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
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
|
/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* Copyright (C) 2008 by Hongtao Zheng *
* hontor@126.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "breakpoints.h"
#include "embeddedice.h"
#include "target_request.h"
#include "etm.h"
#include "time_support.h"
#include "arm_simulator.h"
#include "algorithm.h"
#include "register.h"
/**
* @file
* Hold common code supporting the ARM7 and ARM9 core generations.
*
* While the ARM core implementations evolved substantially during these
* two generations, they look quite similar from the JTAG perspective.
* Both have similar debug facilities, based on the same two scan chains
* providing access to the core and to an EmbeddedICE module. Both can
* support similar ETM and ETB modules, for tracing. And both expose
* what could be viewed as "ARM Classic", with multiple processor modes,
* shadowed registers, and support for the Thumb instruction set.
*
* Processor differences include things like presence or absence of MMU
* and cache, pipeline sizes, use of a modified Harvard Architecure
* (with separate instruction and data busses from the CPU), support
* for cpu clock gating during idle, and more.
*/
static int arm7_9_debug_entry(struct target *target);
/**
* Clear watchpoints for an ARM7/9 target.
*
* @param arm7_9 Pointer to the common struct for an ARM7/9 target
* @return JTAG error status after executing queue
*/
static int arm7_9_clear_watchpoints(struct arm7_9_common *arm7_9)
{
LOG_DEBUG("-");
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
arm7_9->sw_breakpoint_count = 0;
arm7_9->sw_breakpoints_added = 0;
arm7_9->wp0_used = 0;
arm7_9->wp1_used = arm7_9->wp1_used_default;
arm7_9->wp_available = arm7_9->wp_available_max;
return jtag_execute_queue();
}
/**
* Assign a watchpoint to one of the two available hardware comparators in an
* ARM7 or ARM9 target.
*
* @param arm7_9 Pointer to the common struct for an ARM7/9 target
* @param breakpoint Pointer to the breakpoint to be used as a watchpoint
*/
static void arm7_9_assign_wp(struct arm7_9_common *arm7_9, struct breakpoint *breakpoint)
{
if (!arm7_9->wp0_used)
{
arm7_9->wp0_used = 1;
breakpoint->set = 1;
arm7_9->wp_available--;
}
else if (!arm7_9->wp1_used)
{
arm7_9->wp1_used = 1;
breakpoint->set = 2;
arm7_9->wp_available--;
}
else
{
LOG_ERROR("BUG: no hardware comparator available");
}
LOG_DEBUG("BPID: %d (0x%08" PRIx32 ") using hw wp: %d",
breakpoint->unique_id,
breakpoint->address,
breakpoint->set );
}
/**
* Setup an ARM7/9 target's embedded ICE registers for software breakpoints.
*
* @param arm7_9 Pointer to common struct for ARM7/9 targets
* @return Error codes if there is a problem finding a watchpoint or the result
* of executing the JTAG queue
*/
static int arm7_9_set_software_breakpoints(struct arm7_9_common *arm7_9)
{
if (arm7_9->sw_breakpoints_added)
{
return ERROR_OK;
}
if (arm7_9->wp_available < 1)
{
LOG_WARNING("can't enable sw breakpoints with no watchpoint unit available");
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
arm7_9->wp_available--;
/* pick a breakpoint unit */
if (!arm7_9->wp0_used)
{
arm7_9->sw_breakpoints_added = 1;
arm7_9->wp0_used = 3;
} else if (!arm7_9->wp1_used)
{
arm7_9->sw_breakpoints_added = 2;
arm7_9->wp1_used = 3;
}
else
{
LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
return ERROR_FAIL;
}
if (arm7_9->sw_breakpoints_added == 1)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], arm7_9->arm_bkpt);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0x0);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffffu);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
}
else if (arm7_9->sw_breakpoints_added == 2)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], arm7_9->arm_bkpt);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0x0);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0xffffffffu);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
}
else
{
LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
return ERROR_FAIL;
}
LOG_DEBUG("SW BP using hw wp: %d",
arm7_9->sw_breakpoints_added );
return jtag_execute_queue();
}
/**
* Setup the common pieces for an ARM7/9 target after reset or on startup.
*
* @param target Pointer to an ARM7/9 target to setup
* @return Result of clearing the watchpoints on the target
*/
int arm7_9_setup(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
return arm7_9_clear_watchpoints(arm7_9);
}
/**
* Set either a hardware or software breakpoint on an ARM7/9 target. The
* breakpoint is set up even if it is already set. Some actions, e.g. reset,
* might have erased the values in Embedded ICE.
*
* @param target Pointer to the target device to set the breakpoints on
* @param breakpoint Pointer to the breakpoint to be set
* @return For hardware breakpoints, this is the result of executing the JTAG
* queue. For software breakpoints, this will be the status of the
* required memory reads and writes
*/
int arm7_9_set_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
int retval = ERROR_OK;
LOG_DEBUG("BPID: %d, Address: 0x%08" PRIx32 ", Type: %d" ,
breakpoint->unique_id,
breakpoint->address,
breakpoint->type);
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (breakpoint->type == BKPT_HARD)
{
/* either an ARM (4 byte) or Thumb (2 byte) breakpoint */
uint32_t mask = (breakpoint->length == 4) ? 0x3u : 0x1u;
/* reassign a hw breakpoint */
if (breakpoint->set == 0)
{
arm7_9_assign_wp(arm7_9, breakpoint);
}
if (breakpoint->set == 1)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], breakpoint->address);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffffu);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
}
else if (breakpoint->set == 2)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], breakpoint->address);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffffu);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
}
else
{
LOG_ERROR("BUG: no hardware comparator available");
return ERROR_OK;
}
retval = jtag_execute_queue();
}
else if (breakpoint->type == BKPT_SOFT)
{
/* did we already set this breakpoint? */
if (breakpoint->set)
return ERROR_OK;
if (breakpoint->length == 4)
{
uint32_t verify = 0xffffffff;
/* keep the original instruction in target endianness */
if ((retval = target_read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr)) != ERROR_OK)
{
return retval;
}
/* write the breakpoint instruction in target endianness (arm7_9->arm_bkpt is host endian) */
if ((retval = target_write_u32(target, breakpoint->address, arm7_9->arm_bkpt)) != ERROR_OK)
{
return retval;
}
if ((retval = target_read_u32(target, breakpoint->address, &verify)) != ERROR_OK)
{
return retval;
}
if (verify != arm7_9->arm_bkpt)
{
LOG_ERROR("Unable to set 32 bit software breakpoint at address %08" PRIx32 " - check that memory is read/writable", breakpoint->address);
return ERROR_OK;
}
}
else
{
uint16_t verify = 0xffff;
/* keep the original instruction in target endianness */
if ((retval = target_read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr)) != ERROR_OK)
{
return retval;
}
/* write the breakpoint instruction in target endianness (arm7_9->thumb_bkpt is host endian) */
if ((retval = target_write_u16(target, breakpoint->address, arm7_9->thumb_bkpt)) != ERROR_OK)
{
return retval;
}
if ((retval = target_read_u16(target, breakpoint->address, &verify)) != ERROR_OK)
{
return retval;
}
if (verify != arm7_9->thumb_bkpt)
{
LOG_ERROR("Unable to set thumb software breakpoint at address %08" PRIx32 " - check that memory is read/writable", breakpoint->address);
return ERROR_OK;
}
}
if ((retval = arm7_9_set_software_breakpoints(arm7_9)) != ERROR_OK)
return retval;
arm7_9->sw_breakpoint_count++;
breakpoint->set = 1;
}
return retval;
}
/**
* Unsets an existing breakpoint on an ARM7/9 target. If it is a hardware
* breakpoint, the watchpoint used will be freed and the Embedded ICE registers
* will be updated. Otherwise, the software breakpoint will be restored to its
* original instruction if it hasn't already been modified.
*
* @param target Pointer to ARM7/9 target to unset the breakpoint from
* @param breakpoint Pointer to breakpoint to be unset
* @return For hardware breakpoints, this is the result of executing the JTAG
* queue. For software breakpoints, this will be the status of the
* required memory reads and writes
*/
int arm7_9_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
LOG_DEBUG("BPID: %d, Address: 0x%08" PRIx32,
breakpoint->unique_id,
breakpoint->address );
if (!breakpoint->set)
{
LOG_WARNING("breakpoint not set");
return ERROR_OK;
}
if (breakpoint->type == BKPT_HARD)
{
LOG_DEBUG("BPID: %d Releasing hw wp: %d",
breakpoint->unique_id,
breakpoint->set );
if (breakpoint->set == 1)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
arm7_9->wp0_used = 0;
arm7_9->wp_available++;
}
else if (breakpoint->set == 2)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
arm7_9->wp1_used = 0;
arm7_9->wp_available++;
}
retval = jtag_execute_queue();
breakpoint->set = 0;
}
else
{
/* restore original instruction (kept in target endianness) */
if (breakpoint->length == 4)
{
uint32_t current_instr;
/* check that user program as not modified breakpoint instruction */
if ((retval = target_read_memory(target, breakpoint->address, 4, 1, (uint8_t*)¤t_instr)) != ERROR_OK)
{
return retval;
}
if (current_instr == arm7_9->arm_bkpt)
if ((retval = target_write_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr)) != ERROR_OK)
{
return retval;
}
}
else
{
uint16_t current_instr;
/* check that user program as not modified breakpoint instruction */
if ((retval = target_read_memory(target, breakpoint->address, 2, 1, (uint8_t*)¤t_instr)) != ERROR_OK)
{
return retval;
}
if (current_instr == arm7_9->thumb_bkpt)
if ((retval = target_write_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr)) != ERROR_OK)
{
return retval;
}
}
if (--arm7_9->sw_breakpoint_count==0)
{
/* We have removed the last sw breakpoint, clear the hw breakpoint we used to implement it */
if (arm7_9->sw_breakpoints_added == 1)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0);
}
else if (arm7_9->sw_breakpoints_added == 2)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0);
}
}
breakpoint->set = 0;
}
return retval;
}
/**
* Add a breakpoint to an ARM7/9 target. This makes sure that there are no
* dangling breakpoints and that the desired breakpoint can be added.
