Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
   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
/*
 * arch/parisc/kernel/firmware.c  - safe PDC access routines
 *
 *	PDC == Processor Dependent Code
 *
 * See http://www.parisc-linux.org/documentation/index.html
 * for documentation describing the entry points and calling
 * conventions defined below.
 *
 * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
 * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
 * Copyright 2003 Grant Grundler <grundler parisc-linux org>
 * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org>
 * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org>
 *
 *    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.
 *
 */

/*	I think it would be in everyone's best interest to follow this
 *	guidelines when writing PDC wrappers:
 *
 *	 - the name of the pdc wrapper should match one of the macros
 *	   used for the first two arguments
 *	 - don't use caps for random parts of the name
 *	 - use the static PDC result buffers and "copyout" to structs
 *	   supplied by the caller to encapsulate alignment restrictions
 *	 - hold pdc_lock while in PDC or using static result buffers
 *	 - use __pa() to convert virtual (kernel) pointers to physical
 *	   ones.
 *	 - the name of the struct used for pdc return values should equal
 *	   one of the macros used for the first two arguments to the
 *	   corresponding PDC call
 *	 - keep the order of arguments
 *	 - don't be smart (setting trailing NUL bytes for strings, return
 *	   something useful even if the call failed) unless you are sure
 *	   it's not going to affect functionality or performance
 *
 *	Example:
 *	int pdc_cache_info(struct pdc_cache_info *cache_info )
 *	{
 *		int retval;
 *
 *		spin_lock_irq(&pdc_lock);
 *		retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
 *		convert_to_wide(pdc_result);
 *		memcpy(cache_info, pdc_result, sizeof(*cache_info));
 *		spin_unlock_irq(&pdc_lock);
 *
 *		return retval;
 *	}
 *					prumpf	991016	
 */

#include <stdarg.h>

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/spinlock.h>

#include <asm/page.h>
#include <asm/pdc.h>
#include <asm/pdcpat.h>
#include <asm/processor.h>	/* for boot_cpu_data */

#if defined(BOOTLOADER)
# undef  spin_lock_irqsave
# define spin_lock_irqsave(a, b) { b = 1; }
# undef  spin_unlock_irqrestore
# define spin_unlock_irqrestore(a, b)
#else
static DEFINE_SPINLOCK(pdc_lock);
#endif

extern unsigned long pdc_result[NUM_PDC_RESULT];
extern unsigned long pdc_result2[NUM_PDC_RESULT];

#ifdef CONFIG_64BIT
#define WIDE_FIRMWARE 0x1
#define NARROW_FIRMWARE 0x2

/* Firmware needs to be initially set to narrow to determine the 
 * actual firmware width. */
int parisc_narrow_firmware __read_mostly = 1;
#endif

/* On most currently-supported platforms, IODC I/O calls are 32-bit calls
 * and MEM_PDC calls are always the same width as the OS.
 * Some PAT boxes may have 64-bit IODC I/O.
 *
 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
 * This allowed wide kernels to run on Cxxx boxes.
 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
 * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
 */

#ifdef CONFIG_64BIT
long real64_call(unsigned long function, ...);
#endif
long real32_call(unsigned long function, ...);

#ifdef CONFIG_64BIT
#   define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
#   define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
#else
#   define MEM_PDC (unsigned long)PAGE0->mem_pdc
#   define mem_pdc_call(args...) real32_call(MEM_PDC, args)
#endif


/**
 * f_extend - Convert PDC addresses to kernel addresses.
 * @address: Address returned from PDC.
 *
 * This function is used to convert PDC addresses into kernel addresses
 * when the PDC address size and kernel address size are different.
 */
static unsigned long f_extend(unsigned long address)
{
#ifdef CONFIG_64BIT
	if(unlikely(parisc_narrow_firmware)) {
		if((address & 0xff000000) == 0xf0000000)
			return 0xf0f0f0f000000000UL | (u32)address;

		if((address & 0xf0000000) == 0xf0000000)
			return 0xffffffff00000000UL | (u32)address;
	}
#endif
	return address;
}

/**
 * convert_to_wide - Convert the return buffer addresses into kernel addresses.
 * @address: The return buffer from PDC.
 *
 * This function is used to convert the return buffer addresses retrieved from PDC
 * into kernel addresses when the PDC address size and kernel address size are
 * different.
 */
static void convert_to_wide(unsigned long *addr)
{
#ifdef CONFIG_64BIT
	int i;
	unsigned int *p = (unsigned int *)addr;

	if (unlikely(parisc_narrow_firmware)) {
		for (i = (NUM_PDC_RESULT-1); i >= 0; --i)
			addr[i] = p[i];
	}
#endif
}

#ifdef CONFIG_64BIT
void set_firmware_width_unlocked(void)
{
	int ret;

	ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
		__pa(pdc_result), 0);
	convert_to_wide(pdc_result);
	if (pdc_result[0] != NARROW_FIRMWARE)
		parisc_narrow_firmware = 0;
}
	
/**
 * set_firmware_width - Determine if the firmware is wide or narrow.
 * 
 * This function must be called before any pdc_* function that uses the
 * convert_to_wide function.
 */
void set_firmware_width(void)
{
	unsigned long flags;
	spin_lock_irqsave(&pdc_lock, flags);
	set_firmware_width_unlocked();
	spin_unlock_irqrestore(&pdc_lock, flags);
}
#else
void set_firmware_width_unlocked(void)
{
	return;
}

void set_firmware_width(void)
{
	return;
}
#endif /*CONFIG_64BIT*/


#if !defined(BOOTLOADER)
/**
 * pdc_emergency_unlock - Unlock the linux pdc lock
 *
 * This call unlocks the linux pdc lock in case we need some PDC functions
 * (like pdc_add_valid) during kernel stack dump.
 */
void pdc_emergency_unlock(void)
{
 	/* Spinlock DEBUG code freaks out if we unconditionally unlock */
        if (spin_is_locked(&pdc_lock))
		spin_unlock(&pdc_lock);
}


/**
 * pdc_add_valid - Verify address can be accessed without causing a HPMC.
 * @address: Address to be verified.
 *
 * This PDC call attempts to read from the specified address and verifies
 * if the address is valid.
 * 
 * The return value is PDC_OK (0) in case accessing this address is valid.
 */
int pdc_add_valid(unsigned long address)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}
EXPORT_SYMBOL(pdc_add_valid);

/**
 * pdc_instr - Get instruction that invokes PDCE_CHECK in HPMC handler.
 * @instr: Pointer to variable which will get instruction opcode.
 *
 * The return value is PDC_OK (0) in case call succeeded.
 */
int __init pdc_instr(unsigned int *instr)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_INSTR, 0UL, __pa(pdc_result));
	convert_to_wide(pdc_result);
	*instr = pdc_result[0];
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_chassis_info - Return chassis information.
 * @result: The return buffer.
 * @chassis_info: The memory buffer address.
 * @len: The size of the memory buffer address.
 *
 * An HVERSION dependent call for returning the chassis information.
 */
int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
        memcpy(&pdc_result2, led_info, len);
        retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
                              __pa(pdc_result), __pa(pdc_result2), len);
        memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
        memcpy(led_info, pdc_result2, len);
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}

/**
 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
 * @retval: -1 on error, 0 on success. Other value are PDC errors
 * 
 * Must be correctly formatted or expect system crash
 */
#ifdef CONFIG_64BIT
int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
{
	int retval = 0;
	unsigned long flags;
        
	if (!is_pdc_pat())
		return -1;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}
#endif

/**
 * pdc_chassis_disp - Updates chassis code
 * @retval: -1 on error, 0 on success
 */
int pdc_chassis_disp(unsigned long disp)
{
	int retval = 0;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_chassis_warn - Fetches chassis warnings
 * @retval: -1 on error, 0 on success
 */
int pdc_chassis_warn(unsigned long *warn)
{
	int retval = 0;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
	*warn = pdc_result[0];
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info)
{
	int ret;

	ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
	convert_to_wide(pdc_result);
	pdc_coproc_info->ccr_functional = pdc_result[0];
	pdc_coproc_info->ccr_present = pdc_result[1];
	pdc_coproc_info->revision = pdc_result[17];
	pdc_coproc_info->model = pdc_result[18];

	return ret;
}

/**
 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
 * @pdc_coproc_info: Return buffer address.
 *
 * This PDC call returns the presence and status of all the coprocessors
 * attached to the processor.
 */
int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
{
	int ret;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	ret = pdc_coproc_cfg_unlocked(pdc_coproc_info);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return ret;
}

/**
 * pdc_iodc_read - Read data from the modules IODC.
 * @actcnt: The actual number of bytes.
 * @hpa: The HPA of the module for the iodc read.
 * @index: The iodc entry point.
 * @iodc_data: A buffer memory for the iodc options.
 * @iodc_data_size: Size of the memory buffer.
 *
 * This PDC call reads from the IODC of the module specified by the hpa
 * argument.
 */
int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
		  void *iodc_data, unsigned int iodc_data_size)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa, 
			      index, __pa(pdc_result2), iodc_data_size);
	convert_to_wide(pdc_result);
	*actcnt = pdc_result[0];
	memcpy(iodc_data, pdc_result2, iodc_data_size);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}
EXPORT_SYMBOL(pdc_iodc_read);

