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[/] [openrisc/] [trunk/] [orpsocv2/] [rtl/] [verilog/] [or1200/] [or1200_du.v] - Blame information for rev 500

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1 350 julius 
//////////////////////////////////////////////////////////////////////
2 
////                                                              ////
3 
////  OR1200's Debug Unit                                         ////
4 
////                                                              ////
5 
////  This file is part of the OpenRISC 1200 project              ////
6 
////  http://www.opencores.org/project,or1k                       ////
7 
////                                                              ////
8 
////  Description                                                 ////
9 
////  Basic OR1200 debug unit.                                    ////
10 
////                                                              ////
11 
////  To Do:                                                      ////
12 
////   - make it smaller and faster                               ////
13 
////                                                              ////
14 
////  Author(s):                                                  ////
15 
////      - Damjan Lampret, lampret@opencores.org                 ////
16 
////                                                              ////
17 
//////////////////////////////////////////////////////////////////////
18 
////                                                              ////
19 
//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
20 
////                                                              ////
21 
//// This source file may be used and distributed without         ////
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//// restriction provided that this copyright statement is not    ////
23 
//// removed from the file and that any derivative work contains  ////
24 
//// the original copyright notice and the associated disclaimer. ////
25 
////                                                              ////
26 
//// This source file is free software; you can redistribute it   ////
27 
//// and/or modify it under the terms of the GNU Lesser General   ////
28 
//// Public License as published by the Free Software Foundation; ////
29 
//// either version 2.1 of the License, or (at your option) any   ////
30 
//// later version.                                               ////
31 
////                                                              ////
32 
//// This source is distributed in the hope that it will be       ////
33 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
34 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
35 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
36 
//// details.                                                     ////
37 
////                                                              ////
38 
//// You should have received a copy of the GNU Lesser General    ////
39 
//// Public License along with this source; if not, download it   ////
40 
//// from http://www.opencores.org/lgpl.shtml                     ////
41 
////                                                              ////
42 
//////////////////////////////////////////////////////////////////////
43 
//
44 
//
45 
// $Log: or1200_du.v,v $
46 
// Revision 2.0  2010/06/30 11:00:00  ORSoC
47 
// Minor update:
48 
// Bugs fixed.
49 
 
50 
// synopsys translate_off
51 
`include "timescale.v"
52 
// synopsys translate_on
53 
`include "or1200_defines.v"
54 
 
55 
//
56 
// Debug unit
57 
//
58 
 
59 
module or1200_du(
60 
        // RISC Internal Interface
61 
        clk, rst,
62 
        dcpu_cycstb_i, dcpu_we_i, dcpu_adr_i, dcpu_dat_lsu,
63 
        dcpu_dat_dc, icpu_cycstb_i,
64 
        ex_freeze, branch_op, ex_insn, id_pc,
65 
        spr_dat_npc, rf_dataw,
66 
        du_dsr, du_dmr1, du_stall, du_addr, du_dat_i, du_dat_o,
67 
        du_read, du_write, du_except_stop, du_hwbkpt,
68 
        spr_cs, spr_write, spr_addr, spr_dat_i, spr_dat_o,
69 
 
70 
        // External Debug Interface
71 
        dbg_stall_i, dbg_ewt_i, dbg_lss_o, dbg_is_o, dbg_wp_o, dbg_bp_o,
72 
        dbg_stb_i, dbg_we_i, dbg_adr_i, dbg_dat_i, dbg_dat_o, dbg_ack_o
73 
);
74 
 
75 
parameter dw = `OR1200_OPERAND_WIDTH;
76 
parameter aw = `OR1200_OPERAND_WIDTH;
77 
 
78 
//
79 
// I/O
80 
//
81 
 
82 
//
83 
// RISC Internal Interface
84 
//
85 
input                           clk;            // Clock
86 
input                           rst;            // Reset
87 
input                           dcpu_cycstb_i;  // LSU status
88 
input                           dcpu_we_i;      // LSU status
89 
input   [31:0]                   dcpu_adr_i;     // LSU addr
90 
input   [31:0]                   dcpu_dat_lsu;   // LSU store data
91 
input   [31:0]                   dcpu_dat_dc;    // LSU load data
92 
input   [`OR1200_FETCHOP_WIDTH-1:0]      icpu_cycstb_i;  // IFETCH unit status
93 
input                           ex_freeze;      // EX stage freeze
94 
input   [`OR1200_BRANCHOP_WIDTH-1:0]     branch_op;      // Branch op
95 
input   [dw-1:0]         ex_insn;        // EX insn
96 
input   [31:0]                   id_pc;          // insn fetch EA
97 
input   [31:0]                   spr_dat_npc;    // Next PC (for trace)
98 
input   [31:0]                   rf_dataw;       // ALU result (for trace)
99 
output  [`OR1200_DU_DSR_WIDTH-1:0]     du_dsr;           // DSR
100 
output  [24: 0]                  du_dmr1;
101 
output                          du_stall;       // Debug Unit Stall
102 
output  [aw-1:0]         du_addr;        // Debug Unit Address
103 
input   [dw-1:0]         du_dat_i;       // Debug Unit Data In
104 
output  [dw-1:0]         du_dat_o;       // Debug Unit Data Out
105 
output                          du_read;        // Debug Unit Read Enable
106 
output                          du_write;       // Debug Unit Write Enable
107 
input   [13:0]                   du_except_stop; // Exception masked by DSR
108 
output                          du_hwbkpt;      // Cause trap exception (HW Breakpoints)
109 
input                           spr_cs;         // SPR Chip Select
110 
input                           spr_write;      // SPR Read/Write
111 
input   [aw-1:0]         spr_addr;       // SPR Address
112 
input   [dw-1:0]         spr_dat_i;      // SPR Data Input
113 
output  [dw-1:0]         spr_dat_o;      // SPR Data Output
114 
 
115 
//
116 
// External Debug Interface
117 
//
118 
input                   dbg_stall_i;    // External Stall Input
119 
input                   dbg_ewt_i;      // External Watchpoint Trigger Input
120 
output  [3:0]            dbg_lss_o;      // External Load/Store Unit Status
121 
output  [1:0]            dbg_is_o;       // External Insn Fetch Status
122 
output  [10:0]           dbg_wp_o;       // Watchpoints Outputs
123 
output                  dbg_bp_o;       // Breakpoint Output
124 
input                   dbg_stb_i;      // External Address/Data Strobe
125 
input                   dbg_we_i;       // External Write Enable
126 
input   [aw-1:0] dbg_adr_i;      // External Address Input
127 
input   [dw-1:0] dbg_dat_i;      // External Data Input
128 
output  [dw-1:0] dbg_dat_o;      // External Data Output
129 
output                  dbg_ack_o;      // External Data Acknowledge (not WB compatible)
130 
reg     [dw-1:0] dbg_dat_o;      // External Data Output
131 
reg                     dbg_ack_o;      // External Data Acknowledge (not WB compatible)
132 
 
133 
 
134 
//
135 
// Some connections go directly from the CPU through DU to Debug I/F
136 
//
137 
`ifdef OR1200_DU_STATUS_UNIMPLEMENTED
138 
assign dbg_lss_o = 4'b0000;
139 
 
140 
reg     [1:0]                    dbg_is_o;
141 
//
142 
// Show insn activity (temp, must be removed)
143 
//
144 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
145 
        if (rst == `OR1200_RST_VALUE)
146 350 julius 
                dbg_is_o <=  2'b00;
147 
        else if (!ex_freeze & ~((ex_insn[31:26] == `OR1200_OR32_NOP) & ex_insn[16]))
148 
                dbg_is_o <=  ~dbg_is_o;
149 
`ifdef UNUSED
150 
assign dbg_is_o = 2'b00;
151 
`endif
152 
`else
153 
assign dbg_lss_o = dcpu_cycstb_i ? {dcpu_we_i, 3'b000} : 4'b0000;
154 
assign dbg_is_o = {1'b0, icpu_cycstb_i};
155 
`endif
156 
assign dbg_wp_o = 11'b000_0000_0000;
157 
 
158 
//
159 
// Some connections go directly from Debug I/F through DU to the CPU
160 
//
161 
assign du_stall = dbg_stall_i;
162 
assign du_addr = dbg_adr_i;
163 
assign du_dat_o = dbg_dat_i;
164 
assign du_read = dbg_stb_i && !dbg_we_i;
165 
assign du_write = dbg_stb_i && dbg_we_i;
166 
 
167 
reg                             dbg_ack;
168 
//
169 
// Generate acknowledge -- just delay stb signal
170 
//
171 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst) begin
172 
        if (rst == `OR1200_RST_VALUE) begin
173 350 julius 
                dbg_ack   <=  1'b0;
174 
                dbg_ack_o <=  1'b0;
175 
        end
176 
        else begin
177 
                dbg_ack   <=  dbg_stb_i;                // valid when du_dat_i
178 
                dbg_ack_o <=  dbg_ack & dbg_stb_i;      // valid when dbg_dat_o
179 
        end
180 
end
181 
 
