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[/] [openrisc/] [trunk/] [orpsocv2/] [rtl/] [verilog/] [or1200/] [or1200_spram_512x20.v] - Blame information for rev 751

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Line No. Rev Author Line
1 350 julius
//////////////////////////////////////////////////////////////////////
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////                                                              ////
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////  Generic Single-Port Synchronous RAM                         ////
4
////                                                              ////
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////  This file is part of memory library available from          ////
6
////  http://www.opencores.org/cvsweb.shtml/generic_memories/     ////
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////                                                              ////
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////  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.                                ////
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////  It should be used in all OPENCORES designs that want to be  ////
15
////  portable accross different target technologies and          ////
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////  independent of target memory.                               ////
17
////                                                              ////
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////  Supported ASIC RAMs are:                                    ////
19
////  - Artisan Single-Port Sync RAM                              ////
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////  - Avant! Two-Port Sync RAM (*)                              ////
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////  - Virage Single-Port Sync RAM                               ////
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////  - Virtual Silicon Single-Port Sync RAM                      ////
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////                                                              ////
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////  Supported FPGA RAMs are:                                    ////
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////  - Xilinx Virtex RAMB16                                      ////
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////  - Xilinx Virtex RAMB4                                       ////
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////  - Altera LPM                                                ////
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////                                                              ////
29
////  To Do:                                                      ////
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////   - xilinx rams need external tri-state logic                ////
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////   - fix avant! two-port ram                                  ////
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////   - add additional RAMs                                      ////
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////                                                              ////
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////  Author(s):                                                  ////
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////      - Damjan Lampret, lampret@opencores.org                 ////
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////                                                              ////
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//////////////////////////////////////////////////////////////////////
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////                                                              ////
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//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
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////                                                              ////
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//// This source file may be used and distributed without         ////
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//// restriction provided that this copyright statement is not    ////
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//// removed from the file and that any derivative work contains  ////
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//// the original copyright notice and the associated disclaimer. ////
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////                                                              ////
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//// This source file is free software; you can redistribute it   ////
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//// and/or modify it under the terms of the GNU Lesser General   ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any   ////
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//// later version.                                               ////
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////                                                              ////
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//// This source is distributed in the hope that it will be       ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
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//// PURPOSE.  See the GNU Lesser General Public License for more ////
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//// details.                                                     ////
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////                                                              ////
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//// You should have received a copy of the GNU Lesser General    ////
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//// Public License along with this source; if not, download it   ////
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//// from http://www.opencores.org/lgpl.shtml                     ////
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////                                                              ////
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//////////////////////////////////////////////////////////////////////
63
//
64
// CVS Revision History
65
//
66
// $Log: or1200_spram_512x20.v,v $
67
// Revision 2.0  2010/06/30 11:00:00  ORSoC
68
// Minor update: 
69
// Coding style changed.
70
//
71
// Revision 1.9  2005/10/19 11:37:56  jcastillo
72
// Added support for RAMB16 Xilinx4/Spartan3 primitives
73
//
74
// Revision 1.8  2004/06/08 18:15:32  lampret
75
// Changed behavior of the simulation generic models
76
//
77
// Revision 1.7  2004/04/05 08:29:57  lampret
78
// Merged branch_qmem into main tree.
79
//
80
// Revision 1.3.4.1  2003/12/09 11:46:48  simons
81
// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.
82
//
83
// Revision 1.3  2003/04/07 01:19:07  lampret
84
// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
85
//
86
// Revision 1.2  2002/10/17 20:04:40  lampret
87
// Added BIST scan. Special VS RAMs need to be used to implement BIST.
88
//
89
// Revision 1.1  2002/01/03 08:16:15  lampret
90
// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
91
//
92
// Revision 1.10  2001/11/27 21:24:04  lampret
93
// Changed instantiation name of VS RAMs.
94
//
95
// Revision 1.9  2001/11/27 19:45:04  lampret
96
// Fixed VS RAM instantiation - again.
97
//
98
// Revision 1.8  2001/11/23 21:42:31  simons
99
// Program counter divided to PPC and NPC.
100
//
101
// Revision 1.6  2001/10/21 17:57:16  lampret
102
// 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.
103
//
104
// Revision 1.5  2001/10/14 13:12:09  lampret
105
// MP3 version.
106
//
107
// Revision 1.1.1.1  2001/10/06 10:18:36  igorm
108
// no message
109
//
110
// Revision 1.1  2001/08/09 13:39:33  lampret
111
// Major clean-up.
112
//
113
// Revision 1.2  2001/07/30 05:38:02  lampret
114
// Adding empty directories required by HDL coding guidelines
115
//
116
//
117
 
