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1 10 unneback 
//////////////////////////////////////////////////////////////////////
2 
////                                                              ////
3 
////  OR1200's Debug Unit                                         ////
4 
////                                                              ////
5 
////  This file is part of the OpenRISC 1200 project              ////
6 
////  http://www.opencores.org/cores/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         ////
22 
//// 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 
// CVS Revision History
45 
//
46 141 marcus.erl 
// $Log: or1200_du.v,v $
47 
// Revision 2.0  2010/06/30 11:00:00  ORSoC
48 
// Minor update:
49 
// Bugs fixed.
50 
//
51 
// Revision 1.12  2005/10/19 11:37:56  jcastillo
52 
// Added support for RAMB16 Xilinx4/Spartan3 primitives
53 
//
54 10 unneback 
// Revision 1.11  2005/01/07 09:35:08  andreje
55 
// du_hwbkpt disabled when debug unit not implemented
56 
//
57 
// Revision 1.10  2004/04/05 08:29:57  lampret
58 
// Merged branch_qmem into main tree.
59 
//
60 
// Revision 1.9.4.4  2004/02/11 01:40:11  lampret
61 
// preliminary HW breakpoints support in debug unit (by default disabled). To enable define OR1200_DU_HWBKPTS.
62 
//
63 
// Revision 1.9.4.3  2004/01/18 10:08:00  simons
64 
// Error fixed.
65 
//
66 
// Revision 1.9.4.2  2004/01/17 21:14:14  simons
67 
// Errors fixed.
68 
//
69 
// Revision 1.9.4.1  2004/01/15 06:46:38  markom
70 
// interface to debug changed; no more opselect; stb-ack protocol
71 
//
72 
// Revision 1.9  2003/01/22 03:23:47  lampret
73 
// Updated sensitivity list for trace buffer [only relevant for Xilinx FPGAs]
74 
//
75 
// Revision 1.8  2002/09/08 19:31:52  lampret
76 
// Fixed a typo, reported by Taylor Su.
77 
//
78 
// Revision 1.7  2002/07/14 22:17:17  lampret
79 
// Added simple trace buffer [only for Xilinx Virtex target]. Fixed instruction fetch abort when new exception is recognized.
80 
//
81 
// Revision 1.6  2002/03/14 00:30:24  lampret
82 
// Added alternative for critical path in DU.
83 
//
84 
// Revision 1.5  2002/02/11 04:33:17  lampret
85 
// Speed optimizations (removed duplicate _cyc_ and _stb_). Fixed D/IMMU cache-inhibit attr.
86 
//
87 
// Revision 1.4  2002/01/28 01:16:00  lampret
88 
// Changed 'void' nop-ops instead of insn[0] to use insn[16]. Debug unit stalls the tick timer. Prepared new flag generation for add and and insns. Blocked DC/IC while they are turned off. Fixed I/D MMU SPRs layout except WAYs. TODO: smart IC invalidate, l.j 2 and TLB ways.
89 
//
90 
// Revision 1.3  2002/01/18 07:56:00  lampret
91 
// No more low/high priority interrupts (PICPR removed). Added tick timer exception. Added exception prefix (SR[EPH]). Fixed single-step bug whenreading NPC.
92 
//
93 
// Revision 1.2  2002/01/14 06:18:22  lampret
94 
// Fixed mem2reg bug in FAST implementation. Updated debug unit to work with new genpc/if.
95 
//
96 
// Revision 1.1  2002/01/03 08:16:15  lampret
97 
// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
98 
//
99 
// Revision 1.12  2001/11/30 18:58:00  simons
100 
// Trap insn couses break after exits ex_insn.
101 
//
102 
// Revision 1.11  2001/11/23 08:38:51  lampret
103 
// Changed DSR/DRR behavior and exception detection.
104 
//
105 
// Revision 1.10  2001/11/20 21:25:44  lampret
106 
// Fixed dbg_is_o assignment width.
107 
//
108 
// Revision 1.9  2001/11/20 18:46:14  simons
109 
// Break point bug fixed
110 
//
111 
// Revision 1.8  2001/11/18 08:36:28  lampret
112 
// For GDB changed single stepping and disabled trap exception.
113 
//
114 
// Revision 1.7  2001/10/21 18:09:53  lampret
115 
// Fixed sensitivity list.
116 
//
117 
// Revision 1.6  2001/10/14 13:12:09  lampret
118 
// MP3 version.
119 
//
120 
//
121 
 
122 
// synopsys translate_off
123 
`include "timescale.v"
124 
// synopsys translate_on
125 
`include "or1200_defines.v"
126 
 
127 
//
128 
// Debug unit
129 
//
130 
 
131 
module or1200_du(
132 
        // RISC Internal Interface
133 
        clk, rst,
134 
        dcpu_cycstb_i, dcpu_we_i, dcpu_adr_i, dcpu_dat_lsu,
135 
        dcpu_dat_dc, icpu_cycstb_i,
136 
        ex_freeze, branch_op, ex_insn, id_pc,
137 
        spr_dat_npc, rf_dataw,
138 141 marcus.erl 
        du_dsr, du_dmr1, du_stall, du_addr, du_dat_i, du_dat_o,
139 
        du_read, du_write, du_except_stop, du_hwbkpt,
140 10 unneback 
        spr_cs, spr_write, spr_addr, spr_dat_i, spr_dat_o,
141 
 
142 
        // External Debug Interface
143 
        dbg_stall_i, dbg_ewt_i, dbg_lss_o, dbg_is_o, dbg_wp_o, dbg_bp_o,
144 
        dbg_stb_i, dbg_we_i, dbg_adr_i, dbg_dat_i, dbg_dat_o, dbg_ack_o
145 
);
146 
 
147 
parameter dw = `OR1200_OPERAND_WIDTH;
148 
parameter aw = `OR1200_OPERAND_WIDTH;
149 
 
150 
//
151 
// I/O
152 
//
153 
 
154 
//
155 
// RISC Internal Interface
156 
//
157 
input                           clk;            // Clock
158 
input                           rst;            // Reset
159 
input                           dcpu_cycstb_i;  // LSU status
160 
input                           dcpu_we_i;      // LSU status
161 
input   [31:0]                   dcpu_adr_i;     // LSU addr
162 
input   [31:0]                   dcpu_dat_lsu;   // LSU store data
163 
input   [31:0]                   dcpu_dat_dc;    // LSU load data
164 
input   [`OR1200_FETCHOP_WIDTH-1:0]      icpu_cycstb_i;  // IFETCH unit status
165 
input                           ex_freeze;      // EX stage freeze
166 
input   [`OR1200_BRANCHOP_WIDTH-1:0]     branch_op;      // Branch op
167 
input   [dw-1:0]         ex_insn;        // EX insn
168 
input   [31:0]                   id_pc;          // insn fetch EA
169 
input   [31:0]                   spr_dat_npc;    // Next PC (for trace)
170 
input   [31:0]                   rf_dataw;       // ALU result (for trace)
171 
output  [`OR1200_DU_DSR_WIDTH-1:0]     du_dsr;           // DSR
172 141 marcus.erl 
output  [24: 0]                  du_dmr1;
173 10 unneback 
output                          du_stall;       // Debug Unit Stall
174 
output  [aw-1:0]         du_addr;        // Debug Unit Address
175 
input   [dw-1:0]         du_dat_i;       // Debug Unit Data In
176 
output  [dw-1:0]         du_dat_o;       // Debug Unit Data Out
177 
output                          du_read;        // Debug Unit Read Enable
178 
output                          du_write;       // Debug Unit Write Enable
179 141 marcus.erl 
input   [12:0]                   du_except_stop; // Exception masked by DSR
180 10 unneback 
output                          du_hwbkpt;      // Cause trap exception (HW Breakpoints)
181 
input                           spr_cs;         // SPR Chip Select
182 
input                           spr_write;      // SPR Read/Write
183 
input   [aw-1:0]         spr_addr;       // SPR Address
184 
input   [dw-1:0]         spr_dat_i;      // SPR Data Input
185 
output  [dw-1:0]         spr_dat_o;      // SPR Data Output
186 
 
187 
//
188 
// External Debug Interface
189 
//
190 
input                   dbg_stall_i;    // External Stall Input
191 
input                   dbg_ewt_i;      // External Watchpoint Trigger Input
192 
output  [3:0]            dbg_lss_o;      // External Load/Store Unit Status
193 
output  [1:0]            dbg_is_o;       // External Insn Fetch Status
194 
output  [10:0]           dbg_wp_o;       // Watchpoints Outputs
195 
output                  dbg_bp_o;       // Breakpoint Output
196 
input                   dbg_stb_i;      // External Address/Data Strobe
197 
input                   dbg_we_i;       // External Write Enable
198 
input   [aw-1:0] dbg_adr_i;      // External Address Input
199 
input   [dw-1:0] dbg_dat_i;      // External Data Input
200 
output  [dw-1:0] dbg_dat_o;      // External Data Output
201 
output                  dbg_ack_o;      // External Data Acknowledge (not WB compatible)
202 141 marcus.erl 
reg     [dw-1:0] dbg_dat_o;      // External Data Output
203 
reg                     dbg_ack_o;      // External Data Acknowledge (not WB compatible)
204 10 unneback 
 
205 
 
206 
//
207 
// Some connections go directly from the CPU through DU to Debug I/F
208 
//
209 
`ifdef OR1200_DU_STATUS_UNIMPLEMENTED
210 
assign dbg_lss_o = 4'b0000;
211 
 