182 
//
183 
// Register data output
184 
//
185 
always @(posedge clk)
186 
    dbg_dat_o <=  du_dat_i;
187 
 
188 
`ifdef OR1200_DU_IMPLEMENTED
189 
 
190 
//
191 
// Debug Mode Register 1
192 
//
193 
`ifdef OR1200_DU_DMR1
194 
reg     [24:0]                   dmr1;           // DMR1 implemented
195 
`else
196 
wire    [24:0]                   dmr1;           // DMR1 not implemented
197 
`endif
198 
assign du_dmr1 = dmr1;
199 
 
200 
//
201 
// Debug Mode Register 2
202 
//
203 
`ifdef OR1200_DU_DMR2
204 
reg     [23:0]                   dmr2;           // DMR2 implemented
205 
`else
206 
wire    [23:0]                   dmr2;           // DMR2 not implemented
207 
`endif
208 
 
209 
//
210 
// Debug Stop Register
211 
//
212 
`ifdef OR1200_DU_DSR
213 
reg     [`OR1200_DU_DSR_WIDTH-1:0]       dsr;            // DSR implemented
214 
`else
215 
wire    [`OR1200_DU_DSR_WIDTH-1:0]       dsr;            // DSR not implemented
216 
`endif
217 
 
218 
//
219 
// Debug Reason Register
220 
//
221 
`ifdef OR1200_DU_DRR
222 
reg     [13:0]                   drr;            // DRR implemented
223 
`else
224 
wire    [13:0]                   drr;            // DRR not implemented
225 
`endif
226 
 
227 
//
228 
// Debug Value Register N
229 
//
230 
`ifdef OR1200_DU_DVR0
231 
reg     [31:0]                   dvr0;
232 
`else
233 
wire    [31:0]                   dvr0;
234 
`endif
235 
 
236 
//
237 
// Debug Value Register N
238 
//
239 
`ifdef OR1200_DU_DVR1
240 
reg     [31:0]                   dvr1;
241 
`else
242 
wire    [31:0]                   dvr1;
243 
`endif
244 
 
245 
//
246 
// Debug Value Register N
247 
//
248 
`ifdef OR1200_DU_DVR2
249 
reg     [31:0]                   dvr2;
250 
`else
251 
wire    [31:0]                   dvr2;
252 
`endif
253 
 
254 
//
255 
// Debug Value Register N
256 
//
257 
`ifdef OR1200_DU_DVR3
258 
reg     [31:0]                   dvr3;
259 
`else
260 
wire    [31:0]                   dvr3;
261 
`endif
262 
 
263 
//
264 
// Debug Value Register N
265 
//
266 
`ifdef OR1200_DU_DVR4
267 
reg     [31:0]                   dvr4;
268 
`else
269 
wire    [31:0]                   dvr4;
270 
`endif
271 
 
272 
//
273 
// Debug Value Register N
274 
//
275 
`ifdef OR1200_DU_DVR5
276 
reg     [31:0]                   dvr5;
277 
`else
278 
wire    [31:0]                   dvr5;
279 
`endif
280 
 
281 
//
282 
// Debug Value Register N
283 
//
284 
`ifdef OR1200_DU_DVR6
285 
reg     [31:0]                   dvr6;
286 
`else
287 
wire    [31:0]                   dvr6;
288 
`endif
289 
 
290 
//
291 
// Debug Value Register N
292 
//
293 
`ifdef OR1200_DU_DVR7
294 
reg     [31:0]                   dvr7;
295 
`else
296 
wire    [31:0]                   dvr7;
297 
`endif
298 
 
299 
//
300 
// Debug Control Register N
301 
//
302 
`ifdef OR1200_DU_DCR0
303 
reg     [7:0]                    dcr0;
304 
`else
305 
wire    [7:0]                    dcr0;
306 
`endif
307 
 
308 
//
309 
// Debug Control Register N
310 
//
311 
`ifdef OR1200_DU_DCR1
312 
reg     [7:0]                    dcr1;
313 
`else
314 
wire    [7:0]                    dcr1;
315 
`endif
316 
 
317 
//
318 
// Debug Control Register N
319 
//
320 
`ifdef OR1200_DU_DCR2
321 
reg     [7:0]                    dcr2;
322 
`else
323 
wire    [7:0]                    dcr2;
324 
`endif
325 
 
326 
//
327 
// Debug Control Register N
328 
//
329 
`ifdef OR1200_DU_DCR3
330 
reg     [7:0]                    dcr3;
331 
`else
332 
wire    [7:0]                    dcr3;
333 
`endif
334 
 
335 
//
336 
// Debug Control Register N
337 
//
338 
`ifdef OR1200_DU_DCR4
339 
reg     [7:0]                    dcr4;
340 
`else
341 
wire    [7:0]                    dcr4;
342 
`endif
343 
 
344 
//
345 
// Debug Control Register N
346 
//
347 
`ifdef OR1200_DU_DCR5
348 
reg     [7:0]                    dcr5;
349 
`else
350 
wire    [7:0]                    dcr5;
351 
`endif
352 
 
353 
//
354 
// Debug Control Register N
355 
//
356 
`ifdef OR1200_DU_DCR6
357 
reg     [7:0]                    dcr6;
358 
`else
359 
wire    [7:0]                    dcr6;
360 
`endif
361 
 
362 
//
363 
// Debug Control Register N
364 
//
365 
`ifdef OR1200_DU_DCR7
366 
reg     [7:0]                    dcr7;
367 
`else
368 
wire    [7:0]                    dcr7;
369 
`endif
370 
 
371 
//
372 
// Debug Watchpoint Counter Register 0
373 
//
374 
`ifdef OR1200_DU_DWCR0
375 
reg     [31:0]                   dwcr0;
376 
`else
377 
wire    [31:0]                   dwcr0;
378 
`endif
379 
 
380 
//
381 
// Debug Watchpoint Counter Register 1
382 
//
383 
`ifdef OR1200_DU_DWCR1
384 
reg     [31:0]                   dwcr1;
385 
`else
386 
wire    [31:0]                   dwcr1;
387 
`endif
388 
 
389 
//
390 
// Internal wires
391 
//
392 
wire                            dmr1_sel;       // DMR1 select
393 
wire                            dmr2_sel;       // DMR2 select
394 
wire                            dsr_sel;        // DSR select
395 
wire                            drr_sel;        // DRR select
396 
wire                            dvr0_sel,
397 
                                dvr1_sel,
398 
                                dvr2_sel,
399 
                                dvr3_sel,
400 
                                dvr4_sel,
401 
                                dvr5_sel,
402 
                                dvr6_sel,
403 
                                dvr7_sel;       // DVR selects
404 
wire                            dcr0_sel,
405 
                                dcr1_sel,
406 
                                dcr2_sel,
407 
                                dcr3_sel,
408 
                                dcr4_sel,
409 
                                dcr5_sel,
410 
                                dcr6_sel,
411 
                                dcr7_sel;       // DCR selects
412 
wire                            dwcr0_sel,
413 
                                dwcr1_sel;      // DWCR selects
414 
reg                             dbg_bp_r;
415 
`ifdef OR1200_DU_HWBKPTS
416 
reg     [31:0]                   match_cond0_ct;
417 
reg     [31:0]                   match_cond1_ct;
418 
reg     [31:0]                   match_cond2_ct;
419 
reg     [31:0]                   match_cond3_ct;
420 
reg     [31:0]                   match_cond4_ct;
421 
reg     [31:0]                   match_cond5_ct;
422 
reg     [31:0]                   match_cond6_ct;
423 
reg     [31:0]                   match_cond7_ct;
424 
reg                             match_cond0_stb;
425 
reg                             match_cond1_stb;
426 
reg                             match_cond2_stb;
427 
reg                             match_cond3_stb;
428 
reg                             match_cond4_stb;
429 
reg                             match_cond5_stb;
430 
reg                             match_cond6_stb;
431 
reg                             match_cond7_stb;
432 
reg                             match0;
433 
reg                             match1;
434 
reg                             match2;
435 
reg                             match3;
436 
reg                             match4;
437 
reg                             match5;
438 
reg                             match6;
439 
reg                             match7;
440 
reg                             wpcntr0_match;
441 
reg                             wpcntr1_match;
442 
reg                             incr_wpcntr0;
443 
reg                             incr_wpcntr1;
444 
reg     [10:0]                   wp;
445 
`endif
446 
wire                            du_hwbkpt;
447 
reg                             du_hwbkpt_hold;
448 
`ifdef OR1200_DU_READREGS
449 
reg     [31:0]                   spr_dat_o;
450 
`endif
451 
reg     [13:0]                   except_stop;    // Exceptions that stop because of DSR
452 
`ifdef OR1200_DU_TB_IMPLEMENTED
453 
wire                            tb_enw;
454 
reg     [7:0]                    tb_wadr;
455 
reg [31:0]                       tb_timstmp;
456 
`endif
457 
wire    [31:0]                   tbia_dat_o;
458 
wire    [31:0]                   tbim_dat_o;
459 
wire    [31:0]                   tbar_dat_o;
460 
wire    [31:0]                   tbts_dat_o;
461 
 
