Select one of the symbols to view example projects that use it.
 
Outline
#include "config.h"
#include "arm.h"
#include "arm_adi_v5.h"
#include <helper/time_support.h>
#include <helper/list.h>
#include <jtag/swd.h>
#define JTAG_DP_ABORT
#define JTAG_DP_DPACC
#define JTAG_DP_APACC
#define JTAG_DP_IDCODE
#define JTAG_ACK_WAIT
#define JTAG_ACK_OK_FAULT
#define JTAG_ACK_FAULT
#define JTAG_ACK_OK
dap_cmd
#define MAX_DAP_COMMAND_NUM
dap_cmd_pool
log_dap_cmd(struct adiv5_dap *, const char *, struct dap_cmd *)
jtag_limit_queue_size(struct adiv5_dap *)
dap_cmd_new(struct adiv5_dap *, uint8_t, uint16_t, uint8_t, uint8_t *, uint8_t *, uint32_t)
dap_cmd_release(struct adiv5_dap *, struct dap_cmd *)
flush_journal(struct adiv5_dap *, struct list_head *)
jtag_quit(struct adiv5_dap *)
adi_jtag_dp_scan_cmd(struct adiv5_dap *, struct dap_cmd *, uint8_t *)
adi_jtag_dp_scan_cmd_sync(struct adiv5_dap *, struct dap_cmd *, uint8_t *)
adi_jtag_dp_scan(struct adiv5_dap *, uint8_t, uint16_t, uint8_t, uint8_t *, uint8_t *, uint32_t, uint8_t *)
adi_jtag_dp_scan_u32(struct adiv5_dap *, uint8_t, uint16_t, uint8_t, uint32_t, uint32_t *, uint32_t, uint8_t *)
adi_jtag_finish_read(struct adiv5_dap *)
adi_jtag_scan_inout_check_u32(struct adiv5_dap *, uint8_t, uint16_t, uint8_t, uint32_t, uint32_t *, uint32_t)
jtagdp_overrun_check(struct adiv5_dap *)
jtagdp_transaction_endcheck(struct adiv5_dap *)
jtag_connect(struct adiv5_dap *)
jtag_check_reconnect(struct adiv5_dap *)
jtag_send_sequence(struct adiv5_dap *, enum swd_special_seq)
jtag_dp_q_read(struct adiv5_dap *, unsigned int, uint32_t *)
jtag_dp_q_write(struct adiv5_dap *, unsigned int, uint32_t)
jtag_ap_q_bankselect(struct adiv5_ap *, unsigned int)
jtag_ap_q_read(struct adiv5_ap *, unsigned int, uint32_t *)
jtag_ap_q_write(struct adiv5_ap *, unsigned int, uint32_t)
jtag_ap_q_abort(struct adiv5_dap *, uint8_t *)
jtag_dp_run(struct adiv5_dap *)
jtag_dp_sync(struct adiv5_dap *)
jtag_dp_ops
Files
loading...
SourceVuDevelopment ToolsOpenOCDsrc/target/adi_v5_jtag.c
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
// SPDX-License-Identifier: GPL-2.0-or-later /*************************************************************************** * Copyright (C) 2006 by Magnus Lundin * lundin@mlu.mine.nu * * Copyright (C) 2008 by Spencer Oliver * spen@spen-soft.co.uk * * Copyright (C) 2009 by Oyvind Harboe * oyvind.harboe@zylin.com * * Copyright (C) 2009-2010 by David Brownell * * Copyright (C) 2020-2021, Ampere Computing LLC * ***************************************************************************//* ... */ /** * @file * This file implements JTAG transport support for cores implementing the ARM Debug Interface version 5 (ADIv5) and version 6 (ADIv6). *//* ... */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "arm.h" #include "arm_adi_v5.h" #include <helper/time_support.h> #include <helper/list.h> #include <jtag/swd.h> 5 includes /*#define DEBUG_WAIT*/ /* JTAG instructions/registers for JTAG-DP and SWJ-DP */ #define JTAG_DP_ABORT 0xF8 #define JTAG_DP_DPACC 0xFA #define JTAG_DP_APACC 0xFB #define JTAG_DP_IDCODE 0xFE /* three-bit ACK values for DPACC and APACC reads */ #define JTAG_ACK_WAIT 0x1 /* ADIv5 and ADIv6 */ #define JTAG_ACK_OK_FAULT 0x2 /* ADIv5 */ #define JTAG_ACK_FAULT 0x2 /* ADIv6 */ #define JTAG_ACK_OK 0x4 /* ADIV6 */ 8 defines static int jtag_ap_q_abort(struct adiv5_dap *dap, uint8_t *ack); #ifdef DEBUG_WAIT static const char *dap_reg_name(struct adiv5_dap *dap, uint8_t instr, uint16_t reg_addr) { char *reg_name = "UNK"; if (instr == JTAG_DP_DPACC) { switch (reg_addr) { case DP_ABORT: reg_name = "ABORT"; break;case DP_ABORT: case DP_CTRL_STAT: reg_name = "CTRL/STAT"; break;case DP_CTRL_STAT: case DP_SELECT: reg_name = "SELECT"; break;case DP_SELECT: case DP_RDBUFF: reg_name = "RDBUFF"; break;case DP_RDBUFF: case DP_DLCR: reg_name = "DLCR"; break;case DP_DLCR: default: reg_name = "UNK"; break;default }switch (reg_addr) { ... } }if (instr == JTAG_DP_DPACC) { ... } if (instr == JTAG_DP_APACC) { if (reg_addr == MEM_AP_REG_CSW(dap)) reg_name = "CSW"; else if (reg_addr == MEM_AP_REG_TAR(dap)) reg_name = "TAR"; else if (reg_addr == MEM_AP_REG_TAR64(dap)) reg_name = "TAR64"; else if (reg_addr == MEM_AP_REG_DRW(dap)) reg_name = "DRW"; else if (reg_addr == MEM_AP_REG_BD0(dap)) reg_name = "BD0"; else if (reg_addr == MEM_AP_REG_BD1(dap)) reg_name = "BD1"; else if (reg_addr == MEM_AP_REG_BD2(dap)) reg_name = "BD2"; else if (reg_addr == MEM_AP_REG_BD3(dap)) reg_name = "BD3"; else if (reg_addr == MEM_AP_REG_CFG(dap)) reg_name = "CFG"; else if (reg_addr == MEM_AP_REG_BASE(dap)) reg_name = "BASE"; else if (reg_addr == MEM_AP_REG_BASE64(dap)) reg_name = "BASE64"; else if (reg_addr == AP_REG_IDR(dap)) reg_name = "IDR"; else reg_name = "UNK"; }if (instr == JTAG_DP_APACC) { ... } return reg_name; }dap_reg_name (struct adiv5_dap *dap, uint8_t instr, uint16_t reg_addr) { ... } /* ... */#endif struct dap_cmd { struct list_head lh; uint8_t instr; uint16_t reg_addr; uint8_t rnw; uint8_t *invalue; uint8_t ack; uint32_t memaccess_tck; uint64_t dp_select; struct scan_field fields[2]; uint8_t out_addr_buf; uint8_t invalue_buf[4]; uint8_t outvalue_buf[4]; ...}; #define MAX_DAP_COMMAND_NUM 65536 struct dap_cmd_pool { struct list_head lh; struct dap_cmd cmd; ...}; static void log_dap_cmd(struct adiv5_dap *dap, const char *header, struct dap_cmd *el) { #ifdef DEBUG_WAIT const char *ack; switch (el->ack) { case JTAG_ACK_WAIT: /* ADIv5 and ADIv6 */ ack = "WAIT"; break;case JTAG_ACK_WAIT: case JTAG_ACK_OK_FAULT: /* ADIv5, same value as JTAG_ACK_FAULT */ /* case JTAG_ACK_FAULT: */ /* ADIv6 */ if (is_adiv6(dap)) ack = "FAULT"; else ack = "OK"; break;case JTAG_ACK_OK_FAULT: case JTAG_ACK_OK: /* ADIv6 */ if (is_adiv6(dap)) { ack = "OK"; break; }if (is_adiv6(dap)) { ... } /* fall-through */case JTAG_ACK_OK: default: ack = "INVAL"; break;default }switch (el->ack) { ... } LOG_DEBUG("%s: %2s %6s %5s 0x%08x 0x%08x %2s", header, el->instr == JTAG_DP_APACC ? "AP" : "DP", dap_reg_name(dap, el->instr, el->reg_addr), el->rnw == DPAP_READ ? "READ" : "WRITE", buf_get_u32(el->outvalue_buf, 0, 32), buf_get_u32(el->invalue, 0, 32), ack);/* ... */ #endif }{ ... } static int jtag_limit_queue_size(struct adiv5_dap *dap) { if (dap->cmd_pool_size < MAX_DAP_COMMAND_NUM) return ERROR_OK; return dap_run(dap); }{ ... } static struct dap_cmd *dap_cmd_new(struct adiv5_dap *dap, uint8_t instr, uint16_t reg_addr, uint8_t rnw, uint8_t *outvalue, uint8_t *invalue, uint32_t memaccess_tck) { struct dap_cmd_pool *pool = NULL; if (list_empty(&dap->cmd_pool)) { pool = calloc(1, sizeof(struct dap_cmd_pool)); if (!pool) return NULL; }if (list_empty(&dap->cmd_pool)) { ... } else { pool = list_first_entry(&dap->cmd_pool, struct dap_cmd_pool, lh); list_del(&pool->lh); }else { ... } INIT_LIST_HEAD(&pool->lh); dap->cmd_pool_size++; struct dap_cmd *cmd = &pool->cmd; INIT_LIST_HEAD(&cmd->lh); cmd->instr = instr; cmd->reg_addr = reg_addr; cmd->rnw = rnw; if (outvalue) memcpy(cmd->outvalue_buf, outvalue, 4); cmd->invalue = (invalue) ? invalue : cmd->invalue_buf; cmd->memaccess_tck = memaccess_tck; return