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[/] [versatile_library/] [trunk/] [rtl/] [verilog/] [versatile_library.v] - Blame information for rev 104

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Line No. Rev Author Line
1 40 unneback 
`ifndef BASE
2 
`define BASE vl_
3 
`endif
4 
 
5 60 unneback 
// default SYN_KEEP definition
6 
`define SYN_KEEP /*synthesis syn_keep = 1*/
7 
 
8 44 unneback 
`ifdef ACTEL
9 60 unneback 
`undef SYN_KEEP
10 44 unneback 
`define SYN_KEEP /*synthesis syn_keep = 1*/
11 
`endif
12 
 
13 98 unneback 
`ifdef ACTEL
14 
    // ACTEL FPGA should not use logic to handle rw collision
15 
    `define SYN_NO_RW_CHECK /*synthesis syn_ramstyle = "no_rw_check"*/
16 
`else
17 
    `define SYN_NO_RW_CHECK
18 
`endif
19 
 
20 40 unneback 
`ifdef ALL
21 
 
22 
`define GBUF
23 
`define SYNC_RST
24 
`define PLL
25 
 
26 
`define MULTS
27 
`define MULTS18X18
28 
`define MULT
29 
`define SHIFT_UNIT_32
30 
`define LOGIC_UNIT
31 
 
32 
`define CNT_SHREG_WRAP
33 
`define CNT_SHREG_CE_WRAP
34 
`define CNT_SHREG_CE_CLEAR
35 
`define CNT_SHREG_CE_CLEAR_WRAP
36 
 
37 
`define MUX_ANDOR
38 
`define MUX2_ANDOR
39 
`define MUX3_ANDOR
40 
`define MUX4_ANDOR
41 
`define MUX5_ANDOR
42 
`define MUX6_ANDOR
43 43 unneback 
`define PARITY
44 40 unneback 
 
45 
`define ROM_INIT
46 
`define RAM
47 
`define RAM_BE
48 
`define DPRAM_1R1W
49 
`define DPRAM_2R1W
50 100 unneback 
`define DPRAM_1R2W
51 40 unneback 
`define DPRAM_2R2W
52 75 unneback 
`define DPRAM_BE_2R2W
53 40 unneback 
`define FIFO_1R1W_FILL_LEVEL_SYNC
54 
`define FIFO_2R2W_SYNC_SIMPLEX
55 
`define FIFO_CMP_ASYNC
56 
`define FIFO_1R1W_ASYNC
57 
`define FIFO_2R2W_ASYNC
58 
`define FIFO_2R2W_ASYNC_SIMPLEX
59 48 unneback 
`define REG_FILE
60 40 unneback 
 
61 
`define DFF
62 
`define DFF_ARRAY
63 
`define DFF_CE
64 
`define DFF_CE_CLEAR
65 
`define DF_CE_SET
66 
`define SPR
67 
`define SRP
68 
`define DFF_SR
69 
`define LATCH
70 
`define SHREG
71 
`define SHREG_CE
72 
`define DELAY
73 
`define DELAY_EMPTYFLAG
74 94 unneback 
`define PULSE2TOGGLE
75 
`define TOGGLE2PULSE
76 
`define SYNCHRONIZER
77 
`define CDC
78 40 unneback 
 
79 75 unneback 
`define WB3AVALON_BRIDGE
80 40 unneback 
`define WB3WB3_BRIDGE
81 
`define WB3_ARBITER_TYPE1
82 83 unneback 
`define WB_ADR_INC
83 101 unneback 
`define WB_RAM
84 103 unneback 
`define WB_SHADOW_RAM
85 48 unneback 
`define WB_B4_ROM
86 40 unneback 
`define WB_BOOT_ROM
87 
`define WB_DPRAM
88 101 unneback 
`define WB_CACHE
89 103 unneback 
`define WB_AVALON_BRIDGE
90 
`define WB_AVALON_MEM_CACHE
91 40 unneback 
 
92 44 unneback 
`define IO_DFF_OE
93 
`define O_DFF
94 
 
95 40 unneback 
`endif
96 
 
97 
`ifdef PLL
98 
`ifndef SYNC_RST
99 
`define SYNC_RST
100 
`endif
101 
`endif
102 
 
103 
`ifdef SYNC_RST
104 
`ifndef GBUF
105 
`define GBUF
106 
`endif
107 
`endif
108 
 
109 92 unneback 
`ifdef WB_B3_DPRAM
110 
`ifndef WB_ADR_INC
111 
`define WB_ADR_INC
112 40 unneback 
`endif
113 92 unneback 
`ifndef DPRAM_BE_2R2W
114 
`define DPRAM_BE_2R2W
115 40 unneback 
`endif
116 
`endif
117 
 
118 101 unneback 
`ifdef WB_RAM
119 83 unneback 
`ifndef WB_ADR_INC
120 
`define WB_ADR_INC
121 62 unneback 
`endif
122 
`ifndef RAM_BE
123 
`define RAM_BE
124 
`endif
125 
`endif
126 
 
127 40 unneback 
`ifdef WB3_ARBITER_TYPE1
128 42 unneback 
`ifndef SPR
129 
`define SPR
130 
`endif
131 40 unneback 
`ifndef MUX_ANDOR
132 
`define MUX_ANDOR
133 
`endif
134 
`endif
135 
 
136 76 unneback 
`ifdef WB3AVALON_BRIDGE
137 
`ifndef WB3WB3_BRIDGE
138 
`define WB3WB3_BRIDGE
139 
`endif
140 
`endif
141 
 
142 40 unneback 
`ifdef WB3WB3_BRIDGE
143 
`ifndef CNT_SHREG_CE_CLEAR
144 
`define CNT_SHREG_CE_CLEAR
145 
`endif
146 
`ifndef DFF
147 
`define DFF
148 
`endif
149 
`ifndef DFF_CE
150 
`define DFF_CE
151 
`endif
152 
`ifndef CNT_SHREG_CE_CLEAR
153 
`define CNT_SHREG_CE_CLEAR
154 
`endif
155 
`ifndef FIFO_2R2W_ASYNC_SIMPLEX
156 
`define FIFO_2R2W_ASYNC_SIMPLEX
157 
`endif
158 
`endif
159 
 
160 103 unneback 
 
161 
`ifdef WB_AVALON_MEM_CACHE
162 
`ifndef WB_SHADOW_RAM
163 
`define WB_SHADOW_RAM
164 
`endif
165 
`ifndef WB_CACHE
166 
`define WB_CACHE
167 
`endif
168 
`ifndef WB_AVALON_BRIDGE
169 
`define WB_AVALON_BRIDGE
170 
`endif
171 
`endif
172 
 
173 101 unneback 
`ifdef WB_CACHE
174 100 unneback 
`ifndef RAM
175 
`define RAM
176 
`endif
177 
`ifndef WB_ADR_INC
178 
`define WB_ADR_INC
179 
`endif
180 
`ifndef DPRAM_1R1W
181 
`define DPRAM_1R1W
182 
`endif
183 
`ifndef DPRAM_1R2W
184 
`define DPRAM_1R2W
185 
`endif
186 
`ifndef DPRAM_BE_2R2W
187 
`define DPRAM_BE_2R2W
188 
`endif
189 
`ifndef CDC
190 
`define CDC
191 
`endif
192 
`endif
193 103 unneback 
 
194 
`ifdef WB_SHADOW_RAM
195 
`ifndef WB_RAM
196 
`define WB_RAM
197 
`endif
198 
`endif
199 
 
200 
`ifdef WB_RAM
201 
`ifndef WB_ADR_INC
202 
`define WB_ADR_INC
203 
`endif
204 
`endif
205 97 unneback 
 
206 40 unneback 
`ifdef MULTS18X18
207 
`ifndef MULTS
208 
`define MULTS
209 
`endif
210 
`endif
211 
 
212 
`ifdef SHIFT_UNIT_32
213 
`ifndef MULTS
214 
`define MULTS
215 
`endif
216 
`endif
217 
 
218 
`ifdef MUX2_ANDOR
219 
`ifndef MUX_ANDOR
220 
`define MUX_ANDOR
221 
`endif
222 
`endif
223 
 
224 
`ifdef MUX3_ANDOR
225 
`ifndef MUX_ANDOR
226 
`define MUX_ANDOR
227 
`endif
228 
`endif
229 
 
230 
`ifdef MUX4_ANDOR
231 
`ifndef MUX_ANDOR
232 
`define MUX_ANDOR
233 
`endif
234 
`endif
235 
 
236 
`ifdef MUX5_ANDOR
237 
`ifndef MUX_ANDOR
238 
`define MUX_ANDOR
239 
`endif
240 
`endif
241 
 
242 
`ifdef MUX6_ANDOR
243 
`ifndef MUX_ANDOR
244 
`define MUX_ANDOR
245 
`endif
246 
`endif
247 
 
248 
`ifdef FIFO_1R1W_FILL_LEVEL_SYNC
249 
`ifndef CNT_BIN_CE
250 
`define CNT_BIN_CE
251 
`endif
252 
`ifndef DPRAM_1R1W
253 
`define DPRAM_1R1W
254 
`endif
255 
`ifndef CNT_BIN_CE_REW_Q_ZQ_L1
256 
`define CNT_BIN_CE_REW_Q_ZQ_L1
257 
`endif
258 
`endif
259 
 
260 
`ifdef FIFO_1R1W_FILL_LEVEL_SYNC
261 
`ifndef CNT_LFSR_CE
262 
`define CNT_LFSR_CE
263 
`endif
264 
`ifndef DPRAM_2R2W
265 
`define DPRAM_2R2W
266 
`endif
267 
`ifndef CNT_BIN_CE_REW_ZQ_L1
268 
`define CNT_BIN_CE_REW_ZQ_L1
269 
`endif
270 
`endif
271 
 
272 
`ifdef FIFO_2R2W_ASYNC_SIMPLEX
273 
`ifndef CNT_GRAY_CE_BIN
274 
`define CNT_GRAY_CE_BIN
275 
`endif
276 
`ifndef DPRAM_2R2W
277 
`define DPRAM_2R2W
278 
`endif
279 
`ifndef FIFO_CMP_ASYNC
280 
`define FIFO_CMP_ASYNC
281 
`endif
282 
`endif
283 
 
284 
`ifdef FIFO_2R2W_ASYNC
285 
`ifndef FIFO_1R1W_ASYNC
286 
`define FIFO_1R1W_ASYNC
287 
`endif
288 
`endif
289 
 
290 
`ifdef FIFO_1R1W_ASYNC
291 
`ifndef CNT_GRAY_CE_BIN
292 
`define CNT_GRAY_CE_BIN
293 
`endif
294 
`ifndef DPRAM_1R1W
295 
`define DPRAM_1R1W
296 
`endif
297 
`ifndef FIFO_CMP_ASYNC
298 
`define FIFO_CMP_ASYNC
299 
`endif
300 
`endif
301 
 
302 
`ifdef FIFO_CMP_ASYNC
303 
`ifndef DFF_SR
304 
`define DFF_SR
305 
`endif
306 
`ifndef DFF
307 
`define DFF
308 
`endif
309 
`endif
310 48 unneback 
 
311 
`ifdef REG_FILE
312 
`ifndef DPRAM_1R1W
313 
`define DPRAM_1R1W
314 
`endif
315 
`endif
316 97 unneback 
 
317 98 unneback 
`ifdef CDC
318 
`ifndef PULSE2TOGGLE
319 
`define PULSE2TOGGLE
320 
`endif
321 
`ifndef TOGGLE2PULSE
322 
`define TOGGLE2PULSE
323 
`endif
324 
`ifndef SYNCHRONIZER
325 
`define SYNCHRONIZER
326 
`endif
327 
`endif
328 
 
329 97 unneback 
// size to width
330 100 unneback 
`define SIZE2WIDTH_EXPR = (`SIZE2WIDTH==1) ? 0 : (`SIZE2WIDTH==2) ? 1 : (`SIZE2WIDTH==4) ? 2 : (`SIZE2WIDTH==8) ? 3 : (`SIZE2WIDTH==16) ? 4 : (`SIZE2WIDTH==32) ? 5 : (`SIZE2WIDTH==64) ? 6 : (`SIZE2WIDTH==128) ? 7 : 8;
331 62 unneback 
//////////////////////////////////////////////////////////////////////
332 6 unneback 
////                                                              ////
333 
////  Versatile library, clock and reset                          ////
334 
////                                                              ////
335 
////  Description                                                 ////
336 
////  Logic related to clock and reset                            ////
337 
////                                                              ////
338 
////                                                              ////
339 
////  To Do:                                                      ////
340 
////   - add more different registers                             ////
341 
////                                                              ////
342 
////  Author(s):                                                  ////
343 
////      - Michael Unneback, unneback@opencores.org              ////
344 
////        ORSoC AB                                              ////
345 
////                                                              ////
346 
//////////////////////////////////////////////////////////////////////
347 
////                                                              ////
348 
//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////
349 
////                                                              ////
350 
//// This source file may be used and distributed without         ////
351 
//// restriction provided that this copyright statement is not    ////
352 
//// removed from the file and that any derivative work contains  ////
353 
//// the original copyright notice and the associated disclaimer. ////
354 
////                                                              ////
355 
//// This source file is free software; you can redistribute it   ////
356 
//// and/or modify it under the terms of the GNU Lesser General   ////
357 
//// Public License as published by the Free Software Foundation; ////
358 
//// either version 2.1 of the License, or (at your option) any   ////
359 
//// later version.                                               ////
360 
////                                                              ////
361 
//// This source is distributed in the hope that it will be       ////
362 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
363 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
364 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
365 
//// details.                                                     ////
366 
////                                                              ////
367 
//// You should have received a copy of the GNU Lesser General    ////
368 
//// Public License along with this source; if not, download it   ////
369 
//// from http://www.opencores.org/lgpl.shtml                     ////
370 
////                                                              ////
371 
//////////////////////////////////////////////////////////////////////
372 
 
373 48 unneback 
`ifdef ACTEL
374 
`ifdef GBUF
375 
`timescale 1 ns/100 ps
376 6 unneback 
// Global buffer
377 
// usage:
378 
// use to enable global buffers for high fan out signals such as clock and reset
379 
// Version: 8.4 8.4.0.33
380 
module gbuf(GL,CLK);
381 
output GL;
382 
input  CLK;
383 
 
384 
    wire GND;
385 
 
386 
    GND GND_1_net(.Y(GND));
387 
    CLKDLY Inst1(.CLK(CLK), .GL(GL), .DLYGL0(GND), .DLYGL1(GND),
388 
        .DLYGL2(GND), .DLYGL3(GND), .DLYGL4(GND)) /* synthesis black_box */;
389 
 
390 
endmodule
391 
`timescale 1 ns/1 ns
392 40 unneback 
`define MODULE gbuf
393 
module `BASE`MODULE ( i, o);
394 
`undef MODULE
395 6 unneback 
input i;
396 
output o;
397 
`ifdef SIM_GBUF
398 
assign o=i;
399 
`else
400 
gbuf gbuf_i0 ( .CLK(i), .GL(o));
401 
`endif
402 
endmodule
403 40 unneback 
`endif
404 33 unneback 
 
405 6 unneback 
`else
406 33 unneback 
 
407 40 unneback 
`ifdef ALTERA
408 
`ifdef GBUF
409 21 unneback 
//altera
410 40 unneback 
`define MODULE gbuf
411 
module `BASE`MODULE ( i, o);
412 
`undef MODULE
413 33 unneback 
input i;
414 
output o;
415 
assign o = i;
416 
endmodule
417 40 unneback 
`endif
418 33 unneback 
 
419 6 unneback 
`else
420 
 
421 40 unneback 
`ifdef GBUF
422 6 unneback 
`timescale 1 ns/100 ps
423 40 unneback 
`define MODULE
424 
module `BASE`MODULE ( i, o);
425 
`undef MODULE
426 6 unneback 
input i;
427 
output o;
428 
assign o = i;
429 
endmodule
430 40 unneback 
`endif
431 6 unneback 
`endif // ALTERA
432 
`endif //ACTEL
433 
 
434 40 unneback 
`ifdef SYNC_RST
435 6 unneback 
// sync reset
436 17 unneback 
// input active lo async reset, normally from external reset generator and/or switch
437 6 unneback 
// output active high global reset sync with two DFFs
438 
`timescale 1 ns/100 ps
439 40 unneback 
`define MODULE sync_rst
440 
module `BASE`MODULE ( rst_n_i, rst_o, clk);
441 
`undef MODULE
442 6 unneback 
input rst_n_i, clk;
443 
output rst_o;
444 18 unneback 
reg [1:0] tmp;
445 6 unneback 
always @ (posedge clk or negedge rst_n_i)
446 
if (!rst_n_i)
447 17 unneback 
        tmp <= 2'b11;
448 6 unneback 
else
449 33 unneback 
        tmp <= {1'b0,tmp[1]};
450 40 unneback 
`define MODULE gbuf
451 
`BASE`MODULE buf_i0( .i(tmp[0]), .o(rst_o));
452 
`undef MODULE
453 6 unneback 
endmodule
454 40 unneback 
`endif
455 6 unneback 
 
456 40 unneback 
`ifdef PLL
457 6 unneback 
// vl_pll
458 
`ifdef ACTEL
459 32 unneback 
///////////////////////////////////////////////////////////////////////////////
460 17 unneback 
`timescale 1 ps/1 ps
461 40 unneback 
`define MODULE pll
462 
module `BASE`MODULE ( clk_i, rst_n_i, lock, clk_o, rst_o);
463 
`undef MODULE
464 6 unneback 
parameter index = 0;
465 
parameter number_of_clk = 1;
466 17 unneback 
parameter period_time_0 = 20000;
467 
parameter period_time_1 = 20000;
468 
parameter period_time_2 = 20000;
469 
parameter lock_delay = 2000000;
470 6 unneback 
input clk_i, rst_n_i;
471 
output lock;
472 
output reg [0:number_of_clk-1] clk_o;
473 
output [0:number_of_clk-1] rst_o;
474 
 
475 
`ifdef SIM_PLL
476 
 
477 
always
478 
     #((period_time_0)/2) clk_o[0] <=  (!rst_n_i) ? 0 : ~clk_o[0];
479 
 
480 
generate if (number_of_clk > 1)
481 
always
482 
     #((period_time_1)/2) clk_o[1] <=  (!rst_n_i) ? 0 : ~clk_o[1];
483 
endgenerate
484 
 
485 
generate if (number_of_clk > 2)
486 
always
487 
     #((period_time_2)/2) clk_o[2] <=  (!rst_n_i) ? 0 : ~clk_o[2];
488 
endgenerate
489 
 
490 
genvar i;
491 
generate for (i=0;i<number_of_clk;i=i+1) begin: clock
492 
     vl_sync_rst rst_i0 ( .rst_n_i(rst_n_i | lock), .rst_o(rst_o[i]), .clk(clk_o[i]));
493 
end
494 
endgenerate
495 
 
496 
assign #lock_delay lock = rst_n_i;
497 
 
498 
endmodule
499 
`else
500 
generate if (number_of_clk==1 & index==0) begin
501 
        pll0 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]));
502 
end
503 
endgenerate // index==0
504 
generate if (number_of_clk==1 & index==1) begin
505 
        pll1 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]));
506 
end
507 
endgenerate // index==1
508 
generate if (number_of_clk==1 & index==2) begin
509 
        pll2 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]));
510 
end
511 
endgenerate // index==2
512 
generate if (number_of_clk==1 & index==3) begin
513 
        pll3 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]));
514 
end
515 
endgenerate // index==0
516 
 
517 
generate if (number_of_clk==2 & index==0) begin
518 
        pll0 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]), .GLB(clk_o[1]));
519 
end
520 
endgenerate // index==0
521 
generate if (number_of_clk==2 & index==1) begin
522 
        pll1 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]), .GLB(clk_o[1]));
523 
end
524 
endgenerate // index==1
525 
generate if (number_of_clk==2 & index==2) begin
526 
        pll2 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]), .GLB(clk_o[1]));
527 
end
528 
endgenerate // index==2
529 
generate if (number_of_clk==2 & index==3) begin
530 
        pll3 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]), .GLB(clk_o[1]));
531 
end
532 
endgenerate // index==0
533 
 
534 
generate if (number_of_clk==3 & index==0) begin
535 
        pll0 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]), .GLB(clk_o[1]), .GLC(clk_o[2]));
536 
end
537 
endgenerate // index==0
538 
generate if (number_of_clk==3 & index==1) begin
539 
        pll1 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]), .GLB(clk_o[1]), .GLC(clk_o[2]));
540 
end
541 
endgenerate // index==1
542 
generate if (number_of_clk==3 & index==2) begin
543 
        pll2 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]), .GLB(clk_o[1]), .GLC(clk_o[2]));
544 
end
545 
endgenerate // index==2
546 
generate if (number_of_clk==3 & index==3) begin
547 
        pll3 pll_i0 (.POWERDOWN(1'b1), .CLKA(clk_i), .LOCK(lock), .GLA(clk_o[0]), .GLB(clk_o[1]), .GLC(clk_o[2]));
548 
end
549 
endgenerate // index==0
550 
 
551 
genvar i;
552 
generate for (i=0;i<number_of_clk;i=i+1) begin: clock
553 40 unneback 
`define MODULE sync_rst
554 
        `BASE`MODULE rst_i0 ( .rst_n_i(rst_n_i | lock), .rst_o(rst_o), .clk(clk_o[i]));
555 
`undef MODULE
556 6 unneback 
end
557 
endgenerate
558 
endmodule
559 
`endif
560 32 unneback 
///////////////////////////////////////////////////////////////////////////////
561 6 unneback 
 
562 
`else
563 
 
564 32 unneback 
///////////////////////////////////////////////////////////////////////////////
565 6 unneback 
`ifdef ALTERA
566 
 
567 32 unneback 
`timescale 1 ps/1 ps
568 40 unneback 
`define MODULE pll
569 
module `BASE`MODULE ( clk_i, rst_n_i, lock, clk_o, rst_o);
570 
`undef MODULE
571 32 unneback 
parameter index = 0;
572 
parameter number_of_clk = 1;
573 
parameter period_time_0 = 20000;
574 
parameter period_time_1 = 20000;
575 
parameter period_time_2 = 20000;
576 
parameter period_time_3 = 20000;
577 
parameter period_time_4 = 20000;
578 
parameter lock_delay = 2000000;
579 
input clk_i, rst_n_i;
580 
output lock;
581 
output reg [0:number_of_clk-1] clk_o;
582 
output [0:number_of_clk-1] rst_o;
583 
 
584 
`ifdef SIM_PLL
585 
 
586 
always
587 
     #((period_time_0)/2) clk_o[0] <=  (!rst_n_i) ? 0 : ~clk_o[0];
588 
 
589 
generate if (number_of_clk > 1)
590 
always
591 
     #((period_time_1)/2) clk_o[1] <=  (!rst_n_i) ? 0 : ~clk_o[1];
592 
endgenerate
593 
 
594 
generate if (number_of_clk > 2)
595 
always
596 
     #((period_time_2)/2) clk_o[2] <=  (!rst_n_i) ? 0 : ~clk_o[2];
597 
endgenerate
598 
 
599 33 unneback 
generate if (number_of_clk > 3)
600 32 unneback 
always
601 
     #((period_time_3)/2) clk_o[3] <=  (!rst_n_i) ? 0 : ~clk_o[3];
602 
endgenerate
603 
 
604 33 unneback 
generate if (number_of_clk > 4)
605 32 unneback 
always
606 
     #((period_time_4)/2) clk_o[4] <=  (!rst_n_i) ? 0 : ~clk_o[4];
607 
endgenerate
608 
 
609 
genvar i;
610 
generate for (i=0;i<number_of_clk;i=i+1) begin: clock
611 
     vl_sync_rst rst_i0 ( .rst_n_i(rst_n_i | lock), .rst_o(rst_o[i]), .clk(clk_o[i]));
612 
end
613 
endgenerate
614 
 
615 33 unneback 
//assign #lock_delay lock = rst_n_i;
616 
assign lock = rst_n_i;
617 32 unneback 
 
618 
endmodule
619 6 unneback 
`else
620 
 
621 33 unneback 
`ifdef VL_PLL0
622 
`ifdef VL_PLL0_CLK1
623 
    pll0 pll0_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]));
624 
`endif
625 
`ifdef VL_PLL0_CLK2
626 
    pll0 pll0_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]));
627 
`endif
628 
`ifdef VL_PLL0_CLK3
629 
    pll0 pll0_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]));
630 
`endif
631 
`ifdef VL_PLL0_CLK4
632 
    pll0 pll0_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]), .c3(clk_o[3]));
633 
`endif
634 
`ifdef VL_PLL0_CLK5
635 
    pll0 pll0_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]), .c3(clk_o[3]), .c4(clk_o[4]));
636 
`endif
637 
`endif
638 32 unneback 
 
639 33 unneback 
`ifdef VL_PLL1
640 
`ifdef VL_PLL1_CLK1
641 
    pll1 pll1_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]));
642 
`endif
643 
`ifdef VL_PLL1_CLK2
644 
    pll1 pll1_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]));
645 
`endif
646 
`ifdef VL_PLL1_CLK3
647 
    pll1 pll1_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]));
648 
`endif
649 
`ifdef VL_PLL1_CLK4
650 
    pll1 pll1_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]), .c3(clk_o[3]));
651 
`endif
652 
`ifdef VL_PLL1_CLK5
653 
    pll1 pll1_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]), .c3(clk_o[3]), .c4(clk_o[4]));
654 
`endif
655 
`endif
656 32 unneback 
 
657 33 unneback 
`ifdef VL_PLL2
658 
`ifdef VL_PLL2_CLK1
659 
    pll2 pll2_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]));
660 
`endif
661 
`ifdef VL_PLL2_CLK2
662 
    pll2 pll2_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]));
663 
`endif
664 
`ifdef VL_PLL2_CLK3
665 
    pll2 pll2_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]));
666 
`endif
667 
`ifdef VL_PLL2_CLK4
668 
    pll2 pll2_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]), .c3(clk_o[3]));
669 
`endif
670 
`ifdef VL_PLL2_CLK5
671 
    pll2 pll2_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]), .c3(clk_o[3]), .c4(clk_o[4]));
672 
`endif
673 
`endif
674 32 unneback 
 
675 33 unneback 
`ifdef VL_PLL3
676 
`ifdef VL_PLL3_CLK1
677 
    pll3 pll3_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]));
678 
`endif
679 
`ifdef VL_PLL3_CLK2
680 
    pll3 pll3_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]));
681 
`endif
682 
`ifdef VL_PLL3_CLK3
683 
    pll3 pll3_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]));
684 
`endif
685 
`ifdef VL_PLL3_CLK4
686 
    pll3 pll3_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]), .c3(clk_o[3]));
687 
`endif
688 
`ifdef VL_PLL3_CLK5
689 
    pll3 pll3_i0 (.areset(rst_n_i), .inclk0(clk_i), .locked(lock), .c0(clk_o[0]), .c1(clk_o[1]), .c2(clk_o[2]), .c3(clk_o[3]), .c4(clk_o[4]));
690 
`endif
691 
`endif
692 32 unneback 
 
693 
genvar i;
694 
generate for (i=0;i<number_of_clk;i=i+1) begin: clock
695 40 unneback 
`define MODULE sync_rst
696 
        `BASE`MODULE rst_i0 ( .rst_n_i(rst_n_i | lock), .rst_o(rst_o[i]), .clk(clk_o[i]));
697 
`undef MODULE
698 32 unneback 
end
699 
endgenerate
700 
endmodule
701 
`endif
702 
///////////////////////////////////////////////////////////////////////////////
703 
 
704 
`else
705 
 
706 6 unneback 
// generic PLL
707 17 unneback 
`timescale 1 ps/1 ps
708 40 unneback 
`define MODULE pll
709 
module `BASE`MODULE ( clk_i, rst_n_i, lock, clk_o, rst_o);
710 
`undef MODULE
711 6 unneback 
parameter index = 0;
712 
parameter number_of_clk = 1;
713 17 unneback 
parameter period_time_0 = 20000;
714 
parameter period_time_1 = 20000;
715 
parameter period_time_2 = 20000;
716 6 unneback 
parameter lock_delay = 2000;
717 
input clk_i, rst_n_i;
718 
output lock;
719 
output reg [0:number_of_clk-1] clk_o;
720 
output [0:number_of_clk-1] rst_o;
721 
 
722 
always
723 
     #((period_time_0)/2) clk_o[0] <=  (!rst_n_i) ? 0 : ~clk_o[0];
724 
 
725 
generate if (number_of_clk > 1)
726 
always
727 
     #((period_time_1)/2) clk_o[1] <=  (!rst_n_i) ? 0 : ~clk_o[1];
728 
endgenerate
729 
 
730 
generate if (number_of_clk > 2)
731 
always
732 
     #((period_time_2)/2) clk_o[2] <=  (!rst_n_i) ? 0 : ~clk_o[2];
733 
endgenerate
734 
 
735 
genvar i;
736 
generate for (i=0;i<number_of_clk;i=i+1) begin: clock
737 40 unneback 
`define MODULE sync_rst
738 
     `BASE`MODULE rst_i0 ( .rst_n_i(rst_n_i | lock), .rst_o(rst_o[i]), .clk(clk_o[i]));
739 
`undef MODULE
740 6 unneback 
end
741 
endgenerate
742 
 
743 
assign #lock_delay lock = rst_n_i;
744 
 
745 
endmodule
746 
 
747 
`endif //altera
748 17 unneback 
`endif //actel
749 40 unneback 
`undef MODULE
750 
`endif//////////////////////////////////////////////////////////////////////
751 6 unneback 
////                                                              ////
752 
////  Versatile library, registers                                ////
753 
////                                                              ////
754 
////  Description                                                 ////
755 
////  Different type of registers                                 ////
756 
////                                                              ////
757 
////                                                              ////
758 
////  To Do:                                                      ////
759 
////   - add more different registers                             ////
760 
////                                                              ////
761 
////  Author(s):                                                  ////
762 
////      - Michael Unneback, unneback@opencores.org              ////
763 
////        ORSoC AB                                              ////
764 
////                                                              ////
765 
//////////////////////////////////////////////////////////////////////
766 
////                                                              ////
767 
//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////
768 
////                                                              ////
769 
//// This source file may be used and distributed without         ////
770 
//// restriction provided that this copyright statement is not    ////
771 
//// removed from the file and that any derivative work contains  ////
772 
//// the original copyright notice and the associated disclaimer. ////
773 
////                                                              ////
774 
//// This source file is free software; you can redistribute it   ////
775 
//// and/or modify it under the terms of the GNU Lesser General   ////
776 
//// Public License as published by the Free Software Foundation; ////
777 
//// either version 2.1 of the License, or (at your option) any   ////
778 
//// later version.                                               ////
779 
////                                                              ////
780 
//// This source is distributed in the hope that it will be       ////
781 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
782 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
783 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
784 
//// details.                                                     ////
785 
////                                                              ////
786 
//// You should have received a copy of the GNU Lesser General    ////
787 
//// Public License along with this source; if not, download it   ////
788 
//// from http://www.opencores.org/lgpl.shtml                     ////
789 
////                                                              ////
790 
//////////////////////////////////////////////////////////////////////
791 
 
792 40 unneback 
`ifdef DFF
793 
`define MODULE dff
794 
module `BASE`MODULE ( d, q, clk, rst);
795 
`undef MODULE
796 6 unneback 
        parameter width = 1;
797 
        parameter reset_value = 0;
798 
 
799 
        input [width-1:0] d;
800 
        input clk, rst;
801 
        output reg [width-1:0] q;
802 
 
803 
        always @ (posedge clk or posedge rst)
804 
        if (rst)
805 
                q <= reset_value;
806 
        else
807 
                q <= d;
808 
 
809 
endmodule
810 40 unneback 
`endif
811 6 unneback 
 
812 40 unneback 
`ifdef DFF_ARRAY
813 
`define MODULE dff_array
814 
module `BASE`MODULE ( d, q, clk, rst);
815 
`undef MODULE
816 6 unneback 
 
817 
        parameter width = 1;
818 
        parameter depth = 2;
819 
        parameter reset_value = 1'b0;
820 
 
821 
        input [width-1:0] d;
822 
        input clk, rst;
823 
        output [width-1:0] q;
824 
        reg  [0:depth-1] q_tmp [width-1:0];
825 
        integer i;
826 
        always @ (posedge clk or posedge rst)
827 
        if (rst) begin
828 
            for (i=0;i<depth;i=i+1)
829 
                q_tmp[i] <= {width{reset_value}};
830 
        end else begin
831 
            q_tmp[0] <= d;
832 
            for (i=1;i<depth;i=i+1)
833 
                q_tmp[i] <= q_tmp[i-1];
834 
        end
835 
 
836 
    assign q = q_tmp[depth-1];
837 
 
838 
endmodule
839 40 unneback 
`endif
840 6 unneback 
 
841 40 unneback 
`ifdef DFF_CE
842 
`define MODULE dff_ce
843 
module `BASE`MODULE ( d, ce, q, clk, rst);
844 
`undef MODULE
845 6 unneback 
 
846 
        parameter width = 1;
847 
        parameter reset_value = 0;
848 
 
849 
        input [width-1:0] d;
850 
        input ce, clk, rst;
851 
        output reg [width-1:0] q;
852 
 
853 
        always @ (posedge clk or posedge rst)
854 
        if (rst)
855 
                q <= reset_value;
856 
        else
857 
                if (ce)
858 
                        q <= d;
859 
 
860 
endmodule
861 40 unneback 
`endif
862 6 unneback 
 
863 40 unneback 
`ifdef DFF_CE_CLEAR
864 
`define MODULE dff_ce_clear
865 
module `BASE`MODULE ( d, ce, clear, q, clk, rst);
866 
`undef MODULE
867 8 unneback 
 
868 
        parameter width = 1;
869 
        parameter reset_value = 0;
870 
 
871 
        input [width-1:0] d;
872 10 unneback 
        input ce, clear, clk, rst;
873 8 unneback 
        output reg [width-1:0] q;
874 
 
875 
        always @ (posedge clk or posedge rst)
876 
        if (rst)
877 
            q <= reset_value;
878 
        else
879 
            if (ce)
880 
                if (clear)
881 
                    q <= {width{1'b0}};
882 
                else
883 
                    q <= d;
884 
 
885 
endmodule
886 40 unneback 
`endif
887 8 unneback 
 
888 40 unneback 
`ifdef DF_CE_SET
889 
`define MODULE dff_ce_set
890 
module `BASE`MODULE ( d, ce, set, q, clk, rst);
891 
`undef MODULE
892 24 unneback 
 
893 
        parameter width = 1;
894 
        parameter reset_value = 0;
895 
 
896 
        input [width-1:0] d;
897 
        input ce, set, clk, rst;
898 
        output reg [width-1:0] q;
899 
 
900 
        always @ (posedge clk or posedge rst)
901 
        if (rst)
902 
            q <= reset_value;
903 
        else
904 
            if (ce)
905 
                if (set)
906 
                    q <= {width{1'b1}};
907 
                else
908 
                    q <= d;
909 
 
910 
endmodule
911 40 unneback 
`endif
912 24 unneback 
 
913 40 unneback 
`ifdef SPR
914 
`define MODULE spr
915 
module `BASE`MODULE ( sp, r, q, clk, rst);
916 
`undef MODULE
917 
 
918 64 unneback 
        //parameter width = 1;
919 
        parameter reset_value = 1'b0;
920 29 unneback 
 
921 
        input sp, r;
922 
        output reg q;
923 
        input clk, rst;
924 
 
925 
        always @ (posedge clk or posedge rst)
926 
        if (rst)
927 
            q <= reset_value;
928 
        else
929 
            if (sp)
930 
                q <= 1'b1;
931 
            else if (r)
932 
                q <= 1'b0;
933 
 
934 
endmodule
935 40 unneback 
`endif
936 29 unneback 
 
937 40 unneback 
`ifdef SRP
938 
`define MODULE srp
939 
module `BASE`MODULE ( s, rp, q, clk, rst);
940 
`undef MODULE
941 
 
942 29 unneback 
        parameter width = 1;
943 
        parameter reset_value = 0;
944 
 
945 
        input s, rp;
946 
        output reg q;
947 
        input clk, rst;
948 
 
949 
        always @ (posedge clk or posedge rst)
950 
        if (rst)
951 
            q <= reset_value;
952 
        else
953 
            if (rp)
954 
                q <= 1'b0;
955 
            else if (s)
956 
                q <= 1'b1;
957 
 
958 
endmodule
959 40 unneback 
`endif
960 29 unneback 
 
961 40 unneback 
`ifdef ALTERA
962 29 unneback 
 
963 40 unneback 
`ifdef DFF_SR
964 6 unneback 
// megafunction wizard: %LPM_FF%
965 
// GENERATION: STANDARD
966 
// VERSION: WM1.0
967 
// MODULE: lpm_ff
968 
 
969 
// ============================================================
970 
// File Name: dff_sr.v
971 
// Megafunction Name(s):
972 
//                      lpm_ff
973 
//
974 
// Simulation Library Files(s):
975 
//                      lpm
976 
// ============================================================
977 
// ************************************************************
978 
// THIS IS A WIZARD-GENERATED FILE. DO NOT EDIT THIS FILE!
979 
//
980 
// 9.1 Build 304 01/25/2010 SP 1 SJ Full Version
981 
// ************************************************************
982 
 
983 
 
984 
//Copyright (C) 1991-2010 Altera Corporation
985 
//Your use of Altera Corporation's design tools, logic functions
986 
//and other software and tools, and its AMPP partner logic
987 
//functions, and any output files from any of the foregoing
988 
//(including device programming or simulation files), and any
989 
//associated documentation or information are expressly subject
990 
//to the terms and conditions of the Altera Program License
991 
//Subscription Agreement, Altera MegaCore Function License
992 
//Agreement, or other applicable license agreement, including,
993 
//without limitation, that your use is for the sole purpose of
994 
//programming logic devices manufactured by Altera and sold by
995 
//Altera or its authorized distributors.  Please refer to the
996 
//applicable agreement for further details.
997 
 
998 
 
999 
// synopsys translate_off
1000 
`timescale 1 ps / 1 ps
1001 
// synopsys translate_on
1002 40 unneback 
`define MODULE dff_sr
1003 
module `BASE`MODULE (
1004 
`undef MODULE
1005 
 
1006 6 unneback 
        aclr,
1007 
        aset,
1008 
        clock,
1009 
        data,
1010 
        q);
1011 
 
1012 
        input     aclr;
1013 
        input     aset;
1014 
        input     clock;
1015 
        input     data;
1016 
        output    q;
1017 
 
1018 
        wire [0:0] sub_wire0;
1019 
        wire [0:0] sub_wire1 = sub_wire0[0:0];
1020 
        wire  q = sub_wire1;
1021 
        wire  sub_wire2 = data;
1022 
        wire  sub_wire3 = sub_wire2;
1023 
 
1024 
        lpm_ff  lpm_ff_component (
1025 
                                .aclr (aclr),
1026 
                                .clock (clock),
1027 
                                .data (sub_wire3),
1028 
                                .aset (aset),
1029 
                                .q (sub_wire0)
1030 
                                // synopsys translate_off
1031 
                                ,
1032 
                                .aload (),
1033 
                                .enable (),
1034 
                                .sclr (),
1035 
                                .sload (),
1036 
                                .sset ()
1037 
                                // synopsys translate_on
1038 
                                );
1039 
        defparam
1040 
                lpm_ff_component.lpm_fftype = "DFF",
1041 
                lpm_ff_component.lpm_type = "LPM_FF",
1042 
                lpm_ff_component.lpm_width = 1;
1043 
 