462 
//
463 
// DU registers address decoder
464 
//
465 
`ifdef OR1200_DU_DMR1
466 
assign dmr1_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DMR1));
467 
`endif
468 
`ifdef OR1200_DU_DMR2
469 
assign dmr2_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DMR2));
470 
`endif
471 
`ifdef OR1200_DU_DSR
472 
assign dsr_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DSR));
473 
`endif
474 
`ifdef OR1200_DU_DRR
475 
assign drr_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DRR));
476 
`endif
477 
`ifdef OR1200_DU_DVR0
478 
assign dvr0_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR0));
479 
`endif
480 
`ifdef OR1200_DU_DVR1
481 
assign dvr1_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR1));
482 
`endif
483 
`ifdef OR1200_DU_DVR2
484 
assign dvr2_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR2));
485 
`endif
486 
`ifdef OR1200_DU_DVR3
487 
assign dvr3_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR3));
488 
`endif
489 
`ifdef OR1200_DU_DVR4
490 
assign dvr4_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR4));
491 
`endif
492 
`ifdef OR1200_DU_DVR5
493 
assign dvr5_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR5));
494 
`endif
495 
`ifdef OR1200_DU_DVR6
496 
assign dvr6_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR6));
497 
`endif
498 
`ifdef OR1200_DU_DVR7
499 
assign dvr7_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR7));
500 
`endif
501 
`ifdef OR1200_DU_DCR0
502 
assign dcr0_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR0));
503 
`endif
504 
`ifdef OR1200_DU_DCR1
505 
assign dcr1_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR1));
506 
`endif
507 
`ifdef OR1200_DU_DCR2
508 
assign dcr2_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR2));
509 
`endif
510 
`ifdef OR1200_DU_DCR3
511 
assign dcr3_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR3));
512 
`endif
513 
`ifdef OR1200_DU_DCR4
514 
assign dcr4_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR4));
515 
`endif
516 
`ifdef OR1200_DU_DCR5
517 
assign dcr5_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR5));
518 
`endif
519 
`ifdef OR1200_DU_DCR6
520 
assign dcr6_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR6));
521 
`endif
522 
`ifdef OR1200_DU_DCR7
523 
assign dcr7_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR7));
524 
`endif
525 
`ifdef OR1200_DU_DWCR0
526 
assign dwcr0_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DWCR0));
527 
`endif
528 
`ifdef OR1200_DU_DWCR1
529 
assign dwcr1_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DWCR1));
530 
`endif
531 
 
532 
//
533 
// Decode started exception
534 
//
535 
// du_except_stop comes from or1200_except
536 
//
537 
always @(du_except_stop) begin
538 
        except_stop = 14'b00_0000_0000_0000;
539 363 julius 
        casez (du_except_stop)
540 
                14'b1?_????_????_????:
541 350 julius 
                        except_stop[`OR1200_DU_DRR_TTE] = 1'b1;
542 363 julius 
                14'b01_????_????_????: begin
543 350 julius 
                        except_stop[`OR1200_DU_DRR_IE] = 1'b1;
544 
                end
545 363 julius 
                14'b00_1???_????_????: begin
546 350 julius 
                        except_stop[`OR1200_DU_DRR_IME] = 1'b1;
547 
                end
548 363 julius 
                14'b00_01??_????_????:
549 350 julius 
                        except_stop[`OR1200_DU_DRR_IPFE] = 1'b1;
550 363 julius 
                14'b00_001?_????_????: begin
551 350 julius 
                        except_stop[`OR1200_DU_DRR_BUSEE] = 1'b1;
552 
                end
553 363 julius 
                14'b00_0001_????_????:
554 350 julius 
                        except_stop[`OR1200_DU_DRR_IIE] = 1'b1;
555 363 julius 
                14'b00_0000_1???_????: begin
556 350 julius 
                        except_stop[`OR1200_DU_DRR_AE] = 1'b1;
557 
                end
558 363 julius 
                14'b00_0000_01??_????: begin
559 350 julius 
                        except_stop[`OR1200_DU_DRR_DME] = 1'b1;
560 
                end
561 363 julius 
                14'b00_0000_001?_????:
562 350 julius 
                        except_stop[`OR1200_DU_DRR_DPFE] = 1'b1;
563 363 julius 
                14'b00_0000_0001_????:
564 350 julius 
                        except_stop[`OR1200_DU_DRR_BUSEE] = 1'b1;
565 363 julius 
                14'b00_0000_0000_1???: begin
566 350 julius 
                        except_stop[`OR1200_DU_DRR_RE] = 1'b1;
567 
                end
568 363 julius 
                14'b00_0000_0000_01??: begin
569 350 julius 
                        except_stop[`OR1200_DU_DRR_TE] = 1'b1;
570 
                end
571 363 julius 
                14'b00_0000_0000_001?: begin
572 350 julius 
                        except_stop[`OR1200_DU_DRR_FPE] = 1'b1;
573 
                end
574 
                14'b00_0000_0000_0001:
575 
                        except_stop[`OR1200_DU_DRR_SCE] = 1'b1;
576 
                default:
577 
                        except_stop = 14'b00_0000_0000_0000;
578 
        endcase
579 
end
580 
 
581 
//
582 
// dbg_bp_o is registered
583 
//
584 
assign dbg_bp_o = dbg_bp_r;
585 
 
586 
//
587 
// Breakpoint activation register
588 
//
589 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
590 
        if (rst == `OR1200_RST_VALUE)
591 350 julius 
                dbg_bp_r <=  1'b0;
592 
        else if (!ex_freeze)
593 
                dbg_bp_r <=  |except_stop
594 
`ifdef OR1200_DU_DMR1_ST
595 
                        | ~((ex_insn[31:26] == `OR1200_OR32_NOP) & ex_insn[16]) & dmr1[`OR1200_DU_DMR1_ST]
596 
`endif
597 
`ifdef OR1200_DU_DMR1_BT
598 
                        | (branch_op != `OR1200_BRANCHOP_NOP) & (branch_op != `OR1200_BRANCHOP_RFE) & dmr1[`OR1200_DU_DMR1_BT]
599 
`endif
600 
                        ;
601 
        else
602 
                dbg_bp_r <=  |except_stop;
603 
 
604 
//
605 
// Write to DMR1
606 
//
607 
`ifdef OR1200_DU_DMR1
608 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
609 
        if (rst == `OR1200_RST_VALUE)
610 350 julius 
                dmr1 <= 25'h000_0000;
611 
        else if (dmr1_sel && spr_write)
612 
`ifdef OR1200_DU_HWBKPTS
613 
                dmr1 <=  spr_dat_i[24:0];
614 
`else
615 
                dmr1 <=  {1'b0, spr_dat_i[23:22], 22'h00_0000};
616 
`endif
617 
`else
618 
assign dmr1 = 25'h000_0000;
619 
`endif
620 
 
621 
//
622 
// Write to DMR2
623 
//
624 
`ifdef OR1200_DU_DMR2
625 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
626 
        if (rst == `OR1200_RST_VALUE)
627 350 julius 
                dmr2 <= 24'h00_0000;
628 
        else if (dmr2_sel && spr_write)
629 
                dmr2 <=  spr_dat_i[23:0];
630 
`else
631 
assign dmr2 = 24'h00_0000;
632 
`endif
633 
 
634 
//
635 
// Write to DSR
636 
//
637 
`ifdef OR1200_DU_DSR
638 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
639 
        if (rst == `OR1200_RST_VALUE)
640 350 julius 
                dsr <= {`OR1200_DU_DSR_WIDTH{1'b0}};
641 
        else if (dsr_sel && spr_write)
642 
                dsr <=  spr_dat_i[`OR1200_DU_DSR_WIDTH-1:0];
643 
`else
644 
assign dsr = {`OR1200_DU_DSR_WIDTH{1'b0}};
645 
`endif
646 
 
647 
//
648 
// Write to DRR
649 
//
650 
`ifdef OR1200_DU_DRR
651 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
652 
        if (rst == `OR1200_RST_VALUE)
653 350 julius 
                drr <= 14'b0;
654 
        else if (drr_sel && spr_write)
655 
                drr <=  spr_dat_i[13:0];
656 
        else
657 
                drr <=  drr | except_stop;
658 
`else
659 
assign drr = 14'b0;
660 
`endif
661 
 
662 
//
663 
// Write to DVR0
664 
//
665 
`ifdef OR1200_DU_DVR0
666 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
667 
        if (rst == `OR1200_RST_VALUE)
668 350 julius 
                dvr0 <= 32'h0000_0000;
669 
        else if (dvr0_sel && spr_write)
670 
                dvr0 <=  spr_dat_i[31:0];
671 
`else
672 
assign dvr0 = 32'h0000_0000;
673 
`endif
674 
 