*
* @param target Pointer to the target ARM7/9 device to add a breakpoint to
* @param breakpoint Pointer to the breakpoint to be added
* @return An error status if there is a problem adding the breakpoint or the
* result of setting the breakpoint
*/
int arm7_9_add_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (arm7_9->breakpoint_count == 0)
{
/* make sure we don't have any dangling breakpoints. This is vital upon
* GDB connect/disconnect
*/
arm7_9_clear_watchpoints(arm7_9);
}
if ((breakpoint->type == BKPT_HARD) && (arm7_9->wp_available < 1))
{
LOG_INFO("no watchpoint unit available for hardware breakpoint");
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
if ((breakpoint->length != 2) && (breakpoint->length != 4))
{
LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
if (breakpoint->type == BKPT_HARD)
{
arm7_9_assign_wp(arm7_9, breakpoint);
}
arm7_9->breakpoint_count++;
return arm7_9_set_breakpoint(target, breakpoint);
}
/**
* Removes a breakpoint from an ARM7/9 target. This will make sure there are no
* dangling breakpoints and updates available watchpoints if it is a hardware
* breakpoint.
*
* @param target Pointer to the target to have a breakpoint removed
* @param breakpoint Pointer to the breakpoint to be removed
* @return Error status if there was a problem unsetting the breakpoint or the
* watchpoints could not be cleared
*/
int arm7_9_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if ((retval = arm7_9_unset_breakpoint(target, breakpoint)) != ERROR_OK)
{
return retval;
}
if (breakpoint->type == BKPT_HARD)
arm7_9->wp_available++;
arm7_9->breakpoint_count--;
if (arm7_9->breakpoint_count == 0)
{
/* make sure we don't have any dangling breakpoints */
if ((retval = arm7_9_clear_watchpoints(arm7_9)) != ERROR_OK)
{
return retval;
}
}
return ERROR_OK;
}
/**
* Sets a watchpoint for an ARM7/9 target in one of the watchpoint units. It is
* considered a bug to call this function when there are no available watchpoint
* units.
*
* @param target Pointer to an ARM7/9 target to set a watchpoint on
* @param watchpoint Pointer to the watchpoint to be set
* @return Error status if watchpoint set fails or the result of executing the
* JTAG queue
*/
int arm7_9_set_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
int rw_mask = 1;
uint32_t mask;
mask = watchpoint->length - 1;
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (watchpoint->rw == WPT_ACCESS)
rw_mask = 0;
else
rw_mask = 1;
if (!arm7_9->wp0_used)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], watchpoint->address);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], watchpoint->mask);
if (watchpoint->mask != 0xffffffffu)
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], watchpoint->value);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xff & ~EICE_W_CTRL_nOPC & ~rw_mask);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE | EICE_W_CTRL_nOPC | (watchpoint->rw & 1));
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
watchpoint->set = 1;
arm7_9->wp0_used = 2;
}
else if (!arm7_9->wp1_used)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], watchpoint->address);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], watchpoint->mask);
if (watchpoint->mask != 0xffffffffu)
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], watchpoint->value);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], 0xff & ~EICE_W_CTRL_nOPC & ~rw_mask);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE | EICE_W_CTRL_nOPC | (watchpoint->rw & 1));
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
watchpoint->set = 2;
arm7_9->wp1_used = 2;
}
else
{
LOG_ERROR("BUG: no hardware comparator available");
return ERROR_OK;
}
return ERROR_OK;
}
/**
* Unset an existing watchpoint and clear the used watchpoint unit.
*
* @param target Pointer to the target to have the watchpoint removed
* @param watchpoint Pointer to the watchpoint to be removed
* @return Error status while trying to unset the watchpoint or the result of
* executing the JTAG queue
*/
int arm7_9_unset_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (!watchpoint->set)
{
LOG_WARNING("breakpoint not set");
return ERROR_OK;
}
if (watchpoint->set == 1)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
arm7_9->wp0_used = 0;
}
else if (watchpoint->set == 2)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
arm7_9->wp1_used = 0;
}
watchpoint->set = 0;
return ERROR_OK;
}
/**
* Add a watchpoint to an ARM7/9 target. If there are no watchpoint units
* available, an error response is returned.
*
* @param target Pointer to the ARM7/9 target to add a watchpoint to
* @param watchpoint Pointer to the watchpoint to be added
* @return Error status while trying to add the watchpoint
*/
int arm7_9_add_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (arm7_9->wp_available < 1)
{
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
{
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
arm7_9->wp_available--;
return ERROR_OK;
}
/**
* Remove a watchpoint from an ARM7/9 target. The watchpoint will be unset and
* the used watchpoint unit will be reopened.
*
* @param target Pointer to the target to remove a watchpoint from
* @param watchpoint Pointer to the watchpoint to be removed
* @return Result of trying to unset the watchpoint
*/
int arm7_9_remove_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (watchpoint->set)
{
if ((retval = arm7_9_unset_watchpoint(target, watchpoint)) != ERROR_OK)
{
return retval;
}
}
arm7_9->wp_available++;
return ERROR_OK;
}
/**
* Restarts the target by sending a RESTART instruction and moving the JTAG
* state to IDLE. This includes a timeout waiting for DBGACK and SYSCOMP to be
* asserted by the processor.
*
* @param target Pointer to target to issue commands to
* @return Error status if there is a timeout or a problem while executing the
* JTAG queue
*/
int arm7_9_execute_sys_speed(struct target *target)
{
int retval;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
/* set RESTART instruction */
jtag_set_end_state(TAP_IDLE);
if (arm7_9->need_bypass_before_restart) {
arm7_9->need_bypass_before_restart = 0;
arm_jtag_set_instr(jtag_info, 0xf, NULL);
}
arm_jtag_set_instr(jtag_info, 0x4, NULL);
long long then = timeval_ms();
int timeout;
while (!(timeout = ((timeval_ms()-then) > 1000)))
{
/* read debug status register */
embeddedice_read_reg(dbg_stat);
if ((retval = jtag_execute_queue()) != ERROR_OK)
return retval;
if ((buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1))
&& (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_SYSCOMP, 1)))
break;
if (debug_level >= 3)
{
alive_sleep(100);
} else
{
keep_alive();
}
}
if (timeout)
{
LOG_ERROR("timeout waiting for SYSCOMP & DBGACK, last DBG_STATUS: %" PRIx32 "", buf_get_u32(dbg_stat->value, 0, dbg_stat->size));
return ERROR_TARGET_TIMEOUT;
}
return ERROR_OK;
}
/**
* Restarts the target by sending a RESTART instruction and moving the JTAG
* state to IDLE. This validates that DBGACK and SYSCOMP are set without
* waiting until they are.
*
* @param target Pointer to the target to issue commands to
* @return Always ERROR_OK
*/
int arm7_9_execute_fast_sys_speed(struct target *target)
{
static int set = 0;
static uint8_t check_value[4], check_mask[4];
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
/* set RESTART instruction */
jtag_set_end_state(TAP_IDLE);
if (arm7_9->need_bypass_before_restart) {
arm7_9->need_bypass_before_restart = 0;
arm_jtag_set_instr(jtag_info, 0xf, NULL);
}
arm_jtag_set_instr(jtag_info, 0x4, NULL);
if (!set)
{
/* check for DBGACK and SYSCOMP set (others don't care) */
/* NB! These are constants that must be available until after next jtag_execute() and
* we evaluate the values upon first execution in lieu of setting up these constants
* during early setup.
* */
buf_set_u32(check_value, 0, 32, 0x9);
buf_set_u32(check_mask, 0, 32, 0x9);
set = 1;
}
/* read debug status register */
embeddedice_read_reg_w_check(dbg_stat, check_value, check_mask);
return ERROR_OK;
}
/**
* Get some data from the ARM7/9 target.