1044 
 
1045 
endmodule
1046 
 
1047 
// ============================================================
1048 
// CNX file retrieval info
1049 
// ============================================================
1050 
// Retrieval info: PRIVATE: ACLR NUMERIC "1"
1051 
// Retrieval info: PRIVATE: ALOAD NUMERIC "0"
1052 
// Retrieval info: PRIVATE: ASET NUMERIC "1"
1053 
// Retrieval info: PRIVATE: ASET_ALL1 NUMERIC "1"
1054 
// Retrieval info: PRIVATE: CLK_EN NUMERIC "0"
1055 
// Retrieval info: PRIVATE: DFF NUMERIC "1"
1056 
// Retrieval info: PRIVATE: INTENDED_DEVICE_FAMILY STRING "Cyclone IV E"
1057 
// Retrieval info: PRIVATE: SCLR NUMERIC "0"
1058 
// Retrieval info: PRIVATE: SLOAD NUMERIC "0"
1059 
// Retrieval info: PRIVATE: SSET NUMERIC "0"
1060 
// Retrieval info: PRIVATE: SSET_ALL1 NUMERIC "1"
1061 
// Retrieval info: PRIVATE: SYNTH_WRAPPER_GEN_POSTFIX STRING "0"
1062 
// Retrieval info: PRIVATE: UseTFFdataPort NUMERIC "0"
1063 
// Retrieval info: PRIVATE: nBit NUMERIC "1"
1064 
// Retrieval info: CONSTANT: LPM_FFTYPE STRING "DFF"
1065 
// Retrieval info: CONSTANT: LPM_TYPE STRING "LPM_FF"
1066 
// Retrieval info: CONSTANT: LPM_WIDTH NUMERIC "1"
1067 
// Retrieval info: USED_PORT: aclr 0 0 0 0 INPUT NODEFVAL aclr
1068 
// Retrieval info: USED_PORT: aset 0 0 0 0 INPUT NODEFVAL aset
1069 
// Retrieval info: USED_PORT: clock 0 0 0 0 INPUT NODEFVAL clock
1070 
// Retrieval info: USED_PORT: data 0 0 0 0 INPUT NODEFVAL data
1071 
// Retrieval info: USED_PORT: q 0 0 0 0 OUTPUT NODEFVAL q
1072 
// Retrieval info: CONNECT: @clock 0 0 0 0 clock 0 0 0 0
1073 
// Retrieval info: CONNECT: q 0 0 0 0 @q 0 0 1 0
1074 
// Retrieval info: CONNECT: @aclr 0 0 0 0 aclr 0 0 0 0
1075 
// Retrieval info: CONNECT: @aset 0 0 0 0 aset 0 0 0 0
1076 
// Retrieval info: CONNECT: @data 0 0 1 0 data 0 0 0 0
1077 
// Retrieval info: LIBRARY: lpm lpm.lpm_components.all
1078 
// Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr.v TRUE
1079 
// Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr.inc FALSE
1080 
// Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr.cmp FALSE
1081 
// Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr.bsf FALSE
1082 
// Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr_inst.v FALSE
1083 
// Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr_bb.v FALSE
1084 
// Retrieval info: LIB_FILE: lpm
1085 40 unneback 
`endif
1086 6 unneback 
 
1087 
`else
1088 
 
1089 40 unneback 
`ifdef DFF_SR
1090 
`define MODULE dff_sr
1091 
module `BASE`MODULE ( aclr, aset, clock, data, q);
1092 
`undef MODULE
1093 6 unneback 
 
1094 
    input         aclr;
1095 
    input         aset;
1096 
    input         clock;
1097 
    input         data;
1098 
    output reg    q;
1099 
 
1100 
   always @ (posedge clock or posedge aclr or posedge aset)
1101 
     if (aclr)
1102 
       q <= 1'b0;
1103 
     else if (aset)
1104 
       q <= 1'b1;
1105 
     else
1106 
       q <= data;
1107 
 
1108 
endmodule
1109 40 unneback 
`endif
1110 6 unneback 
 
1111 
`endif
1112 
 
1113 
// LATCH
1114 
// For targtes not supporting LATCH use dff_sr with clk=1 and data=1
1115 
`ifdef ALTERA
1116 40 unneback 
 
1117 
`ifdef LATCH
1118 
`define MODULE latch
1119 
module `BASE`MODULE ( d, le, q, clk);
1120 
`undef MODULE
1121 6 unneback 
input d, le;
1122 
output q;
1123 
input clk;
1124 
dff_sr i0 (.aclr(), .aset(), .clock(1'b1), .data(1'b1), .q(q));
1125 
endmodule
1126 40 unneback 
`endif
1127 
 
1128 6 unneback 
`else
1129 40 unneback 
 
1130 
`ifdef LATCH
1131 
`define MODULE latch
1132 
module `BASE`MODULE ( d, le, q, clk);
1133 
`undef MODULE
1134 6 unneback 
input d, le;
1135 48 unneback 
input clk;
1136 
always @ (le or d)
1137 60 unneback 
if (le)
1138 48 unneback 
    d <= q;
1139 6 unneback 
endmodule
1140 15 unneback 
`endif
1141 
 
1142 40 unneback 
`endif
1143 
 
1144 
`ifdef SHREG
1145 
`define MODULE shreg
1146 
module `BASE`MODULE ( d, q, clk, rst);
1147 
`undef MODULE
1148 
 
1149 17 unneback 
parameter depth = 10;
1150 
input d;
1151 
output q;
1152 
input clk, rst;
1153 
 
1154 
reg [1:depth] dffs;
1155 
 
1156 
always @ (posedge clk or posedge rst)
1157 
if (rst)
1158 
    dffs <= {depth{1'b0}};
1159 
else
1160 
    dffs <= {d,dffs[1:depth-1]};
1161 
assign q = dffs[depth];
1162 
endmodule
1163 40 unneback 
`endif
1164 17 unneback 
 
1165 40 unneback 
`ifdef SHREG_CE
1166 
`define MODULE shreg_ce
1167 
module `BASE`MODULE ( d, ce, q, clk, rst);
1168 
`undef MODULE
1169 17 unneback 
parameter depth = 10;
1170 
input d, ce;
1171 
output q;
1172 
input clk, rst;
1173 
 
1174 
reg [1:depth] dffs;
1175 
 
1176 
always @ (posedge clk or posedge rst)
1177 
if (rst)
1178 
    dffs <= {depth{1'b0}};
1179 
else
1180 
    if (ce)
1181 
        dffs <= {d,dffs[1:depth-1]};
1182 
assign q = dffs[depth];
1183 
endmodule
1184 40 unneback 
`endif
1185 17 unneback 
 
1186 40 unneback 
`ifdef DELAY
1187 
`define MODULE delay
1188 
module `BASE`MODULE ( d, q, clk, rst);
1189 
`undef MODULE
1190 15 unneback 
parameter depth = 10;
1191 
input d;
1192 
output q;
1193 
input clk, rst;
1194 
 
1195 
reg [1:depth] dffs;
1196 
 
1197 
always @ (posedge clk or posedge rst)
1198 
if (rst)
1199 
    dffs <= {depth{1'b0}};
1200 
else
1201 
    dffs <= {d,dffs[1:depth-1]};
1202 
assign q = dffs[depth];
1203 17 unneback 
endmodule
1204 40 unneback 
`endif
1205 17 unneback 
 
1206 40 unneback 
`ifdef DELAY_EMPTYFLAG
1207 
`define MODULE delay_emptyflag
1208 41 unneback 
module `BASE`MODULE ( d, q, emptyflag, clk, rst);
1209 40 unneback 
`undef MODULE
1210 17 unneback 
parameter depth = 10;
1211 
input d;
1212 
output q, emptyflag;
1213 
input clk, rst;
1214 
 
1215 
reg [1:depth] dffs;
1216 
 
1217 
always @ (posedge clk or posedge rst)
1218 
if (rst)
1219 
    dffs <= {depth{1'b0}};
1220 
else
1221 
    dffs <= {d,dffs[1:depth-1]};
1222 
assign q = dffs[depth];
1223 
assign emptyflag = !(|dffs);
1224 
endmodule
1225 40 unneback 
`endif
1226 75 unneback 
 
1227 94 unneback 
`ifdef PULSE2TOGGLE
1228 98 unneback 
`define MODULE pulse2toggle
1229 
module `BASE`MODULE ( pl, q, clk, rst);
1230 75 unneback 
`undef MODULE
1231 94 unneback 
input pl;
1232 98 unneback 
output reg q;
1233 94 unneback 
input clk, rst;
1234 
always @ (posedge clk or posedge rst)
1235 75 unneback 
if (rst)
1236 94 unneback 
    q <= 1'b0;
1237 75 unneback 
else
1238 94 unneback 
    q <= pl ^ q;
1239 
endmodule
1240 
`endif
1241 75 unneback 
 
1242 94 unneback 
`ifdef TOGGLE2PULSE
1243 98 unneback 
`define MODULE toggle2pulse
1244 94 unneback 
module `BASE`MODULE (d, pl, clk, rst);
1245 97 unneback 
`undef MODULE
1246 94 unneback 
input d;
1247 
output pl;
1248 
input clk, rst;
1249 
reg dff;
1250 
always @ (posedge clk or posedge rst)
1251 
if (rst)
1252 
    dff <= 1'b0;
1253 75 unneback 
else
1254 94 unneback 
    dff <= d;
1255 98 unneback 
assign pl = d ^ dff;
1256 94 unneback 
endmodule
1257 
`endif
1258 75 unneback 
 
1259 94 unneback 
`ifdef SYNCHRONIZER
1260 
`define MODULE synchronizer
1261 
module `BASE`MODULE (d, q, clk, rst);
1262 
`undef MODULE
1263 
input d;
1264 
output reg q;
1265 
output clk, rst;
1266 
reg dff;
1267 
always @ (posedge clk or posedge rst)
1268 
if (rst)
1269 100 unneback 
    {q,dff} <= 2'b00;
1270 75 unneback 
else
1271 100 unneback 
    {q,dff} <= {dff,d};
1272 94 unneback 
endmodule
1273 
`endif
1274 75 unneback 
 
1275 94 unneback 
`ifdef CDC
1276 
`define MODULE cdc
1277 97 unneback 
module `BASE`MODULE ( start_pl, take_it_pl, take_it_grant_pl, got_it_pl, clk_src, rst_src, clk_dst, rst_dst);
1278 94 unneback 
`undef MODULE
1279 
input start_pl;
1280 
output take_it_pl;
1281 
input take_it_grant_pl; // note: connect to take_it_pl to generate automatic ack
1282 
output got_it_pl;
1283 
input clk_src, rst_src;
1284 
input clk_dst, rst_dst;
1285 
wire take_it_tg, take_it_tg_sync;
1286 
wire got_it_tg, got_it_tg_sync;
1287 
// src -> dst
1288 
`define MODULE pulse2toggle
1289 
`BASE`MODULE p2t0 (
1290 
`undef MODULE
1291 
    .pl(start_pl),
1292 
    .q(take_it_tg),
1293 
    .clk(clk_src),
1294 
    .rst(rst_src));
1295 75 unneback 
 
1296 94 unneback 
`define MODULE synchronizer
1297 
`BASE`MODULE sync0 (
1298 
`undef MODULE
1299 
    .d(take_it_tg),
1300 
    .q(take_it_tg_sync),
1301 
    .clk(clk_dst),
1302 
    .rst(rst_dst));
1303 
 
1304 
`define MODULE toggle2pulse
1305 
`BASE`MODULE t2p0 (
1306 
`undef MODULE
1307 100 unneback 
    .d(take_it_tg_sync),
1308 94 unneback 
    .pl(take_it_pl),
1309 
    .clk(clk_dst),
1310 
    .rst(rst_dst));
1311 
 
1312 
// dst -> src
1313 
`define MODULE pulse2toggle
1314 98 unneback 
`BASE`MODULE p2t1 (
1315 94 unneback 
`undef MODULE
1316 
    .pl(take_it_grant_pl),
1317 
    .q(got_it_tg),
1318 
    .clk(clk_dst),
1319 
    .rst(rst_dst));
1320 
 
1321 
`define MODULE synchronizer
1322 
`BASE`MODULE sync1 (
1323 
`undef MODULE
1324 
    .d(got_it_tg),
1325 
    .q(got_it_tg_sync),
1326 
    .clk(clk_src),
1327 
    .rst(rst_src));
1328 
 
1329 
`define MODULE toggle2pulse
1330 
`BASE`MODULE t2p1 (
1331 
`undef MODULE
1332 100 unneback 
    .d(got_it_tg_sync),
1333 94 unneback 
    .pl(got_it_pl),
1334 
    .clk(clk_src),
1335 
    .rst(rst_src));
1336 
 
1337 75 unneback 
endmodule
1338 
`endif
1339 17 unneback 
//////////////////////////////////////////////////////////////////////
1340 6 unneback 
////                                                              ////
1341 18 unneback 
////  Logic functions                                             ////
1342 
////                                                              ////
1343 
////  Description                                                 ////
1344 
////  Logic functions such as multiplexers                        ////
1345 
////                                                              ////
1346 
////                                                              ////
1347 
////  To Do:                                                      ////
1348 
////   -                                                          ////
1349 
////                                                              ////
1350 
////  Author(s):                                                  ////
1351 
////      - Michael Unneback, unneback@opencores.org              ////
1352 
////        ORSoC AB                                              ////
1353 
////                                                              ////
1354 
//////////////////////////////////////////////////////////////////////
1355 
////                                                              ////
1356 
//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////
1357 
////                                                              ////
1358 
//// This source file may be used and distributed without         ////
1359 
//// restriction provided that this copyright statement is not    ////
1360 
//// removed from the file and that any derivative work contains  ////
1361 
//// the original copyright notice and the associated disclaimer. ////
1362 
////                                                              ////
1363 
//// This source file is free software; you can redistribute it   ////
1364 
//// and/or modify it under the terms of the GNU Lesser General   ////
1365 
//// Public License as published by the Free Software Foundation; ////
1366 
//// either version 2.1 of the License, or (at your option) any   ////
1367 
//// later version.                                               ////
1368 
////                                                              ////
1369 
//// This source is distributed in the hope that it will be       ////
1370 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
1371 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
1372 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
1373 
//// details.                                                     ////
1374 
////                                                              ////
1375 
//// You should have received a copy of the GNU Lesser General    ////
1376 
//// Public License along with this source; if not, download it   ////
1377 
//// from http://www.opencores.org/lgpl.shtml                     ////
1378 
////                                                              ////
1379 
//////////////////////////////////////////////////////////////////////
1380 40 unneback 
`ifdef MUX_ANDOR
1381 
`define MODULE mux_andor
1382 
module `BASE`MODULE ( a, sel, dout);
1383 
`undef MODULE
1384 36 unneback 
 
1385 
parameter width = 32;
1386 
parameter nr_of_ports = 4;
1387 
 
1388 
input [nr_of_ports*width-1:0] a;
1389 
input [nr_of_ports-1:0] sel;
1390 
output reg [width-1:0] dout;
1391 
 
1392 38 unneback 
integer i,j;
1393 
 
1394 36 unneback 
always @ (a, sel)
1395 
begin
1396 
    dout = a[width-1:0] & {width{sel[0]}};
1397 42 unneback 
    for (i=1;i<nr_of_ports;i=i+1)
1398 
        for (j=0;j<width;j=j+1)
1399 
            dout[j] = (a[i*width + j] & sel[i]) | dout[j];
1400 36 unneback 
end
1401 
 
1402 
endmodule
1403 40 unneback 
`endif
1404 36 unneback 
 
1405 40 unneback 
`ifdef MUX2_ANDOR
1406 
`define MODULE mux2_andor
1407 
module `BASE`MODULE ( a1, a0, sel, dout);
1408 
`undef MODULE
1409 18 unneback 
 
1410 34 unneback 
parameter width = 32;
1411 35 unneback 
localparam nr_of_ports = 2;
1412 34 unneback 
input [width-1:0] a1, a0;
1413 
input [nr_of_ports-1:0] sel;
1414 
output [width-1:0] dout;
1415 
 
1416 40 unneback 
`define MODULE mux_andor
1417 
`BASE`MODULE
1418 38 unneback 
    # ( .width(width), .nr_of_ports(nr_of_ports))
1419 36 unneback 
    mux0( .a({a1,a0}), .sel(sel), .dout(dout));
1420 40 unneback 
`undef MODULE
1421 
 
1422 34 unneback 
endmodule
1423 40 unneback 
`endif
1424 34 unneback 
 
1425 40 unneback 
`ifdef MUX3_ANDOR
1426 
`define MODULE mux3_andor
1427 
module `BASE`MODULE ( a2, a1, a0, sel, dout);
1428 
`undef MODULE
1429 34 unneback 
 
1430 
parameter width = 32;
1431 35 unneback 
localparam nr_of_ports = 3;
1432 34 unneback 
input [width-1:0] a2, a1, a0;
1433 
input [nr_of_ports-1:0] sel;
1434 
output [width-1:0] dout;
1435 
 
1436 40 unneback 
`define MODULE mux_andor
1437 
`BASE`MODULE
1438 38 unneback 
    # ( .width(width), .nr_of_ports(nr_of_ports))
1439 36 unneback 
    mux0( .a({a2,a1,a0}), .sel(sel), .dout(dout));
1440 40 unneback 
`undef MODULE
1441 34 unneback 
endmodule
1442 40 unneback 
`endif
1443 34 unneback 
 
1444 40 unneback 
`ifdef MUX4_ANDOR
1445 
`define MODULE mux4_andor
1446 
module `BASE`MODULE ( a3, a2, a1, a0, sel, dout);
1447 
`undef MODULE
1448 18 unneback 
 
1449 
parameter width = 32;
1450 35 unneback 
localparam nr_of_ports = 4;
1451 18 unneback 
input [width-1:0] a3, a2, a1, a0;
1452 
input [nr_of_ports-1:0] sel;
1453 22 unneback 
output [width-1:0] dout;
1454 18 unneback 
 
1455 40 unneback 
`define MODULE mux_andor
1456 
`BASE`MODULE
1457 38 unneback 
    # ( .width(width), .nr_of_ports(nr_of_ports))
1458 36 unneback 
    mux0( .a({a3,a2,a1,a0}), .sel(sel), .dout(dout));
1459 40 unneback 
`undef MODULE
1460 18 unneback 
 
1461 
endmodule
1462 40 unneback 
`endif
1463 18 unneback 
 
1464 40 unneback 
`ifdef MUX5_ANDOR
1465 
`define MODULE mux5_andor
1466 
module `BASE`MODULE ( a4, a3, a2, a1, a0, sel, dout);
1467 
`undef MODULE
1468 18 unneback 
 
1469 
parameter width = 32;
1470 35 unneback 
localparam nr_of_ports = 5;
1471 18 unneback 
input [width-1:0] a4, a3, a2, a1, a0;
1472 
input [nr_of_ports-1:0] sel;
1473 22 unneback 
output [width-1:0] dout;
1474 18 unneback 
 
1475 40 unneback 
`define MODULE mux_andor
1476 
`BASE`MODULE
1477 38 unneback 
    # ( .width(width), .nr_of_ports(nr_of_ports))
1478 36 unneback 
    mux0( .a({a4,a3,a2,a1,a0}), .sel(sel), .dout(dout));
1479 40 unneback 
`undef MODULE
1480 18 unneback 
 
1481 
endmodule
1482 40 unneback 
`endif
1483 18 unneback 
 
1484 40 unneback 
`ifdef MUX6_ANDOR
1485 
`define MODULE mux6_andor
1486 
module `BASE`MODULE ( a5, a4, a3, a2, a1, a0, sel, dout);
1487 
`undef MODULE
1488 18 unneback 
 
1489 
parameter width = 32;
1490 35 unneback 
localparam nr_of_ports = 6;
1491 18 unneback 
input [width-1:0] a5, a4, a3, a2, a1, a0;
1492 
input [nr_of_ports-1:0] sel;
1493 22 unneback 
output [width-1:0] dout;
1494 18 unneback 
 
1495 40 unneback 
`define MODULE mux_andor
1496 
`BASE`MODULE
1497 38 unneback 
    # ( .width(width), .nr_of_ports(nr_of_ports))
1498 36 unneback 
    mux0( .a({a5,a4,a3,a2,a1,a0}), .sel(sel), .dout(dout));
1499 40 unneback 
`undef MODULE
1500 18 unneback 
 
1501 
endmodule
1502 40 unneback 
`endif
1503 43 unneback 
 
1504 
`ifdef PARITY
1505 
 
1506 
`define MODULE parity_generate
1507 
module `BASE`MODULE (data, parity);
1508 
`undef MODULE
1509 
parameter word_size = 32;
1510 
parameter chunk_size = 8;
1511 
parameter parity_type = 1'b0; // 0 - even, 1 - odd parity
1512 
input [word_size-1:0] data;
1513 
output reg [word_size/chunk_size-1:0] parity;
1514 
integer i,j;
1515 
always @ (data)
1516 
for (i=0;i<word_size/chunk_size;i=i+1) begin
1517 
    parity[i] = parity_type;
1518 
    for (j=0;j<chunk_size;j=j+1) begin
1519 46 unneback 
        parity[i] = data[i*chunk_size+j] ^ parity[i];
1520 43 unneback 
    end
1521 
end
1522 
endmodule
1523 
 
1524 
`define MODULE parity_check
1525 
module `BASE`MODULE( data, parity, parity_error);
1526 
`undef MODULE
1527 
parameter word_size = 32;
1528 
parameter chunk_size = 8;
1529 
parameter parity_type = 1'b0; // 0 - even, 1 - odd parity
1530 
input [word_size-1:0] data;
1531 
input [word_size/chunk_size-1:0] parity;
1532 
output parity_error;
1533 44 unneback 
reg [word_size/chunk_size-1:0] error_flag;
1534 43 unneback 
integer i,j;
1535 
always @ (data or parity)
1536 
for (i=0;i<word_size/chunk_size;i=i+1) begin
1537 
    error_flag[i] = parity[i] ^ parity_type;
1538 
    for (j=0;j<chunk_size;j=j+1) begin
1539 46 unneback 
        error_flag[i] = data[i*chunk_size+j] ^ error_flag[i];
1540 43 unneback 
    end
1541 
end
1542 
assign parity_error = |error_flag;
1543 
endmodule
1544 
 
1545 44 unneback 
`endif//////////////////////////////////////////////////////////////////////
1546 
////                                                              ////
1547 
////  IO functions                                                ////
1548 
////                                                              ////
1549 
////  Description                                                 ////
1550 
////  IO functions such as IOB flip-flops                         ////
1551 
////                                                              ////
1552 
////                                                              ////
1553 
////  To Do:                                                      ////
1554 
////   -                                                          ////
1555 
////                                                              ////
1556 
////  Author(s):                                                  ////
1557 
////      - Michael Unneback, unneback@opencores.org              ////
1558 
////        ORSoC AB                                              ////
1559 
////                                                              ////
1560 18 unneback 
//////////////////////////////////////////////////////////////////////
1561 
////                                                              ////
1562 44 unneback 
//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////
1563 
////                                                              ////
1564 
//// This source file may be used and distributed without         ////
1565 
//// restriction provided that this copyright statement is not    ////
1566 
//// removed from the file and that any derivative work contains  ////
1567 
//// the original copyright notice and the associated disclaimer. ////
1568 
////                                                              ////
1569 
//// This source file is free software; you can redistribute it   ////
1570 
//// and/or modify it under the terms of the GNU Lesser General   ////
1571 
//// Public License as published by the Free Software Foundation; ////
1572 
//// either version 2.1 of the License, or (at your option) any   ////
1573 
//// later version.                                               ////
1574 
////                                                              ////
1575 
//// This source is distributed in the hope that it will be       ////
1576 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
1577 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
1578 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
1579 
//// details.                                                     ////
1580 
////                                                              ////
1581 
//// You should have received a copy of the GNU Lesser General    ////
1582 
//// Public License along with this source; if not, download it   ////
1583 
//// from http://www.opencores.org/lgpl.shtml                     ////
1584 
////                                                              ////
1585 
//////////////////////////////////////////////////////////////////////
1586 45 unneback 
`timescale 1ns/1ns
1587 44 unneback 
`ifdef O_DFF
1588 
`define MODULE o_dff
1589 
module `BASE`MODULE (d_i, o_pad, clk, rst);
1590 
`undef MODULE
1591 
parameter width = 1;
1592 45 unneback 
parameter reset_value = {width{1'b0}};
1593 
input  [width-1:0]  d_i;
1594 44 unneback 
output [width-1:0] o_pad;
1595 
input clk, rst;
1596 
wire [width-1:0] d_i_int `SYN_KEEP;
1597 45 unneback 
reg  [width-1:0] o_pad_int;
1598 44 unneback 
assign d_i_int = d_i;
1599 
genvar i;
1600 45 unneback 
generate
1601 44 unneback 
for (i=0;i<width;i=i+1) begin
1602 
    always @ (posedge clk or posedge rst)
1603 
    if (rst)
1604 45 unneback 
        o_pad_int[i] <= reset_value[i];
1605 44 unneback 
    else
1606 45 unneback 
        o_pad_int[i] <= d_i_int[i];
1607 
    assign #1 o_pad[i] = o_pad_int[i];
1608 44 unneback 
end
1609 
endgenerate
1610 
endmodule
1611 
`endif
1612 
 
1613 45 unneback 
`timescale 1ns/1ns
1614 44 unneback 
`ifdef IO_DFF_OE
1615 
`define MODULE io_dff_oe
1616 
module `BASE`MODULE ( d_i, d_o, oe, io_pad, clk, rst);
1617 
`undef MODULE
1618 
parameter width = 1;
1619 
input  [width-1:0] d_o;
1620 
output reg [width-1:0] d_i;
1621 
input oe;
1622 
inout [width-1:0] io_pad;
1623 
input clk, rst;
1624 
wire [width-1:0] oe_d `SYN_KEEP;
1625 
reg [width-1:0] oe_q;
1626 
reg [width-1:0] d_o_q;
1627 
assign oe_d = {width{oe}};
1628 
genvar i;
1629 
generate
1630 
for (i=0;i<width;i=i+1) begin
1631 
    always @ (posedge clk or posedge rst)
1632 
    if (rst)
1633 
        oe_q[i] <= 1'b0;
1634 
    else
1635 
        oe_q[i] <= oe_d[i];
1636 
    always @ (posedge clk or posedge rst)
1637 
    if (rst)
1638 
        d_o_q[i] <= 1'b0;
1639 
    else
1640 
        d_o_q[i] <= d_o[i];
1641 
    always @ (posedge clk or posedge rst)
1642 
    if (rst)
1643 
        d_i[i] <= 1'b0;
1644 
    else
1645 
        d_i[i] <= io_pad[i];
1646 45 unneback 
    assign #1 io_pad[i] = (oe_q[i]) ? d_o_q[i] : 1'bz;
1647 44 unneback 
end
1648 
endgenerate
1649 
endmodule
1650 
`endif
1651 
`ifdef CNT_BIN
1652 
//////////////////////////////////////////////////////////////////////
1653 
////                                                              ////
1654 6 unneback 
////  Versatile counter                                           ////
1655 
////                                                              ////
1656 
////  Description                                                 ////
1657 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
1658 
////  counter                                                     ////
1659 
////                                                              ////
1660 
////  To Do:                                                      ////
1661 
////   - add LFSR with more taps                                  ////
1662 
////                                                              ////
1663 
////  Author(s):                                                  ////
1664 
////      - Michael Unneback, unneback@opencores.org              ////
1665 
////        ORSoC AB                                              ////
1666 
////                                                              ////
1667 
//////////////////////////////////////////////////////////////////////
1668 
////                                                              ////
1669 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
1670 
////                                                              ////
1671 
//// This source file may be used and distributed without         ////
1672 
//// restriction provided that this copyright statement is not    ////
1673 
//// removed from the file and that any derivative work contains  ////
1674 
//// the original copyright notice and the associated disclaimer. ////
1675 
////                                                              ////
1676 
//// This source file is free software; you can redistribute it   ////
1677 
//// and/or modify it under the terms of the GNU Lesser General   ////
1678 
//// Public License as published by the Free Software Foundation; ////
1679 
//// either version 2.1 of the License, or (at your option) any   ////
1680 
//// later version.                                               ////
1681 
////                                                              ////
1682 
//// This source is distributed in the hope that it will be       ////
1683 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
1684 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
1685 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
1686 
//// details.                                                     ////
1687 
////                                                              ////
1688 
//// You should have received a copy of the GNU Lesser General    ////
1689 
//// Public License along with this source; if not, download it   ////
1690 
//// from http://www.opencores.org/lgpl.shtml                     ////
1691 
////                                                              ////
1692 
//////////////////////////////////////////////////////////////////////
1693 
 
1694 
// binary counter
1695 22 unneback 
 
1696 40 unneback 
`define MODULE cnt_bin
1697 
module `BASE`MODULE (
1698 
`undef MODULE
1699 
 q, rst, clk);
1700 
 
1701 22 unneback 
   parameter length = 4;
1702 
   output [length:1] q;
1703 
   input rst;
1704 
   input clk;
1705 
 
1706 
   parameter clear_value = 0;
1707 
   parameter set_value = 1;
1708 
   parameter wrap_value = 0;
1709 
   parameter level1_value = 15;
1710 
 
1711 
   reg  [length:1] qi;
1712 
   wire [length:1] q_next;
1713 
   assign q_next = qi + {{length-1{1'b0}},1'b1};
1714 
 
1715 
   always @ (posedge clk or posedge rst)
1716 
     if (rst)
1717 
       qi <= {length{1'b0}};
1718 
     else
1719 
       qi <= q_next;
1720 
 
1721 
   assign q = qi;
1722 
 
1723 
endmodule
1724 40 unneback 
`endif
1725 
`ifdef CNT_BIN_CLEAR
1726 22 unneback 
//////////////////////////////////////////////////////////////////////
1727 
////                                                              ////
1728 
////  Versatile counter                                           ////
1729 
////                                                              ////
1730 
////  Description                                                 ////
1731 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
1732 
////  counter                                                     ////
1733 
////                                                              ////
1734 
////  To Do:                                                      ////
1735 
////   - add LFSR with more taps                                  ////
1736 
////                                                              ////
1737 
////  Author(s):                                                  ////
1738 
////      - Michael Unneback, unneback@opencores.org              ////
1739 
////        ORSoC AB                                              ////
1740 
////                                                              ////
1741 
//////////////////////////////////////////////////////////////////////
1742 
////                                                              ////
1743 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
1744 
////                                                              ////
1745 
//// This source file may be used and distributed without         ////
1746 
//// restriction provided that this copyright statement is not    ////
1747 
//// removed from the file and that any derivative work contains  ////
1748 
//// the original copyright notice and the associated disclaimer. ////
1749 
////                                                              ////
1750 
//// This source file is free software; you can redistribute it   ////
1751 
//// and/or modify it under the terms of the GNU Lesser General   ////
1752 
//// Public License as published by the Free Software Foundation; ////
1753 
//// either version 2.1 of the License, or (at your option) any   ////
1754 
//// later version.                                               ////
1755 
////                                                              ////
1756 
//// This source is distributed in the hope that it will be       ////
1757 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
1758 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
1759 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
1760 
//// details.                                                     ////
1761 
////                                                              ////
1762 
//// You should have received a copy of the GNU Lesser General    ////
1763 
//// Public License along with this source; if not, download it   ////
1764 
//// from http://www.opencores.org/lgpl.shtml                     ////
1765 
////                                                              ////
1766 
//////////////////////////////////////////////////////////////////////
1767 
 
1768 
// binary counter
1769 
 
1770 40 unneback 
`define MODULE cnt_bin_clear
1771 
module `BASE`MODULE (
1772 
`undef MODULE
1773 
 clear, q, rst, clk);
1774 
 
1775 22 unneback 
   parameter length = 4;
1776 
   input clear;
1777 
   output [length:1] q;
1778 
   input rst;
1779 
   input clk;
1780 
 
1781 
   parameter clear_value = 0;
1782 
   parameter set_value = 1;
1783 
   parameter wrap_value = 0;
1784 
   parameter level1_value = 15;
1785 
 
1786 
   reg  [length:1] qi;
1787 
   wire [length:1] q_next;
1788 
   assign q_next =  clear ? {length{1'b0}} :qi + {{length-1{1'b0}},1'b1};
1789 
 
1790 
   always @ (posedge clk or posedge rst)
1791 
     if (rst)
1792 
       qi <= {length{1'b0}};
1793 
     else
1794 
       qi <= q_next;
1795 
 
1796 
   assign q = qi;
1797 
 
1798 
endmodule
1799 40 unneback 
`endif
1800 
`ifdef CNT_BIN_CE
1801 22 unneback 
//////////////////////////////////////////////////////////////////////
1802 
////                                                              ////
1803 
////  Versatile counter                                           ////
1804 
////                                                              ////
1805 
////  Description                                                 ////
1806 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
1807 
////  counter                                                     ////
1808 
////                                                              ////
1809 
////  To Do:                                                      ////
1810 
////   - add LFSR with more taps                                  ////
1811 
////                                                              ////
1812 
////  Author(s):                                                  ////
1813 
////      - Michael Unneback, unneback@opencores.org              ////
1814 
////        ORSoC AB                                              ////
1815 
////                                                              ////
1816 
//////////////////////////////////////////////////////////////////////
1817 
////                                                              ////
1818 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
1819 
////                                                              ////
1820 
//// This source file may be used and distributed without         ////
1821 
//// restriction provided that this copyright statement is not    ////
1822 
//// removed from the file and that any derivative work contains  ////
1823 
//// the original copyright notice and the associated disclaimer. ////
1824 
////                                                              ////
1825 
//// This source file is free software; you can redistribute it   ////
1826 
//// and/or modify it under the terms of the GNU Lesser General   ////
1827 
//// Public License as published by the Free Software Foundation; ////
1828 
//// either version 2.1 of the License, or (at your option) any   ////
1829 
//// later version.                                               ////
1830 
////                                                              ////
1831 
//// This source is distributed in the hope that it will be       ////
1832 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
1833 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
1834 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
1835 
//// details.                                                     ////
1836 
////                                                              ////
1837 
//// You should have received a copy of the GNU Lesser General    ////
1838 
//// Public License along with this source; if not, download it   ////
1839 
//// from http://www.opencores.org/lgpl.shtml                     ////
1840 
////                                                              ////
1841 
//////////////////////////////////////////////////////////////////////
1842 
 
1843 
// binary counter
1844 6 unneback 
 
1845 40 unneback 
`define MODULE cnt_bin_ce
1846 
module `BASE`MODULE (
1847 
`undef MODULE
1848 
 cke, q, rst, clk);
1849 
 
1850 6 unneback 
   parameter length = 4;
1851 
   input cke;
1852 
   output [length:1] q;
1853 
   input rst;
1854 
   input clk;
1855 
 
1856 
   parameter clear_value = 0;
1857 
   parameter set_value = 1;
1858 
   parameter wrap_value = 0;
1859 
   parameter level1_value = 15;
1860 
 
1861 
   reg  [length:1] qi;
1862 
   wire [length:1] q_next;
1863 
   assign q_next = qi + {{length-1{1'b0}},1'b1};
1864 
 
1865 
   always @ (posedge clk or posedge rst)
1866 
     if (rst)
1867 
       qi <= {length{1'b0}};
1868 
     else
1869 
     if (cke)
1870 
       qi <= q_next;
1871 
 
1872 
   assign q = qi;
1873 
 
1874 
endmodule
1875 40 unneback 
`endif
1876 
`ifdef CNT_BIN_CE_CLEAR
1877 6 unneback 
//////////////////////////////////////////////////////////////////////
1878 
////                                                              ////
1879 
////  Versatile counter                                           ////
1880 
////                                                              ////
1881 
////  Description                                                 ////
1882 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
1883 
////  counter                                                     ////
1884 
////                                                              ////
1885 
////  To Do:                                                      ////
1886 
////   - add LFSR with more taps                                  ////
1887 
////                                                              ////
1888 
////  Author(s):                                                  ////
1889 
////      - Michael Unneback, unneback@opencores.org              ////
1890 
////        ORSoC AB                                              ////
1891 
////                                                              ////
1892 
//////////////////////////////////////////////////////////////////////
1893 
////                                                              ////
1894 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
1895 
////                                                              ////
1896 
//// This source file may be used and distributed without         ////
1897 
//// restriction provided that this copyright statement is not    ////
1898 
//// removed from the file and that any derivative work contains  ////
1899 
//// the original copyright notice and the associated disclaimer. ////
1900 
////                                                              ////
1901 
//// This source file is free software; you can redistribute it   ////
1902 
//// and/or modify it under the terms of the GNU Lesser General   ////
1903 
//// Public License as published by the Free Software Foundation; ////
1904 
//// either version 2.1 of the License, or (at your option) any   ////
1905 
//// later version.                                               ////
1906 
////                                                              ////
1907 
//// This source is distributed in the hope that it will be       ////
1908 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
1909 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
1910 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
1911 
//// details.                                                     ////
1912 
////                                                              ////
1913 
//// You should have received a copy of the GNU Lesser General    ////
1914 
//// Public License along with this source; if not, download it   ////
1915 
//// from http://www.opencores.org/lgpl.shtml                     ////
1916 
////                                                              ////
1917 
//////////////////////////////////////////////////////////////////////
1918 
 
1919 
// binary counter
1920 
 
1921 40 unneback 
`define MODULE cnt_bin_ce_clear
1922 
module `BASE`MODULE (
1923 
`undef MODULE
1924 
 clear, cke, q, rst, clk);
1925 
 
1926 6 unneback 
   parameter length = 4;
1927 
   input clear;
1928 
   input cke;
1929 
   output [length:1] q;
1930 
   input rst;
1931 
   input clk;
1932 
 
1933 
   parameter clear_value = 0;
1934 
   parameter set_value = 1;
1935 
   parameter wrap_value = 0;
1936 
   parameter level1_value = 15;
1937 
 
1938 
   reg  [length:1] qi;
1939 
   wire [length:1] q_next;
1940 
   assign q_next =  clear ? {length{1'b0}} :qi + {{length-1{1'b0}},1'b1};
1941 
 
1942 
   always @ (posedge clk or posedge rst)
1943 
     if (rst)
1944 
       qi <= {length{1'b0}};
1945 
     else
1946 
     if (cke)
1947 
       qi <= q_next;
1948 
 
1949 
   assign q = qi;
1950 
 
1951 
endmodule
1952 40 unneback 
`endif
1953 
`ifdef CNT_BIN_CE_CLEAR_L1_L2
1954 6 unneback 
//////////////////////////////////////////////////////////////////////
1955 
////                                                              ////
1956 
////  Versatile counter                                           ////
1957 
////                                                              ////
1958 
////  Description                                                 ////
1959 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
1960 
////  counter                                                     ////
1961 
////                                                              ////
1962 
////  To Do:                                                      ////
1963 
////   - add LFSR with more taps                                  ////
1964 
////                                                              ////
1965 
////  Author(s):                                                  ////
1966 
////      - Michael Unneback, unneback@opencores.org              ////
1967 
////        ORSoC AB                                              ////
1968 
////                                                              ////
1969 
//////////////////////////////////////////////////////////////////////
1970 
////                                                              ////
1971 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
1972 
////                                                              ////
1973 
//// This source file may be used and distributed without         ////
1974 
//// restriction provided that this copyright statement is not    ////
1975 
//// removed from the file and that any derivative work contains  ////
1976 
//// the original copyright notice and the associated disclaimer. ////
1977 
////                                                              ////
1978 
//// This source file is free software; you can redistribute it   ////
1979 
//// and/or modify it under the terms of the GNU Lesser General   ////
1980 
//// Public License as published by the Free Software Foundation; ////
1981 
//// either version 2.1 of the License, or (at your option) any   ////
1982 
//// later version.                                               ////
1983 
////                                                              ////
1984 
//// This source is distributed in the hope that it will be       ////
1985 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
1986 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
1987 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
1988 
//// details.                                                     ////
1989 
////                                                              ////
1990 
//// You should have received a copy of the GNU Lesser General    ////
1991 
//// Public License along with this source; if not, download it   ////
1992 
//// from http://www.opencores.org/lgpl.shtml                     ////
1993 
////                                                              ////
1994 
//////////////////////////////////////////////////////////////////////
1995 
 
1996 
// binary counter
1997 29 unneback 
 
1998 40 unneback 
`define MODULE cnt_bin_ce_clear_l1_l2
1999 
module `BASE`MODULE (
2000 
`undef MODULE
2001 
 clear, cke, q, level1, level2, rst, clk);
2002 
 
2003 29 unneback 
   parameter length = 4;
2004 
   input clear;
2005 
   input cke;
2006 
   output [length:1] q;
2007 
   output reg level1;
2008 
   output reg level2;
2009 
   input rst;
2010 
   input clk;
2011 
 
2012 
   parameter clear_value = 0;
2013 
   parameter set_value = 1;
2014 30 unneback 
   parameter wrap_value = 15;
2015 
   parameter level1_value = 8;
2016 
   parameter level2_value = 15;
2017 29 unneback 
 
2018 
   wire rew;
2019 30 unneback 
   assign rew = 1'b0;
2020 29 unneback 
   reg  [length:1] qi;
2021 
   wire [length:1] q_next;
2022 
   assign q_next =  clear ? {length{1'b0}} :qi + {{length-1{1'b0}},1'b1};
2023 
 
2024 
   always @ (posedge clk or posedge rst)
2025 
     if (rst)
2026 
       qi <= {length{1'b0}};
2027 
     else
2028 
     if (cke)
2029 
       qi <= q_next;
2030 
 