212 
reg     [1:0]                    dbg_is_o;
213 
//
214 
// Show insn activity (temp, must be removed)
215 
//
216 
always @(posedge clk or posedge rst)
217 
        if (rst)
218 
                dbg_is_o <= #1 2'b00;
219 141 marcus.erl 
        else if (!ex_freeze & ~((ex_insn[31:26] == `OR1200_OR32_NOP) & ex_insn[16]))
220 10 unneback 
                dbg_is_o <= #1 ~dbg_is_o;
221 
`ifdef UNUSED
222 
assign dbg_is_o = 2'b00;
223 
`endif
224 
`else
225 
assign dbg_lss_o = dcpu_cycstb_i ? {dcpu_we_i, 3'b000} : 4'b0000;
226 
assign dbg_is_o = {1'b0, icpu_cycstb_i};
227 
`endif
228 
assign dbg_wp_o = 11'b000_0000_0000;
229 
 
230 
//
231 
// Some connections go directly from Debug I/F through DU to the CPU
232 
//
233 
assign du_stall = dbg_stall_i;
234 
assign du_addr = dbg_adr_i;
235 
assign du_dat_o = dbg_dat_i;
236 
assign du_read = dbg_stb_i && !dbg_we_i;
237 
assign du_write = dbg_stb_i && dbg_we_i;
238 
 
239 141 marcus.erl 
reg                             dbg_ack;
240 10 unneback 
//
241 
// Generate acknowledge -- just delay stb signal
242 
//
243 141 marcus.erl 
always @(posedge clk or posedge rst) begin
244 
        if (rst) begin
245 
                dbg_ack   <= #1 1'b0;
246 10 unneback 
                dbg_ack_o <= #1 1'b0;
247 141 marcus.erl 
        end
248 
        else begin
249 
                dbg_ack   <= #1 dbg_stb_i;              // valid when du_dat_i
250 
                dbg_ack_o <= #1 dbg_ack & dbg_stb_i;    // valid when dbg_dat_o
251 
        end
252 
end
253 10 unneback 
 
254 141 marcus.erl 
//
255 
// Register data output
256 
//
257 
always @(posedge clk)
258 
    dbg_dat_o <= #1 du_dat_i;
259 
 
260 10 unneback 
`ifdef OR1200_DU_IMPLEMENTED
261 
 
262 
//
263 
// Debug Mode Register 1
264 
//
265 
`ifdef OR1200_DU_DMR1
266 
reg     [24:0]                   dmr1;           // DMR1 implemented
267 
`else
268 
wire    [24:0]                   dmr1;           // DMR1 not implemented
269 
`endif
270 141 marcus.erl 
assign du_dmr1 = dmr1;
271 10 unneback 
 
272 
//
273 
// Debug Mode Register 2
274 
//
275 
`ifdef OR1200_DU_DMR2
276 
reg     [23:0]                   dmr2;           // DMR2 implemented
277 
`else
278 
wire    [23:0]                   dmr2;           // DMR2 not implemented
279 
`endif
280 
 
281 
//
282 
// Debug Stop Register
283 
//
284 
`ifdef OR1200_DU_DSR
285 
reg     [`OR1200_DU_DSR_WIDTH-1:0]       dsr;            // DSR implemented
286 
`else
287 
wire    [`OR1200_DU_DSR_WIDTH-1:0]       dsr;            // DSR not implemented
288 
`endif
289 
 
290 
//
291 
// Debug Reason Register
292 
//
293 
`ifdef OR1200_DU_DRR
294 
reg     [13:0]                   drr;            // DRR implemented
295 
`else
296 
wire    [13:0]                   drr;            // DRR not implemented
297 
`endif
298 
 
299 
//
300 
// Debug Value Register N
301 
//
302 
`ifdef OR1200_DU_DVR0
303 
reg     [31:0]                   dvr0;
304 
`else
305 
wire    [31:0]                   dvr0;
306 
`endif
307 
 
308 
//
309 
// Debug Value Register N
310 
//
311 
`ifdef OR1200_DU_DVR1
312 
reg     [31:0]                   dvr1;
313 
`else
314 
wire    [31:0]                   dvr1;
315 
`endif
316 
 
317 
//
318 
// Debug Value Register N
319 
//
320 
`ifdef OR1200_DU_DVR2
321 
reg     [31:0]                   dvr2;
322 
`else
323 
wire    [31:0]                   dvr2;
324 
`endif
325 
 
326 
//
327 
// Debug Value Register N
328 
//
329 
`ifdef OR1200_DU_DVR3
330 
reg     [31:0]                   dvr3;
331 
`else
332 
wire    [31:0]                   dvr3;
333 
`endif
334 
 
335 
//
336 
// Debug Value Register N
337 
//
338 
`ifdef OR1200_DU_DVR4
339 
reg     [31:0]                   dvr4;
340 
`else
341 
wire    [31:0]                   dvr4;
342 
`endif
343 
 
344 
//
345 
// Debug Value Register N
346 
//
347 
`ifdef OR1200_DU_DVR5
348 
reg     [31:0]                   dvr5;
349 
`else
350 
wire    [31:0]                   dvr5;
351 
`endif
352 
 
353 
//
354 
// Debug Value Register N
355 
//
356 
`ifdef OR1200_DU_DVR6
357 
reg     [31:0]                   dvr6;
358 
`else
359 
wire    [31:0]                   dvr6;
360 
`endif
361 
 
362 
//
363 
// Debug Value Register N
364 
//
365 
`ifdef OR1200_DU_DVR7
366 
reg     [31:0]                   dvr7;
367 
`else
368 
wire    [31:0]                   dvr7;
369 
`endif
370 
 
371 
//
372 
// Debug Control Register N
373 
//
374 
`ifdef OR1200_DU_DCR0
375 
reg     [7:0]                    dcr0;
376 
`else
377 
wire    [7:0]                    dcr0;
378 
`endif
379 
 
380 
//
381 
// Debug Control Register N
382 
//
383 
`ifdef OR1200_DU_DCR1
384 
reg     [7:0]                    dcr1;
385 
`else
386 
wire    [7:0]                    dcr1;
387 
`endif
388 
 
389 
//
390 
// Debug Control Register N
391 
//
392 
`ifdef OR1200_DU_DCR2
393 
reg     [7:0]                    dcr2;
394 
`else
395 
wire    [7:0]                    dcr2;
396 
`endif
397 
 
398 
//
399 
// Debug Control Register N
400 
//
401 
`ifdef OR1200_DU_DCR3
402 
reg     [7:0]                    dcr3;
403 
`else
404 
wire    [7:0]                    dcr3;
405 
`endif
406 
 
407 
//
408 
// Debug Control Register N
409 
//
410 
`ifdef OR1200_DU_DCR4
411 
reg     [7:0]                    dcr4;
412 
`else
413 
wire    [7:0]                    dcr4;
414 
`endif
415 
 
416 
//
417 
// Debug Control Register N
418 
//
419 
`ifdef OR1200_DU_DCR5
420 
reg     [7:0]                    dcr5;
421 
`else
422 
wire    [7:0]                    dcr5;
423 
`endif
424 
 
425 
//
426 
// Debug Control Register N
427 
//
428 
`ifdef OR1200_DU_DCR6
429 
reg     [7:0]                    dcr6;
430 
`else
431 
wire    [7:0]                    dcr6;
432 
`endif
433 
 
434 
//
435 
// Debug Control Register N
436 
//
437 
`ifdef OR1200_DU_DCR7
438 
reg     [7:0]                    dcr7;
439 
`else
440 
wire    [7:0]                    dcr7;
441 
`endif
442 
 
443 
//
444 
// Debug Watchpoint Counter Register 0
445 
//
446 
`ifdef OR1200_DU_DWCR0
447 
reg     [31:0]                   dwcr0;
448 
`else
449 
wire    [31:0]                   dwcr0;
450 
`endif
451 
 
452 
//
453 
// Debug Watchpoint Counter Register 1
454 
//
455 
`ifdef OR1200_DU_DWCR1
456 
reg     [31:0]                   dwcr1;
457 
`else
458 
wire    [31:0]                   dwcr1;
459 
`endif
460 
 
461 
//
462 
// Internal wires
463 
//
464 
wire                            dmr1_sel;       // DMR1 select
465 
wire                            dmr2_sel;       // DMR2 select
466 
wire                            dsr_sel;        // DSR select
467 
wire                            drr_sel;        // DRR select
468 
wire                            dvr0_sel,
469 
                                dvr1_sel,
470 
                                dvr2_sel,
471 
                                dvr3_sel,
472 
                                dvr4_sel,
473 
                                dvr5_sel,
474 
                                dvr6_sel,
475 
                                dvr7_sel;       // DVR selects
476 
wire                            dcr0_sel,
477 
                                dcr1_sel,
478 
                                dcr2_sel,
479 
                                dcr3_sel,
480 
                                dcr4_sel,
481 
                                dcr5_sel,
482 
                                dcr6_sel,
483 
                                dcr7_sel;       // DCR selects
484 
wire                            dwcr0_sel,
485 
                                dwcr1_sel;      // DWCR selects
486 
reg                             dbg_bp_r;
487 
`ifdef OR1200_DU_HWBKPTS
488 
reg     [31:0]                   match_cond0_ct;
489 
reg     [31:0]                   match_cond1_ct;
490 
reg     [31:0]                   match_cond2_ct;
491 
reg     [31:0]                   match_cond3_ct;
492 
reg     [31:0]                   match_cond4_ct;
493 
reg     [31:0]                   match_cond5_ct;
494 
reg     [31:0]                   match_cond6_ct;
495 
reg     [31:0]                   match_cond7_ct;
496 
reg                             match_cond0_stb;
497 
reg                             match_cond1_stb;
498 
reg                             match_cond2_stb;
499 
reg                             match_cond3_stb;
500 
reg                             match_cond4_stb;
501 
reg                             match_cond5_stb;
502 
reg                             match_cond6_stb;
503 
reg                             match_cond7_stb;
504 
reg                             match0;
505 
reg                             match1;
506 
reg                             match2;
507 
reg                             match3;
508 
reg                             match4;
509 
reg                             match5;
510 
reg                             match6;
511 
reg                             match7;
512 
reg                             wpcntr0_match;
513 
reg                             wpcntr1_match;
514 
reg                             incr_wpcntr0;
515 
reg                             incr_wpcntr1;
516 
reg     [10:0]                   wp;
517 
`endif
518 
wire                            du_hwbkpt;
519 141 marcus.erl 
reg                             du_hwbkpt_hold;
520 10 unneback 
`ifdef OR1200_DU_READREGS
521 
reg     [31:0]                   spr_dat_o;
522 
`endif
523 
reg     [13:0]                   except_stop;    // Exceptions that stop because of DSR
524 
`ifdef OR1200_DU_TB_IMPLEMENTED
525 
wire                            tb_enw;
526 
reg     [7:0]                    tb_wadr;
527 
reg [31:0]                       tb_timstmp;
528 
`endif
529 
wire    [31:0]                   tbia_dat_o;
530 
wire    [31:0]                   tbim_dat_o;
531 
wire    [31:0]                   tbar_dat_o;
532 
wire    [31:0]                   tbts_dat_o;
533 
 