*
* @param target Pointer to the ARM7/9 target to read data from
* @param size The number of 32bit words to be read
* @param buffer Pointer to the buffer that will hold the data
* @return The result of receiving data from the Embedded ICE unit
*/
int arm7_9_target_request_data(struct target *target, uint32_t size, uint8_t *buffer)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
uint32_t *data;
int retval = ERROR_OK;
uint32_t i;
data = malloc(size * (sizeof(uint32_t)));
retval = embeddedice_receive(jtag_info, data, size);
/* return the 32-bit ints in the 8-bit array */
for (i = 0; i < size; i++)
{
h_u32_to_le(buffer + (i * 4), data[i]);
}
free(data);
return retval;
}
/**
* Handles requests to an ARM7/9 target. If debug messaging is enabled, the
* target is running and the DCC control register has the W bit high, this will
* execute the request on the target.
*
* @param priv Void pointer expected to be a struct target pointer
* @return ERROR_OK unless there are issues with the JTAG queue or when reading
* from the Embedded ICE unit
*/
int arm7_9_handle_target_request(void *priv)
{
int retval = ERROR_OK;
struct target *target = priv;
if (!target_was_examined(target))
return ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
struct reg *dcc_control = &arm7_9->eice_cache->reg_list[EICE_COMMS_CTRL];
if (!target->dbg_msg_enabled)
return ERROR_OK;
if (target->state == TARGET_RUNNING)
{
/* read DCC control register */
embeddedice_read_reg(dcc_control);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
/* check W bit */
if (buf_get_u32(dcc_control->value, 1, 1) == 1)
{
uint32_t request;
if ((retval = embeddedice_receive(jtag_info, &request, 1)) != ERROR_OK)
{
return retval;
}
if ((retval = target_request(target, request)) != ERROR_OK)
{
return retval;
}
}
}
return ERROR_OK;
}
/**
* Polls an ARM7/9 target for its current status. If DBGACK is set, the target
* is manipulated to the right halted state based on its current state. This is
* what happens:
*
* <table>
* <tr><th > State</th><th > Action</th></tr>
* <tr><td > TARGET_RUNNING | TARGET_RESET</td><td > Enters debug mode. If TARGET_RESET, pc may be checked</td></tr>
* <tr><td > TARGET_UNKNOWN</td><td > Warning is logged</td></tr>
* <tr><td > TARGET_DEBUG_RUNNING</td><td > Enters debug mode</td></tr>
* <tr><td > TARGET_HALTED</td><td > Nothing</td></tr>
* </table>
*
* If the target does not end up in the halted state, a warning is produced. If
* DBGACK is cleared, then the target is expected to either be running or
* running in debug.
*
* @param target Pointer to the ARM7/9 target to poll
* @return ERROR_OK or an error status if a command fails
*/
int arm7_9_poll(struct target *target)
{
int retval;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
/* read debug status register */
embeddedice_read_reg(dbg_stat);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1))
{
/* LOG_DEBUG("DBGACK set, dbg_state->value: 0x%x", buf_get_u32(dbg_stat->value, 0, 32));*/
if (target->state == TARGET_UNKNOWN)
{
/* Starting OpenOCD with target in debug-halt */
target->state = TARGET_RUNNING;
LOG_DEBUG("DBGACK already set during server startup.");
}
if ((target->state == TARGET_RUNNING) || (target->state == TARGET_RESET))
{
int check_pc = 0;
if (target->state == TARGET_RESET)
{
if (target->reset_halt)
{
enum reset_types jtag_reset_config = jtag_get_reset_config();
if ((jtag_reset_config & RESET_SRST_PULLS_TRST) == 0)
{
check_pc = 1;
}
}
}
target->state = TARGET_HALTED;
if ((retval = arm7_9_debug_entry(target)) != ERROR_OK)
return retval;
if (check_pc)
{
struct reg *reg = register_get_by_name(target->reg_cache, "pc", 1);
uint32_t t=*((uint32_t *)reg->value);
if (t != 0)
{
LOG_ERROR("PC was not 0. Does this target need srst_pulls_trst?");
}
}
if ((retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED)) != ERROR_OK)
{
return retval;
}
}
if (target->state == TARGET_DEBUG_RUNNING)
{
target->state = TARGET_HALTED;
if ((retval = arm7_9_debug_entry(target)) != ERROR_OK)
return retval;
if ((retval = target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED)) != ERROR_OK)
{
return retval;
}
}
if (target->state != TARGET_HALTED)
{
LOG_WARNING("DBGACK set, but the target did not end up in the halted state %d", target->state);
}
}
else
{
if (target->state != TARGET_DEBUG_RUNNING)
target->state = TARGET_RUNNING;
}
return ERROR_OK;
}
/**
* Asserts the reset (SRST) on an ARM7/9 target. Some -S targets (ARM966E-S in
* the STR912 isn't affected, ARM926EJ-S in the LPC3180 and AT91SAM9260 is
* affected) completely stop the JTAG clock while the core is held in reset
* (SRST). It isn't possible to program the halt condition once reset is
* asserted, hence a hook that allows the target to set up its reset-halt
* condition is setup prior to asserting reset.
*
* @param target Pointer to an ARM7/9 target to assert reset on
* @return ERROR_FAIL if the JTAG device does not have SRST, otherwise ERROR_OK
*/
int arm7_9_assert_reset(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
LOG_DEBUG("target->state: %s",
target_state_name(target));
enum reset_types jtag_reset_config = jtag_get_reset_config();
if (!(jtag_reset_config & RESET_HAS_SRST))
{
LOG_ERROR("Can't assert SRST");
return ERROR_FAIL;
}
/* At this point trst has been asserted/deasserted once. We would
* like to program EmbeddedICE while SRST is asserted, instead of
* depending on SRST to leave that module alone. However, many CPUs
* gate the JTAG clock while SRST is asserted; or JTAG may need
* clock stability guarantees (adaptive clocking might help).
*
* So we assume JTAG access during SRST is off the menu unless it's
* been specifically enabled.
*/
bool srst_asserted = false;
if (((jtag_reset_config & RESET_SRST_PULLS_TRST) == 0)
&& (jtag_reset_config & RESET_SRST_NO_GATING))
{
jtag_add_reset(0, 1);
srst_asserted = true;
}
if (target->reset_halt)
{
/*
* Some targets do not support communication while SRST is asserted. We need to
* set up the reset vector catch here.
*
* If TRST is asserted, then these settings will be reset anyway, so setting them
* here is harmless.
*/
if (arm7_9->has_vector_catch)
{
/* program vector catch register to catch reset vector */
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH], 0x1);
/* extra runtest added as issues were found with certain ARM9 cores (maybe more) - AT91SAM9260 and STR9 */
jtag_add_runtest(1, jtag_get_end_state());
}
else
{
/* program watchpoint unit to match on reset vector address */
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], 0x0);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0x3);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
}
}
/* here we should issue an SRST only, but we may have to assert TRST as well */
if (jtag_reset_config & RESET_SRST_PULLS_TRST)
{
jtag_add_reset(1, 1);
} else if (!srst_asserted)
{
jtag_add_reset(0, 1);
}
target->state = TARGET_RESET;
jtag_add_sleep(50000);
armv4_5_invalidate_core_regs(target);
if ((target->reset_halt) && ((jtag_reset_config & RESET_SRST_PULLS_TRST) == 0))
{
/* debug entry was already prepared in arm7_9_assert_reset() */
target->debug_reason = DBG_REASON_DBGRQ;
}
return ERROR_OK;
}
/**
* Deassert the reset (SRST) signal on an ARM7/9 target. If SRST pulls TRST
* and the target is being reset into a halt, a warning will be triggered
* because it is not possible to reset into a halted mode in this case. The
* target is halted using the target's functions.
*
* @param target Pointer to the target to have the reset deasserted
* @return ERROR_OK or an error from polling or halting the target
*/
int arm7_9_deassert_reset(struct target *target)
{
int retval = ERROR_OK;
LOG_DEBUG("target->state: %s",
target_state_name(target));
/* deassert reset lines */
jtag_add_reset(0, 0);
enum reset_types jtag_reset_config = jtag_get_reset_config();
if (target->reset_halt && (jtag_reset_config & RESET_SRST_PULLS_TRST) != 0)
{
LOG_WARNING("srst pulls trst - can not reset into halted mode. Issuing halt after reset.");
/* set up embedded ice registers again */
if ((retval = target_examine_one(target)) != ERROR_OK)
return retval;
if ((retval = target_poll(target)) != ERROR_OK)
{
return retval;
}
if ((retval = target_halt(target)) != ERROR_OK)
{
return retval;
}
}
return retval;
}
/**
* Clears the halt condition for an ARM7/9 target. If it isn't coming out of
* reset and if DBGRQ is used, it is progammed to be deasserted. If the reset
* vector catch was used, it is restored. Otherwise, the control value is
* restored and the watchpoint unit is restored if it was in use.