2031 
   assign q = qi;
2032 
 
2033 
 
2034 
    always @ (posedge clk or posedge rst)
2035 
    if (rst)
2036 
        level1 <= 1'b0;
2037 
    else
2038 
    if (cke)
2039 
    if (clear)
2040 
        level1 <= 1'b0;
2041 
    else if (q_next == level1_value)
2042 
        level1 <= 1'b1;
2043 
    else if (qi == level1_value & rew)
2044 
        level1 <= 1'b0;
2045 
 
2046 
    always @ (posedge clk or posedge rst)
2047 
    if (rst)
2048 
        level2 <= 1'b0;
2049 
    else
2050 
    if (cke)
2051 
    if (clear)
2052 
        level2 <= 1'b0;
2053 
    else if (q_next == level2_value)
2054 
        level2 <= 1'b1;
2055 
    else if (qi == level2_value & rew)
2056 
        level2 <= 1'b0;
2057 
endmodule
2058 40 unneback 
`endif
2059 
`ifdef CNT_BIN_CE_CLEAR_SET_REW
2060 29 unneback 
//////////////////////////////////////////////////////////////////////
2061 
////                                                              ////
2062 
////  Versatile counter                                           ////
2063 
////                                                              ////
2064 
////  Description                                                 ////
2065 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2066 
////  counter                                                     ////
2067 
////                                                              ////
2068 
////  To Do:                                                      ////
2069 
////   - add LFSR with more taps                                  ////
2070 
////                                                              ////
2071 
////  Author(s):                                                  ////
2072 
////      - Michael Unneback, unneback@opencores.org              ////
2073 
////        ORSoC AB                                              ////
2074 
////                                                              ////
2075 
//////////////////////////////////////////////////////////////////////
2076 
////                                                              ////
2077 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2078 
////                                                              ////
2079 
//// This source file may be used and distributed without         ////
2080 
//// restriction provided that this copyright statement is not    ////
2081 
//// removed from the file and that any derivative work contains  ////
2082 
//// the original copyright notice and the associated disclaimer. ////
2083 
////                                                              ////
2084 
//// This source file is free software; you can redistribute it   ////
2085 
//// and/or modify it under the terms of the GNU Lesser General   ////
2086 
//// Public License as published by the Free Software Foundation; ////
2087 
//// either version 2.1 of the License, or (at your option) any   ////
2088 
//// later version.                                               ////
2089 
////                                                              ////
2090 
//// This source is distributed in the hope that it will be       ////
2091 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2092 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2093 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2094 
//// details.                                                     ////
2095 
////                                                              ////
2096 
//// You should have received a copy of the GNU Lesser General    ////
2097 
//// Public License along with this source; if not, download it   ////
2098 
//// from http://www.opencores.org/lgpl.shtml                     ////
2099 
////                                                              ////
2100 
//////////////////////////////////////////////////////////////////////
2101 
 
2102 
// binary counter
2103 6 unneback 
 
2104 40 unneback 
`define MODULE cnt_bin_ce_clear_set_rew
2105 
module `BASE`MODULE (
2106 
`undef MODULE
2107 
 clear, set, cke, rew, q, rst, clk);
2108 
 
2109 6 unneback 
   parameter length = 4;
2110 
   input clear;
2111 
   input set;
2112 
   input cke;
2113 
   input rew;
2114 
   output [length:1] q;
2115 
   input rst;
2116 
   input clk;
2117 
 
2118 
   parameter clear_value = 0;
2119 
   parameter set_value = 1;
2120 
   parameter wrap_value = 0;
2121 
   parameter level1_value = 15;
2122 
 
2123 
   reg  [length:1] qi;
2124 
   wire  [length:1] q_next, q_next_fw, q_next_rew;
2125 
   assign q_next_fw  =  clear ? {length{1'b0}} : set ? set_value :qi + {{length-1{1'b0}},1'b1};
2126 
   assign q_next_rew =  clear ? clear_value : set ? set_value :qi - {{length-1{1'b0}},1'b1};
2127 
   assign q_next = rew ? q_next_rew : q_next_fw;
2128 
 
2129 
   always @ (posedge clk or posedge rst)
2130 
     if (rst)
2131 
       qi <= {length{1'b0}};
2132 
     else
2133 
     if (cke)
2134 
       qi <= q_next;
2135 
 
2136 
   assign q = qi;
2137 
 
2138 
endmodule
2139 40 unneback 
`endif
2140 
`ifdef CNT_BIN_CE_REW_L1
2141 6 unneback 
//////////////////////////////////////////////////////////////////////
2142 
////                                                              ////
2143 
////  Versatile counter                                           ////
2144 
////                                                              ////
2145 
////  Description                                                 ////
2146 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2147 
////  counter                                                     ////
2148 
////                                                              ////
2149 
////  To Do:                                                      ////
2150 
////   - add LFSR with more taps                                  ////
2151 
////                                                              ////
2152 
////  Author(s):                                                  ////
2153 
////      - Michael Unneback, unneback@opencores.org              ////
2154 
////        ORSoC AB                                              ////
2155 
////                                                              ////
2156 
//////////////////////////////////////////////////////////////////////
2157 
////                                                              ////
2158 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2159 
////                                                              ////
2160 
//// This source file may be used and distributed without         ////
2161 
//// restriction provided that this copyright statement is not    ////
2162 
//// removed from the file and that any derivative work contains  ////
2163 
//// the original copyright notice and the associated disclaimer. ////
2164 
////                                                              ////
2165 
//// This source file is free software; you can redistribute it   ////
2166 
//// and/or modify it under the terms of the GNU Lesser General   ////
2167 
//// Public License as published by the Free Software Foundation; ////
2168 
//// either version 2.1 of the License, or (at your option) any   ////
2169 
//// later version.                                               ////
2170 
////                                                              ////
2171 
//// This source is distributed in the hope that it will be       ////
2172 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2173 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2174 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2175 
//// details.                                                     ////
2176 
////                                                              ////
2177 
//// You should have received a copy of the GNU Lesser General    ////
2178 
//// Public License along with this source; if not, download it   ////
2179 
//// from http://www.opencores.org/lgpl.shtml                     ////
2180 
////                                                              ////
2181 
//////////////////////////////////////////////////////////////////////
2182 
 
2183 
// binary counter
2184 
 
2185 40 unneback 
`define MODULE cnt_bin_ce_rew_l1
2186 
module `BASE`MODULE (
2187 
`undef MODULE
2188 
 cke, rew, level1, rst, clk);
2189 
 
2190 6 unneback 
   parameter length = 4;
2191 
   input cke;
2192 
   input rew;
2193 
   output reg level1;
2194 
   input rst;
2195 
   input clk;
2196 
 
2197 
   parameter clear_value = 0;
2198 
   parameter set_value = 1;
2199 
   parameter wrap_value = 1;
2200 
   parameter level1_value = 15;
2201 
 
2202 29 unneback 
   wire clear;
2203 30 unneback 
   assign clear = 1'b0;
2204 6 unneback 
   reg  [length:1] qi;
2205 
   wire  [length:1] q_next, q_next_fw, q_next_rew;
2206 
   assign q_next_fw  = qi + {{length-1{1'b0}},1'b1};
2207 
   assign q_next_rew = qi - {{length-1{1'b0}},1'b1};
2208 
   assign q_next = rew ? q_next_rew : q_next_fw;
2209 
 
2210 
   always @ (posedge clk or posedge rst)
2211 
     if (rst)
2212 
       qi <= {length{1'b0}};
2213 
     else
2214 
     if (cke)
2215 
       qi <= q_next;
2216 
 
2217 
 
2218 
 
2219 
    always @ (posedge clk or posedge rst)
2220 
    if (rst)
2221 
        level1 <= 1'b0;
2222 
    else
2223 
    if (cke)
2224 29 unneback 
    if (clear)
2225 
        level1 <= 1'b0;
2226 
    else if (q_next == level1_value)
2227 6 unneback 
        level1 <= 1'b1;
2228 
    else if (qi == level1_value & rew)
2229 
        level1 <= 1'b0;
2230 
endmodule
2231 40 unneback 
`endif
2232 
`ifdef CNT_BIN_CE_REW_ZQ_L1
2233 6 unneback 
//////////////////////////////////////////////////////////////////////
2234 
////                                                              ////
2235 
////  Versatile counter                                           ////
2236 
////                                                              ////
2237 
////  Description                                                 ////
2238 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2239 
////  counter                                                     ////
2240 
////                                                              ////
2241 
////  To Do:                                                      ////
2242 
////   - add LFSR with more taps                                  ////
2243 
////                                                              ////
2244 
////  Author(s):                                                  ////
2245 
////      - Michael Unneback, unneback@opencores.org              ////
2246 
////        ORSoC AB                                              ////
2247 
////                                                              ////
2248 
//////////////////////////////////////////////////////////////////////
2249 
////                                                              ////
2250 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2251 
////                                                              ////
2252 
//// This source file may be used and distributed without         ////
2253 
//// restriction provided that this copyright statement is not    ////
2254 
//// removed from the file and that any derivative work contains  ////
2255 
//// the original copyright notice and the associated disclaimer. ////
2256 
////                                                              ////
2257 
//// This source file is free software; you can redistribute it   ////
2258 
//// and/or modify it under the terms of the GNU Lesser General   ////
2259 
//// Public License as published by the Free Software Foundation; ////
2260 
//// either version 2.1 of the License, or (at your option) any   ////
2261 
//// later version.                                               ////
2262 
////                                                              ////
2263 
//// This source is distributed in the hope that it will be       ////
2264 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2265 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2266 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2267 
//// details.                                                     ////
2268 
////                                                              ////
2269 
//// You should have received a copy of the GNU Lesser General    ////
2270 
//// Public License along with this source; if not, download it   ////
2271 
//// from http://www.opencores.org/lgpl.shtml                     ////
2272 
////                                                              ////
2273 
//////////////////////////////////////////////////////////////////////
2274 
 
2275 25 unneback 
// binary counter
2276 
 
2277 40 unneback 
`define MODULE cnt_bin_ce_rew_zq_l1
2278 
module `BASE`MODULE (
2279 
`undef MODULE
2280 
 cke, rew, zq, level1, rst, clk);
2281 
 
2282 25 unneback 
   parameter length = 4;
2283 
   input cke;
2284 
   input rew;
2285 
   output reg zq;
2286 
   output reg level1;
2287 
   input rst;
2288 
   input clk;
2289 
 
2290 
   parameter clear_value = 0;
2291 
   parameter set_value = 1;
2292 
   parameter wrap_value = 1;
2293 
   parameter level1_value = 15;
2294 
 
2295 29 unneback 
   wire clear;
2296 30 unneback 
   assign clear = 1'b0;
2297 25 unneback 
   reg  [length:1] qi;
2298 
   wire  [length:1] q_next, q_next_fw, q_next_rew;
2299 
   assign q_next_fw  = qi + {{length-1{1'b0}},1'b1};
2300 
   assign q_next_rew = qi - {{length-1{1'b0}},1'b1};
2301 
   assign q_next = rew ? q_next_rew : q_next_fw;
2302 
 
2303 
   always @ (posedge clk or posedge rst)
2304 
     if (rst)
2305 
       qi <= {length{1'b0}};
2306 
     else
2307 
     if (cke)
2308 
       qi <= q_next;
2309 
 
2310 
 
2311 
 
2312 
   always @ (posedge clk or posedge rst)
2313 
     if (rst)
2314 
       zq <= 1'b1;
2315 
     else
2316 
     if (cke)
2317 
       zq <= q_next == {length{1'b0}};
2318 
 
2319 
    always @ (posedge clk or posedge rst)
2320 
    if (rst)
2321 
        level1 <= 1'b0;
2322 
    else
2323 
    if (cke)
2324 29 unneback 
    if (clear)
2325 
        level1 <= 1'b0;
2326 
    else if (q_next == level1_value)
2327 25 unneback 
        level1 <= 1'b1;
2328 
    else if (qi == level1_value & rew)
2329 
        level1 <= 1'b0;
2330 
endmodule
2331 40 unneback 
`endif
2332 
`ifdef CNT_BIN_CE_REW_Q_ZQ_L1
2333 25 unneback 
//////////////////////////////////////////////////////////////////////
2334 
////                                                              ////
2335 
////  Versatile counter                                           ////
2336 
////                                                              ////
2337 
////  Description                                                 ////
2338 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2339 
////  counter                                                     ////
2340 
////                                                              ////
2341 
////  To Do:                                                      ////
2342 
////   - add LFSR with more taps                                  ////
2343 
////                                                              ////
2344 
////  Author(s):                                                  ////
2345 
////      - Michael Unneback, unneback@opencores.org              ////
2346 
////        ORSoC AB                                              ////
2347 
////                                                              ////
2348 
//////////////////////////////////////////////////////////////////////
2349 
////                                                              ////
2350 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2351 
////                                                              ////
2352 
//// This source file may be used and distributed without         ////
2353 
//// restriction provided that this copyright statement is not    ////
2354 
//// removed from the file and that any derivative work contains  ////
2355 
//// the original copyright notice and the associated disclaimer. ////
2356 
////                                                              ////
2357 
//// This source file is free software; you can redistribute it   ////
2358 
//// and/or modify it under the terms of the GNU Lesser General   ////
2359 
//// Public License as published by the Free Software Foundation; ////
2360 
//// either version 2.1 of the License, or (at your option) any   ////
2361 
//// later version.                                               ////
2362 
////                                                              ////
2363 
//// This source is distributed in the hope that it will be       ////
2364 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2365 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2366 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2367 
//// details.                                                     ////
2368 
////                                                              ////
2369 
//// You should have received a copy of the GNU Lesser General    ////
2370 
//// Public License along with this source; if not, download it   ////
2371 
//// from http://www.opencores.org/lgpl.shtml                     ////
2372 
////                                                              ////
2373 
//////////////////////////////////////////////////////////////////////
2374 
 
2375 
// binary counter
2376 
 
2377 40 unneback 
`define MODULE cnt_bin_ce_rew_q_zq_l1
2378 
module `BASE`MODULE (
2379 
`undef MODULE
2380 
 cke, rew, q, zq, level1, rst, clk);
2381 
 
2382 25 unneback 
   parameter length = 4;
2383 
   input cke;
2384 
   input rew;
2385 
   output [length:1] q;
2386 
   output reg zq;
2387 
   output reg level1;
2388 
   input rst;
2389 
   input clk;
2390 
 
2391 
   parameter clear_value = 0;
2392 
   parameter set_value = 1;
2393 
   parameter wrap_value = 1;
2394 
   parameter level1_value = 15;
2395 
 
2396 29 unneback 
   wire clear;
2397 30 unneback 
   assign clear = 1'b0;
2398 25 unneback 
   reg  [length:1] qi;
2399 
   wire  [length:1] q_next, q_next_fw, q_next_rew;
2400 
   assign q_next_fw  = qi + {{length-1{1'b0}},1'b1};
2401 
   assign q_next_rew = qi - {{length-1{1'b0}},1'b1};
2402 
   assign q_next = rew ? q_next_rew : q_next_fw;
2403 
 
2404 
   always @ (posedge clk or posedge rst)
2405 
     if (rst)
2406 
       qi <= {length{1'b0}};
2407 
     else
2408 
     if (cke)
2409 
       qi <= q_next;
2410 
 
2411 
   assign q = qi;
2412 
 
2413 
 
2414 
   always @ (posedge clk or posedge rst)
2415 
     if (rst)
2416 
       zq <= 1'b1;
2417 
     else
2418 
     if (cke)
2419 
       zq <= q_next == {length{1'b0}};
2420 
 
2421 
    always @ (posedge clk or posedge rst)
2422 
    if (rst)
2423 
        level1 <= 1'b0;
2424 
    else
2425 
    if (cke)
2426 29 unneback 
    if (clear)
2427 
        level1 <= 1'b0;
2428 
    else if (q_next == level1_value)
2429 25 unneback 
        level1 <= 1'b1;
2430 
    else if (qi == level1_value & rew)
2431 
        level1 <= 1'b0;
2432 
endmodule
2433 40 unneback 
`endif
2434 
`ifdef CNT_LFSR_ZQ
2435 25 unneback 
//////////////////////////////////////////////////////////////////////
2436 
////                                                              ////
2437 
////  Versatile counter                                           ////
2438 
////                                                              ////
2439 
////  Description                                                 ////
2440 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2441 
////  counter                                                     ////
2442 
////                                                              ////
2443 
////  To Do:                                                      ////
2444 
////   - add LFSR with more taps                                  ////
2445 
////                                                              ////
2446 
////  Author(s):                                                  ////
2447 
////      - Michael Unneback, unneback@opencores.org              ////
2448 
////        ORSoC AB                                              ////
2449 
////                                                              ////
2450 
//////////////////////////////////////////////////////////////////////
2451 
////                                                              ////
2452 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2453 
////                                                              ////
2454 
//// This source file may be used and distributed without         ////
2455 
//// restriction provided that this copyright statement is not    ////
2456 
//// removed from the file and that any derivative work contains  ////
2457 
//// the original copyright notice and the associated disclaimer. ////
2458 
////                                                              ////
2459 
//// This source file is free software; you can redistribute it   ////
2460 
//// and/or modify it under the terms of the GNU Lesser General   ////
2461 
//// Public License as published by the Free Software Foundation; ////
2462 
//// either version 2.1 of the License, or (at your option) any   ////
2463 
//// later version.                                               ////
2464 
////                                                              ////
2465 
//// This source is distributed in the hope that it will be       ////
2466 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2467 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2468 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2469 
//// details.                                                     ////
2470 
////                                                              ////
2471 
//// You should have received a copy of the GNU Lesser General    ////
2472 
//// Public License along with this source; if not, download it   ////
2473 
//// from http://www.opencores.org/lgpl.shtml                     ////
2474 
////                                                              ////
2475 
//////////////////////////////////////////////////////////////////////
2476 
 
2477 6 unneback 
// LFSR counter
2478 
 
2479 40 unneback 
`define MODULE cnt_lfsr_zq
2480 
module `BASE`MODULE (
2481 
`undef MODULE
2482 
 zq, rst, clk);
2483 
 
2484 6 unneback 
   parameter length = 4;
2485 
   output reg zq;
2486 
   input rst;
2487 
   input clk;
2488 
 
2489 
   parameter clear_value = 0;
2490 
   parameter set_value = 1;
2491 
   parameter wrap_value = 8;
2492 
   parameter level1_value = 15;
2493 
 
2494 
   reg  [length:1] qi;
2495 
   reg lfsr_fb;
2496 
   wire [length:1] q_next;
2497 
   reg [32:1] polynom;
2498 
   integer i;
2499 
 
2500 
   always @ (qi)
2501 
   begin
2502 
        case (length)
2503 
         2: polynom = 32'b11;                               // 0x3
2504 
         3: polynom = 32'b110;                              // 0x6
2505 
         4: polynom = 32'b1100;                             // 0xC
2506 
         5: polynom = 32'b10100;                            // 0x14
2507 
         6: polynom = 32'b110000;                           // 0x30
2508 
         7: polynom = 32'b1100000;                          // 0x60
2509 
         8: polynom = 32'b10111000;                         // 0xb8
2510 
         9: polynom = 32'b100010000;                        // 0x110
2511 
        10: polynom = 32'b1001000000;                       // 0x240
2512 
        11: polynom = 32'b10100000000;                      // 0x500
2513 
        12: polynom = 32'b100000101001;                     // 0x829
2514 
        13: polynom = 32'b1000000001100;                    // 0x100C
2515 
        14: polynom = 32'b10000000010101;                   // 0x2015
2516 
        15: polynom = 32'b110000000000000;                  // 0x6000
2517 
        16: polynom = 32'b1101000000001000;                 // 0xD008
2518 
        17: polynom = 32'b10010000000000000;                // 0x12000
2519 
        18: polynom = 32'b100000010000000000;               // 0x20400
2520 
        19: polynom = 32'b1000000000000100011;              // 0x40023
2521 37 unneback 
        20: polynom = 32'b10010000000000000000;             // 0x90000
2522 6 unneback 
        21: polynom = 32'b101000000000000000000;            // 0x140000
2523 
        22: polynom = 32'b1100000000000000000000;           // 0x300000
2524 
        23: polynom = 32'b10000100000000000000000;          // 0x420000
2525 
        24: polynom = 32'b111000010000000000000000;         // 0xE10000
2526 
        25: polynom = 32'b1001000000000000000000000;        // 0x1200000
2527 
        26: polynom = 32'b10000000000000000000100011;       // 0x2000023
2528 
        27: polynom = 32'b100000000000000000000010011;      // 0x4000013
2529 
        28: polynom = 32'b1100100000000000000000000000;     // 0xC800000
2530 
        29: polynom = 32'b10100000000000000000000000000;    // 0x14000000
2531 
        30: polynom = 32'b100000000000000000000000101001;   // 0x20000029
2532 
        31: polynom = 32'b1001000000000000000000000000000;  // 0x48000000
2533 
        32: polynom = 32'b10000000001000000000000000000011; // 0x80200003
2534 
        default: polynom = 32'b0;
2535 
        endcase
2536 
        lfsr_fb = qi[length];
2537 
        for (i=length-1; i>=1; i=i-1) begin
2538 
            if (polynom[i])
2539 
                lfsr_fb = lfsr_fb  ~^ qi[i];
2540 
        end
2541 
    end
2542 
   assign q_next = (qi == wrap_value) ? {length{1'b0}} :{qi[length-1:1],lfsr_fb};
2543 
 
2544 
   always @ (posedge clk or posedge rst)
2545 
     if (rst)
2546 
       qi <= {length{1'b0}};
2547 
     else
2548 
       qi <= q_next;
2549 
 
2550 
 
2551 
 
2552 
   always @ (posedge clk or posedge rst)
2553 
     if (rst)
2554 
       zq <= 1'b1;
2555 
     else
2556 
       zq <= q_next == {length{1'b0}};
2557 
endmodule
2558 40 unneback 
`endif
2559 75 unneback 
`ifdef CNT_LFSR_CE
2560 
//////////////////////////////////////////////////////////////////////
2561 
////                                                              ////
2562 
////  Versatile counter                                           ////
2563 
////                                                              ////
2564 
////  Description                                                 ////
2565 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2566 
////  counter                                                     ////
2567 
////                                                              ////
2568 
////  To Do:                                                      ////
2569 
////   - add LFSR with more taps                                  ////
2570 
////                                                              ////
2571 
////  Author(s):                                                  ////
2572 
////      - Michael Unneback, unneback@opencores.org              ////
2573 
////        ORSoC AB                                              ////
2574 
////                                                              ////
2575 
//////////////////////////////////////////////////////////////////////
2576 
////                                                              ////
2577 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2578 
////                                                              ////
2579 
//// This source file may be used and distributed without         ////
2580 
//// restriction provided that this copyright statement is not    ////
2581 
//// removed from the file and that any derivative work contains  ////
2582 
//// the original copyright notice and the associated disclaimer. ////
2583 
////                                                              ////
2584 
//// This source file is free software; you can redistribute it   ////
2585 
//// and/or modify it under the terms of the GNU Lesser General   ////
2586 
//// Public License as published by the Free Software Foundation; ////
2587 
//// either version 2.1 of the License, or (at your option) any   ////
2588 
//// later version.                                               ////
2589 
////                                                              ////
2590 
//// This source is distributed in the hope that it will be       ////
2591 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2592 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2593 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2594 
//// details.                                                     ////
2595 
////                                                              ////
2596 
//// You should have received a copy of the GNU Lesser General    ////
2597 
//// Public License along with this source; if not, download it   ////
2598 
//// from http://www.opencores.org/lgpl.shtml                     ////
2599 
////                                                              ////
2600 
//////////////////////////////////////////////////////////////////////
2601 
 
2602 
// LFSR counter
2603 
 
2604 
`define MODULE cnt_lfsr_ce
2605 
module `BASE`MODULE (
2606 
`undef MODULE
2607 
 cke, zq, rst, clk);
2608 
 
2609 
   parameter length = 4;
2610 
   input cke;
2611 
   output reg zq;
2612 
   input rst;
2613 
   input clk;
2614 
 
2615 
   parameter clear_value = 0;
2616 
   parameter set_value = 1;
2617 
   parameter wrap_value = 0;
2618 
   parameter level1_value = 15;
2619 
 
2620 
   reg  [length:1] qi;
2621 
   reg lfsr_fb;
2622 
   wire [length:1] q_next;
2623 
   reg [32:1] polynom;
2624 
   integer i;
2625 
 
2626 
   always @ (qi)
2627 
   begin
2628 
        case (length)
2629 
         2: polynom = 32'b11;                               // 0x3
2630 
         3: polynom = 32'b110;                              // 0x6
2631 
         4: polynom = 32'b1100;                             // 0xC
2632 
         5: polynom = 32'b10100;                            // 0x14
2633 
         6: polynom = 32'b110000;                           // 0x30
2634 
         7: polynom = 32'b1100000;                          // 0x60
2635 
         8: polynom = 32'b10111000;                         // 0xb8
2636 
         9: polynom = 32'b100010000;                        // 0x110
2637 
        10: polynom = 32'b1001000000;                       // 0x240
2638 
        11: polynom = 32'b10100000000;                      // 0x500
2639 
        12: polynom = 32'b100000101001;                     // 0x829
2640 
        13: polynom = 32'b1000000001100;                    // 0x100C
2641 
        14: polynom = 32'b10000000010101;                   // 0x2015
2642 
        15: polynom = 32'b110000000000000;                  // 0x6000
2643 
        16: polynom = 32'b1101000000001000;                 // 0xD008
2644 
        17: polynom = 32'b10010000000000000;                // 0x12000
2645 
        18: polynom = 32'b100000010000000000;               // 0x20400
2646 
        19: polynom = 32'b1000000000000100011;              // 0x40023
2647 
        20: polynom = 32'b10010000000000000000;             // 0x90000
2648 
        21: polynom = 32'b101000000000000000000;            // 0x140000
2649 
        22: polynom = 32'b1100000000000000000000;           // 0x300000
2650 
        23: polynom = 32'b10000100000000000000000;          // 0x420000
2651 
        24: polynom = 32'b111000010000000000000000;         // 0xE10000
2652 
        25: polynom = 32'b1001000000000000000000000;        // 0x1200000
2653 
        26: polynom = 32'b10000000000000000000100011;       // 0x2000023
2654 
        27: polynom = 32'b100000000000000000000010011;      // 0x4000013
2655 
        28: polynom = 32'b1100100000000000000000000000;     // 0xC800000
2656 
        29: polynom = 32'b10100000000000000000000000000;    // 0x14000000
2657 
        30: polynom = 32'b100000000000000000000000101001;   // 0x20000029
2658 
        31: polynom = 32'b1001000000000000000000000000000;  // 0x48000000
2659 
        32: polynom = 32'b10000000001000000000000000000011; // 0x80200003
2660 
        default: polynom = 32'b0;
2661 
        endcase
2662 
        lfsr_fb = qi[length];
2663 
        for (i=length-1; i>=1; i=i-1) begin
2664 
            if (polynom[i])
2665 
                lfsr_fb = lfsr_fb  ~^ qi[i];
2666 
        end
2667 
    end
2668 
   assign q_next = (qi == wrap_value) ? {length{1'b0}} :{qi[length-1:1],lfsr_fb};
2669 
 
2670 
   always @ (posedge clk or posedge rst)
2671 
     if (rst)
2672 
       qi <= {length{1'b0}};
2673 
     else
2674 
     if (cke)
2675 
       qi <= q_next;
2676 
 
2677 
 
2678 
 
2679 
   always @ (posedge clk or posedge rst)
2680 
     if (rst)
2681 
       zq <= 1'b1;
2682 
     else
2683 
     if (cke)
2684 
       zq <= q_next == {length{1'b0}};
2685 
endmodule
2686 
`endif
2687 40 unneback 
`ifdef CNT_LFSR_CE_ZQ
2688 6 unneback 
//////////////////////////////////////////////////////////////////////
2689 
////                                                              ////
2690 
////  Versatile counter                                           ////
2691 
////                                                              ////
2692 
////  Description                                                 ////
2693 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2694 
////  counter                                                     ////
2695 
////                                                              ////
2696 
////  To Do:                                                      ////
2697 
////   - add LFSR with more taps                                  ////
2698 
////                                                              ////
2699 
////  Author(s):                                                  ////
2700 
////      - Michael Unneback, unneback@opencores.org              ////
2701 
////        ORSoC AB                                              ////
2702 
////                                                              ////
2703 
//////////////////////////////////////////////////////////////////////
2704 
////                                                              ////
2705 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2706 
////                                                              ////
2707 
//// This source file may be used and distributed without         ////
2708 
//// restriction provided that this copyright statement is not    ////
2709 
//// removed from the file and that any derivative work contains  ////
2710 
//// the original copyright notice and the associated disclaimer. ////
2711 
////                                                              ////
2712 
//// This source file is free software; you can redistribute it   ////
2713 
//// and/or modify it under the terms of the GNU Lesser General   ////
2714 
//// Public License as published by the Free Software Foundation; ////
2715 
//// either version 2.1 of the License, or (at your option) any   ////
2716 
//// later version.                                               ////
2717 
////                                                              ////
2718 
//// This source is distributed in the hope that it will be       ////
2719 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2720 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2721 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2722 
//// details.                                                     ////
2723 
////                                                              ////
2724 
//// You should have received a copy of the GNU Lesser General    ////
2725 
//// Public License along with this source; if not, download it   ////
2726 
//// from http://www.opencores.org/lgpl.shtml                     ////
2727 
////                                                              ////
2728 
//////////////////////////////////////////////////////////////////////
2729 
 
2730 
// LFSR counter
2731 
 
2732 40 unneback 
`define MODULE cnt_lfsr_ce_zq
2733 
module `BASE`MODULE (
2734 
`undef MODULE
2735 
 cke, zq, rst, clk);
2736 
 
2737 6 unneback 
   parameter length = 4;
2738 
   input cke;
2739 
   output reg zq;
2740 
   input rst;
2741 
   input clk;
2742 
 
2743 
   parameter clear_value = 0;
2744 
   parameter set_value = 1;
2745 
   parameter wrap_value = 8;
2746 
   parameter level1_value = 15;
2747 
 
2748 
   reg  [length:1] qi;
2749 
   reg lfsr_fb;
2750 
   wire [length:1] q_next;
2751 
   reg [32:1] polynom;
2752 
   integer i;
2753 
 
2754 
   always @ (qi)
2755 
   begin
2756 
        case (length)
2757 
         2: polynom = 32'b11;                               // 0x3
2758 
         3: polynom = 32'b110;                              // 0x6
2759 
         4: polynom = 32'b1100;                             // 0xC
2760 
         5: polynom = 32'b10100;                            // 0x14
2761 
         6: polynom = 32'b110000;                           // 0x30
2762 
         7: polynom = 32'b1100000;                          // 0x60
2763 
         8: polynom = 32'b10111000;                         // 0xb8
2764 
         9: polynom = 32'b100010000;                        // 0x110
2765 
        10: polynom = 32'b1001000000;                       // 0x240
2766 
        11: polynom = 32'b10100000000;                      // 0x500
2767 
        12: polynom = 32'b100000101001;                     // 0x829
2768 
        13: polynom = 32'b1000000001100;                    // 0x100C
2769 
        14: polynom = 32'b10000000010101;                   // 0x2015
2770 
        15: polynom = 32'b110000000000000;                  // 0x6000
2771 
        16: polynom = 32'b1101000000001000;                 // 0xD008
2772 
        17: polynom = 32'b10010000000000000;                // 0x12000
2773 
        18: polynom = 32'b100000010000000000;               // 0x20400
2774 
        19: polynom = 32'b1000000000000100011;              // 0x40023
2775 37 unneback 
        20: polynom = 32'b10010000000000000000;             // 0x90000
2776 6 unneback 
        21: polynom = 32'b101000000000000000000;            // 0x140000
2777 
        22: polynom = 32'b1100000000000000000000;           // 0x300000
2778 
        23: polynom = 32'b10000100000000000000000;          // 0x420000
2779 
        24: polynom = 32'b111000010000000000000000;         // 0xE10000
2780 
        25: polynom = 32'b1001000000000000000000000;        // 0x1200000
2781 
        26: polynom = 32'b10000000000000000000100011;       // 0x2000023
2782 
        27: polynom = 32'b100000000000000000000010011;      // 0x4000013
2783 
        28: polynom = 32'b1100100000000000000000000000;     // 0xC800000
2784 
        29: polynom = 32'b10100000000000000000000000000;    // 0x14000000
2785 
        30: polynom = 32'b100000000000000000000000101001;   // 0x20000029
2786 
        31: polynom = 32'b1001000000000000000000000000000;  // 0x48000000
2787 
        32: polynom = 32'b10000000001000000000000000000011; // 0x80200003
2788 
        default: polynom = 32'b0;
2789 
        endcase
2790 
        lfsr_fb = qi[length];
2791 
        for (i=length-1; i>=1; i=i-1) begin
2792 
            if (polynom[i])
2793 
                lfsr_fb = lfsr_fb  ~^ qi[i];
2794 
        end
2795 
    end
2796 
   assign q_next = (qi == wrap_value) ? {length{1'b0}} :{qi[length-1:1],lfsr_fb};
2797 
 
2798 
   always @ (posedge clk or posedge rst)
2799 
     if (rst)
2800 
       qi <= {length{1'b0}};
2801 
     else
2802 
     if (cke)
2803 
       qi <= q_next;
2804 
 
2805 
 
2806 
 
2807 
   always @ (posedge clk or posedge rst)
2808 
     if (rst)
2809 
       zq <= 1'b1;
2810 
     else
2811 
     if (cke)
2812 
       zq <= q_next == {length{1'b0}};
2813 
endmodule
2814 40 unneback 
`endif
2815 
`ifdef CNT_LFSR_CE_Q
2816 6 unneback 
//////////////////////////////////////////////////////////////////////
2817 
////                                                              ////
2818 
////  Versatile counter                                           ////
2819 
////                                                              ////
2820 
////  Description                                                 ////
2821 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2822 
////  counter                                                     ////
2823 
////                                                              ////
2824 
////  To Do:                                                      ////
2825 
////   - add LFSR with more taps                                  ////
2826 
////                                                              ////
2827 
////  Author(s):                                                  ////
2828 
////      - Michael Unneback, unneback@opencores.org              ////
2829 
////        ORSoC AB                                              ////
2830 
////                                                              ////
2831 
//////////////////////////////////////////////////////////////////////
2832 
////                                                              ////
2833 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2834 
////                                                              ////
2835 
//// This source file may be used and distributed without         ////
2836 
//// restriction provided that this copyright statement is not    ////
2837 
//// removed from the file and that any derivative work contains  ////
2838 
//// the original copyright notice and the associated disclaimer. ////
2839 
////                                                              ////
2840 
//// This source file is free software; you can redistribute it   ////
2841 
//// and/or modify it under the terms of the GNU Lesser General   ////
2842 
//// Public License as published by the Free Software Foundation; ////
2843 
//// either version 2.1 of the License, or (at your option) any   ////
2844 
//// later version.                                               ////
2845 
////                                                              ////
2846 
//// This source is distributed in the hope that it will be       ////
2847 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2848 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2849 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2850 
//// details.                                                     ////
2851 
////                                                              ////
2852 
//// You should have received a copy of the GNU Lesser General    ////
2853 
//// Public License along with this source; if not, download it   ////
2854 
//// from http://www.opencores.org/lgpl.shtml                     ////
2855 
////                                                              ////
2856 
//////////////////////////////////////////////////////////////////////
2857 22 unneback 
 
2858 
// LFSR counter
2859 27 unneback 
 
2860 40 unneback 
`define MODULE cnt_lfsr_ce_q
2861 
module `BASE`MODULE (
2862 
`undef MODULE
2863 
 cke, q, rst, clk);
2864 
 
2865 27 unneback 
   parameter length = 4;
2866 
   input cke;
2867 
   output [length:1] q;
2868 
   input rst;
2869 
   input clk;
2870 
 
2871 
   parameter clear_value = 0;
2872 
   parameter set_value = 1;
2873 
   parameter wrap_value = 8;
2874 
   parameter level1_value = 15;
2875 
 
2876 
   reg  [length:1] qi;
2877 
   reg lfsr_fb;
2878 
   wire [length:1] q_next;
2879 
   reg [32:1] polynom;
2880 
   integer i;
2881 
 
2882 
   always @ (qi)
2883 
   begin
2884 
        case (length)
2885 
         2: polynom = 32'b11;                               // 0x3
2886 
         3: polynom = 32'b110;                              // 0x6
2887 
         4: polynom = 32'b1100;                             // 0xC
2888 
         5: polynom = 32'b10100;                            // 0x14
2889 
         6: polynom = 32'b110000;                           // 0x30
2890 
         7: polynom = 32'b1100000;                          // 0x60
2891 
         8: polynom = 32'b10111000;                         // 0xb8
2892 
         9: polynom = 32'b100010000;                        // 0x110
2893 
        10: polynom = 32'b1001000000;                       // 0x240
2894 
        11: polynom = 32'b10100000000;                      // 0x500
2895 
        12: polynom = 32'b100000101001;                     // 0x829
2896 
        13: polynom = 32'b1000000001100;                    // 0x100C
2897 
        14: polynom = 32'b10000000010101;                   // 0x2015
2898 
        15: polynom = 32'b110000000000000;                  // 0x6000
2899 
        16: polynom = 32'b1101000000001000;                 // 0xD008
2900 
        17: polynom = 32'b10010000000000000;                // 0x12000
2901 
        18: polynom = 32'b100000010000000000;               // 0x20400
2902 
        19: polynom = 32'b1000000000000100011;              // 0x40023
2903 37 unneback 
        20: polynom = 32'b10010000000000000000;             // 0x90000
2904 27 unneback 
        21: polynom = 32'b101000000000000000000;            // 0x140000
2905 
        22: polynom = 32'b1100000000000000000000;           // 0x300000
2906 
        23: polynom = 32'b10000100000000000000000;          // 0x420000
2907 
        24: polynom = 32'b111000010000000000000000;         // 0xE10000
2908 
        25: polynom = 32'b1001000000000000000000000;        // 0x1200000
2909 
        26: polynom = 32'b10000000000000000000100011;       // 0x2000023
2910 
        27: polynom = 32'b100000000000000000000010011;      // 0x4000013
2911 
        28: polynom = 32'b1100100000000000000000000000;     // 0xC800000
2912 
        29: polynom = 32'b10100000000000000000000000000;    // 0x14000000
2913 
        30: polynom = 32'b100000000000000000000000101001;   // 0x20000029
2914 
        31: polynom = 32'b1001000000000000000000000000000;  // 0x48000000
2915 
        32: polynom = 32'b10000000001000000000000000000011; // 0x80200003
2916 
        default: polynom = 32'b0;
2917 
        endcase
2918 
        lfsr_fb = qi[length];
2919 
        for (i=length-1; i>=1; i=i-1) begin
2920 
            if (polynom[i])
2921 
                lfsr_fb = lfsr_fb  ~^ qi[i];
2922 
        end
2923 
    end
2924 
   assign q_next = (qi == wrap_value) ? {length{1'b0}} :{qi[length-1:1],lfsr_fb};
2925 
 
2926 
   always @ (posedge clk or posedge rst)
2927 
     if (rst)
2928 
       qi <= {length{1'b0}};
2929 
     else
2930 
     if (cke)
2931 
       qi <= q_next;
2932 
 
2933 
   assign q = qi;
2934 
 
2935 
endmodule
2936 40 unneback 
`endif
2937 
`ifdef CNT_LFSR_CE_CLEAR_Q
2938 27 unneback 
//////////////////////////////////////////////////////////////////////
2939 
////                                                              ////
2940 
////  Versatile counter                                           ////
2941 
////                                                              ////
2942 
////  Description                                                 ////
2943 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
2944 
////  counter                                                     ////
2945 
////                                                              ////
2946 
////  To Do:                                                      ////
2947 
////   - add LFSR with more taps                                  ////
2948 
////                                                              ////
2949 
////  Author(s):                                                  ////
2950 
////      - Michael Unneback, unneback@opencores.org              ////
2951 
////        ORSoC AB                                              ////
2952 
////                                                              ////
2953 
//////////////////////////////////////////////////////////////////////
2954 
////                                                              ////
2955 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
2956 
////                                                              ////
2957 
//// This source file may be used and distributed without         ////
2958 
//// restriction provided that this copyright statement is not    ////
2959 
//// removed from the file and that any derivative work contains  ////
2960 
//// the original copyright notice and the associated disclaimer. ////
2961 
////                                                              ////
2962 
//// This source file is free software; you can redistribute it   ////
2963 
//// and/or modify it under the terms of the GNU Lesser General   ////
2964 
//// Public License as published by the Free Software Foundation; ////
2965 
//// either version 2.1 of the License, or (at your option) any   ////
2966 
//// later version.                                               ////
2967 
////                                                              ////
2968 
//// This source is distributed in the hope that it will be       ////
2969 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
2970 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
2971 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
2972 
//// details.                                                     ////
2973 
////                                                              ////
2974 
//// You should have received a copy of the GNU Lesser General    ////
2975 
//// Public License along with this source; if not, download it   ////
2976 
//// from http://www.opencores.org/lgpl.shtml                     ////
2977 
////                                                              ////
2978 
//////////////////////////////////////////////////////////////////////
2979 
 
