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
|
u32 SCRIPT[] = {
/*
; NCR 53c810 driver, main script
; Sponsored by
; iX Multiuser Multitasking Magazine
; hm@ix.de
;
; Copyright 1993, 1994, 1995 Drew Eckhardt
; Visionary Computing
; (Unix and Linux consulting and custom programming)
; drew@PoohSticks.ORG
; +1 (303) 786-7975
;
; TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
;
; PRE-ALPHA
;
; For more information, please consult
;
; NCR 53C810
; PCI-SCSI I/O Processor
; Data Manual
;
; NCR 53C710
; SCSI I/O Processor
; Programmers Guide
;
; NCR Microelectronics
; 1635 Aeroplaza Drive
; Colorado Springs, CO 80916
; 1+ (719) 578-3400
;
; Toll free literature number
; +1 (800) 334-5454
;
; IMPORTANT : This code is self modifying due to the limitations of
; the NCR53c7,8xx series chips. Persons debugging this code with
; the remote debugger should take this into account, and NOT set
; breakpoints in modified instructions.
;
; Design:
; The NCR53c7,8xx family of SCSI chips are busmasters with an onboard
; microcontroller using a simple instruction set.
;
; So, to minimize the effects of interrupt latency, and to maximize
; throughput, this driver offloads the practical maximum amount
; of processing to the SCSI chip while still maintaining a common
; structure.
;
; Where tradeoffs were needed between efficiency on the older
; chips and the newer NCR53c800 series, the NCR53c800 series
; was chosen.
;
; While the NCR53c700 and NCR53c700-66 lacked the facilities to fully
; automate SCSI transfers without host processor intervention, this
; isn't the case with the NCR53c710 and newer chips which allow
;
; - reads and writes to the internal registers from within the SCSI
; scripts, allowing the SCSI SCRIPTS(tm) code to save processor
; state so that multiple threads of execution are possible, and also
; provide an ALU for loop control, etc.
;
; - table indirect addressing for some instructions. This allows
; pointers to be located relative to the DSA ((Data Structure
; Address) register.
;
; These features make it possible to implement a mailbox style interface,
; where the same piece of code is run to handle I/O for multiple threads
; at once minimizing our need to relocate code. Since the NCR53c700/
; NCR53c800 series have a unique combination of features, making a
; a standard ingoing/outgoing mailbox system, costly, I've modified it.
;
; - Mailboxes are a mixture of code and data. This lets us greatly
; simplify the NCR53c810 code and do things that would otherwise
; not be possible.
;
; The saved data pointer is now implemented as follows :
;
; Control flow has been architected such that if control reaches
; munge_save_data_pointer, on a restore pointers message or
; reconnection, a jump to the address formerly in the TEMP register
; will allow the SCSI command to resume execution.
;
;
; Note : the DSA structures must be aligned on 32 bit boundaries,
; since the source and destination of MOVE MEMORY instructions
; must share the same alignment and this is the alignment of the
; NCR registers.
;
ABSOLUTE dsa_temp_lun = 0 ; Patch to lun for current dsa
ABSOLUTE dsa_temp_next = 0 ; Patch to dsa next for current dsa
ABSOLUTE dsa_temp_addr_next = 0 ; Patch to address of dsa next address
; for current dsa
ABSOLUTE dsa_temp_sync = 0 ; Patch to address of per-target
; sync routine
ABSOLUTE dsa_temp_target = 0 ; Patch to id for current dsa
ABSOLUTE dsa_temp_addr_saved_pointer = 0; Patch to address of per-command
; saved data pointer
ABSOLUTE dsa_temp_addr_residual = 0 ; Patch to address of per-command
; current residual code
ABSOLUTE dsa_temp_addr_saved_residual = 0; Patch to address of per-command
; saved residual code
ABSOLUTE dsa_temp_addr_new_value = 0 ; Address of value for JUMP operand
ABSOLUTE dsa_temp_addr_array_value = 0 ; Address to copy to
ABSOLUTE dsa_temp_addr_dsa_value = 0 ; Address of this DSA value
;
; Once a device has initiated reselection, we need to compare it
; against the singly linked list of commands which have disconnected
; and are pending reselection. These commands are maintained in
; an unordered singly linked list of DSA structures, through the
; DSA pointers at their 'centers' headed by the reconnect_dsa_head
; pointer.
;
; To avoid complications in removing commands from the list,
; I minimize the amount of expensive (at eight operations per
; addition @ 500-600ns each) pointer operations which must
; be done in the NCR driver by precomputing them on the
; host processor during dsa structure generation.
;
; The fixed-up per DSA code knows how to recognize the nexus
; associated with the corresponding SCSI command, and modifies
; the source and destination pointers for the MOVE MEMORY
; instruction which is executed when reselected_ok is called
; to remove the command from the list. Similarly, DSA is
; loaded with the address of the next DSA structure and
; reselected_check_next is called if a failure occurs.
;
; Perhaps more concisely, the net effect of the mess is
;
; for (dsa = reconnect_dsa_head, dest = &reconnect_dsa_head,
; src = NULL; dsa; dest = &dsa->next, dsa = dsa->next) {
; src = &dsa->next;
; if (target_id == dsa->id && target_lun == dsa->lun) {
; *dest = *src;
; break;
; }
; }
;
; if (!dsa)
; error (int_err_unexpected_reselect);
; else
; longjmp (dsa->jump_resume, 0);
;
;
; Define DSA structure used for mailboxes
ENTRY dsa_code_template
dsa_code_template:
ENTRY dsa_code_begin
dsa_code_begin:
MOVE dmode_memory_to_ncr TO DMODE
at 0x00000000 : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, dsa_temp_addr_dsa_value, addr_scratch
at 0x00000002 : */ 0xc0000004,0x00000000,0x00000000,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x00000005 : */ 0x78380000,0x00000000,
/*
CALL scratch_to_dsa
at 0x00000007 : */ 0x88080000,0x00000980,
/*
CALL select
at 0x00000009 : */ 0x88080000,0x000001fc,
/*
; Handle the phase mismatch which may have resulted from the
; MOVE FROM dsa_msgout if we returned here. The CLEAR ATN
; may or may not be necessary, and we should update script_asm.pl
; to handle multiple pieces.
CLEAR ATN
at 0x0000000b : */ 0x60000008,0x00000000,
/*
CLEAR ACK
at 0x0000000d : */ 0x60000040,0x00000000,
/*
; Replace second operand with address of JUMP instruction dest operand
; in schedule table for this DSA. Becomes dsa_jump_dest in 53c7,8xx.c.
ENTRY dsa_code_fix_jump
dsa_code_fix_jump:
MOVE MEMORY 4, NOP_insn, 0
at 0x0000000f : */ 0xc0000004,0x00000000,0x00000000,
/*
JUMP select_done
at 0x00000012 : */ 0x80080000,0x00000224,
/*
; wrong_dsa loads the DSA register with the value of the dsa_next
; field.
;
wrong_dsa:
; Patch the MOVE MEMORY INSTRUCTION such that
; the destination address is the address of the OLD
; next pointer.
;
MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok + 8
at 0x00000014 : */ 0xc0000004,0x00000000,0x00000758,
/*
MOVE dmode_memory_to_ncr TO DMODE
at 0x00000017 : */ 0x78380000,0x00000000,
/*
;
; Move the _contents_ of the next pointer into the DSA register as
; the next I_T_L or I_T_L_Q tupple to check against the established
; nexus.
;
MOVE MEMORY 4, dsa_temp_next, addr_scratch
at 0x00000019 : */ 0xc0000004,0x00000000,0x00000000,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x0000001c : */ 0x78380000,0x00000000,
/*
CALL scratch_to_dsa
at 0x0000001e : */ 0x88080000,0x00000980,
/*
JUMP reselected_check_next
at 0x00000020 : */ 0x80080000,0x000006a4,
/*
ABSOLUTE dsa_save_data_pointer = 0
ENTRY dsa_code_save_data_pointer
dsa_code_save_data_pointer:
MOVE dmode_ncr_to_memory TO DMODE
at 0x00000022 : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, addr_temp, dsa_temp_addr_saved_pointer
at 0x00000024 : */ 0xc0000004,0x00000000,0x00000000,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x00000027 : */ 0x78380000,0x00000000,
/*
; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h
MOVE MEMORY 24, dsa_temp_addr_residual, dsa_temp_addr_saved_residual
at 0x00000029 : */ 0xc0000018,0x00000000,0x00000000,
/*
CLEAR ACK
at 0x0000002c : */ 0x60000040,0x00000000,
/*
RETURN
at 0x0000002e : */ 0x90080000,0x00000000,
/*
ABSOLUTE dsa_restore_pointers = 0
ENTRY dsa_code_restore_pointers
dsa_code_restore_pointers:
MOVE dmode_memory_to_ncr TO DMODE
at 0x00000030 : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, dsa_temp_addr_saved_pointer, addr_temp
at 0x00000032 : */ 0xc0000004,0x00000000,0x00000000,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x00000035 : */ 0x78380000,0x00000000,
/*
; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h
MOVE MEMORY 24, dsa_temp_addr_saved_residual, dsa_temp_addr_residual
at 0x00000037 : */ 0xc0000018,0x00000000,0x00000000,
/*
CLEAR ACK
at 0x0000003a : */ 0x60000040,0x00000000,
/*
RETURN
at 0x0000003c : */ 0x90080000,0x00000000,
/*
ABSOLUTE dsa_check_reselect = 0
; dsa_check_reselect determines whether or not the current target and
; lun match the current DSA
ENTRY dsa_code_check_reselect
dsa_code_check_reselect:
MOVE SSID TO SFBR ; SSID contains 3 bit target ID
at 0x0000003e : */ 0x720a0000,0x00000000,
/*
; FIXME : we need to accommodate bit fielded and binary here for '7xx/'8xx chips
JUMP REL (wrong_dsa), IF NOT dsa_temp_target, AND MASK 0xf8
at 0x00000040 : */ 0x8084f800,0x00ffff48,
/*
;
; Hack - move to scratch first, since SFBR is not writeable
; via the CPU and hence a MOVE MEMORY instruction.