*
* @param target Pointer to the ARM7/9 target to have halt cleared
* @return Always ERROR_OK
*/
int arm7_9_clear_halt(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
/* we used DBGRQ only if we didn't come out of reset */
if (!arm7_9->debug_entry_from_reset && arm7_9->use_dbgrq)
{
/* program EmbeddedICE Debug Control Register to deassert DBGRQ
*/
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
embeddedice_store_reg(dbg_ctrl);
}
else
{
if (arm7_9->debug_entry_from_reset && arm7_9->has_vector_catch)
{
/* if we came out of reset, and vector catch is supported, we used
* vector catch to enter debug state
* restore the register in that case
*/
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH]);
}
else
{
/* restore registers if watchpoint unit 0 was in use
*/
if (arm7_9->wp0_used)
{
if (arm7_9->debug_entry_from_reset)
{
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE]);
}
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK]);
}
/* control value always has to be restored, as it was either disabled,
* or enabled with possibly different bits
*/
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
}
}
return ERROR_OK;
}
/**
* Issue a software reset and halt to an ARM7/9 target. The target is halted
* and then there is a wait until the processor shows the halt. This wait can
* timeout and results in an error being returned. The software reset involves
* clearing the halt, updating the debug control register, changing to ARM mode,
* reset of the program counter, and reset of all of the registers.
*
* @param target Pointer to the ARM7/9 target to be reset and halted by software
* @return Error status if any of the commands fail, otherwise ERROR_OK
*/
int arm7_9_soft_reset_halt(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
int i;
int retval;
/* FIX!!! replace some of this code with tcl commands
*
* halt # the halt command is synchronous
* armv4_5 core_state arm
*
*/
if ((retval = target_halt(target)) != ERROR_OK)
return retval;
long long then = timeval_ms();
int timeout;
while (!(timeout = ((timeval_ms()-then) > 1000)))
{
if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) != 0)
break;
embeddedice_read_reg(dbg_stat);
if ((retval = jtag_execute_queue()) != ERROR_OK)
return retval;
if (debug_level >= 3)
{
alive_sleep(100);
} else
{
keep_alive();
}
}
if (timeout)
{
LOG_ERROR("Failed to halt CPU after 1 sec");
return ERROR_TARGET_TIMEOUT;
}
target->state = TARGET_HALTED;
/* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
* ensure that DBGRQ is cleared
*/
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 1);
embeddedice_store_reg(dbg_ctrl);
if ((retval = arm7_9_clear_halt(target)) != ERROR_OK)
{
return retval;
}
/* if the target is in Thumb state, change to ARM state */
if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_ITBIT, 1))
{
uint32_t r0_thumb, pc_thumb;
LOG_DEBUG("target entered debug from Thumb state, changing to ARM");
/* Entered debug from Thumb mode */
armv4_5->core_state = ARMV4_5_STATE_THUMB;
arm7_9->change_to_arm(target, &r0_thumb, &pc_thumb);
}
/* all register content is now invalid */
if ((retval = armv4_5_invalidate_core_regs(target)) != ERROR_OK)
{
return retval;
}
/* SVC, ARM state, IRQ and FIQ disabled */
buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
/* start fetching from 0x0 */
buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
armv4_5->core_cache->reg_list[15].dirty = 1;
armv4_5->core_cache->reg_list[15].valid = 1;
armv4_5->core_mode = ARMV4_5_MODE_SVC;
armv4_5->core_state = ARMV4_5_STATE_ARM;
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
/* reset registers */
for (i = 0; i <= 14; i++)
{
buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, 0xffffffff);
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 1;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
}
if ((retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED)) != ERROR_OK)
{
return retval;
}
return ERROR_OK;
}
/**
* Halt an ARM7/9 target. This is accomplished by either asserting the DBGRQ
* line or by programming a watchpoint to trigger on any address. It is
* considered a bug to call this function while the target is in the
* TARGET_RESET state.
*
* @param target Pointer to the ARM7/9 target to be halted
* @return Always ERROR_OK
*/
int arm7_9_halt(struct target *target)
{
if (target->state == TARGET_RESET)
{
LOG_ERROR("BUG: arm7/9 does not support halt during reset. This is handled in arm7_9_assert_reset()");
return ERROR_OK;
}
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
LOG_DEBUG("target->state: %s",
target_state_name(target));
if (target->state == TARGET_HALTED)
{
LOG_DEBUG("target was already halted");
return ERROR_OK;
}
if (target->state == TARGET_UNKNOWN)
{
LOG_WARNING("target was in unknown state when halt was requested");
}
if (arm7_9->use_dbgrq)
{
/* program EmbeddedICE Debug Control Register to assert DBGRQ
*/
if (arm7_9->set_special_dbgrq) {
arm7_9->set_special_dbgrq(target);
} else {
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 1);
embeddedice_store_reg(dbg_ctrl);
}
}
else
{
/* program watchpoint unit to match on any address
*/
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
}
target->debug_reason = DBG_REASON_DBGRQ;
return ERROR_OK;
}
/**
* Handle an ARM7/9 target's entry into debug mode. The halt is cleared on the
* ARM. The JTAG queue is then executed and the reason for debug entry is
* examined. Once done, the target is verified to be halted and the processor
* is forced into ARM mode. The core registers are saved for the current core
* mode and the program counter (register 15) is updated as needed. The core
* registers and CPSR and SPSR are saved for restoration later.
*
* @param target Pointer to target that is entering debug mode
* @return Error code if anything fails, otherwise ERROR_OK
*/
static int arm7_9_debug_entry(struct target *target)
{
int i;
uint32_t context[16];
uint32_t* context_p[16];
uint32_t r0_thumb, pc_thumb;
uint32_t cpsr;
int retval;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
#ifdef _DEBUG_ARM7_9_
LOG_DEBUG("-");
#endif
/* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
* ensure that DBGRQ is cleared
*/
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 1);
embeddedice_store_reg(dbg_ctrl);
if ((retval = arm7_9_clear_halt(target)) != ERROR_OK)
{
return retval;
}
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
if ((retval = arm7_9->examine_debug_reason(target)) != ERROR_OK)
return retval;
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
/* if the target is in Thumb state, change to ARM state */
if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_ITBIT, 1))
{
LOG_DEBUG("target entered debug from Thumb state");
/* Entered debug from Thumb mode */
armv4_5->core_state = ARMV4_5_STATE_THUMB;
arm7_9->change_to_arm(target, &r0_thumb, &pc_thumb);
LOG_DEBUG("r0_thumb: 0x%8.8" PRIx32 ", pc_thumb: 0x%8.8" PRIx32 "", r0_thumb, pc_thumb);
}
else
{
LOG_DEBUG("target entered debug from ARM state");
/* Entered debug from ARM mode */
armv4_5->core_state = ARMV4_5_STATE_ARM;
}
for (i = 0; i < 16; i++)
context_p[i] = &context[i];
/* save core registers (r0 - r15 of current core mode) */
arm7_9->read_core_regs(target, 0xffff, context_p);
arm7_9->read_xpsr(target, &cpsr, 0);
if ((retval = jtag_execute_queue()) != ERROR_OK)
return retval;
/* if the core has been executing in Thumb state, set the T bit */
if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
cpsr |= 0x20;
buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, cpsr);
armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 0;
armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
armv4_5->core_mode = cpsr & 0x1f;
if (armv4_5_mode_to_number(armv4_5->core_mode) == -1)
{
target->state = TARGET_UNKNOWN;
LOG_ERROR("cpsr contains invalid mode value - communication failure");
return ERROR_TARGET_FAILURE;
}
LOG_DEBUG("target entered debug state in %s mode", armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)]);
if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
{
LOG_DEBUG("thumb state, applying fixups");
context[0] = r0_thumb;
context[15] = pc_thumb;
} else if (armv4_5->core_state == ARMV4_5_STATE_ARM)
{
/* adjust value stored by STM */
context[15] -= 3 * 4;
}
if ((target->debug_reason != DBG_REASON_DBGRQ) || (!arm7_9->use_dbgrq))
context[15] -= 3 * ((armv4_5->core_state == ARMV4_5_STATE_ARM) ? 4 : 2);
else
context[15] -= arm7_9->dbgreq_adjust_pc * ((armv4_5->core_state == ARMV4_5_STATE_ARM) ? 4 : 2);
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
for (i = 0; i <= 15; i++)
{
LOG_DEBUG("r%i: 0x%8.8" PRIx32 "", i, context[i]);
buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, context[i]);
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 0;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
}
LOG_DEBUG("entered debug state at PC 0x%" PRIx32 "", context[15]);
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
/* exceptions other than USR & SYS have a saved program status register */
if ((armv4_5->core_mode != ARMV4_5_MODE_USR) && (armv4_5->core_mode != ARMV4_5_MODE_SYS))
{
uint32_t spsr;
arm7_9->read_xpsr(target, &spsr, 1);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, spsr);
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
}
/* r0 and r15 (pc) have to be restored later */
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).valid;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15).valid;
if ((retval = jtag_execute_queue()) != ERROR_OK)
return retval;
if (arm7_9->post_debug_entry)
arm7_9->post_debug_entry(target);
return ERROR_OK;
}
/**
* Validate the full context for an ARM7/9 target in all processor modes. If
* there are any invalid registers for the target, they will all be read. This
* includes the PSR.