675 
//
676 
// Write to DVR1
677 
//
678 
`ifdef OR1200_DU_DVR1
679 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
680 
        if (rst == `OR1200_RST_VALUE)
681 350 julius 
                dvr1 <= 32'h0000_0000;
682 
        else if (dvr1_sel && spr_write)
683 
                dvr1 <=  spr_dat_i[31:0];
684 
`else
685 
assign dvr1 = 32'h0000_0000;
686 
`endif
687 
 
688 
//
689 
// Write to DVR2
690 
//
691 
`ifdef OR1200_DU_DVR2
692 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
693 
        if (rst == `OR1200_RST_VALUE)
694 350 julius 
                dvr2 <= 32'h0000_0000;
695 
        else if (dvr2_sel && spr_write)
696 
                dvr2 <=  spr_dat_i[31:0];
697 
`else
698 
assign dvr2 = 32'h0000_0000;
699 
`endif
700 
 
701 
//
702 
// Write to DVR3
703 
//
704 
`ifdef OR1200_DU_DVR3
705 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
706 
        if (rst == `OR1200_RST_VALUE)
707 350 julius 
                dvr3 <= 32'h0000_0000;
708 
        else if (dvr3_sel && spr_write)
709 
                dvr3 <=  spr_dat_i[31:0];
710 
`else
711 
assign dvr3 = 32'h0000_0000;
712 
`endif
713 
 
714 
//
715 
// Write to DVR4
716 
//
717 
`ifdef OR1200_DU_DVR4
718 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
719 
        if (rst == `OR1200_RST_VALUE)
720 350 julius 
                dvr4 <= 32'h0000_0000;
721 
        else if (dvr4_sel && spr_write)
722 
                dvr4 <=  spr_dat_i[31:0];
723 
`else
724 
assign dvr4 = 32'h0000_0000;
725 
`endif
726 
 
727 
//
728 
// Write to DVR5
729 
//
730 
`ifdef OR1200_DU_DVR5
731 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
732 
        if (rst == `OR1200_RST_VALUE)
733 350 julius 
                dvr5 <= 32'h0000_0000;
734 
        else if (dvr5_sel && spr_write)
735 
                dvr5 <=  spr_dat_i[31:0];
736 
`else
737 
assign dvr5 = 32'h0000_0000;
738 
`endif
739 
 
740 
//
741 
// Write to DVR6
742 
//
743 
`ifdef OR1200_DU_DVR6
744 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
745 
        if (rst == `OR1200_RST_VALUE)
746 350 julius 
                dvr6 <= 32'h0000_0000;
747 
        else if (dvr6_sel && spr_write)
748 
                dvr6 <=  spr_dat_i[31:0];
749 
`else
750 
assign dvr6 = 32'h0000_0000;
751 
`endif
752 
 
753 
//
754 
// Write to DVR7
755 
//
756 
`ifdef OR1200_DU_DVR7
757 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
758 
        if (rst == `OR1200_RST_VALUE)
759 350 julius 
                dvr7 <= 32'h0000_0000;
760 
        else if (dvr7_sel && spr_write)
761 
                dvr7 <=  spr_dat_i[31:0];
762 
`else
763 
assign dvr7 = 32'h0000_0000;
764 
`endif
765 
 
766 
//
767 
// Write to DCR0
768 
//
769 
`ifdef OR1200_DU_DCR0
770 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
771 
        if (rst == `OR1200_RST_VALUE)
772 350 julius 
                dcr0 <= 8'h00;
773 
        else if (dcr0_sel && spr_write)
774 
                dcr0 <=  spr_dat_i[7:0];
775 
`else
776 
assign dcr0 = 8'h00;
777 
`endif
778 
 
779 
//
780 
// Write to DCR1
781 
//
782 
`ifdef OR1200_DU_DCR1
783 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
784 
        if (rst == `OR1200_RST_VALUE)
785 350 julius 
                dcr1 <= 8'h00;
786 
        else if (dcr1_sel && spr_write)
787 
                dcr1 <=  spr_dat_i[7:0];
788 
`else
789 
assign dcr1 = 8'h00;
790 
`endif
791 
 
792 
//
793 
// Write to DCR2
794 
//
795 
`ifdef OR1200_DU_DCR2
796 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
797 
        if (rst == `OR1200_RST_VALUE)
798 350 julius 
                dcr2 <= 8'h00;
799 
        else if (dcr2_sel && spr_write)
800 
                dcr2 <=  spr_dat_i[7:0];
801 
`else
802 
assign dcr2 = 8'h00;
803 
`endif
804 
 
805 
//
806 
// Write to DCR3
807 
//
808 
`ifdef OR1200_DU_DCR3
809 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
810 
        if (rst == `OR1200_RST_VALUE)
811 350 julius 
                dcr3 <= 8'h00;
812 
        else if (dcr3_sel && spr_write)
813 
                dcr3 <=  spr_dat_i[7:0];
814 
`else
815 
assign dcr3 = 8'h00;
816 
`endif
817 
 
818 
//
819 
// Write to DCR4
820 
//
821 
`ifdef OR1200_DU_DCR4
822 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
823 
        if (rst == `OR1200_RST_VALUE)
824 350 julius 
                dcr4 <= 8'h00;
825 
        else if (dcr4_sel && spr_write)
826 
                dcr4 <=  spr_dat_i[7:0];
827 
`else
828 
assign dcr4 = 8'h00;
829 
`endif
830 
 
831 
//
832 
// Write to DCR5
833 
//
834 
`ifdef OR1200_DU_DCR5
835 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
836 
        if (rst == `OR1200_RST_VALUE)
837 350 julius 
                dcr5 <= 8'h00;
838 
        else if (dcr5_sel && spr_write)
839 
                dcr5 <=  spr_dat_i[7:0];
840 
`else
841 
assign dcr5 = 8'h00;
842 
`endif
843 
 
844 
//
845 
// Write to DCR6
846 
//
847 
`ifdef OR1200_DU_DCR6
848 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
849 
        if (rst == `OR1200_RST_VALUE)
850 350 julius 
                dcr6 <= 8'h00;
851 
        else if (dcr6_sel && spr_write)
852 
                dcr6 <=  spr_dat_i[7:0];
853 
`else
854 
assign dcr6 = 8'h00;
855 
`endif
856 
 
857 
//
858 
// Write to DCR7
859 
//
860 
`ifdef OR1200_DU_DCR7
861 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
862 
        if (rst == `OR1200_RST_VALUE)
863 350 julius 
                dcr7 <= 8'h00;
864 
        else if (dcr7_sel && spr_write)
865 
                dcr7 <=  spr_dat_i[7:0];
866 
`else
867 
assign dcr7 = 8'h00;
868 
`endif
869 
 
870 
//
871 
// Write to DWCR0
872 
//
873 
`ifdef OR1200_DU_DWCR0
874 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
875 
        if (rst == `OR1200_RST_VALUE)
876 350 julius 
                dwcr0 <= 32'h0000_0000;
877 
        else if (dwcr0_sel && spr_write)
878 
                dwcr0 <=  spr_dat_i[31:0];
879 
        else if (incr_wpcntr0)
880 
                dwcr0[`OR1200_DU_DWCR_COUNT] <=  dwcr0[`OR1200_DU_DWCR_COUNT] + 16'h0001;
881 
`else
882 
assign dwcr0 = 32'h0000_0000;
883 
`endif
884 
 
885 
//
886 
// Write to DWCR1
887 
//
888 
`ifdef OR1200_DU_DWCR1
889 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
890 
        if (rst == `OR1200_RST_VALUE)
891 350 julius 
                dwcr1 <= 32'h0000_0000;
892 
        else if (dwcr1_sel && spr_write)
893 
                dwcr1 <=  spr_dat_i[31:0];
894 
        else if (incr_wpcntr1)
895 
                dwcr1[`OR1200_DU_DWCR_COUNT] <=  dwcr1[`OR1200_DU_DWCR_COUNT] + 16'h0001;
896 
`else
897 
assign dwcr1 = 32'h0000_0000;
898 
`endif
899 
 