;
MOVE dmode_memory_to_ncr TO DMODE
at 0x00000042 : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 1, reselected_identify, addr_scratch
at 0x00000044 : */ 0xc0000001,0x00000000,0x00000000,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x00000047 : */ 0x78380000,0x00000000,
/*
MOVE SCRATCH0 TO SFBR
at 0x00000049 : */ 0x72340000,0x00000000,
/*
; FIXME : we need to accommodate bit fielded and binary here for '7xx/'8xx chips
JUMP REL (wrong_dsa), IF NOT dsa_temp_lun, AND MASK 0xf8
at 0x0000004b : */ 0x8084f800,0x00ffff1c,
/*
; Patch the MOVE MEMORY INSTRUCTION such that
; the source address is the address of this dsa's
; next pointer.
MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok + 4
at 0x0000004d : */ 0xc0000004,0x00000000,0x00000754,
/*
CALL reselected_ok
at 0x00000050 : */ 0x88080000,0x00000750,
/*
CALL dsa_temp_sync
at 0x00000052 : */ 0x88080000,0x00000000,
/*
; Release ACK on the IDENTIFY message _after_ we've set the synchronous
; transfer parameters!
CLEAR ACK
at 0x00000054 : */ 0x60000040,0x00000000,
/*
; Implicitly restore pointers on reselection, so a RETURN
; will transfer control back to the right spot.
CALL REL (dsa_code_restore_pointers)
at 0x00000056 : */ 0x88880000,0x00ffff60,
/*
RETURN
at 0x00000058 : */ 0x90080000,0x00000000,
/*
ENTRY dsa_zero
dsa_zero:
ENTRY dsa_code_template_end
dsa_code_template_end:
; Perform sanity check for dsa_fields_start == dsa_code_template_end -
; dsa_zero, puke.
ABSOLUTE dsa_fields_start = 0 ; Sanity marker
; pad 48 bytes (fix this RSN)
ABSOLUTE dsa_next = 48 ; len 4 Next DSA
; del 4 Previous DSA address
ABSOLUTE dsa_cmnd = 56 ; len 4 Scsi_Cmnd * for this thread.
ABSOLUTE dsa_select = 60 ; len 4 Device ID, Period, Offset for
; table indirect select
ABSOLUTE dsa_msgout = 64 ; len 8 table indirect move parameter for
; select message
ABSOLUTE dsa_cmdout = 72 ; len 8 table indirect move parameter for
; command
ABSOLUTE dsa_dataout = 80 ; len 4 code pointer for dataout
ABSOLUTE dsa_datain = 84 ; len 4 code pointer for datain
ABSOLUTE dsa_msgin = 88 ; len 8 table indirect move for msgin
ABSOLUTE dsa_status = 96 ; len 8 table indirect move for status byte
ABSOLUTE dsa_msgout_other = 104 ; len 8 table indirect for normal message out
; (Synchronous transfer negotiation, etc).
ABSOLUTE dsa_end = 112
ABSOLUTE schedule = 0 ; Array of JUMP dsa_begin or JUMP (next),
; terminated by a call to JUMP wait_reselect
; Linked lists of DSA structures
ABSOLUTE reconnect_dsa_head = 0 ; Link list of DSAs which can reconnect
ABSOLUTE addr_reconnect_dsa_head = 0 ; Address of variable containing
; address of reconnect_dsa_head
; These select the source and destination of a MOVE MEMORY instruction
ABSOLUTE dmode_memory_to_memory = 0x0
ABSOLUTE dmode_memory_to_ncr = 0x0
ABSOLUTE dmode_ncr_to_memory = 0x0
ABSOLUTE addr_scratch = 0x0
ABSOLUTE addr_temp = 0x0
; Interrupts -
; MSB indicates type
; 0 handle error condition
; 1 handle message
; 2 handle normal condition
; 3 debugging interrupt
; 4 testing interrupt
; Next byte indicates specific error
; XXX not yet implemented, I'm not sure if I want to -
; Next byte indicates the routine the error occurred in
; The LSB indicates the specific place the error occurred
ABSOLUTE int_err_unexpected_phase = 0x00000000 ; Unexpected phase encountered
ABSOLUTE int_err_selected = 0x00010000 ; SELECTED (nee RESELECTED)
ABSOLUTE int_err_unexpected_reselect = 0x00020000
ABSOLUTE int_err_check_condition = 0x00030000
ABSOLUTE int_err_no_phase = 0x00040000
ABSOLUTE int_msg_wdtr = 0x01000000 ; WDTR message received
ABSOLUTE int_msg_sdtr = 0x01010000 ; SDTR received
ABSOLUTE int_msg_1 = 0x01020000 ; single byte special message
; received
ABSOLUTE int_norm_select_complete = 0x02000000 ; Select complete, reprogram
; registers.
ABSOLUTE int_norm_reselect_complete = 0x02010000 ; Nexus established
ABSOLUTE int_norm_command_complete = 0x02020000 ; Command complete
ABSOLUTE int_norm_disconnected = 0x02030000 ; Disconnected
ABSOLUTE int_norm_aborted =0x02040000 ; Aborted *dsa
ABSOLUTE int_norm_reset = 0x02050000 ; Generated BUS reset.
ABSOLUTE int_debug_break = 0x03000000 ; Break point
ABSOLUTE int_debug_panic = 0x030b0000 ; Panic driver
ABSOLUTE int_test_1 = 0x04000000 ; Test 1 complete
ABSOLUTE int_test_2 = 0x04010000 ; Test 2 complete
ABSOLUTE int_test_3 = 0x04020000 ; Test 3 complete
; These should start with 0x05000000, with low bits incrementing for
; each one.
ABSOLUTE NCR53c7xx_msg_abort = 0 ; Pointer to abort message
ABSOLUTE NCR53c7xx_msg_reject = 0 ; Pointer to reject message
ABSOLUTE NCR53c7xx_zero = 0 ; long with zero in it, use for source
ABSOLUTE NCR53c7xx_sink = 0 ; long to dump worthless data in
ABSOLUTE NOP_insn = 0 ; NOP instruction
; Pointer to message, potentially multi-byte
ABSOLUTE msg_buf = 0
; Pointer to holding area for reselection information
ABSOLUTE reselected_identify = 0
ABSOLUTE reselected_tag = 0
; Request sense command pointer, it's a 6 byte command, should
; be constant for all commands since we always want 16 bytes of
; sense and we don't need to change any fields as we did under
; SCSI-I when we actually cared about the LUN field.
;EXTERNAL NCR53c7xx_sense ; Request sense command
; dsa_schedule
; PURPOSE : after a DISCONNECT message has been received, and pointers
; saved, insert the current DSA structure at the head of the
; disconnected queue and fall through to the scheduler.
;
; CALLS : OK
;
; INPUTS : dsa - current DSA structure, reconnect_dsa_head - list
; of disconnected commands
;
; MODIFIES : SCRATCH, reconnect_dsa_head
;
; EXITS : always passes control to schedule
ENTRY dsa_schedule
dsa_schedule:
;
; Calculate the address of the next pointer within the DSA
; structure of the command that is currently disconnecting
;
CALL dsa_to_scratch
at 0x0000005a : */ 0x88080000,0x00000938,
/*
MOVE SCRATCH0 + dsa_next TO SCRATCH0
at 0x0000005c : */ 0x7e343000,0x00000000,
/*
MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY
at 0x0000005e : */ 0x7f350000,0x00000000,
/*
MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY
at 0x00000060 : */ 0x7f360000,0x00000000,
/*
MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY
at 0x00000062 : */ 0x7f370000,0x00000000,
/*
; Point the next field of this DSA structure at the current disconnected
; list
MOVE dmode_ncr_to_memory TO DMODE
at 0x00000064 : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, addr_scratch, dsa_schedule_insert + 8
at 0x00000066 : */ 0xc0000004,0x00000000,0x000001b4,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x00000069 : */ 0x78380000,0x00000000,
/*
dsa_schedule_insert:
MOVE MEMORY 4, reconnect_dsa_head, 0
at 0x0000006b : */ 0xc0000004,0x00000000,0x00000000,
/*
; And update the head pointer.