534 
//
535 
// DU registers address decoder
536 
//
537 
`ifdef OR1200_DU_DMR1
538 
assign dmr1_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DMR1));
539 
`endif
540 
`ifdef OR1200_DU_DMR2
541 
assign dmr2_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DMR2));
542 
`endif
543 
`ifdef OR1200_DU_DSR
544 
assign dsr_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DSR));
545 
`endif
546 
`ifdef OR1200_DU_DRR
547 
assign drr_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DRR));
548 
`endif
549 
`ifdef OR1200_DU_DVR0
550 
assign dvr0_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR0));
551 
`endif
552 
`ifdef OR1200_DU_DVR1
553 
assign dvr1_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR1));
554 
`endif
555 
`ifdef OR1200_DU_DVR2
556 
assign dvr2_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR2));
557 
`endif
558 
`ifdef OR1200_DU_DVR3
559 
assign dvr3_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR3));
560 
`endif
561 
`ifdef OR1200_DU_DVR4
562 
assign dvr4_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR4));
563 
`endif
564 
`ifdef OR1200_DU_DVR5
565 
assign dvr5_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR5));
566 
`endif
567 
`ifdef OR1200_DU_DVR6
568 
assign dvr6_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR6));
569 
`endif
570 
`ifdef OR1200_DU_DVR7
571 
assign dvr7_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DVR7));
572 
`endif
573 
`ifdef OR1200_DU_DCR0
574 
assign dcr0_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR0));
575 
`endif
576 
`ifdef OR1200_DU_DCR1
577 
assign dcr1_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR1));
578 
`endif
579 
`ifdef OR1200_DU_DCR2
580 
assign dcr2_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR2));
581 
`endif
582 
`ifdef OR1200_DU_DCR3
583 
assign dcr3_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR3));
584 
`endif
585 
`ifdef OR1200_DU_DCR4
586 
assign dcr4_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR4));
587 
`endif
588 
`ifdef OR1200_DU_DCR5
589 
assign dcr5_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR5));
590 
`endif
591 
`ifdef OR1200_DU_DCR6
592 
assign dcr6_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR6));
593 
`endif
594 
`ifdef OR1200_DU_DCR7
595 
assign dcr7_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DCR7));
596 
`endif
597 
`ifdef OR1200_DU_DWCR0
598 
assign dwcr0_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DWCR0));
599 
`endif
600 
`ifdef OR1200_DU_DWCR1
601 
assign dwcr1_sel = (spr_cs && (spr_addr[`OR1200_DUOFS_BITS] == `OR1200_DU_DWCR1));
602 
`endif
603 
 
604 
//
605 
// Decode started exception
606 
//
607 141 marcus.erl 
always @(du_except_stop) begin
608 10 unneback 
        except_stop = 14'b0000_0000_0000;
609 141 marcus.erl 
        casex (du_except_stop)
610 
                13'b1_xxxx_xxxx_xxxx: begin
611 10 unneback 
                        except_stop[`OR1200_DU_DRR_TTE] = 1'b1;
612 141 marcus.erl 
                end
613 10 unneback 
                13'b0_1xxx_xxxx_xxxx: begin
614 
                        except_stop[`OR1200_DU_DRR_IE] = 1'b1;
615 
                end
616 
                13'b0_01xx_xxxx_xxxx: begin
617 
                        except_stop[`OR1200_DU_DRR_IME] = 1'b1;
618 
                end
619 141 marcus.erl 
                13'b0_001x_xxxx_xxxx: begin
620 10 unneback 
                        except_stop[`OR1200_DU_DRR_IPFE] = 1'b1;
621 141 marcus.erl 
                end
622 10 unneback 
                13'b0_0001_xxxx_xxxx: begin
623 
                        except_stop[`OR1200_DU_DRR_BUSEE] = 1'b1;
624 
                end
625 141 marcus.erl 
                13'b0_0000_1xxx_xxxx: begin
626 10 unneback 
                        except_stop[`OR1200_DU_DRR_IIE] = 1'b1;
627 141 marcus.erl 
                end
628 10 unneback 
                13'b0_0000_01xx_xxxx: begin
629 
                        except_stop[`OR1200_DU_DRR_AE] = 1'b1;
630 
                end
631 
                13'b0_0000_001x_xxxx: begin
632 
                        except_stop[`OR1200_DU_DRR_DME] = 1'b1;
633 
                end
634 141 marcus.erl 
                13'b0_0000_0001_xxxx: begin
635 10 unneback 
                        except_stop[`OR1200_DU_DRR_DPFE] = 1'b1;
636 141 marcus.erl 
                end
637 
                13'b0_0000_0000_1xxx: begin
638 10 unneback 
                        except_stop[`OR1200_DU_DRR_BUSEE] = 1'b1;
639 141 marcus.erl 
                end
640 10 unneback 
                13'b0_0000_0000_01xx: begin
641 
                        except_stop[`OR1200_DU_DRR_RE] = 1'b1;
642 
                end
643 
                13'b0_0000_0000_001x: begin
644 
                        except_stop[`OR1200_DU_DRR_TE] = 1'b1;
645 
                end
646 141 marcus.erl 
                13'b0_0000_0000_0001: begin
647 10 unneback 
                        except_stop[`OR1200_DU_DRR_SCE] = 1'b1;
648 141 marcus.erl 
                end
649 10 unneback 
                default:
650 
                        except_stop = 14'b0000_0000_0000;
651 
        endcase
652 
end
653 
 
654 
//
655 
// dbg_bp_o is registered
656 
//
657 
assign dbg_bp_o = dbg_bp_r;
658 
 
659 
//
660 
// Breakpoint activation register
661 
//
662 
always @(posedge clk or posedge rst)
663 
        if (rst)
664 
                dbg_bp_r <= #1 1'b0;
665 
        else if (!ex_freeze)
666 
                dbg_bp_r <= #1 |except_stop
667 
`ifdef OR1200_DU_DMR1_ST
668 
                        | ~((ex_insn[31:26] == `OR1200_OR32_NOP) & ex_insn[16]) & dmr1[`OR1200_DU_DMR1_ST]
669 
`endif
670 
`ifdef OR1200_DU_DMR1_BT
671 141 marcus.erl 
                        | (branch_op != `OR1200_BRANCHOP_NOP) & (branch_op != `OR1200_BRANCHOP_RFE) & dmr1[`OR1200_DU_DMR1_BT]
672 10 unneback 
`endif
673 
                        ;
674 
        else
675 
                dbg_bp_r <= #1 |except_stop;
676 
 
677 
//
678 
// Write to DMR1
679 
//
680 
`ifdef OR1200_DU_DMR1
681 
always @(posedge clk or posedge rst)
682 
        if (rst)
683 
                dmr1 <= 25'h000_0000;
684 
        else if (dmr1_sel && spr_write)
685 
`ifdef OR1200_DU_HWBKPTS
686 
                dmr1 <= #1 spr_dat_i[24:0];
687 
`else
688 
                dmr1 <= #1 {1'b0, spr_dat_i[23:22], 22'h00_0000};
689 
`endif
690 
`else
691 
assign dmr1 = 25'h000_0000;
692 
`endif
693 
 
694 
//
695 
// Write to DMR2
696 
//
697 
`ifdef OR1200_DU_DMR2
698 
always @(posedge clk or posedge rst)
699 
        if (rst)
700 
                dmr2 <= 24'h00_0000;
701 
        else if (dmr2_sel && spr_write)
702 
                dmr2 <= #1 spr_dat_i[23:0];
703 
`else
704 
assign dmr2 = 24'h00_0000;
705 
`endif
706 
 
707 
//
708 
// Write to DSR
709 
//
710 
`ifdef OR1200_DU_DSR
711 
always @(posedge clk or posedge rst)
712 
        if (rst)
713 
                dsr <= {`OR1200_DU_DSR_WIDTH{1'b0}};
714 
        else if (dsr_sel && spr_write)
715 
                dsr <= #1 spr_dat_i[`OR1200_DU_DSR_WIDTH-1:0];
716 
`else
717 
assign dsr = {`OR1200_DU_DSR_WIDTH{1'b0}};
718 
`endif
719 
 
720 
//
721 
// Write to DRR
722 
//
723 
`ifdef OR1200_DU_DRR
724 
always @(posedge clk or posedge rst)
725 
        if (rst)
726 
                drr <= 14'b0;
727 
        else if (drr_sel && spr_write)
728 
                drr <= #1 spr_dat_i[13:0];
729 
        else
730 
                drr <= #1 drr | except_stop;
731 
`else
732 
assign drr = 14'b0;
733 
`endif
734 
 