*
* @param target Pointer to the ARM7/9 target to capture the full context from
* @return Error if the target is not halted, has an invalid core mode, or if
* the JTAG queue fails to execute
*/
int arm7_9_full_context(struct target *target)
{
int i;
int retval;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
LOG_DEBUG("-");
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
/* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
* SYS shares registers with User, so we don't touch SYS
*/
for (i = 0; i < 6; i++)
{
uint32_t mask = 0;
uint32_t* reg_p[16];
int j;
int valid = 1;
/* check if there are invalid registers in the current mode
*/
for (j = 0; j <= 16; j++)
{
if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
valid = 0;
}
if (!valid)
{
uint32_t tmp_cpsr;
/* change processor mode (and mask T bit) */
tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
tmp_cpsr |= armv4_5_number_to_mode(i);
tmp_cpsr &= ~0x20;
arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
for (j = 0; j < 15; j++)
{
if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
{
reg_p[j] = (uint32_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).value;
mask |= 1 << j;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid = 1;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
}
}
/* if only the PSR is invalid, mask is all zeroes */
if (mask)
arm7_9->read_core_regs(target, mask, reg_p);
/* check if the PSR has to be read */
if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid == 0)
{
arm7_9->read_xpsr(target, (uint32_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).value, 1);
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid = 1;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
}
}
}
/* restore processor mode (mask T bit) */
arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
return ERROR_OK;
}
/**
* Restore the processor context on an ARM7/9 target. The full processor
* context is analyzed to see if any of the registers are dirty on this end, but
* have a valid new value. If this is the case, the processor is changed to the
* appropriate mode and the new register values are written out to the
* processor. If there happens to be a dirty register with an invalid value, an
* error will be logged.
*
* @param target Pointer to the ARM7/9 target to have its context restored
* @return Error status if the target is not halted or the core mode in the
* armv4_5 struct is invalid.
*/
int arm7_9_restore_context(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
struct reg *reg;
struct armv4_5_core_reg *reg_arch_info;
enum armv4_5_mode current_mode = armv4_5->core_mode;
int i, j;
int dirty;
int mode_change;
LOG_DEBUG("-");
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (arm7_9->pre_restore_context)
arm7_9->pre_restore_context(target);
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
/* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
* SYS shares registers with User, so we don't touch SYS
*/
for (i = 0; i < 6; i++)
{
LOG_DEBUG("examining %s mode", armv4_5_mode_strings[i]);
dirty = 0;
mode_change = 0;
/* check if there are dirty registers in the current mode
*/
for (j = 0; j <= 16; j++)
{
reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j);
reg_arch_info = reg->arch_info;
if (reg->dirty == 1)
{
if (reg->valid == 1)
{
dirty = 1;
LOG_DEBUG("examining dirty reg: %s", reg->name);
if ((reg_arch_info->mode != ARMV4_5_MODE_ANY)
&& (reg_arch_info->mode != current_mode)
&& !((reg_arch_info->mode == ARMV4_5_MODE_USR) && (armv4_5->core_mode == ARMV4_5_MODE_SYS))
&& !((reg_arch_info->mode == ARMV4_5_MODE_SYS) && (armv4_5->core_mode == ARMV4_5_MODE_USR)))
{
mode_change = 1;
LOG_DEBUG("require mode change");
}
}
else
{
LOG_ERROR("BUG: dirty register '%s', but no valid data", reg->name);
}
}
}
if (dirty)
{
uint32_t mask = 0x0;
int num_regs = 0;
uint32_t regs[16];
if (mode_change)
{
uint32_t tmp_cpsr;
/* change processor mode (mask T bit) */
tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
tmp_cpsr |= armv4_5_number_to_mode(i);
tmp_cpsr &= ~0x20;
arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
current_mode = armv4_5_number_to_mode(i);
}
for (j = 0; j <= 14; j++)
{
reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j);
reg_arch_info = reg->arch_info;
if (reg->dirty == 1)
{
regs[j] = buf_get_u32(reg->value, 0, 32);
mask |= 1 << j;
num_regs++;
reg->dirty = 0;
reg->valid = 1;
LOG_DEBUG("writing register %i of mode %s with value 0x%8.8" PRIx32 "", j, armv4_5_mode_strings[i], regs[j]);
}
}
if (mask)
{
arm7_9->write_core_regs(target, mask, regs);
}
reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16);
reg_arch_info = reg->arch_info;
if ((reg->dirty) && (reg_arch_info->mode != ARMV4_5_MODE_ANY))
{
LOG_DEBUG("writing SPSR of mode %i with value 0x%8.8" PRIx32 "", i, buf_get_u32(reg->value, 0, 32));
arm7_9->write_xpsr(target, buf_get_u32(reg->value, 0, 32), 1);
}
}
}
if ((armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty == 0) && (armv4_5->core_mode != current_mode))
{
/* restore processor mode (mask T bit) */
uint32_t tmp_cpsr;
tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
tmp_cpsr |= armv4_5_number_to_mode(i);
tmp_cpsr &= ~0x20;
LOG_DEBUG("writing lower 8 bit of cpsr with value 0x%2.2x", (unsigned)(tmp_cpsr));
arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
}
else if (armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty == 1)
{
/* CPSR has been changed, full restore necessary (mask T bit) */
LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32 "", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
arm7_9->write_xpsr(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32) & ~0x20, 0);
armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 0;
armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
}
/* restore PC */
LOG_DEBUG("writing PC with value 0x%8.8" PRIx32 "", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
arm7_9->write_pc(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
armv4_5->core_cache->reg_list[15].dirty = 0;
if (arm7_9->post_restore_context)
arm7_9->post_restore_context(target);
return ERROR_OK;
}
/**
* Restart the core of an ARM7/9 target. A RESTART command is sent to the
* instruction register and the JTAG state is set to TAP_IDLE causing a core
* restart.
*
* @param target Pointer to the ARM7/9 target to be restarted
* @return Result of executing the JTAG queue
*/
int arm7_9_restart_core(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
/* set RESTART instruction */
jtag_set_end_state(TAP_IDLE);
if (arm7_9->need_bypass_before_restart) {
arm7_9->need_bypass_before_restart = 0;
arm_jtag_set_instr(jtag_info, 0xf, NULL);
}
arm_jtag_set_instr(jtag_info, 0x4, NULL);
jtag_add_runtest(1, jtag_set_end_state(TAP_IDLE));
return jtag_execute_queue();
}
/**
* Enable the watchpoints on an ARM7/9 target. The target's watchpoints are
* iterated through and are set on the target if they aren't already set.
*
* @param target Pointer to the ARM7/9 target to enable watchpoints on
*/
void arm7_9_enable_watchpoints(struct target *target)
{
struct watchpoint *watchpoint = target->watchpoints;
while (watchpoint)
{
if (watchpoint->set == 0)
arm7_9_set_watchpoint(target, watchpoint);
watchpoint = watchpoint->next;
}
}
/**
* Enable the breakpoints on an ARM7/9 target. The target's breakpoints are
* iterated through and are set on the target.