/**
 * pdc_system_map_find_mods - Locate unarchitected modules.
 * @pdc_mod_info: Return buffer address.
 * @mod_path: pointer to dev path structure.
 * @mod_index: fixed address module index.
 *
 * To locate and identify modules which reside at fixed I/O addresses, which
 * do not self-identify via architected bus walks.
 */
int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
			     struct pdc_module_path *mod_path, long mod_index)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result), 
			      __pa(pdc_result2), mod_index);
	convert_to_wide(pdc_result);
	memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
	memcpy(mod_path, pdc_result2, sizeof(*mod_path));
	spin_unlock_irqrestore(&pdc_lock, flags);

	pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
	return retval;
}

/**
 * pdc_system_map_find_addrs - Retrieve additional address ranges.
 * @pdc_addr_info: Return buffer address.
 * @mod_index: Fixed address module index.
 * @addr_index: Address range index.
 * 
 * Retrieve additional information about subsequent address ranges for modules
 * with multiple address ranges.  
 */
int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info, 
			      long mod_index, long addr_index)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
			      mod_index, addr_index);
	convert_to_wide(pdc_result);
	memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
	spin_unlock_irqrestore(&pdc_lock, flags);

	pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
	return retval;
}

/**
 * pdc_model_info - Return model information about the processor.
 * @model: The return buffer.
 *
 * Returns the version numbers, identifiers, and capabilities from the processor module.
 */
int pdc_model_info(struct pdc_model *model) 
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
	convert_to_wide(pdc_result);
	memcpy(model, pdc_result, sizeof(*model));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_model_sysmodel - Get the system model name.
 * @name: A char array of at least 81 characters.
 *
 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
 * on HP/UX.
 */
int pdc_model_sysmodel(char *name)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
                              OS_ID_HPUX, __pa(name));
        convert_to_wide(pdc_result);

        if (retval == PDC_OK) {
                name[pdc_result[0]] = '\0'; /* add trailing '\0' */
        } else {
                name[0] = 0;
        }
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}

/**
 * pdc_model_versions - Identify the version number of each processor.
 * @cpu_id: The return buffer.
 * @id: The id of the processor to check.
 *
 * Returns the version number for each processor component.
 *
 * This comment was here before, but I do not know what it means :( -RB
 * id: 0 = cpu revision, 1 = boot-rom-version
 */
int pdc_model_versions(unsigned long *versions, int id)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
        convert_to_wide(pdc_result);
        *versions = pdc_result[0];
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}

/**
 * pdc_model_cpuid - Returns the CPU_ID.
 * @cpu_id: The return buffer.
 *
 * Returns the CPU_ID value which uniquely identifies the cpu portion of
 * the processor module.
 */
int pdc_model_cpuid(unsigned long *cpu_id)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
        convert_to_wide(pdc_result);
        *cpu_id = pdc_result[0];
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}

/**
 * pdc_model_capabilities - Returns the platform capabilities.
 * @capabilities: The return buffer.
 *
 * Returns information about platform support for 32- and/or 64-bit
 * OSes, IO-PDIR coherency, and virtual aliasing.
 */
int pdc_model_capabilities(unsigned long *capabilities)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
        convert_to_wide(pdc_result);
        if (retval == PDC_OK) {
                *capabilities = pdc_result[0];
        } else {
                *capabilities = PDC_MODEL_OS32;
        }
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}

/**
 * pdc_cache_info - Return cache and TLB information.
 * @cache_info: The return buffer.
 *
 * Returns information about the processor's cache and TLB.
 */
int pdc_cache_info(struct pdc_cache_info *cache_info)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
        convert_to_wide(pdc_result);
        memcpy(cache_info, pdc_result, sizeof(*cache_info));
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}

/**
 * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
 * @space_bits: Should be 0, if not, bad mojo!
 *
 * Returns information about Space ID hashing.
 */
int pdc_spaceid_bits(unsigned long *space_bits)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	pdc_result[0] = 0;
	retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
	convert_to_wide(pdc_result);
	*space_bits = pdc_result[0];
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

#ifndef CONFIG_PA20
/**
 * pdc_btlb_info - Return block TLB information.
 * @btlb: The return buffer.
 *
 * Returns information about the hardware Block TLB.
 */
int pdc_btlb_info(struct pdc_btlb_info *btlb) 
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
        memcpy(btlb, pdc_result, sizeof(*btlb));
        spin_unlock_irqrestore(&pdc_lock, flags);

        if(retval < 0) {
                btlb->max_size = 0;
        }
        return retval;
}

/**
 * pdc_mem_map_hpa - Find fixed module information.  
 * @address: The return buffer
 * @mod_path: pointer to dev path structure.
 *
 * This call was developed for S700 workstations to allow the kernel to find
 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
 * call.
 *
 * This call is supported by all existing S700 workstations (up to  Gecko).
 */
int pdc_mem_map_hpa(struct pdc_memory_map *address,
		struct pdc_module_path *mod_path)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        memcpy(pdc_result2, mod_path, sizeof(*mod_path));
        retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
				__pa(pdc_result2));
        memcpy(address, pdc_result, sizeof(*address));
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}
#endif	/* !CONFIG_PA20 */