735 
//
736 
// Write to DVR0
737 
//
738 
`ifdef OR1200_DU_DVR0
739 
always @(posedge clk or posedge rst)
740 
        if (rst)
741 
                dvr0 <= 32'h0000_0000;
742 
        else if (dvr0_sel && spr_write)
743 
                dvr0 <= #1 spr_dat_i[31:0];
744 
`else
745 
assign dvr0 = 32'h0000_0000;
746 
`endif
747 
 
748 
//
749 
// Write to DVR1
750 
//
751 
`ifdef OR1200_DU_DVR1
752 
always @(posedge clk or posedge rst)
753 
        if (rst)
754 
                dvr1 <= 32'h0000_0000;
755 
        else if (dvr1_sel && spr_write)
756 
                dvr1 <= #1 spr_dat_i[31:0];
757 
`else
758 
assign dvr1 = 32'h0000_0000;
759 
`endif
760 
 
761 
//
762 
// Write to DVR2
763 
//
764 
`ifdef OR1200_DU_DVR2
765 
always @(posedge clk or posedge rst)
766 
        if (rst)
767 
                dvr2 <= 32'h0000_0000;
768 
        else if (dvr2_sel && spr_write)
769 
                dvr2 <= #1 spr_dat_i[31:0];
770 
`else
771 
assign dvr2 = 32'h0000_0000;
772 
`endif
773 
 
774 
//
775 
// Write to DVR3
776 
//
777 
`ifdef OR1200_DU_DVR3
778 
always @(posedge clk or posedge rst)
779 
        if (rst)
780 
                dvr3 <= 32'h0000_0000;
781 
        else if (dvr3_sel && spr_write)
782 
                dvr3 <= #1 spr_dat_i[31:0];
783 
`else
784 
assign dvr3 = 32'h0000_0000;
785 
`endif
786 
 
787 
//
788 
// Write to DVR4
789 
//
790 
`ifdef OR1200_DU_DVR4
791 
always @(posedge clk or posedge rst)
792 
        if (rst)
793 
                dvr4 <= 32'h0000_0000;
794 
        else if (dvr4_sel && spr_write)
795 
                dvr4 <= #1 spr_dat_i[31:0];
796 
`else
797 
assign dvr4 = 32'h0000_0000;
798 
`endif
799 
 
800 
//
801 
// Write to DVR5
802 
//
803 
`ifdef OR1200_DU_DVR5
804 
always @(posedge clk or posedge rst)
805 
        if (rst)
806 
                dvr5 <= 32'h0000_0000;
807 
        else if (dvr5_sel && spr_write)
808 
                dvr5 <= #1 spr_dat_i[31:0];
809 
`else
810 
assign dvr5 = 32'h0000_0000;
811 
`endif
812 
 
813 
//
814 
// Write to DVR6
815 
//
816 
`ifdef OR1200_DU_DVR6
817 
always @(posedge clk or posedge rst)
818 
        if (rst)
819 
                dvr6 <= 32'h0000_0000;
820 
        else if (dvr6_sel && spr_write)
821 
                dvr6 <= #1 spr_dat_i[31:0];
822 
`else
823 
assign dvr6 = 32'h0000_0000;
824 
`endif
825 
 
826 
//
827 
// Write to DVR7
828 
//
829 
`ifdef OR1200_DU_DVR7
830 
always @(posedge clk or posedge rst)
831 
        if (rst)
832 
                dvr7 <= 32'h0000_0000;
833 
        else if (dvr7_sel && spr_write)
834 
                dvr7 <= #1 spr_dat_i[31:0];
835 
`else
836 
assign dvr7 = 32'h0000_0000;
837 
`endif
838 
 
839 
//
840 
// Write to DCR0
841 
//
842 
`ifdef OR1200_DU_DCR0
843 
always @(posedge clk or posedge rst)
844 
        if (rst)
845 
                dcr0 <= 8'h00;
846 
        else if (dcr0_sel && spr_write)
847 
                dcr0 <= #1 spr_dat_i[7:0];
848 
`else
849 
assign dcr0 = 8'h00;
850 
`endif
851 
 
852 
//
853 
// Write to DCR1
854 
//
855 
`ifdef OR1200_DU_DCR1
856 
always @(posedge clk or posedge rst)
857 
        if (rst)
858 
                dcr1 <= 8'h00;
859 
        else if (dcr1_sel && spr_write)
860 
                dcr1 <= #1 spr_dat_i[7:0];
861 
`else
862 
assign dcr1 = 8'h00;
863 
`endif
864 
 
865 
//
866 
// Write to DCR2
867 
//
868 
`ifdef OR1200_DU_DCR2
869 
always @(posedge clk or posedge rst)
870 
        if (rst)
871 
                dcr2 <= 8'h00;
872 
        else if (dcr2_sel && spr_write)
873 
                dcr2 <= #1 spr_dat_i[7:0];
874 
`else
875 
assign dcr2 = 8'h00;
876 
`endif
877 
 
878 
//
879 
// Write to DCR3
880 
//
881 
`ifdef OR1200_DU_DCR3
882 
always @(posedge clk or posedge rst)
883 
        if (rst)
884 
                dcr3 <= 8'h00;
885 
        else if (dcr3_sel && spr_write)
886 
                dcr3 <= #1 spr_dat_i[7:0];
887 
`else
888 
assign dcr3 = 8'h00;
889 
`endif
890 
 
891 
//
892 
// Write to DCR4
893 
//
894 
`ifdef OR1200_DU_DCR4
895 
always @(posedge clk or posedge rst)
896 
        if (rst)
897 
                dcr4 <= 8'h00;
898 
        else if (dcr4_sel && spr_write)
899 
                dcr4 <= #1 spr_dat_i[7:0];
900 
`else
901 
assign dcr4 = 8'h00;
902 
`endif
903 
 
904 
//
905 
// Write to DCR5
906 
//
907 
`ifdef OR1200_DU_DCR5
908 
always @(posedge clk or posedge rst)
909 
        if (rst)
910 
                dcr5 <= 8'h00;
911 
        else if (dcr5_sel && spr_write)
912 
                dcr5 <= #1 spr_dat_i[7:0];
913 
`else
914 
assign dcr5 = 8'h00;
915 
`endif
916 
 
917 
//
918 
// Write to DCR6
919 
//
920 
`ifdef OR1200_DU_DCR6
921 
always @(posedge clk or posedge rst)
922 
        if (rst)
923 
                dcr6 <= 8'h00;
924 
        else if (dcr6_sel && spr_write)
925 
                dcr6 <= #1 spr_dat_i[7:0];
926 
`else
927 
assign dcr6 = 8'h00;
928 
`endif
929 
 
930 
//
931 
// Write to DCR7
932 
//
933 
`ifdef OR1200_DU_DCR7
934 
always @(posedge clk or posedge rst)
935 
        if (rst)
936 
                dcr7 <= 8'h00;
937 
        else if (dcr7_sel && spr_write)
938 
                dcr7 <= #1 spr_dat_i[7:0];
939 
`else
940 
assign dcr7 = 8'h00;
941 
`endif
942 
 
943 
//
944 
// Write to DWCR0
945 
//
946 
`ifdef OR1200_DU_DWCR0
947 
always @(posedge clk or posedge rst)
948 
        if (rst)
949 
                dwcr0 <= 32'h0000_0000;
950 
        else if (dwcr0_sel && spr_write)
951 
                dwcr0 <= #1 spr_dat_i[31:0];
952 
        else if (incr_wpcntr0)
953 
                dwcr0[`OR1200_DU_DWCR_COUNT] <= #1 dwcr0[`OR1200_DU_DWCR_COUNT] + 16'h0001;
954 
`else
955 
assign dwcr0 = 32'h0000_0000;
956 
`endif
957 
 
958 
//
959 
// Write to DWCR1
960 
//
961 
`ifdef OR1200_DU_DWCR1
962 
always @(posedge clk or posedge rst)
963 
        if (rst)
964 
                dwcr1 <= 32'h0000_0000;
965 
        else if (dwcr1_sel && spr_write)
966 
                dwcr1 <= #1 spr_dat_i[31:0];
967 
        else if (incr_wpcntr1)
968 
                dwcr1[`OR1200_DU_DWCR_COUNT] <= #1 dwcr1[`OR1200_DU_DWCR_COUNT] + 16'h0001;
969 
`else
970 
assign dwcr1 = 32'h0000_0000;
971 
`endif
972 
 