CALL dsa_to_scratch
at 0x0000006e : */ 0x88080000,0x00000938,
/*
MOVE dmode_ncr_to_memory TO DMODE
at 0x00000070 : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, addr_scratch, reconnect_dsa_head
at 0x00000072 : */ 0xc0000004,0x00000000,0x00000000,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x00000075 : */ 0x78380000,0x00000000,
/*
MOVE SCNTL2 & 0x7f TO SCNTL2
at 0x00000077 : */ 0x7c027f00,0x00000000,
/*
CLEAR ACK
at 0x00000079 : */ 0x60000040,0x00000000,
/*
WAIT DISCONNECT
at 0x0000007b : */ 0x48000000,0x00000000,
/*
JUMP schedule
at 0x0000007d : */ 0x80080000,0x00000000,
/*
;
; select
;
; PURPOSE : establish a nexus for the SCSI command referenced by DSA.
; On success, the current DSA structure is removed from the issue
; queue. Usually, this is entered as a fall-through from schedule,
; although the contingent allegiance handling code will write
; the select entry address to the DSP to restart a command as a
; REQUEST SENSE. A message is sent (usually IDENTIFY, although
; additional SDTR or WDTR messages may be sent). COMMAND OUT
; is handled.
;
; INPUTS : DSA - SCSI command, issue_dsa_head
;
; CALLS : NOT OK
;
; MODIFIES : SCRATCH, issue_dsa_head
;
; EXITS : on reselection or selection, go to select_failed
; otherwise, RETURN so control is passed back to
; dsa_begin.
;
ENTRY select
select:
CLEAR TARGET
at 0x0000007f : */ 0x60000200,0x00000000,
/*
; XXX
;
; In effect, SELECTION operations are backgrounded, with execution
; continuing until code which waits for REQ or a fatal interrupt is
; encountered.
;
; So, for more performance, we could overlap the code which removes
; the command from the NCRs issue queue with the selection, but
; at this point I don't want to deal with the error recovery.
;
SELECT ATN FROM dsa_select, select_failed
at 0x00000081 : */ 0x4300003c,0x000007a4,
/*
JUMP select_msgout, WHEN MSG_OUT
at 0x00000083 : */ 0x860b0000,0x00000214,
/*
ENTRY select_msgout
select_msgout:
MOVE FROM dsa_msgout, WHEN MSG_OUT
at 0x00000085 : */ 0x1e000000,0x00000040,
/*
RETURN
at 0x00000087 : */ 0x90080000,0x00000000,
/*
;
; select_done
;
; PURPOSE: continue on to normal data transfer; called as the exit
; point from dsa_begin.
;
; INPUTS: dsa
;
; CALLS: OK
;
;
select_done:
; After a successful selection, we should get either a CMD phase or
; some transfer request negotiation message.
JUMP cmdout, WHEN CMD
at 0x00000089 : */ 0x820b0000,0x00000244,
/*
INT int_err_unexpected_phase, WHEN NOT MSG_IN
at 0x0000008b : */ 0x9f030000,0x00000000,
/*
select_msg_in:
CALL msg_in, WHEN MSG_IN
at 0x0000008d : */ 0x8f0b0000,0x00000404,
/*
JUMP select_msg_in, WHEN MSG_IN
at 0x0000008f : */ 0x870b0000,0x00000234,
/*
cmdout:
INT int_err_unexpected_phase, WHEN NOT CMD
at 0x00000091 : */ 0x9a030000,0x00000000,
/*
ENTRY cmdout_cmdout
cmdout_cmdout:
MOVE FROM dsa_cmdout, WHEN CMD
at 0x00000093 : */ 0x1a000000,0x00000048,
/*
;
; data_transfer
; other_out
; other_in
; other_transfer
;
; PURPOSE : handle the main data transfer for a SCSI command in
; several parts. In the first part, data_transfer, DATA_IN
; and DATA_OUT phases are allowed, with the user provided
; code (usually dynamically generated based on the scatter/gather
; list associated with a SCSI command) called to handle these
; phases.
;
; After control has passed to one of the user provided
; DATA_IN or DATA_OUT routines, back calls are made to
; other_transfer_in or other_transfer_out to handle non-DATA IN
; and DATA OUT phases respectively, with the state of the active
; data pointer being preserved in TEMP.
;
; On completion, the user code passes control to other_transfer
; which causes DATA_IN and DATA_OUT to result in unexpected_phase
; interrupts so that data overruns may be trapped.
;
; INPUTS : DSA - SCSI command
;
; CALLS : OK in data_transfer_start, not ok in other_out and other_in, ok in
; other_transfer
;
; MODIFIES : SCRATCH
;
; EXITS : if STATUS IN is detected, signifying command completion,
; the NCR jumps to command_complete. If MSG IN occurs, a
; CALL is made to msg_in. Otherwise, other_transfer runs in
; an infinite loop.
;
ENTRY data_transfer
data_transfer:
JUMP cmdout_cmdout, WHEN CMD
at 0x00000095 : */ 0x820b0000,0x0000024c,
/*
CALL msg_in, WHEN MSG_IN
at 0x00000097 : */ 0x8f0b0000,0x00000404,
/*
INT int_err_unexpected_phase, WHEN MSG_OUT
at 0x00000099 : */ 0x9e0b0000,0x00000000,
/*
JUMP do_dataout, WHEN DATA_OUT
at 0x0000009b : */ 0x800b0000,0x0000028c,
/*
JUMP do_datain, WHEN DATA_IN
at 0x0000009d : */ 0x810b0000,0x000002e4,
/*
JUMP command_complete, WHEN STATUS
at 0x0000009f : */ 0x830b0000,0x0000060c,
/*
JUMP data_transfer
at 0x000000a1 : */ 0x80080000,0x00000254,
/*
ENTRY end_data_transfer
end_data_transfer:
;
; FIXME: On NCR53c700 and NCR53c700-66 chips, do_dataout/do_datain
; should be fixed up whenever the nexus changes so it can point to the
; correct routine for that command.
;
; Nasty jump to dsa->dataout
do_dataout:
CALL dsa_to_scratch
at 0x000000a3 : */ 0x88080000,0x00000938,
/*
MOVE SCRATCH0 + dsa_dataout TO SCRATCH0
at 0x000000a5 : */ 0x7e345000,0x00000000,
/*
MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY
at 0x000000a7 : */ 0x7f350000,0x00000000,
/*
MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY
at 0x000000a9 : */ 0x7f360000,0x00000000,
/*
MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY
at 0x000000ab : */ 0x7f370000,0x00000000,
/*
MOVE dmode_ncr_to_memory TO DMODE
at 0x000000ad : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, addr_scratch, dataout_to_jump + 4
at 0x000000af : */ 0xc0000004,0x00000000,0x000002d4,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x000000b2 : */ 0x78380000,0x00000000,
/*
dataout_to_jump:
MOVE MEMORY 4, 0, dataout_jump + 4
at 0x000000b4 : */ 0xc0000004,0x00000000,0x000002e0,
/*
dataout_jump:
JUMP 0
at 0x000000b7 : */ 0x80080000,0x00000000,
/*
; Nasty jump to dsa->dsain
do_datain:
CALL dsa_to_scratch
at 0x000000b9 : */ 0x88080000,0x00000938,
/*
MOVE SCRATCH0 + dsa_datain TO SCRATCH0
at 0x000000bb : */ 0x7e345400,0x00000000,
/*
MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY
at 0x000000bd : */ 0x7f350000,0x00000000,
/*
MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY
at 0x000000bf : */ 0x7f360000,0x00000000,
/*
MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY
at 0x000000c1 : */ 0x7f370000,0x00000000,
/*
MOVE dmode_ncr_to_memory TO DMODE
at 0x000000c3 : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, addr_scratch, datain_to_jump + 4
at 0x000000c5 : */ 0xc0000004,0x00000000,0x0000032c,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x000000c8 : */ 0x78380000,0x00000000,
/*
ENTRY datain_to_jump
datain_to_jump:
MOVE MEMORY 4, 0, datain_jump + 4
at 0x000000ca : */ 0xc0000004,0x00000000,0x00000338,
/*
datain_jump:
JUMP 0
at 0x000000cd : */ 0x80080000,0x00000000,
/*
; Note that other_out and other_in loop until a non-data phase
; is discovered, so we only execute return statements when we
; can go on to the next data phase block move statement.