118
// synopsys translate_off
119
`include "timescale.v"
120
// synopsys translate_on
121
`include "or1200_defines.v"
122
 
123
module or1200_spram_512x20(
124
`ifdef OR1200_BIST
125
        // RAM BIST
126
        mbist_si_i, mbist_so_o, mbist_ctrl_i,
127
`endif
128
        // Generic synchronous single-port RAM interface
129
        clk, rst, ce, we, oe, addr, di, doq
130
);
131
 
132
//
133
// Default address and data buses width
134
//
135
parameter aw = 9;
136
parameter dw = 20;
137
 
138
`ifdef OR1200_BIST
139
//
140
// RAM BIST
141
//
142
input mbist_si_i;
143
input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
144
output mbist_so_o;
145
`endif
146
 
147
//
148
// Generic synchronous single-port RAM interface
149
//
150
input                   clk;    // Clock
151
input                   rst;    // Reset
152
input                   ce;     // Chip enable input
153
input                   we;     // Write enable input
154
input                   oe;     // Output enable input
155
input   [aw-1:0] addr;   // address bus inputs
156
input   [dw-1:0] di;     // input data bus
157
output  [dw-1:0] doq;    // output data bus
158
 
159
//
160
// Internal wires and registers
161
//
162
`ifdef OR1200_XILINX_RAMB4
163
wire    [3:0]            unconnected;
164
`else
165
`ifdef OR1200_XILINX_RAMB16
166
wire    [11:0]           unconnected;
167
`endif // !OR1200_XILINX_RAMB16
168
`endif // !OR1200_XILINX_RAMB4
169
 
170
`ifdef OR1200_ARTISAN_SSP
171
`else
172
`ifdef OR1200_VIRTUALSILICON_SSP
173
`else
174
`ifdef OR1200_BIST
175
assign mbist_so_o = mbist_si_i;
176
`endif
177
`endif
178
`endif
179
 
180
`ifdef OR1200_ARTISAN_SSP
181
 
182
//
183
// Instantiation of ASIC memory:
184
//
185
// Artisan Synchronous Single-Port RAM (ra1sh)
186
//
187
`ifdef UNUSED
188
art_hssp_512x20 #(dw, 1<<aw, aw) artisan_ssp(
189
`else
190
`ifdef OR1200_BIST
191
art_hssp_512x20_bist artisan_ssp(
192
`else
193
art_hssp_512x20 artisan_ssp(
194
`endif
195
`endif
196
`ifdef OR1200_BIST
197
        // RAM BIST
198
        .mbist_si_i(mbist_si_i),
199
        .mbist_so_o(mbist_so_o),
200
        .mbist_ctrl_i(mbist_ctrl_i),
201
`endif
202
        .CLK(clk),
203
        .CEN(~ce),
204
        .WEN(~we),
205
        .A(addr),
206
        .D(di),
207
        .OEN(~oe),
208
        .Q(doq)
209
);
210
 
211
`else
212
 
213
`ifdef OR1200_AVANT_ATP
214
 
215
//
216
// Instantiation of ASIC memory:
217
//
218
// Avant! Asynchronous Two-Port RAM
219
//
220
avant_atp avant_atp(
221
        .web(~we),
222
        .reb(),
223
        .oeb(~oe),
224
        .rcsb(),
225
        .wcsb(),
226
        .ra(addr),
227
        .wa(addr),
228
        .di(di),
229
        .doq(doq)
230
);
231
 
232
`else
233
 
234
`ifdef OR1200_VIRAGE_SSP
235
 
236
//
237
// Instantiation of ASIC memory:
238
//
239
// Virage Synchronous 1-port R/W RAM
240
//
241
virage_ssp virage_ssp(
242
        .clk(clk),
243
        .adr(addr),
244
        .d(di),
245
        .we(we),
246
        .oe(oe),
247
        .me(ce),
248
        .q(doq)
249
);
250
 
251
`else
252
 
253
`ifdef OR1200_VIRTUALSILICON_SSP
254
 
255
//
256
// Instantiation of ASIC memory:
257
//
258
// Virtual Silicon Single-Port Synchronous SRAM
259
//
260
`ifdef UNUSED
261
vs_hdsp_512x20 #(1<<aw, aw-1, dw-1) vs_ssp(
262
`else
263
`ifdef OR1200_BIST
264
vs_hdsp_512x20_bist vs_ssp(
265
`else
266
vs_hdsp_512x20 vs_ssp(
267
`endif
268
`endif
269
`ifdef OR1200_BIST
270
        // RAM BIST
271
        .mbist_si_i(mbist_si_i),
272
        .mbist_so_o(mbist_so_o),
273
        .mbist_ctrl_i(mbist_ctrl_i),
274
`endif
275
        .CK(clk),
276
        .ADR(addr),
277
        .DI(di),
278
        .WEN(~we),
279
        .CEN(~ce),
280
        .OEN(~oe),
281
        .DOUT(doq)
282
);
283
 