2980 
// LFSR counter
2981 
 
2982 40 unneback 
`define MODULE cnt_lfsr_ce_clear_q
2983 
module `BASE`MODULE (
2984 
`undef MODULE
2985 
 clear, cke, q, rst, clk);
2986 
 
2987 27 unneback 
   parameter length = 4;
2988 
   input clear;
2989 
   input cke;
2990 
   output [length:1] q;
2991 
   input rst;
2992 
   input clk;
2993 
 
2994 
   parameter clear_value = 0;
2995 
   parameter set_value = 1;
2996 
   parameter wrap_value = 8;
2997 
   parameter level1_value = 15;
2998 
 
2999 
   reg  [length:1] qi;
3000 
   reg lfsr_fb;
3001 
   wire [length:1] q_next;
3002 
   reg [32:1] polynom;
3003 
   integer i;
3004 
 
3005 
   always @ (qi)
3006 
   begin
3007 
        case (length)
3008 
         2: polynom = 32'b11;                               // 0x3
3009 
         3: polynom = 32'b110;                              // 0x6
3010 
         4: polynom = 32'b1100;                             // 0xC
3011 
         5: polynom = 32'b10100;                            // 0x14
3012 
         6: polynom = 32'b110000;                           // 0x30
3013 
         7: polynom = 32'b1100000;                          // 0x60
3014 
         8: polynom = 32'b10111000;                         // 0xb8
3015 
         9: polynom = 32'b100010000;                        // 0x110
3016 
        10: polynom = 32'b1001000000;                       // 0x240
3017 
        11: polynom = 32'b10100000000;                      // 0x500
3018 
        12: polynom = 32'b100000101001;                     // 0x829
3019 
        13: polynom = 32'b1000000001100;                    // 0x100C
3020 
        14: polynom = 32'b10000000010101;                   // 0x2015
3021 
        15: polynom = 32'b110000000000000;                  // 0x6000
3022 
        16: polynom = 32'b1101000000001000;                 // 0xD008
3023 
        17: polynom = 32'b10010000000000000;                // 0x12000
3024 
        18: polynom = 32'b100000010000000000;               // 0x20400
3025 
        19: polynom = 32'b1000000000000100011;              // 0x40023
3026 37 unneback 
        20: polynom = 32'b10010000000000000000;             // 0x90000
3027 27 unneback 
        21: polynom = 32'b101000000000000000000;            // 0x140000
3028 
        22: polynom = 32'b1100000000000000000000;           // 0x300000
3029 
        23: polynom = 32'b10000100000000000000000;          // 0x420000
3030 
        24: polynom = 32'b111000010000000000000000;         // 0xE10000
3031 
        25: polynom = 32'b1001000000000000000000000;        // 0x1200000
3032 
        26: polynom = 32'b10000000000000000000100011;       // 0x2000023
3033 
        27: polynom = 32'b100000000000000000000010011;      // 0x4000013
3034 
        28: polynom = 32'b1100100000000000000000000000;     // 0xC800000
3035 
        29: polynom = 32'b10100000000000000000000000000;    // 0x14000000
3036 
        30: polynom = 32'b100000000000000000000000101001;   // 0x20000029
3037 
        31: polynom = 32'b1001000000000000000000000000000;  // 0x48000000
3038 
        32: polynom = 32'b10000000001000000000000000000011; // 0x80200003
3039 
        default: polynom = 32'b0;
3040 
        endcase
3041 
        lfsr_fb = qi[length];
3042 
        for (i=length-1; i>=1; i=i-1) begin
3043 
            if (polynom[i])
3044 
                lfsr_fb = lfsr_fb  ~^ qi[i];
3045 
        end
3046 
    end
3047 
   assign q_next =  clear ? {length{1'b0}} :(qi == wrap_value) ? {length{1'b0}} :{qi[length-1:1],lfsr_fb};
3048 
 
3049 
   always @ (posedge clk or posedge rst)
3050 
     if (rst)
3051 
       qi <= {length{1'b0}};
3052 
     else
3053 
     if (cke)
3054 
       qi <= q_next;
3055 
 
3056 
   assign q = qi;
3057 
 
3058 
endmodule
3059 40 unneback 
`endif
3060 
`ifdef CNT_LFSR_CE_Q_ZQ
3061 27 unneback 
//////////////////////////////////////////////////////////////////////
3062 
////                                                              ////
3063 
////  Versatile counter                                           ////
3064 
////                                                              ////
3065 
////  Description                                                 ////
3066 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
3067 
////  counter                                                     ////
3068 
////                                                              ////
3069 
////  To Do:                                                      ////
3070 
////   - add LFSR with more taps                                  ////
3071 
////                                                              ////
3072 
////  Author(s):                                                  ////
3073 
////      - Michael Unneback, unneback@opencores.org              ////
3074 
////        ORSoC AB                                              ////
3075 
////                                                              ////
3076 
//////////////////////////////////////////////////////////////////////
3077 
////                                                              ////
3078 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
3079 
////                                                              ////
3080 
//// This source file may be used and distributed without         ////
3081 
//// restriction provided that this copyright statement is not    ////
3082 
//// removed from the file and that any derivative work contains  ////
3083 
//// the original copyright notice and the associated disclaimer. ////
3084 
////                                                              ////
3085 
//// This source file is free software; you can redistribute it   ////
3086 
//// and/or modify it under the terms of the GNU Lesser General   ////
3087 
//// Public License as published by the Free Software Foundation; ////
3088 
//// either version 2.1 of the License, or (at your option) any   ////
3089 
//// later version.                                               ////
3090 
////                                                              ////
3091 
//// This source is distributed in the hope that it will be       ////
3092 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
3093 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
3094 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
3095 
//// details.                                                     ////
3096 
////                                                              ////
3097 
//// You should have received a copy of the GNU Lesser General    ////
3098 
//// Public License along with this source; if not, download it   ////
3099 
//// from http://www.opencores.org/lgpl.shtml                     ////
3100 
////                                                              ////
3101 
//////////////////////////////////////////////////////////////////////
3102 
 
3103 
// LFSR counter
3104 22 unneback 
 
3105 40 unneback 
`define MODULE cnt_lfsr_ce_q_zq
3106 
module `BASE`MODULE (
3107 
`undef MODULE
3108 
 cke, q, zq, rst, clk);
3109 
 
3110 22 unneback 
   parameter length = 4;
3111 
   input cke;
3112 
   output [length:1] q;
3113 
   output reg zq;
3114 
   input rst;
3115 
   input clk;
3116 
 
3117 
   parameter clear_value = 0;
3118 
   parameter set_value = 1;
3119 
   parameter wrap_value = 8;
3120 
   parameter level1_value = 15;
3121 
 
3122 
   reg  [length:1] qi;
3123 
   reg lfsr_fb;
3124 
   wire [length:1] q_next;
3125 
   reg [32:1] polynom;
3126 
   integer i;
3127 
 
3128 
   always @ (qi)
3129 
   begin
3130 
        case (length)
3131 
         2: polynom = 32'b11;                               // 0x3
3132 
         3: polynom = 32'b110;                              // 0x6
3133 
         4: polynom = 32'b1100;                             // 0xC
3134 
         5: polynom = 32'b10100;                            // 0x14
3135 
         6: polynom = 32'b110000;                           // 0x30
3136 
         7: polynom = 32'b1100000;                          // 0x60
3137 
         8: polynom = 32'b10111000;                         // 0xb8
3138 
         9: polynom = 32'b100010000;                        // 0x110
3139 
        10: polynom = 32'b1001000000;                       // 0x240
3140 
        11: polynom = 32'b10100000000;                      // 0x500
3141 
        12: polynom = 32'b100000101001;                     // 0x829
3142 
        13: polynom = 32'b1000000001100;                    // 0x100C
3143 
        14: polynom = 32'b10000000010101;                   // 0x2015
3144 
        15: polynom = 32'b110000000000000;                  // 0x6000
3145 
        16: polynom = 32'b1101000000001000;                 // 0xD008
3146 
        17: polynom = 32'b10010000000000000;                // 0x12000
3147 
        18: polynom = 32'b100000010000000000;               // 0x20400
3148 
        19: polynom = 32'b1000000000000100011;              // 0x40023
3149 37 unneback 
        20: polynom = 32'b10010000000000000000;             // 0x90000
3150 22 unneback 
        21: polynom = 32'b101000000000000000000;            // 0x140000
3151 
        22: polynom = 32'b1100000000000000000000;           // 0x300000
3152 
        23: polynom = 32'b10000100000000000000000;          // 0x420000
3153 
        24: polynom = 32'b111000010000000000000000;         // 0xE10000
3154 
        25: polynom = 32'b1001000000000000000000000;        // 0x1200000
3155 
        26: polynom = 32'b10000000000000000000100011;       // 0x2000023
3156 
        27: polynom = 32'b100000000000000000000010011;      // 0x4000013
3157 
        28: polynom = 32'b1100100000000000000000000000;     // 0xC800000
3158 
        29: polynom = 32'b10100000000000000000000000000;    // 0x14000000
3159 
        30: polynom = 32'b100000000000000000000000101001;   // 0x20000029
3160 
        31: polynom = 32'b1001000000000000000000000000000;  // 0x48000000
3161 
        32: polynom = 32'b10000000001000000000000000000011; // 0x80200003
3162 
        default: polynom = 32'b0;
3163 
        endcase
3164 
        lfsr_fb = qi[length];
3165 
        for (i=length-1; i>=1; i=i-1) begin
3166 
            if (polynom[i])
3167 
                lfsr_fb = lfsr_fb  ~^ qi[i];
3168 
        end
3169 
    end
3170 
   assign q_next = (qi == wrap_value) ? {length{1'b0}} :{qi[length-1:1],lfsr_fb};
3171 
 
3172 
   always @ (posedge clk or posedge rst)
3173 
     if (rst)
3174 
       qi <= {length{1'b0}};
3175 
     else
3176 
     if (cke)
3177 
       qi <= q_next;
3178 
 
3179 
   assign q = qi;
3180 
 
3181 
 
3182 
   always @ (posedge clk or posedge rst)
3183 
     if (rst)
3184 
       zq <= 1'b1;
3185 
     else
3186 
     if (cke)
3187 
       zq <= q_next == {length{1'b0}};
3188 
endmodule
3189 40 unneback 
`endif
3190 
`ifdef CNT_LFSR_CE_REW_L1
3191 22 unneback 
//////////////////////////////////////////////////////////////////////
3192 
////                                                              ////
3193 
////  Versatile counter                                           ////
3194 
////                                                              ////
3195 
////  Description                                                 ////
3196 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
3197 
////  counter                                                     ////
3198 
////                                                              ////
3199 
////  To Do:                                                      ////
3200 
////   - add LFSR with more taps                                  ////
3201 
////                                                              ////
3202 
////  Author(s):                                                  ////
3203 
////      - Michael Unneback, unneback@opencores.org              ////
3204 
////        ORSoC AB                                              ////
3205 
////                                                              ////
3206 
//////////////////////////////////////////////////////////////////////
3207 
////                                                              ////
3208 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
3209 
////                                                              ////
3210 
//// This source file may be used and distributed without         ////
3211 
//// restriction provided that this copyright statement is not    ////
3212 
//// removed from the file and that any derivative work contains  ////
3213 
//// the original copyright notice and the associated disclaimer. ////
3214 
////                                                              ////
3215 
//// This source file is free software; you can redistribute it   ////
3216 
//// and/or modify it under the terms of the GNU Lesser General   ////
3217 
//// Public License as published by the Free Software Foundation; ////
3218 
//// either version 2.1 of the License, or (at your option) any   ////
3219 
//// later version.                                               ////
3220 
////                                                              ////
3221 
//// This source is distributed in the hope that it will be       ////
3222 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
3223 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
3224 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
3225 
//// details.                                                     ////
3226 
////                                                              ////
3227 
//// You should have received a copy of the GNU Lesser General    ////
3228 
//// Public License along with this source; if not, download it   ////
3229 
//// from http://www.opencores.org/lgpl.shtml                     ////
3230 
////                                                              ////
3231 
//////////////////////////////////////////////////////////////////////
3232 6 unneback 
 
3233 
// LFSR counter
3234 
 
3235 40 unneback 
`define MODULE cnt_lfsr_ce_rew_l1
3236 
module `BASE`MODULE (
3237 
`undef MODULE
3238 
 cke, rew, level1, rst, clk);
3239 
 
3240 6 unneback 
   parameter length = 4;
3241 
   input cke;
3242 
   input rew;
3243 
   output reg level1;
3244 
   input rst;
3245 
   input clk;
3246 
 
3247 
   parameter clear_value = 0;
3248 
   parameter set_value = 1;
3249 
   parameter wrap_value = 8;
3250 
   parameter level1_value = 15;
3251 
 
3252 29 unneback 
   wire clear;
3253 30 unneback 
   assign clear = 1'b0;
3254 6 unneback 
   reg  [length:1] qi;
3255 
   reg lfsr_fb, lfsr_fb_rew;
3256 
   wire  [length:1] q_next, q_next_fw, q_next_rew;
3257 
   reg [32:1] polynom_rew;
3258 
   integer j;
3259 
   reg [32:1] polynom;
3260 
   integer i;
3261 
 
3262 
   always @ (qi)
3263 
   begin
3264 
        case (length)
3265 
         2: polynom = 32'b11;                               // 0x3
3266 
         3: polynom = 32'b110;                              // 0x6
3267 
         4: polynom = 32'b1100;                             // 0xC
3268 
         5: polynom = 32'b10100;                            // 0x14
3269 
         6: polynom = 32'b110000;                           // 0x30
3270 
         7: polynom = 32'b1100000;                          // 0x60
3271 
         8: polynom = 32'b10111000;                         // 0xb8
3272 
         9: polynom = 32'b100010000;                        // 0x110
3273 
        10: polynom = 32'b1001000000;                       // 0x240
3274 
        11: polynom = 32'b10100000000;                      // 0x500
3275 
        12: polynom = 32'b100000101001;                     // 0x829
3276 
        13: polynom = 32'b1000000001100;                    // 0x100C
3277 
        14: polynom = 32'b10000000010101;                   // 0x2015
3278 
        15: polynom = 32'b110000000000000;                  // 0x6000
3279 
        16: polynom = 32'b1101000000001000;                 // 0xD008
3280 
        17: polynom = 32'b10010000000000000;                // 0x12000
3281 
        18: polynom = 32'b100000010000000000;               // 0x20400
3282 
        19: polynom = 32'b1000000000000100011;              // 0x40023
3283 37 unneback 
        20: polynom = 32'b10010000000000000000;             // 0x90000
3284 6 unneback 
        21: polynom = 32'b101000000000000000000;            // 0x140000
3285 
        22: polynom = 32'b1100000000000000000000;           // 0x300000
3286 
        23: polynom = 32'b10000100000000000000000;          // 0x420000
3287 
        24: polynom = 32'b111000010000000000000000;         // 0xE10000
3288 
        25: polynom = 32'b1001000000000000000000000;        // 0x1200000
3289 
        26: polynom = 32'b10000000000000000000100011;       // 0x2000023
3290 
        27: polynom = 32'b100000000000000000000010011;      // 0x4000013
3291 
        28: polynom = 32'b1100100000000000000000000000;     // 0xC800000
3292 
        29: polynom = 32'b10100000000000000000000000000;    // 0x14000000
3293 
        30: polynom = 32'b100000000000000000000000101001;   // 0x20000029
3294 
        31: polynom = 32'b1001000000000000000000000000000;  // 0x48000000
3295 
        32: polynom = 32'b10000000001000000000000000000011; // 0x80200003
3296 
        default: polynom = 32'b0;
3297 
        endcase
3298 
        lfsr_fb = qi[length];
3299 
        for (i=length-1; i>=1; i=i-1) begin
3300 
            if (polynom[i])
3301 
                lfsr_fb = lfsr_fb  ~^ qi[i];
3302 
        end
3303 
    end
3304 
   assign q_next_fw  = (qi == wrap_value) ? {length{1'b0}} :{qi[length-1:1],lfsr_fb};
3305 
   always @ (qi)
3306 
   begin
3307 
        case (length)
3308 
         2: polynom_rew = 32'b11;
3309 
         3: polynom_rew = 32'b110;
3310 
         4: polynom_rew = 32'b1100;
3311 
         5: polynom_rew = 32'b10100;
3312 
         6: polynom_rew = 32'b110000;
3313 
         7: polynom_rew = 32'b1100000;
3314 
         8: polynom_rew = 32'b10111000;
3315 
         9: polynom_rew = 32'b100010000;
3316 
        10: polynom_rew = 32'b1001000000;
3317 
        11: polynom_rew = 32'b10100000000;
3318 
        12: polynom_rew = 32'b100000101001;
3319 
        13: polynom_rew = 32'b1000000001100;
3320 
        14: polynom_rew = 32'b10000000010101;
3321 
        15: polynom_rew = 32'b110000000000000;
3322 
        16: polynom_rew = 32'b1101000000001000;
3323 
        17: polynom_rew = 32'b10010000000000000;
3324 
        18: polynom_rew = 32'b100000010000000000;
3325 
        19: polynom_rew = 32'b1000000000000100011;
3326 
        20: polynom_rew = 32'b10000010000000000000;
3327 
        21: polynom_rew = 32'b101000000000000000000;
3328 
        22: polynom_rew = 32'b1100000000000000000000;
3329 
        23: polynom_rew = 32'b10000100000000000000000;
3330 
        24: polynom_rew = 32'b111000010000000000000000;
3331 
        25: polynom_rew = 32'b1001000000000000000000000;
3332 
        26: polynom_rew = 32'b10000000000000000000100011;
3333 
        27: polynom_rew = 32'b100000000000000000000010011;
3334 
        28: polynom_rew = 32'b1100100000000000000000000000;
3335 
        29: polynom_rew = 32'b10100000000000000000000000000;
3336 
        30: polynom_rew = 32'b100000000000000000000000101001;
3337 
        31: polynom_rew = 32'b1001000000000000000000000000000;
3338 
        32: polynom_rew = 32'b10000000001000000000000000000011;
3339 
        default: polynom_rew = 32'b0;
3340 
        endcase
3341 
        // rotate left
3342 
        polynom_rew[length:1] = { polynom_rew[length-2:1],polynom_rew[length] };
3343 
        lfsr_fb_rew = qi[length];
3344 
        for (i=length-1; i>=1; i=i-1) begin
3345 
            if (polynom_rew[i])
3346 
                lfsr_fb_rew = lfsr_fb_rew  ~^ qi[i];
3347 
        end
3348 
    end
3349 
   assign q_next_rew = (qi == wrap_value) ? {length{1'b0}} :{lfsr_fb_rew,qi[length:2]};
3350 
   assign q_next = rew ? q_next_rew : q_next_fw;
3351 
 
3352 
   always @ (posedge clk or posedge rst)
3353 
     if (rst)
3354 
       qi <= {length{1'b0}};
3355 
     else
3356 
     if (cke)
3357 
       qi <= q_next;
3358 
 
3359 
 
3360 
 
3361 
    always @ (posedge clk or posedge rst)
3362 
    if (rst)
3363 
        level1 <= 1'b0;
3364 
    else
3365 
    if (cke)
3366 29 unneback 
    if (clear)
3367 
        level1 <= 1'b0;
3368 
    else if (q_next == level1_value)
3369 6 unneback 
        level1 <= 1'b1;
3370 
    else if (qi == level1_value & rew)
3371 
        level1 <= 1'b0;
3372 
endmodule
3373 40 unneback 
`endif
3374 
`ifdef CNT_GRAY
3375 6 unneback 
//////////////////////////////////////////////////////////////////////
3376 
////                                                              ////
3377 
////  Versatile counter                                           ////
3378 
////                                                              ////
3379 
////  Description                                                 ////
3380 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
3381 
////  counter                                                     ////
3382 
////                                                              ////
3383 
////  To Do:                                                      ////
3384 
////   - add LFSR with more taps                                  ////
3385 
////                                                              ////
3386 
////  Author(s):                                                  ////
3387 
////      - Michael Unneback, unneback@opencores.org              ////
3388 
////        ORSoC AB                                              ////
3389 
////                                                              ////
3390 
//////////////////////////////////////////////////////////////////////
3391 
////                                                              ////
3392 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
3393 
////                                                              ////
3394 
//// This source file may be used and distributed without         ////
3395 
//// restriction provided that this copyright statement is not    ////
3396 
//// removed from the file and that any derivative work contains  ////
3397 
//// the original copyright notice and the associated disclaimer. ////
3398 
////                                                              ////
3399 
//// This source file is free software; you can redistribute it   ////
3400 
//// and/or modify it under the terms of the GNU Lesser General   ////
3401 
//// Public License as published by the Free Software Foundation; ////
3402 
//// either version 2.1 of the License, or (at your option) any   ////
3403 
//// later version.                                               ////
3404 
////                                                              ////
3405 
//// This source is distributed in the hope that it will be       ////
3406 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
3407 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
3408 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
3409 
//// details.                                                     ////
3410 
////                                                              ////
3411 
//// You should have received a copy of the GNU Lesser General    ////
3412 
//// Public License along with this source; if not, download it   ////
3413 
//// from http://www.opencores.org/lgpl.shtml                     ////
3414 
////                                                              ////
3415 
//////////////////////////////////////////////////////////////////////
3416 
 
3417 
// GRAY counter
3418 
 
3419 40 unneback 
`define MODULE cnt_gray
3420 
module `BASE`MODULE (
3421 
`undef MODULE
3422 
 q, rst, clk);
3423 
 
3424 6 unneback 
   parameter length = 4;
3425 
   output reg [length:1] q;
3426 
   input rst;
3427 
   input clk;
3428 
 
3429 
   parameter clear_value = 0;
3430 
   parameter set_value = 1;
3431 
   parameter wrap_value = 8;
3432 
   parameter level1_value = 15;
3433 
 
3434 
   reg  [length:1] qi;
3435 
   wire [length:1] q_next;
3436 
   assign q_next = qi + {{length-1{1'b0}},1'b1};
3437 
 
3438 
   always @ (posedge clk or posedge rst)
3439 
     if (rst)
3440 
       qi <= {length{1'b0}};
3441 
     else
3442 
       qi <= q_next;
3443 
 
3444 
   always @ (posedge clk or posedge rst)
3445 
     if (rst)
3446 
       q <= {length{1'b0}};
3447 
     else
3448 
         q <= (q_next>>1) ^ q_next;
3449 
 
3450 
endmodule
3451 40 unneback 
`endif
3452 
`ifdef CNT_GRAY_CE
3453 6 unneback 
//////////////////////////////////////////////////////////////////////
3454 
////                                                              ////
3455 
////  Versatile counter                                           ////
3456 
////                                                              ////
3457 
////  Description                                                 ////
3458 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
3459 
////  counter                                                     ////
3460 
////                                                              ////
3461 
////  To Do:                                                      ////
3462 
////   - add LFSR with more taps                                  ////
3463 
////                                                              ////
3464 
////  Author(s):                                                  ////
3465 
////      - Michael Unneback, unneback@opencores.org              ////
3466 
////        ORSoC AB                                              ////
3467 
////                                                              ////
3468 
//////////////////////////////////////////////////////////////////////
3469 
////                                                              ////
3470 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
3471 
////                                                              ////
3472 
//// This source file may be used and distributed without         ////
3473 
//// restriction provided that this copyright statement is not    ////
3474 
//// removed from the file and that any derivative work contains  ////
3475 
//// the original copyright notice and the associated disclaimer. ////
3476 
////                                                              ////
3477 
//// This source file is free software; you can redistribute it   ////
3478 
//// and/or modify it under the terms of the GNU Lesser General   ////
3479 
//// Public License as published by the Free Software Foundation; ////
3480 
//// either version 2.1 of the License, or (at your option) any   ////
3481 
//// later version.                                               ////
3482 
////                                                              ////
3483 
//// This source is distributed in the hope that it will be       ////
3484 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
3485 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
3486 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
3487 
//// details.                                                     ////
3488 
////                                                              ////
3489 
//// You should have received a copy of the GNU Lesser General    ////
3490 
//// Public License along with this source; if not, download it   ////
3491 
//// from http://www.opencores.org/lgpl.shtml                     ////
3492 
////                                                              ////
3493 
//////////////////////////////////////////////////////////////////////
3494 
 
3495 
// GRAY counter
3496 
 
3497 40 unneback 
`define MODULE cnt_gray_ce
3498 
module `BASE`MODULE (
3499 
`undef MODULE
3500 
 cke, q, rst, clk);
3501 
 
3502 6 unneback 
   parameter length = 4;
3503 
   input cke;
3504 
   output reg [length:1] q;
3505 
   input rst;
3506 
   input clk;
3507 
 
3508 
   parameter clear_value = 0;
3509 
   parameter set_value = 1;
3510 
   parameter wrap_value = 8;
3511 
   parameter level1_value = 15;
3512 
 
3513 
   reg  [length:1] qi;
3514 
   wire [length:1] q_next;
3515 
   assign q_next = qi + {{length-1{1'b0}},1'b1};
3516 
 
3517 
   always @ (posedge clk or posedge rst)
3518 
     if (rst)
3519 
       qi <= {length{1'b0}};
3520 
     else
3521 
     if (cke)
3522 
       qi <= q_next;
3523 
 
3524 
   always @ (posedge clk or posedge rst)
3525 
     if (rst)
3526 
       q <= {length{1'b0}};
3527 
     else
3528 
       if (cke)
3529 
         q <= (q_next>>1) ^ q_next;
3530 
 
3531 
endmodule
3532 40 unneback 
`endif
3533 
`ifdef CNT_GRAY_CE_BIN
3534 6 unneback 
//////////////////////////////////////////////////////////////////////
3535 
////                                                              ////
3536 
////  Versatile counter                                           ////
3537 
////                                                              ////
3538 
////  Description                                                 ////
3539 
////  Versatile counter, a reconfigurable binary, gray or LFSR    ////
3540 
////  counter                                                     ////
3541 
////                                                              ////
3542 
////  To Do:                                                      ////
3543 
////   - add LFSR with more taps                                  ////
3544 
////                                                              ////
3545 
////  Author(s):                                                  ////
3546 
////      - Michael Unneback, unneback@opencores.org              ////
3547 
////        ORSoC AB                                              ////
3548 
////                                                              ////
3549 
//////////////////////////////////////////////////////////////////////
3550 
////                                                              ////
3551 
//// Copyright (C) 2009 Authors and OPENCORES.ORG                 ////
3552 
////                                                              ////
3553 
//// This source file may be used and distributed without         ////
3554 
//// restriction provided that this copyright statement is not    ////
3555 
//// removed from the file and that any derivative work contains  ////
3556 
//// the original copyright notice and the associated disclaimer. ////
3557 
////                                                              ////
3558 
//// This source file is free software; you can redistribute it   ////
3559 
//// and/or modify it under the terms of the GNU Lesser General   ////
3560 
//// Public License as published by the Free Software Foundation; ////
3561 
//// either version 2.1 of the License, or (at your option) any   ////
3562 
//// later version.                                               ////
3563 
////                                                              ////
3564 
//// This source is distributed in the hope that it will be       ////
3565 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
3566 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
3567 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
3568 
//// details.                                                     ////
3569 
////                                                              ////
3570 
//// You should have received a copy of the GNU Lesser General    ////
3571 
//// Public License along with this source; if not, download it   ////
3572 
//// from http://www.opencores.org/lgpl.shtml                     ////
3573 
////                                                              ////
3574 
//////////////////////////////////////////////////////////////////////
3575 
 
3576 
// GRAY counter
3577 
 
3578 40 unneback 
`define MODULE cnt_gray_ce_bin
3579 
module `BASE`MODULE (
3580 
`undef MODULE
3581 
 cke, q, q_bin, rst, clk);
3582 
 
3583 6 unneback 
   parameter length = 4;
3584 
   input cke;
3585 
   output reg [length:1] q;
3586 
   output [length:1] q_bin;
3587 
   input rst;
3588 
   input clk;
3589 
 
3590 
   parameter clear_value = 0;
3591 
   parameter set_value = 1;
3592 
   parameter wrap_value = 8;
3593 
   parameter level1_value = 15;
3594 
 
3595 
   reg  [length:1] qi;
3596 
   wire [length:1] q_next;
3597 
   assign q_next = qi + {{length-1{1'b0}},1'b1};
3598 
 
3599 
   always @ (posedge clk or posedge rst)
3600 
     if (rst)
3601 
       qi <= {length{1'b0}};
3602 
     else
3603 
     if (cke)
3604 
       qi <= q_next;
3605 
 
3606 
   always @ (posedge clk or posedge rst)
3607 
     if (rst)
3608 
       q <= {length{1'b0}};
3609 
     else
3610 
       if (cke)
3611 
         q <= (q_next>>1) ^ q_next;
3612 
 
3613 
   assign q_bin = qi;
3614 
 
3615 
endmodule
3616 40 unneback 
`endif
3617 6 unneback 
//////////////////////////////////////////////////////////////////////
3618 
////                                                              ////
3619 
////  Versatile library, counters                                 ////
3620 
////                                                              ////
3621 
////  Description                                                 ////
3622 
////  counters                                                    ////
3623 
////                                                              ////
3624 
////                                                              ////
3625 
////  To Do:                                                      ////
3626 
////   - add more counters                                        ////
3627 
////                                                              ////
3628 
////  Author(s):                                                  ////
3629 
////      - Michael Unneback, unneback@opencores.org              ////
3630 
////        ORSoC AB                                              ////
3631 
////                                                              ////
3632 
//////////////////////////////////////////////////////////////////////
3633 
////                                                              ////
3634 
//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////
3635 
////                                                              ////
3636 
//// This source file may be used and distributed without         ////
3637 
//// restriction provided that this copyright statement is not    ////
3638 
//// removed from the file and that any derivative work contains  ////
3639 
//// the original copyright notice and the associated disclaimer. ////
3640 
////                                                              ////
3641 
//// This source file is free software; you can redistribute it   ////
3642 
//// and/or modify it under the terms of the GNU Lesser General   ////
3643 
//// Public License as published by the Free Software Foundation; ////
3644 
//// either version 2.1 of the License, or (at your option) any   ////
3645 
//// later version.                                               ////
3646 
////                                                              ////
3647 
//// This source is distributed in the hope that it will be       ////
3648 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
3649 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
3650 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
3651 
//// details.                                                     ////
3652 
////                                                              ////
3653 
//// You should have received a copy of the GNU Lesser General    ////
3654 
//// Public License along with this source; if not, download it   ////
3655 
//// from http://www.opencores.org/lgpl.shtml                     ////
3656 
////                                                              ////
3657 
//////////////////////////////////////////////////////////////////////
3658 
 
3659 40 unneback 
`ifdef CNT_SHREG_WRAP
3660 
`define MODULE cnt_shreg_wrap
3661 
module `BASE`MODULE ( q, rst, clk);
3662 
`undef MODULE
3663 6 unneback 
 
3664 
   parameter length = 4;
3665 
   output reg [0:length-1] q;
3666 
   input rst;
3667 
   input clk;
3668 
 
3669 
    always @ (posedge clk or posedge rst)
3670 
    if (rst)
3671 
        q <= {1'b1,{length-1{1'b0}}};
3672 
    else
3673 
        q <= {q[length-1],q[0:length-2]};
3674 
 
3675 
endmodule
3676 40 unneback 
`endif
3677 6 unneback 
 
3678 40 unneback 
`ifdef CNT_SHREG_CE_WRAP
3679 
`define MODULE cnt_shreg_ce_wrap
3680 
module `BASE`MODULE ( cke, q, rst, clk);
3681 
`undef MODULE
3682 6 unneback 
 
3683 
   parameter length = 4;
3684 
   input cke;
3685 
   output reg [0:length-1] q;
3686 
   input rst;
3687 
   input clk;
3688 
 
3689 
    always @ (posedge clk or posedge rst)
3690 
    if (rst)
3691 
        q <= {1'b1,{length-1{1'b0}}};
3692 
    else
3693 
        if (cke)
3694 
            q <= {q[length-1],q[0:length-2]};
3695 
 
3696 
endmodule
3697 40 unneback 
`endif
3698 6 unneback 
 
3699 40 unneback 
`ifdef CNT_SHREG_CE_CLEAR
3700 
`define MODULE cnt_shreg_ce_clear
3701 
module `BASE`MODULE ( cke, clear, q, rst, clk);
3702 
`undef MODULE
3703 6 unneback 
 
3704 
   parameter length = 4;
3705 
   input cke, clear;
3706 
   output reg [0:length-1] q;
3707 
   input rst;
3708 
   input clk;
3709 
 
3710 
    always @ (posedge clk or posedge rst)
3711 
    if (rst)
3712 
        q <= {1'b1,{length-1{1'b0}}};
3713 
    else
3714 
        if (cke)
3715 
            if (clear)
3716 
                q <= {1'b1,{length-1{1'b0}}};
3717 
            else
3718 
                q <= q >> 1;
3719 
 
3720 
endmodule
3721 40 unneback 
`endif
3722 6 unneback 
 
3723 40 unneback 
`ifdef CNT_SHREG_CE_CLEAR_WRAP
3724 
`define MODULE cnt_shreg_ce_clear_wrap
3725 
module `BASE`MODULE ( cke, clear, q, rst, clk);
3726 
`undef MODULE
3727 6 unneback 
 
3728 
   parameter length = 4;
3729 
   input cke, clear;
3730 
   output reg [0:length-1] q;
3731 
   input rst;
3732 
   input clk;
3733 
 
3734 
    always @ (posedge clk or posedge rst)
3735 
    if (rst)
3736 
        q <= {1'b1,{length-1{1'b0}}};
3737 
    else
3738 
        if (cke)
3739 
            if (clear)
3740 
                q <= {1'b1,{length-1{1'b0}}};
3741 
            else
3742 
            q <= {q[length-1],q[0:length-2]};
3743 
 
3744 
endmodule
3745 40 unneback 
`endif
3746 6 unneback 
//////////////////////////////////////////////////////////////////////
3747 
////                                                              ////
3748 
////  Versatile library, memories                                 ////
3749 
////                                                              ////
3750 
////  Description                                                 ////
3751 
////  memories                                                    ////
3752 
////                                                              ////
3753 
////                                                              ////
3754 
////  To Do:                                                      ////
3755 
////   - add more memory types                                    ////
3756 
////                                                              ////
3757 
////  Author(s):                                                  ////
3758 
////      - Michael Unneback, unneback@opencores.org              ////
3759 
////        ORSoC AB                                              ////
3760 
////                                                              ////
3761 
//////////////////////////////////////////////////////////////////////
3762 
////                                                              ////
3763 
//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////
3764 
////                                                              ////
3765 
//// This source file may be used and distributed without         ////
3766 
//// restriction provided that this copyright statement is not    ////
3767 
//// removed from the file and that any derivative work contains  ////
3768 
//// the original copyright notice and the associated disclaimer. ////
3769 
////                                                              ////
3770 
//// This source file is free software; you can redistribute it   ////
3771 
//// and/or modify it under the terms of the GNU Lesser General   ////
3772 
//// Public License as published by the Free Software Foundation; ////
3773 
//// either version 2.1 of the License, or (at your option) any   ////
3774 
//// later version.                                               ////
3775 
////                                                              ////
3776 
//// This source is distributed in the hope that it will be       ////
3777 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
3778 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
3779 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
3780 
//// details.                                                     ////
3781 
////                                                              ////
3782 
//// You should have received a copy of the GNU Lesser General    ////
3783 
//// Public License along with this source; if not, download it   ////
3784 
//// from http://www.opencores.org/lgpl.shtml                     ////
3785 
////                                                              ////
3786 
//////////////////////////////////////////////////////////////////////
3787 
 
3788 40 unneback 
`ifdef ROM_INIT
3789 6 unneback 
/// ROM
3790 40 unneback 
`define MODULE rom_init
3791 
module `BASE`MODULE ( adr, q, clk);
3792 
`undef MODULE
3793 6 unneback 
 
3794 7 unneback 
   parameter data_width = 32;
3795 
   parameter addr_width = 8;
3796 75 unneback 
   parameter mem_size = 1<<addr_width;
3797 7 unneback 
   input [(addr_width-1):0]       adr;
3798 
   output reg [(data_width-1):0] q;
3799 
   input                         clk;
3800 75 unneback 
   reg [data_width-1:0] rom [mem_size-1:0];
3801 7 unneback 
   parameter memory_file = "vl_rom.vmem";
3802 
   initial
3803 
     begin
3804 
        $readmemh(memory_file, rom);
3805 
     end
3806 
 
3807 
   always @ (posedge clk)
3808 
     q <= rom[adr];
3809 6 unneback 
 
3810 7 unneback 
endmodule
3811 40 unneback 
`endif
3812 7 unneback 
 
3813 40 unneback 
`ifdef RAM
3814 
`define MODULE ram
3815 6 unneback 
// Single port RAM
3816 40 unneback 
module `BASE`MODULE ( d, adr, we, q, clk);
3817 
`undef MODULE
3818 6 unneback 
 
3819 
   parameter data_width = 32;
3820 
   parameter addr_width = 8;
3821 75 unneback 
   parameter mem_size = 1<<addr_width;
3822 100 unneback 
   parameter debug = 0;
3823 6 unneback 
   input [(data_width-1):0]      d;
3824 
   input [(addr_width-1):0]       adr;
3825 
   input                         we;
3826 7 unneback 
   output reg [(data_width-1):0] q;
3827 6 unneback 
   input                         clk;
3828 98 unneback 
   reg [data_width-1:0] ram [mem_size-1:0];
3829 100 unneback 
 
3830 
    parameter memory_init = 0;
3831 
    parameter memory_file = "vl_ram.vmem";
3832 
    generate
3833 
    if (memory_init == 1) begin : init_mem
3834 
        initial
3835 
            $readmemh(memory_file, ram);
3836 
   end else if (memory_init == 2) begin : init_zero
3837 
        integer k;
3838 
        initial
3839 
            for (k = 0; k < mem_size; k = k + 1)
3840 
                ram[k] = 0;
3841 7 unneback 
   end
3842 
   endgenerate
3843 
 
3844 100 unneback 
    generate
3845 
    if (debug==1) begin : debug_we
3846 
        always @ (posedge clk)
3847 
        if (we)
3848 
            $display ("Value %h written at address %h : time %t", d, adr, $time);
3849 
 
3850 
    end
3851 
    endgenerate
3852 
 
3853 6 unneback 
   always @ (posedge clk)
3854 
   begin
3855 
   if (we)
3856 
     ram[adr] <= d;
3857 
   q <= ram[adr];
3858 
   end
3859 
 
3860 
endmodule
3861 40 unneback 
`endif
3862 6 unneback 
 
3863 40 unneback 
`ifdef RAM_BE
3864 
`define MODULE ram_be
3865 91 unneback 
module `BASE`MODULE ( d, adr, be, we, q, clk);
3866 40 unneback 
`undef MODULE
3867 
 
3868 7 unneback 
   parameter data_width = 32;
3869 72 unneback 
   parameter addr_width = 6;
3870 75 unneback 
   parameter mem_size = 1<<addr_width;
3871 7 unneback 
   input [(data_width-1):0]      d;
3872 
   input [(addr_width-1):0]       adr;
3873 73 unneback 
   input [(data_width/8)-1:0]    be;
3874 7 unneback 
   input                         we;
3875 
   output reg [(data_width-1):0] q;
3876 
   input                         clk;
3877 
 
3878 85 unneback 
 
3879 65 unneback 
`ifdef SYSTEMVERILOG
3880 95 unneback 
    // use a multi-dimensional packed array
3881 
    //t o model individual bytes within the word
3882 
    logic [data_width/8-1:0][7:0] ram [0:mem_size-1];// # words = 1 << address width
3883 65 unneback 
`else
3884 85 unneback 
    reg [data_width-1:0] ram [mem_size-1:0];
3885 
    wire [data_width/8-1:0] cke;
3886 65 unneback 
`endif
3887 
 