/**
 * pdc_lan_station_id - Get the LAN address.
 * @lan_addr: The return buffer.
 * @hpa: The network device HPA.
 *
 * Get the LAN station address when it is not directly available from the LAN hardware.
 */
int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
			__pa(pdc_result), hpa);
	if (retval < 0) {
		/* FIXME: else read MAC from NVRAM */
		memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
	} else {
		memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
	}
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}
EXPORT_SYMBOL(pdc_lan_station_id);

/**
 * pdc_stable_read - Read data from Stable Storage.
 * @staddr: Stable Storage address to access.
 * @memaddr: The memory address where Stable Storage data shall be copied.
 * @count: number of bytes to transfer. count is multiple of 4.
 *
 * This PDC call reads from the Stable Storage address supplied in staddr
 * and copies count bytes to the memory address memaddr.
 * The call will fail if staddr+count > PDC_STABLE size.
 */
int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
{
       int retval;
	unsigned long flags;

       spin_lock_irqsave(&pdc_lock, flags);
       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
               __pa(pdc_result), count);
       convert_to_wide(pdc_result);
       memcpy(memaddr, pdc_result, count);
       spin_unlock_irqrestore(&pdc_lock, flags);

       return retval;
}
EXPORT_SYMBOL(pdc_stable_read);

/**
 * pdc_stable_write - Write data to Stable Storage.
 * @staddr: Stable Storage address to access.
 * @memaddr: The memory address where Stable Storage data shall be read from.
 * @count: number of bytes to transfer. count is multiple of 4.
 *
 * This PDC call reads count bytes from the supplied memaddr address,
 * and copies count bytes to the Stable Storage address staddr.
 * The call will fail if staddr+count > PDC_STABLE size.
 */
int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
{
       int retval;
	unsigned long flags;

       spin_lock_irqsave(&pdc_lock, flags);
       memcpy(pdc_result, memaddr, count);
       convert_to_wide(pdc_result);
       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
               __pa(pdc_result), count);
       spin_unlock_irqrestore(&pdc_lock, flags);

       return retval;
}
EXPORT_SYMBOL(pdc_stable_write);

/**
 * pdc_stable_get_size - Get Stable Storage size in bytes.
 * @size: pointer where the size will be stored.
 *
 * This PDC call returns the number of bytes in the processor's Stable
 * Storage, which is the number of contiguous bytes implemented in Stable
 * Storage starting from staddr=0. size in an unsigned 64-bit integer
 * which is a multiple of four.
 */
int pdc_stable_get_size(unsigned long *size)
{
       int retval;
	unsigned long flags;

       spin_lock_irqsave(&pdc_lock, flags);
       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
       *size = pdc_result[0];
       spin_unlock_irqrestore(&pdc_lock, flags);

       return retval;
}
EXPORT_SYMBOL(pdc_stable_get_size);

/**
 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
 *
 * This PDC call is meant to be used to check the integrity of the current
 * contents of Stable Storage.
 */
int pdc_stable_verify_contents(void)
{
       int retval;
	unsigned long flags;

       spin_lock_irqsave(&pdc_lock, flags);
       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
       spin_unlock_irqrestore(&pdc_lock, flags);

       return retval;
}
EXPORT_SYMBOL(pdc_stable_verify_contents);

/**
 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
 * the validity indicator.
 *
 * This PDC call will erase all contents of Stable Storage. Use with care!
 */
int pdc_stable_initialize(void)
{
       int retval;
	unsigned long flags;

       spin_lock_irqsave(&pdc_lock, flags);
       retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
       spin_unlock_irqrestore(&pdc_lock, flags);

       return retval;
}
EXPORT_SYMBOL(pdc_stable_initialize);

/**
 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
 * @hwpath: fully bc.mod style path to the device.
 * @initiator: the array to return the result into
 *
 * Get the SCSI operational parameters from PDC.
 * Needed since HPUX never used BIOS or symbios card NVRAM.
 * Most ncr/sym cards won't have an entry and just use whatever
 * capabilities of the card are (eg Ultra, LVD). But there are
 * several cases where it's useful:
 *    o set SCSI id for Multi-initiator clusters,
 *    o cable too long (ie SE scsi 10Mhz won't support 6m length),
 *    o bus width exported is less than what the interface chip supports.
 */
int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);

/* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
#define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
	strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)

	retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR, 
			      __pa(pdc_result), __pa(hwpath));
	if (retval < PDC_OK)
		goto out;

	if (pdc_result[0] < 16) {
		initiator->host_id = pdc_result[0];
	} else {
		initiator->host_id = -1;
	}