ENTRY other_out
other_out:
INT int_err_unexpected_phase, WHEN CMD
at 0x000000cf : */ 0x9a0b0000,0x00000000,
/*
JUMP msg_in_restart, WHEN MSG_IN
at 0x000000d1 : */ 0x870b0000,0x000003e4,
/*
INT int_err_unexpected_phase, WHEN MSG_OUT
at 0x000000d3 : */ 0x9e0b0000,0x00000000,
/*
INT int_err_unexpected_phase, WHEN DATA_IN
at 0x000000d5 : */ 0x990b0000,0x00000000,
/*
JUMP command_complete, WHEN STATUS
at 0x000000d7 : */ 0x830b0000,0x0000060c,
/*
JUMP other_out, WHEN NOT DATA_OUT
at 0x000000d9 : */ 0x80030000,0x0000033c,
/*
RETURN
at 0x000000db : */ 0x90080000,0x00000000,
/*
ENTRY other_in
other_in:
INT int_err_unexpected_phase, WHEN CMD
at 0x000000dd : */ 0x9a0b0000,0x00000000,
/*
JUMP msg_in_restart, WHEN MSG_IN
at 0x000000df : */ 0x870b0000,0x000003e4,
/*
INT int_err_unexpected_phase, WHEN MSG_OUT
at 0x000000e1 : */ 0x9e0b0000,0x00000000,
/*
INT int_err_unexpected_phase, WHEN DATA_OUT
at 0x000000e3 : */ 0x980b0000,0x00000000,
/*
JUMP command_complete, WHEN STATUS
at 0x000000e5 : */ 0x830b0000,0x0000060c,
/*
JUMP other_in, WHEN NOT DATA_IN
at 0x000000e7 : */ 0x81030000,0x00000374,
/*
RETURN
at 0x000000e9 : */ 0x90080000,0x00000000,
/*
ENTRY other_transfer
other_transfer:
INT int_err_unexpected_phase, WHEN CMD
at 0x000000eb : */ 0x9a0b0000,0x00000000,
/*
CALL msg_in, WHEN MSG_IN
at 0x000000ed : */ 0x8f0b0000,0x00000404,
/*
INT int_err_unexpected_phase, WHEN MSG_OUT
at 0x000000ef : */ 0x9e0b0000,0x00000000,
/*
INT int_err_unexpected_phase, WHEN DATA_OUT
at 0x000000f1 : */ 0x980b0000,0x00000000,
/*
INT int_err_unexpected_phase, WHEN DATA_IN
at 0x000000f3 : */ 0x990b0000,0x00000000,
/*
JUMP command_complete, WHEN STATUS
at 0x000000f5 : */ 0x830b0000,0x0000060c,
/*
JUMP other_transfer
at 0x000000f7 : */ 0x80080000,0x000003ac,
/*
;
; msg_in_restart
; msg_in
; munge_msg
;
; PURPOSE : process messages from a target. msg_in is called when the
; caller hasn't read the first byte of the message. munge_message
; is called when the caller has read the first byte of the message,
; and left it in SFBR. msg_in_restart is called when the caller
; hasn't read the first byte of the message, and wishes RETURN
; to transfer control back to the address of the conditional
; CALL instruction rather than to the instruction after it.
;
; Various int_* interrupts are generated when the host system
; needs to intervene, as is the case with SDTR, WDTR, and
; INITIATE RECOVERY messages.
;
; When the host system handles one of these interrupts,
; it can respond by reentering at reject_message,
; which rejects the message and returns control to
; the caller of msg_in or munge_msg, accept_message
; which clears ACK and returns control, or reply_message
; which sends the message pointed to by the DSA
; msgout_other table indirect field.
;
; DISCONNECT messages are handled by moving the command
; to the reconnect_dsa_queue.
;
; INPUTS : DSA - SCSI COMMAND, SFBR - first byte of message (munge_msg
; only)
;
; CALLS : NO. The TEMP register isn't backed up to allow nested calls.
;
; MODIFIES : SCRATCH, DSA on DISCONNECT
;
; EXITS : On receipt of SAVE DATA POINTER, RESTORE POINTERS,
; and normal return from message handlers running under
; Linux, control is returned to the caller. Receipt
; of DISCONNECT messages pass control to dsa_schedule.
;
ENTRY msg_in_restart
msg_in_restart:
; XXX - hackish
;
; Since it's easier to debug changes to the statically
; compiled code, rather than the dynamically generated
; stuff, such as
;
; MOVE x, y, WHEN data_phase
; CALL other_z, WHEN NOT data_phase
; MOVE x, y, WHEN data_phase
;
; I'd like to have certain routines (notably the message handler)
; restart on the conditional call rather than the next instruction.
;
; So, subtract 8 from the return address
MOVE TEMP0 + 0xf8 TO TEMP0
at 0x000000f9 : */ 0x7e1cf800,0x00000000,
/*
MOVE TEMP1 + 0xff TO TEMP1 WITH CARRY
at 0x000000fb : */ 0x7f1dff00,0x00000000,
/*
MOVE TEMP2 + 0xff TO TEMP2 WITH CARRY
at 0x000000fd : */ 0x7f1eff00,0x00000000,
/*
MOVE TEMP3 + 0xff TO TEMP3 WITH CARRY
at 0x000000ff : */ 0x7f1fff00,0x00000000,
/*
ENTRY msg_in
msg_in:
MOVE 1, msg_buf, WHEN MSG_IN
at 0x00000101 : */ 0x0f000001,0x00000000,
/*
munge_msg:
JUMP munge_extended, IF 0x01 ; EXTENDED MESSAGE
at 0x00000103 : */ 0x800c0001,0x00000524,
/*
JUMP munge_2, IF 0x20, AND MASK 0xdf ; two byte message
at 0x00000105 : */ 0x800cdf20,0x0000044c,
/*
;
; XXX - I've seen a handful of broken SCSI devices which fail to issue
; a SAVE POINTERS message before disconnecting in the middle of
; a transfer, assuming that the DATA POINTER will be implicitly
; restored.
;
; Historically, I've often done an implicit save when the DISCONNECT
; message is processed. We may want to consider having the option of
; doing that here.
;
JUMP munge_save_data_pointer, IF 0x02 ; SAVE DATA POINTER
at 0x00000107 : */ 0x800c0002,0x00000454,
/*
JUMP munge_restore_pointers, IF 0x03 ; RESTORE POINTERS
at 0x00000109 : */ 0x800c0003,0x000004b8,
/*
JUMP munge_disconnect, IF 0x04 ; DISCONNECT
at 0x0000010b : */ 0x800c0004,0x0000051c,
/*
INT int_msg_1, IF 0x07 ; MESSAGE REJECT
at 0x0000010d : */ 0x980c0007,0x01020000,
/*
INT int_msg_1, IF 0x0f ; INITIATE RECOVERY
at 0x0000010f : */ 0x980c000f,0x01020000,
/*
JUMP reject_message
at 0x00000111 : */ 0x80080000,0x000005b4,
/*
munge_2:
JUMP reject_message
at 0x00000113 : */ 0x80080000,0x000005b4,
/*
;
; The SCSI standard allows targets to recover from transient
; error conditions by backing up the data pointer with a
; RESTORE POINTERS message.
;
; So, we must save and restore the _residual_ code as well as
; the current instruction pointer. Because of this messiness,
; it is simpler to put dynamic code in the dsa for this and to
; just do a simple jump down there.