3888 100 unneback 
    parameter memory_init = 0;
3889 
    parameter memory_file = "vl_ram.vmem";
3890 
    generate
3891 
    if (memory_init == 1) begin : init_mem
3892 
        initial
3893 
            $readmemh(memory_file, ram);
3894 
    end else if (memory_init == 2) begin : init_zero
3895 
        integer k;
3896 
        initial
3897 
            for (k = 0; k < mem_size; k = k + 1)
3898 
                ram[k] = 0;
3899 
    end
3900 7 unneback 
   endgenerate
3901 
 
3902 60 unneback 
`ifdef SYSTEMVERILOG
3903 
 
3904 
always_ff@(posedge clk)
3905 
begin
3906 95 unneback 
    if(we) begin
3907 86 unneback 
        if(be[3]) ram[adr][3] <= d[31:24];
3908 
        if(be[2]) ram[adr][2] <= d[23:16];
3909 
        if(be[1]) ram[adr][1] <= d[15:8];
3910 
        if(be[0]) ram[adr][0] <= d[7:0];
3911 60 unneback 
    end
3912 90 unneback 
        q <= ram[adr];
3913 60 unneback 
end
3914 
 
3915 
`else
3916 
 
3917 85 unneback 
assign cke = {data_width/8{we}} & be;
3918 7 unneback 
   genvar i;
3919 85 unneback 
   generate for (i=0;i<data_width/8;i=i+1) begin : be_ram
3920 7 unneback 
      always @ (posedge clk)
3921 85 unneback 
      if (cke[i])
3922 7 unneback 
        ram[adr][(i+1)*8-1:i*8] <= d[(i+1)*8-1:i*8];
3923 
   end
3924 
   endgenerate
3925 
 
3926 
   always @ (posedge clk)
3927 
      q <= ram[adr];
3928 
 
3929 60 unneback 
`endif
3930 
 
3931 93 unneback 
`ifdef verilator
3932 85 unneback 
   // Function to access RAM (for use by Verilator).
3933 
   function [31:0] get_mem;
3934 
      // verilator public
3935 90 unneback 
      input [addr_width-1:0]             addr;
3936 85 unneback 
      get_mem = ram[addr];
3937 
   endfunction // get_mem
3938 
 
3939 
   // Function to write RAM (for use by Verilator).
3940 
   function set_mem;
3941 
      // verilator public
3942 90 unneback 
      input [addr_width-1:0]             addr;
3943 
      input [data_width-1:0]             data;
3944 85 unneback 
      ram[addr] = data;
3945 
   endfunction // set_mem
3946 93 unneback 
`endif
3947 85 unneback 
 
3948 7 unneback 
endmodule
3949 40 unneback 
`endif
3950 7 unneback 
 
3951 40 unneback 
`ifdef DPRAM_1R1W
3952 
`define MODULE dpram_1r1w
3953 
module `BASE`MODULE ( d_a, adr_a, we_a, clk_a, q_b, adr_b, clk_b );
3954 
`undef MODULE
3955 6 unneback 
   parameter data_width = 32;
3956 
   parameter addr_width = 8;
3957 75 unneback 
   parameter mem_size = 1<<addr_width;
3958 6 unneback 
   input [(data_width-1):0]      d_a;
3959 
   input [(addr_width-1):0]       adr_a;
3960 
   input [(addr_width-1):0]       adr_b;
3961 
   input                         we_a;
3962 
   output [(data_width-1):0]      q_b;
3963 
   input                         clk_a, clk_b;
3964 
   reg [(addr_width-1):0]         adr_b_reg;
3965 100 unneback 
   reg [data_width-1:0] ram [mem_size-1:0] `SYN_NO_RW_CHECK;
3966 7 unneback 
 
3967 100 unneback 
    parameter memory_init = 0;
3968 
    parameter memory_file = "vl_ram.vmem";
3969 
    parameter debug = 0;
3970 
 
3971 
    generate
3972 
    if (memory_init == 1) begin : init_mem
3973 
        initial
3974 
            $readmemh(memory_file, ram);
3975 
    end else if (memory_init == 2) begin : init_zero
3976 
        integer k;
3977 
        initial
3978 
            for (k = 0; k < mem_size; k = k + 1)
3979 
                ram[k] = 0;
3980 
    end
3981 7 unneback 
   endgenerate
3982 
 
3983 100 unneback 
    generate
3984 
    if (debug==1) begin : debug_we
3985 
        always @ (posedge clk_a)
3986 
        if (we_a)
3987 
            $display ("Debug: Value %h written at address %h : time %t", d_a, adr_a, $time);
3988 
 
3989 
    end
3990 
    endgenerate
3991 
 
3992 6 unneback 
   always @ (posedge clk_a)
3993 
   if (we_a)
3994 
     ram[adr_a] <= d_a;
3995 
   always @ (posedge clk_b)
3996 
   adr_b_reg <= adr_b;
3997 
   assign q_b = ram[adr_b_reg];
3998 40 unneback 
 
3999 6 unneback 
endmodule
4000 40 unneback 
`endif
4001 6 unneback 
 
4002 40 unneback 
`ifdef DPRAM_2R1W
4003 
`define MODULE dpram_2r1w
4004 
module `BASE`MODULE ( d_a, q_a, adr_a, we_a, clk_a, q_b, adr_b, clk_b );
4005 
`undef MODULE
4006 
 
4007 6 unneback 
   parameter data_width = 32;
4008 
   parameter addr_width = 8;
4009 75 unneback 
   parameter mem_size = 1<<addr_width;
4010 6 unneback 
   input [(data_width-1):0]      d_a;
4011 
   input [(addr_width-1):0]       adr_a;
4012 
   input [(addr_width-1):0]       adr_b;
4013 
   input                         we_a;
4014 
   output [(data_width-1):0]      q_b;
4015 
   output reg [(data_width-1):0] q_a;
4016 
   input                         clk_a, clk_b;
4017 
   reg [(data_width-1):0]         q_b;
4018 98 unneback 
   reg [data_width-1:0] ram [mem_szie-1:0] `SYN_NO_RW_CHECK;
4019 7 unneback 
 
4020 100 unneback 
    parameter memory_init = 0;
4021 
    parameter memory_file = "vl_ram.vmem";
4022 
    parameter debug = 0;
4023 
 
4024 
    generate
4025 
    if (memory_init == 1) begin : init_mem
4026 
        initial
4027 
            $readmemh(memory_file, ram);
4028 
    end else if (memory_init == 2) begin : init_zero
4029 
        integer k;
4030 
        initial
4031 
            for (k = 0; k < mem_size; k = k + 1)
4032 
                ram[k] = 0;
4033 
    end
4034 7 unneback 
   endgenerate
4035 
 
4036 100 unneback 
    generate
4037 
    if (debug==1) begin : debug_we
4038 
        always @ (posedge clk_a)
4039 
        if (we_a)
4040 
            $display ("Debug: Value %h written at address %h : time %t", d_a, adr_a, $time);
4041 
 
4042 
    end
4043 
    endgenerate
4044 
 
4045 6 unneback 
   always @ (posedge clk_a)
4046 
     begin
4047 
        q_a <= ram[adr_a];
4048 
        if (we_a)
4049 
             ram[adr_a] <= d_a;
4050 
     end
4051 
   always @ (posedge clk_b)
4052 
          q_b <= ram[adr_b];
4053 
endmodule
4054 40 unneback 
`endif
4055 6 unneback 
 
4056 100 unneback 
`ifdef DPRAM_1R2W
4057 
`define MODULE dpram_1r2w
4058 
module `BASE`MODULE ( d_a, q_a, adr_a, we_a, clk_a, d_b, adr_b, we_b, clk_b );
4059 
`undef MODULE
4060 
 
4061 
   parameter data_width = 32;
4062 
   parameter addr_width = 8;
4063 
   parameter mem_size = 1<<addr_width;
4064 
   input [(data_width-1):0]      d_a;
4065 
   input [(addr_width-1):0]       adr_a;
4066 
   input [(addr_width-1):0]       adr_b;
4067 
   input                         we_a;
4068 
   input [(data_width-1):0]       d_b;
4069 
   output reg [(data_width-1):0] q_a;
4070 
   input                         we_b;
4071 
   input                         clk_a, clk_b;
4072 
   reg [(data_width-1):0]         q_b;
4073 
   reg [data_width-1:0] ram [mem_size-1:0] `SYN_NO_RW_CHECK;
4074 
 
4075 
    parameter memory_init = 0;
4076 
    parameter memory_file = "vl_ram.vmem";
4077 
    parameter debug = 0;
4078 
 
4079 
    generate
4080 
    if (memory_init == 1) begin : init_mem
4081 
        initial
4082 
            $readmemh(memory_file, ram);
4083 
    end else if (memory_init == 2) begin : init_zero
4084 
        integer k;
4085 
        initial
4086 
            for (k = 0; k < mem_size; k = k + 1)
4087 
                ram[k] = 0;
4088 
    end
4089 
   endgenerate
4090 
 
4091 
    generate
4092 
    if (debug==1) begin : debug_we
4093 
        always @ (posedge clk_a)
4094 
        if (we_a)
4095 
            $display ("Debug: Value %h written at address %h : time %t", d_a, adr_a, $time);
4096 
        always @ (posedge clk_b)
4097 
        if (we_b)
4098 
            $display ("Debug: Value %h written at address %h : time %t", d_b, adr_b, $time);
4099 
    end
4100 
    endgenerate
4101 
 
4102 
   always @ (posedge clk_a)
4103 
     begin
4104 
        q_a <= ram[adr_a];
4105 
        if (we_a)
4106 
             ram[adr_a] <= d_a;
4107 
     end
4108 
   always @ (posedge clk_b)
4109 
     begin
4110 
        if (we_b)
4111 
          ram[adr_b] <= d_b;
4112 
     end
4113 
endmodule
4114 
`endif
4115 
 
4116 40 unneback 
`ifdef DPRAM_2R2W
4117 
`define MODULE dpram_2r2w
4118 
module `BASE`MODULE ( d_a, q_a, adr_a, we_a, clk_a, d_b, q_b, adr_b, we_b, clk_b );
4119 
`undef MODULE
4120 
 
4121 6 unneback 
   parameter data_width = 32;
4122 
   parameter addr_width = 8;
4123 75 unneback 
   parameter mem_size = 1<<addr_width;
4124 6 unneback 
   input [(data_width-1):0]      d_a;
4125 
   input [(addr_width-1):0]       adr_a;
4126 
   input [(addr_width-1):0]       adr_b;
4127 
   input                         we_a;
4128 
   output [(data_width-1):0]      q_b;
4129 
   input [(data_width-1):0]       d_b;
4130 
   output reg [(data_width-1):0] q_a;
4131 
   input                         we_b;
4132 
   input                         clk_a, clk_b;
4133 
   reg [(data_width-1):0]         q_b;
4134 98 unneback 
   reg [data_width-1:0] ram [mem_size-1:0] `SYN_NO_RW_CHECK;
4135 7 unneback 
 
4136 100 unneback 
    parameter memory_init = 0;
4137 
    parameter memory_file = "vl_ram.vmem";
4138 
    parameter debug = 0;
4139 
 
4140 
    generate
4141 
    if (memory_init) begin : init_mem
4142 
        initial
4143 
            $readmemh(memory_file, ram);
4144 
    end else if (memory_init == 2) begin : init_zero
4145 
        integer k;
4146 
        initial
4147 
            for (k = 0; k < mem_size; k = k + 1)
4148 
                ram[k] = 0;
4149 
    end
4150 7 unneback 
   endgenerate
4151 
 
4152 100 unneback 
    generate
4153 
    if (debug==1) begin : debug_we
4154 
        always @ (posedge clk_a)
4155 
        if (we_a)
4156 
            $display ("Debug: Value %h written at address %h : time %t", d_a, adr_a, $time);
4157 
        always @ (posedge clk_b)
4158 
        if (we_b)
4159 
            $display ("Debug: Value %h written at address %h : time %t", d_b, adr_b, $time);
4160 
    end
4161 
    endgenerate
4162 
 
4163 6 unneback 
   always @ (posedge clk_a)
4164 
     begin
4165 
        q_a <= ram[adr_a];
4166 
        if (we_a)
4167 
             ram[adr_a] <= d_a;
4168 
     end
4169 
   always @ (posedge clk_b)
4170 
     begin
4171 
        q_b <= ram[adr_b];
4172 
        if (we_b)
4173 
          ram[adr_b] <= d_b;
4174 
     end
4175 
endmodule
4176 40 unneback 
`endif
4177 6 unneback 
 
4178 83 unneback 
 
4179 75 unneback 
`ifdef DPRAM_BE_2R2W
4180 
`define MODULE dpram_be_2r2w
4181 92 unneback 
module `BASE`MODULE ( d_a, q_a, adr_a, be_a, we_a, clk_a, d_b, q_b, adr_b, be_b, we_b, clk_b );
4182 75 unneback 
`undef MODULE
4183 
 
4184 
   parameter a_data_width = 32;
4185 
   parameter a_addr_width = 8;
4186 95 unneback 
   parameter b_data_width = 64; //a_data_width;
4187 91 unneback 
   localparam b_addr_width = a_data_width * a_addr_width / b_data_width;
4188 95 unneback 
   localparam ratio = (a_addr_width>b_addr_width) ? (a_addr_width/b_addr_width) : (b_addr_width/a_addr_width);
4189 
   parameter mem_size = (a_addr_width>b_addr_width) ? (1<<b_addr_width) : (1<<a_addr_width);
4190 91 unneback 
 
4191 100 unneback 
   parameter memory_init = 0;
4192 95 unneback 
   parameter memory_file = "vl_ram.vmem";
4193 100 unneback 
   parameter debug = 0;
4194 95 unneback 
 
4195 75 unneback 
   input [(a_data_width-1):0]      d_a;
4196 91 unneback 
   input [(a_addr_width-1):0]       adr_a;
4197 
   input [(a_data_width/8-1):0]    be_a;
4198 
   input                           we_a;
4199 75 unneback 
   output reg [(a_data_width-1):0] q_a;
4200 91 unneback 
   input [(b_data_width-1):0]       d_b;
4201 
   input [(b_addr_width-1):0]       adr_b;
4202 92 unneback 
   input [(b_data_width/8-1):0]    be_b;
4203 
   input                           we_b;
4204 
   output reg [(b_data_width-1):0]          q_b;
4205 91 unneback 
   input                           clk_a, clk_b;
4206 75 unneback 
 
4207 100 unneback 
    generate
4208 
    if (debug==1) begin : debug_we
4209 
        always @ (posedge clk_a)
4210 
        if (we_a)
4211 
            $display ("Debug: Value %h written at address %h : time %t", d_a, adr_a, $time);
4212 
        always @ (posedge clk_b)
4213 
        if (we_b)
4214 
            $display ("Debug: Value %h written at address %h : time %t", d_b, adr_b, $time);
4215 
    end
4216 
    endgenerate
4217 
 
4218 
 
4219 91 unneback 
`ifdef SYSTEMVERILOG
4220 
// use a multi-dimensional packed array
4221 
//to model individual bytes within the word
4222 
 
4223 75 unneback 
generate
4224 91 unneback 
if (a_data_width==32 & b_data_width==32) begin : dpram_3232
4225 75 unneback 
 
4226 98 unneback 
    logic [0:3][7:0] ram [0:mem_size-1] `SYN_NO_RW_CHECK;
4227 95 unneback 
 
4228 
    initial
4229 100 unneback 
        if (memory_init==1)
4230 95 unneback 
            $readmemh(memory_file, ram);
4231 100 unneback 
 
4232 
    integer k;
4233 
    initial
4234 
        if (memory_init==2)
4235 
            for (k = 0; k < mem_size; k = k + 1)
4236 
                ram[k] = 0;
4237 91 unneback 
 
4238 
    always_ff@(posedge clk_a)
4239 
    begin
4240 
        if(we_a) begin
4241 100 unneback 
            if(be_a[3]) ram[adr_a][0] <= d_a[31:24];
4242 
            if(be_a[2]) ram[adr_a][1] <= d_a[23:16];
4243 
            if(be_a[1]) ram[adr_a][2] <= d_a[15:8];
4244 
            if(be_a[0]) ram[adr_a][3] <= d_a[7:0];
4245 91 unneback 
        end
4246 
    end
4247 
 
4248 92 unneback 
    always@(posedge clk_a)
4249 
        q_a = ram[adr_a];
4250 91 unneback 
 
4251 
    always_ff@(posedge clk_b)
4252 92 unneback 
    begin
4253 
        if(we_b) begin
4254 100 unneback 
            if(be_b[3]) ram[adr_b][0] <= d_b[31:24];
4255 
            if(be_b[2]) ram[adr_b][1] <= d_b[23:16];
4256 
            if(be_b[1]) ram[adr_b][2] <= d_b[15:8];
4257 
            if(be_b[0]) ram[adr_b][3] <= d_b[7:0];
4258 92 unneback 
        end
4259 
    end
4260 91 unneback 
 
4261 92 unneback 
    always@(posedge clk_b)
4262 
        q_b = ram[adr_b];
4263 91 unneback 
 
4264 75 unneback 
end
4265 
endgenerate
4266 
 
4267 95 unneback 
generate
4268 
if (a_data_width==64 & b_data_width==64) begin : dpram_6464
4269 
 
4270 98 unneback 
    logic [0:7][7:0] ram [0:mem_size-1] `SYN_NO_RW_CHECK;
4271 95 unneback 
 
4272 
    initial
4273 100 unneback 
        if (memory_init==1)
4274 95 unneback 
            $readmemh(memory_file, ram);
4275 100 unneback 
 
4276 
    integer k;
4277 
    initial
4278 
        if (memory_init==2)
4279 
            for (k = 0; k < mem_size; k = k + 1)
4280 
                ram[k] = 0;
4281 95 unneback 
 
4282 
    always_ff@(posedge clk_a)
4283 
    begin
4284 
        if(we_a) begin
4285 
            if(be_a[7]) ram[adr_a][7] <= d_a[63:56];
4286 
            if(be_a[6]) ram[adr_a][6] <= d_a[55:48];
4287 
            if(be_a[5]) ram[adr_a][5] <= d_a[47:40];
4288 
            if(be_a[4]) ram[adr_a][4] <= d_a[39:32];
4289 
            if(be_a[3]) ram[adr_a][3] <= d_a[31:24];
4290 
            if(be_a[2]) ram[adr_a][2] <= d_a[23:16];
4291 
            if(be_a[1]) ram[adr_a][1] <= d_a[15:8];
4292 
            if(be_a[0]) ram[adr_a][0] <= d_a[7:0];
4293 
        end
4294 
    end
4295 
 
4296 
    always@(posedge clk_a)
4297 
        q_a = ram[adr_a];
4298 
 
4299 
    always_ff@(posedge clk_b)
4300 
    begin
4301 
        if(we_b) begin
4302 
            if(be_b[7]) ram[adr_b][7] <= d_b[63:56];
4303 
            if(be_b[6]) ram[adr_b][6] <= d_b[55:48];
4304 
            if(be_b[5]) ram[adr_b][5] <= d_b[47:40];
4305 
            if(be_b[4]) ram[adr_b][4] <= d_b[39:32];
4306 
            if(be_b[3]) ram[adr_b][3] <= d_b[31:24];
4307 
            if(be_b[2]) ram[adr_b][2] <= d_b[23:16];
4308 
            if(be_b[1]) ram[adr_b][1] <= d_b[15:8];
4309 
            if(be_b[0]) ram[adr_b][0] <= d_b[7:0];
4310 
        end
4311 
    end
4312 
 
4313 
    always@(posedge clk_b)
4314 
        q_b = ram[adr_b];
4315 
 
4316 
end
4317 
endgenerate
4318 
 
4319 
generate
4320 
if (a_data_width==32 & b_data_width==16) begin : dpram_3216
4321 
logic [31:0] temp;
4322 
`define MODULE dpram_be_2r2w
4323 100 unneback 
`BASE`MODULE # (.a_data_width(64), .b_data_width(64), .a_addr_width(a_addr_width), .mem_size(mem_size), .init(memory_init), .memory_file(memory_file))
4324 95 unneback 
`undef MODULE
4325 
dpram6464 (
4326 
    .d_a(d_a),
4327 
    .q_a(q_a),
4328 
    .adr_a(adr_a),
4329 
    .be_a(be_a),
4330 
    .we_a(we_a),
4331 
    .clk_a(clk_a),
4332 
    .d_b({d_b,d_b}),
4333 
    .q_b(temp),
4334 
    .adr_b(adr_b),
4335 
    .be_b({be_b,be_b} & {{2{adr_b[0]}},{2{!adr_b[0]}}}),
4336 
    .we_b(we_b),
4337 
    .clk_b(clk_b)
4338 
);
4339 
 
4340 100 unneback 
always @ (adr_b[0] or temp)
4341 95 unneback 
    if (adr_b[0])
4342 
        q_b = temp[31:16];
4343 
    else
4344 
        q_b = temp[15:0];
4345 
 
4346 
end
4347 
endgenerate
4348 
 
4349 
generate
4350 
if (a_data_width==32 & b_data_width==64) begin : dpram_3264
4351 
logic [63:0] temp;
4352 
`define MODULE dpram_be_2r2w
4353 100 unneback 
`BASE`MODULE # (.a_data_width(64), .b_data_width(64), .a_addr_width(a_addr_width), .mem_size(mem_size), .init(memory_init), .memory_file(memory_file))
4354 95 unneback 
`undef MODULE
4355 
dpram6464 (
4356 
    .d_a({d_a,d_a}),
4357 
    .q_a(temp),
4358 
    .adr_a(adr_a[a_addr_width-1:1]),
4359 
    .be_a({be_a,be_a} & {{4{adr_a[0]}},{4{!adr_a[0]}}}),
4360 
    .we_a(we_a),
4361 
    .clk_a(clk_a),
4362 
    .d_b(d_b),
4363 
    .q_b(q_b),
4364 
    .adr_b(adr_b),
4365 
    .be_b(be_b),
4366 
    .we_b(we_b),
4367 
    .clk_b(clk_b)
4368 
);
4369 
 
4370 100 unneback 
always @ (adr_a[0] or temp)
4371 95 unneback 
    if (adr_a[0])
4372 
        q_a = temp[63:32];
4373 
    else
4374 
        q_a = temp[31:0];
4375 
 
4376 
end
4377 
endgenerate
4378 
 
4379 91 unneback 
`else
4380 92 unneback 
    // This modules requires SystemVerilog
4381 98 unneback 
    // at this point anyway
4382 91 unneback 
`endif
4383 75 unneback 
endmodule
4384 
`endif
4385 
 
4386 91 unneback 
`ifdef CAM
4387 6 unneback 
// Content addresable memory, CAM
4388 91 unneback 
`endif
4389 6 unneback 
 
4390 40 unneback 
`ifdef FIFO_1R1W_FILL_LEVEL_SYNC
4391 6 unneback 
// FIFO
4392 40 unneback 
`define MODULE fifo_1r1w_fill_level_sync
4393 
module `BASE`MODULE (
4394 
`undef MODULE
4395 25 unneback 
    d, wr, fifo_full,
4396 
    q, rd, fifo_empty,
4397 
    fill_level,
4398 
    clk, rst
4399 
    );
4400 
 
4401 
parameter data_width = 18;
4402 
parameter addr_width = 4;
4403 6 unneback 
 
4404 25 unneback 
// write side
4405 
input  [data_width-1:0] d;
4406 
input                   wr;
4407 
output                  fifo_full;
4408 
// read side
4409 
output [data_width-1:0] q;
4410 
input                   rd;
4411 
output                  fifo_empty;
4412 
// common
4413 
output [addr_width:0]   fill_level;
4414 
input rst, clk;
4415 
 
4416 
wire [addr_width:1] wadr, radr;
4417 
 
4418 40 unneback 
`define MODULE cnt_bin_ce
4419 
`BASE`MODULE
4420 25 unneback 
    # ( .length(addr_width))
4421 
    fifo_wr_adr( .cke(wr), .q(wadr), .rst(rst), .clk(clk));
4422 40 unneback 
`BASE`MODULE
4423 25 unneback 
    # (.length(addr_width))
4424 
    fifo_rd_adr( .cke(rd), .q(radr), .rst(rst), .clk(clk));
4425 40 unneback 
`undef MODULE
4426 25 unneback 
 
4427 40 unneback 
`define MODULE dpram_1r1w
4428 
`BASE`MODULE
4429 25 unneback 
    # (.data_width(data_width), .addr_width(addr_width))
4430 
    dpram ( .d_a(d), .adr_a(wadr), .we_a(wr), .clk_a(clk), .q_b(q), .adr_b(radr), .clk_b(clk));
4431 40 unneback 
`undef MODULE
4432 25 unneback 
 
4433 40 unneback 
`define MODULE cnt_bin_ce_rew_q_zq_l1
4434 
`BASE`MODULE
4435 27 unneback 
    # (.length(addr_width+1), .level1_value(1<<addr_width))
4436 25 unneback 
    fill_level_cnt( .cke(rd ^ wr), .rew(rd), .q(fill_level), .zq(fifo_empty), .level1(fifo_full), .rst(rst), .clk(clk));
4437 40 unneback 
`undef MODULE
4438 25 unneback 
endmodule
4439 40 unneback 
`endif
4440 25 unneback 
 
4441 40 unneback 
`ifdef FIFO_2R2W_SYNC_SIMPLEX
4442 27 unneback 
// Intended use is two small FIFOs (RX and TX typically) in one FPGA RAM resource
4443 
// RAM is supposed to be larger than the two FIFOs
4444 
// LFSR counters used adr pointers
4445 40 unneback 
`define MODULE fifo_2r2w_sync_simplex
4446 
module `BASE`MODULE (
4447 
`undef MODULE
4448 27 unneback 
    // a side
4449 
    a_d, a_wr, a_fifo_full,
4450 
    a_q, a_rd, a_fifo_empty,
4451 
    a_fill_level,
4452 
    // b side
4453 
    b_d, b_wr, b_fifo_full,
4454 
    b_q, b_rd, b_fifo_empty,
4455 
    b_fill_level,
4456 
    // common
4457 
    clk, rst
4458 
    );
4459 
parameter data_width = 8;
4460 
parameter addr_width = 5;
4461 
parameter fifo_full_level = (1<<addr_width)-1;
4462 
 
4463 
// a side
4464 
input  [data_width-1:0] a_d;
4465 
input                   a_wr;
4466 
output                  a_fifo_full;
4467 
output [data_width-1:0] a_q;
4468 
input                   a_rd;
4469 
output                  a_fifo_empty;
4470 
output [addr_width-1:0] a_fill_level;
4471 
 
4472 
// b side
4473 
input  [data_width-1:0] b_d;
4474 
input                   b_wr;
4475 
output                  b_fifo_full;
4476 
output [data_width-1:0] b_q;
4477 
input                   b_rd;
4478 
output                  b_fifo_empty;
4479 
output [addr_width-1:0] b_fill_level;
4480 
 
4481 
input                   clk;
4482 
input                   rst;
4483 
 
4484 
// adr_gen
4485 
wire [addr_width:1] a_wadr, a_radr;
4486 
wire [addr_width:1] b_wadr, b_radr;
4487 
// dpram
4488 
wire [addr_width:0] a_dpram_adr, b_dpram_adr;
4489 
 
4490 40 unneback 
`define MODULE cnt_lfsr_ce
4491 
`BASE`MODULE
4492 27 unneback 
    # ( .length(addr_width))
4493 
    fifo_a_wr_adr( .cke(a_wr), .q(a_wadr), .rst(rst), .clk(clk));
4494 
 
4495 40 unneback 
`BASE`MODULE
4496 27 unneback 
    # (.length(addr_width))
4497 
    fifo_a_rd_adr( .cke(a_rd), .q(a_radr), .rst(rst), .clk(clk));
4498 
 
4499 40 unneback 
`BASE`MODULE
4500 27 unneback 
    # ( .length(addr_width))
4501 
    fifo_b_wr_adr( .cke(b_wr), .q(b_wadr), .rst(rst), .clk(clk));
4502 
 
4503 40 unneback 
`BASE`MODULE
4504 27 unneback 
    # (.length(addr_width))
4505 
    fifo_b_rd_adr( .cke(b_rd), .q(b_radr), .rst(rst), .clk(clk));
4506 40 unneback 
`undef MODULE
4507 27 unneback 
 
4508 
// mux read or write adr to DPRAM
4509 
assign a_dpram_adr = (a_wr) ? {1'b0,a_wadr} : {1'b1,a_radr};
4510 
assign b_dpram_adr = (b_wr) ? {1'b1,b_wadr} : {1'b0,b_radr};
4511 
 
4512 40 unneback 
`define MODULE dpram_2r2w
4513 
`BASE`MODULE
4514 27 unneback 
    # (.data_width(data_width), .addr_width(addr_width+1))
4515 
    dpram ( .d_a(a_d), .q_a(a_q), .adr_a(a_dpram_adr), .we_a(a_wr), .clk_a(a_clk),
4516 
            .d_b(b_d), .q_b(b_q), .adr_b(b_dpram_adr), .we_b(b_wr), .clk_b(b_clk));
4517 40 unneback 
`undef MODULE
4518 
 
4519 
`define MODULE cnt_bin_ce_rew_zq_l1
4520 
`BASE`MODULE
4521 28 unneback 
    # (.length(addr_width), .level1_value(fifo_full_level))
4522 27 unneback 
    a_fill_level_cnt( .cke(a_rd ^ a_wr), .rew(a_rd), .q(a_fill_level), .zq(a_fifo_empty), .level1(a_fifo_full), .rst(rst), .clk(clk));
4523 
 
4524 40 unneback 
`BASE`MODULE
4525 28 unneback 
    # (.length(addr_width), .level1_value(fifo_full_level))
4526 27 unneback 
    b_fill_level_cnt( .cke(b_rd ^ b_wr), .rew(b_rd), .q(b_fill_level), .zq(b_fifo_empty), .level1(b_fifo_full), .rst(rst), .clk(clk));
4527 40 unneback 
`undef MODULE
4528 27 unneback 
 
4529 
endmodule
4530 40 unneback 
`endif
4531 27 unneback 
 
4532 40 unneback 
`ifdef FIFO_CMP_ASYNC
4533 
`define MODULE fifo_cmp_async
4534 
module `BASE`MODULE ( wptr, rptr, fifo_empty, fifo_full, wclk, rclk, rst );
4535 
`undef MODULE
4536 6 unneback 
 
4537 11 unneback 
   parameter addr_width = 4;
4538 
   parameter N = addr_width-1;
4539 6 unneback 
 
4540 
   parameter Q1 = 2'b00;
4541 
   parameter Q2 = 2'b01;
4542 
   parameter Q3 = 2'b11;
4543 
   parameter Q4 = 2'b10;
4544 
 
4545 
   parameter going_empty = 1'b0;
4546 
   parameter going_full  = 1'b1;
4547 
 
4548 
   input [N:0]  wptr, rptr;
4549 14 unneback 
   output       fifo_empty;
4550 6 unneback 
   output       fifo_full;
4551 
   input        wclk, rclk, rst;
4552 
 
4553 
`ifndef GENERATE_DIRECTION_AS_LATCH
4554 
   wire direction;
4555 
`endif
4556 
`ifdef GENERATE_DIRECTION_AS_LATCH
4557 
   reg direction;
4558 
`endif
4559 
   reg  direction_set, direction_clr;
4560 
 
4561 
   wire async_empty, async_full;
4562 
   wire fifo_full2;
4563 14 unneback 
   wire fifo_empty2;
4564 6 unneback 
 
4565 
   // direction_set
4566 
   always @ (wptr[N:N-1] or rptr[N:N-1])
4567 
     case ({wptr[N:N-1],rptr[N:N-1]})
4568 
       {Q1,Q2} : direction_set <= 1'b1;
4569 
       {Q2,Q3} : direction_set <= 1'b1;
4570 
       {Q3,Q4} : direction_set <= 1'b1;
4571 
       {Q4,Q1} : direction_set <= 1'b1;
4572 
       default : direction_set <= 1'b0;
4573 
     endcase
4574 
 
4575 
   // direction_clear
4576 
   always @ (wptr[N:N-1] or rptr[N:N-1] or rst)
4577 
     if (rst)
4578 
       direction_clr <= 1'b1;
4579 
     else
4580 
       case ({wptr[N:N-1],rptr[N:N-1]})
4581 
         {Q2,Q1} : direction_clr <= 1'b1;
4582 
         {Q3,Q2} : direction_clr <= 1'b1;
4583 
         {Q4,Q3} : direction_clr <= 1'b1;
4584 
         {Q1,Q4} : direction_clr <= 1'b1;
4585 
         default : direction_clr <= 1'b0;
4586 
       endcase
4587 
 
4588 40 unneback 
`define MODULE dff_sr
4589 6 unneback 
`ifndef GENERATE_DIRECTION_AS_LATCH
4590 40 unneback 
    `BASE`MODULE dff_sr_dir( .aclr(direction_clr), .aset(direction_set), .clock(1'b1), .data(1'b1), .q(direction));
4591 6 unneback 
`endif
4592 
 
4593 
`ifdef GENERATE_DIRECTION_AS_LATCH
4594 
   always @ (posedge direction_set or posedge direction_clr)
4595 
     if (direction_clr)
4596 
       direction <= going_empty;
4597 
     else
4598 
       direction <= going_full;
4599 
`endif
4600 
 
4601 
   assign async_empty = (wptr == rptr) && (direction==going_empty);
4602 
   assign async_full  = (wptr == rptr) && (direction==going_full);
4603 
 
4604 40 unneback 
    `BASE`MODULE dff_sr_empty0( .aclr(rst), .aset(async_full), .clock(wclk), .data(async_full), .q(fifo_full2));
4605 
    `BASE`MODULE dff_sr_empty1( .aclr(rst), .aset(async_full), .clock(wclk), .data(fifo_full2), .q(fifo_full));
4606 
`undef MODULE
4607 6 unneback 
 
4608 
/*
4609 
   always @ (posedge wclk or posedge rst or posedge async_full)
4610 
     if (rst)
4611 
       {fifo_full, fifo_full2} <= 2'b00;
4612 
     else if (async_full)
4613 
       {fifo_full, fifo_full2} <= 2'b11;
4614 
     else
4615 
       {fifo_full, fifo_full2} <= {fifo_full2, async_full};
4616 
*/
4617 14 unneback 
/*   always @ (posedge rclk or posedge async_empty)
4618 6 unneback 
     if (async_empty)
4619 
       {fifo_empty, fifo_empty2} <= 2'b11;
4620 
     else
4621 14 unneback 
       {fifo_empty,fifo_empty2} <= {fifo_empty2,async_empty}; */
4622 40 unneback 
`define MODULE dff
4623 
    `BASE`MODULE # ( .reset_value(1'b1)) dff0 ( .d(async_empty), .q(fifo_empty2), .clk(rclk), .rst(async_empty));
4624 
    `BASE`MODULE # ( .reset_value(1'b1)) dff1 ( .d(fifo_empty2), .q(fifo_empty),  .clk(rclk), .rst(async_empty));
4625 
`undef MODULE
4626 27 unneback 
endmodule // async_compb
4627 40 unneback 
`endif
4628 6 unneback 
 
4629 40 unneback 
`ifdef FIFO_1R1W_ASYNC
4630 
`define MODULE fifo_1r1w_async
4631 
module `BASE`MODULE (
4632 
`undef MODULE
4633 6 unneback 
    d, wr, fifo_full, wr_clk, wr_rst,
4634 
    q, rd, fifo_empty, rd_clk, rd_rst
4635 
    );
4636 
 
4637 
parameter data_width = 18;
4638 
parameter addr_width = 4;
4639 
 
4640 
// write side
4641 
input  [data_width-1:0] d;
4642 
input                   wr;
4643 
output                  fifo_full;
4644 
input                   wr_clk;
4645 
input                   wr_rst;
4646 
// read side
4647 
output [data_width-1:0] q;
4648 
input                   rd;
4649 
output                  fifo_empty;
4650 
input                   rd_clk;
4651 
input                   rd_rst;
4652 
 
4653 
wire [addr_width:1] wadr, wadr_bin, radr, radr_bin;
4654 23 unneback 
 
4655 40 unneback 
`define MODULE cnt_gray_ce_bin
4656 
`BASE`MODULE
4657 6 unneback 
    # ( .length(addr_width))
4658 
    fifo_wr_adr( .cke(wr), .q(wadr), .q_bin(wadr_bin), .rst(wr_rst), .clk(wr_clk));
4659 
 
4660 40 unneback 
`BASE`MODULE
4661 6 unneback 
    # (.length(addr_width))
4662 23 unneback 
    fifo_rd_adr( .cke(rd), .q(radr), .q_bin(radr_bin), .rst(rd_rst), .clk(rd_clk));
4663 40 unneback 
`undef MODULE
4664 6 unneback 
 
4665 40 unneback 
`define MODULE dpram_1r1w
4666 
`BASE`MODULE
4667 6 unneback 
    # (.data_width(data_width), .addr_width(addr_width))
4668 
    dpram ( .d_a(d), .adr_a(wadr_bin), .we_a(wr), .clk_a(wr_clk), .q_b(q), .adr_b(radr_bin), .clk_b(rd_clk));
4669 40 unneback 
`undef MODULE
4670 6 unneback 
 
4671 40 unneback 
`define MODULE fifo_cmp_async
4672 
`BASE`MODULE
4673 6 unneback 
    # (.addr_width(addr_width))
4674 
    cmp ( .wptr(wadr), .rptr(radr), .fifo_empty(fifo_empty), .fifo_full(fifo_full), .wclk(wr_clk), .rclk(rd_clk), .rst(wr_rst) );
4675 40 unneback 
`undef MODULE
4676 6 unneback 
 
4677 
endmodule
4678 40 unneback 
`endif
4679 6 unneback 
 
4680 40 unneback 
`ifdef FIFO_2R2W_ASYNC
4681 
`define MODULE fifo_2r2w_async
4682 
module `BASE`MODULE (
4683 
`undef MODULE
4684 6 unneback 
    // a side
4685 
    a_d, a_wr, a_fifo_full,
4686 
    a_q, a_rd, a_fifo_empty,
4687 
    a_clk, a_rst,
4688 
    // b side
4689 
    b_d, b_wr, b_fifo_full,
4690 
    b_q, b_rd, b_fifo_empty,
4691 
    b_clk, b_rst
4692 
    );
4693 
 
4694 
parameter data_width = 18;
4695 
parameter addr_width = 4;
4696 
 
4697 
// a side
4698 
input  [data_width-1:0] a_d;
4699 
input                   a_wr;
4700 
output                  a_fifo_full;
4701 
output [data_width-1:0] a_q;
4702 
input                   a_rd;
4703 
output                  a_fifo_empty;
4704 
input                   a_clk;
4705 
input                   a_rst;
4706 
 
4707 
// b side
4708 
input  [data_width-1:0] b_d;
4709 
input                   b_wr;
4710 
output                  b_fifo_full;
4711 
output [data_width-1:0] b_q;
4712 
input                   b_rd;
4713 
output                  b_fifo_empty;
4714 
input                   b_clk;
4715 
input                   b_rst;
4716 
 
4717 40 unneback 
`define MODULE fifo_1r1w_async
4718 
`BASE`MODULE # (.data_width(data_width), .addr_width(addr_width))
4719 6 unneback 
vl_fifo_1r1w_async_a (
4720 
    .d(a_d), .wr(a_wr), .fifo_full(a_fifo_full), .wr_clk(a_clk), .wr_rst(a_rst),
4721 
    .q(b_q), .rd(b_rd), .fifo_empty(b_fifo_empty), .rd_clk(b_clk), .rd_rst(b_rst)
4722 
    );
4723 
 
4724 40 unneback 
`BASE`MODULE # (.data_width(data_width), .addr_width(addr_width))
4725 6 unneback 
vl_fifo_1r1w_async_b (
4726 
    .d(b_d), .wr(b_wr), .fifo_full(b_fifo_full), .wr_clk(b_clk), .wr_rst(b_rst),
4727 
    .q(a_q), .rd(a_rd), .fifo_empty(a_fifo_empty), .rd_clk(a_clk), .rd_rst(a_rst)
4728 
    );
4729 40 unneback 
`undef MODULE
4730 
 
4731 6 unneback 
endmodule
4732 40 unneback 
`endif
4733 6 unneback 
 
4734 40 unneback 
`ifdef FIFO_2R2W_ASYNC_SIMPLEX
4735 
`define MODULE fifo_2r2w_async_simplex
4736 
module `BASE`MODULE (
4737 
`undef MODULE
4738 6 unneback 
    // a side
4739 
    a_d, a_wr, a_fifo_full,
4740 
    a_q, a_rd, a_fifo_empty,
4741 
    a_clk, a_rst,
4742 
    // b side
4743 
    b_d, b_wr, b_fifo_full,
4744 
    b_q, b_rd, b_fifo_empty,
4745 
    b_clk, b_rst
4746 
    );
4747 
 