cmd; }{ ... } static void dap_cmd_release(struct adiv5_dap *dap, struct dap_cmd *cmd) { struct dap_cmd_pool *pool = container_of(cmd, struct dap_cmd_pool, cmd); if (dap->cmd_pool_size > MAX_DAP_COMMAND_NUM) free(pool); else list_add(&pool->lh, &dap->cmd_pool); dap->cmd_pool_size--; }{ ... } static void flush_journal(struct adiv5_dap *dap, struct list_head *lh) { struct dap_cmd *el, *tmp; list_for_each_entry_safe(el, tmp, lh, lh) { list_del(&el->lh); dap_cmd_release(dap, el); }list_for_each_entry_safe (el, tmp, lh, lh) { ... } }{ ... } static void jtag_quit(struct adiv5_dap *dap) { struct dap_cmd_pool *el, *tmp; struct list_head *lh = &dap->cmd_pool; list_for_each_entry_safe(el, tmp, lh, lh) { list_del(&el->lh); free(el); }list_for_each_entry_safe (el, tmp, lh, lh) { ... } }{ ... } /*************************************************************************** * * DPACC and APACC scanchain access through JTAG-DP (or SWJ-DP) * ***************************************************************************//* ... */ static int adi_jtag_dp_scan_cmd(struct adiv5_dap *dap, struct dap_cmd *cmd, uint8_t *ack) { struct jtag_tap *tap = dap->tap; int retval; retval = arm_jtag_set_instr(tap, cmd->instr, NULL, TAP_IDLE); if (retval != ERROR_OK) return retval; /* Scan out a read or write operation using some DP or AP register. * For APACC access with any sticky error flag set, this is discarded. *//* ... */ cmd->fields[0].num_bits = 3; buf_set_u32(&cmd->out_addr_buf, 0, 3, ((cmd->reg_addr >> 1) & 0x6) | (cmd->rnw & 0x1)); cmd->fields[0].out_value = &cmd->out_addr_buf; cmd->fields[0].in_value = (ack) ? ack : &cmd->ack; /* NOTE: if we receive JTAG_ACK_WAIT, the previous operation did not * complete; data we write is discarded, data we read is unpredictable. * When overrun detect is active, STICKYORUN is set. *//* ... */ cmd->fields[1].num_bits = 32; cmd->fields[1].out_value = cmd->outvalue_buf; cmd->fields[1].in_value = cmd->invalue; jtag_add_dr_scan(tap, 2, cmd->fields, TAP_IDLE); /* Add specified number of tck clocks after starting AP register * access or memory bus access, giving the hardware time to complete * the access. * They provide more time for the (MEM) AP to complete the read ... * See "Minimum Response Time" for JTAG-DP, in the ADIv5/ADIv6 spec. *//* ... */ if (cmd->instr == JTAG_DP_APACC && cmd->memaccess_tck != 0) jtag_add_runtest(cmd->memaccess_tck, TAP_IDLE); return ERROR_OK; }{ ... } static int adi_jtag_dp_scan_cmd_sync(struct adiv5_dap *dap, struct dap_cmd *cmd, uint8_t *ack) { int retval; retval = adi_jtag_dp_scan_cmd(dap, cmd, ack); if (retval != ERROR_OK) return retval; return jtag_execute_queue(); }{ ... } /** * Scan DPACC or APACC using target ordered uint8_t buffers. No endianness * conversions are performed. See section 4.4.3 of the ADIv5/ADIv6 spec, which * discusses operations which access these registers. * * Note that only one scan is performed. If rnw is set, a separate scan * will be needed to collect the data which was read; the "invalue" collects * the posted result of a preceding operation, not the current one. * * @param dap the DAP * @param instr JTAG_DP_APACC (AP access) or JTAG_DP_DPACC (DP access) * @param reg_addr two significant bits; A[3:2]; for APACC access, the * SELECT register has more addressing bits. * @param rnw false iff outvalue will be written to the DP or AP * @param outvalue points to a 32-bit (little-endian) integer * @param invalue NULL, or points to a 32-bit (little-endian) integer * @param ack points to where the three bit JTAG_ACK_* code