900 
//
901 
// Read DU registers
902 
//
903 
`ifdef OR1200_DU_READREGS
904 
always @(spr_addr or dsr or drr or dmr1 or dmr2
905 
        or dvr0 or dvr1 or dvr2 or dvr3 or dvr4
906 
        or dvr5 or dvr6 or dvr7
907 
        or dcr0 or dcr1 or dcr2 or dcr3 or dcr4
908 
        or dcr5 or dcr6 or dcr7
909 
        or dwcr0 or dwcr1
910 
`ifdef OR1200_DU_TB_IMPLEMENTED
911 
        or tb_wadr or tbia_dat_o or tbim_dat_o
912 
        or tbar_dat_o or tbts_dat_o
913 
`endif
914 
        )
915 363 julius 
        casez (spr_addr[`OR1200_DUOFS_BITS]) // synopsys parallel_case
916 350 julius 
`ifdef OR1200_DU_DVR0
917 
                `OR1200_DU_DVR0:
918 
                        spr_dat_o = dvr0;
919 
`endif
920 
`ifdef OR1200_DU_DVR1
921 
                `OR1200_DU_DVR1:
922 
                        spr_dat_o = dvr1;
923 
`endif
924 
`ifdef OR1200_DU_DVR2
925 
                `OR1200_DU_DVR2:
926 
                        spr_dat_o = dvr2;
927 
`endif
928 
`ifdef OR1200_DU_DVR3
929 
                `OR1200_DU_DVR3:
930 
                        spr_dat_o = dvr3;
931 
`endif
932 
`ifdef OR1200_DU_DVR4
933 
                `OR1200_DU_DVR4:
934 
                        spr_dat_o = dvr4;
935 
`endif
936 
`ifdef OR1200_DU_DVR5
937 
                `OR1200_DU_DVR5:
938 
                        spr_dat_o = dvr5;
939 
`endif
940 
`ifdef OR1200_DU_DVR6
941 
                `OR1200_DU_DVR6:
942 
                        spr_dat_o = dvr6;
943 
`endif
944 
`ifdef OR1200_DU_DVR7
945 
                `OR1200_DU_DVR7:
946 
                        spr_dat_o = dvr7;
947 
`endif
948 
`ifdef OR1200_DU_DCR0
949 
                `OR1200_DU_DCR0:
950 
                        spr_dat_o = {24'h00_0000, dcr0};
951 
`endif
952 
`ifdef OR1200_DU_DCR1
953 
                `OR1200_DU_DCR1:
954 
                        spr_dat_o = {24'h00_0000, dcr1};
955 
`endif
956 
`ifdef OR1200_DU_DCR2
957 
                `OR1200_DU_DCR2:
958 
                        spr_dat_o = {24'h00_0000, dcr2};
959 
`endif
960 
`ifdef OR1200_DU_DCR3
961 
                `OR1200_DU_DCR3:
962 
                        spr_dat_o = {24'h00_0000, dcr3};
963 
`endif
964 
`ifdef OR1200_DU_DCR4
965 
                `OR1200_DU_DCR4:
966 
                        spr_dat_o = {24'h00_0000, dcr4};
967 
`endif
968 
`ifdef OR1200_DU_DCR5
969 
                `OR1200_DU_DCR5:
970 
                        spr_dat_o = {24'h00_0000, dcr5};
971 
`endif
972 
`ifdef OR1200_DU_DCR6
973 
                `OR1200_DU_DCR6:
974 
                        spr_dat_o = {24'h00_0000, dcr6};
975 
`endif
976 
`ifdef OR1200_DU_DCR7
977 
                `OR1200_DU_DCR7:
978 
                        spr_dat_o = {24'h00_0000, dcr7};
979 
`endif
980 
`ifdef OR1200_DU_DMR1
981 
                `OR1200_DU_DMR1:
982 
                        spr_dat_o = {7'h00, dmr1};
983 
`endif
984 
`ifdef OR1200_DU_DMR2
985 
                `OR1200_DU_DMR2:
986 
                        spr_dat_o = {8'h00, dmr2};
987 
`endif
988 
`ifdef OR1200_DU_DWCR0
989 
                `OR1200_DU_DWCR0:
990 
                        spr_dat_o = dwcr0;
991 
`endif
992 
`ifdef OR1200_DU_DWCR1
993 
                `OR1200_DU_DWCR1:
994 
                        spr_dat_o = dwcr1;
995 
`endif
996 
`ifdef OR1200_DU_DSR
997 
                `OR1200_DU_DSR:
998 
                        spr_dat_o = {18'b0, dsr};
999 
`endif
1000 
`ifdef OR1200_DU_DRR
1001 
                `OR1200_DU_DRR:
1002 
                        spr_dat_o = {18'b0, drr};
1003 
`endif
1004 
`ifdef OR1200_DU_TB_IMPLEMENTED
1005 
                `OR1200_DU_TBADR:
1006 
                        spr_dat_o = {24'h000000, tb_wadr};
1007 
                `OR1200_DU_TBIA:
1008 
                        spr_dat_o = tbia_dat_o;
1009 
                `OR1200_DU_TBIM:
1010 
                        spr_dat_o = tbim_dat_o;
1011 
                `OR1200_DU_TBAR:
1012 
                        spr_dat_o = tbar_dat_o;
1013 
                `OR1200_DU_TBTS:
1014 
                        spr_dat_o = tbts_dat_o;
1015 
`endif
1016 
                default:
1017 
                        spr_dat_o = 32'h0000_0000;
1018 
        endcase
1019 
`endif
1020 
 
1021 
//
1022 
// DSR alias
1023 
//
1024 
assign du_dsr = dsr;
1025 
 
1026 
`ifdef OR1200_DU_HWBKPTS
1027 
 
1028 
//
1029 
// Compare To What (Match Condition 0)
1030 
//
1031 
always @(dcr0 or id_pc or dcpu_adr_i or dcpu_dat_dc
1032 
        or dcpu_dat_lsu or dcpu_we_i)
1033 
        case (dcr0[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1034 
                3'b001: match_cond0_ct = id_pc;         // insn fetch EA
1035 
                3'b010: match_cond0_ct = dcpu_adr_i;    // load EA
1036 
                3'b011: match_cond0_ct = dcpu_adr_i;    // store EA
1037 
                3'b100: match_cond0_ct = dcpu_dat_dc;   // load data
1038 
                3'b101: match_cond0_ct = dcpu_dat_lsu;  // store data
1039 
                3'b110: match_cond0_ct = dcpu_adr_i;    // load/store EA
1040 
                default:match_cond0_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1041 
        endcase
1042 
 
1043 
//
1044 
// When To Compare (Match Condition 0)
1045 
//
1046 
always @(dcr0 or dcpu_cycstb_i)
1047 
        case (dcr0[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1048 
                3'b000: match_cond0_stb = 1'b0;         //comparison disabled
1049 
                3'b001: match_cond0_stb = 1'b1;         // insn fetch EA
1050 
                default:match_cond0_stb = dcpu_cycstb_i; // any load/store
1051 
        endcase
1052 
 
1053 
//
1054 
// Match Condition 0
1055 
//
1056 
always @(match_cond0_stb or dcr0 or dvr0 or match_cond0_ct)
1057 
        casex ({match_cond0_stb, dcr0[`OR1200_DU_DCR_CC]})
1058 
                4'b0_xxx,
1059 
                4'b1_000,
1060 
                4'b1_111: match0 = 1'b0;
1061 
                4'b1_001: match0 =
1062 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} ==
1063 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1064 
                4'b1_010: match0 =
1065 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} <
1066 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1067 
                4'b1_011: match0 =
1068 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} <=
1069 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1070 
                4'b1_100: match0 =
1071 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} >
1072 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1073 
                4'b1_101: match0 =
1074 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} >=
1075 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1076 
                4'b1_110: match0 =
1077 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} !=
1078 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1079 
        endcase
1080 
 
1081 
//
1082 
// Watchpoint 0
1083 
//
1084 
always @(dmr1 or match0)
1085 
        case (dmr1[`OR1200_DU_DMR1_CW0])
1086 
                2'b00: wp[0] = match0;
1087 
                2'b01: wp[0] = match0;
1088 
                2'b10: wp[0] = match0;
1089 
                2'b11: wp[0] = 1'b0;
1090 
        endcase
1091 
 
1092 
//
1093 
// Compare To What (Match Condition 1)
1094 
//
1095 
always @(dcr1 or id_pc or dcpu_adr_i or dcpu_dat_dc
1096 
        or dcpu_dat_lsu or dcpu_we_i)
1097 
        case (dcr1[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1098 
                3'b001: match_cond1_ct = id_pc;         // insn fetch EA
1099 
                3'b010: match_cond1_ct = dcpu_adr_i;    // load EA
1100 
                3'b011: match_cond1_ct = dcpu_adr_i;    // store EA
1101 
                3'b100: match_cond1_ct = dcpu_dat_dc;   // load data
1102 
                3'b101: match_cond1_ct = dcpu_dat_lsu;  // store data
1103 
                3'b110: match_cond1_ct = dcpu_adr_i;    // load/store EA
1104 
                default:match_cond1_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1105 
        endcase
1106 
 
1107 
//
1108 
// When To Compare (Match Condition 1)
1109 
//
1110 
always @(dcr1 or dcpu_cycstb_i)
1111 
        case (dcr1[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1112 
                3'b000: match_cond1_stb = 1'b0;         //comparison disabled
1113 
                3'b001: match_cond1_stb = 1'b1;         // insn fetch EA
1114 
                default:match_cond1_stb = dcpu_cycstb_i; // any load/store
1115 
        endcase
1116 
 