;
munge_save_data_pointer:
MOVE DSA0 + dsa_save_data_pointer TO SFBR
at 0x00000115 : */ 0x76100000,0x00000000,
/*
MOVE SFBR TO SCRATCH0
at 0x00000117 : */ 0x6a340000,0x00000000,
/*
MOVE DSA1 + 0xff TO SFBR WITH CARRY
at 0x00000119 : */ 0x7711ff00,0x00000000,
/*
MOVE SFBR TO SCRATCH1
at 0x0000011b : */ 0x6a350000,0x00000000,
/*
MOVE DSA2 + 0xff TO SFBR WITH CARRY
at 0x0000011d : */ 0x7712ff00,0x00000000,
/*
MOVE SFBR TO SCRATCH2
at 0x0000011f : */ 0x6a360000,0x00000000,
/*
MOVE DSA3 + 0xff TO SFBR WITH CARRY
at 0x00000121 : */ 0x7713ff00,0x00000000,
/*
MOVE SFBR TO SCRATCH3
at 0x00000123 : */ 0x6a370000,0x00000000,
/*
MOVE dmode_ncr_to_memory TO DMODE
at 0x00000125 : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, addr_scratch, jump_dsa_save + 4
at 0x00000127 : */ 0xc0000004,0x00000000,0x000004b4,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x0000012a : */ 0x78380000,0x00000000,
/*
jump_dsa_save:
JUMP 0
at 0x0000012c : */ 0x80080000,0x00000000,
/*
munge_restore_pointers:
MOVE DSA0 + dsa_restore_pointers TO SFBR
at 0x0000012e : */ 0x76100000,0x00000000,
/*
MOVE SFBR TO SCRATCH0
at 0x00000130 : */ 0x6a340000,0x00000000,
/*
MOVE DSA1 + 0xff TO SFBR WITH CARRY
at 0x00000132 : */ 0x7711ff00,0x00000000,
/*
MOVE SFBR TO SCRATCH1
at 0x00000134 : */ 0x6a350000,0x00000000,
/*
MOVE DSA2 + 0xff TO SFBR WITH CARRY
at 0x00000136 : */ 0x7712ff00,0x00000000,
/*
MOVE SFBR TO SCRATCH2
at 0x00000138 : */ 0x6a360000,0x00000000,
/*
MOVE DSA3 + 0xff TO SFBR WITH CARRY
at 0x0000013a : */ 0x7713ff00,0x00000000,
/*
MOVE SFBR TO SCRATCH3
at 0x0000013c : */ 0x6a370000,0x00000000,
/*
MOVE dmode_ncr_to_memory TO DMODE
at 0x0000013e : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, addr_scratch, jump_dsa_restore + 4
at 0x00000140 : */ 0xc0000004,0x00000000,0x00000518,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x00000143 : */ 0x78380000,0x00000000,
/*
jump_dsa_restore:
JUMP 0
at 0x00000145 : */ 0x80080000,0x00000000,
/*
munge_disconnect:
JUMP dsa_schedule
at 0x00000147 : */ 0x80080000,0x00000168,
/*
munge_extended:
CLEAR ACK
at 0x00000149 : */ 0x60000040,0x00000000,
/*
INT int_err_unexpected_phase, WHEN NOT MSG_IN
at 0x0000014b : */ 0x9f030000,0x00000000,
/*
MOVE 1, msg_buf + 1, WHEN MSG_IN
at 0x0000014d : */ 0x0f000001,0x00000001,
/*
JUMP munge_extended_2, IF 0x02
at 0x0000014f : */ 0x800c0002,0x00000554,
/*
JUMP munge_extended_3, IF 0x03
at 0x00000151 : */ 0x800c0003,0x00000584,
/*
JUMP reject_message
at 0x00000153 : */ 0x80080000,0x000005b4,
/*
munge_extended_2:
CLEAR ACK
at 0x00000155 : */ 0x60000040,0x00000000,
/*
MOVE 1, msg_buf + 2, WHEN MSG_IN
at 0x00000157 : */ 0x0f000001,0x00000002,
/*
JUMP reject_message, IF NOT 0x02 ; Must be WDTR
at 0x00000159 : */ 0x80040002,0x000005b4,
/*
CLEAR ACK
at 0x0000015b : */ 0x60000040,0x00000000,
/*
MOVE 1, msg_buf + 3, WHEN MSG_IN
at 0x0000015d : */ 0x0f000001,0x00000003,
/*
INT int_msg_wdtr
at 0x0000015f : */ 0x98080000,0x01000000,
/*
munge_extended_3:
CLEAR ACK
at 0x00000161 : */ 0x60000040,0x00000000,
/*
MOVE 1, msg_buf + 2, WHEN MSG_IN
at 0x00000163 : */ 0x0f000001,0x00000002,
/*
JUMP reject_message, IF NOT 0x01 ; Must be SDTR
at 0x00000165 : */ 0x80040001,0x000005b4,
/*
CLEAR ACK
at 0x00000167 : */ 0x60000040,0x00000000,
/*
MOVE 2, msg_buf + 3, WHEN MSG_IN
at 0x00000169 : */ 0x0f000002,0x00000003,
/*
INT int_msg_sdtr
at 0x0000016b : */ 0x98080000,0x01010000,
/*
ENTRY reject_message
reject_message:
SET ATN
at 0x0000016d : */ 0x58000008,0x00000000,
/*
CLEAR ACK
at 0x0000016f : */ 0x60000040,0x00000000,
/*
MOVE 1, NCR53c7xx_msg_reject, WHEN MSG_OUT
at 0x00000171 : */ 0x0e000001,0x00000000,
/*
RETURN
at 0x00000173 : */ 0x90080000,0x00000000,
/*
ENTRY accept_message
accept_message:
CLEAR ATN
at 0x00000175 : */ 0x60000008,0x00000000,
/*
CLEAR ACK
at 0x00000177 : */ 0x60000040,0x00000000,
/*
RETURN
at 0x00000179 : */ 0x90080000,0x00000000,
/*
ENTRY respond_message
respond_message:
SET ATN
at 0x0000017b : */ 0x58000008,0x00000000,
/*
CLEAR ACK
at 0x0000017d : */ 0x60000040,0x00000000,
/*
MOVE FROM dsa_msgout_other, WHEN MSG_OUT
at 0x0000017f : */ 0x1e000000,0x00000068,
/*
RETURN
at 0x00000181 : */ 0x90080000,0x00000000,
/*
;
; command_complete
;
; PURPOSE : handle command termination when STATUS IN is detected by reading
; a status byte followed by a command termination message.
;
; Normal termination results in an INTFLY instruction, and
; the host system can pick out which command terminated by
; examining the MESSAGE and STATUS buffers of all currently
; executing commands;
;
; Abnormal (CHECK_CONDITION) termination results in an
; int_err_check_condition interrupt so that a REQUEST SENSE
; command can be issued out-of-order so that no other command
; clears the contingent allegiance condition.
;
;
; INPUTS : DSA - command
;
; CALLS : OK
;
; EXITS : On successful termination, control is passed to schedule.
; On abnormal termination, the user will usually modify the
; DSA fields and corresponding buffers and return control
; to select.
;
ENTRY command_complete
command_complete:
MOVE FROM dsa_status, WHEN STATUS
at 0x00000183 : */ 0x1b000000,0x00000060,
/*
MOVE SFBR TO SCRATCH0 ; Save status
at 0x00000185 : */ 0x6a340000,0x00000000,
/*
ENTRY command_complete_msgin
command_complete_msgin:
MOVE FROM dsa_msgin, WHEN MSG_IN
at 0x00000187 : */ 0x1f000000,0x00000058,
/*
; Indicate that we should be expecting a disconnect
MOVE SCNTL2 & 0x7f TO SCNTL2
at 0x00000189 : */ 0x7c027f00,0x00000000,
/*
CLEAR ACK
at 0x0000018b : */ 0x60000040,0x00000000,
/*
WAIT DISCONNECT
at 0x0000018d : */ 0x48000000,0x00000000,
/*
;
; The SCSI specification states that when a UNIT ATTENTION condition
; is pending, as indicated by a CHECK CONDITION status message,
; the target shall revert to asynchronous transfers. Since
; synchronous transfers parameters are maintained on a per INITIATOR/TARGET
; basis, and returning control to our scheduler could work on a command
; running on another lun on that target using the old parameters, we must
; interrupt the host processor to get them changed, or change them ourselves.
;
; Once SCSI-II tagged queueing is implemented, things will be even more
; hairy, since contingent allegiance conditions exist on a per-target/lun
; basis, and issuing a new command with a different tag would clear it.
; In these cases, we must interrupt the host processor to get a request
; added to the HEAD of the queue with the request sense command, or we
; must automatically issue the request sense command.
INTFLY
at 0x0000018f : */ 0x98180000,0x00000000,
/*
JUMP schedule
at 0x00000191 : */ 0x80080000,0x00000000,
/*
command_failed:
INT int_err_check_condition
at 0x00000193 : */ 0x98080000,0x00030000,
/*
;
; wait_reselect
;
; PURPOSE : This is essentially the idle routine, where control lands
; when there are no new processes to schedule. wait_reselect
; waits for reselection, selection, and new commands.
;
; When a successful reselection occurs, with the aid
; of fixed up code in each DSA, wait_reselect walks the
; reconnect_dsa_queue, asking each dsa if the target ID
; and LUN match its.
;
; If a match is found, a call is made back to reselected_ok,
; which through the miracles of self modifying code, extracts
; the found DSA from the reconnect_dsa_queue and then
; returns control to the DSAs thread of execution.
;
; INPUTS : NONE
;
; CALLS : OK
;
; MODIFIES : DSA,
;
; EXITS : On successful reselection, control is returned to the
; DSA which called reselected_ok. If the WAIT RESELECT
; was interrupted by a new commands arrival signaled by
; SIG_P, control is passed to schedule. If the NCR is
; selected, the host system is interrupted with an
; int_err_selected which is usually responded to by
; setting DSP to the target_abort address.
ENTRY wait_reselect
wait_reselect:
WAIT RESELECT wait_reselect_failed
at 0x00000195 : */ 0x50000000,0x0000076c,
/*
reselected:
CLEAR TARGET
at 0x00000197 : */ 0x60000200,0x00000000,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x00000199 : */ 0x78380000,0x00000000,
/*
; Read all data needed to reestablish the nexus -
MOVE 1, reselected_identify, WHEN MSG_IN
at 0x0000019b : */ 0x0f000001,0x00000000,
/*
; We used to CLEAR ACK here.
; Point DSA at the current head of the disconnected queue.
MOVE dmode_memory_to_ncr TO DMODE
at 0x0000019d : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, reconnect_dsa_head, addr_scratch
at 0x0000019f : */ 0xc0000004,0x00000000,0x00000000,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x000001a2 : */ 0x78380000,0x00000000,
/*
CALL scratch_to_dsa
at 0x000001a4 : */ 0x88080000,0x00000980,
/*
; Fix the update-next pointer so that the reconnect_dsa_head
; pointer is the one that will be updated if this DSA is a hit
; and we remove it from the queue.
MOVE MEMORY 4, addr_reconnect_dsa_head, reselected_ok + 8
at 0x000001a6 : */ 0xc0000004,0x00000000,0x00000758,
/*
ENTRY reselected_check_next
reselected_check_next:
; Check for a NULL pointer.