4748 
parameter data_width = 18;
4749 
parameter addr_width = 4;
4750 
 
4751 
// a side
4752 
input  [data_width-1:0] a_d;
4753 
input                   a_wr;
4754 
output                  a_fifo_full;
4755 
output [data_width-1:0] a_q;
4756 
input                   a_rd;
4757 
output                  a_fifo_empty;
4758 
input                   a_clk;
4759 
input                   a_rst;
4760 
 
4761 
// b side
4762 
input  [data_width-1:0] b_d;
4763 
input                   b_wr;
4764 
output                  b_fifo_full;
4765 
output [data_width-1:0] b_q;
4766 
input                   b_rd;
4767 
output                  b_fifo_empty;
4768 
input                   b_clk;
4769 
input                   b_rst;
4770 
 
4771 
// adr_gen
4772 
wire [addr_width:1] a_wadr, a_wadr_bin, a_radr, a_radr_bin;
4773 
wire [addr_width:1] b_wadr, b_wadr_bin, b_radr, b_radr_bin;
4774 
// dpram
4775 
wire [addr_width:0] a_dpram_adr, b_dpram_adr;
4776 
 
4777 40 unneback 
`define MODULE cnt_gray_ce_bin
4778 
`BASE`MODULE
4779 6 unneback 
    # ( .length(addr_width))
4780 
    fifo_a_wr_adr( .cke(a_wr), .q(a_wadr), .q_bin(a_wadr_bin), .rst(a_rst), .clk(a_clk));
4781 
 
4782 40 unneback 
`BASE`MODULE
4783 6 unneback 
    # (.length(addr_width))
4784 
    fifo_a_rd_adr( .cke(a_rd), .q(a_radr), .q_bin(a_radr_bin), .rst(a_rst), .clk(a_clk));
4785 
 
4786 40 unneback 
`BASE`MODULE
4787 6 unneback 
    # ( .length(addr_width))
4788 
    fifo_b_wr_adr( .cke(b_wr), .q(b_wadr), .q_bin(b_wadr_bin), .rst(b_rst), .clk(b_clk));
4789 
 
4790 40 unneback 
`BASE`MODULE
4791 6 unneback 
    # (.length(addr_width))
4792 
    fifo_b_rd_adr( .cke(b_rd), .q(b_radr), .q_bin(b_radr_bin), .rst(b_rst), .clk(b_clk));
4793 40 unneback 
`undef MODULE
4794 6 unneback 
 
4795 
// mux read or write adr to DPRAM
4796 
assign a_dpram_adr = (a_wr) ? {1'b0,a_wadr_bin} : {1'b1,a_radr_bin};
4797 
assign b_dpram_adr = (b_wr) ? {1'b1,b_wadr_bin} : {1'b0,b_radr_bin};
4798 
 
4799 40 unneback 
`define MODULE dpram_2r2w
4800 
`BASE`MODULE
4801 6 unneback 
    # (.data_width(data_width), .addr_width(addr_width+1))
4802 
    dpram ( .d_a(a_d), .q_a(a_q), .adr_a(a_dpram_adr), .we_a(a_wr), .clk_a(a_clk),
4803 
            .d_b(b_d), .q_b(b_q), .adr_b(b_dpram_adr), .we_b(b_wr), .clk_b(b_clk));
4804 40 unneback 
`undef MODULE
4805 6 unneback 
 
4806 40 unneback 
`define MODULE fifo_cmp_async
4807 
`BASE`MODULE
4808 6 unneback 
    # (.addr_width(addr_width))
4809 
    cmp1 ( .wptr(a_wadr), .rptr(b_radr), .fifo_empty(b_fifo_empty), .fifo_full(a_fifo_full), .wclk(a_clk), .rclk(b_clk), .rst(a_rst) );
4810 
 
4811 40 unneback 
`BASE`MODULE
4812 6 unneback 
    # (.addr_width(addr_width))
4813 
    cmp2 ( .wptr(b_wadr), .rptr(a_radr), .fifo_empty(a_fifo_empty), .fifo_full(b_fifo_full), .wclk(b_clk), .rclk(a_clk), .rst(b_rst) );
4814 40 unneback 
`undef MODULE
4815 6 unneback 
 
4816 
endmodule
4817 40 unneback 
`endif
4818 48 unneback 
 
4819 
`ifdef REG_FILE
4820 
`define MODULE reg_file
4821 
module `BASE`MODULE (
4822 
`undef MODULE
4823 
    a1, a2, a3, wd3, we3, rd1, rd2, clk
4824 
);
4825 
parameter data_width = 32;
4826 
parameter addr_width = 5;
4827 
input [addr_width-1:0] a1, a2, a3;
4828 
input [data_width-1:0] wd3;
4829 
input we3;
4830 
output [data_width-1:0] rd1, rd2;
4831 
input clk;
4832 
 
4833 
`ifdef ACTEL
4834 
reg [data_width-1:0] wd3_reg;
4835 
reg [addr_width-1:0] a1_reg, a2_reg, a3_reg;
4836 
reg we3_reg;
4837 98 unneback 
reg [data_width-1:0] ram1 [(1<<addr_width)-1:0] `SYN_NO_RW_CHECK;
4838 
reg [data_width-1:0] ram2 [(1<<addr_width)-1:0] `SYN_NO_RW_CHECK;
4839 48 unneback 
always @ (posedge clk or posedge rst)
4840 
if (rst)
4841 
    {wd3_reg, a3_reg, we3_reg} <= {(data_width+addr_width+1){1'b0}};
4842 
else
4843 
    {wd3_reg, a3_reg, we3_reg} <= {wd3,a3,wd3};
4844 
 
4845 
    always @ (negedge clk)
4846 
    if (we3_reg)
4847 
        ram1[a3_reg] <= wd3;
4848 
    always @ (posedge clk)
4849 
        a1_reg <= a1;
4850 
    assign rd1 = ram1[a1_reg];
4851 
 
4852 
    always @ (negedge clk)
4853 
    if (we3_reg)
4854 
        ram2[a3_reg] <= wd3;
4855 
    always @ (posedge clk)
4856 
        a2_reg <= a2;
4857 
    assign rd2 = ram2[a2_reg];
4858 
 
4859 
`else
4860 
 
4861 
`define MODULE dpram_1r1w
4862 
`BASE`MODULE
4863 
    # ( .data_width(data_width), .addr_width(addr_width))
4864 
    ram1 (
4865 
        .d_a(wd3),
4866 
        .adr_a(a3),
4867 
        .we_a(we3),
4868 
        .clk_a(clk),
4869 
        .q_b(rd1),
4870 
        .adr_b(a1),
4871 
        .clk_b(clk) );
4872 
 
4873 
`BASE`MODULE
4874 
    # ( .data_width(data_width), .addr_width(addr_width))
4875 
    ram2 (
4876 
        .d_a(wd3),
4877 
        .adr_a(a3),
4878 
        .we_a(we3),
4879 
        .clk_a(clk),
4880 
        .q_b(rd2),
4881 
        .adr_b(a2),
4882 
        .clk_b(clk) );
4883 
`undef MODULE
4884 
 
4885 
`endif
4886 
 
4887 
endmodule
4888 
`endif
4889 12 unneback 
//////////////////////////////////////////////////////////////////////
4890 
////                                                              ////
4891 
////  Versatile library, wishbone stuff                           ////
4892 
////                                                              ////
4893 
////  Description                                                 ////
4894 
////  Wishbone compliant modules                                  ////
4895 
////                                                              ////
4896 
////                                                              ////
4897 
////  To Do:                                                      ////
4898 
////   -                                                          ////
4899 
////                                                              ////
4900 
////  Author(s):                                                  ////
4901 
////      - Michael Unneback, unneback@opencores.org              ////
4902 
////        ORSoC AB                                              ////
4903 
////                                                              ////
4904 
//////////////////////////////////////////////////////////////////////
4905 
////                                                              ////
4906 
//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////
4907 
////                                                              ////
4908 
//// This source file may be used and distributed without         ////
4909 
//// restriction provided that this copyright statement is not    ////
4910 
//// removed from the file and that any derivative work contains  ////
4911 
//// the original copyright notice and the associated disclaimer. ////
4912 
////                                                              ////
4913 
//// This source file is free software; you can redistribute it   ////
4914 
//// and/or modify it under the terms of the GNU Lesser General   ////
4915 
//// Public License as published by the Free Software Foundation; ////
4916 
//// either version 2.1 of the License, or (at your option) any   ////
4917 
//// later version.                                               ////
4918 
////                                                              ////
4919 
//// This source is distributed in the hope that it will be       ////
4920 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
4921 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
4922 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
4923 
//// details.                                                     ////
4924 
////                                                              ////
4925 
//// You should have received a copy of the GNU Lesser General    ////
4926 
//// Public License along with this source; if not, download it   ////
4927 
//// from http://www.opencores.org/lgpl.shtml                     ////
4928 
////                                                              ////
4929 
//////////////////////////////////////////////////////////////////////
4930 
 
4931 75 unneback 
`ifdef WB_ADR_INC
4932 
`timescale 1ns/1ns
4933 
`define MODULE wb_adr_inc
4934 85 unneback 
module `BASE`MODULE ( cyc_i, stb_i, cti_i, bte_i, adr_i, we_i, ack_o, adr_o, clk, rst);
4935 75 unneback 
`undef MODULE
4936 83 unneback 
parameter adr_width = 10;
4937 
parameter max_burst_width = 4;
4938 85 unneback 
input cyc_i, stb_i, we_i;
4939 83 unneback 
input [2:0] cti_i;
4940 
input [1:0] bte_i;
4941 
input [adr_width-1:0] adr_i;
4942 
output [adr_width-1:0] adr_o;
4943 
output ack_o;
4944 
input clk, rst;
4945 75 unneback 
 
4946 83 unneback 
reg [adr_width-1:0] adr;
4947 90 unneback 
wire [max_burst_width-1:0] to_adr;
4948 91 unneback 
reg [max_burst_width-1:0] last_adr;
4949 92 unneback 
reg last_cycle;
4950 
localparam idle_or_eoc = 1'b0;
4951 
localparam cyc_or_ws   = 1'b1;
4952 90 unneback 
 
4953 91 unneback 
always @ (posedge clk or posedge rst)
4954 
if (rst)
4955 
    last_adr <= {max_burst_width{1'b0}};
4956 
else
4957 
    if (stb_i)
4958 92 unneback 
        last_adr <=adr_o[max_burst_width-1:0];
4959 91 unneback 
 
4960 83 unneback 
generate
4961 
if (max_burst_width==0) begin : inst_0
4962 97 unneback 
 
4963 
        reg ack_o;
4964 
        assign adr_o = adr_i;
4965 
        always @ (posedge clk or posedge rst)
4966 
        if (rst)
4967 
            ack_o <= 1'b0;
4968 
        else
4969 
            ack_o <= cyc_i & stb_i & !ack_o;
4970 
 
4971 83 unneback 
end else begin
4972 
 
4973 
    always @ (posedge clk or posedge rst)
4974 
    if (rst)
4975 92 unneback 
        last_cycle <= idle_or_eoc;
4976 83 unneback 
    else
4977 92 unneback 
        last_cycle <= (!cyc_i) ? idle_or_eoc : //idle
4978 
                      (cyc_i & ack_o & (cti_i==3'b000 | cti_i==3'b111)) ? idle_or_eoc : // eoc
4979 
                      (cyc_i & !stb_i) ? cyc_or_ws : //ws
4980 
                      cyc_or_ws; // cyc
4981 
    assign to_adr = (last_cycle==idle_or_eoc) ? adr_i[max_burst_width-1:0] : adr[max_burst_width-1:0];
4982 85 unneback 
    assign adr_o[max_burst_width-1:0] = (we_i) ? adr_i[max_burst_width-1:0] :
4983 91 unneback 
                                        (!stb_i) ? last_adr :
4984 92 unneback 
                                        (last_cycle==idle_or_eoc) ? adr_i[max_burst_width-1:0] :
4985 85 unneback 
                                        adr[max_burst_width-1:0];
4986 92 unneback 
    assign ack_o = (last_cycle==cyc_or_ws) & stb_i;
4987 97 unneback 
 
4988 83 unneback 
end
4989 
endgenerate
4990 
 
4991 
generate
4992 
if (max_burst_width==2) begin : inst_2
4993 
    always @ (posedge clk or posedge rst)
4994 
    if (rst)
4995 
        adr <= 2'h0;
4996 
    else
4997 
        if (cyc_i & stb_i)
4998 
            adr[1:0] <= to_adr[1:0] + 2'd1;
4999 75 unneback 
        else
5000 83 unneback 
            adr <= to_adr[1:0];
5001 
end
5002 
endgenerate
5003 
 
5004 
generate
5005 
if (max_burst_width==3) begin : inst_3
5006 
    always @ (posedge clk or posedge rst)
5007 
    if (rst)
5008 
        adr <= 3'h0;
5009 
    else
5010 
        if (cyc_i & stb_i)
5011 
            case (bte_i)
5012 
            2'b01: adr[2:0] <= {to_adr[2],to_adr[1:0] + 2'd1};
5013 
            default: adr[3:0] <= to_adr[2:0] + 3'd1;
5014 75 unneback 
            endcase
5015 83 unneback 
        else
5016 
            adr <= to_adr[2:0];
5017 
end
5018 
endgenerate
5019 
 
5020 
generate
5021 
if (max_burst_width==4) begin : inst_4
5022 
    always @ (posedge clk or posedge rst)
5023 
    if (rst)
5024 
        adr <= 4'h0;
5025 
    else
5026 91 unneback 
        if (stb_i) // | (!stb_i & last_cycle!=ws)) // for !stb_i restart with adr_i +1, only inc once
5027 83 unneback 
            case (bte_i)
5028 
            2'b01: adr[3:0] <= {to_adr[3:2],to_adr[1:0] + 2'd1};
5029 
            2'b10: adr[3:0] <= {to_adr[3],to_adr[2:0] + 3'd1};
5030 
            default: adr[3:0] <= to_adr + 4'd1;
5031 
            endcase
5032 
        else
5033 
            adr <= to_adr[3:0];
5034 
end
5035 
endgenerate
5036 
 
5037 
generate
5038 
if (adr_width > max_burst_width) begin : pass_through
5039 
    assign adr_o[adr_width-1:max_burst_width] = adr_i[adr_width-1:max_burst_width];
5040 
end
5041 
endgenerate
5042 
 
5043 
endmodule
5044 75 unneback 
`endif
5045 
 
5046 40 unneback 
`ifdef WB3WB3_BRIDGE
5047 12 unneback 
// async wb3 - wb3 bridge
5048 
`timescale 1ns/1ns
5049 40 unneback 
`define MODULE wb3wb3_bridge
5050 
module `BASE`MODULE (
5051 
`undef MODULE
5052 12 unneback 
        // wishbone slave side
5053 
        wbs_dat_i, wbs_adr_i, wbs_sel_i, wbs_bte_i, wbs_cti_i, wbs_we_i, wbs_cyc_i, wbs_stb_i, wbs_dat_o, wbs_ack_o, wbs_clk, wbs_rst,
5054 
        // wishbone master side
5055 
        wbm_dat_o, wbm_adr_o, wbm_sel_o, wbm_bte_o, wbm_cti_o, wbm_we_o, wbm_cyc_o, wbm_stb_o, wbm_dat_i, wbm_ack_i, wbm_clk, wbm_rst);
5056 
 
5057 95 unneback 
parameter style = "FIFO"; // valid: simple, FIFO
5058 
parameter addr_width = 4;
5059 
 
5060 12 unneback 
input [31:0] wbs_dat_i;
5061 
input [31:2] wbs_adr_i;
5062 
input [3:0]  wbs_sel_i;
5063 
input [1:0]  wbs_bte_i;
5064 
input [2:0]  wbs_cti_i;
5065 
input wbs_we_i, wbs_cyc_i, wbs_stb_i;
5066 
output [31:0] wbs_dat_o;
5067 14 unneback 
output wbs_ack_o;
5068 12 unneback 
input wbs_clk, wbs_rst;
5069 
 
5070 
output [31:0] wbm_dat_o;
5071 
output reg [31:2] wbm_adr_o;
5072 
output [3:0]  wbm_sel_o;
5073 
output reg [1:0]  wbm_bte_o;
5074 
output reg [2:0]  wbm_cti_o;
5075 14 unneback 
output reg wbm_we_o;
5076 
output wbm_cyc_o;
5077 12 unneback 
output wbm_stb_o;
5078 
input [31:0]  wbm_dat_i;
5079 
input wbm_ack_i;
5080 
input wbm_clk, wbm_rst;
5081 
 
5082 
// bte
5083 
parameter linear       = 2'b00;
5084 
parameter wrap4        = 2'b01;
5085 
parameter wrap8        = 2'b10;
5086 
parameter wrap16       = 2'b11;
5087 
// cti
5088 
parameter classic      = 3'b000;
5089 
parameter incburst     = 3'b010;
5090 
parameter endofburst   = 3'b111;
5091 
 
5092 95 unneback 
localparam wbs_adr  = 1'b0;
5093 
localparam wbs_data = 1'b1;
5094 12 unneback 
 
5095 95 unneback 
localparam wbm_adr0      = 2'b00;
5096 
localparam wbm_adr1      = 2'b01;
5097 
localparam wbm_data      = 2'b10;
5098 
localparam wbm_data_wait = 2'b11;
5099 12 unneback 
 
5100 
reg [1:0] wbs_bte_reg;
5101 
reg wbs;
5102 
wire wbs_eoc_alert, wbm_eoc_alert;
5103 
reg wbs_eoc, wbm_eoc;
5104 
reg [1:0] wbm;
5105 
 
5106 14 unneback 
wire [1:16] wbs_count, wbm_count;
5107 12 unneback 
 
5108 
wire [35:0] a_d, a_q, b_d, b_q;
5109 
wire a_wr, a_rd, a_fifo_full, a_fifo_empty, b_wr, b_rd, b_fifo_full, b_fifo_empty;
5110 
reg a_rd_reg;
5111 
wire b_rd_adr, b_rd_data;
5112 14 unneback 
wire b_rd_data_reg;
5113 
wire [35:0] temp;
5114 12 unneback 
 
5115 
`define WE 5
5116 
`define BTE 4:3
5117 
`define CTI 2:0
5118 
 
5119 
assign wbs_eoc_alert = (wbs_bte_reg==wrap4 & wbs_count[3]) | (wbs_bte_reg==wrap8 & wbs_count[7]) | (wbs_bte_reg==wrap16 & wbs_count[15]);
5120 
always @ (posedge wbs_clk or posedge wbs_rst)
5121 
if (wbs_rst)
5122 
        wbs_eoc <= 1'b0;
5123 
else
5124 
        if (wbs==wbs_adr & wbs_stb_i & !a_fifo_full)
5125 78 unneback 
                wbs_eoc <= (wbs_bte_i==linear) | (wbs_cti_i==3'b111);
5126 12 unneback 
        else if (wbs_eoc_alert & (a_rd | a_wr))
5127 
                wbs_eoc <= 1'b1;
5128 
 
5129 40 unneback 
`define MODULE cnt_shreg_ce_clear
5130 
`BASE`MODULE # ( .length(16))
5131 
`undef MODULE
5132 12 unneback 
    cnt0 (
5133 
        .cke(wbs_ack_o),
5134 
        .clear(wbs_eoc),
5135 
        .q(wbs_count),
5136 
        .rst(wbs_rst),
5137 
        .clk(wbs_clk));
5138 
 
5139 
always @ (posedge wbs_clk or posedge wbs_rst)
5140 
if (wbs_rst)
5141 
        wbs <= wbs_adr;
5142 
else
5143 75 unneback 
        if ((wbs==wbs_adr) & wbs_cyc_i & wbs_stb_i & a_fifo_empty)
5144 12 unneback 
                wbs <= wbs_data;
5145 
        else if (wbs_eoc & wbs_ack_o)
5146 
                wbs <= wbs_adr;
5147 
 
5148 
// wbs FIFO
5149 75 unneback 
assign a_d = (wbs==wbs_adr) ? {wbs_adr_i[31:2],wbs_we_i,((wbs_cti_i==3'b111) ? {2'b00,3'b000} : {wbs_bte_i,wbs_cti_i})} : {wbs_dat_i,wbs_sel_i};
5150 
assign a_wr = (wbs==wbs_adr)  ? wbs_cyc_i & wbs_stb_i & a_fifo_empty :
5151 12 unneback 
              (wbs==wbs_data) ? wbs_we_i  & wbs_stb_i & !a_fifo_full :
5152 
              1'b0;
5153 
assign a_rd = !a_fifo_empty;
5154 
always @ (posedge wbs_clk or posedge wbs_rst)
5155 
if (wbs_rst)
5156 
        a_rd_reg <= 1'b0;
5157 
else
5158 
        a_rd_reg <= a_rd;
5159 
assign wbs_ack_o = a_rd_reg | (a_wr & wbs==wbs_data);
5160 
 
5161 
assign wbs_dat_o = a_q[35:4];
5162 
 
5163 
always @ (posedge wbs_clk or posedge wbs_rst)
5164 
if (wbs_rst)
5165 13 unneback 
        wbs_bte_reg <= 2'b00;
5166 12 unneback 
else
5167 13 unneback 
        wbs_bte_reg <= wbs_bte_i;
5168 12 unneback 
 
5169 
// wbm FIFO
5170 
assign wbm_eoc_alert = (wbm_bte_o==wrap4 & wbm_count[3]) | (wbm_bte_o==wrap8 & wbm_count[7]) | (wbm_bte_o==wrap16 & wbm_count[15]);
5171 
always @ (posedge wbm_clk or posedge wbm_rst)
5172 
if (wbm_rst)
5173 
        wbm_eoc <= 1'b0;
5174 
else
5175 
        if (wbm==wbm_adr0 & !b_fifo_empty)
5176 
                wbm_eoc <= b_q[`BTE] == linear;
5177 
        else if (wbm_eoc_alert & wbm_ack_i)
5178 
                wbm_eoc <= 1'b1;
5179 
 
5180 
always @ (posedge wbm_clk or posedge wbm_rst)
5181 
if (wbm_rst)
5182 
        wbm <= wbm_adr0;
5183 
else
5184 33 unneback 
/*
5185 12 unneback 
    if ((wbm==wbm_adr0 & !b_fifo_empty) |
5186 
        (wbm==wbm_adr1 & !b_fifo_empty & wbm_we_o) |
5187 
        (wbm==wbm_adr1 & !wbm_we_o) |
5188 
        (wbm==wbm_data & wbm_ack_i & wbm_eoc))
5189 
        wbm <= {wbm[0],!(wbm[1] ^ wbm[0])};  // count sequence 00,01,10
5190 33 unneback 
*/
5191 
    case (wbm)
5192 
    wbm_adr0:
5193 
        if (!b_fifo_empty)
5194 
            wbm <= wbm_adr1;
5195 
    wbm_adr1:
5196 
        if (!wbm_we_o | (!b_fifo_empty & wbm_we_o))
5197 
            wbm <= wbm_data;
5198 
    wbm_data:
5199 
        if (wbm_ack_i & wbm_eoc)
5200 
            wbm <= wbm_adr0;
5201 
        else if (b_fifo_empty & wbm_we_o & wbm_ack_i)
5202 
            wbm <= wbm_data_wait;
5203 
    wbm_data_wait:
5204 
        if (!b_fifo_empty)
5205 
            wbm <= wbm_data;
5206 
    endcase
5207 12 unneback 
 
5208 
assign b_d = {wbm_dat_i,4'b1111};
5209 
assign b_wr = !wbm_we_o & wbm_ack_i;
5210 
assign b_rd_adr  = (wbm==wbm_adr0 & !b_fifo_empty);
5211 
assign b_rd_data = (wbm==wbm_adr1 & !b_fifo_empty & wbm_we_o) ? 1'b1 : // b_q[`WE]
5212 
                   (wbm==wbm_data & !b_fifo_empty & wbm_we_o & wbm_ack_i & !wbm_eoc) ? 1'b1 :
5213 33 unneback 
                   (wbm==wbm_data_wait & !b_fifo_empty) ? 1'b1 :
5214 12 unneback 
                   1'b0;
5215 
assign b_rd = b_rd_adr | b_rd_data;
5216 
 
5217 40 unneback 
`define MODULE dff
5218 
`BASE`MODULE dff1 ( .d(b_rd_data), .q(b_rd_data_reg), .clk(wbm_clk), .rst(wbm_rst));
5219 
`undef MODULE
5220 
`define MODULE dff_ce
5221 
`BASE`MODULE # ( .width(36)) dff2 ( .d(b_q), .ce(b_rd_data_reg), .q(temp), .clk(wbm_clk), .rst(wbm_rst));
5222 
`undef MODULE
5223 12 unneback 
 
5224 
assign {wbm_dat_o,wbm_sel_o} = (b_rd_data_reg) ? b_q : temp;
5225 
 
5226 40 unneback 
`define MODULE cnt_shreg_ce_clear
5227 42 unneback 
`BASE`MODULE # ( .length(16))
5228 40 unneback 
`undef MODULE
5229 12 unneback 
    cnt1 (
5230 
        .cke(wbm_ack_i),
5231 
        .clear(wbm_eoc),
5232 
        .q(wbm_count),
5233 
        .rst(wbm_rst),
5234 
        .clk(wbm_clk));
5235 
 
5236 33 unneback 
assign wbm_cyc_o = (wbm==wbm_data | wbm==wbm_data_wait);
5237 
assign wbm_stb_o = (wbm==wbm_data);
5238 12 unneback 
 
5239 
always @ (posedge wbm_clk or posedge wbm_rst)
5240 
if (wbm_rst)
5241 
        {wbm_adr_o,wbm_we_o,wbm_bte_o,wbm_cti_o} <= {30'h0,1'b0,linear,classic};
5242 
else begin
5243 
        if (wbm==wbm_adr0 & !b_fifo_empty)
5244 
                {wbm_adr_o,wbm_we_o,wbm_bte_o,wbm_cti_o} <= b_q;
5245 
        else if (wbm_eoc_alert & wbm_ack_i)
5246 
                wbm_cti_o <= endofburst;
5247 
end
5248 
 
5249 
//async_fifo_dw_simplex_top
5250 40 unneback 
`define MODULE fifo_2r2w_async_simplex
5251 
`BASE`MODULE
5252 
`undef MODULE
5253 12 unneback 
# ( .data_width(36), .addr_width(addr_width))
5254 
fifo (
5255 
    // a side
5256 
    .a_d(a_d),
5257 
    .a_wr(a_wr),
5258 
    .a_fifo_full(a_fifo_full),
5259 
    .a_q(a_q),
5260 
    .a_rd(a_rd),
5261 
    .a_fifo_empty(a_fifo_empty),
5262 
    .a_clk(wbs_clk),
5263 
    .a_rst(wbs_rst),
5264 
    // b side
5265 
    .b_d(b_d),
5266 
    .b_wr(b_wr),
5267 
    .b_fifo_full(b_fifo_full),
5268 
    .b_q(b_q),
5269 
    .b_rd(b_rd),
5270 
    .b_fifo_empty(b_fifo_empty),
5271 
    .b_clk(wbm_clk),
5272 
    .b_rst(wbm_rst)
5273 
    );
5274 
 
5275 
endmodule
5276 40 unneback 
`undef WE
5277 
`undef BTE
5278 
`undef CTI
5279 
`endif
5280 17 unneback 
 
5281 75 unneback 
`ifdef WB3AVALON_BRIDGE
5282 
`define MODULE wb3avalon_bridge
5283 
module `BASE`MODULE (
5284 
`undef MODULE
5285 
        // wishbone slave side
5286 
        wbs_dat_i, wbs_adr_i, wbs_sel_i, wbs_bte_i, wbs_cti_i, wbs_we_i, wbs_cyc_i, wbs_stb_i, wbs_dat_o, wbs_ack_o, wbs_clk, wbs_rst,
5287 77 unneback 
        // avalon master side
5288 75 unneback 
        readdata, readdatavalid, address, read, be, write, burstcount, writedata, waitrequest, beginbursttransfer, clk, rst);
5289 
 
5290 85 unneback 
parameter linewrapburst = 1'b0;
5291 
 
5292 75 unneback 
input [31:0] wbs_dat_i;
5293 
input [31:2] wbs_adr_i;
5294 
input [3:0]  wbs_sel_i;
5295 
input [1:0]  wbs_bte_i;
5296 
input [2:0]  wbs_cti_i;
5297 83 unneback 
input wbs_we_i;
5298 
input wbs_cyc_i;
5299 
input wbs_stb_i;
5300 75 unneback 
output [31:0] wbs_dat_o;
5301 
output wbs_ack_o;
5302 
input wbs_clk, wbs_rst;
5303 
 
5304 
input [31:0] readdata;
5305 
output [31:0] writedata;
5306 
output [31:2] address;
5307 
output [3:0]  be;
5308 
output write;
5309 81 unneback 
output read;
5310 75 unneback 
output beginbursttransfer;
5311 
output [3:0] burstcount;
5312 
input readdatavalid;
5313 
input waitrequest;
5314 
input clk;
5315 
input rst;
5316 
 
5317 
wire [1:0] wbm_bte_o;
5318 
wire [2:0] wbm_cti_o;
5319 
wire wbm_we_o, wbm_cyc_o, wbm_stb_o, wbm_ack_i;
5320 
reg last_cyc;
5321 79 unneback 
reg [3:0] counter;
5322 82 unneback 
reg read_busy;
5323 75 unneback 
 
5324 
always @ (posedge clk or posedge rst)
5325 
if (rst)
5326 
    last_cyc <= 1'b0;
5327 
else
5328 
    last_cyc <= wbm_cyc_o;
5329 
 
5330 79 unneback 
always @ (posedge clk or posedge rst)
5331 
if (rst)
5332 82 unneback 
    read_busy <= 1'b0;
5333 79 unneback 
else
5334 82 unneback 
    if (read & !waitrequest)
5335 
        read_busy <= 1'b1;
5336 
    else if (wbm_ack_i & wbm_cti_o!=3'b010)
5337 
        read_busy <= 1'b0;
5338 
assign read = wbm_cyc_o & wbm_stb_o & !wbm_we_o & !read_busy;
5339 81 unneback 
 
5340 75 unneback 
assign beginbursttransfer = (!last_cyc & wbm_cyc_o) & wbm_cti_o==3'b010;
5341 
assign burstcount = (wbm_bte_o==2'b01) ? 4'd4 :
5342 
                    (wbm_bte_o==2'b10) ? 4'd8 :
5343 78 unneback 
                    (wbm_bte_o==2'b11) ? 4'd16:
5344 
                    4'd1;
5345 82 unneback 
assign wbm_ack_i = (readdatavalid) | (write & !waitrequest);
5346 75 unneback 
 
5347 79 unneback 
always @ (posedge clk or posedge rst)
5348 
if (rst) begin
5349 
    counter <= 4'd0;
5350 
end else
5351 80 unneback 
    if (wbm_we_o) begin
5352 
        if (!waitrequest & !last_cyc & wbm_cyc_o) begin
5353 85 unneback 
            counter <= burstcount -4'd1;
5354 80 unneback 
        end else if (waitrequest & !last_cyc & wbm_cyc_o) begin
5355 
            counter <= burstcount;
5356 
        end else if (!waitrequest & wbm_stb_o) begin
5357 
            counter <= counter - 4'd1;
5358 
        end
5359 82 unneback 
    end
5360 81 unneback 
assign write = wbm_cyc_o & wbm_stb_o & wbm_we_o & counter!=4'd0;
5361 79 unneback 
 
5362 75 unneback 
`define MODULE wb3wb3_bridge
5363 77 unneback 
`BASE`MODULE wbwb3inst (
5364 75 unneback 
`undef MODULE
5365 
    // wishbone slave side
5366 
    .wbs_dat_i(wbs_dat_i),
5367 
    .wbs_adr_i(wbs_adr_i),
5368 
    .wbs_sel_i(wbs_sel_i),
5369 
    .wbs_bte_i(wbs_bte_i),
5370 
    .wbs_cti_i(wbs_cti_i),
5371 
    .wbs_we_i(wbs_we_i),
5372 
    .wbs_cyc_i(wbs_cyc_i),
5373 
    .wbs_stb_i(wbs_stb_i),
5374 
    .wbs_dat_o(wbs_dat_o),
5375 
    .wbs_ack_o(wbs_ack_o),
5376 
    .wbs_clk(wbs_clk),
5377 
    .wbs_rst(wbs_rst),
5378 
    // wishbone master side
5379 
    .wbm_dat_o(writedata),
5380 78 unneback 
    .wbm_adr_o(address),
5381 75 unneback 
    .wbm_sel_o(be),
5382 
    .wbm_bte_o(wbm_bte_o),
5383 
    .wbm_cti_o(wbm_cti_o),
5384 
    .wbm_we_o(wbm_we_o),
5385 
    .wbm_cyc_o(wbm_cyc_o),
5386 
    .wbm_stb_o(wbm_stb_o),
5387 
    .wbm_dat_i(readdata),
5388 
    .wbm_ack_i(wbm_ack_i),
5389 
    .wbm_clk(clk),
5390 
    .wbm_rst(rst));
5391 
 
5392 
 
5393 
endmodule
5394 
`endif
5395 
 
5396 40 unneback 
`ifdef WB3_ARBITER_TYPE1
5397 
`define MODULE wb3_arbiter_type1
5398 42 unneback 
module `BASE`MODULE (
5399 40 unneback 
`undef MODULE
5400 39 unneback 
    wbm_dat_o, wbm_adr_o, wbm_sel_o, wbm_cti_o, wbm_bte_o, wbm_we_o, wbm_stb_o, wbm_cyc_o,
5401 
    wbm_dat_i, wbm_ack_i, wbm_err_i, wbm_rty_i,
5402 
    wbs_dat_i, wbs_adr_i, wbs_sel_i, wbs_cti_i, wbs_bte_i, wbs_we_i, wbs_stb_i, wbs_cyc_i,
5403 
    wbs_dat_o, wbs_ack_o, wbs_err_o, wbs_rty_o,
5404 
    wb_clk, wb_rst
5405 
);
5406 
 
5407 
parameter nr_of_ports = 3;
5408 
parameter adr_size = 26;
5409 
parameter adr_lo   = 2;
5410 
parameter dat_size = 32;
5411 
parameter sel_size = dat_size/8;
5412 
 
5413 
localparam aw = (adr_size - adr_lo) * nr_of_ports;
5414 
localparam dw = dat_size * nr_of_ports;
5415 
localparam sw = sel_size * nr_of_ports;
5416 
localparam cw = 3 * nr_of_ports;
5417 
localparam bw = 2 * nr_of_ports;
5418 
 
5419 
input  [dw-1:0] wbm_dat_o;
5420 
input  [aw-1:0] wbm_adr_o;
5421 
input  [sw-1:0] wbm_sel_o;
5422 
input  [cw-1:0] wbm_cti_o;
5423 
input  [bw-1:0] wbm_bte_o;
5424 
input  [nr_of_ports-1:0] wbm_we_o, wbm_stb_o, wbm_cyc_o;
5425 
output [dw-1:0] wbm_dat_i;
5426 
output [nr_of_ports-1:0] wbm_ack_i, wbm_err_i, wbm_rty_i;
5427 
 
5428 
output [dat_size-1:0] wbs_dat_i;
5429 
output [adr_size-1:adr_lo] wbs_adr_i;
5430 
output [sel_size-1:0] wbs_sel_i;
5431 
output [2:0] wbs_cti_i;
5432 
output [1:0] wbs_bte_i;
5433 
output wbs_we_i, wbs_stb_i, wbs_cyc_i;
5434 
input  [dat_size-1:0] wbs_dat_o;
5435 
input  wbs_ack_o, wbs_err_o, wbs_rty_o;
5436 
 
5437 
input wb_clk, wb_rst;
5438 
 
5439 44 unneback 
reg  [nr_of_ports-1:0] select;
5440 39 unneback 
wire [nr_of_ports-1:0] state;
5441 
wire [nr_of_ports-1:0] eoc; // end-of-cycle
5442 
wire [nr_of_ports-1:0] sel;
5443 
wire idle;
5444 
 
5445 
genvar i;
5446 
 
5447 
assign idle = !(|state);
5448 
 
5449 
generate
5450 
if (nr_of_ports == 2) begin
5451 
 
5452 
    wire [2:0] wbm1_cti_o, wbm0_cti_o;
5453 
 
5454 
    assign {wbm1_cti_o,wbm0_cti_o} = wbm_cti_o;
5455 
 
5456 44 unneback 
    //assign select = (idle) ? {wbm_cyc_o[1],!wbm_cyc_o[1] & wbm_cyc_o[0]} : {nr_of_ports{1'b0}};
5457 
 
5458 
    always @ (idle or wbm_cyc_o)
5459 
    if (idle)
5460 
        casex (wbm_cyc_o)
5461 
        2'b1x : select = 2'b10;
5462 
        2'b01 : select = 2'b01;
5463 
        default : select = {nr_of_ports{1'b0}};
5464 
        endcase
5465 
    else
5466 
        select = {nr_of_ports{1'b0}};
5467 
 
5468 39 unneback 
    assign eoc[1] = (wbm_ack_i[1] & (wbm1_cti_o == 3'b000 | wbm1_cti_o == 3'b111)) | !wbm_cyc_o[1];
5469 
    assign eoc[0] = (wbm_ack_i[0] & (wbm0_cti_o == 3'b000 | wbm0_cti_o == 3'b111)) | !wbm_cyc_o[0];
5470 
 
5471 
end
5472 
endgenerate
5473 
 
5474 
generate
5475 
if (nr_of_ports == 3) begin
5476 
 
5477 
    wire [2:0] wbm2_cti_o, wbm1_cti_o, wbm0_cti_o;
5478 
 
5479 
    assign {wbm2_cti_o,wbm1_cti_o,wbm0_cti_o} = wbm_cti_o;
5480 
 
5481 44 unneback 
    always @ (idle or wbm_cyc_o)
5482 
    if (idle)
5483 
        casex (wbm_cyc_o)
5484 
        3'b1xx : select = 3'b100;
5485 
        3'b01x : select = 3'b010;
5486 
        3'b001 : select = 3'b001;
5487 
        default : select = {nr_of_ports{1'b0}};
5488 
        endcase
5489 
    else
5490 
        select = {nr_of_ports{1'b0}};
5491 
 
5492 
//    assign select = (idle) ? {wbm_cyc_o[2],!wbm_cyc_o[2] & wbm_cyc_o[1],wbm_cyc_o[2:1]==2'b00 & wbm_cyc_o[0]} : {nr_of_ports{1'b0}};
5493 39 unneback 
    assign eoc[2] = (wbm_ack_i[2] & (wbm2_cti_o == 3'b000 | wbm2_cti_o == 3'b111)) | !wbm_cyc_o[2];
5494 
    assign eoc[1] = (wbm_ack_i[1] & (wbm1_cti_o == 3'b000 | wbm1_cti_o == 3'b111)) | !wbm_cyc_o[1];
5495 
    assign eoc[0] = (wbm_ack_i[0] & (wbm0_cti_o == 3'b000 | wbm0_cti_o == 3'b111)) | !wbm_cyc_o[0];
5496 
 
5497 
end
5498 
endgenerate
5499 
 
5500 
generate
5501 44 unneback 
if (nr_of_ports == 4) begin
5502 
 
5503 
    wire [2:0] wbm3_cti_o, wbm2_cti_o, wbm1_cti_o, wbm0_cti_o;
5504 
 
5505 
    assign {wbm3_cti_o, wbm2_cti_o,wbm1_cti_o,wbm0_cti_o} = wbm_cti_o;
5506 
 
5507 
    //assign select = (idle) ? {wbm_cyc_o[3],!wbm_cyc_o[3] & wbm_cyc_o[2],wbm_cyc_o[3:2]==2'b00 & wbm_cyc_o[1],wbm_cyc_o[3:1]==3'b000 & wbm_cyc_o[0]} : {nr_of_ports{1'b0}};
5508 
 
5509 
    always @ (idle or wbm_cyc_o)
5510 
    if (idle)
5511 
        casex (wbm_cyc_o)
5512 
        4'b1xxx : select = 4'b1000;
5513 
        4'b01xx : select = 4'b0100;
5514 
        4'b001x : select = 4'b0010;
5515 
        4'b0001 : select = 4'b0001;
5516 
        default : select = {nr_of_ports{1'b0}};
5517 
        endcase
5518 
    else
5519 
        select = {nr_of_ports{1'b0}};
5520 
 