973 
//
974 
// Read DU registers
975 
//
976 
`ifdef OR1200_DU_READREGS
977 
always @(spr_addr or dsr or drr or dmr1 or dmr2
978 
        or dvr0 or dvr1 or dvr2 or dvr3 or dvr4
979 
        or dvr5 or dvr6 or dvr7
980 
        or dcr0 or dcr1 or dcr2 or dcr3 or dcr4
981 
        or dcr5 or dcr6 or dcr7
982 
        or dwcr0 or dwcr1
983 
`ifdef OR1200_DU_TB_IMPLEMENTED
984 
        or tb_wadr or tbia_dat_o or tbim_dat_o
985 
        or tbar_dat_o or tbts_dat_o
986 
`endif
987 
        )
988 
        casex (spr_addr[`OR1200_DUOFS_BITS]) // synopsys parallel_case
989 
`ifdef OR1200_DU_DVR0
990 
                `OR1200_DU_DVR0:
991 
                        spr_dat_o = dvr0;
992 
`endif
993 
`ifdef OR1200_DU_DVR1
994 
                `OR1200_DU_DVR1:
995 
                        spr_dat_o = dvr1;
996 
`endif
997 
`ifdef OR1200_DU_DVR2
998 
                `OR1200_DU_DVR2:
999 
                        spr_dat_o = dvr2;
1000 
`endif
1001 
`ifdef OR1200_DU_DVR3
1002 
                `OR1200_DU_DVR3:
1003 
                        spr_dat_o = dvr3;
1004 
`endif
1005 
`ifdef OR1200_DU_DVR4
1006 
                `OR1200_DU_DVR4:
1007 
                        spr_dat_o = dvr4;
1008 
`endif
1009 
`ifdef OR1200_DU_DVR5
1010 
                `OR1200_DU_DVR5:
1011 
                        spr_dat_o = dvr5;
1012 
`endif
1013 
`ifdef OR1200_DU_DVR6
1014 
                `OR1200_DU_DVR6:
1015 
                        spr_dat_o = dvr6;
1016 
`endif
1017 
`ifdef OR1200_DU_DVR7
1018 
                `OR1200_DU_DVR7:
1019 
                        spr_dat_o = dvr7;
1020 
`endif
1021 
`ifdef OR1200_DU_DCR0
1022 
                `OR1200_DU_DCR0:
1023 
                        spr_dat_o = {24'h00_0000, dcr0};
1024 
`endif
1025 
`ifdef OR1200_DU_DCR1
1026 
                `OR1200_DU_DCR1:
1027 
                        spr_dat_o = {24'h00_0000, dcr1};
1028 
`endif
1029 
`ifdef OR1200_DU_DCR2
1030 
                `OR1200_DU_DCR2:
1031 
                        spr_dat_o = {24'h00_0000, dcr2};
1032 
`endif
1033 
`ifdef OR1200_DU_DCR3
1034 
                `OR1200_DU_DCR3:
1035 
                        spr_dat_o = {24'h00_0000, dcr3};
1036 
`endif
1037 
`ifdef OR1200_DU_DCR4
1038 
                `OR1200_DU_DCR4:
1039 
                        spr_dat_o = {24'h00_0000, dcr4};
1040 
`endif
1041 
`ifdef OR1200_DU_DCR5
1042 
                `OR1200_DU_DCR5:
1043 
                        spr_dat_o = {24'h00_0000, dcr5};
1044 
`endif
1045 
`ifdef OR1200_DU_DCR6
1046 
                `OR1200_DU_DCR6:
1047 
                        spr_dat_o = {24'h00_0000, dcr6};
1048 
`endif
1049 
`ifdef OR1200_DU_DCR7
1050 
                `OR1200_DU_DCR7:
1051 
                        spr_dat_o = {24'h00_0000, dcr7};
1052 
`endif
1053 
`ifdef OR1200_DU_DMR1
1054 
                `OR1200_DU_DMR1:
1055 
                        spr_dat_o = {7'h00, dmr1};
1056 
`endif
1057 
`ifdef OR1200_DU_DMR2
1058 
                `OR1200_DU_DMR2:
1059 
                        spr_dat_o = {8'h00, dmr2};
1060 
`endif
1061 
`ifdef OR1200_DU_DWCR0
1062 
                `OR1200_DU_DWCR0:
1063 
                        spr_dat_o = dwcr0;
1064 
`endif
1065 
`ifdef OR1200_DU_DWCR1
1066 
                `OR1200_DU_DWCR1:
1067 
                        spr_dat_o = dwcr1;
1068 
`endif
1069 
`ifdef OR1200_DU_DSR
1070 
                `OR1200_DU_DSR:
1071 
                        spr_dat_o = {18'b0, dsr};
1072 
`endif
1073 
`ifdef OR1200_DU_DRR
1074 
                `OR1200_DU_DRR:
1075 
                        spr_dat_o = {18'b0, drr};
1076 
`endif
1077 
`ifdef OR1200_DU_TB_IMPLEMENTED
1078 
                `OR1200_DU_TBADR:
1079 
                        spr_dat_o = {24'h000000, tb_wadr};
1080 
                `OR1200_DU_TBIA:
1081 
                        spr_dat_o = tbia_dat_o;
1082 
                `OR1200_DU_TBIM:
1083 
                        spr_dat_o = tbim_dat_o;
1084 
                `OR1200_DU_TBAR:
1085 
                        spr_dat_o = tbar_dat_o;
1086 
                `OR1200_DU_TBTS:
1087 
                        spr_dat_o = tbts_dat_o;
1088 
`endif
1089 
                default:
1090 
                        spr_dat_o = 32'h0000_0000;
1091 
        endcase
1092 
`endif
1093 
 
1094 
//
1095 
// DSR alias
1096 
//
1097 
assign du_dsr = dsr;
1098 
 
1099 
`ifdef OR1200_DU_HWBKPTS
1100 
 
1101 
//
1102 
// Compare To What (Match Condition 0)
1103 
//
1104 
always @(dcr0 or id_pc or dcpu_adr_i or dcpu_dat_dc
1105 
        or dcpu_dat_lsu or dcpu_we_i)
1106 
        case (dcr0[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1107 
                3'b001: match_cond0_ct = id_pc;         // insn fetch EA
1108 
                3'b010: match_cond0_ct = dcpu_adr_i;    // load EA
1109 
                3'b011: match_cond0_ct = dcpu_adr_i;    // store EA
1110 
                3'b100: match_cond0_ct = dcpu_dat_dc;   // load data
1111 
                3'b101: match_cond0_ct = dcpu_dat_lsu;  // store data
1112 
                3'b110: match_cond0_ct = dcpu_adr_i;    // load/store EA
1113 
                default:match_cond0_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1114 
        endcase
1115 
 
1116 
//
1117 
// When To Compare (Match Condition 0)
1118 
//
1119 
always @(dcr0 or dcpu_cycstb_i)
1120 
        case (dcr0[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1121 
                3'b000: match_cond0_stb = 1'b0;         //comparison disabled
1122 
                3'b001: match_cond0_stb = 1'b1;         // insn fetch EA
1123 
                default:match_cond0_stb = dcpu_cycstb_i; // any load/store
1124 
        endcase
1125 
 
1126 
//
1127 
// Match Condition 0
1128 
//
1129 
always @(match_cond0_stb or dcr0 or dvr0 or match_cond0_ct)
1130 
        casex ({match_cond0_stb, dcr0[`OR1200_DU_DCR_CC]})
1131 
                4'b0_xxx,
1132 
                4'b1_000,
1133 
                4'b1_111: match0 = 1'b0;
1134 
                4'b1_001: match0 =
1135 141 marcus.erl 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} ==
1136 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1137 10 unneback 
                4'b1_010: match0 =
1138 141 marcus.erl 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} <
1139 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1140 10 unneback 
                4'b1_011: match0 =
1141 141 marcus.erl 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} <=
1142 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1143 10 unneback 
                4'b1_100: match0 =
1144 141 marcus.erl 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} >
1145 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1146 10 unneback 
                4'b1_101: match0 =
1147 141 marcus.erl 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} >=
1148 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1149 10 unneback 
                4'b1_110: match0 =
1150 141 marcus.erl 
                        ({(match_cond0_ct[31] ^ dcr0[`OR1200_DU_DCR_SC]), match_cond0_ct[30:0]} !=
1151 
                         {(dvr0[31] ^ dcr0[`OR1200_DU_DCR_SC]), dvr0[30:0]});
1152 10 unneback 
        endcase
1153 
 
1154 
//
1155 
// Watchpoint 0
1156 
//
1157 
always @(dmr1 or match0)
1158 
        case (dmr1[`OR1200_DU_DMR1_CW0])
1159 
                2'b00: wp[0] = match0;
1160 
                2'b01: wp[0] = match0;
1161 
                2'b10: wp[0] = match0;
1162 
                2'b11: wp[0] = 1'b0;
1163 
        endcase
1164 
 
1165 
//
1166 
// Compare To What (Match Condition 1)
1167 
//
1168 
always @(dcr1 or id_pc or dcpu_adr_i or dcpu_dat_dc
1169 
        or dcpu_dat_lsu or dcpu_we_i)
1170 
        case (dcr1[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1171 
                3'b001: match_cond1_ct = id_pc;         // insn fetch EA
1172 
                3'b010: match_cond1_ct = dcpu_adr_i;    // load EA
1173 
                3'b011: match_cond1_ct = dcpu_adr_i;    // store EA
1174 
                3'b100: match_cond1_ct = dcpu_dat_dc;   // load data
1175 
                3'b101: match_cond1_ct = dcpu_dat_lsu;  // store data
1176 
                3'b110: match_cond1_ct = dcpu_adr_i;    // load/store EA
1177 
                default:match_cond1_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1178 
        endcase
1179 
 
1180 
//
1181 
// When To Compare (Match Condition 1)
1182 
//
1183 
always @(dcr1 or dcpu_cycstb_i)
1184 
        case (dcr1[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1185 
                3'b000: match_cond1_stb = 1'b0;         //comparison disabled
1186 
                3'b001: match_cond1_stb = 1'b1;         // insn fetch EA
1187 
                default:match_cond1_stb = dcpu_cycstb_i; // any load/store
1188 
        endcase
1189 
 
1190 
//
1191 
// Match Condition 1
1192 
//
1193 
always @(match_cond1_stb or dcr1 or dvr1 or match_cond1_ct)
1194 
        casex ({match_cond1_stb, dcr1[`OR1200_DU_DCR_CC]})
1195 
                4'b0_xxx,
1196 
                4'b1_000,
1197 
                4'b1_111: match1 = 1'b0;
1198 
                4'b1_001: match1 =
1199 141 marcus.erl 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} ==
1200 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1201 10 unneback 
                4'b1_010: match1 =
1202 141 marcus.erl 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} <
1203 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1204 10 unneback 
                4'b1_011: match1 =
1205 141 marcus.erl 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} <=
1206 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1207 10 unneback 
                4'b1_100: match1 =
1208 141 marcus.erl 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} >
1209 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1210 10 unneback 
                4'b1_101: match1 =
1211 141 marcus.erl 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} >=
1212 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1213 10 unneback 
                4'b1_110: match1 =
1214 141 marcus.erl 
                        ({(match_cond1_ct[31] ^ dcr1[`OR1200_DU_DCR_SC]), match_cond1_ct[30:0]} !=
1215 
                         {(dvr1[31] ^ dcr1[`OR1200_DU_DCR_SC]), dvr1[30:0]});
1216 10 unneback 
        endcase
1217 
 