MOVE DSA0 TO SFBR
at 0x000001a9 : */ 0x72100000,0x00000000,
/*
JUMP reselected_not_end, IF NOT 0
at 0x000001ab : */ 0x80040000,0x000006ec,
/*
MOVE DSA1 TO SFBR
at 0x000001ad : */ 0x72110000,0x00000000,
/*
JUMP reselected_not_end, IF NOT 0
at 0x000001af : */ 0x80040000,0x000006ec,
/*
MOVE DSA2 TO SFBR
at 0x000001b1 : */ 0x72120000,0x00000000,
/*
JUMP reselected_not_end, IF NOT 0
at 0x000001b3 : */ 0x80040000,0x000006ec,
/*
MOVE DSA3 TO SFBR
at 0x000001b5 : */ 0x72130000,0x00000000,
/*
JUMP reselected_not_end, IF NOT 0
at 0x000001b7 : */ 0x80040000,0x000006ec,
/*
INT int_err_unexpected_reselect
at 0x000001b9 : */ 0x98080000,0x00020000,
/*
reselected_not_end:
;
; XXX the ALU is only eight bits wide, and the assembler
; wont do the dirt work for us. As long as dsa_check_reselect
; is negative, we need to sign extend with 1 bits to the full
; 32 bit width of the address.
;
; A potential work around would be to have a known alignment
; of the DSA structure such that the base address plus
; dsa_check_reselect doesn't require carrying from bytes
; higher than the LSB.
;
MOVE DSA0 TO SFBR
at 0x000001bb : */ 0x72100000,0x00000000,
/*
MOVE SFBR + dsa_check_reselect TO SCRATCH0
at 0x000001bd : */ 0x6e340000,0x00000000,
/*
MOVE DSA1 TO SFBR
at 0x000001bf : */ 0x72110000,0x00000000,
/*
MOVE SFBR + 0xff TO SCRATCH1 WITH CARRY
at 0x000001c1 : */ 0x6f35ff00,0x00000000,
/*
MOVE DSA2 TO SFBR
at 0x000001c3 : */ 0x72120000,0x00000000,
/*
MOVE SFBR + 0xff TO SCRATCH2 WITH CARRY
at 0x000001c5 : */ 0x6f36ff00,0x00000000,
/*
MOVE DSA3 TO SFBR
at 0x000001c7 : */ 0x72130000,0x00000000,
/*
MOVE SFBR + 0xff TO SCRATCH3 WITH CARRY
at 0x000001c9 : */ 0x6f37ff00,0x00000000,
/*
MOVE dmode_ncr_to_memory TO DMODE
at 0x000001cb : */ 0x78380000,0x00000000,
/*
MOVE MEMORY 4, addr_scratch, reselected_check + 4
at 0x000001cd : */ 0xc0000004,0x00000000,0x0000074c,
/*
MOVE dmode_memory_to_memory TO DMODE
at 0x000001d0 : */ 0x78380000,0x00000000,
/*
reselected_check:
JUMP 0
at 0x000001d2 : */ 0x80080000,0x00000000,
/*
;
;
ENTRY reselected_ok
reselected_ok:
MOVE MEMORY 4, 0, 0 ; Patched : first word
at 0x000001d4 : */ 0xc0000004,0x00000000,0x00000000,
/*
; is address of
; successful dsa_next
; Second word is last
; unsuccessful dsa_next,
; starting with
; dsa_reconnect_head
; We used to CLEAR ACK here.
RETURN ; Return control to where
at 0x000001d7 : */ 0x90080000,0x00000000,
/*
selected:
INT int_err_selected;
at 0x000001d9 : */ 0x98080000,0x00010000,
/*
;
; A select or reselect failure can be caused by one of two conditions :
; 1. SIG_P was set. This will be the case if the user has written
; a new value to a previously NULL head of the issue queue.
;
; 2. The NCR53c810 was selected or reselected by another device.
;
; 3. The bus was already busy since we were selected or reselected
; before starting the command.
wait_reselect_failed:
; Check selected bit.
MOVE SIST0 & 0x20 TO SFBR
at 0x000001db : */ 0x74422000,0x00000000,
/*
JUMP selected, IF 0x20
at 0x000001dd : */ 0x800c0020,0x00000764,
/*
; Reading CTEST2 clears the SIG_P bit in the ISTAT register.
MOVE CTEST2 & 0x40 TO SFBR
at 0x000001df : */ 0x741a4000,0x00000000,
/*
JUMP schedule, IF 0x40
at 0x000001e1 : */ 0x800c0040,0x00000000,
/*
; Check connected bit.
; FIXME: this needs to change if we support target mode
MOVE ISTAT & 0x08 TO SFBR
at 0x000001e3 : */ 0x74140800,0x00000000,
/*
JUMP reselected, IF 0x08
at 0x000001e5 : */ 0x800c0008,0x0000065c,
/*
; FIXME : Something bogus happened, and we shouldn't fail silently.
INT int_debug_panic
at 0x000001e7 : */ 0x98080000,0x030b0000,
/*
select_failed:
; Otherwise, mask the selected and reselected bits off SIST0
MOVE SIST0 & 0x30 TO SFBR
at 0x000001e9 : */ 0x74423000,0x00000000,
/*
JUMP selected, IF 0x20
at 0x000001eb : */ 0x800c0020,0x00000764,
/*
JUMP reselected, IF 0x10
at 0x000001ed : */ 0x800c0010,0x0000065c,
/*
; If SIGP is set, the user just gave us another command, and
; we should restart or return to the scheduler.
; Reading CTEST2 clears the SIG_P bit in the ISTAT register.
MOVE CTEST2 & 0x40 TO SFBR
at 0x000001ef : */ 0x741a4000,0x00000000,
/*
JUMP select, IF 0x40
at 0x000001f1 : */ 0x800c0040,0x000001fc,
/*
; Check connected bit.
; FIXME: this needs to change if we support target mode
; FIXME: is this really necessary?
MOVE ISTAT & 0x08 TO SFBR
at 0x000001f3 : */ 0x74140800,0x00000000,
/*
JUMP reselected, IF 0x08
at 0x000001f5 : */ 0x800c0008,0x0000065c,
/*
; FIXME : Something bogus happened, and we shouldn't fail silently.
INT int_debug_panic
at 0x000001f7 : */ 0x98080000,0x030b0000,
/*
;
; test_1
; test_2
;
; PURPOSE : run some verification tests on the NCR. test_1
; copies test_src to test_dest and interrupts the host
; processor, testing for cache coherency and interrupt
; problems in the processes.
;
; test_2 runs a command with offsets relative to the
; DSA on entry, and is useful for miscellaneous experimentation.
;
; Verify that interrupts are working correctly and that we don't
; have a cache invalidation problem.
ABSOLUTE test_src = 0, test_dest = 0
ENTRY test_1
test_1:
MOVE MEMORY 4, test_src, test_dest
at 0x000001f9 : */ 0xc0000004,0x00000000,0x00000000,
/*
INT int_test_1
at 0x000001fc : */ 0x98080000,0x04000000,
/*
;
; Run arbitrary commands, with test code establishing a DSA
;
ENTRY test_2
test_2:
CLEAR TARGET
at 0x000001fe : */ 0x60000200,0x00000000,
/*
SELECT ATN FROM 0, test_2_fail
at 0x00000200 : */ 0x43000000,0x00000850,
/*
JUMP test_2_msgout, WHEN MSG_OUT
at 0x00000202 : */ 0x860b0000,0x00000810,
/*
ENTRY test_2_msgout
test_2_msgout:
MOVE FROM 8, WHEN MSG_OUT
at 0x00000204 : */ 0x1e000000,0x00000008,
/*
MOVE FROM 16, WHEN CMD
at 0x00000206 : */ 0x1a000000,0x00000010,
/*
MOVE FROM 24, WHEN DATA_IN
at 0x00000208 : */ 0x19000000,0x00000018,
/*
MOVE FROM 32, WHEN STATUS
at 0x0000020a : */ 0x1b000000,0x00000020,
/*
MOVE FROM 40, WHEN MSG_IN
at 0x0000020c : */ 0x1f000000,0x00000028,
/*
MOVE SCNTL2 & 0x7f TO SCNTL2
at 0x0000020e : */ 0x7c027f00,0x00000000,
/*
CLEAR ACK
at 0x00000210 : */ 0x60000040,0x00000000,
/*
WAIT DISCONNECT
at 0x00000212 : */ 0x48000000,0x00000000,
/*
test_2_fail:
INT int_test_2
at 0x00000214 : */ 0x98080000,0x04010000,
/*
ENTRY debug_break
debug_break:
INT int_debug_break
at 0x00000216 : */ 0x98080000,0x03000000,
/*
;
; initiator_abort
; target_abort
;
; PURPOSE : Abort the currently established nexus from with initiator
; or target mode.