1117 
//
1118 
// Match Condition 1
1119 
//
1120 
always @(match_cond1_stb or dcr1 or dvr1 or match_cond1_ct)
1121 
        casex ({match_cond1_stb, dcr1[`OR1200_DU_DCR_CC]})
1122 
                4'b0_xxx,
1123 
                4'b1_000,
1124 
                4'b1_111: match1 = 1'b0;
1125 
                4'b1_001: match1 =
1126 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} ==
1127 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1128 
                4'b1_010: match1 =
1129 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} <
1130 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1131 
                4'b1_011: match1 =
1132 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} <=
1133 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1134 
                4'b1_100: match1 =
1135 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} >
1136 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1137 
                4'b1_101: match1 =
1138 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} >=
1139 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1140 
                4'b1_110: match1 =
1141 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} !=
1142 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1143 
        endcase
1144 
 
1145 
//
1146 
// Watchpoint 1
1147 
//
1148 
always @(dmr1 or match1 or wp)
1149 
        case (dmr1[`OR1200_DU_DMR1_CW1])
1150 
                2'b00: wp[1] = match1;
1151 
                2'b01: wp[1] = match1 & wp[0];
1152 
                2'b10: wp[1] = match1 | wp[0];
1153 
                2'b11: wp[1] = 1'b0;
1154 
        endcase
1155 
 
1156 
//
1157 
// Compare To What (Match Condition 2)
1158 
//
1159 
always @(dcr2 or id_pc or dcpu_adr_i or dcpu_dat_dc
1160 
        or dcpu_dat_lsu or dcpu_we_i)
1161 
        case (dcr2[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1162 
                3'b001: match_cond2_ct = id_pc;         // insn fetch EA
1163 
                3'b010: match_cond2_ct = dcpu_adr_i;    // load EA
1164 
                3'b011: match_cond2_ct = dcpu_adr_i;    // store EA
1165 
                3'b100: match_cond2_ct = dcpu_dat_dc;   // load data
1166 
                3'b101: match_cond2_ct = dcpu_dat_lsu;  // store data
1167 
                3'b110: match_cond2_ct = dcpu_adr_i;    // load/store EA
1168 
                default:match_cond2_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1169 
        endcase
1170 
 
1171 
//
1172 
// When To Compare (Match Condition 2)
1173 
//
1174 
always @(dcr2 or dcpu_cycstb_i)
1175 
        case (dcr2[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1176 
                3'b000: match_cond2_stb = 1'b0;         //comparison disabled
1177 
                3'b001: match_cond2_stb = 1'b1;         // insn fetch EA
1178 
                default:match_cond2_stb = dcpu_cycstb_i; // any load/store
1179 
        endcase
1180 
 
1181 
//
1182 
// Match Condition 2
1183 
//
1184 
always @(match_cond2_stb or dcr2 or dvr2 or match_cond2_ct)
1185 
        casex ({match_cond2_stb, dcr2[`OR1200_DU_DCR_CC]})
1186 
                4'b0_xxx,
1187 
                4'b1_000,
1188 
                4'b1_111: match2 = 1'b0;
1189 
                4'b1_001: match2 =
1190 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} ==
1191 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1192 
                4'b1_010: match2 =
1193 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} <
1194 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1195 
                4'b1_011: match2 =
1196 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} <=
1197 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1198 
                4'b1_100: match2 =
1199 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} >
1200 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1201 
                4'b1_101: match2 =
1202 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} >=
1203 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1204 
                4'b1_110: match2 =
1205 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} !=
1206 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1207 
        endcase
1208 
 
1209 
//
1210 
// Watchpoint 2
1211 
//
1212 
always @(dmr1 or match2 or wp)
1213 
        case (dmr1[`OR1200_DU_DMR1_CW2])
1214 
                2'b00: wp[2] = match2;
1215 
                2'b01: wp[2] = match2 & wp[1];
1216 
                2'b10: wp[2] = match2 | wp[1];
1217 
                2'b11: wp[2] = 1'b0;
1218 
        endcase
1219 
 
1220 
//
1221 
// Compare To What (Match Condition 3)
1222 
//
1223 
always @(dcr3 or id_pc or dcpu_adr_i or dcpu_dat_dc
1224 
        or dcpu_dat_lsu or dcpu_we_i)
1225 
        case (dcr3[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1226 
                3'b001: match_cond3_ct = id_pc;         // insn fetch EA
1227 
                3'b010: match_cond3_ct = dcpu_adr_i;    // load EA
1228 
                3'b011: match_cond3_ct = dcpu_adr_i;    // store EA
1229 
                3'b100: match_cond3_ct = dcpu_dat_dc;   // load data
1230 
                3'b101: match_cond3_ct = dcpu_dat_lsu;  // store data
1231 
                3'b110: match_cond3_ct = dcpu_adr_i;    // load/store EA
1232 
                default:match_cond3_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1233 
        endcase
1234 
 
1235 
//
1236 
// When To Compare (Match Condition 3)
1237 
//
1238 
always @(dcr3 or dcpu_cycstb_i)
1239 
        case (dcr3[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1240 
                3'b000: match_cond3_stb = 1'b0;         //comparison disabled
1241 
                3'b001: match_cond3_stb = 1'b1;         // insn fetch EA
1242 
                default:match_cond3_stb = dcpu_cycstb_i; // any load/store
1243 
        endcase
1244 
 
1245 
//
1246 
// Match Condition 3
1247 
//
1248 
always @(match_cond3_stb or dcr3 or dvr3 or match_cond3_ct)
1249 
        casex ({match_cond3_stb, dcr3[`OR1200_DU_DCR_CC]})
1250 
                4'b0_xxx,
1251 
                4'b1_000,
1252 
                4'b1_111: match3 = 1'b0;
1253 
                4'b1_001: match3 =
1254 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} ==
1255 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1256 
                4'b1_010: match3 =
1257 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} <
1258 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1259 
                4'b1_011: match3 =
1260 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} <=
1261 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1262 
                4'b1_100: match3 =
1263 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} >
1264 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1265 
                4'b1_101: match3 =
1266 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} >=
1267 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1268 
                4'b1_110: match3 =
1269 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} !=
1270 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1271 
        endcase
1272 
 
1273 
//
1274 
// Watchpoint 3
1275 
//
1276 
always @(dmr1 or match3 or wp)
1277 
        case (dmr1[`OR1200_DU_DMR1_CW3])
1278 
                2'b00: wp[3] = match3;
1279 
                2'b01: wp[3] = match3 & wp[2];
1280 
                2'b10: wp[3] = match3 | wp[2];
1281 
                2'b11: wp[3] = 1'b0;
1282 
        endcase
1283 
 
1284 
//
1285 
// Compare To What (Match Condition 4)
1286 
//
1287 
always @(dcr4 or id_pc or dcpu_adr_i or dcpu_dat_dc
1288 
        or dcpu_dat_lsu or dcpu_we_i)
1289 
        case (dcr4[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1290 
                3'b001: match_cond4_ct = id_pc;         // insn fetch EA
1291 
                3'b010: match_cond4_ct = dcpu_adr_i;    // load EA
1292 
                3'b011: match_cond4_ct = dcpu_adr_i;    // store EA
1293 
                3'b100: match_cond4_ct = dcpu_dat_dc;   // load data
1294 
                3'b101: match_cond4_ct = dcpu_dat_lsu;  // store data
1295 
                3'b110: match_cond4_ct = dcpu_adr_i;    // load/store EA
1296 
                default:match_cond4_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1297 
        endcase
1298 
 
1299 
//
1300 
// When To Compare (Match Condition 4)
1301 
//
1302 
always @(dcr4 or dcpu_cycstb_i)
1303 
        case (dcr4[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1304 
                3'b000: match_cond4_stb = 1'b0;         //comparison disabled
1305 
                3'b001: match_cond4_stb = 1'b1;         // insn fetch EA
1306 
                default:match_cond4_stb = dcpu_cycstb_i; // any load/store
1307 
        endcase
1308 
 
1309 
//
1310 
// Match Condition 4
1311 
//
1312 
always @(match_cond4_stb or dcr4 or dvr4 or match_cond4_ct)
1313 
        casex ({match_cond4_stb, dcr4[`OR1200_DU_DCR_CC]})
1314 
                4'b0_xxx,
1315 
                4'b1_000,
1316 
                4'b1_111: match4 = 1'b0;
1317 
                4'b1_001: match4 =
1318 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} ==
1319 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1320 
                4'b1_010: match4 =
1321 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} <
1322 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1323 
                4'b1_011: match4 =
1324 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} <=
1325 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1326 
                4'b1_100: match4 =
1327 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} >
1328 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1329 
                4'b1_101: match4 =
1330 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} >=
1331 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1332 
                4'b1_110: match4 =
1333 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} !=
1334 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1335 
        endcase
1336 
 