1218 
//
1219 
// Watchpoint 1
1220 
//
1221 
always @(dmr1 or match1 or wp)
1222 
        case (dmr1[`OR1200_DU_DMR1_CW1])
1223 
                2'b00: wp[1] = match1;
1224 
                2'b01: wp[1] = match1 & wp[0];
1225 
                2'b10: wp[1] = match1 | wp[0];
1226 
                2'b11: wp[1] = 1'b0;
1227 
        endcase
1228 
 
1229 
//
1230 
// Compare To What (Match Condition 2)
1231 
//
1232 
always @(dcr2 or id_pc or dcpu_adr_i or dcpu_dat_dc
1233 
        or dcpu_dat_lsu or dcpu_we_i)
1234 
        case (dcr2[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1235 
                3'b001: match_cond2_ct = id_pc;         // insn fetch EA
1236 
                3'b010: match_cond2_ct = dcpu_adr_i;    // load EA
1237 
                3'b011: match_cond2_ct = dcpu_adr_i;    // store EA
1238 
                3'b100: match_cond2_ct = dcpu_dat_dc;   // load data
1239 
                3'b101: match_cond2_ct = dcpu_dat_lsu;  // store data
1240 
                3'b110: match_cond2_ct = dcpu_adr_i;    // load/store EA
1241 
                default:match_cond2_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1242 
        endcase
1243 
 
1244 
//
1245 
// When To Compare (Match Condition 2)
1246 
//
1247 
always @(dcr2 or dcpu_cycstb_i)
1248 
        case (dcr2[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1249 
                3'b000: match_cond2_stb = 1'b0;         //comparison disabled
1250 
                3'b001: match_cond2_stb = 1'b1;         // insn fetch EA
1251 
                default:match_cond2_stb = dcpu_cycstb_i; // any load/store
1252 
        endcase
1253 
 
1254 
//
1255 
// Match Condition 2
1256 
//
1257 
always @(match_cond2_stb or dcr2 or dvr2 or match_cond2_ct)
1258 
        casex ({match_cond2_stb, dcr2[`OR1200_DU_DCR_CC]})
1259 
                4'b0_xxx,
1260 
                4'b1_000,
1261 
                4'b1_111: match2 = 1'b0;
1262 
                4'b1_001: match2 =
1263 141 marcus.erl 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} ==
1264 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1265 10 unneback 
                4'b1_010: match2 =
1266 141 marcus.erl 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} <
1267 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1268 10 unneback 
                4'b1_011: match2 =
1269 141 marcus.erl 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} <=
1270 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1271 10 unneback 
                4'b1_100: match2 =
1272 141 marcus.erl 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} >
1273 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1274 10 unneback 
                4'b1_101: match2 =
1275 141 marcus.erl 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} >=
1276 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1277 10 unneback 
                4'b1_110: match2 =
1278 141 marcus.erl 
                        ({(match_cond2_ct[31] ^ dcr2[`OR1200_DU_DCR_SC]), match_cond2_ct[30:0]} !=
1279 
                         {(dvr2[31] ^ dcr2[`OR1200_DU_DCR_SC]), dvr2[30:0]});
1280 10 unneback 
        endcase
1281 
 
1282 
//
1283 
// Watchpoint 2
1284 
//
1285 
always @(dmr1 or match2 or wp)
1286 
        case (dmr1[`OR1200_DU_DMR1_CW2])
1287 
                2'b00: wp[2] = match2;
1288 
                2'b01: wp[2] = match2 & wp[1];
1289 
                2'b10: wp[2] = match2 | wp[1];
1290 
                2'b11: wp[2] = 1'b0;
1291 
        endcase
1292 
 
1293 
//
1294 
// Compare To What (Match Condition 3)
1295 
//
1296 
always @(dcr3 or id_pc or dcpu_adr_i or dcpu_dat_dc
1297 
        or dcpu_dat_lsu or dcpu_we_i)
1298 
        case (dcr3[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1299 
                3'b001: match_cond3_ct = id_pc;         // insn fetch EA
1300 
                3'b010: match_cond3_ct = dcpu_adr_i;    // load EA
1301 
                3'b011: match_cond3_ct = dcpu_adr_i;    // store EA
1302 
                3'b100: match_cond3_ct = dcpu_dat_dc;   // load data
1303 
                3'b101: match_cond3_ct = dcpu_dat_lsu;  // store data
1304 
                3'b110: match_cond3_ct = dcpu_adr_i;    // load/store EA
1305 
                default:match_cond3_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1306 
        endcase
1307 
 
1308 
//
1309 
// When To Compare (Match Condition 3)
1310 
//
1311 
always @(dcr3 or dcpu_cycstb_i)
1312 
        case (dcr3[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1313 
                3'b000: match_cond3_stb = 1'b0;         //comparison disabled
1314 
                3'b001: match_cond3_stb = 1'b1;         // insn fetch EA
1315 
                default:match_cond3_stb = dcpu_cycstb_i; // any load/store
1316 
        endcase
1317 
 
1318 
//
1319 
// Match Condition 3
1320 
//
1321 
always @(match_cond3_stb or dcr3 or dvr3 or match_cond3_ct)
1322 
        casex ({match_cond3_stb, dcr3[`OR1200_DU_DCR_CC]})
1323 
                4'b0_xxx,
1324 
                4'b1_000,
1325 
                4'b1_111: match3 = 1'b0;
1326 
                4'b1_001: match3 =
1327 141 marcus.erl 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} ==
1328 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1329 10 unneback 
                4'b1_010: match3 =
1330 141 marcus.erl 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} <
1331 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1332 10 unneback 
                4'b1_011: match3 =
1333 141 marcus.erl 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} <=
1334 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1335 10 unneback 
                4'b1_100: match3 =
1336 141 marcus.erl 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} >
1337 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1338 10 unneback 
                4'b1_101: match3 =
1339 141 marcus.erl 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} >=
1340 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1341 10 unneback 
                4'b1_110: match3 =
1342 141 marcus.erl 
                        ({(match_cond3_ct[31] ^ dcr3[`OR1200_DU_DCR_SC]), match_cond3_ct[30:0]} !=
1343 
                         {(dvr3[31] ^ dcr3[`OR1200_DU_DCR_SC]), dvr3[30:0]});
1344 10 unneback 
        endcase
1345 
 
1346 
//
1347 
// Watchpoint 3
1348 
//
1349 
always @(dmr1 or match3 or wp)
1350 
        case (dmr1[`OR1200_DU_DMR1_CW3])
1351 
                2'b00: wp[3] = match3;
1352 
                2'b01: wp[3] = match3 & wp[2];
1353 
                2'b10: wp[3] = match3 | wp[2];
1354 
                2'b11: wp[3] = 1'b0;
1355 
        endcase
1356 
 
1357 
//
1358 
// Compare To What (Match Condition 4)
1359 
//
1360 
always @(dcr4 or id_pc or dcpu_adr_i or dcpu_dat_dc
1361 
        or dcpu_dat_lsu or dcpu_we_i)
1362 
        case (dcr4[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1363 
                3'b001: match_cond4_ct = id_pc;         // insn fetch EA
1364 
                3'b010: match_cond4_ct = dcpu_adr_i;    // load EA
1365 
                3'b011: match_cond4_ct = dcpu_adr_i;    // store EA
1366 
                3'b100: match_cond4_ct = dcpu_dat_dc;   // load data
1367 
                3'b101: match_cond4_ct = dcpu_dat_lsu;  // store data
1368 
                3'b110: match_cond4_ct = dcpu_adr_i;    // load/store EA
1369 
                default:match_cond4_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1370 
        endcase
1371 
 
1372 
//
1373 
// When To Compare (Match Condition 4)
1374 
//
1375 
always @(dcr4 or dcpu_cycstb_i)
1376 
        case (dcr4[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1377 
                3'b000: match_cond4_stb = 1'b0;         //comparison disabled
1378 
                3'b001: match_cond4_stb = 1'b1;         // insn fetch EA
1379 
                default:match_cond4_stb = dcpu_cycstb_i; // any load/store
1380 
        endcase
1381 
 
1382 
//
1383 
// Match Condition 4
1384 
//
1385 
always @(match_cond4_stb or dcr4 or dvr4 or match_cond4_ct)
1386 
        casex ({match_cond4_stb, dcr4[`OR1200_DU_DCR_CC]})
1387 
                4'b0_xxx,
1388 
                4'b1_000,
1389 
                4'b1_111: match4 = 1'b0;
1390 
                4'b1_001: match4 =
1391 141 marcus.erl 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} ==
1392 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1393 10 unneback 
                4'b1_010: match4 =
1394 141 marcus.erl 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} <
1395 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1396 10 unneback 
                4'b1_011: match4 =
1397 141 marcus.erl 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} <=
1398 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1399 10 unneback 
                4'b1_100: match4 =
1400 141 marcus.erl 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} >
1401 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1402 10 unneback 
                4'b1_101: match4 =
1403 141 marcus.erl 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} >=
1404 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1405 10 unneback 
                4'b1_110: match4 =
1406 141 marcus.erl 
                        ({(match_cond4_ct[31] ^ dcr4[`OR1200_DU_DCR_SC]), match_cond4_ct[30:0]} !=
1407 
                         {(dvr4[31] ^ dcr4[`OR1200_DU_DCR_SC]), dvr4[30:0]});
1408 10 unneback 
        endcase
1409 
 