;
;
ENTRY target_abort
target_abort:
SET TARGET
at 0x00000218 : */ 0x58000200,0x00000000,
/*
DISCONNECT
at 0x0000021a : */ 0x48000000,0x00000000,
/*
CLEAR TARGET
at 0x0000021c : */ 0x60000200,0x00000000,
/*
JUMP schedule
at 0x0000021e : */ 0x80080000,0x00000000,
/*
ENTRY initiator_abort
initiator_abort:
SET ATN
at 0x00000220 : */ 0x58000008,0x00000000,
/*
;
; The SCSI-I specification says that targets may go into MSG out at
; their leisure upon receipt of the ATN single. On all versions of the
; specification, we can't change phases until REQ transitions true->false,
; so we need to sink/source one byte of data to allow the transition.
;
; For the sake of safety, we'll only source one byte of data in all
; cases, but to accommodate the SCSI-I dain bramage, we'll sink an
; arbitrary number of bytes.
JUMP spew_cmd, WHEN CMD
at 0x00000222 : */ 0x820b0000,0x000008b8,
/*
JUMP eat_msgin, WHEN MSG_IN
at 0x00000224 : */ 0x870b0000,0x000008c8,
/*
JUMP eat_datain, WHEN DATA_IN
at 0x00000226 : */ 0x810b0000,0x000008f8,
/*
JUMP eat_status, WHEN STATUS
at 0x00000228 : */ 0x830b0000,0x000008e0,
/*
JUMP spew_dataout, WHEN DATA_OUT
at 0x0000022a : */ 0x800b0000,0x00000910,
/*
JUMP sated
at 0x0000022c : */ 0x80080000,0x00000918,
/*
spew_cmd:
MOVE 1, NCR53c7xx_zero, WHEN CMD
at 0x0000022e : */ 0x0a000001,0x00000000,
/*
JUMP sated
at 0x00000230 : */ 0x80080000,0x00000918,
/*
eat_msgin:
MOVE 1, NCR53c7xx_sink, WHEN MSG_IN
at 0x00000232 : */ 0x0f000001,0x00000000,
/*
JUMP eat_msgin, WHEN MSG_IN
at 0x00000234 : */ 0x870b0000,0x000008c8,
/*
JUMP sated
at 0x00000236 : */ 0x80080000,0x00000918,
/*
eat_status:
MOVE 1, NCR53c7xx_sink, WHEN STATUS
at 0x00000238 : */ 0x0b000001,0x00000000,
/*
JUMP eat_status, WHEN STATUS
at 0x0000023a : */ 0x830b0000,0x000008e0,
/*
JUMP sated
at 0x0000023c : */ 0x80080000,0x00000918,
/*
eat_datain:
MOVE 1, NCR53c7xx_sink, WHEN DATA_IN
at 0x0000023e : */ 0x09000001,0x00000000,
/*
JUMP eat_datain, WHEN DATA_IN
at 0x00000240 : */ 0x810b0000,0x000008f8,
/*
JUMP sated
at 0x00000242 : */ 0x80080000,0x00000918,
/*
spew_dataout:
MOVE 1, NCR53c7xx_zero, WHEN DATA_OUT
at 0x00000244 : */ 0x08000001,0x00000000,
/*
sated:
MOVE SCNTL2 & 0x7f TO SCNTL2
at 0x00000246 : */ 0x7c027f00,0x00000000,
/*
MOVE 1, NCR53c7xx_msg_abort, WHEN MSG_OUT
at 0x00000248 : */ 0x0e000001,0x00000000,
/*
WAIT DISCONNECT
at 0x0000024a : */ 0x48000000,0x00000000,
/*
INT int_norm_aborted
at 0x0000024c : */ 0x98080000,0x02040000,
/*
;
; dsa_to_scratch
; scratch_to_dsa
;
; PURPOSE :
; The NCR chips cannot do a move memory instruction with the DSA register
; as the source or destination. So, we provide a couple of subroutines
; that let us switch between the DSA register and scratch register.
;
; Memory moves to/from the DSPS register also don't work, but we
; don't use them.
;
;
dsa_to_scratch:
MOVE DSA0 TO SFBR
at 0x0000024e : */ 0x72100000,0x00000000,
/*
MOVE SFBR TO SCRATCH0
at 0x00000250 : */ 0x6a340000,0x00000000,
/*
MOVE DSA1 TO SFBR
at 0x00000252 : */ 0x72110000,0x00000000,
/*
MOVE SFBR TO SCRATCH1
at 0x00000254 : */ 0x6a350000,0x00000000,
/*
MOVE DSA2 TO SFBR
at 0x00000256 : */ 0x72120000,0x00000000,
/*
MOVE SFBR TO SCRATCH2
at 0x00000258 : */ 0x6a360000,0x00000000,
/*
MOVE DSA3 TO SFBR
at 0x0000025a : */ 0x72130000,0x00000000,
/*
MOVE SFBR TO SCRATCH3
at 0x0000025c : */ 0x6a370000,0x00000000,
/*
RETURN
at 0x0000025e : */ 0x90080000,0x00000000,
/*
scratch_to_dsa:
MOVE SCRATCH0 TO SFBR
at 0x00000260 : */ 0x72340000,0x00000000,
/*
MOVE SFBR TO DSA0
at 0x00000262 : */ 0x6a100000,0x00000000,
/*
MOVE SCRATCH1 TO SFBR
at 0x00000264 : */ 0x72350000,0x00000000,
/*
MOVE SFBR TO DSA1
at 0x00000266 : */ 0x6a110000,0x00000000,
/*
MOVE SCRATCH2 TO SFBR
at 0x00000268 : */ 0x72360000,0x00000000,
/*
MOVE SFBR TO DSA2
at 0x0000026a : */ 0x6a120000,0x00000000,
/*
MOVE SCRATCH3 TO SFBR
at 0x0000026c : */ 0x72370000,0x00000000,
/*
MOVE SFBR TO DSA3
at 0x0000026e : */ 0x6a130000,0x00000000,
/*
RETURN
at 0x00000270 : */ 0x90080000,0x00000000,
};
#define A_NCR53c7xx_msg_abort 0x00000000
u32 A_NCR53c7xx_msg_abort_used[] = {
0x00000249,
};
#define A_NCR53c7xx_msg_reject 0x00000000
u32 A_NCR53c7xx_msg_reject_used[] = {
0x00000172,
};
#define A_NCR53c7xx_sink 0x00000000
u32 A_NCR53c7xx_sink_used[] = {
0x00000233,
0x00000239,
0x0000023f,
};
#define A_NCR53c7xx_zero 0x00000000
u32 A_NCR53c7xx_zero_used[] = {
0x0000022f,
0x00000245,
};
#define A_NOP_insn 0x00000000
u32 A_NOP_insn_used[] = {
0x00000010,
};
#define A_addr_reconnect_dsa_head 0x00000000
u32 A_addr_reconnect_dsa_head_used[] = {
0x000001a7,
};
#define A_addr_scratch 0x00000000
u32 A_addr_scratch_used[] = {
0x00000004,
0x0000001b,
0x00000046,
0x00000067,
0x00000073,
0x000000b0,
0x000000c6,
0x00000128,
0x00000141,
0x000001a1,
0x000001ce,
};
#define A_addr_temp 0x00000000
u32 A_addr_temp_used[] = {
0x00000025,
0x00000034,
};
#define A_dmode_memory_to_memory 0x00000000
u32 A_dmode_memory_to_memory_used[] = {
0x00000005,
0x0000001c,
0x00000027,
0x00000035,
0x00000047,
0x00000069,
0x00000075,
0x000000b2,
0x000000c8,
0x0000012a,
0x00000143,
0x00000199,
0x000001a2,
0x000001d0,
};
#define A_dmode_memory_to_ncr 0x00000000
u32 A_dmode_memory_to_ncr_used[] = {
0x00000000,
0x00000017,
0x00000030,
0x00000042,
0x0000019d,
};
#define A_dmode_ncr_to_memory 0x00000000
u32 A_dmode_ncr_to_memory_used[] = {
0x00000022,
0x00000064,
0x00000070,
0x000000ad,
0x000000c3,
0x00000125,
0x0000013e,
0x000001cb,
};
#define A_dsa_check_reselect 0x00000000
u32 A_dsa_check_reselect_used[] = {
0x000001bd,
};
#define A_dsa_cmdout 0x00000048
u32 A_dsa_cmdout_used[] = {
0x00000094,
};
#define A_dsa_cmnd 0x00000038
u32 A_dsa_cmnd_used[] = {
};
#define A_dsa_datain 0x00000054
u32 A_dsa_datain_used[] = {
0x000000bb,
};
#define A_dsa_dataout 0x00000050
u32 A_dsa_dataout_used[] = {
0x000000a5,
};
#define A_dsa_end 0x00000070
u32 A_dsa_end_used[] = {
};
#define A_dsa_fields_start 0x00000000
u32 A_dsa_fields_start_used[] = {
};
#define A_dsa_msgin 0x00000058
u32 A_dsa_msgin_used[] = {
0x00000188,
};
#define A_dsa_msgout 0x00000040
u32 A_dsa_msgout_used[] = {
0x00000086,
};
#define A_dsa_msgout_other 0x00000068
u32 A_dsa_msgout_other_used[] = {
0x00000180,
};
#define A_dsa_next 0x00000030
u32 A_dsa_next_used[] = {
0x0000005c,
};
#define A_dsa_restore_pointers 0x00000000