will be stored * @param memaccess_tck number of idle cycles to add after AP access *//* ... */ static int adi_jtag_dp_scan(struct adiv5_dap *dap, uint8_t instr, uint16_t reg_addr, uint8_t rnw, uint8_t *outvalue, uint8_t *invalue, uint32_t memaccess_tck, uint8_t *ack) { struct dap_cmd *cmd; int retval; cmd = dap_cmd_new(dap, instr, reg_addr, rnw, outvalue, invalue, memaccess_tck); if (cmd) cmd->dp_select = dap->select; else return ERROR_JTAG_DEVICE_ERROR; retval = adi_jtag_dp_scan_cmd(dap, cmd, ack); if (retval == ERROR_OK) list_add_tail(&cmd->lh, &dap->cmd_journal); return retval; }{ ... } /** * Scan DPACC or APACC out and in from host ordered uint32_t buffers. * This is exactly like adi_jtag_dp_scan(), except that endianness * conversions are performed (so the types of invalue and outvalue * must be different). *//* ... */ static int adi_jtag_dp_scan_u32(struct adiv5_dap *dap, uint8_t instr, uint16_t reg_addr, uint8_t rnw, uint32_t outvalue, uint32_t *invalue, uint32_t memaccess_tck, uint8_t *ack) { uint8_t out_value_buf[4]; int retval; uint64_t sel = (reg_addr >> 4) & DP_SELECT_DPBANK; /* No need to change SELECT or RDBUFF as they are not banked */ if (instr == JTAG_DP_DPACC && reg_addr != DP_SELECT && reg_addr != DP_RDBUFF && (!dap->select_valid || sel != (dap->select & DP_SELECT_DPBANK))) { /* Use the AP part of dap->select regardless of dap->select_valid: * if !dap->select_valid * dap->select contains a speculative value likely going to be used * in the following swd_queue_ap_bankselect() *//* ... */ sel |= dap->select & SELECT_AP_MASK; LOG_DEBUG_IO("DP BANK SELECT: %" PRIx32, (uint32_t)sel); buf_set_u32(out_value_buf, 0, 32, (uint32_t)sel); retval = adi_jtag_dp_scan(dap, JTAG_DP_DPACC, DP_SELECT, DPAP_WRITE, out_value_buf, NULL, 0, NULL); if (retval != ERROR_OK) return retval; dap->select = sel; dap->select_valid = true; }if (instr == JTAG_DP_DPACC && reg_addr != DP_SELECT && reg_addr != DP_RDBUFF && (!dap->select_valid || sel != (dap->select & DP_SELECT_DPBANK))) { ... } buf_set_u32(out_value_buf, 0, 32, outvalue); retval = adi_jtag_dp_scan(dap, instr, reg_addr, rnw, out_value_buf, (uint8_t *)invalue, memaccess_tck, ack); if (retval != ERROR_OK) return retval; if (invalue) jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t) invalue); return retval; }{ ... } static int adi_jtag_finish_read(struct adiv5_dap *dap) { int retval = ERROR_OK; if (dap->last_read) { retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC, DP_RDBUFF, DPAP_READ, 0, dap->last_read, 0, NULL); dap->last_read = NULL; }if (dap->last_read) { ... } return retval; }{ ... } static int adi_jtag_scan_inout_check_u32(struct adiv5_dap *dap, uint8_t instr, uint16_t reg_addr, uint8_t rnw, uint32_t outvalue, uint32_t *invalue, uint32_t memaccess_tck) { int retval; /* Issue the read or write */ retval = adi_jtag_dp_scan_u32(dap, instr, reg_addr, rnw, outvalue, NULL, memaccess_tck, NULL); if (retval != ERROR_OK) return retval; /* For reads, collect posted value; RDBUFF has no other effect. * Assumes read gets acked with OK/FAULT, and CTRL_STAT says "OK". *//* ... */ if ((rnw == DPAP_READ) && (invalue)) { retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC, DP_RDBUFF, DPAP_READ, 0, invalue, 0, NULL); if (retval != ERROR_OK) return retval; }if ((rnw == DPAP_READ) && (invalue)) { ... } return jtag_execute_queue(); }{ ... } static int jtagdp_overrun_check(struct adiv5_dap *dap) { int retval; struct dap_cmd *el, *tmp, *prev = NULL; int found_wait = 0; int64_t time_now; LIST_HEAD(replay_list); /* make