284
`else
285
 
286
`ifdef OR1200_XILINX_RAMB4
287
 
288
//
289
// Instantiation of FPGA memory:
290
//
291
// Virtex/Spartan2
292
//
293
 
294
//
295
// Block 0
296
//
297
RAMB4_S8 ramb4_s8_0(
298
        .CLK(clk),
299
        .RST(1'b0),
300
        .ADDR(addr),
301
        .DI(di[7:0]),
302
        .EN(ce),
303
        .WE(we),
304
        .DO(doq[7:0])
305
);
306
 
307
//
308
// Block 1
309
//
310
RAMB4_S8 ramb4_s8_1(
311
        .CLK(clk),
312
        .RST(1'b0),
313
        .ADDR(addr),
314
        .DI(di[15:8]),
315
        .EN(ce),
316
        .WE(we),
317
        .DO(doq[15:8])
318
);
319
 
320
//
321
// Block 2
322
//
323
RAMB4_S8 ramb4_s8_2(
324
        .CLK(clk),
325
        .RST(1'b0),
326
        .ADDR(addr),
327
        .DI({4'b0000, di[19:16]}),
328
        .EN(ce),
329
        .WE(we),
330
        .DO({unconnected, doq[19:16]})
331
);
332
 
333
`else
334
 
335
`ifdef OR1200_XILINX_RAMB16
336
 
337
//
338
// Instantiation of FPGA memory:
339
//
340
// Virtex4/Spartan3E
341
//
342
// Added By Nir Mor
343
//
344
 
345
RAMB16_S36 ramb16_s36(
346
        .CLK(clk),
347
        .SSR(1'b0),
348
        .ADDR(addr),
349
        .DI({12'h000,di}),
350
        .DIP(4'h0),
351
        .EN(ce),
352
        .WE(we),
353
        .DO({unconnected,doq}),
354
        .DOP()
355
);
356
 
357
`else
358
 
359
`ifdef OR1200_ALTERA_LPM
360
 
361
//
362
// Instantiation of FPGA memory:
363
//
364
// Altera LPM
365
//
366
// Added By Jamil Khatib
367
//
368
 
369
wire    wr;
370
 
371
assign  wr = ce & we;
372
 
373
initial $display("Using Altera LPM.");
374
 
375
lpm_ram_dq lpm_ram_dq_component (
376
        .address(addr),
377
        .inclock(clk),
378
        .outclock(clk),
379
        .data(di),
380
        .we(wr),
381
        .q(doq)
382
);
383
 
384
defparam lpm_ram_dq_component.lpm_width = dw,
385
        lpm_ram_dq_component.lpm_widthad = aw,
386
        lpm_ram_dq_component.lpm_indata = "REGISTERED",
387
        lpm_ram_dq_component.lpm_address_control = "REGISTERED",
388
        lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",
389
        lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";
390
        // examplar attribute lpm_ram_dq_component NOOPT TRUE
391
 
392
`else
393
 
394
//
395
// Generic single-port synchronous RAM model
396
//
397
 
398
//
399
// Generic RAM's registers and wires
400
//
401
reg     [dw-1:0] mem [(1<<aw)-1:0];       // RAM content
402
reg     [aw-1:0] addr_reg;               // RAM address register
403
 
404
//
405
// Data output drivers
406
//
407
assign doq = (oe) ? mem[addr_reg] : {dw{1'b0}};
408
 
409
//
410
// RAM address register
411
//
412 358 julius
always @(posedge clk or `OR1200_RST_EVENT rst)
413
        if (rst == `OR1200_RST_VALUE)
414 350 julius
                addr_reg <=  {aw{1'b0}};
415
        else if (ce)
416
                addr_reg <=  addr;
417
 
418
//
419
// RAM write
420
//
421
always @(posedge clk)
422
        if (ce && we)
423
                mem[addr] <=  di;
424
 
425
`endif  // !OR1200_ALTERA_LPM
426
`endif  // !OR1200_XILINX_RAMB16
427
`endif  // !OR1200_XILINX_RAMB4
428
`endif  // !OR1200_VIRTUALSILICON_SSP
429
`endif  // !OR1200_VIRAGE_SSP
430
`endif  // !OR1200_AVANT_ATP
431
`endif  // !OR1200_ARTISAN_SSP
432
 
433
endmodule

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