	/*
	 * Sprockets and Piranha return 20 or 40 (MT/s).  Prelude returns
	 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
	 */
	switch (pdc_result[1]) {
		case  1: initiator->factor = 50; break;
		case  2: initiator->factor = 25; break;
		case  5: initiator->factor = 12; break;
		case 25: initiator->factor = 10; break;
		case 20: initiator->factor = 12; break;
		case 40: initiator->factor = 10; break;
		default: initiator->factor = -1; break;
	}

	if (IS_SPROCKETS()) {
		initiator->width = pdc_result[4];
		initiator->mode = pdc_result[5];
	} else {
		initiator->width = -1;
		initiator->mode = -1;
	}

 out:
	spin_unlock_irqrestore(&pdc_lock, flags);

	return (retval >= PDC_OK);
}
EXPORT_SYMBOL(pdc_get_initiator);


/**
 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
 * @num_entries: The return value.
 * @hpa: The HPA for the device.
 *
 * This PDC function returns the number of entries in the specified cell's
 * interrupt table.
 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
 */ 
int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, 
			      __pa(pdc_result), hpa);
	convert_to_wide(pdc_result);
	*num_entries = pdc_result[0];
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/** 
 * pdc_pci_irt - Get the PCI interrupt routing table.
 * @num_entries: The number of entries in the table.
 * @hpa: The Hard Physical Address of the device.
 * @tbl: 
 *
 * Get the PCI interrupt routing table for the device at the given HPA.
 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
 */
int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
{
	int retval;
	unsigned long flags;

	BUG_ON((unsigned long)tbl & 0x7);

	spin_lock_irqsave(&pdc_lock, flags);
	pdc_result[0] = num_entries;
	retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, 
			      __pa(pdc_result), hpa, __pa(tbl));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}


#if 0	/* UNTEST CODE - left here in case someone needs it */

/** 
 * pdc_pci_config_read - read PCI config space.
 * @hpa		token from PDC to indicate which PCI device
 * @pci_addr	configuration space address to read from
 *
 * Read PCI Configuration space *before* linux PCI subsystem is running.
 */
unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	pdc_result[0] = 0;
	pdc_result[1] = 0;
	retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG, 
			      __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval ? ~0 : (unsigned int) pdc_result[0];
}


/** 
 * pdc_pci_config_write - read PCI config space.
 * @hpa		token from PDC to indicate which PCI device
 * @pci_addr	configuration space address to write
 * @val		value we want in the 32-bit register
 *
 * Write PCI Configuration space *before* linux PCI subsystem is running.
 */
void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	pdc_result[0] = 0;
	retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG, 
			      __pa(pdc_result), hpa,
			      cfg_addr&~3UL, 4UL, (unsigned long) val);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}
#endif /* UNTESTED CODE */

/**
 * pdc_tod_read - Read the Time-Of-Day clock.
 * @tod: The return buffer:
 *
 * Read the Time-Of-Day clock
 */
int pdc_tod_read(struct pdc_tod *tod)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
        convert_to_wide(pdc_result);
        memcpy(tod, pdc_result, sizeof(*tod));
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}
EXPORT_SYMBOL(pdc_tod_read);

int pdc_mem_pdt_info(struct pdc_mem_retinfo *rinfo)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_MEM, PDC_MEM_MEMINFO, __pa(pdc_result), 0);
	convert_to_wide(pdc_result);
	memcpy(rinfo, pdc_result, sizeof(*rinfo));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
		unsigned long *pdt_entries_ptr)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_MEM, PDC_MEM_READ_PDT, __pa(pdc_result),
			__pa(pdt_entries_ptr));
	if (retval == PDC_OK) {
		convert_to_wide(pdc_result);
		memcpy(pret, pdc_result, sizeof(*pret));
	}
	spin_unlock_irqrestore(&pdc_lock, flags);

#ifdef CONFIG_64BIT
	/*
	 * 64-bit kernels should not call this PDT function in narrow mode.
	 * The pdt_entries_ptr array above will now contain 32-bit values
	 */
	if (WARN_ON_ONCE((retval == PDC_OK) && parisc_narrow_firmware))
		return PDC_ERROR;
#endif

	return retval;
}

/**
 * pdc_tod_set - Set the Time-Of-Day clock.
 * @sec: The number of seconds since epoch.
 * @usec: The number of micro seconds.
 *
 * Set the Time-Of-Day clock.
 */ 
int pdc_tod_set(unsigned long sec, unsigned long usec)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}
EXPORT_SYMBOL(pdc_tod_set);

#ifdef CONFIG_64BIT
int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
		struct pdc_memory_table *tbl, unsigned long entries)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
	convert_to_wide(pdc_result);
	memcpy(r_addr, pdc_result, sizeof(*r_addr));
	memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}
#endif /* CONFIG_64BIT */