sure all queued transactions are complete */ retval = jtag_execute_queue(); if (retval != ERROR_OK) goto done; /* skip all completed transactions up to the first WAIT */ list_for_each_entry(el, &dap->cmd_journal, lh) { /* * JTAG_ACK_OK_FAULT (ADIv5) and JTAG_ACK_FAULT (ADIv6) are equal so * the following statement is checking to see if an acknowledgment of * OK or FAULT is generated for ADIv5 or ADIv6 *//* ... */ if (el->ack == JTAG_ACK_OK_FAULT || (is_adiv6(dap) && el->ack == JTAG_ACK_OK)) { log_dap_cmd(dap, "LOG", el); }if (el->ack == JTAG_ACK_OK_FAULT || (is_adiv6(dap) && el->ack == JTAG_ACK_OK)) { ... } else if (el->ack == JTAG_ACK_WAIT) { found_wait = 1; break; }else if (el->ack == JTAG_ACK_WAIT) { ... } else { LOG_ERROR("Invalid ACK (%1x) in DAP response", el->ack); log_dap_cmd(dap, "ERR", el); retval = ERROR_JTAG_DEVICE_ERROR; goto done; }else { ... } }list_for_each_entry (el, &dap->cmd_journal, lh) { ... } /* * If we found a stalled transaction and a previous transaction * exists, check if it's a READ access. *//* ... */ if (found_wait && el != list_first_entry(&dap->cmd_journal, struct dap_cmd, lh)) { prev = list_entry(el->lh.prev, struct dap_cmd, lh); if (prev->rnw == DPAP_READ) { log_dap_cmd(dap, "PND", prev); /* search for the next OK transaction, it contains * the result of the previous READ *//* ... */ tmp = el; list_for_each_entry_from(tmp, &dap->cmd_journal, lh) { /* The following check covers OK and FAULT ACKs for both ADIv5 and ADIv6 */ if (tmp->ack == JTAG_ACK_OK_FAULT || (is_adiv6(dap) && tmp->ack == JTAG_ACK_OK)) { /* recover the read value */ log_dap_cmd(dap, "FND", tmp); if (el->invalue != el->invalue_buf) { uint32_t invalue = le_to_h_u32(tmp->invalue); memcpy(el->invalue, &invalue, sizeof(uint32_t)); }if (el->invalue != el->invalue_buf) { ... } prev = NULL; break; }if (tmp->ack == JTAG_ACK_OK_FAULT || (is_adiv6(dap) && tmp->ack == JTAG_ACK_OK)) { ... } }list_for_each_entry_from (tmp, &dap->cmd_journal, lh) { ... } if (prev) { log_dap_cmd(dap, "LST", el); /* * At this point we're sure that no previous * transaction completed and the DAP/AP is still * in busy state. We know that the next "OK" scan * will return the READ result we need to recover. * To complete the READ, we just keep polling RDBUFF * until the WAIT condition clears *//* ... */ tmp = dap_cmd_new(dap, JTAG_DP_DPACC, DP_RDBUFF, DPAP_READ, NULL, NULL, 0); if (!tmp) { retval = ERROR_JTAG_DEVICE_ERROR; goto done; }if (!tmp) { ... } /* synchronously retry the command until it succeeds */ time_now = timeval_ms(); do { retval = adi_jtag_dp_scan_cmd_sync(dap, tmp, NULL); if (retval != ERROR_OK) break; /* The following check covers OK and FAULT ACKs for both ADIv5 and ADIv6 */ if (tmp->ack == JTAG_ACK_OK_FAULT || (is_adiv6(dap) && tmp->ack == JTAG_ACK_OK)) { log_dap_cmd(dap, "FND", tmp); if (el->invalue != el->invalue_buf) { uint32_t invalue = le_to_h_u32(tmp->invalue); memcpy(el->invalue, &invalue, sizeof(uint32_t)); }if (el->invalue != el->invalue_buf) { ... } break; }if (tmp->ack == JTAG_ACK_OK_FAULT || (is_adiv6(dap) && tmp->ack == JTAG_ACK_OK)) { ... } if (tmp->ack != JTAG_ACK_WAIT) { LOG_ERROR("Invalid ACK (%1x) in DAP response", tmp->ack); log_dap_cmd(dap, "ERR", tmp); retval = ERROR_JTAG_DEVICE_ERROR; break; }if (tmp->ack != JTAG_ACK_WAIT) { ... } ...