*
* @param target Pointer to the ARM7/9 target to enable breakpoints on
*/
void arm7_9_enable_breakpoints(struct target *target)
{
struct breakpoint *breakpoint = target->breakpoints;
/* set any pending breakpoints */
while (breakpoint)
{
arm7_9_set_breakpoint(target, breakpoint);
breakpoint = breakpoint->next;
}
}
int arm7_9_resume(struct target *target, int current, uint32_t address, int handle_breakpoints, int debug_execution)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
struct breakpoint *breakpoint = target->breakpoints;
struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
int err, retval = ERROR_OK;
LOG_DEBUG("-");
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (!debug_execution)
{
target_free_all_working_areas(target);
}
/* current = 1: continue on current pc, otherwise continue at <address> */
if (!current)
buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
uint32_t current_pc;
current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
/* the front-end may request us not to handle breakpoints */
if (handle_breakpoints)
{
if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
{
LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 " (id: %d)", breakpoint->address, breakpoint->unique_id );
if ((retval = arm7_9_unset_breakpoint(target, breakpoint)) != ERROR_OK)
{
return retval;
}
/* calculate PC of next instruction */
uint32_t next_pc;
if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
{
uint32_t current_opcode;
target_read_u32(target, current_pc, ¤t_opcode);
LOG_ERROR("Couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32 "", current_opcode);
return retval;
}
LOG_DEBUG("enable single-step");
arm7_9->enable_single_step(target, next_pc);
target->debug_reason = DBG_REASON_SINGLESTEP;
if ((retval = arm7_9_restore_context(target)) != ERROR_OK)
{
return retval;
}
if (armv4_5->core_state == ARMV4_5_STATE_ARM)
arm7_9->branch_resume(target);
else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
{
arm7_9->branch_resume_thumb(target);
}
else
{
LOG_ERROR("unhandled core state");
return ERROR_FAIL;
}
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
embeddedice_write_reg(dbg_ctrl, buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
err = arm7_9_execute_sys_speed(target);
LOG_DEBUG("disable single-step");
arm7_9->disable_single_step(target);
if (err != ERROR_OK)
{
if ((retval = arm7_9_set_breakpoint(target, breakpoint)) != ERROR_OK)
{
return retval;
}
target->state = TARGET_UNKNOWN;
return err;
}
arm7_9_debug_entry(target);
LOG_DEBUG("new PC after step: 0x%8.8" PRIx32 "", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32 "", breakpoint->address);
if ((retval = arm7_9_set_breakpoint(target, breakpoint)) != ERROR_OK)
{
return retval;
}
}
}
/* enable any pending breakpoints and watchpoints */
arm7_9_enable_breakpoints(target);
arm7_9_enable_watchpoints(target);
if ((retval = arm7_9_restore_context(target)) != ERROR_OK)
{
return retval;
}
if (armv4_5->core_state == ARMV4_5_STATE_ARM)
{
arm7_9->branch_resume(target);
}
else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
{
arm7_9->branch_resume_thumb(target);
}
else
{
LOG_ERROR("unhandled core state");
return ERROR_FAIL;
}
/* deassert DBGACK and INTDIS */
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
/* INTDIS only when we really resume, not during debug execution */
if (!debug_execution)
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 0);
embeddedice_write_reg(dbg_ctrl, buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
if ((retval = arm7_9_restart_core(target)) != ERROR_OK)
{
return retval;
}
target->debug_reason = DBG_REASON_NOTHALTED;
if (!debug_execution)
{
/* registers are now invalid */
armv4_5_invalidate_core_regs(target);
target->state = TARGET_RUNNING;
if ((retval = target_call_event_callbacks(target, TARGET_EVENT_RESUMED)) != ERROR_OK)
{
return retval;
}
}
else
{
target->state = TARGET_DEBUG_RUNNING;
if ((retval = target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED)) != ERROR_OK)
{
return retval;
}
}
LOG_DEBUG("target resumed");
return ERROR_OK;
}
void arm7_9_enable_eice_step(struct target *target, uint32_t next_pc)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
uint32_t current_pc;
current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
if (next_pc != current_pc)
{
/* setup an inverse breakpoint on the current PC
* - comparator 1 matches the current address
* - rangeout from comparator 1 is connected to comparator 0 rangein
* - comparator 0 matches any address, as long as rangein is low */
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~(EICE_W_CTRL_RANGE | EICE_W_CTRL_nOPC) & 0xff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], current_pc);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
}
else
{
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], next_pc);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
}
}
void arm7_9_disable_eice_step(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK]);
embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE]);
}
int arm7_9_step(struct target *target, int current, uint32_t address, int handle_breakpoints)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
struct breakpoint *breakpoint = NULL;
int err, retval;
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
/* current = 1: continue on current pc, otherwise continue at <address> */
if (!current)
buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
uint32_t current_pc;
current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
/* the front-end may request us not to handle breakpoints */
if (handle_breakpoints)
if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
if ((retval = arm7_9_unset_breakpoint(target, breakpoint)) != ERROR_OK)
{
return retval;
}
target->debug_reason = DBG_REASON_SINGLESTEP;
/* calculate PC of next instruction */
uint32_t next_pc;
if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
{
uint32_t current_opcode;
target_read_u32(target, current_pc, ¤t_opcode);
LOG_ERROR("Couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32 "", current_opcode);
return retval;
}
if ((retval = arm7_9_restore_context(target)) != ERROR_OK)
{
return retval;
}
arm7_9->enable_single_step(target, next_pc);
if (armv4_5->core_state == ARMV4_5_STATE_ARM)
{
arm7_9->branch_resume(target);
}
else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
{
arm7_9->branch_resume_thumb(target);
}
else
{
LOG_ERROR("unhandled core state");
return ERROR_FAIL;
}
if ((retval = target_call_event_callbacks(target, TARGET_EVENT_RESUMED)) != ERROR_OK)
{
return retval;
}
err = arm7_9_execute_sys_speed(target);
arm7_9->disable_single_step(target);
/* registers are now invalid */
armv4_5_invalidate_core_regs(target);
if (err != ERROR_OK)
{
target->state = TARGET_UNKNOWN;
} else {
arm7_9_debug_entry(target);
if ((retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED)) != ERROR_OK)
{
return retval;
}
LOG_DEBUG("target stepped");
}
if (breakpoint)
if ((retval = arm7_9_set_breakpoint(target, breakpoint)) != ERROR_OK)
{
return retval;
}
return err;
}
int arm7_9_read_core_reg(struct target *target, int num, enum armv4_5_mode mode)
{
uint32_t* reg_p[16];
uint32_t value;
int retval;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
enum armv4_5_mode reg_mode = ((struct armv4_5_core_reg*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info)->mode;
if ((num < 0) || (num > 16))
return ERROR_INVALID_ARGUMENTS;
if ((mode != ARMV4_5_MODE_ANY)
&& (mode != armv4_5->core_mode)
&& (reg_mode != ARMV4_5_MODE_ANY))
{
uint32_t tmp_cpsr;
/* change processor mode (mask T bit) */
tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
tmp_cpsr |= mode;
tmp_cpsr &= ~0x20;
arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
}
if ((num >= 0) && (num <= 15))
{
/* read a normal core register */
reg_p[num] = &value;
arm7_9->read_core_regs(target, 1 << num, reg_p);
}
else
{
/* read a program status register
* if the register mode is MODE_ANY, we read the cpsr, otherwise a spsr
*/
struct armv4_5_core_reg *arch_info = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info;
int spsr = (arch_info->mode == ARMV4_5_MODE_ANY) ? 0 : 1;
arm7_9->read_xpsr(target, &value, spsr);
}
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
return retval;
}
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).value, 0, 32, value);
if ((mode != ARMV4_5_MODE_ANY)
&& (mode != armv4_5->core_mode)
&& (reg_mode != ARMV4_5_MODE_ANY)) {
/* restore processor mode (mask T bit) */
arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
}
return ERROR_OK;
}
int arm7_9_write_core_reg(struct target *target, int num, enum armv4_5_mode mode, uint32_t value)
{
uint32_t reg[16];
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
enum armv4_5_mode reg_mode = ((struct armv4_5_core_reg*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info)->mode;
if ((num < 0) || (num > 16))
return ERROR_INVALID_ARGUMENTS;
if ((mode != ARMV4_5_MODE_ANY)
&& (mode != armv4_5->core_mode)
&& (reg_mode != ARMV4_5_MODE_ANY)) {
uint32_t tmp_cpsr;
/* change processor mode (mask T bit) */
tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
tmp_cpsr |= mode;
tmp_cpsr &= ~0x20;
arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
}
if ((num >= 0) && (num <= 15))
{
/* write a normal core register */
reg[num] = value;
arm7_9->write_core_regs(target, 1 << num, reg);
}
else
{
/* write a program status register
* if the register mode is MODE_ANY, we write the cpsr, otherwise a spsr
*/
struct armv4_5_core_reg *arch_info = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info;
int spsr = (arch_info->mode == ARMV4_5_MODE_ANY) ? 0 : 1;
/* if we're writing the CPSR, mask the T bit */
if (!spsr)
value &= ~0x20;
arm7_9->write_xpsr(target, value, spsr);
}
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
if ((mode != ARMV4_5_MODE_ANY)
&& (mode != armv4_5->core_mode)
&& (reg_mode != ARMV4_5_MODE_ANY)) {
/* restore processor mode (mask T bit) */
arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
}
return jtag_execute_queue();
}
int arm7_9_read_memory(struct target *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
uint32_t reg[16];
uint32_t num_accesses = 0;
int thisrun_accesses;
int i;
uint32_t cpsr;
int retval;
int last_reg = 0;
LOG_DEBUG("address: 0x%8.8" PRIx32 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32 "", address, size, count);
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
/* sanitize arguments */
if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
return ERROR_INVALID_ARGUMENTS;
if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
