
 
`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(do)
);
 
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     [dw-1:0] do_reg;                 // RAM data output register
 
//
// Data output drivers
//
assign do = (oe) ? do_reg : {dw{1'b0}};
 
//
// RAM read and write
//
always @(posedge clk)
        if (ce && !we)
                do_reg <= #1 mem[addr];
        else 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

Line No.	Rev	Author	Line
1	504	lampret	`//////////////////////////////////////////////////////////////////////`
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	1129	lampret	`//// - Altera LPM ////`
27	504	lampret	`//// ////`
28			`//// To Do: ////`
29			`//// - xilinx rams need external tri-state logic ////`
30			`//// - fix avant! two-port ram ////`
31	1129	lampret	`//// - add additional RAMs ////`
32	504	lampret	`//// ////`
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	1214	simons	`// Revision 1.3 2003/04/07 01:19:07 lampret`
67			`// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.`
68			`//`
69	1129	lampret	`// Revision 1.2 2002/10/17 20:04:41 lampret`
70			`// Added BIST scan. Special VS RAMs need to be used to implement BIST.`
71			`//`
72	1063	lampret	`// Revision 1.1 2002/01/03 08:16:15 lampret`
73			`// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.`
74			`//`
75	504	lampret	`// Revision 1.7 2001/11/02 18:57:14 lampret`
76			`// Modified virtual silicon instantiations.`
77			`//`
78			`// Revision 1.6 2001/10/21 17:57:16 lampret`
79			`// 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.`
80			`//`
81			`// Revision 1.5 2001/10/14 13:12:09 lampret`
82			`// MP3 version.`
83			`//`
84			`// Revision 1.1.1.1 2001/10/06 10:18:36 igorm`
85			`// no message`
86			`//`
87			`// Revision 1.1 2001/08/09 13:39:33 lampret`
88			`// Major clean-up.`
89			`//`
90			`// Revision 1.2 2001/07/30 05:38:02 lampret`
91			`// Adding empty directories required by HDL coding guidelines`
92			`//`
93			`//`
94
95			`// synopsys translate_off`
96			`include "timescale.v"
97			`// synopsys translate_on`
98			`include "or1200_defines.v"
99
100			`module or1200_spram_64x22(`
101	1063	lampret	`ifdef OR1200_BIST
102			`// RAM BIST`
103	1214	simons	`mbist_si_i, mbist_so_o, mbist_ctrl_i,`
104	1063	lampret	`endif
105	504	lampret	`// Generic synchronous single-port RAM interface`
106			`clk, rst, ce, we, oe, addr, di, do`
107			`);`
108
109			`//`
110			`// Default address and data buses width`
111			`//`
112			`parameter aw = 6;`
113			`parameter dw = 22;`
114
115	1063	lampret	`ifdef OR1200_BIST
116	504	lampret	`//`
117	1063	lampret	`// RAM BIST`
118			`//`
119	1214	simons	`input mbist_si_i;`
120			input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
121			`output mbist_so_o;`
122	1063	lampret	`endif
123
124			`//`
125	504	lampret	`// Generic synchronous single-port RAM interface`
126			`//`
127			`input clk; // Clock`
128			`input rst; // Reset`
129			`input ce; // Chip enable input`
130			`input we; // Write enable input`
131			`input oe; // Output enable input`
132			`input [aw-1:0] addr; // address bus inputs`
133			`input [dw-1:0] di; // input data bus`
134			`output [dw-1:0] do; // output data bus`
135
136			`//`
137			`// Internal wires and registers`
138			`//`
139			`wire [9:0] unconnected;`
140
141	1214	simons	`ifdef OR1200_ARTISAN_SSP
142			`else
143	1063	lampret	`ifdef OR1200_VIRTUALSILICON_SSP
144			`else
145			`ifdef OR1200_BIST
146	1214	simons	`assign mbist_so_o = mbist_si_i;`
147	1063	lampret	`endif
148			`endif
149	1214	simons	`endif
150	1063	lampret
151	504	lampret	`ifdef OR1200_ARTISAN_SSP
152
153			`//`
154			`// Instantiation of ASIC memory:`
155			`//`
156			`// Artisan Synchronous Single-Port RAM (ra1sh)`
157			`//`
158			`ifdef UNUSED
159			`art_hssp_64x22 #(dw, 1<<aw, aw) artisan_ssp(`
160			`else
161	1214	simons	`ifdef OR1200_BIST
162			`art_hssp_64x22_bist artisan_ssp(`
163			`else
164	504	lampret	`art_hssp_64x22 artisan_ssp(`
165			`endif
166	1214	simons	`endif
167			`ifdef OR1200_BIST
168			`// RAM BIST`
169			`.mbist_si_i(mbist_si_i),`
170			`.mbist_so_o(mbist_so_o),`
171			`.mbist_ctrl_i(mbist_ctrl_i),`
172			`endif