} while (timeval_ms() - time_now < 1000); if (retval == ERROR_OK) { /* timeout happened */ if (tmp->ack == JTAG_ACK_WAIT) { LOG_ERROR("Timeout during WAIT recovery"); dap->select_valid = false; dap->select1_valid = false; /* Keep dap->select unchanged, the same AP and AP bank * is likely going to be used further *//* ... */ jtag_ap_q_abort(dap, NULL); /* clear the sticky overrun condition */ adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC, DP_CTRL_STAT, DPAP_WRITE, dap->dp_ctrl_stat | SSTICKYORUN, NULL, 0); retval = ERROR_JTAG_DEVICE_ERROR; }if (tmp->ack == JTAG_ACK_WAIT) { ... } }if (retval == ERROR_OK) { ... } /* we're done with this command, release it */ dap_cmd_release(dap, tmp); if (retval != ERROR_OK) goto done; }if (prev) { ... } /* make el->invalue point to the default invalue * so that we can safely retry it without clobbering * the result we just recovered *//* ... */ el->invalue = el->invalue_buf; }if (prev->rnw == DPAP_READ) { ... } }if (found_wait && el != list_first_entry(&dap->cmd_journal, struct dap_cmd, lh)) { ... } /* move all remaining transactions over to the replay list */ list_for_each_entry_safe_from(el, tmp, &dap->cmd_journal, lh) { log_dap_cmd(dap, "REP", el); list_move_tail(&el->lh, &replay_list); }list_for_each_entry_safe_from (el, tmp, &dap->cmd_journal, lh) { ... } /* we're done with the journal, flush it */ flush_journal(dap, &dap->cmd_journal); /* check for overrun condition in the last batch of transactions */ if (found_wait) { LOG_INFO("DAP transaction stalled (WAIT) - slowing down and resending"); /* clear the sticky overrun condition */ retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC, DP_CTRL_STAT, DPAP_WRITE, dap->dp_ctrl_stat | SSTICKYORUN, NULL, 0); if (retval != ERROR_OK) goto done; /* restore SELECT register first */ if (!list_empty(&replay_list)) { el = list_first_entry(&replay_list, struct dap_cmd, lh); uint8_t out_value_buf[4]; buf_set_u32(out_value_buf, 0, 32, (uint32_t)(el->dp_select)); tmp = dap_cmd_new(dap, JTAG_DP_DPACC, DP_SELECT, DPAP_WRITE, out_value_buf, NULL, 0); if (!tmp) { retval = ERROR_JTAG_DEVICE_ERROR; goto done; }if (!tmp) { ... } list_add(&tmp->lh, &replay_list); /* TODO: ADIv6 DP SELECT1 handling */ dap->select_valid = false; }if (!list_empty(&replay_list)) { ... } list_for_each_entry_safe(el, tmp, &replay_list, lh) { time_now = timeval_ms(); do { retval = adi_jtag_dp_scan_cmd_sync(dap, el, NULL); if (retval != ERROR_OK) break; log_dap_cmd(dap, "REC", el); if (el->ack == JTAG_ACK_OK_FAULT || (is_adiv6(dap) && el->ack == JTAG_ACK_OK)) { if (el->invalue != el->invalue_buf) { uint32_t invalue = le_to_h_u32(el->invalue); memcpy(el->invalue, &invalue, sizeof(uint32_t)); }if (el->invalue != el->invalue_buf) { ... } break; }if (el->ack == JTAG_ACK_OK_FAULT || (is_adiv6(dap) && el->ack == JTAG_ACK_OK)) { ... } if (el->ack != JTAG_ACK_WAIT) { LOG_ERROR("Invalid ACK (%1x) in DAP response", el->ack); log_dap_cmd(dap, "ERR", el); retval = ERROR_JTAG_DEVICE_ERROR; break; }if (el->ack != JTAG_ACK_WAIT) { ... } LOG_DEBUG("DAP transaction stalled during replay (WAIT) - resending"); /* clear the sticky overrun condition */ retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC, DP_CTRL_STAT, DPAP_WRITE, dap->dp_ctrl_stat | SSTICKYORUN, NULL, 0); if (retval != ERROR_OK) break; ...