5521 
    assign eoc[3] = (wbm_ack_i[3] & (wbm3_cti_o == 3'b000 | wbm3_cti_o == 3'b111)) | !wbm_cyc_o[3];
5522 
    assign eoc[2] = (wbm_ack_i[2] & (wbm2_cti_o == 3'b000 | wbm2_cti_o == 3'b111)) | !wbm_cyc_o[2];
5523 
    assign eoc[1] = (wbm_ack_i[1] & (wbm1_cti_o == 3'b000 | wbm1_cti_o == 3'b111)) | !wbm_cyc_o[1];
5524 
    assign eoc[0] = (wbm_ack_i[0] & (wbm0_cti_o == 3'b000 | wbm0_cti_o == 3'b111)) | !wbm_cyc_o[0];
5525 
 
5526 
end
5527 
endgenerate
5528 
 
5529 
generate
5530 
if (nr_of_ports == 5) begin
5531 
 
5532 
    wire [2:0] wbm4_cti_o, wbm3_cti_o, wbm2_cti_o, wbm1_cti_o, wbm0_cti_o;
5533 
 
5534 
    assign {wbm4_cti_o, wbm3_cti_o, wbm2_cti_o,wbm1_cti_o,wbm0_cti_o} = wbm_cti_o;
5535 
 
5536 
    //assign select = (idle) ? {wbm_cyc_o[3],!wbm_cyc_o[3] & wbm_cyc_o[2],wbm_cyc_o[3:2]==2'b00 & wbm_cyc_o[1],wbm_cyc_o[3:1]==3'b000 & wbm_cyc_o[0]} : {nr_of_ports{1'b0}};
5537 
 
5538 
    always @ (idle or wbm_cyc_o)
5539 
    if (idle)
5540 
        casex (wbm_cyc_o)
5541 
        5'b1xxxx : select = 5'b10000;
5542 
        5'b01xxx : select = 5'b01000;
5543 
        5'b001xx : select = 5'b00100;
5544 
        5'b0001x : select = 5'b00010;
5545 
        5'b00001 : select = 5'b00001;
5546 
        default : select = {nr_of_ports{1'b0}};
5547 
        endcase
5548 
    else
5549 
        select = {nr_of_ports{1'b0}};
5550 
 
5551 
    assign eoc[4] = (wbm_ack_i[4] & (wbm4_cti_o == 3'b000 | wbm4_cti_o == 3'b111)) | !wbm_cyc_o[4];
5552 
    assign eoc[3] = (wbm_ack_i[3] & (wbm3_cti_o == 3'b000 | wbm3_cti_o == 3'b111)) | !wbm_cyc_o[3];
5553 
    assign eoc[2] = (wbm_ack_i[2] & (wbm2_cti_o == 3'b000 | wbm2_cti_o == 3'b111)) | !wbm_cyc_o[2];
5554 
    assign eoc[1] = (wbm_ack_i[1] & (wbm1_cti_o == 3'b000 | wbm1_cti_o == 3'b111)) | !wbm_cyc_o[1];
5555 
    assign eoc[0] = (wbm_ack_i[0] & (wbm0_cti_o == 3'b000 | wbm0_cti_o == 3'b111)) | !wbm_cyc_o[0];
5556 
 
5557 
end
5558 
endgenerate
5559 
 
5560 
generate
5561 67 unneback 
if (nr_of_ports == 6) begin
5562 
 
5563 
    wire [2:0] wbm5_cti_o, wbm4_cti_o, wbm3_cti_o, wbm2_cti_o, wbm1_cti_o, wbm0_cti_o;
5564 
 
5565 
    assign {wbm5_cti_o, wbm4_cti_o, wbm3_cti_o, wbm2_cti_o,wbm1_cti_o,wbm0_cti_o} = wbm_cti_o;
5566 
 
5567 
    //assign select = (idle) ? {wbm_cyc_o[3],!wbm_cyc_o[3] & wbm_cyc_o[2],wbm_cyc_o[3:2]==2'b00 & wbm_cyc_o[1],wbm_cyc_o[3:1]==3'b000 & wbm_cyc_o[0]} : {nr_of_ports{1'b0}};
5568 
 
5569 
    always @ (idle or wbm_cyc_o)
5570 
    if (idle)
5571 
        casex (wbm_cyc_o)
5572 
        6'b1xxxxx : select = 6'b100000;
5573 
        6'b01xxxx : select = 6'b010000;
5574 
        6'b001xxx : select = 6'b001000;
5575 
        6'b0001xx : select = 6'b000100;
5576 
        6'b00001x : select = 6'b000010;
5577 
        6'b000001 : select = 6'b000001;
5578 
        default : select = {nr_of_ports{1'b0}};
5579 
        endcase
5580 
    else
5581 
        select = {nr_of_ports{1'b0}};
5582 
 
5583 
    assign eoc[5] = (wbm_ack_i[5] & (wbm5_cti_o == 3'b000 | wbm5_cti_o == 3'b111)) | !wbm_cyc_o[5];
5584 
    assign eoc[4] = (wbm_ack_i[4] & (wbm4_cti_o == 3'b000 | wbm4_cti_o == 3'b111)) | !wbm_cyc_o[4];
5585 
    assign eoc[3] = (wbm_ack_i[3] & (wbm3_cti_o == 3'b000 | wbm3_cti_o == 3'b111)) | !wbm_cyc_o[3];
5586 
    assign eoc[2] = (wbm_ack_i[2] & (wbm2_cti_o == 3'b000 | wbm2_cti_o == 3'b111)) | !wbm_cyc_o[2];
5587 
    assign eoc[1] = (wbm_ack_i[1] & (wbm1_cti_o == 3'b000 | wbm1_cti_o == 3'b111)) | !wbm_cyc_o[1];
5588 
    assign eoc[0] = (wbm_ack_i[0] & (wbm0_cti_o == 3'b000 | wbm0_cti_o == 3'b111)) | !wbm_cyc_o[0];
5589 
 
5590 
end
5591 
endgenerate
5592 
 
5593 
generate
5594 
if (nr_of_ports == 7) begin
5595 
 
5596 
    wire [2:0] wbm6_cti_o, wbm5_cti_o, wbm4_cti_o, wbm3_cti_o, wbm2_cti_o, wbm1_cti_o, wbm0_cti_o;
5597 
 
5598 
    assign {wbm6_cti_o, wbm5_cti_o, wbm4_cti_o, wbm3_cti_o, wbm2_cti_o,wbm1_cti_o,wbm0_cti_o} = wbm_cti_o;
5599 
 
5600 
    //assign select = (idle) ? {wbm_cyc_o[3],!wbm_cyc_o[3] & wbm_cyc_o[2],wbm_cyc_o[3:2]==2'b00 & wbm_cyc_o[1],wbm_cyc_o[3:1]==3'b000 & wbm_cyc_o[0]} : {nr_of_ports{1'b0}};
5601 
 
5602 
    always @ (idle or wbm_cyc_o)
5603 
    if (idle)
5604 
        casex (wbm_cyc_o)
5605 
        7'b1xxxxxx : select = 7'b1000000;
5606 
        7'b01xxxxx : select = 7'b0100000;
5607 
        7'b001xxxx : select = 7'b0010000;
5608 
        7'b0001xxx : select = 7'b0001000;
5609 
        7'b00001xx : select = 7'b0000100;
5610 
        7'b000001x : select = 7'b0000010;
5611 
        7'b0000001 : select = 7'b0000001;
5612 
        default : select = {nr_of_ports{1'b0}};
5613 
        endcase
5614 
    else
5615 
        select = {nr_of_ports{1'b0}};
5616 
 
5617 
    assign eoc[6] = (wbm_ack_i[6] & (wbm6_cti_o == 3'b000 | wbm6_cti_o == 3'b111)) | !wbm_cyc_o[6];
5618 
    assign eoc[5] = (wbm_ack_i[5] & (wbm5_cti_o == 3'b000 | wbm5_cti_o == 3'b111)) | !wbm_cyc_o[5];
5619 
    assign eoc[4] = (wbm_ack_i[4] & (wbm4_cti_o == 3'b000 | wbm4_cti_o == 3'b111)) | !wbm_cyc_o[4];
5620 
    assign eoc[3] = (wbm_ack_i[3] & (wbm3_cti_o == 3'b000 | wbm3_cti_o == 3'b111)) | !wbm_cyc_o[3];
5621 
    assign eoc[2] = (wbm_ack_i[2] & (wbm2_cti_o == 3'b000 | wbm2_cti_o == 3'b111)) | !wbm_cyc_o[2];
5622 
    assign eoc[1] = (wbm_ack_i[1] & (wbm1_cti_o == 3'b000 | wbm1_cti_o == 3'b111)) | !wbm_cyc_o[1];
5623 
    assign eoc[0] = (wbm_ack_i[0] & (wbm0_cti_o == 3'b000 | wbm0_cti_o == 3'b111)) | !wbm_cyc_o[0];
5624 
 
5625 
end
5626 
endgenerate
5627 
 
5628 
generate
5629 
if (nr_of_ports == 8) begin
5630 
 
5631 
    wire [2:0] wbm7_cti_o, wbm6_cti_o, wbm5_cti_o, wbm4_cti_o, wbm3_cti_o, wbm2_cti_o, wbm1_cti_o, wbm0_cti_o;
5632 
 
5633 
    assign {wbm7_cti_o, wbm6_cti_o, wbm5_cti_o, wbm4_cti_o, wbm3_cti_o, wbm2_cti_o,wbm1_cti_o,wbm0_cti_o} = wbm_cti_o;
5634 
 
5635 
    //assign select = (idle) ? {wbm_cyc_o[3],!wbm_cyc_o[3] & wbm_cyc_o[2],wbm_cyc_o[3:2]==2'b00 & wbm_cyc_o[1],wbm_cyc_o[3:1]==3'b000 & wbm_cyc_o[0]} : {nr_of_ports{1'b0}};
5636 
 
5637 
    always @ (idle or wbm_cyc_o)
5638 
    if (idle)
5639 
        casex (wbm_cyc_o)
5640 
        8'b1xxxxxxx : select = 8'b10000000;
5641 
        8'b01xxxxxx : select = 8'b01000000;
5642 
        8'b001xxxxx : select = 8'b00100000;
5643 
        8'b0001xxxx : select = 8'b00010000;
5644 
        8'b00001xxx : select = 8'b00001000;
5645 
        8'b000001xx : select = 8'b00000100;
5646 
        8'b0000001x : select = 8'b00000010;
5647 
        8'b00000001 : select = 8'b00000001;
5648 
        default : select = {nr_of_ports{1'b0}};
5649 
        endcase
5650 
    else
5651 
        select = {nr_of_ports{1'b0}};
5652 
 
5653 
    assign eoc[7] = (wbm_ack_i[7] & (wbm7_cti_o == 3'b000 | wbm7_cti_o == 3'b111)) | !wbm_cyc_o[7];
5654 
    assign eoc[6] = (wbm_ack_i[6] & (wbm6_cti_o == 3'b000 | wbm6_cti_o == 3'b111)) | !wbm_cyc_o[6];
5655 
    assign eoc[5] = (wbm_ack_i[5] & (wbm5_cti_o == 3'b000 | wbm5_cti_o == 3'b111)) | !wbm_cyc_o[5];
5656 
    assign eoc[4] = (wbm_ack_i[4] & (wbm4_cti_o == 3'b000 | wbm4_cti_o == 3'b111)) | !wbm_cyc_o[4];
5657 
    assign eoc[3] = (wbm_ack_i[3] & (wbm3_cti_o == 3'b000 | wbm3_cti_o == 3'b111)) | !wbm_cyc_o[3];
5658 
    assign eoc[2] = (wbm_ack_i[2] & (wbm2_cti_o == 3'b000 | wbm2_cti_o == 3'b111)) | !wbm_cyc_o[2];
5659 
    assign eoc[1] = (wbm_ack_i[1] & (wbm1_cti_o == 3'b000 | wbm1_cti_o == 3'b111)) | !wbm_cyc_o[1];
5660 
    assign eoc[0] = (wbm_ack_i[0] & (wbm0_cti_o == 3'b000 | wbm0_cti_o == 3'b111)) | !wbm_cyc_o[0];
5661 
 
5662 
end
5663 
endgenerate
5664 
 
5665 
generate
5666 63 unneback 
for (i=0;i<nr_of_ports;i=i+1) begin : spr0
5667 42 unneback 
`define MODULE spr
5668 
    `BASE`MODULE sr0( .sp(select[i]), .r(eoc[i]), .q(state[i]), .clk(wb_clk), .rst(wb_rst));
5669 
`undef MODULE
5670 39 unneback 
end
5671 
endgenerate
5672 
 
5673 
    assign sel = select | state;
5674 
 
5675 40 unneback 
`define MODULE mux_andor
5676 
    `BASE`MODULE # ( .nr_of_ports(nr_of_ports), .width(32)) mux0 ( .a(wbm_dat_o), .sel(sel), .dout(wbs_dat_i));
5677 
    `BASE`MODULE # ( .nr_of_ports(nr_of_ports), .width(adr_size-adr_lo)) mux1 ( .a(wbm_adr_o), .sel(sel), .dout(wbs_adr_i));
5678 
    `BASE`MODULE # ( .nr_of_ports(nr_of_ports), .width(sel_size)) mux2 ( .a(wbm_sel_o), .sel(sel), .dout(wbs_sel_i));
5679 
    `BASE`MODULE # ( .nr_of_ports(nr_of_ports), .width(3)) mux3 ( .a(wbm_cti_o), .sel(sel), .dout(wbs_cti_i));
5680 
    `BASE`MODULE # ( .nr_of_ports(nr_of_ports), .width(2)) mux4 ( .a(wbm_bte_o), .sel(sel), .dout(wbs_bte_i));
5681 
    `BASE`MODULE # ( .nr_of_ports(nr_of_ports), .width(1)) mux5 ( .a(wbm_we_o), .sel(sel), .dout(wbs_we_i));
5682 
    `BASE`MODULE # ( .nr_of_ports(nr_of_ports), .width(1)) mux6 ( .a(wbm_stb_o), .sel(sel), .dout(wbs_stb_i));
5683 
`undef MODULE
5684 39 unneback 
    assign wbs_cyc_i = |sel;
5685 
 
5686 
    assign wbm_dat_i = {nr_of_ports{wbs_dat_o}};
5687 
    assign wbm_ack_i = {nr_of_ports{wbs_ack_o}} & sel;
5688 
    assign wbm_err_i = {nr_of_ports{wbs_err_o}} & sel;
5689 
    assign wbm_rty_i = {nr_of_ports{wbs_rty_o}} & sel;
5690 
 
5691 
endmodule
5692 40 unneback 
`endif
5693 39 unneback 
 
5694 101 unneback 
`ifdef WB_RAM
5695 49 unneback 
// WB RAM with byte enable
5696 101 unneback 
`define MODULE wb_ram
5697 59 unneback 
module `BASE`MODULE (
5698 
`undef MODULE
5699 69 unneback 
    wbs_dat_i, wbs_adr_i, wbs_cti_i, wbs_bte_i, wbs_sel_i, wbs_we_i, wbs_stb_i, wbs_cyc_i,
5700 101 unneback 
    wbs_dat_o, wbs_ack_o, wbs_stall_o, wb_clk, wb_rst);
5701 59 unneback 
 
5702 101 unneback 
parameter adr_width = 16;
5703 
parameter mem_size = 1<<adr_width;
5704 
parameter dat_width = 32;
5705 
parameter max_burst_width = 4; // only used for B3
5706 
parameter mode = "B3"; // valid options: B3, B4
5707 60 unneback 
parameter memory_init = 1;
5708 
parameter memory_file = "vl_ram.vmem";
5709 59 unneback 
 
5710 101 unneback 
input [dat_width-1:0] wbs_dat_i;
5711 
input [adr_width-1:0] wbs_adr_i;
5712 
input [2:0] wbs_cti_i;
5713 
input [1:0] wbs_bte_i;
5714 
input [dat_width/8-1:0] wbs_sel_i;
5715 70 unneback 
input wbs_we_i, wbs_stb_i, wbs_cyc_i;
5716 101 unneback 
output [dat_width-1:0] wbs_dat_o;
5717 70 unneback 
output wbs_ack_o;
5718 101 unneback 
output wbs_stall_o;
5719 71 unneback 
input wb_clk, wb_rst;
5720 59 unneback 
 
5721 101 unneback 
wire [adr_width-1:0] adr;
5722 
wire we;
5723 59 unneback 
 
5724 101 unneback 
generate
5725 
if (mode=="B3") begin : B3_inst
5726 83 unneback 
`define MODULE wb_adr_inc
5727 101 unneback 
`BASE`MODULE # ( .adr_width(adr_width), .max_burst_width(max_burst_width)) adr_inc0 (
5728 83 unneback 
    .cyc_i(wbs_cyc_i),
5729 
    .stb_i(wbs_stb_i),
5730 
    .cti_i(wbs_cti_i),
5731 
    .bte_i(wbs_bte_i),
5732 
    .adr_i(wbs_adr_i),
5733 85 unneback 
    .we_i(wbs_we_i),
5734 83 unneback 
    .ack_o(wbs_ack_o),
5735 
    .adr_o(adr),
5736 
    .clk(wb_clk),
5737 
    .rst(wb_rst));
5738 
`undef MODULE
5739 101 unneback 
assign we = wbs_we_i & wbs_ack_o;
5740 
end else if (mode=="B4") begin : B4_inst
5741 
reg wbs_ack_o_reg;
5742 
always @ (posedge wb_clk or posedge wb_rst)
5743 
    if (wb_rst)
5744 
        wbs_ack_o_reg <= 1'b0;
5745 
    else
5746 
        wbs_ack_o_reg <= wbs_stb_i & wbs_cyc_i;
5747 
assign wbs_ack_o = wbs_ack_o_reg;
5748 
assign wbs_stall_o = 1'b0;
5749 
assign adr = wbs_adr_i;
5750 
assign we = wbs_we_i & wbs_cyc_i & wbs_stb_i;
5751 
end
5752 
endgenerate
5753 60 unneback 
 
5754 100 unneback 
`define MODULE ram_be
5755 
`BASE`MODULE # (
5756 
    .data_width(dat_width),
5757 
    .addr_width(adr_width),
5758 
    .mem_size(mem_size),
5759 
    .memory_init(memory_init),
5760 
    .memory_file(memory_file))
5761 
ram0(
5762 
`undef MODULE
5763 101 unneback 
    .d(wbs_dat_i),
5764 
    .adr(adr),
5765 
    .be(wbs_sel_i),
5766 
    .we(we),
5767 
    .q(wbs_dat_o),
5768 100 unneback 
    .clk(wb_clk)
5769 
);
5770 49 unneback 
 
5771 
endmodule
5772 
`endif
5773 
 
5774 103 unneback 
`ifdef WB_SHADOW_RAM
5775 
// A wishbone compliant RAM module that can be placed in front of other memory controllers
5776 
`define MODULE wb_shadow_ram
5777 
module `BASE`MODULE (
5778 
`undef MODULE
5779 
    wbs_dat_i, wbs_adr_i, wbs_cti_i, wbs_bte_i, wbs_sel_i, wbs_we_i, wbs_stb_i, wbs_cyc_i,
5780 
    wbs_dat_o, wbs_ack_o, wbs_stall_o,
5781 
    wbm_dat_o, wbm_adr_o, wbm_cti_o, wbm_bte_o, wbm_sel_o, wbm_we_o, wbm_stb_o, wbm_cyc_o,
5782 
    wbm_dat_i, wbm_ack_i, wbm_stall_i,
5783 
    wb_clk, wb_rst);
5784 
 
5785 
parameter dat_width = 32;
5786 
parameter mode = "B4";
5787 
parameter max_burst_width = 4; // only used for B3
5788 
 
5789 
parameter shadow_mem_adr_width = 10;
5790 
parameter shadow_mem_size = 1024;
5791 
parameter shadow_mem_init = 2;
5792 
parameter shadow_mem_file = "vl_ram.v";
5793 
 
5794 
parameter main_mem_adr_width = 24;
5795 
 
5796 
input [dat_width-1:0] wbs_dat_i;
5797 
input [main_mem_adr_width-1:0] wbs_adr_i;
5798 
input [2:0] wbs_cti_i;
5799 
input [1:0] wbs_bte_i;
5800 
input [dat_width/8-1:0] wbs_sel_i;
5801 
input wbs_we_i, wbs_stb_i, wbs_cyc_i;
5802 
output [dat_width-1:0] wbs_dat_o;
5803 
output wbs_ack_o;
5804 
output wbs_stall_o;
5805 
 
5806 
output [dat_width-1:0] wbm_dat_o;
5807 
output [main_mem_adr_width-1:0] wbm_adr_o;
5808 
output [2:0] wbm_cti_o;
5809 
output [1:0] wbm_bte_o;
5810 
output [dat_width/8-1:0] wbm_sel_o;
5811 
output wbm_we_o, wbm_stb_o, wbm_cyc_o;
5812 
input [dat_width-1:0] wbm_dat_i;
5813 
input wbm_ack_i, wbm_stall_i;
5814 
 
5815 
input wb_clk, wb_rst;
5816 
 
5817 
generate
5818 
if (shadow_mem_size>0) begin : shadow_ram_inst
5819 
 
5820 
wire cyc;
5821 
wire [dat_width-1:0] dat;
5822 
wire stall, ack;
5823 
 
5824 
assign cyc = wbs_cyc_i & (wbs_adr_i<=shadow_mem_size);
5825 
`define MODULE wb_ram
5826 
`BASE`MODULE # (
5827 
    .dat_width(dat_width),
5828 
    .adr_width(shadow_mem_adr_width),
5829 
    .mem_size(shadow_mem_size),
5830 
    .memory_init(shadow_mem_init),
5831 
    .mode(mode))
5832 
shadow_mem0 (
5833 
    .wbs_dat_i(wbs_dat_i),
5834 
    .wbs_adr_i(wbs_adr_i[shadow_mem_adr_width-1:0]),
5835 
    .wbs_sel_i(wbs_sel_i),
5836 
    .wbs_we_i (wbs_we_i),
5837 
    .wbs_bte_i(wbs_bte_i),
5838 
    .wbs_cti_i(wbs_cti_i),
5839 
    .wbs_stb_i(wbs_stb_i),
5840 
    .wbs_cyc_i(cyc),
5841 
    .wbs_dat_o(dat),
5842 
    .wbs_stall_o(stall),
5843 
    .wbs_ack_o(ack),
5844 
    .wb_clk(wb_clk),
5845 
    .wb_rst(wb_rst));
5846 
`undef MODULE
5847 
 
5848 
assign {wbm_dat_o, wbm_adr_o, wbm_cti_o, wbm_bte_o, wbm_sel_o, wbm_we_o, wbm_stb_o} =
5849 
       {wbs_dat_i, wbs_adr_i, wbs_cti_i, wbs_bte_i, wbs_sel_i, wbs_we_i, wbs_stb_i};
5850 
assign wbm_cyc_o = wbs_cyc_i & (wbs_adr_i>shadow_mem_size);
5851 
 
5852 
assign wbs_dat_o = (dat & {dat_width{cyc}}) | (wbm_dat_i & {dat_width{wbm_cyc_o}});
5853 
assign wbs_ack_o = (ack & cyc) | (wbm_ack_i & wbm_cyc_o);
5854 
assign wbs_stall_o = (stall & cyc) | (wbm_stall_i & wbm_cyc_o);
5855 
 
5856 
end else begin : no_shadow_ram_inst
5857 
 
5858 
assign {wbm_dat_o, wbm_adr_o, wbm_cti_o, wbm_bte_o, wbm_sel_o, wbm_we_o, wbm_stb_o, wbm_cyc_o} =
5859 
       {wbs_dat_i, wbs_adr_i, wbs_cti_i, wbs_bte_i, wbs_sel_i, wbs_we_i, wbs_stb_i, wbs_cyc_i};
5860 
assign {wbs_dat_o, wbs_ack_o, wbs_stall_o} = {wbm_dat_i, wbm_ack_i, wbm_stall_i};
5861 
 
5862 
end
5863 
endgenerate
5864 
 
5865 
endmodule
5866 
`endif
5867 
 
5868 48 unneback 
`ifdef WB_B4_ROM
5869 
// WB ROM
5870 
`define MODULE wb_b4_rom
5871 
module `BASE`MODULE (
5872 
`undef MODULE
5873 
    wb_adr_i, wb_stb_i, wb_cyc_i,
5874 
    wb_dat_o, stall_o, wb_ack_o, wb_clk, wb_rst);
5875 
 
5876 
    parameter dat_width = 32;
5877 
    parameter dat_default = 32'h15000000;
5878 
    parameter adr_width = 32;
5879 
 
5880 
/*
5881 
`ifndef ROM
5882 
`define ROM "rom.v"
5883 
`endif
5884 
*/
5885 
    input [adr_width-1:2]   wb_adr_i;
5886 
    input                   wb_stb_i;
5887 
    input                   wb_cyc_i;
5888 
    output [dat_width-1:0]  wb_dat_o;
5889 
    reg [dat_width-1:0]     wb_dat_o;
5890 
    output                  wb_ack_o;
5891 
    reg                     wb_ack_o;
5892 
    output                  stall_o;
5893 
    input                   wb_clk;
5894 
    input                   wb_rst;
5895 
 
5896 
always @ (posedge wb_clk or posedge wb_rst)
5897 
    if (wb_rst)
5898 
        wb_dat_o <= {dat_width{1'b0}};
5899 
    else
5900 
         case (wb_adr_i[adr_width-1:2])
5901 
`ifdef ROM
5902 
`include `ROM
5903 
`endif
5904 
           default:
5905 
             wb_dat_o <= dat_default;
5906 
 
5907 
         endcase // case (wb_adr_i)
5908 
 
5909 
 
5910 
always @ (posedge wb_clk or posedge wb_rst)
5911 
    if (wb_rst)
5912 
        wb_ack_o <= 1'b0;
5913 
    else
5914 
        wb_ack_o <= wb_stb_i & wb_cyc_i;
5915 
 
5916 
assign stall_o = 1'b0;
5917 
 
5918 
endmodule
5919 
`endif
5920 
 
5921 
 
5922 40 unneback 
`ifdef WB_BOOT_ROM
5923 17 unneback 
// WB ROM
5924 40 unneback 
`define MODULE wb_boot_rom
5925 
module `BASE`MODULE (
5926 
`undef MODULE
5927 17 unneback 
    wb_adr_i, wb_stb_i, wb_cyc_i,
5928 18 unneback 
    wb_dat_o, wb_ack_o, hit_o, wb_clk, wb_rst);
5929 17 unneback 
 
5930 18 unneback 
    parameter adr_hi = 31;
5931 
    parameter adr_lo = 28;
5932 
    parameter adr_sel = 4'hf;
5933 
    parameter addr_width = 5;
5934 33 unneback 
/*
5935 17 unneback 
`ifndef BOOT_ROM
5936 
`define BOOT_ROM "boot_rom.v"
5937 
`endif
5938 33 unneback 
*/
5939 18 unneback 
    input [adr_hi:2]    wb_adr_i;
5940 
    input               wb_stb_i;
5941 
    input               wb_cyc_i;
5942 
    output [31:0]        wb_dat_o;
5943 
    output              wb_ack_o;
5944 
    output              hit_o;
5945 
    input               wb_clk;
5946 
    input               wb_rst;
5947 
 
5948 
    wire hit;
5949 
    reg [31:0] wb_dat;
5950 
    reg wb_ack;
5951 
 
5952 
assign hit = wb_adr_i[adr_hi:adr_lo] == adr_sel;
5953 17 unneback 
 
5954 
always @ (posedge wb_clk or posedge wb_rst)
5955 
    if (wb_rst)
5956 18 unneback 
        wb_dat <= 32'h15000000;
5957 17 unneback 
    else
5958 18 unneback 
         case (wb_adr_i[addr_width-1:2])
5959 33 unneback 
`ifdef BOOT_ROM
5960 17 unneback 
`include `BOOT_ROM
5961 33 unneback 
`endif
5962 17 unneback 
           /*
5963 
            // Zero r0 and jump to 0x00000100
5964 18 unneback 
 
5965 
            1 : wb_dat <= 32'hA8200000;
5966 
            2 : wb_dat <= 32'hA8C00100;
5967 
            3 : wb_dat <= 32'h44003000;
5968 
            4 : wb_dat <= 32'h15000000;
5969 17 unneback 
            */
5970 
           default:
5971 18 unneback 
             wb_dat <= 32'h00000000;
5972 17 unneback 
 
5973 
         endcase // case (wb_adr_i)
5974 
 
5975 
 
5976 
always @ (posedge wb_clk or posedge wb_rst)
5977 
    if (wb_rst)
5978 18 unneback 
        wb_ack <= 1'b0;
5979 17 unneback 
    else
5980 18 unneback 
        wb_ack <= wb_stb_i & wb_cyc_i & hit & !wb_ack;
5981 17 unneback 
 
5982 18 unneback 
assign hit_o = hit;
5983 
assign wb_dat_o = wb_dat & {32{wb_ack}};
5984 
assign wb_ack_o = wb_ack;
5985 
 
5986 17 unneback 
endmodule
5987 40 unneback 
`endif
5988 32 unneback 
 
5989 92 unneback 
`ifdef WB_B3_DPRAM
5990 
`define MODULE wb_b3_dpram
5991 40 unneback 
module `BASE`MODULE (
5992 
`undef MODULE
5993 32 unneback 
        // wishbone slave side a
5994 92 unneback 
        wbsa_dat_i, wbsa_adr_i, wbsa_sel_i, wbsa_cti_i, wbsa_bte_i, wbsa_we_i, wbsa_cyc_i, wbsa_stb_i, wbsa_dat_o, wbsa_ack_o,
5995 32 unneback 
        wbsa_clk, wbsa_rst,
5996 92 unneback 
        // wishbone slave side b
5997 
        wbsb_dat_i, wbsb_adr_i, wbsb_sel_i, wbsb_cti_i, wbsb_bte_i, wbsb_we_i, wbsb_cyc_i, wbsb_stb_i, wbsb_dat_o, wbsb_ack_o,
5998 32 unneback 
        wbsb_clk, wbsb_rst);
5999 
 
6000 92 unneback 
parameter data_width_a = 32;
6001 
parameter data_width_b = data_width_a;
6002 
parameter addr_width_a = 8;
6003 
localparam addr_width_b = data_width_a * addr_width_a / data_width_b;
6004 101 unneback 
parameter mem_size = (addr_width_a>addr_width_b) ? (1<<addr_width_a) : (1<<addr_width_b);
6005 92 unneback 
parameter max_burst_width_a = 4;
6006 
parameter max_burst_width_b = max_burst_width_a;
6007 101 unneback 
parameter mode = "B3";
6008 92 unneback 
input [data_width_a-1:0] wbsa_dat_i;
6009 
input [addr_width_a-1:0] wbsa_adr_i;
6010 
input [data_width_a/8-1:0] wbsa_sel_i;
6011 
input [2:0] wbsa_cti_i;
6012 
input [1:0] wbsa_bte_i;
6013 32 unneback 
input wbsa_we_i, wbsa_cyc_i, wbsa_stb_i;
6014 92 unneback 
output [data_width_a-1:0] wbsa_dat_o;
6015 32 unneback 
output wbsa_ack_o;
6016 
input wbsa_clk, wbsa_rst;
6017 
 
6018 92 unneback 
input [data_width_b-1:0] wbsb_dat_i;
6019 
input [addr_width_b-1:0] wbsb_adr_i;
6020 
input [data_width_b/8-1:0] wbsb_sel_i;
6021 
input [2:0] wbsb_cti_i;
6022 
input [1:0] wbsb_bte_i;
6023 32 unneback 
input wbsb_we_i, wbsb_cyc_i, wbsb_stb_i;
6024 92 unneback 
output [data_width_b-1:0] wbsb_dat_o;
6025 32 unneback 
output wbsb_ack_o;
6026 
input wbsb_clk, wbsb_rst;
6027 
 
6028 92 unneback 
wire [addr_width_a-1:0] adr_a;
6029 
wire [addr_width_b-1:0] adr_b;
6030 101 unneback 
wire we_a, we_b;
6031 
generate
6032 
if (mode=="B3") begin : b3_inst
6033 92 unneback 
`define MODULE wb_adr_inc
6034 
`BASE`MODULE # ( .adr_width(addr_width_a), .max_burst_width(max_burst_width_a)) adr_inc0 (
6035 
    .cyc_i(wbsa_cyc_i),
6036 
    .stb_i(wbsa_stb_i),
6037 
    .cti_i(wbsa_cti_i),
6038 
    .bte_i(wbsa_bte_i),
6039 
    .adr_i(wbsa_adr_i),
6040 
    .we_i(wbsa_we_i),
6041 
    .ack_o(wbsa_ack_o),
6042 
    .adr_o(adr_a),
6043 
    .clk(wbsa_clk),
6044 
    .rst(wbsa_rst));
6045 101 unneback 
assign we_a = wbsa_we_i & wbsa_ack_o;
6046 92 unneback 
`BASE`MODULE # ( .adr_width(addr_width_b), .max_burst_width(max_burst_width_b)) adr_inc1 (
6047 
    .cyc_i(wbsb_cyc_i),
6048 
    .stb_i(wbsb_stb_i),
6049 
    .cti_i(wbsb_cti_i),
6050 
    .bte_i(wbsb_bte_i),
6051 
    .adr_i(wbsb_adr_i),
6052 
    .we_i(wbsb_we_i),
6053 
    .ack_o(wbsb_ack_o),
6054 
    .adr_o(adr_b),
6055 
    .clk(wbsb_clk),
6056 
    .rst(wbsb_rst));
6057 40 unneback 
`undef MODULE
6058 101 unneback 
assign we_b = wbsb_we_i & wbsb_ack_o;
6059 
end else if (mode=="B4") begin : b4_inst
6060 
always @ (posedge wbsa_clk or posedge wbsa_rst)
6061 
    if (wbsa_rst)
6062 
        wbsa_ack_o <= 1'b0;
6063 
    else
6064 
        wbsa_ack_o <= wbsa_stb_i & wbsa_cyc_i;
6065 
assign wbsa_stall_o = 1'b0;
6066 
assign we_a = wbsa_we_i & wbsa_cyc_i & wbsa_stb_i;
6067 
always @ (posedge wbsb_clk or posedge wbsb_rst)
6068 
    if (wbsb_rst)
6069 
        wbsb_ack_o <= 1'b0;
6070 
    else
6071 
        wbsb_ack_o <= wbsb_stb_i & wbsb_cyc_i;
6072 
assign wbsb_stall_o = 1'b0;
6073 
assign we_b = wbsb_we_i & wbsb_cyc_i & wbsb_stb_i;
6074 
end
6075 
endgenerate
6076 92 unneback 
 
6077 
`define MODULE dpram_be_2r2w
6078 
`BASE`MODULE # ( .a_data_width(data_width_a), .a_addr_width(addr_width_a), .mem_size(mem_size))
6079 
`undef MODULE
6080 
ram_i (
6081 32 unneback 
    .d_a(wbsa_dat_i),
6082 92 unneback 
    .q_a(wbsa_dat_o),
6083 
    .adr_a(adr_a),
6084 
    .be_a(wbsa_sel_i),
6085 101 unneback 
    .we_a(we_a),
6086 32 unneback 
    .clk_a(wbsa_clk),
6087 
    .d_b(wbsb_dat_i),
6088 92 unneback 
    .q_b(wbsb_dat_o),
6089 
    .adr_b(adr_b),
6090 
    .be_b(wbsb_sel_i),
6091 101 unneback 
    .we_b(we_b),
6092 32 unneback 
    .clk_b(wbsb_clk) );
6093 
 
6094 
endmodule
6095 40 unneback 
`endif
6096 94 unneback 
 
6097 101 unneback 
`ifdef WB_CACHE
6098 
`define MODULE wb_cache
6099 97 unneback 
module `BASE`MODULE (
6100 103 unneback 
    wbs_dat_i, wbs_adr_i, wbs_sel_i, wbs_cti_i, wbs_bte_i, wbs_we_i, wbs_stb_i, wbs_cyc_i, wbs_dat_o, wbs_ack_o, wbs_stall_o, wbs_clk, wbs_rst,
6101 98 unneback 
    wbm_dat_o, wbm_adr_o, wbm_sel_o, wbm_cti_o, wbm_bte_o, wbm_we_o, wbm_stb_o, wbm_cyc_o, wbm_dat_i, wbm_ack_i, wbm_stall_i, wbm_clk, wbm_rst
6102 97 unneback 
);
6103 
`undef MODULE
6104 
 
6105 
parameter dw_s = 32;
6106 
parameter aw_s = 24;
6107 
parameter dw_m = dw_s;
6108 100 unneback 
localparam aw_m = dw_s * aw_s / dw_m;
6109 
parameter wbs_max_burst_width = 4;
6110 103 unneback 
parameter wbs_mode = "B3";
6111 97 unneback 
 
6112 
parameter async = 1; // wbs_clk != wbm_clk
6113 
 
6114 
parameter nr_of_ways = 1;
6115 
parameter aw_offset = 4; // 4 => 16 words per cache line
6116 
parameter aw_slot = 10;
6117 100 unneback 
 
6118 
parameter valid_mem = 0;
6119 
parameter debug = 0;
6120 
 
6121 
localparam aw_b_offset = aw_offset * dw_s / dw_m;
6122 98 unneback 
localparam aw_tag = aw_s - aw_slot - aw_offset;
6123 97 unneback 
parameter wbm_burst_size = 4; // valid options 4,8,16
6124 98 unneback 
localparam bte = (wbm_burst_size==4) ? 2'b01 : (wbm_burst_size==8) ? 2'b10 : 2'b11;
6125 97 unneback 
`define SIZE2WIDTH wbm_burst_size
6126 
localparam wbm_burst_width `SIZE2WIDTH_EXPR
6127 
`undef SIZE2WIDTH
6128 
localparam nr_of_wbm_burst = ((1<<aw_offset)/wbm_burst_size) * dw_s / dw_m;
6129 
`define SIZE2WIDTH nr_of_wbm_burst
6130 
localparam nr_of_wbm_burst_width `SIZE2WIDTH_EXPR
6131 
`undef SIZE2WIDTH
6132 100 unneback 
 
6133 97 unneback 
input [dw_s-1:0] wbs_dat_i;
6134 
input [aw_s-1:0] wbs_adr_i; // dont include a1,a0
6135 98 unneback 
input [dw_s/8-1:0] wbs_sel_i;
6136 97 unneback 
input [2:0] wbs_cti_i;
6137 
input [1:0] wbs_bte_i;
6138 98 unneback 
input wbs_we_i, wbs_stb_i, wbs_cyc_i;
6139 97 unneback 
output [dw_s-1:0] wbs_dat_o;
6140 
output wbs_ack_o;
6141 103 unneback 
output wbs_stall_o;
6142 97 unneback 
input wbs_clk, wbs_rst;
6143 
 
6144 
output [dw_m-1:0] wbm_dat_o;
6145 
output [aw_m-1:0] wbm_adr_o;
6146 
output [dw_m/8-1:0] wbm_sel_o;
6147 
output [2:0] wbm_cti_o;
6148 
output [1:0] wbm_bte_o;
6149 98 unneback 
output wbm_stb_o, wbm_cyc_o, wbm_we_o;
6150 97 unneback 
input [dw_m-1:0] wbm_dat_i;
6151 
input wbm_ack_i;
6152 
input wbm_stall_i;
6153 
input wbm_clk, wbm_rst;
6154 
 
6155 100 unneback 
wire valid, dirty, hit;
6156 97 unneback 
wire [aw_tag-1:0] tag;
6157 
wire tag_mem_we;
6158 
wire [aw_tag-1:0] wbs_adr_tag;
6159 
wire [aw_slot-1:0] wbs_adr_slot;
6160 98 unneback 
wire [aw_offset-1:0] wbs_adr_word;
6161 
wire [aw_s-1:0] wbs_adr;
6162 97 unneback 
 
6163 
reg [1:0] state;
6164 
localparam idle = 2'h0;
6165 
localparam rdwr = 2'h1;
6166 
localparam push = 2'h2;
6167 
localparam pull = 2'h3;
6168 
wire eoc;
6169 103 unneback 
wire we;
6170 97 unneback 
 
6171 
// cdc
6172 
wire done, mem_alert, mem_done;
6173 
 
6174 98 unneback 
// wbm side
6175 
reg [aw_m-1:0] wbm_radr;
6176 
reg [aw_m-1:0] wbm_wadr;
6177 100 unneback 
wire [aw_slot-1:0] wbm_adr;
6178 98 unneback 
wire wbm_radr_cke, wbm_wadr_cke;
6179 
 