/* FIXME: Is this pdc used?  I could not find type reference to ftc_bitmap
 * so I guessed at unsigned long.  Someone who knows what this does, can fix
 * it later. :)
 */
int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
                              PDC_FIRM_TEST_MAGIC, ftc_bitmap);
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}

/*
 * pdc_do_reset - Reset the system.
 *
 * Reset the system.
 */
int pdc_do_reset(void)
{
        int retval;
	unsigned long flags;

        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
        spin_unlock_irqrestore(&pdc_lock, flags);

        return retval;
}

/*
 * pdc_soft_power_info - Enable soft power switch.
 * @power_reg: address of soft power register
 *
 * Return the absolute address of the soft power switch register
 */
int __init pdc_soft_power_info(unsigned long *power_reg)
{
	int retval;
	unsigned long flags;

	*power_reg = (unsigned long) (-1);
	
	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
	if (retval == PDC_OK) {
                convert_to_wide(pdc_result);
                *power_reg = f_extend(pdc_result[0]);
	}
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/*
 * pdc_soft_power_button - Control the soft power button behaviour
 * @sw_control: 0 for hardware control, 1 for software control 
 *
 *
 * This PDC function places the soft power button under software or
 * hardware control.
 * Under software control the OS may control to when to allow to shut 
 * down the system. Under hardware control pressing the power button 
 * powers off the system immediately.
 */
int pdc_soft_power_button(int sw_control)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/*
 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
 * Primarily a problem on T600 (which parisc-linux doesn't support) but
 * who knows what other platform firmware might do with this OS "hook".
 */
void pdc_io_reset(void)
{
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
	spin_unlock_irqrestore(&pdc_lock, flags);
}

/*
 * pdc_io_reset_devices - Hack to Stop USB controller
 *
 * If PDC used the usb controller, the usb controller
 * is still running and will crash the machines during iommu 
 * setup, because of still running DMA. This PDC call
 * stops the USB controller.
 * Normally called after calling pdc_io_reset().
 */
void pdc_io_reset_devices(void)
{
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
	spin_unlock_irqrestore(&pdc_lock, flags);
}

#endif /* defined(BOOTLOADER) */

/* locked by pdc_console_lock */
static int __attribute__((aligned(8)))   iodc_retbuf[32];
static char __attribute__((aligned(64))) iodc_dbuf[4096];

/**
 * pdc_iodc_print - Console print using IODC.
 * @str: the string to output.
 * @count: length of str
 *
 * Note that only these special chars are architected for console IODC io:
 * BEL, BS, CR, and LF. Others are passed through.
 * Since the HP console requires CR+LF to perform a 'newline', we translate
 * "\n" to "\r\n".
 */
int pdc_iodc_print(const unsigned char *str, unsigned count)
{
	unsigned int i;
	unsigned long flags;

	for (i = 0; i < count;) {
		switch(str[i]) {
		case '\n':
			iodc_dbuf[i+0] = '\r';
			iodc_dbuf[i+1] = '\n';
			i += 2;
			goto print;
		default:
			iodc_dbuf[i] = str[i];
			i++;
			break;
		}
	}

print:
        spin_lock_irqsave(&pdc_lock, flags);
        real32_call(PAGE0->mem_cons.iodc_io,
                    (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
                    PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
                    __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0);
        spin_unlock_irqrestore(&pdc_lock, flags);

	return i;
}

#if !defined(BOOTLOADER)
/**
 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
 *
 * Read a character (non-blocking) from the PDC console, returns -1 if
 * key is not present.
 */
int pdc_iodc_getc(void)
{
	int ch;
	int status;
	unsigned long flags;

	/* Bail if no console input device. */
	if (!PAGE0->mem_kbd.iodc_io)
		return 0;
	
	/* wait for a keyboard (rs232)-input */
	spin_lock_irqsave(&pdc_lock, flags);
	real32_call(PAGE0->mem_kbd.iodc_io,
		    (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
		    PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), 
		    __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);

	ch = *iodc_dbuf;
	status = *iodc_retbuf;
	spin_unlock_irqrestore(&pdc_lock, flags);

	if (status == 0)
	    return -1;
	
	return ch;
}

int pdc_sti_call(unsigned long func, unsigned long flags,
                 unsigned long inptr, unsigned long outputr,
                 unsigned long glob_cfg)
{
        int retval;
	unsigned long irqflags;

        spin_lock_irqsave(&pdc_lock, irqflags);  
        retval = real32_call(func, flags, inptr, outputr, glob_cfg);
        spin_unlock_irqrestore(&pdc_lock, irqflags);

        return retval;
}
EXPORT_SYMBOL(pdc_sti_call);