} while (timeval_ms() - time_now < 1000); if (retval == ERROR_OK) { if (el->ack == JTAG_ACK_WAIT) { LOG_ERROR("Timeout during WAIT recovery"); dap->select_valid = false; dap->select1_valid = false; /* Keep dap->select unchanged, the same AP and AP bank * is likely going to be used further *//* ... */ jtag_ap_q_abort(dap, NULL); /* clear the sticky overrun condition */ adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC, DP_CTRL_STAT, DPAP_WRITE, dap->dp_ctrl_stat | SSTICKYORUN, NULL, 0); retval = ERROR_JTAG_DEVICE_ERROR; break; }if (el->ack == JTAG_ACK_WAIT) { ... } }if (retval == ERROR_OK) { ... } else break; }list_for_each_entry_safe (el, tmp, &replay_list, lh) { ... } }if (found_wait) { ... } done: flush_journal(dap, &replay_list); flush_journal(dap, &dap->cmd_journal); return retval; }{ ... } static int jtagdp_transaction_endcheck(struct adiv5_dap *dap) { int retval; uint32_t ctrlstat, pwrmask; /* too expensive to call keep_alive() here */ /* Post CTRL/STAT read; discard any previous posted read value * but collect its ACK status. *//* ... */ retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat, 0); if (retval != ERROR_OK) goto done; /* REVISIT also STICKYCMP, for pushed comparisons (nyet used) */ /* Check for STICKYERR */ if (ctrlstat & SSTICKYERR) { LOG_DEBUG("jtag-dp: CTRL/STAT 0x%" PRIx32, ctrlstat); /* Check power to debug regions */ pwrmask = CDBGPWRUPREQ | CDBGPWRUPACK | CSYSPWRUPREQ; if (!dap->ignore_syspwrupack) pwrmask |= CSYSPWRUPACK; if ((ctrlstat & pwrmask) != pwrmask) { LOG_ERROR("Debug regions are unpowered, an unexpected reset might have happened"); dap->do_reconnect = true; }if ((ctrlstat & pwrmask) != pwrmask) { ... } if (ctrlstat & SSTICKYERR) LOG_ERROR("JTAG-DP STICKY ERROR"); if (ctrlstat & SSTICKYORUN) LOG_DEBUG("JTAG-DP STICKY OVERRUN"); /* Clear Sticky Error and Sticky Overrun Bits */ retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC, DP_CTRL_STAT, DPAP_WRITE, dap->dp_ctrl_stat | SSTICKYERR | SSTICKYORUN, NULL, 0); if (retval != ERROR_OK) goto done; retval = ERROR_JTAG_DEVICE_ERROR; }if (ctrlstat & SSTICKYERR) { ... } done: flush_journal(dap, &dap->cmd_journal); return retval; }{ ... } /*--------------------------------------------------------------------------*/ static int jtag_connect(struct adiv5_dap *dap) { dap->do_reconnect = false; return dap_dp_init(dap); }{ ... } static int jtag_check_reconnect(struct adiv5_dap *dap) { if (dap->do_reconnect) return jtag_connect(dap); return ERROR_OK; }{ ... } static int jtag_send_sequence(struct adiv5_dap *dap, enum swd_special_seq seq) { int retval; switch (seq) { case JTAG_TO_SWD: retval = jtag_add_tms_seq(swd_seq_jtag_to_swd_len, swd_seq_jtag_to_swd, TAP_INVALID); break;case JTAG_TO_SWD: case SWD_TO_JTAG: retval = jtag_add_tms_seq(swd_seq_swd_to_jtag_len, swd_seq_swd_to_jtag, TAP_RESET); break;case SWD_TO_JTAG: default: LOG_ERROR("Sequence %d not supported", seq); return ERROR_FAIL;default }switch (seq) { ... } if (retval == ERROR_OK) retval = jtag_execute_queue(); return retval; }{ ... } static int jtag_dp_q_read(struct adiv5_dap *dap, unsigned reg, uint32_t *data) { int retval = jtag_limit_queue_size(dap); if (retval != ERROR_OK) return retval; retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC, reg, DPAP_READ, 0, dap->last_read, 0, NULL); dap->last_read = data; return retval; }{ ... } static int jtag_dp_q_write(struct adiv5_dap *dap, unsigned reg, uint32_t data) { int retval = jtag_limit_queue_size(dap); if (retval != ERROR_OK) return retval; retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC, reg, DPAP_WRITE, data, dap->last_read, 0, NULL); dap->last_read = NULL; return retval; }{ ... } /** Select the AP register bank */ static int jtag_ap_q_bankselect(struct adiv5_ap *ap, unsigned reg) { int retval; struct adiv5_dap *dap = ap->dap; uint64_t sel; if (is_adiv6(dap)) sel = ap->ap_num | (reg & 0x00000FF0); else sel = (ap->ap_num << 24) | (reg & ADIV5_DP_SELECT_APBANK); uint64_t sel_diff = (sel ^ dap->select) & SELECT_AP_MASK; bool