return ERROR_TARGET_UNALIGNED_ACCESS;
/* load the base register with the address of the first word */
reg[0] = address;
arm7_9->write_core_regs(target, 0x1, reg);
int j = 0;
switch (size)
{
case 4:
while (num_accesses < count)
{
uint32_t reg_list;
thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
if (last_reg <= thisrun_accesses)
last_reg = thisrun_accesses;
arm7_9->load_word_regs(target, reg_list);
/* fast memory reads are only safe when the target is running
* from a sufficiently high clock (32 kHz is usually too slow)
*/
if (arm7_9->fast_memory_access)
retval = arm7_9_execute_fast_sys_speed(target);
else
retval = arm7_9_execute_sys_speed(target);
if (retval != ERROR_OK)
return retval;
arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 4);
/* advance buffer, count number of accesses */
buffer += thisrun_accesses * 4;
num_accesses += thisrun_accesses;
if ((j++%1024) == 0)
{
keep_alive();
}
}
break;
case 2:
while (num_accesses < count)
{
uint32_t reg_list;
thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
for (i = 1; i <= thisrun_accesses; i++)
{
if (i > last_reg)
last_reg = i;
arm7_9->load_hword_reg(target, i);
/* fast memory reads are only safe when the target is running
* from a sufficiently high clock (32 kHz is usually too slow)
*/
if (arm7_9->fast_memory_access)
retval = arm7_9_execute_fast_sys_speed(target);
else
retval = arm7_9_execute_sys_speed(target);
if (retval != ERROR_OK)
{
return retval;
}
}
arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 2);
/* advance buffer, count number of accesses */
buffer += thisrun_accesses * 2;
num_accesses += thisrun_accesses;
if ((j++%1024) == 0)
{
keep_alive();
}
}
break;
case 1:
while (num_accesses < count)
{
uint32_t reg_list;
thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
for (i = 1; i <= thisrun_accesses; i++)
{
if (i > last_reg)
last_reg = i;
arm7_9->load_byte_reg(target, i);
/* fast memory reads are only safe when the target is running
* from a sufficiently high clock (32 kHz is usually too slow)
*/
if (arm7_9->fast_memory_access)
retval = arm7_9_execute_fast_sys_speed(target);
else
retval = arm7_9_execute_sys_speed(target);
if (retval != ERROR_OK)
{
return retval;
}
}
arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 1);
/* advance buffer, count number of accesses */
buffer += thisrun_accesses * 1;
num_accesses += thisrun_accesses;
if ((j++%1024) == 0)
{
keep_alive();
}
}
break;
default:
LOG_ERROR("BUG: we shouldn't get here");
exit(-1);
break;
}
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
for (i = 0; i <= last_reg; i++)
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid;
arm7_9->read_xpsr(target, &cpsr, 0);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
LOG_ERROR("JTAG error while reading cpsr");
return ERROR_TARGET_DATA_ABORT;
}
if (((cpsr & 0x1f) == ARMV4_5_MODE_ABT) && (armv4_5->core_mode != ARMV4_5_MODE_ABT))
{
LOG_WARNING("memory read caused data abort (address: 0x%8.8" PRIx32 ", size: 0x%" PRIx32 ", count: 0x%" PRIx32 ")", address, size, count);
arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
return ERROR_TARGET_DATA_ABORT;
}
return ERROR_OK;
}
int arm7_9_write_memory(struct target *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
uint32_t reg[16];
uint32_t num_accesses = 0;
int thisrun_accesses;
int i;
uint32_t cpsr;
int retval;
int last_reg = 0;
#ifdef _DEBUG_ARM7_9_
LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
#endif
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
/* sanitize arguments */
if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
return ERROR_INVALID_ARGUMENTS;
if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
return ERROR_TARGET_UNALIGNED_ACCESS;
/* load the base register with the address of the first word */
reg[0] = address;
arm7_9->write_core_regs(target, 0x1, reg);
/* Clear DBGACK, to make sure memory fetches work as expected */
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
embeddedice_store_reg(dbg_ctrl);
switch (size)
{
case 4:
while (num_accesses < count)
{
uint32_t reg_list;
thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
for (i = 1; i <= thisrun_accesses; i++)
{
if (i > last_reg)
last_reg = i;
reg[i] = target_buffer_get_u32(target, buffer);
buffer += 4;
}
arm7_9->write_core_regs(target, reg_list, reg);
arm7_9->store_word_regs(target, reg_list);
/* fast memory writes are only safe when the target is running
* from a sufficiently high clock (32 kHz is usually too slow)
*/
if (arm7_9->fast_memory_access)
retval = arm7_9_execute_fast_sys_speed(target);
else
retval = arm7_9_execute_sys_speed(target);
if (retval != ERROR_OK)
{
return retval;
}
num_accesses += thisrun_accesses;
}
break;
case 2:
while (num_accesses < count)
{
uint32_t reg_list;
thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
for (i = 1; i <= thisrun_accesses; i++)
{
if (i > last_reg)
last_reg = i;
reg[i] = target_buffer_get_u16(target, buffer) & 0xffff;
buffer += 2;
}
arm7_9->write_core_regs(target, reg_list, reg);
for (i = 1; i <= thisrun_accesses; i++)
{
arm7_9->store_hword_reg(target, i);
/* fast memory writes are only safe when the target is running
* from a sufficiently high clock (32 kHz is usually too slow)
*/
if (arm7_9->fast_memory_access)
retval = arm7_9_execute_fast_sys_speed(target);
else
retval = arm7_9_execute_sys_speed(target);
if (retval != ERROR_OK)
{
return retval;
}
}
num_accesses += thisrun_accesses;
}
break;
case 1:
while (num_accesses < count)
{
uint32_t reg_list;
thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
for (i = 1; i <= thisrun_accesses; i++)
{
if (i > last_reg)
last_reg = i;
reg[i] = *buffer++ & 0xff;
}
arm7_9->write_core_regs(target, reg_list, reg);
for (i = 1; i <= thisrun_accesses; i++)
{
arm7_9->store_byte_reg(target, i);
/* fast memory writes are only safe when the target is running
* from a sufficiently high clock (32 kHz is usually too slow)
*/
if (arm7_9->fast_memory_access)
retval = arm7_9_execute_fast_sys_speed(target);
else
retval = arm7_9_execute_sys_speed(target);
if (retval != ERROR_OK)
{
return retval;
}
}
num_accesses += thisrun_accesses;
}
break;
default:
LOG_ERROR("BUG: we shouldn't get here");
exit(-1);
break;
}
/* Re-Set DBGACK */
buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
embeddedice_store_reg(dbg_ctrl);
if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
return ERROR_FAIL;
for (i = 0; i <= last_reg; i++)
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid;
arm7_9->read_xpsr(target, &cpsr, 0);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
LOG_ERROR("JTAG error while reading cpsr");
return ERROR_TARGET_DATA_ABORT;
}
if (((cpsr & 0x1f) == ARMV4_5_MODE_ABT) && (armv4_5->core_mode != ARMV4_5_MODE_ABT))
{
LOG_WARNING("memory write caused data abort (address: 0x%8.8" PRIx32 ", size: 0x%" PRIx32 ", count: 0x%" PRIx32 ")", address, size, count);
arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
return ERROR_TARGET_DATA_ABORT;
}
return ERROR_OK;
}
static int dcc_count;
static uint8_t *dcc_buffer;
static int arm7_9_dcc_completion(struct target *target, uint32_t exit_point, int timeout_ms, void *arch_info)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if ((retval = target_wait_state(target, TARGET_DEBUG_RUNNING, 500)) != ERROR_OK)
return retval;
int little = target->endianness == TARGET_LITTLE_ENDIAN;
int count = dcc_count;
uint8_t *buffer = dcc_buffer;
if (count > 2)
{
/* Handle first & last using standard embeddedice_write_reg and the middle ones w/the
* core function repeated. */
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
buffer += 4;
struct embeddedice_reg *ice_reg = arm7_9->eice_cache->reg_list[EICE_COMMS_DATA].arch_info;
uint8_t reg_addr = ice_reg->addr & 0x1f;
struct jtag_tap *tap;
tap = ice_reg->jtag_info->tap;
embeddedice_write_dcc(tap, reg_addr, buffer, little, count-2);
buffer += (count-2)*4;
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
} else
{
int i;
for (i = 0; i < count; i++)
{
embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
buffer += 4;
}
}
if ((retval = target_halt(target))!= ERROR_OK)
{
return retval;
}
return target_wait_state(target, TARGET_HALTED, 500);
}
static const uint32_t dcc_code[] =
{
/* r0 == input, points to memory buffer
* r1 == scratch
*/
/* spin until DCC control (c0) reports data arrived */
0xee101e10, /* w: mrc p14, #0, r1, c0, c0 */
0xe3110001, /* tst r1, #1 */
0x0afffffc, /* bne w */
/* read word from DCC (c1), write to memory */
0xee111e10, /* mrc p14, #0, r1, c1, c0 */
0xe4801004, /* str r1, [r0], #4 */
/* repeat */
0xeafffff9 /* b w */
};
int armv4_5_run_algorithm_inner(struct target *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info, int (*run_it)(struct target *target, uint32_t exit_point, int timeout_ms, void *arch_info));
int arm7_9_bulk_write_memory(struct target *target, uint32_t address, uint32_t count, uint8_t *buffer)
{
int retval;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
int i;
if (!arm7_9->dcc_downloads)
return target_write_memory(target, address, 4, count, buffer);
/* regrab previously allocated working_area, or allocate a new one */
if (!arm7_9->dcc_working_area)
{
uint8_t dcc_code_buf[6 * 4];
/* make sure we have a working area */
if (target_alloc_working_area(target, 24, &arm7_9->dcc_working_area) != ERROR_OK)
{
LOG_INFO("no working area available, falling back to memory writes");
return target_write_memory(target, address, 4, count, buffer);
}
/* copy target instructions to target endianness */
for (i = 0; i < 6; i++)
{
target_buffer_set_u32(target, dcc_code_buf + i*4, dcc_code[i]);
}
/* write DCC code to working area */
if ((retval = target_write_memory(target, arm7_9->dcc_working_area->address, 4, 6, dcc_code_buf)) != ERROR_OK)
{
return retval;
}
}
struct armv4_5_algorithm armv4_5_info;
struct reg_param reg_params[1];
armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
armv4_5_info.core_state = ARMV4_5_STATE_ARM;
init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT);
buf_set_u32(reg_params[0].value, 0, 32, address);
dcc_count = count;
dcc_buffer = buffer;
retval = armv4_5_run_algorithm_inner(target, 0, NULL, 1, reg_params,
arm7_9->dcc_working_area->address, arm7_9->dcc_working_area->address + 6*4, 20*1000, &armv4_5_info, arm7_9_dcc_completion);
if (retval == ERROR_OK)
{
uint32_t endaddress = buf_get_u32(reg_params[0].value, 0, 32);
if (endaddress != (address + count*4))
{
LOG_ERROR("DCC write failed, expected end address 0x%08" PRIx32 " got 0x%0" PRIx32 "", (address + count*4), endaddress);
retval = ERROR_FAIL;
}
}
destroy_reg_param(®_params[0]);
return retval;
}
/**
* Perform per-target setup that requires JTAG access.