173			`.CLK(clk),`
174			`.CEN(~ce),`
175			`.WEN(~we),`
176			`.A(addr),`
177			`.D(di),`
178			`.OEN(~oe),`
179			`.Q(do)`
180	504	lampret	`);`
181
182			`else
183
184			`ifdef OR1200_AVANT_ATP
185
186			`//`
187			`// Instantiation of ASIC memory:`
188			`//`
189			`// Avant! Asynchronous Two-Port RAM`
190			`//`
191			`avant_atp avant_atp(`
192			`.web(~we),`
193			`.reb(),`
194			`.oeb(~oe),`
195			`.rcsb(),`
196			`.wcsb(),`
197			`.ra(addr),`
198			`.wa(addr),`
199			`.di(di),`
200			`.do(do)`
201			`);`
202
203			`else
204
205			`ifdef OR1200_VIRAGE_SSP
206
207			`//`
208			`// Instantiation of ASIC memory:`
209			`//`
210			`// Virage Synchronous 1-port R/W RAM`
211			`//`
212			`virage_ssp virage_ssp(`
213			`.clk(clk),`
214			`.adr(addr),`
215			`.d(di),`
216			`.we(we),`
217			`.oe(oe),`
218			`.me(ce),`
219			`.q(do)`
220			`);`
221
222			`else
223
224			`ifdef OR1200_VIRTUALSILICON_SSP
225
226			`//`
227			`// Instantiation of ASIC memory:`
228			`//`
229			`// Virtual Silicon Single-Port Synchronous SRAM`
230			`//`
231			`ifdef UNUSED
232			`vs_hdsp_64x22 #(1<<aw, aw-1, dw-1) vs_ssp(`
233			`else
234	1063	lampret	`ifdef OR1200_BIST
235			`vs_hdsp_64x22_bist vs_ssp(`
236			`else
237	504	lampret	`vs_hdsp_64x22 vs_ssp(`
238			`endif
239	1063	lampret	`endif
240			`ifdef OR1200_BIST
241			`// RAM BIST`
242	1214	simons	`.mbist_si_i(mbist_si_i),`
243			`.mbist_so_o(mbist_so_o),`
244			`.mbist_ctrl_i(mbist_ctrl_i),`
245	1063	lampret	`endif
246	504	lampret	`.CK(clk),`
247			`.ADR(addr),`
248			`.DI(di),`
249			`.WEN(~we),`
250			`.CEN(~ce),`
251			`.OEN(~oe),`
252			`.DOUT(do)`
253			`);`
254
255			`else
256
257			`ifdef OR1200_XILINX_RAMB4
258
259			`//`
260			`// Instantiation of FPGA memory:`
261			`//`
262			`// Virtex/Spartan2`
263			`//`
264
265			`//`
266			`// Block 0`
267			`//`
268			`RAMB4_S16 ramb4_s16_0(`
269			`.CLK(clk),`
270			`.RST(rst),`
271			`.ADDR({2'b00, addr}),`
272			`.DI(di[15:0]),`
273			`.EN(ce),`
274			`.WE(we),`
275			`.DO(do[15:0])`
276			`);`
277
278			`//`
279			`// Block 1`
280			`//`
281			`RAMB4_S16 ramb4_s16_1(`
282			`.CLK(clk),`
283			`.RST(rst),`
284			`.ADDR({2'b00, addr}),`
285			`.DI({unconnected, di[21:16]}),`
286			`.EN(ce),`
287			`.WE(we),`
288			`.DO({unconnected, do[21:16]})`
289			`);`
290
291			`else
292
293	1129	lampret	`ifdef OR1200_ALTERA_LPM
294
295	504	lampret	`//`
296	1129	lampret	`// Instantiation of FPGA memory:`
297			`//`
298			`// Altera LPM`
299			`//`
300			`// Added By Jamil Khatib`
301			`//`
302
303			`wire wr;`
304
305			`assign wr = ce & we;`
306
307			`initial $display("Using Altera LPM.");`
308
309			`lpm_ram_dq lpm_ram_dq_component (`
310			`.address(addr),`
311			`.inclock(clk),`
312			`.outclock(clk),`
313			`.data(di),`
314			`.we(wr),`
315			`.q(do)`
316			`);`
317
318			`defparam lpm_ram_dq_component.lpm_width = dw,`
319			`lpm_ram_dq_component.lpm_widthad = aw,`
320			`lpm_ram_dq_component.lpm_indata = "REGISTERED",`
321			`lpm_ram_dq_component.lpm_address_control = "REGISTERED",`
322			`lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",`
323			`lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";`
324			`// examplar attribute lpm_ram_dq_component NOOPT TRUE`
325
326			`else
327
328			`//`
329	504	lampret	`// Generic single-port synchronous RAM model`
330			`//`
331
332			`//`
333			`// Generic RAM's registers and wires`
334			`//`
335			`reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content`
336			`reg [dw-1:0] do_reg; // RAM data output register`
337
338			`//`
339			`// Data output drivers`
340			`//`
341	1129	lampret	`assign do = (oe) ? do_reg : {dw{1'b0}};`
342	504	lampret
343			`//`
344			`// RAM read and write`
345			`//`
346			`always @(posedge clk)`
347			`if (ce && !we)`
348			`do_reg <= #1 mem[addr];`
349			`else if (ce && we)`
350			`mem[addr] <= #1 di;`
351
352	1129	lampret	`endif // !OR1200_ALTERA_LPM
353	504	lampret	`endif // !OR1200_XILINX_RAMB4_S16
354			`endif // !OR1200_VIRTUALSILICON_SSP
355			`endif // !OR1200_VIRAGE_SSP
356			`endif // !OR1200_AVANT_ATP
357			`endif // !OR1200_ARTISAN_SSP
358
359			`endmodule`

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