u32 A_dsa_restore_pointers_used[] = {
0x0000012e,
};
#define A_dsa_save_data_pointer 0x00000000
u32 A_dsa_save_data_pointer_used[] = {
0x00000115,
};
#define A_dsa_select 0x0000003c
u32 A_dsa_select_used[] = {
0x00000081,
};
#define A_dsa_status 0x00000060
u32 A_dsa_status_used[] = {
0x00000184,
};
#define A_dsa_temp_addr_array_value 0x00000000
u32 A_dsa_temp_addr_array_value_used[] = {
};
#define A_dsa_temp_addr_dsa_value 0x00000000
u32 A_dsa_temp_addr_dsa_value_used[] = {
0x00000003,
};
#define A_dsa_temp_addr_new_value 0x00000000
u32 A_dsa_temp_addr_new_value_used[] = {
};
#define A_dsa_temp_addr_next 0x00000000
u32 A_dsa_temp_addr_next_used[] = {
0x00000015,
0x0000004e,
};
#define A_dsa_temp_addr_residual 0x00000000
u32 A_dsa_temp_addr_residual_used[] = {
0x0000002a,
0x00000039,
};
#define A_dsa_temp_addr_saved_pointer 0x00000000
u32 A_dsa_temp_addr_saved_pointer_used[] = {
0x00000026,
0x00000033,
};
#define A_dsa_temp_addr_saved_residual 0x00000000
u32 A_dsa_temp_addr_saved_residual_used[] = {
0x0000002b,
0x00000038,
};
#define A_dsa_temp_lun 0x00000000
u32 A_dsa_temp_lun_used[] = {
0x0000004b,
};
#define A_dsa_temp_next 0x00000000
u32 A_dsa_temp_next_used[] = {
0x0000001a,
};
#define A_dsa_temp_sync 0x00000000
u32 A_dsa_temp_sync_used[] = {
0x00000053,
};
#define A_dsa_temp_target 0x00000000
u32 A_dsa_temp_target_used[] = {
0x00000040,
};
#define A_int_debug_break 0x03000000
u32 A_int_debug_break_used[] = {
0x00000217,
};
#define A_int_debug_panic 0x030b0000
u32 A_int_debug_panic_used[] = {
0x000001e8,
0x000001f8,
};
#define A_int_err_check_condition 0x00030000
u32 A_int_err_check_condition_used[] = {
0x00000194,
};
#define A_int_err_no_phase 0x00040000
u32 A_int_err_no_phase_used[] = {
};
#define A_int_err_selected 0x00010000
u32 A_int_err_selected_used[] = {
0x000001da,
};
#define A_int_err_unexpected_phase 0x00000000
u32 A_int_err_unexpected_phase_used[] = {
0x0000008c,
0x00000092,
0x0000009a,
0x000000d0,
0x000000d4,
0x000000d6,
0x000000de,
0x000000e2,
0x000000e4,
0x000000ec,
0x000000f0,
0x000000f2,
0x000000f4,
0x0000014c,
};
#define A_int_err_unexpected_reselect 0x00020000
u32 A_int_err_unexpected_reselect_used[] = {
0x000001ba,
};
#define A_int_msg_1 0x01020000
u32 A_int_msg_1_used[] = {
0x0000010e,
0x00000110,
};
#define A_int_msg_sdtr 0x01010000
u32 A_int_msg_sdtr_used[] = {
0x0000016c,
};
#define A_int_msg_wdtr 0x01000000
u32 A_int_msg_wdtr_used[] = {
0x00000160,
};
#define A_int_norm_aborted 0x02040000
u32 A_int_norm_aborted_used[] = {
0x0000024d,
};
#define A_int_norm_command_complete 0x02020000
u32 A_int_norm_command_complete_used[] = {
};
#define A_int_norm_disconnected 0x02030000
u32 A_int_norm_disconnected_used[] = {
};
#define A_int_norm_reselect_complete 0x02010000
u32 A_int_norm_reselect_complete_used[] = {
};
#define A_int_norm_reset 0x02050000
u32 A_int_norm_reset_used[] = {
};
#define A_int_norm_select_complete 0x02000000
u32 A_int_norm_select_complete_used[] = {
};
#define A_int_test_1 0x04000000
u32 A_int_test_1_used[] = {
0x000001fd,
};
#define A_int_test_2 0x04010000
u32 A_int_test_2_used[] = {
0x00000215,
};
#define A_int_test_3 0x04020000
u32 A_int_test_3_used[] = {
};
#define A_msg_buf 0x00000000
u32 A_msg_buf_used[] = {
0x00000102,
0x0000014e,
0x00000158,
0x0000015e,
0x00000164,
0x0000016a,
};
#define A_reconnect_dsa_head 0x00000000
u32 A_reconnect_dsa_head_used[] = {
0x0000006c,
0x00000074,
0x000001a0,
};
#define A_reselected_identify 0x00000000
u32 A_reselected_identify_used[] = {
0x00000045,
0x0000019c,
};
#define A_reselected_tag 0x00000000
u32 A_reselected_tag_used[] = {
};
#define A_schedule 0x00000000
u32 A_schedule_used[] = {
0x0000007e,
0x00000192,
0x000001e2,
0x0000021f,
};
#define A_test_dest 0x00000000
u32 A_test_dest_used[] = {
0x000001fb,
};
#define A_test_src 0x00000000
u32 A_test_src_used[] = {
0x000001fa,
};
#define Ent_accept_message 0x000005d4
#define Ent_cmdout_cmdout 0x0000024c
#define Ent_command_complete 0x0000060c
#define Ent_command_complete_msgin 0x0000061c
#define Ent_data_transfer 0x00000254
#define Ent_datain_to_jump 0x00000328
#define Ent_debug_break 0x00000858
#define Ent_dsa_code_begin 0x00000000
#define Ent_dsa_code_check_reselect 0x000000f8
#define Ent_dsa_code_fix_jump 0x0000003c
#define Ent_dsa_code_restore_pointers 0x000000c0
#define Ent_dsa_code_save_data_pointer 0x00000088
#define Ent_dsa_code_template 0x00000000
#define Ent_dsa_code_template_end 0x00000168
#define Ent_dsa_schedule 0x00000168
#define Ent_dsa_zero 0x00000168
#define Ent_end_data_transfer 0x0000028c
#define Ent_initiator_abort 0x00000880
#define Ent_msg_in 0x00000404
#define Ent_msg_in_restart 0x000003e4
#define Ent_other_in 0x00000374
#define Ent_other_out 0x0000033c
#define Ent_other_transfer 0x000003ac
#define Ent_reject_message 0x000005b4
#define Ent_reselected_check_next 0x000006a4
#define Ent_reselected_ok 0x00000750
#define Ent_respond_message 0x000005ec
#define Ent_select 0x000001fc
#define Ent_select_msgout 0x00000214
#define Ent_target_abort 0x00000860
#define Ent_test_1 0x000007e4
#define Ent_test_2 0x000007f8
#define Ent_test_2_msgout 0x00000810
#define Ent_wait_reselect 0x00000654
u32 LABELPATCHES[] = {
0x00000008,
0x0000000a,
0x00000013,
0x00000016,
0x0000001f,
0x00000021,
0x0000004f,
0x00000051,
0x0000005b,
0x00000068,
0x0000006f,
0x00000082,
0x00000084,
0x0000008a,
0x0000008e,
0x00000090,
0x00000096,
0x00000098,
0x0000009c,
0x0000009e,
0x000000a0,
0x000000a2,
0x000000a4,
0x000000b1,
0x000000b6,
0x000000ba,
0x000000c7,
0x000000cc,
0x000000d2,
0x000000d8,
0x000000da,
0x000000e0,
0x000000e6,
0x000000e8,
0x000000ee,
0x000000f6,
0x000000f8,
0x00000104,
0x00000106,
0x00000108,
0x0000010a,
0x0000010c,
0x00000112,
0x00000114,
0x00000129,
0x00000142,
0x00000148,
0x00000150,
0x00000152,
0x00000154,
0x0000015a,
0x00000166,
0x00000196,
0x000001a5,
0x000001a8,
0x000001ac,
0x000001b0,
0x000001b4,
0x000001b8,
0x000001cf,
0x000001de,
0x000001e6,
0x000001ec,
0x000001ee,
0x000001f2,
0x000001f6,
0x00000201,
0x00000203,
0x00000223,
0x00000225,
0x00000227,
0x00000229,
0x0000022b,
0x0000022d,
0x00000231,
0x00000235,
0x00000237,
0x0000023b,
0x0000023d,
0x00000241,
0x00000243,
};
struct {
u32 offset;
void *address;
} EXTERNAL_PATCHES[] = {
};
u32 INSTRUCTIONS = 301;
u32 PATCHES = 81;
u32 EXTERNAL_PATCHES_LEN = 0;
|