*/
int arm7_9_examine(struct target *target)
{
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
int retval;
if (!target_was_examined(target)) {
struct reg_cache *t, **cache_p;
t = embeddedice_build_reg_cache(target, arm7_9);
if (t == NULL)
return ERROR_FAIL;
cache_p = register_get_last_cache_p(&target->reg_cache);
(*cache_p) = t;
arm7_9->eice_cache = (*cache_p);
if (arm7_9->armv4_5_common.etm)
(*cache_p)->next = etm_build_reg_cache(target,
&arm7_9->jtag_info,
arm7_9->armv4_5_common.etm);
target_set_examined(target);
}
retval = embeddedice_setup(target);
if (retval == ERROR_OK)
retval = arm7_9_setup(target);
if (retval == ERROR_OK && arm7_9->armv4_5_common.etm)
retval = etm_setup(target);
return retval;
}
COMMAND_HANDLER(handle_arm7_9_write_xpsr_command)
{
uint32_t value;
int spsr;
int retval;
struct target *target = get_current_target(CMD_CTX);
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (!is_arm7_9(arm7_9))
{
command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
return ERROR_TARGET_INVALID;
}
if (target->state != TARGET_HALTED)
{
command_print(CMD_CTX, "can't write registers while running");
return ERROR_FAIL;
}
if (CMD_ARGC < 2)
{
command_print(CMD_CTX, "usage: write_xpsr <value> <not cpsr | spsr>");
return ERROR_FAIL;
}
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], value);
COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], spsr);
/* if we're writing the CPSR, mask the T bit */
if (!spsr)
value &= ~0x20;
arm7_9->write_xpsr(target, value, spsr);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
LOG_ERROR("JTAG error while writing to xpsr");
return retval;
}
return ERROR_OK;
}
COMMAND_HANDLER(handle_arm7_9_write_xpsr_im8_command)
{
uint32_t value;
int rotate;
int spsr;
int retval;
struct target *target = get_current_target(CMD_CTX);
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (!is_arm7_9(arm7_9))
{
command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
return ERROR_TARGET_INVALID;
}
if (target->state != TARGET_HALTED)
{
command_print(CMD_CTX, "can't write registers while running");
return ERROR_FAIL;
}
if (CMD_ARGC < 3)
{
command_print(CMD_CTX, "usage: write_xpsr_im8 <im8> <rotate> <not cpsr | spsr>");
return ERROR_FAIL;
}
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], value);
COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], rotate);
COMMAND_PARSE_NUMBER(int, CMD_ARGV[2], spsr);
arm7_9->write_xpsr_im8(target, value, rotate, spsr);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
LOG_ERROR("JTAG error while writing 8-bit immediate to xpsr");
return retval;
}
return ERROR_OK;
}
COMMAND_HANDLER(handle_arm7_9_write_core_reg_command)
{
uint32_t value;
uint32_t mode;
int num;
struct target *target = get_current_target(CMD_CTX);
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (!is_arm7_9(arm7_9))
{
command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
return ERROR_TARGET_INVALID;
}
if (target->state != TARGET_HALTED)
{
command_print(CMD_CTX, "can't write registers while running");
return ERROR_FAIL;
}
if (CMD_ARGC < 3)
{
command_print(CMD_CTX, "usage: write_core_reg <num> <mode> <value>");
return ERROR_FAIL;
}
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], num);
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], mode);
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], value);
return arm7_9_write_core_reg(target, num, mode, value);
}
COMMAND_HANDLER(handle_arm7_9_dbgrq_command)
{
struct target *target = get_current_target(CMD_CTX);
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (!is_arm7_9(arm7_9))
{
command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
return ERROR_TARGET_INVALID;
}
if (CMD_ARGC > 0)
{
if (strcmp("enable", CMD_ARGV[0]) == 0)
{
arm7_9->use_dbgrq = 1;
}
else if (strcmp("disable", CMD_ARGV[0]) == 0)
{
arm7_9->use_dbgrq = 0;
}
else
{
command_print(CMD_CTX, "usage: arm7_9 dbgrq <enable | disable>");
}
}
command_print(CMD_CTX, "use of EmbeddedICE dbgrq instead of breakpoint for target halt %s", (arm7_9->use_dbgrq) ? "enabled" : "disabled");
return ERROR_OK;
}
COMMAND_HANDLER(handle_arm7_9_fast_memory_access_command)
{
struct target *target = get_current_target(CMD_CTX);
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (!is_arm7_9(arm7_9))
{
command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
return ERROR_TARGET_INVALID;
}
if (CMD_ARGC > 0)
{
if (strcmp("enable", CMD_ARGV[0]) == 0)
{
arm7_9->fast_memory_access = 1;
}
else if (strcmp("disable", CMD_ARGV[0]) == 0)
{
arm7_9->fast_memory_access = 0;
}
else
{
command_print(CMD_CTX, "usage: arm7_9 fast_memory_access <enable | disable>");
}
}
command_print(CMD_CTX, "fast memory access is %s", (arm7_9->fast_memory_access) ? "enabled" : "disabled");
return ERROR_OK;
}
COMMAND_HANDLER(handle_arm7_9_dcc_downloads_command)
{
struct target *target = get_current_target(CMD_CTX);
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
if (!is_arm7_9(arm7_9))
{
command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
return ERROR_TARGET_INVALID;
}
if (CMD_ARGC > 0)
{
if (strcmp("enable", CMD_ARGV[0]) == 0)
{
arm7_9->dcc_downloads = 1;
}
else if (strcmp("disable", CMD_ARGV[0]) == 0)
{
arm7_9->dcc_downloads = 0;
}
else
{
command_print(CMD_CTX, "usage: arm7_9 dcc_downloads <enable | disable>");
}
}
command_print(CMD_CTX, "dcc downloads are %s", (arm7_9->dcc_downloads) ? "enabled" : "disabled");
return ERROR_OK;
}
int arm7_9_init_arch_info(struct target *target, struct arm7_9_common *arm7_9)
{
int retval = ERROR_OK;
struct arm *armv4_5 = &arm7_9->armv4_5_common;
arm7_9->common_magic = ARM7_9_COMMON_MAGIC;
if ((retval = arm_jtag_setup_connection(&arm7_9->jtag_info)) != ERROR_OK)
return retval;
/* caller must have allocated via calloc(), so everything's zeroed */
arm7_9->wp_available_max = 2;
arm7_9->fast_memory_access = fast_and_dangerous;
arm7_9->dcc_downloads = fast_and_dangerous;
armv4_5->arch_info = arm7_9;
armv4_5->read_core_reg = arm7_9_read_core_reg;
armv4_5->write_core_reg = arm7_9_write_core_reg;
armv4_5->full_context = arm7_9_full_context;
if ((retval = armv4_5_init_arch_info(target, armv4_5)) != ERROR_OK)
return retval;
return target_register_timer_callback(arm7_9_handle_target_request,
1, 1, target);
}
int arm7_9_register_commands(struct command_context *cmd_ctx)
{
struct command *arm7_9_cmd;
arm7_9_cmd = register_command(cmd_ctx, NULL, "arm7_9",
NULL, COMMAND_ANY, "arm7/9 specific commands");
register_command(cmd_ctx, arm7_9_cmd, "write_xpsr",
handle_arm7_9_write_xpsr_command, COMMAND_EXEC,
"write program status register <value> <not cpsr | spsr>");
register_command(cmd_ctx, arm7_9_cmd, "write_xpsr_im8",
handle_arm7_9_write_xpsr_im8_command, COMMAND_EXEC,
"write program status register "
"<8bit immediate> <rotate> <not cpsr | spsr>");
register_command(cmd_ctx, arm7_9_cmd, "write_core_reg",
handle_arm7_9_write_core_reg_command, COMMAND_EXEC,
"write core register <num> <mode> <value>");
register_command(cmd_ctx, arm7_9_cmd, "dbgrq",
handle_arm7_9_dbgrq_command, COMMAND_ANY,
"use EmbeddedICE dbgrq instead of breakpoint "
"for target halt requests <enable | disable>");
register_command(cmd_ctx, arm7_9_cmd, "fast_memory_access",
handle_arm7_9_fast_memory_access_command, COMMAND_ANY,
"use fast memory accesses instead of slower "
"but potentially safer accesses <enable | disable>");
register_command(cmd_ctx, arm7_9_cmd, "dcc_downloads",
handle_arm7_9_dcc_downloads_command, COMMAND_ANY,
"use DCC downloads for larger memory writes <enable | disable>");
armv4_5_register_commands(cmd_ctx);
etm_register_commands(cmd_ctx);
return ERROR_OK;
}
|