6180 100 unneback 
reg [2:0] phase;
6181 
// phase = {we,stb,cyc}
6182 
localparam wbm_wait     = 3'b000;
6183 
localparam wbm_wr       = 3'b111;
6184 
localparam wbm_wr_drain = 3'b101;
6185 
localparam wbm_rd       = 3'b011;
6186 
localparam wbm_rd_drain = 3'b001;
6187 98 unneback 
 
6188 97 unneback 
assign {wbs_adr_tag, wbs_adr_slot, wbs_adr_word} = wbs_adr_i;
6189 
 
6190 100 unneback 
generate
6191 
if (valid_mem==0) begin : no_valid_mem
6192 
assign valid = 1'b1;
6193 
end else begin : valid_mem_inst
6194 
`define MODULE dpram_1r1w
6195 97 unneback 
`BASE`MODULE
6196 100 unneback 
    # ( .data_width(1), .addr_width(aw_slot), .memory_init(2), .debug(debug))
6197 
    valid_mem ( .d_a(1'b1), .adr_a(wbs_adr_slot), .we_a(mem_done), .clk_a(wbm_clk),
6198 
                .q_b(valid), .adr_b(wbs_adr_slot), .clk_b(wbs_clk));
6199 97 unneback 
`undef MODULE
6200 100 unneback 
end
6201 
endgenerate
6202 97 unneback 
 
6203 100 unneback 
`define MODULE dpram_1r1w
6204 
`BASE`MODULE
6205 
    # ( .data_width(aw_tag), .addr_width(aw_slot), .memory_init(2), .debug(debug))
6206 
    tag_mem ( .d_a(wbs_adr_tag), .adr_a(wbs_adr_slot), .we_a(mem_done), .clk_a(wbm_clk),
6207 
              .q_b(tag), .adr_b(wbs_adr_slot), .clk_b(wbs_clk));
6208 
assign hit = wbs_adr_tag == tag;
6209 
`undef MODULE
6210 
 
6211 
`define MODULE dpram_1r2w
6212 
`BASE`MODULE
6213 
    # ( .data_width(1), .addr_width(aw_slot), .memory_init(2), .debug(debug))
6214 
    dirty_mem (
6215 
        .d_a(1'b1), .q_a(dirty), .adr_a(wbs_adr_slot), .we_a(wbs_cyc_i & wbs_we_i & wbs_ack_o), .clk_a(wbs_clk),
6216 
        .d_b(1'b0), .adr_b(wbs_adr_slot), .we_b(mem_done), .clk_b(wbm_clk));
6217 
`undef MODULE
6218 
 
6219 103 unneback 
generate
6220 
if (wbs_mode=="B3") begin : inst_b3
6221 97 unneback 
`define MODULE wb_adr_inc
6222 100 unneback 
`BASE`MODULE # ( .adr_width(aw_s), .max_burst_width(wbs_max_burst_width)) adr_inc0 (
6223 
    .cyc_i(wbs_cyc_i & (state==rdwr) & hit & valid),
6224 
    .stb_i(wbs_stb_i & (state==rdwr) & hit & valid), // throttle depending on valid
6225 97 unneback 
    .cti_i(wbs_cti_i),
6226 
    .bte_i(wbs_bte_i),
6227 
    .adr_i(wbs_adr_i),
6228 
    .we_i (wbs_we_i),
6229 
    .ack_o(wbs_ack_o),
6230 
    .adr_o(wbs_adr),
6231 100 unneback 
    .clk(wbs_clk),
6232 
    .rst(wbs_rst));
6233 97 unneback 
`undef MODULE
6234 103 unneback 
assign eoc = (wbs_cti_i==3'b000 | wbs_cti_i==3'b111) & wbs_ack_o;
6235 
assign we = wbs_cyc_i &  wbs_we_i & wbs_ack_o;
6236 
end else if (wbs_mode=="B4") begin : inst_b4
6237 
end
6238 97 unneback 
 
6239 103 unneback 
endgenerate
6240 
 
6241 97 unneback 
`define MODULE dpram_be_2r2w
6242 
`BASE`MODULE
6243 100 unneback 
    # ( .a_data_width(dw_s), .a_addr_width(aw_slot+aw_offset), .b_data_width(dw_m), .debug(debug))
6244 103 unneback 
    cache_mem ( .d_a(wbs_dat_i), .adr_a(wbs_adr[aw_slot+aw_offset-1:0]),   .be_a(wbs_sel_i), .we_a(we), .q_a(wbs_dat_o), .clk_a(wbs_clk),
6245 100 unneback 
                .d_b(wbm_dat_i), .adr_b(wbm_adr_o[aw_slot+aw_offset-1:0]), .be_b(wbm_sel_o), .we_b(wbm_cyc_o & !wbm_we_o & wbs_ack_i), .q_b(wbm_dat_o), .clk_b(wbm_clk));
6246 97 unneback 
`undef MODULE
6247 
 
6248 
always @ (posedge wbs_clk or posedge wbs_rst)
6249 
if (wbs_rst)
6250 98 unneback 
    state <= idle;
6251 97 unneback 
else
6252 
    case (state)
6253 
    idle:
6254 
        if (wbs_cyc_i)
6255 
            state <= rdwr;
6256 
    rdwr:
6257 100 unneback 
        casex ({valid, hit, dirty, eoc})
6258 
        4'b0xxx: state <= pull;
6259 
        4'b11x1: state <= idle;
6260 
        4'b101x: state <= push;
6261 
        4'b100x: state <= pull;
6262 
        endcase
6263 97 unneback 
    push:
6264 
        if (done)
6265 
            state <= rdwr;
6266 
    pull:
6267 
        if (done)
6268 
            state <= rdwr;
6269 
    default: state <= idle;
6270 
    endcase
6271 
 
6272 
// cdc
6273 
generate
6274 
if (async==1) begin : cdc0
6275 
`define MODULE cdc
6276 100 unneback 
`BASE`MODULE cdc0 ( .start_pl(state==rdwr & (!valid | !hit)), .take_it_pl(mem_alert), .take_it_grant_pl(mem_done), .got_it_pl(done), .clk_src(wbs_clk), .rst_src(wbs_rst), .clk_dst(wbm_clk), .rst_dst(wbm_rst));
6277 97 unneback 
`undef MODULE
6278 
end
6279 
else begin : nocdc
6280 100 unneback 
    assign mem_alert = state==rdwr & (!valid | !hit);
6281 97 unneback 
    assign done = mem_done;
6282 
end
6283 
endgenerate
6284 
 
6285 
// FSM generating a number of burts 4 cycles
6286 
// actual number depends on data width ratio
6287 
// nr_of_wbm_burst
6288 101 unneback 
reg [nr_of_wbm_burst_width+wbm_burst_width-1:0]       cnt_rw, cnt_ack;
6289 97 unneback 
 
6290 
always @ (posedge wbm_clk or posedge wbm_rst)
6291 
if (wbm_rst)
6292 100 unneback 
    cnt_rw <= {wbm_burst_width{1'b0}};
6293 97 unneback 
else
6294 100 unneback 
    if (wbm_cyc_o & wbm_stb_o & !wbm_stall_i)
6295 
        cnt_rw <= cnt_rw + 1;
6296 97 unneback 
 
6297 98 unneback 
always @ (posedge wbm_clk or posedge wbm_rst)
6298 
if (wbm_rst)
6299 100 unneback 
    cnt_ack <= {wbm_burst_width{1'b0}};
6300 98 unneback 
else
6301 100 unneback 
    if (wbm_ack_i)
6302 
        cnt_ack <= cnt_ack + 1;
6303 97 unneback 
 
6304 100 unneback 
generate
6305 101 unneback 
if (nr_of_wbm_burst==1) begin : one_burst
6306 100 unneback 
 
6307 98 unneback 
always @ (posedge wbm_clk or posedge wbm_rst)
6308 
if (wbm_rst)
6309 
    phase <= wbm_wait;
6310 
else
6311 
    case (phase)
6312 
    wbm_wait:
6313 
        if (mem_alert)
6314 100 unneback 
            if (state==push)
6315 
                phase <= wbm_wr;
6316 
            else
6317 
                phase <= wbm_rd;
6318 98 unneback 
    wbm_wr:
6319 100 unneback 
        if (&cnt_rw)
6320 
            phase <= wbm_wr_drain;
6321 
    wbm_wr_drain:
6322 
        if (&cnt_ack)
6323 98 unneback 
            phase <= wbm_rd;
6324 
    wbm_rd:
6325 100 unneback 
        if (&cnt_rw)
6326 
            phase <= wbm_rd_drain;
6327 
    wbm_rd_drain:
6328 
        if (&cnt_ack)
6329 
            phase <= wbm_wait;
6330 98 unneback 
    default: phase <= wbm_wait;
6331 
    endcase
6332 
 
6333 100 unneback 
end else begin : multiple_burst
6334 
 
6335 101 unneback 
always @ (posedge wbm_clk or posedge wbm_rst)
6336 
if (wbm_rst)
6337 
    phase <= wbm_wait;
6338 
else
6339 
    case (phase)
6340 
    wbm_wait:
6341 
        if (mem_alert)
6342 
            if (state==push)
6343 
                phase <= wbm_wr;
6344 
            else
6345 
                phase <= wbm_rd;
6346 
    wbm_wr:
6347 
        if (&cnt_rw[wbm_burst_width-1:0])
6348 
            phase <= wbm_wr_drain;
6349 
    wbm_wr_drain:
6350 
        if (&cnt_ack)
6351 
            phase <= wbm_rd;
6352 
        else if (&cnt_ack[wbm_burst_width-1:0])
6353 
            phase <= wbm_wr;
6354 
    wbm_rd:
6355 
        if (&cnt_rw[wbm_burst_width-1:0])
6356 
            phase <= wbm_rd_drain;
6357 
    wbm_rd_drain:
6358 
        if (&cnt_ack)
6359 
            phase <= wbm_wait;
6360 
        else if (&cnt_ack[wbm_burst_width-1:0])
6361 
            phase <= wbm_rd;
6362 
    default: phase <= wbm_wait;
6363 
    endcase
6364 100 unneback 
 
6365 101 unneback 
 
6366 100 unneback 
end
6367 
endgenerate
6368 
 
6369 101 unneback 
assign mem_done = phase==wbm_rd_drain & (&cnt_ack) & wbm_ack_i;
6370 100 unneback 
 
6371 
assign wbm_adr_o = (phase[2]) ? {tag, wbs_adr_slot, cnt_rw} : {wbs_adr_tag, wbs_adr_slot, cnt_rw};
6372 
assign wbm_adr   = (phase[2]) ? {wbs_adr_slot, cnt_rw} : {wbs_adr_slot, cnt_rw};
6373 
assign wbm_sel_o = {dw_m/8{1'b1}};
6374 
assign wbm_cti_o = (&cnt_rw | !wbm_stb_o) ? 3'b111 : 3'b010;
6375 98 unneback 
assign wbm_bte_o = bte;
6376 100 unneback 
assign {wbm_we_o, wbm_stb_o, wbm_cyc_o}  = phase;
6377 98 unneback 
 
6378 97 unneback 
endmodule
6379 
`endif
6380 103 unneback 
 
6381 
`ifdef WB_AVALON_BRIDGE
6382 
// Wishbone to avalon bridge supporting one type of burst transfer only
6383 
// intended use is together with cache above
6384 
// WB B4 -> pipelined avalon
6385 
`define MODULE wb_avalon_bridge
6386 
module `BASE`MODULE (
6387 
`undef MODULE
6388 
        // wishbone slave side
6389 
        wbs_dat_i, wbs_adr_i, wbs_sel_i, wbs_bte_i, wbs_cti_i, wbs_we_i, wbs_cyc_i, wbs_stb_i, wbs_dat_o, wbs_ack_o, wbs_stall_o,
6390 
        // avalon master side
6391 
        readdata, readdatavalid, address, read, be, write, burstcount, writedata, waitrequest, beginbursttransfer,
6392 
        // common
6393 
        clk, rst);
6394 
 
6395 
parameter adr_width = 30;
6396 
parameter dat_width = 32;
6397 
parameter burst_size = 4;
6398 
 
6399 
input [dat_width-1:0] wbs_dat_i;
6400 
input [adr_width-1:0] wbs_adr_i;
6401 
input [dat_width/8-1:0]  wbs_sel_i;
6402 
input [1:0]  wbs_bte_i;
6403 
input [2:0]  wbs_cti_i;
6404 
input wbs_we_i;
6405 
input wbs_cyc_i;
6406 
input wbs_stb_i;
6407 
output [dat_width:0] wbs_dat_o;
6408 
output wbs_ack_o;
6409 
output wbs_stall_o;
6410 
 
6411 
input [dat_width-1:0] readdata;
6412 
input readdatavalid;
6413 
output [dat_width-1:0] writedata;
6414 
output [adr_width-1:0] address;
6415 
output [dat_width/8-1:0]  be;
6416 
output write;
6417 
output read;
6418 
output beginbursttransfer;
6419 
output [3:0] burstcount;
6420 
input waitrequest;
6421 
input clk, rst;
6422 
 
6423 
reg last_cyc_idle_or_eoc;
6424 
 
6425 
reg [3:0] cnt;
6426 
always @ (posedge clk or posedge rst)
6427 
if (rst)
6428 
    cnt <= 4'h0;
6429 
else
6430 
    if (beginbursttransfer & waitrequest)
6431 
        cnt <= burst_size - 1;
6432 
    else if (beginbursttransfer & !waitrequest)
6433 
        cnt <= burst_size - 2;
6434 
    else if (wbs_ack_o)
6435 
        cnt <= cnt - 1;
6436 
 
6437 
reg wr_ack;
6438 
always @ (posedge clk or posedge rst)
6439 
if (rst)
6440 
    wr_ack <= 1'b0;
6441 
else
6442 
    wr_ack <=  (wbs_we_i & wbs_cyc_i & wbs_stb_i & !wbs_stall_o);
6443 
 
6444 
// to avalon
6445 
assign writedata = wbs_dat_i;
6446 
assign address = wbs_adr_i;
6447 
assign be = wbs_sel_i;
6448 
assign write = cnt==(burst_size-1) & wbs_cyc_i &  wbs_we_i;
6449 
assign read  = cnt==(burst_size-1) & wbs_cyc_i & !wbs_we_i;
6450 
assign beginbursttransfer = cnt==4'h0 & wbs_cyc_i;
6451 
assign burstcount = burst_size;
6452 
 
6453 
// to wishbone
6454 
assign wbs_dat_o = readdata;
6455 
assign wbs_ack_o = wr_ack | readdatavalid;
6456 
assign wbs_stall_o = waitrequest;
6457 
 
6458 
endmodule
6459 
`endif
6460 
 
6461 
`ifdef WB_AVALON_MEM_CACHE
6462 
`define MODULE wb_avalon_mem_cache
6463 
module `BASE`MODULE (
6464 
    wbs_dat_i, wbs_adr_i, wbs_sel_i, wbs_cti_i, wbs_bte_i, wbs_we_i, wbs_stb_i, wbs_cyc_i, wbs_dat_o, wbs_ack_o, wbs_stall_o, wbs_clk, wbs_rst,
6465 
    readdata, readdatavalid, address, read, be, write, burstcount, writedata, waitrequest, beginbursttransfer, clk, rst
6466 
);
6467 
`undef MODULE
6468 
 
6469 
// wishbone
6470 
parameter wb_dat_width = 32;
6471 
parameter wb_adr_width = 22;
6472 
parameter wb_max_burst_width = 4;
6473 
parameter wb_mode = "B4";
6474 
// avalon
6475 
parameter avalon_dat_width = 32;
6476 
localparam avalon_adr_width = wb_dat_width * wb_adr_width / avalon_dat_width;
6477 
parameter avalon_burst_size = 4;
6478 
// cache
6479 
parameter async = 1;
6480 
parameter nr_of_ways = 1;
6481 
parameter aw_offset = 4;
6482 
parameter aw_slot = 10;
6483 
parameter valid_mem = 1;
6484 
// shadow RAM
6485 
parameter shadow_ram = 0;
6486 
parameter shadow_ram_adr_width = 10;
6487 
parameter shadow_ram_size = 1024;
6488 
parameter shadow_ram_init = 2; // 0: no init, 1: from file, 2: with zero
6489 
parameter shadow_ram_file = "vl_ram.v";
6490 
 
6491 
input [wb_dat_width-1:0] wbs_dat_i;
6492 
input [wb_adr_width-1:0] wbs_adr_i; // dont include a1,a0
6493 
input [wb_dat_width/8-1:0] wbs_sel_i;
6494 
input [2:0] wbs_cti_i;
6495 
input [1:0] wbs_bte_i;
6496 
input wbs_we_i, wbs_stb_i, wbs_cyc_i;
6497 
output [wb_dat_width-1:0] wbs_dat_o;
6498 
output wbs_ack_o;
6499 
output wbs_stall_o;
6500 
input wbs_clk, wbs_rst;
6501 
 
6502 
input [avalon_dat_width-1:0] readdata;
6503 
input readdatavalid;
6504 
output [avalon_dat_width-1:0] writedata;
6505 
output [avalon_adr_width-1:0] address;
6506 
output [avalon_dat_width/8-1:0]  be;
6507 
output write;
6508 
output read;
6509 
output beginbursttransfer;
6510 
output [3:0] burstcount;
6511 
input waitrequest;
6512 
input clk, rst;
6513 
 
6514 
`define DAT_WIDTH wb_dat_width
6515 
`define ADR_WIDTH wb_adr_width
6516 
`define WB wb1
6517 
`include "wb_wires.v"
6518 
`define WB wb2
6519 
`include "wb_wires.v"
6520 
`undef DAT_WIDTH
6521 
`undef ADR_WIDTH
6522 
 
6523 
`define MODULE wb_shadow_ram
6524 
`BASE`MODULE # ( .dat_width(wb_dat_width), .mode(wb_mode), .max_burst_width(wb_max_burst_width),
6525 
                 .shadow_mem_adr_width(shadow_ram_adr_width), .shadow_mem_size(shadow_ram_adr_width), .shadow_mem_init(shadow_ram_init), .shadow_mem_file(shadow_ram_file),
6526 
                 .main_mem_adr_width(wb_adr_width))
6527 
shadow_ram0 (
6528 
    .wbs_dat_i(wbs_dat_i), .wbs_adr_i(wbs_adr_i), .wbs_cti_i(wbs_cti_i), .wbs_bte_i(wbs_bte_i), .wbs_sel_i(wbs_sel_i), .wbs_we_i(wbs_we_i), .wbs_stb_i(wbs_stb_i), .wbs_cyc_i(wbs_cyc_i),
6529 
    .wbs_dat_o(wbs_dat_o), .wbs_ack_o(wbs_ack_o), .wbs_stall_o(wbs_stall_o),
6530 
    .wbm_dat_o(wb1_dat_o), .wbm_adr_o(wb1_adr_o), .wbm_cti_o(wb1_cti_o), .wbm_bte_o(wb1_bte_o), .wbm_sel_o(wb1_sel_o), .wbm_we_o(wb1_we_o), .wbm_stb_o(wb1_stb_o), .wbm_cyc_o(wb1_cyc_o),
6531 
    .wbm_dat_i(wb1_dat_i), .wbm_ack_i(wb1_ack_i), .wbm_stall_i(wb1_stall_i),
6532 
    .wb_clk(wbs_clk), .wb_rst(wbs_rst));
6533 
`undef MODULE
6534 
 
6535 
`define MODULE wb_cache
6536 
`BASE`MODULE
6537 
# ( .dw_s(wb_dat_width), .aw_s(wb_adr_width), .dw_m(avalon_dat_width), .wbs_mode(wb_mode), .wbs_max_burst_width(wb_max_burst_width), .async(async), .nr_of_ways(nr_of_ways), .aw_offset(aw_offset), .aw_slot(aw_slot), .valid_mem(valid_mem))
6538 
cache0 (
6539 
    .wbs_dat_i(wb1_dat_o), .wbs_adr_i(wb1_adr_o), .wbs_sel_i(wb1_sel_o), .wbs_cti_i(wb1_cti_o), .wbs_bte_i(wb1_bte_o), .wbs_we_i(wb1_we_o), .wbs_stb_i(wb1_stb_o), .wbs_cyc_i(wb1_cyc_o),
6540 
    .wbs_dat_o(wb1_dat_i), .wbs_ack_o(wb1_ack_i), .wbs_stall_o(wb1_stall_i), .wbs_clk(wbs_clk), .wbs_rst(wbs_rst),
6541 
    .wbm_dat_o(wb2_dat_o), .wbm_adr_o(wb2_adr_o), .wbm_sel_o(wb2_sel_o), .wbm_cti_o(wb2_cti_o), .wbm_bte_o(wb2_bte_o), .wbm_we_o(wb2_we_o), .wbm_stb_o(wb2_stb_o), .wbm_cyc_o(wb2_cyc_o),
6542 
    .wbm_dat_i(wb2_dat_i), .wbm_ack_i(wb2_ack_i), .wbm_stall_i(wb2_stall_i), .wbm_clk(clk), .wbm_rst(rst));
6543 
`undef MODULE
6544 
 
6545 
`define MODULE wb_avalon_bridge
6546 
`BASE`MODULE # ( .adr_width(avalon_adr_width), .dat_width(avalon_dat_width), .burst_size(avalon_burst_size))
6547 
bridge0 (
6548 
        // wishbone slave side
6549 
        .wbs_dat_i(wb2_dat_o), .wbs_adr_i(wb2_adr_o), .wbs_sel_i(wb2_sel_o), .wbs_bte_i(wb2_bte_o), .wbs_cti_i(wb2_cti_o), .wbs_we_i(wb2_we_o), .wbs_cyc_i(wb2_cyc_o), .wbs_stb_i(wb2_stb_o),
6550 
        .wbs_dat_o(wb2_dat_i), .wbs_ack_o(wb2_ack_i), .wbs_stall_o(wb2_stall_i),
6551 
        // avalon master side
6552 
        .readdata(readdata), .readdatavalid(readdatavalid), .address(address), .read(read), .be(be), .write(write), .burstcount(burstcount), .writedata(writedata), .waitrequest(waitrequest), .beginbursttransfer(beginbursttransfer),
6553 
        // common
6554 
        .clk(clk), .rst(rst));
6555 
`undef MODULE
6556 
 
6557 
endmodule
6558 
`endif
6559 18 unneback 
//////////////////////////////////////////////////////////////////////
6560 
////                                                              ////
6561 
////  Arithmetic functions                                        ////
6562 
////                                                              ////
6563 
////  Description                                                 ////
6564 
////  Arithmetic functions for ALU and DSP                        ////
6565 
////                                                              ////
6566 
////                                                              ////
6567 
////  To Do:                                                      ////
6568 
////   -                                                          ////
6569 
////                                                              ////
6570 
////  Author(s):                                                  ////
6571 
////      - Michael Unneback, unneback@opencores.org              ////
6572 
////        ORSoC AB                                              ////
6573 
////                                                              ////
6574 
//////////////////////////////////////////////////////////////////////
6575 
////                                                              ////
6576 
//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////
6577 
////                                                              ////
6578 
//// This source file may be used and distributed without         ////
6579 
//// restriction provided that this copyright statement is not    ////
6580 
//// removed from the file and that any derivative work contains  ////
6581 
//// the original copyright notice and the associated disclaimer. ////
6582 
////                                                              ////
6583 
//// This source file is free software; you can redistribute it   ////
6584 
//// and/or modify it under the terms of the GNU Lesser General   ////
6585 
//// Public License as published by the Free Software Foundation; ////
6586 
//// either version 2.1 of the License, or (at your option) any   ////
6587 
//// later version.                                               ////
6588 
////                                                              ////
6589 
//// This source is distributed in the hope that it will be       ////
6590 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
6591 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
6592 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
6593 
//// details.                                                     ////
6594 
////                                                              ////
6595 
//// You should have received a copy of the GNU Lesser General    ////
6596 
//// Public License along with this source; if not, download it   ////
6597 
//// from http://www.opencores.org/lgpl.shtml                     ////
6598 
////                                                              ////
6599 
//////////////////////////////////////////////////////////////////////
6600 
 
6601 40 unneback 
`ifdef MULTS
6602 18 unneback 
// signed multiplication
6603 40 unneback 
`define MODULE mults
6604 
module `BASE`MODULE (a,b,p);
6605 
`undef MODULE
6606 18 unneback 
parameter operand_a_width = 18;
6607 
parameter operand_b_width = 18;
6608 
parameter result_hi = 35;
6609 
parameter result_lo = 0;
6610 
input [operand_a_width-1:0] a;
6611 
input [operand_b_width-1:0] b;
6612 
output [result_hi:result_lo] p;
6613 
wire signed [operand_a_width-1:0] ai;
6614 
wire signed [operand_b_width-1:0] bi;
6615 
wire signed [operand_a_width+operand_b_width-1:0] result;
6616 
 
6617 
    assign ai = a;
6618 
    assign bi = b;
6619 
    assign result = ai * bi;
6620 
    assign p = result[result_hi:result_lo];
6621 
 
6622 
endmodule
6623 40 unneback 
`endif
6624 
`ifdef MULTS18X18
6625 
`define MODULE mults18x18
6626 
module `BASE`MODULE (a,b,p);
6627 
`undef MODULE
6628 18 unneback 
input [17:0] a,b;
6629 
output [35:0] p;
6630 
vl_mult
6631 
    # (.operand_a_width(18), .operand_b_width(18))
6632 
    mult0 (.a(a), .b(b), .p(p));
6633 
endmodule
6634 40 unneback 
`endif
6635 18 unneback 
 
6636 40 unneback 
`ifdef MULT
6637 
`define MODULE mult
6638 18 unneback 
// unsigned multiplication
6639 40 unneback 
module `BASE`MODULE (a,b,p);
6640 
`undef MODULE
6641 18 unneback 
parameter operand_a_width = 18;
6642 
parameter operand_b_width = 18;
6643 
parameter result_hi = 35;
6644 
parameter result_lo = 0;
6645 
input [operand_a_width-1:0] a;
6646 
input [operand_b_width-1:0] b;
6647 
output [result_hi:result_hi] p;
6648 
 
6649 
wire [operand_a_width+operand_b_width-1:0] result;
6650 
 
6651 
    assign result = a * b;
6652 
    assign p = result[result_hi:result_lo];
6653 
 
6654 
endmodule
6655 40 unneback 
`endif
6656 18 unneback 
 
6657 40 unneback 
`ifdef SHIFT_UNIT_32
6658 
`define MODULE shift_unit_32
6659 18 unneback 
// shift unit
6660 
// supporting the following shift functions
6661 
//   SLL
6662 
//   SRL
6663 
//   SRA
6664 
`define SHIFT_UNIT_MULT # ( .operand_a_width(25), .operand_b_width(16), .result_hi(14), .result_lo(7))
6665 40 unneback 
module `BASE`MODULE( din, s, dout, opcode);
6666 
`undef MODULE
6667 18 unneback 
input [31:0] din; // data in operand
6668 
input [4:0] s; // shift operand
6669 
input [1:0] opcode;
6670 
output [31:0] dout;
6671 
 
6672 
parameter opcode_sll = 2'b00;
6673 
//parameter opcode_srl = 2'b01;
6674 
parameter opcode_sra = 2'b10;
6675 
//parameter opcode_ror = 2'b11;
6676 
 
6677 
wire sll, sra;
6678 
assign sll = opcode == opcode_sll;
6679 
assign sra = opcode == opcode_sra;
6680 
 
6681 
wire [15:1] s1;
6682 
wire [3:0] sign;
6683 
wire [7:0] tmp [0:3];
6684 
 
6685 
// first stage is multiplier based
6686 
// shift operand as fractional 8.7
6687 
assign s1[15] = sll & s[2:0]==3'd7;
6688 
assign s1[14] = sll & s[2:0]==3'd6;
6689 
assign s1[13] = sll & s[2:0]==3'd5;
6690 
assign s1[12] = sll & s[2:0]==3'd4;
6691 
assign s1[11] = sll & s[2:0]==3'd3;
6692 
assign s1[10] = sll & s[2:0]==3'd2;
6693 
assign s1[ 9] = sll & s[2:0]==3'd1;
6694 
assign s1[ 8] = s[2:0]==3'd0;
6695 
assign s1[ 7] = !sll & s[2:0]==3'd1;
6696 
assign s1[ 6] = !sll & s[2:0]==3'd2;
6697 
assign s1[ 5] = !sll & s[2:0]==3'd3;
6698 
assign s1[ 4] = !sll & s[2:0]==3'd4;
6699 
assign s1[ 3] = !sll & s[2:0]==3'd5;
6700 
assign s1[ 2] = !sll & s[2:0]==3'd6;
6701 
assign s1[ 1] = !sll & s[2:0]==3'd7;
6702 
 
6703 
assign sign[3] = din[31] & sra;
6704 
assign sign[2] = sign[3] & (&din[31:24]);
6705 
assign sign[1] = sign[2] & (&din[23:16]);
6706 
assign sign[0] = sign[1] & (&din[15:8]);
6707 40 unneback 
`define MODULE mults
6708 
`BASE`MODULE `SHIFT_UNIT_MULT mult_byte3 ( .a({sign[3], {8{sign[3]}},din[31:24], din[23:16]}), .b({1'b0,s1}), .p(tmp[3]));
6709 
`BASE`MODULE `SHIFT_UNIT_MULT mult_byte2 ( .a({sign[2], din[31:24]  ,din[23:16],  din[15:8]}), .b({1'b0,s1}), .p(tmp[2]));
6710 
`BASE`MODULE `SHIFT_UNIT_MULT mult_byte1 ( .a({sign[1], din[23:16]  ,din[15:8],   din[7:0]}), .b({1'b0,s1}), .p(tmp[1]));
6711 
`BASE`MODULE `SHIFT_UNIT_MULT mult_byte0 ( .a({sign[0], din[15:8]   ,din[7:0],    8'h00}),      .b({1'b0,s1}), .p(tmp[0]));
6712 
`undef MODULE
6713 18 unneback 
// second stage is multiplexer based
6714 
// shift on byte level
6715 
 
6716 
// mux byte 3
6717 
assign dout[31:24] = (s[4:3]==2'b00) ? tmp[3] :
6718 
                     (sll & s[4:3]==2'b01) ? tmp[2] :
6719 
                     (sll & s[4:3]==2'b10) ? tmp[1] :
6720 
                     (sll & s[4:3]==2'b11) ? tmp[0] :
6721 
                     {8{sign[3]}};
6722 
 
6723 
// mux byte 2
6724 
assign dout[23:16] = (s[4:3]==2'b00) ? tmp[2] :
6725 
                     (sll & s[4:3]==2'b01) ? tmp[1] :
6726 
                     (sll & s[4:3]==2'b10) ? tmp[0] :
6727 
                     (sll & s[4:3]==2'b11) ? {8{1'b0}} :
6728 
                     (s[4:3]==2'b01) ? tmp[3] :
6729 
                     {8{sign[3]}};
6730 
 
6731 
// mux byte 1
6732 
assign dout[15:8]  = (s[4:3]==2'b00) ? tmp[1] :
6733 
                     (sll & s[4:3]==2'b01) ? tmp[0] :
6734 
                     (sll & s[4:3]==2'b10) ? {8{1'b0}} :
6735 
                     (sll & s[4:3]==2'b11) ? {8{1'b0}} :
6736 
                     (s[4:3]==2'b01) ? tmp[2] :
6737 
                     (s[4:3]==2'b10) ? tmp[3] :
6738 
                     {8{sign[3]}};
6739 
 
6740 
// mux byte 0
6741 
assign dout[7:0]   = (s[4:3]==2'b00) ? tmp[0] :
6742 
                     (sll) ?  {8{1'b0}}:
6743 
                     (s[4:3]==2'b01) ? tmp[1] :
6744 
                     (s[4:3]==2'b10) ? tmp[2] :
6745 
                     tmp[3];
6746 
 
6747 
endmodule
6748 40 unneback 
`endif
6749 18 unneback 
 
6750 40 unneback 
`ifdef LOGIC_UNIT
6751 18 unneback 
// logic unit
6752 
// supporting the following logic functions
6753 
//    a and b
6754 
//    a or  b
6755 
//    a xor b
6756 
//    not b
6757 40 unneback 
`define MODULE logic_unit
6758 
module `BASE`MODULE( a, b, result, opcode);
6759 
`undef MODULE
6760 18 unneback 
parameter width = 32;
6761 
parameter opcode_and = 2'b00;
6762 
parameter opcode_or  = 2'b01;
6763 
parameter opcode_xor = 2'b10;
6764 
input [width-1:0] a,b;
6765 
output [width-1:0] result;
6766 
input [1:0] opcode;
6767 
 
6768 
assign result = (opcode==opcode_and) ? a & b :
6769 
                (opcode==opcode_or)  ? a | b :
6770 
                (opcode==opcode_xor) ? a ^ b :
6771 
                b;
6772 
 
6773 
endmodule
6774 48 unneback 
`endif
6775 18 unneback 
 
6776 48 unneback 
`ifdef ARITH_UNIT
6777 
`define MODULE arith_unit
6778 
module `BASE`MODULE ( a, b, c_in, add_sub, sign, result, c_out, z, ovfl);
6779 
`undef MODULE
6780 18 unneback 
parameter width = 32;
6781 
parameter opcode_add = 1'b0;
6782 
parameter opcode_sub = 1'b1;
6783 
input [width-1:0] a,b;
6784 
input c_in, add_sub, sign;
6785 
output [width-1:0] result;
6786 
output c_out, z, ovfl;
6787 
 
6788 
assign {c_out,result} = {(a[width-1] & sign),a} + ({a[width-1] & sign,b} ^ {(width+1){(add_sub==opcode_sub)}}) + {{(width-1){1'b0}},(c_in | (add_sub==opcode_sub))};
6789 
assign z = (result=={width{1'b0}});
6790 
assign ovfl = ( a[width-1] &  b[width-1] & ~result[width-1]) |
6791 
               (~a[width-1] & ~b[width-1] &  result[width-1]);
6792 
endmodule
6793 40 unneback 
`endif
6794 48 unneback 
 
6795 
`ifdef COUNT_UNIT
6796 
`define MODULE count_unit
6797 
module `BASE`MODULE (din, dout, opcode);
6798 
`undef MODULE
6799 
parameter width = 32;
6800 
input [width-1:0] din;
6801 
output [width-1:0] dout;
6802 
input opcode;
6803 
 
6804 
integer i;
6805 58 unneback 
wire [width/32+4:0] ff1, fl1;
6806 48 unneback 
 
6807 57 unneback 
/*
6808 48 unneback 
always @(din) begin
6809 
    ff1 = 0; i = 0;
6810 
    while (din[i] == 0 && i < width) begin // complex condition
6811 
        ff1 = ff1 + 1;
6812 
        i = i + 1;
6813 
    end
6814 
end
6815 
 
6816 
always @(din) begin
6817 
    fl1 = width; i = width-1;
6818 
    while (din[i] == 0 && i >= width) begin // complex condition
6819 
        fl1 = fl1 - 1;
6820 
        i = i - 1;
6821 
    end
6822 
end
6823 57 unneback 
*/
6824 48 unneback 
 
6825 
generate
6826 
if (width==32) begin
6827 57 unneback 
 
6828 
    assign ff1 = din[0] ? 6'd1 :
6829 
                 din[1] ? 6'd2 :
6830 
                 din[2] ? 6'd3 :
6831 
                 din[3] ? 6'd4 :
6832 
                 din[4] ? 6'd5 :
6833 
                 din[5] ? 6'd6 :
6834 
                 din[6] ? 6'd7 :
6835 
                 din[7] ? 6'd8 :
6836 
                 din[8] ? 6'd9 :
6837 
                 din[9] ? 6'd10 :
6838 
                 din[10] ? 6'd11 :
6839 
                 din[11] ? 6'd12 :
6840 
                 din[12] ? 6'd13 :
6841 
                 din[13] ? 6'd14 :
6842 
                 din[14] ? 6'd15 :
6843 
                 din[15] ? 6'd16 :
6844 
                 din[16] ? 6'd17 :
6845 
                 din[17] ? 6'd18 :
6846 
                 din[18] ? 6'd19 :
6847 
                 din[19] ? 6'd20 :
6848 
                 din[20] ? 6'd21 :
6849 
                 din[21] ? 6'd22 :
6850 
                 din[22] ? 6'd23 :
6851 
                 din[23] ? 6'd24 :
6852 
                 din[24] ? 6'd25 :
6853 
                 din[25] ? 6'd26 :
6854 
                 din[26] ? 6'd27 :
6855 
                 din[27] ? 6'd28 :
6856 
                 din[28] ? 6'd29 :
6857 
                 din[29] ? 6'd30 :
6858 
                 din[30] ? 6'd31 :
6859 
                 din[31] ? 6'd32 :
6860 
                 6'd0;
6861 
 
6862 
    assign fl1 = din[31] ? 6'd32 :
6863 
                 din[30] ? 6'd31 :
6864 
                 din[29] ? 6'd30 :
6865 
                 din[28] ? 6'd29 :
6866 
                 din[27] ? 6'd28 :
6867 
                 din[26] ? 6'd27 :
6868 
                 din[25] ? 6'd26 :
6869 
                 din[24] ? 6'd25 :
6870 
                 din[23] ? 6'd24 :
6871 
                 din[22] ? 6'd23 :
6872 
                 din[21] ? 6'd22 :
6873 
                 din[20] ? 6'd21 :
6874 
                 din[19] ? 6'd20 :
6875 
                 din[18] ? 6'd19 :
6876 
                 din[17] ? 6'd18 :
6877 
                 din[16] ? 6'd17 :
6878 
                 din[15] ? 6'd16 :
6879 
                 din[14] ? 6'd15 :
6880 
                 din[13] ? 6'd14 :
6881 
                 din[12] ? 6'd13 :
6882 
                 din[11] ? 6'd12 :
6883 
                 din[10] ? 6'd11 :
6884 
                 din[9] ? 6'd10 :
6885 
                 din[8] ? 6'd9 :
6886 
                 din[7] ? 6'd8 :
6887 
                 din[6] ? 6'd7 :
6888 
                 din[5] ? 6'd6 :
6889 
                 din[4] ? 6'd5 :
6890 
                 din[3] ? 6'd4 :
6891 
                 din[2] ? 6'd3 :
6892 
                 din[1] ? 6'd2 :
6893 
                 din[0] ? 6'd1 :
6894 
                 6'd0;
6895 
 
6896 
    assign dout = (!opcode) ? {{26{1'b0}}, ff1} : {{26{1'b0}}, fl1};
6897 48 unneback 
end
6898 
endgenerate
6899 57 unneback 
 
6900 48 unneback 
generate
6901 
if (width==64) begin
6902 57 unneback 
    assign ff1 = 7'd0;
6903 
    assign fl1 = 7'd0;
6904 
    assign dout = (!opcode) ? {{57{1'b0}}, ff1} : {{57{1'b0}}, fl1};
6905 48 unneback 
end
6906 
endgenerate
6907 
 
6908 
endmodule
6909 
`endif
6910 
 
6911 
`ifdef EXT_UNIT
6912 
`define MODULE ext_unit
6913 
module `BASE`MODULE ( a, b, F, result, opcode);
6914 
`undef MODULE
6915 
parameter width = 32;
6916 
input [width-1:0] a, b;
6917 
input F;
6918 
output reg [width-1:0] result;
6919 
input [2:0] opcode;
6920 
 
6921 
generate
6922 
if (width==32) begin
6923 
always @ (a or b or F or opcode)
6924 
begin
6925 
    case (opcode)
6926 
    3'b000: result = {{24{1'b0}},a[7:0]};
6927 
    3'b001: result = {{24{a[7]}},a[7:0]};
6928 
    3'b010: result = {{16{1'b0}},a[7:0]};
6929 
    3'b011: result = {{16{a[15]}},a[15:0]};
6930 
    3'b110: result = (F) ? a : b;
6931 
    default: result = {b[15:0],16'h0000};
6932 
    endcase
6933 
end
6934 
end
6935 
endgenerate
6936 
 
6937 
generate
6938 
if (width==64) begin
6939 
always @ (a or b or F or opcode)
6940 
begin
6941 
    case (opcode)
6942 
    3'b000: result = {{56{1'b0}},a[7:0]};
6943 
    3'b001: result = {{56{a[7]}},a[7:0]};
6944 
    3'b010: result = {{48{1'b0}},a[7:0]};
6945 
    3'b011: result = {{48{a[15]}},a[15:0]};
6946 57 unneback 
    3'b110: result = (F) ? a : b;
6947 48 unneback 
    default: result = {32'h00000000,b[15:0],16'h0000};
6948 
    endcase
6949 
end
6950 
end
6951 
endgenerate
6952 
endmodule
6953 
`endif

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