#ifdef CONFIG_64BIT
/**
 * pdc_pat_cell_get_number - Returns the cell number.
 * @cell_info: The return buffer.
 *
 * This PDC call returns the cell number of the cell from which the call
 * is made.
 */
int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
	memcpy(cell_info, pdc_result, sizeof(*cell_info));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_cell_module - Retrieve the cell's module information.
 * @actcnt: The number of bytes written to mem_addr.
 * @ploc: The physical location.
 * @mod: The module index.
 * @view_type: The view of the address type.
 * @mem_addr: The return buffer.
 *
 * This PDC call returns information about each module attached to the cell
 * at the specified location.
 */
int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
			unsigned long view_type, void *mem_addr)
{
	int retval;
	unsigned long flags;
	static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), 
			      ploc, mod, view_type, __pa(&result));
	if(!retval) {
		*actcnt = pdc_result[0];
		memcpy(mem_addr, &result, *actcnt);
	}
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_cpu_get_number - Retrieve the cpu number.
 * @cpu_info: The return buffer.
 * @hpa: The Hard Physical Address of the CPU.
 *
 * Retrieve the cpu number for the cpu at the specified HPA.
 */
int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, unsigned long hpa)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
			      __pa(&pdc_result), hpa);
	memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
 * @num_entries: The return value.
 * @cell_num: The target cell.
 *
 * This PDC function returns the number of entries in the specified cell's
 * interrupt table.
 */
int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
			      __pa(pdc_result), cell_num);
	*num_entries = pdc_result[0];
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
 * @r_addr: The return buffer.
 * @cell_num: The target cell.
 *
 * This PDC function returns the actual interrupt table for the specified cell.
 */
int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
			      __pa(r_addr), cell_num);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
 * @actlen: The return buffer.
 * @mem_addr: Pointer to the memory buffer.
 * @count: The number of bytes to read from the buffer.
 * @offset: The offset with respect to the beginning of the buffer.
 *
 */
int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr, 
			    unsigned long count, unsigned long offset)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), 
			      __pa(pdc_result2), count, offset);
	*actual_len = pdc_result[0];
	memcpy(mem_addr, pdc_result2, *actual_len);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
 * @pci_addr: PCI configuration space address for which the read request is being made.
 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4. 
 * @mem_addr: Pointer to return memory buffer.
 *
 */
int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
					__pa(pdc_result), pci_addr, pci_size);
	switch(pci_size) {
		case 1: *(u8 *) mem_addr =  (u8)  pdc_result[0]; break;
		case 2: *(u16 *)mem_addr =  (u16) pdc_result[0]; break;
		case 4: *(u32 *)mem_addr =  (u32) pdc_result[0]; break;
	}
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
 * @pci_addr: PCI configuration space address for which the write  request is being made.
 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. 
 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be 
 *         written to PCI Config space.
 *
 */
int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
				pci_addr, pci_size, val);
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_mem_pdc_info - Retrieve information about page deallocation table
 * @rinfo: memory pdt information
 *
 */
int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_INFO,
			__pa(&pdc_result));
	if (retval == PDC_OK)
		memcpy(rinfo, &pdc_result, sizeof(*rinfo));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_mem_pdt_cell_info - Retrieve information about page deallocation
 *				table of a cell
 * @rinfo: memory pdt information
 * @cell: cell number
 *
 */
int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo,
		unsigned long cell)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_INFO,
			__pa(&pdc_result), cell);
	if (retval == PDC_OK)
		memcpy(rinfo, &pdc_result, sizeof(*rinfo));
	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_mem_read_cell_pdt - Read PDT entries from (old) PAT firmware
 * @pret: array of PDT entries
 * @pdt_entries_ptr: ptr to hold number of PDT entries
 * @max_entries: maximum number of entries to be read
 *
 */
int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
		unsigned long *pdt_entries_ptr, unsigned long max_entries)
{
	int retval;
	unsigned long flags, entries;

	spin_lock_irqsave(&pdc_lock, flags);
	/* PDC_PAT_MEM_CELL_READ is available on early PAT machines only */
	retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_READ,
			__pa(&pdc_result), parisc_cell_num,
			__pa(pdt_entries_ptr));

	if (retval == PDC_OK) {
		/* build up return value as for PDC_PAT_MEM_PD_READ */
		entries = min(pdc_result[0], max_entries);
		pret->pdt_entries = entries;
		pret->actual_count_bytes = entries * sizeof(unsigned long);
	}

	spin_unlock_irqrestore(&pdc_lock, flags);
	WARN_ON(retval == PDC_OK && pdc_result[0] > max_entries);

	return retval;
}
/**
 * pdc_pat_mem_read_pd_pdt - Read PDT entries from (newer) PAT firmware
 * @pret: array of PDT entries
 * @pdt_entries_ptr: ptr to hold number of PDT entries
 * @count: number of bytes to read
 * @offset: offset to start (in bytes)
 *
 */
int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
		unsigned long *pdt_entries_ptr, unsigned long count,
		unsigned long offset)
{
	int retval;
	unsigned long flags, entries;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_READ,
		__pa(&pdc_result), __pa(pdt_entries_ptr),
		count, offset);

	if (retval == PDC_OK) {
		entries = min(pdc_result[0], count);
		pret->actual_count_bytes = entries;
		pret->pdt_entries = entries / sizeof(unsigned long);
	}