1410 
//
1411 
// Watchpoint 4
1412 
//
1413 
always @(dmr1 or match4 or wp)
1414 
        case (dmr1[`OR1200_DU_DMR1_CW4])
1415 
                2'b00: wp[4] = match4;
1416 
                2'b01: wp[4] = match4 & wp[3];
1417 
                2'b10: wp[4] = match4 | wp[3];
1418 
                2'b11: wp[4] = 1'b0;
1419 
        endcase
1420 
 
1421 
//
1422 
// Compare To What (Match Condition 5)
1423 
//
1424 
always @(dcr5 or id_pc or dcpu_adr_i or dcpu_dat_dc
1425 
        or dcpu_dat_lsu or dcpu_we_i)
1426 
        case (dcr5[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1427 
                3'b001: match_cond5_ct = id_pc;         // insn fetch EA
1428 
                3'b010: match_cond5_ct = dcpu_adr_i;    // load EA
1429 
                3'b011: match_cond5_ct = dcpu_adr_i;    // store EA
1430 
                3'b100: match_cond5_ct = dcpu_dat_dc;   // load data
1431 
                3'b101: match_cond5_ct = dcpu_dat_lsu;  // store data
1432 
                3'b110: match_cond5_ct = dcpu_adr_i;    // load/store EA
1433 
                default:match_cond5_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1434 
        endcase
1435 
 
1436 
//
1437 
// When To Compare (Match Condition 5)
1438 
//
1439 
always @(dcr5 or dcpu_cycstb_i)
1440 
        case (dcr5[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1441 
                3'b000: match_cond5_stb = 1'b0;         //comparison disabled
1442 
                3'b001: match_cond5_stb = 1'b1;         // insn fetch EA
1443 
                default:match_cond5_stb = dcpu_cycstb_i; // any load/store
1444 
        endcase
1445 
 
1446 
//
1447 
// Match Condition 5
1448 
//
1449 
always @(match_cond5_stb or dcr5 or dvr5 or match_cond5_ct)
1450 
        casex ({match_cond5_stb, dcr5[`OR1200_DU_DCR_CC]})
1451 
                4'b0_xxx,
1452 
                4'b1_000,
1453 
                4'b1_111: match5 = 1'b0;
1454 
                4'b1_001: match5 =
1455 141 marcus.erl 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} ==
1456 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1457 10 unneback 
                4'b1_010: match5 =
1458 141 marcus.erl 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} <
1459 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1460 10 unneback 
                4'b1_011: match5 =
1461 141 marcus.erl 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} <=
1462 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1463 10 unneback 
                4'b1_100: match5 =
1464 141 marcus.erl 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} >
1465 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1466 10 unneback 
                4'b1_101: match5 =
1467 141 marcus.erl 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} >=
1468 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1469 10 unneback 
                4'b1_110: match5 =
1470 141 marcus.erl 
                        ({(match_cond5_ct[31] ^ dcr5[`OR1200_DU_DCR_SC]), match_cond5_ct[30:0]} !=
1471 
                         {(dvr5[31] ^ dcr5[`OR1200_DU_DCR_SC]), dvr5[30:0]});
1472 10 unneback 
        endcase
1473 
 
1474 
//
1475 
// Watchpoint 5
1476 
//
1477 
always @(dmr1 or match5 or wp)
1478 
        case (dmr1[`OR1200_DU_DMR1_CW5])
1479 
                2'b00: wp[5] = match5;
1480 
                2'b01: wp[5] = match5 & wp[4];
1481 
                2'b10: wp[5] = match5 | wp[4];
1482 
                2'b11: wp[5] = 1'b0;
1483 
        endcase
1484 
 
1485 
//
1486 
// Compare To What (Match Condition 6)
1487 
//
1488 
always @(dcr6 or id_pc or dcpu_adr_i or dcpu_dat_dc
1489 
        or dcpu_dat_lsu or dcpu_we_i)
1490 
        case (dcr6[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1491 
                3'b001: match_cond6_ct = id_pc;         // insn fetch EA
1492 
                3'b010: match_cond6_ct = dcpu_adr_i;    // load EA
1493 
                3'b011: match_cond6_ct = dcpu_adr_i;    // store EA
1494 
                3'b100: match_cond6_ct = dcpu_dat_dc;   // load data
1495 
                3'b101: match_cond6_ct = dcpu_dat_lsu;  // store data
1496 
                3'b110: match_cond6_ct = dcpu_adr_i;    // load/store EA
1497 
                default:match_cond6_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1498 
        endcase
1499 
 
1500 
//
1501 
// When To Compare (Match Condition 6)
1502 
//
1503 
always @(dcr6 or dcpu_cycstb_i)
1504 
        case (dcr6[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1505 
                3'b000: match_cond6_stb = 1'b0;         //comparison disabled
1506 
                3'b001: match_cond6_stb = 1'b1;         // insn fetch EA
1507 
                default:match_cond6_stb = dcpu_cycstb_i; // any load/store
1508 
        endcase
1509 
 
1510 
//
1511 
// Match Condition 6
1512 
//
1513 
always @(match_cond6_stb or dcr6 or dvr6 or match_cond6_ct)
1514 
        casex ({match_cond6_stb, dcr6[`OR1200_DU_DCR_CC]})
1515 
                4'b0_xxx,
1516 
                4'b1_000,
1517 
                4'b1_111: match6 = 1'b0;
1518 
                4'b1_001: match6 =
1519 141 marcus.erl 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} ==
1520 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1521 10 unneback 
                4'b1_010: match6 =
1522 141 marcus.erl 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} <
1523 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1524 10 unneback 
                4'b1_011: match6 =
1525 141 marcus.erl 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} <=
1526 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1527 10 unneback 
                4'b1_100: match6 =
1528 141 marcus.erl 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} >
1529 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1530 10 unneback 
                4'b1_101: match6 =
1531 141 marcus.erl 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} >=
1532 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1533 10 unneback 
                4'b1_110: match6 =
1534 141 marcus.erl 
                        ({(match_cond6_ct[31] ^ dcr6[`OR1200_DU_DCR_SC]), match_cond6_ct[30:0]} !=
1535 
                         {(dvr6[31] ^ dcr6[`OR1200_DU_DCR_SC]), dvr6[30:0]});
1536 10 unneback 
        endcase
1537 
 
1538 
//
1539 
// Watchpoint 6
1540 
//
1541 
always @(dmr1 or match6 or wp)
1542 
        case (dmr1[`OR1200_DU_DMR1_CW6])
1543 
                2'b00: wp[6] = match6;
1544 
                2'b01: wp[6] = match6 & wp[5];
1545 
                2'b10: wp[6] = match6 | wp[5];
1546 
                2'b11: wp[6] = 1'b0;
1547 
        endcase
1548 
 
1549 
//
1550 
// Compare To What (Match Condition 7)
1551 
//
1552 
always @(dcr7 or id_pc or dcpu_adr_i or dcpu_dat_dc
1553 
        or dcpu_dat_lsu or dcpu_we_i)
1554 
        case (dcr7[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1555 
                3'b001: match_cond7_ct = id_pc;         // insn fetch EA
1556 
                3'b010: match_cond7_ct = dcpu_adr_i;    // load EA
1557 
                3'b011: match_cond7_ct = dcpu_adr_i;    // store EA
1558 
                3'b100: match_cond7_ct = dcpu_dat_dc;   // load data
1559 
                3'b101: match_cond7_ct = dcpu_dat_lsu;  // store data
1560 
                3'b110: match_cond7_ct = dcpu_adr_i;    // load/store EA
1561 
                default:match_cond7_ct = dcpu_we_i ? dcpu_dat_lsu : dcpu_dat_dc;
1562 
        endcase
1563 
 
1564 
//
1565 
// When To Compare (Match Condition 7)
1566 
//
1567 
always @(dcr7 or dcpu_cycstb_i)
1568 
        case (dcr7[`OR1200_DU_DCR_CT])          // synopsys parallel_case
1569 
                3'b000: match_cond7_stb = 1'b0;         //comparison disabled
1570 
                3'b001: match_cond7_stb = 1'b1;         // insn fetch EA
1571 
                default:match_cond7_stb = dcpu_cycstb_i; // any load/store
1572 
        endcase
1573 
 
1574 
//
1575 
// Match Condition 7
1576 
//
1577 
always @(match_cond7_stb or dcr7 or dvr7 or match_cond7_ct)
1578 
        casex ({match_cond7_stb, dcr7[`OR1200_DU_DCR_CC]})
1579 
                4'b0_xxx,
1580 
                4'b1_000,
1581 
                4'b1_111: match7 = 1'b0;
1582 
                4'b1_001: match7 =
1583 141 marcus.erl 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} ==
1584 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1585 10 unneback 
                4'b1_010: match7 =
1586 141 marcus.erl 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} <
1587 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1588 10 unneback 
                4'b1_011: match7 =
1589 141 marcus.erl 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} <=
1590 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1591 10 unneback 
                4'b1_100: match7 =
1592 141 marcus.erl 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} >
1593 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1594 10 unneback 
                4'b1_101: match7 =
1595 141 marcus.erl 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} >=
1596 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1597 10 unneback 
                4'b1_110: match7 =
1598 141 marcus.erl 
                        ({(match_cond7_ct[31] ^ dcr7[`OR1200_DU_DCR_SC]), match_cond7_ct[30:0]} !=
1599 
                         {(dvr7[31] ^ dcr7[`OR1200_DU_DCR_SC]), dvr7[30:0]});
1600 10 unneback 
        endcase
1601 
 
1602 
//
1603 
// Watchpoint 7
1604 
//
1605 
always @(dmr1 or match7 or wp)
1606 
        case (dmr1[`OR1200_DU_DMR1_CW7])
1607 
                2'b00: wp[7] = match7;
1608 
                2'b01: wp[7] = match7 & wp[6];
1609 
                2'b10: wp[7] = match7 | wp[6];
1610 
                2'b11: wp[7] = 1'b0;
1611 
        endcase
1612 
 