set_select = !dap->select_valid || (sel_diff & 0xffffffffull); bool set_select1 = is_adiv6(dap) && dap->asize > 32 && (!dap->select1_valid || sel_diff & (0xffffffffull << 32)); if (set_select && set_select1) { /* Prepare DP bank for DP_SELECT1 now to save one write */ sel |= (DP_SELECT1 >> 4) & DP_SELECT_DPBANK; }if (set_select && set_select1) { ... } else { /* Use the DP part of dap->select regardless of dap->select_valid: * if !dap->select_valid * dap->select contains a speculative value likely going to be used * in the following swd_queue_dp_bankselect(). * Moreover dap->select_valid should never be false here as a DP bank * is always selected before selecting an AP bank *//* ... */ sel |= dap->select & DP_SELECT_DPBANK; }else { ... } if (set_select) { LOG_DEBUG_IO("AP BANK SELECT: %" PRIx32, (uint32_t)sel); retval = jtag_dp_q_write(dap, DP_SELECT, (uint32_t)sel); if (retval != ERROR_OK) { dap->select_valid = false; return retval; }if (retval != ERROR_OK) { ... } }if (set_select) { ... } if (set_select1) { LOG_DEBUG_IO("AP BANK SELECT1: %" PRIx32, (uint32_t)(sel >> 32)); retval = jtag_dp_q_write(dap, DP_SELECT1, (uint32_t)(sel >> 32)); if (retval != ERROR_OK) { dap->select1_valid = false; return retval; }if (retval != ERROR_OK) { ... } }if (set_select1) { ... } dap->select = sel; return ERROR_OK; }{ ... } static int jtag_ap_q_read(struct adiv5_ap *ap, unsigned reg, uint32_t *data) { int retval = jtag_limit_queue_size(ap->dap); if (retval != ERROR_OK) return retval; retval = jtag_check_reconnect(ap->dap); if (retval != ERROR_OK) return retval; retval = jtag_ap_q_bankselect(ap, reg); if (retval != ERROR_OK) return retval; retval = adi_jtag_dp_scan_u32(ap->dap, JTAG_DP_APACC, reg, DPAP_READ, 0, ap->dap->last_read, ap->memaccess_tck, NULL); ap->dap->last_read = data; return retval; }{ ... } static int jtag_ap_q_write(struct adiv5_ap *ap, unsigned reg, uint32_t data) { int retval = jtag_limit_queue_size(ap->dap); if (retval != ERROR_OK) return retval; retval = jtag_check_reconnect(ap->dap); if (retval != ERROR_OK) return retval; retval = jtag_ap_q_bankselect(ap, reg); if (retval != ERROR_OK) return retval; retval = adi_jtag_dp_scan_u32(ap->dap, JTAG_DP_APACC, reg, DPAP_WRITE, data, ap->dap->last_read, ap->memaccess_tck, NULL); ap->dap->last_read = NULL; return retval; }{ ... } static int jtag_ap_q_abort(struct adiv5_dap *dap, uint8_t *ack) { /* for JTAG, this is the only valid ABORT register operation */ int retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_ABORT, 0, DPAP_WRITE, 1, NULL, 0, NULL); if (retval != ERROR_OK) return retval; return jtag_execute_queue(); }{ ... } static int jtag_dp_run(struct adiv5_dap *dap) { int retval; int retval2 = ERROR_OK; retval = adi_jtag_finish_read(dap); if (retval != ERROR_OK) goto done; retval2 = jtagdp_overrun_check(dap); retval = jtagdp_transaction_endcheck(dap); done: return (retval2 != ERROR_OK) ? retval2 : retval; }{ ... } static int jtag_dp_sync(struct adiv5_dap *dap) { return jtagdp_overrun_check(dap); }{ ... } /* FIXME don't export ... just initialize as * part of DAP setup *//* ... */ const struct dap_ops jtag_dp_ops = { .connect = jtag_connect, .send_sequence = jtag_send_sequence, .queue_dp_read = jtag_dp_q_read, .queue_dp_write = jtag_dp_q_write, .queue_ap_read = jtag_ap_q_read, .queue_ap_write = jtag_ap_q_write, .queue_ap_abort = jtag_ap_q_abort, .run = jtag_dp_run, .sync = jtag_dp_sync, .quit = jtag_quit, ...};
Details
Show:
from
Types: Columns:
Click anywhere in the source to view detailed information here...