	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}

/**
 * pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware
 * @pret: ptr to hold returned information
 * @phys_addr: physical address to examine
 *
 */
int pdc_pat_mem_get_dimm_phys_location(
		struct pdc_pat_mem_phys_mem_location *pret,
		unsigned long phys_addr)
{
	int retval;
	unsigned long flags;

	spin_lock_irqsave(&pdc_lock, flags);
	retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS,
		__pa(&pdc_result), phys_addr);

	if (retval == PDC_OK)
		memcpy(pret, &pdc_result, sizeof(*pret));

	spin_unlock_irqrestore(&pdc_lock, flags);

	return retval;
}
#endif /* CONFIG_64BIT */
#endif /* defined(BOOTLOADER) */


/***************** 32-bit real-mode calls ***********/
/* The struct below is used
 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
 * real32_call_asm() then uses this stack in narrow real mode
 */

struct narrow_stack {
	/* use int, not long which is 64 bits */
	unsigned int arg13;
	unsigned int arg12;
	unsigned int arg11;
	unsigned int arg10;
	unsigned int arg9;
	unsigned int arg8;
	unsigned int arg7;
	unsigned int arg6;
	unsigned int arg5;
	unsigned int arg4;
	unsigned int arg3;
	unsigned int arg2;
	unsigned int arg1;
	unsigned int arg0;
	unsigned int frame_marker[8];
	unsigned int sp;
	/* in reality, there's nearly 8k of stack after this */
};

long real32_call(unsigned long fn, ...)
{
	va_list args;
	extern struct narrow_stack real_stack;
	extern unsigned long real32_call_asm(unsigned int *,
					     unsigned int *, 
					     unsigned int);
	
	va_start(args, fn);
	real_stack.arg0 = va_arg(args, unsigned int);
	real_stack.arg1 = va_arg(args, unsigned int);
	real_stack.arg2 = va_arg(args, unsigned int);
	real_stack.arg3 = va_arg(args, unsigned int);
	real_stack.arg4 = va_arg(args, unsigned int);
	real_stack.arg5 = va_arg(args, unsigned int);
	real_stack.arg6 = va_arg(args, unsigned int);
	real_stack.arg7 = va_arg(args, unsigned int);
	real_stack.arg8 = va_arg(args, unsigned int);
	real_stack.arg9 = va_arg(args, unsigned int);
	real_stack.arg10 = va_arg(args, unsigned int);
	real_stack.arg11 = va_arg(args, unsigned int);
	real_stack.arg12 = va_arg(args, unsigned int);
	real_stack.arg13 = va_arg(args, unsigned int);
	va_end(args);
	
	return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
}

#ifdef CONFIG_64BIT
/***************** 64-bit real-mode calls ***********/

struct wide_stack {
	unsigned long arg0;
	unsigned long arg1;
	unsigned long arg2;
	unsigned long arg3;
	unsigned long arg4;
	unsigned long arg5;
	unsigned long arg6;
	unsigned long arg7;
	unsigned long arg8;
	unsigned long arg9;
	unsigned long arg10;
	unsigned long arg11;
	unsigned long arg12;
	unsigned long arg13;
	unsigned long frame_marker[2];	/* rp, previous sp */
	unsigned long sp;
	/* in reality, there's nearly 8k of stack after this */
};

long real64_call(unsigned long fn, ...)
{
	va_list args;
	extern struct wide_stack real64_stack;
	extern unsigned long real64_call_asm(unsigned long *,
					     unsigned long *, 
					     unsigned long);
    
	va_start(args, fn);
	real64_stack.arg0 = va_arg(args, unsigned long);
	real64_stack.arg1 = va_arg(args, unsigned long);
	real64_stack.arg2 = va_arg(args, unsigned long);
	real64_stack.arg3 = va_arg(args, unsigned long);
	real64_stack.arg4 = va_arg(args, unsigned long);
	real64_stack.arg5 = va_arg(args, unsigned long);
	real64_stack.arg6 = va_arg(args, unsigned long);
	real64_stack.arg7 = va_arg(args, unsigned long);
	real64_stack.arg8 = va_arg(args, unsigned long);
	real64_stack.arg9 = va_arg(args, unsigned long);
	real64_stack.arg10 = va_arg(args, unsigned long);
	real64_stack.arg11 = va_arg(args, unsigned long);
	real64_stack.arg12 = va_arg(args, unsigned long);
	real64_stack.arg13 = va_arg(args, unsigned long);
	va_end(args);
	
	return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
}

#endif /* CONFIG_64BIT */