1613 
//
1614 
// Increment Watchpoint Counter 0
1615 
//
1616 
always @(wp or dmr2)
1617 
        if (dmr2[`OR1200_DU_DMR2_WCE0])
1618 
                incr_wpcntr0 = |(wp & ~dmr2[`OR1200_DU_DMR2_AWTC]);
1619 
        else
1620 
                incr_wpcntr0 = 1'b0;
1621 
 
1622 
//
1623 
// Match Condition Watchpoint Counter 0
1624 
//
1625 
always @(dwcr0)
1626 
        if (dwcr0[`OR1200_DU_DWCR_MATCH] == dwcr0[`OR1200_DU_DWCR_COUNT])
1627 
                wpcntr0_match = 1'b1;
1628 
        else
1629 
                wpcntr0_match = 1'b0;
1630 
 
1631 
 
1632 
//
1633 
// Watchpoint 8
1634 
//
1635 
always @(dmr1 or wpcntr0_match or wp)
1636 
        case (dmr1[`OR1200_DU_DMR1_CW8])
1637 
                2'b00: wp[8] = wpcntr0_match;
1638 
                2'b01: wp[8] = wpcntr0_match & wp[7];
1639 
                2'b10: wp[8] = wpcntr0_match | wp[7];
1640 
                2'b11: wp[8] = 1'b0;
1641 
        endcase
1642 
 
1643 
 
1644 
//
1645 
// Increment Watchpoint Counter 1
1646 
//
1647 
always @(wp or dmr2)
1648 
        if (dmr2[`OR1200_DU_DMR2_WCE1])
1649 
                incr_wpcntr1 = |(wp & dmr2[`OR1200_DU_DMR2_AWTC]);
1650 
        else
1651 
                incr_wpcntr1 = 1'b0;
1652 
 
1653 
//
1654 
// Match Condition Watchpoint Counter 1
1655 
//
1656 
always @(dwcr1)
1657 
        if (dwcr1[`OR1200_DU_DWCR_MATCH] == dwcr1[`OR1200_DU_DWCR_COUNT])
1658 
                wpcntr1_match = 1'b1;
1659 
        else
1660 
                wpcntr1_match = 1'b0;
1661 
 
1662 
//
1663 
// Watchpoint 9
1664 
//
1665 
always @(dmr1 or wpcntr1_match or wp)
1666 
        case (dmr1[`OR1200_DU_DMR1_CW9])
1667 
                2'b00: wp[9] = wpcntr1_match;
1668 
                2'b01: wp[9] = wpcntr1_match & wp[8];
1669 
                2'b10: wp[9] = wpcntr1_match | wp[8];
1670 
                2'b11: wp[9] = 1'b0;
1671 
        endcase
1672 
 
1673 
//
1674 
// Watchpoint 10
1675 
//
1676 
always @(dmr1 or dbg_ewt_i or wp)
1677 
        case (dmr1[`OR1200_DU_DMR1_CW10])
1678 
                2'b00: wp[10] = dbg_ewt_i;
1679 
                2'b01: wp[10] = dbg_ewt_i & wp[9];
1680 
                2'b10: wp[10] = dbg_ewt_i | wp[9];
1681 
                2'b11: wp[10] = 1'b0;
1682 
        endcase
1683 
 
1684 
`endif
1685 
 
1686 
//
1687 
// Watchpoints can cause trap exception
1688 
//
1689 
`ifdef OR1200_DU_HWBKPTS
1690 141 marcus.erl 
assign du_hwbkpt = |(wp & dmr2[`OR1200_DU_DMR2_WGB]) | du_hwbkpt_hold | (dbg_bp_r & ~dsr[`OR1200_DU_DSR_TE]);
1691 10 unneback 
`else
1692 
assign du_hwbkpt = 1'b0;
1693 
`endif
1694 
 
1695 141 marcus.erl 
// Hold du_hwbkpt if ex_freeze is active in order to cause trap exception
1696 
always @(posedge clk or posedge rst)
1697 
        if (rst)
1698 
                du_hwbkpt_hold <= #1 1'b0;
1699 
        else if (du_hwbkpt & ex_freeze)
1700 
                du_hwbkpt_hold <= #1 1'b1;
1701 
        else if (!ex_freeze)
1702 
                du_hwbkpt_hold <= #1 1'b0;
1703 
 
1704 10 unneback 
`ifdef OR1200_DU_TB_IMPLEMENTED
1705 
//
1706 
// Simple trace buffer
1707 
// (right now hardcoded for Xilinx Virtex FPGAs)
1708 
//
1709 
// Stores last 256 instruction addresses, instruction
1710 
// machine words and ALU results
1711 
//
1712 
 
1713 
//
1714 
// Trace buffer write enable
1715 
//
1716 
assign tb_enw = ~ex_freeze & ~((ex_insn[31:26] == `OR1200_OR32_NOP) & ex_insn[16]);
1717 
 
1718 
//
1719 
// Trace buffer write address pointer
1720 
//
1721 
always @(posedge clk or posedge rst)
1722 
        if (rst)
1723 
                tb_wadr <= #1 8'h00;
1724 
        else if (tb_enw)
1725 
                tb_wadr <= #1 tb_wadr + 8'd1;
1726 
 
1727 
//
1728 
// Free running counter (time stamp)
1729 
//
1730 
always @(posedge clk or posedge rst)
1731 
        if (rst)
1732 
                tb_timstmp <= #1 32'h00000000;
1733 
        else if (!dbg_bp_r)
1734 
                tb_timstmp <= #1 tb_timstmp + 32'd1;
1735 
 
1736 
//
1737 
// Trace buffer RAMs
1738 
//
1739 
 
1740 
or1200_dpram_256x32 tbia_ram(
1741 
        .clk_a(clk),
1742 141 marcus.erl 
        .rst_a(1'b0),
1743 10 unneback 
        .addr_a(spr_addr[7:0]),
1744 
        .ce_a(1'b1),
1745 
        .oe_a(1'b1),
1746 
        .do_a(tbia_dat_o),
1747 
 
1748 
        .clk_b(clk),
1749 141 marcus.erl 
        .rst_b(1'b0),
1750 10 unneback 
        .addr_b(tb_wadr),
1751 
        .di_b(spr_dat_npc),
1752 
        .ce_b(1'b1),
1753 
        .we_b(tb_enw)
1754 
 
1755 
);
1756 
 
1757 
or1200_dpram_256x32 tbim_ram(
1758 
        .clk_a(clk),
1759 141 marcus.erl 
        .rst_a(1'b0),
1760 10 unneback 
        .addr_a(spr_addr[7:0]),
1761 
        .ce_a(1'b1),
1762 
        .oe_a(1'b1),
1763 
        .do_a(tbim_dat_o),
1764 
 
1765 
        .clk_b(clk),
1766 141 marcus.erl 
        .rst_b(1'b0),
1767 10 unneback 
        .addr_b(tb_wadr),
1768 
        .di_b(ex_insn),
1769 
        .ce_b(1'b1),
1770 
        .we_b(tb_enw)
1771 
);
1772 
 
1773 
or1200_dpram_256x32 tbar_ram(
1774 
        .clk_a(clk),
1775 141 marcus.erl 
        .rst_a(1'b0),
1776 10 unneback 
        .addr_a(spr_addr[7:0]),
1777 
        .ce_a(1'b1),
1778 
        .oe_a(1'b1),
1779 
        .do_a(tbar_dat_o),
1780 
 
1781 
        .clk_b(clk),
1782 141 marcus.erl 
        .rst_b(1'b0),
1783 10 unneback 
        .addr_b(tb_wadr),
1784 
        .di_b(rf_dataw),
1785 
        .ce_b(1'b1),
1786 
        .we_b(tb_enw)
1787 
);
1788 
 
1789 
or1200_dpram_256x32 tbts_ram(
1790 
        .clk_a(clk),
1791 141 marcus.erl 
        .rst_a(1'b0),
1792 10 unneback 
        .addr_a(spr_addr[7:0]),
1793 
        .ce_a(1'b1),
1794 
        .oe_a(1'b1),
1795 
        .do_a(tbts_dat_o),
1796 
 
1797 
        .clk_b(clk),
1798 141 marcus.erl 
        .rst_b(1'b0),
1799 10 unneback 
        .addr_b(tb_wadr),
1800 
        .di_b(tb_timstmp),
1801 
        .ce_b(1'b1),
1802 
        .we_b(tb_enw)
1803 
);
1804 
 
1805 
`else
1806 
 
1807 
assign tbia_dat_o = 32'h0000_0000;
1808 
assign tbim_dat_o = 32'h0000_0000;
1809 
assign tbar_dat_o = 32'h0000_0000;
1810 
assign tbts_dat_o = 32'h0000_0000;
1811 
 
1812 
`endif  // OR1200_DU_TB_IMPLEMENTED
1813 
 
1814 
`else   // OR1200_DU_IMPLEMENTED
1815 
 
1816 
//
1817 
// When DU is not implemented, drive all outputs as would when DU is disabled
1818 
//
1819 
assign dbg_bp_o = 1'b0;
1820 
assign du_dsr = {`OR1200_DU_DSR_WIDTH{1'b0}};
1821 141 marcus.erl 
assign du_dmr1 = {25{1'b0}};
1822 10 unneback 
assign du_hwbkpt = 1'b0;
1823 
 
1824 
//
1825 
// Read DU registers
1826 
//
1827 
`ifdef OR1200_DU_READREGS
1828 
assign spr_dat_o = 32'h0000_0000;
1829 
`ifdef OR1200_DU_UNUSED_ZERO
1830 
`endif
1831 
`endif
1832 
 
1833 
`endif
1834 
 
1835 
endmodule

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