1337 
//
1338 
// Watchpoint 4
1339 
//
1340 
always @(dmr1 or match4 or wp)
1341 
        case (dmr1[`OR1200_DU_DMR1_CW4])
1342 
                2'b00: wp[4] = match4;
1343 
                2'b01: wp[4] = match4 & wp[3];
1344 
                2'b10: wp[4] = match4 | wp[3];
1345 
                2'b11: wp[4] = 1'b0;
1346 
        endcase
1347 
 
1348 
//
1349 
// Compare To What (Match Condition 5)
1350 
//
1351 
always @(dcr5 or id_pc or dcpu_adr_i or dcpu_dat_dc
1352 
        or dcpu_dat_lsu or dcpu_we_i)
1353 
        case (dcr5[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1354 
                3'b001: match_cond5_ct = id_pc;         // insn fetch EA
1355 
                3'b010: match_cond5_ct = dcpu_adr_i;    // load EA
1356 
                3'b011: match_cond5_ct = dcpu_adr_i;    // store EA
1357 
                3'b100: match_cond5_ct = dcpu_dat_dc;   // load data
1358 
                3'b101: match_cond5_ct = dcpu_dat_lsu;  // store data
1359 
                3'b110: match_cond5_ct = dcpu_adr_i;    // load/store EA
1360 
                default:match_cond5_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1361 
        endcase
1362 
 
1363 
//
1364 
// When To Compare (Match Condition 5)
1365 
//
1366 
always @(dcr5 or dcpu_cycstb_i)
1367 
        case (dcr5[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1368 
                3'b000: match_cond5_stb = 1'b0;         //comparison disabled
1369 
                3'b001: match_cond5_stb = 1'b1;         // insn fetch EA
1370 
                default:match_cond5_stb = dcpu_cycstb_i; // any load/store
1371 
        endcase
1372 
 
1373 
//
1374 
// Match Condition 5
1375 
//
1376 
always @(match_cond5_stb or dcr5 or dvr5 or match_cond5_ct)
1377 
        casex ({match_cond5_stb, dcr5[`OR1200_DU_DCR_CC]})
1378 
                4'b0_xxx,
1379 
                4'b1_000,
1380 
                4'b1_111: match5 = 1'b0;
1381 
                4'b1_001: match5 =
1382 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} ==
1383 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1384 
                4'b1_010: match5 =
1385 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} <
1386 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1387 
                4'b1_011: match5 =
1388 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} <=
1389 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1390 
                4'b1_100: match5 =
1391 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} >
1392 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1393 
                4'b1_101: match5 =
1394 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} >=
1395 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1396 
                4'b1_110: match5 =
1397 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} !=
1398 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1399 
        endcase
1400 
 
1401 
//
1402 
// Watchpoint 5
1403 
//
1404 
always @(dmr1 or match5 or wp)
1405 
        case (dmr1[`OR1200_DU_DMR1_CW5])
1406 
                2'b00: wp[5] = match5;
1407 
                2'b01: wp[5] = match5 & wp[4];
1408 
                2'b10: wp[5] = match5 | wp[4];
1409 
                2'b11: wp[5] = 1'b0;
1410 
        endcase
1411 
 
1412 
//
1413 
// Compare To What (Match Condition 6)
1414 
//
1415 
always @(dcr6 or id_pc or dcpu_adr_i or dcpu_dat_dc
1416 
        or dcpu_dat_lsu or dcpu_we_i)
1417 
        case (dcr6[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1418 
                3'b001: match_cond6_ct = id_pc;         // insn fetch EA
1419 
                3'b010: match_cond6_ct = dcpu_adr_i;    // load EA
1420 
                3'b011: match_cond6_ct = dcpu_adr_i;    // store EA
1421 
                3'b100: match_cond6_ct = dcpu_dat_dc;   // load data
1422 
                3'b101: match_cond6_ct = dcpu_dat_lsu;  // store data
1423 
                3'b110: match_cond6_ct = dcpu_adr_i;    // load/store EA
1424 
                default:match_cond6_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1425 
        endcase
1426 
 
1427 
//
1428 
// When To Compare (Match Condition 6)
1429 
//
1430 
always @(dcr6 or dcpu_cycstb_i)
1431 
        case (dcr6[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1432 
                3'b000: match_cond6_stb = 1'b0;         //comparison disabled
1433 
                3'b001: match_cond6_stb = 1'b1;         // insn fetch EA
1434 
                default:match_cond6_stb = dcpu_cycstb_i; // any load/store
1435 
        endcase
1436 
 
1437 
//
1438 
// Match Condition 6
1439 
//
1440 
always @(match_cond6_stb or dcr6 or dvr6 or match_cond6_ct)
1441 
        casex ({match_cond6_stb, dcr6[`OR1200_DU_DCR_CC]})
1442 
                4'b0_xxx,
1443 
                4'b1_000,
1444 
                4'b1_111: match6 = 1'b0;
1445 
                4'b1_001: match6 =
1446 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} ==
1447 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1448 
                4'b1_010: match6 =
1449 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} <
1450 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1451 
                4'b1_011: match6 =
1452 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} <=
1453 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1454 
                4'b1_100: match6 =
1455 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} >
1456 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1457 
                4'b1_101: match6 =
1458 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} >=
1459 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1460 
                4'b1_110: match6 =
1461 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} !=
1462 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1463 
        endcase
1464 
 
1465 
//
1466 
// Watchpoint 6
1467 
//
1468 
always @(dmr1 or match6 or wp)
1469 
        case (dmr1[`OR1200_DU_DMR1_CW6])
1470 
                2'b00: wp[6] = match6;
1471 
                2'b01: wp[6] = match6 & wp[5];
1472 
                2'b10: wp[6] = match6 | wp[5];
1473 
                2'b11: wp[6] = 1'b0;
1474 
        endcase
1475 
 
1476 
//
1477 
// Compare To What (Match Condition 7)
1478 
//
1479 
always @(dcr7 or id_pc or dcpu_adr_i or dcpu_dat_dc
1480 
        or dcpu_dat_lsu or dcpu_we_i)
1481 
        case (dcr7[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1482 
                3'b001: match_cond7_ct = id_pc;         // insn fetch EA
1483 
                3'b010: match_cond7_ct = dcpu_adr_i;    // load EA
1484 
                3'b011: match_cond7_ct = dcpu_adr_i;    // store EA
1485 
                3'b100: match_cond7_ct = dcpu_dat_dc;   // load data
1486 
                3'b101: match_cond7_ct = dcpu_dat_lsu;  // store data
1487 
                3'b110: match_cond7_ct = dcpu_adr_i;    // load/store EA
1488 
                default:match_cond7_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1489 
        endcase
1490 
 
1491 
//
1492 
// When To Compare (Match Condition 7)
1493 
//
1494 
always @(dcr7 or dcpu_cycstb_i)
1495 
        case (dcr7[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1496 
                3'b000: match_cond7_stb = 1'b0;         //comparison disabled
1497 
                3'b001: match_cond7_stb = 1'b1;         // insn fetch EA
1498 
                default:match_cond7_stb = dcpu_cycstb_i; // any load/store
1499 
        endcase
1500 
 
1501 
//
1502 
// Match Condition 7
1503 
//
1504 
always @(match_cond7_stb or dcr7 or dvr7 or match_cond7_ct)
1505 
        casex ({match_cond7_stb, dcr7[`OR1200_DU_DCR_CC]})
1506 
                4'b0_xxx,
1507 
                4'b1_000,
1508 
                4'b1_111: match7 = 1'b0;
1509 
                4'b1_001: match7 =
1510 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} ==
1511 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1512 
                4'b1_010: match7 =
1513 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} <
1514 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1515 
                4'b1_011: match7 =
1516 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} <=
1517 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1518 
                4'b1_100: match7 =
1519 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} >
1520 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1521 
                4'b1_101: match7 =
1522 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} >=
1523 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1524 
                4'b1_110: match7 =
1525 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} !=
1526 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1527 
        endcase
1528 
 
1529 
//
1530 
// Watchpoint 7
1531 
//
1532 
always @(dmr1 or match7 or wp)
1533 
        case (dmr1[`OR1200_DU_DMR1_CW7])
1534 
                2'b00: wp[7] = match7;
1535 
                2'b01: wp[7] = match7 & wp[6];
1536 
                2'b10: wp[7] = match7 | wp[6];
1537 
                2'b11: wp[7] = 1'b0;
1538 
        endcase
1539 
 
1540 
//
1541 
// Increment Watchpoint Counter 0
1542 
//
1543 
always @(wp or dmr2)
1544 
        if (dmr2[`OR1200_DU_DMR2_WCE0])
1545 
                incr_wpcntr0 = |(wp & ~dmr2[`OR1200_DU_DMR2_AWTC]);
1546 
        else
1547 
                incr_wpcntr0 = 1'b0;
1548 
 
1549 
//
1550 
// Match Condition Watchpoint Counter 0
1551 
//
1552 
always @(dwcr0)
1553 
        if (dwcr0[`OR1200_DU_DWCR_MATCH] == dwcr0[`OR1200_DU_DWCR_COUNT])
1554 
                wpcntr0_match = 1'b1;
1555 
        else
1556 
                wpcntr0_match = 1'b0;
1557 
 
1558 
 
1559 
//
1560 
// Watchpoint 8
1561 
//
1562 
always @(dmr1 or wpcntr0_match or wp)
1563 
        case (dmr1[`OR1200_DU_DMR1_CW8])
1564 
                2'b00: wp[8] = wpcntr0_match;
1565 
                2'b01: wp[8] = wpcntr0_match & wp[7];
1566 
                2'b10: wp[8] = wpcntr0_match | wp[7];
1567 
                2'b11: wp[8] = 1'b0;
1568 
        endcase
1569 
 
1570 
 
1571 
//
1572 
// Increment Watchpoint Counter 1
1573 
//
1574 
always @(wp or dmr2)
1575 
        if (dmr2[`OR1200_DU_DMR2_WCE1])
1576 
                incr_wpcntr1 = |(wp & dmr2[`OR1200_DU_DMR2_AWTC]);
1577 
        else
1578 
                incr_wpcntr1 = 1'b0;
1579 
 
1580 
//
1581 
// Match Condition Watchpoint Counter 1
1582 
//
1583 
always @(dwcr1)
1584 
        if (dwcr1[`OR1200_DU_DWCR_MATCH] == dwcr1[`OR1200_DU_DWCR_COUNT])
1585 
                wpcntr1_match = 1'b1;
1586 
        else
1587 
                wpcntr1_match = 1'b0;
1588 
 
1589 
//
1590 
// Watchpoint 9
1591 
//
1592 
always @(dmr1 or wpcntr1_match or wp)
1593 
        case (dmr1[`OR1200_DU_DMR1_CW9])
1594 
                2'b00: wp[9] = wpcntr1_match;
1595 
                2'b01: wp[9] = wpcntr1_match & wp[8];
1596 
                2'b10: wp[9] = wpcntr1_match | wp[8];
1597 
                2'b11: wp[9] = 1'b0;
1598 
        endcase
1599 
 
1600 
//
1601 
// Watchpoint 10
1602 
//
1603 
always @(dmr1 or dbg_ewt_i or wp)
1604 
        case (dmr1[`OR1200_DU_DMR1_CW10])
1605 
                2'b00: wp[10] = dbg_ewt_i;
1606 
                2'b01: wp[10] = dbg_ewt_i & wp[9];
1607 
                2'b10: wp[10] = dbg_ewt_i | wp[9];
1608 
                2'b11: wp[10] = 1'b0;
1609 
        endcase
1610 
 
1611 
`endif
1612 
 
1613 
//
1614 
// Watchpoints can cause trap exception
1615 
//
1616 
`ifdef OR1200_DU_HWBKPTS
1617 
assign du_hwbkpt = |(wp & dmr2[`OR1200_DU_DMR2_WGB]) | du_hwbkpt_hold | (dbg_bp_r & ~dsr[`OR1200_DU_DSR_TE]);
1618 
`else
1619 
assign du_hwbkpt = 1'b0;
1620 
`endif
1621 
 
1622 
// Hold du_hwbkpt if ex_freeze is active in order to cause trap exception
1623 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
1624 
        if (rst == `OR1200_RST_VALUE)
1625 350 julius 
                du_hwbkpt_hold <=  1'b0;
1626 
        else if (du_hwbkpt & ex_freeze)
1627 
                du_hwbkpt_hold <=  1'b1;
1628 
        else if (!ex_freeze)
1629 
                du_hwbkpt_hold <=  1'b0;
1630 
 
1631 
`ifdef OR1200_DU_TB_IMPLEMENTED
1632 
//
1633 
// Simple trace buffer
1634 
// (right now hardcoded for Xilinx Virtex FPGAs)
1635 
//
1636 
// Stores last 256 instruction addresses, instruction
1637 
// machine words and ALU results
1638 
//
1639 
 
1640 
//
1641 
// Trace buffer write enable
1642 
//
1643 
assign tb_enw = ~ex_freeze & ~((ex_insn[31:26] == `OR1200_OR32_NOP) & ex_insn[16]);
1644 
 
1645 
//
1646 
// Trace buffer write address pointer
1647 
//
1648 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
1649 
        if (rst == `OR1200_RST_VALUE)
1650 350 julius 
                tb_wadr <=  8'h00;
1651 
        else if (tb_enw)
1652 
                tb_wadr <=  tb_wadr + 8'd1;
1653 
 
1654 
//
1655 
// Free running counter (time stamp)
1656 
//
1657 358 julius 
always @(posedge clk or `OR1200_RST_EVENT rst)
1658 
        if (rst == `OR1200_RST_VALUE)
1659 350 julius 
                tb_timstmp <=  32'h00000000;
1660 
        else if (!dbg_bp_r)
1661 
                tb_timstmp <=  tb_timstmp + 32'd1;
1662 
 
1663 
//
1664 
// Trace buffer RAMs
1665 
//
1666 
 
1667 
or1200_dpram_256x32 tbia_ram(
1668 
        .clk_a(clk),
1669 
        .rst_a(1'b0),
1670 
        .addr_a(spr_addr[7:0]),
1671 
        .ce_a(1'b1),
1672 
        .oe_a(1'b1),
1673 
        .do_a(tbia_dat_o),
1674 
 
1675 
        .clk_b(clk),
1676 
        .rst_b(1'b0),
1677 
        .addr_b(tb_wadr),
1678 
        .di_b(spr_dat_npc),
1679 
        .ce_b(1'b1),
1680 
        .we_b(tb_enw)
1681 
 
1682 
);
1683 
 
1684 
or1200_dpram_256x32 tbim_ram(
1685 
        .clk_a(clk),
1686 
        .rst_a(1'b0),
1687 
        .addr_a(spr_addr[7:0]),
1688 
        .ce_a(1'b1),
1689 
        .oe_a(1'b1),
1690 
        .do_a(tbim_dat_o),
1691 
 
1692 
        .clk_b(clk),
1693 
        .rst_b(1'b0),
1694 
        .addr_b(tb_wadr),
1695 
        .di_b(ex_insn),
1696 
        .ce_b(1'b1),
1697 
        .we_b(tb_enw)
1698 
);
1699 
 
1700 
or1200_dpram_256x32 tbar_ram(
1701 
        .clk_a(clk),
1702 
        .rst_a(1'b0),
1703 
        .addr_a(spr_addr[7:0]),
1704 
        .ce_a(1'b1),
1705 
        .oe_a(1'b1),
1706 
        .do_a(tbar_dat_o),
1707 
 
1708 
        .clk_b(clk),
1709 
        .rst_b(1'b0),
1710 
        .addr_b(tb_wadr),
1711 
        .di_b(rf_dataw),
1712 
        .ce_b(1'b1),
1713 
        .we_b(tb_enw)
1714 
);
1715 
 
1716 
or1200_dpram_256x32 tbts_ram(
1717 
        .clk_a(clk),
1718 
        .rst_a(1'b0),
1719 
        .addr_a(spr_addr[7:0]),
1720 
        .ce_a(1'b1),
1721 
        .oe_a(1'b1),
1722 
        .do_a(tbts_dat_o),
1723 
 
1724 
        .clk_b(clk),
1725 
        .rst_b(1'b0),
1726 
        .addr_b(tb_wadr),
1727 
        .di_b(tb_timstmp),
1728 
        .ce_b(1'b1),
1729 
        .we_b(tb_enw)
1730 
);
1731 
 
1732 
`else
1733 
 
1734 
assign tbia_dat_o = 32'h0000_0000;
1735 
assign tbim_dat_o = 32'h0000_0000;
1736 
assign tbar_dat_o = 32'h0000_0000;
1737 
assign tbts_dat_o = 32'h0000_0000;
1738 
 
1739 
`endif  // OR1200_DU_TB_IMPLEMENTED
1740 
 
1741 
`else   // OR1200_DU_IMPLEMENTED
1742 
 
1743 
//
1744 
// When DU is not implemented, drive all outputs as would when DU is disabled
1745 
//
1746 
assign dbg_bp_o = 1'b0;
1747 
assign du_dsr = {`OR1200_DU_DSR_WIDTH{1'b0}};
1748 
assign du_dmr1 = {25{1'b0}};
1749 
assign du_hwbkpt = 1'b0;
1750 
 
1751 
//
1752 
// Read DU registers
1753 
//
1754 
`ifdef OR1200_DU_READREGS
1755 
assign spr_dat_o = 32'h0000_0000;
1756 
`ifdef OR1200_DU_UNUSED_ZERO
1757 
`endif
1758 
`endif
1759 
 
1760 
`endif
1761 
 
1762 
endmodule

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