summaryrefslogtreecommitdiff
path: root/arch/sparc64/kernel/prom.c
blob: 8a70c52c0447a92d593e9f6f832db36635e3217e (plain)
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
/*
 * Procedures for creating, accessing and interpreting the device tree.
 *
 * Paul Mackerras	August 1996.
 * Copyright (C) 1996-2005 Paul Mackerras.
 * 
 *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
 *    {engebret|bergner}@us.ibm.com 
 *
 *  Adapted for sparc64 by David S. Miller davem@davemloft.net
 *
 *      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.
 */

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/module.h>

#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/oplib.h>
#include <asm/irq.h>
#include <asm/asi.h>
#include <asm/upa.h>

static struct device_node *allnodes;

/* use when traversing tree through the allnext, child, sibling,
 * or parent members of struct device_node.
 */
static DEFINE_RWLOCK(devtree_lock);

int of_device_is_compatible(struct device_node *device, const char *compat)
{
	const char* cp;
	int cplen, l;

	cp = (char *) of_get_property(device, "compatible", &cplen);
	if (cp == NULL)
		return 0;
	while (cplen > 0) {
		if (strncmp(cp, compat, strlen(compat)) == 0)
			return 1;
		l = strlen(cp) + 1;
		cp += l;
		cplen -= l;
	}

	return 0;
}
EXPORT_SYMBOL(of_device_is_compatible);

struct device_node *of_get_parent(const struct device_node *node)
{
	struct device_node *np;

	if (!node)
		return NULL;

	np = node->parent;

	return np;
}
EXPORT_SYMBOL(of_get_parent);

struct device_node *of_get_next_child(const struct device_node *node,
	struct device_node *prev)
{
	struct device_node *next;

	next = prev ? prev->sibling : node->child;
	for (; next != 0; next = next->sibling) {
		break;
	}

	return next;
}
EXPORT_SYMBOL(of_get_next_child);

struct device_node *of_find_node_by_path(const char *path)
{
	struct device_node *np = allnodes;

	for (; np != 0; np = np->allnext) {
		if (np->full_name != 0 && strcmp(np->full_name, path) == 0)
			break;
	}

	return np;
}
EXPORT_SYMBOL(of_find_node_by_path);

struct device_node *of_find_node_by_phandle(phandle handle)
{
	struct device_node *np;

	for (np = allnodes; np != 0; np = np->allnext)
		if (np->node == handle)
			break;

	return np;
}
EXPORT_SYMBOL(of_find_node_by_phandle);

struct device_node *of_find_node_by_name(struct device_node *from,
	const char *name)
{
	struct device_node *np;

	np = from ? from->allnext : allnodes;
	for (; np != NULL; np = np->allnext)
		if (np->name != NULL && strcmp(np->name, name) == 0)
			break;

	return np;
}
EXPORT_SYMBOL(of_find_node_by_name);

struct device_node *of_find_node_by_type(struct device_node *from,
	const char *type)
{
	struct device_node *np;

	np = from ? from->allnext : allnodes;
	for (; np != 0; np = np->allnext)
		if (np->type != 0 && strcmp(np->type, type) == 0)
			break;

	return np;
}
EXPORT_SYMBOL(of_find_node_by_type);

struct device_node *of_find_compatible_node(struct device_node *from,
	const char *type, const char *compatible)
{
	struct device_node *np;

	np = from ? from->allnext : allnodes;
	for (; np != 0; np = np->allnext) {
		if (type != NULL
		    && !(np->type != 0 && strcmp(np->type, type) == 0))
			continue;
		if (of_device_is_compatible(np, compatible))
			break;
	}

	return np;
}
EXPORT_SYMBOL(of_find_compatible_node);

struct property *of_find_property(struct device_node *np, const char *name,
				  int *lenp)
{
	struct property *pp;

	for (pp = np->properties; pp != 0; pp = pp->next) {
		if (strcmp(pp->name, name) == 0) {
			if (lenp != 0)
				*lenp = pp->length;
			break;
		}
	}
	return pp;
}
EXPORT_SYMBOL(of_find_property);

/*
 * Find a property with a given name for a given node
 * and return the value.
 */
void *of_get_property(struct device_node *np, const char *name, int *lenp)
{
	struct property *pp = of_find_property(np,name,lenp);
	return pp ? pp->value : NULL;
}
EXPORT_SYMBOL(of_get_property);

int of_getintprop_default(struct device_node *np, const char *name, int def)
{
	struct property *prop;
	int len;

	prop = of_find_property(np, name, &len);
	if (!prop || len != 4)
		return def;

	return *(int *) prop->value;
}
EXPORT_SYMBOL(of_getintprop_default);

int of_n_addr_cells(struct device_node *np)
{
	int* ip;
	do {
		if (np->parent)
			np = np->parent;
		ip = of_get_property(np, "#address-cells", NULL);
		if (ip != NULL)
			return *ip;
	} while (np->parent);
	/* No #address-cells property for the root node, default to 2 */
	return 2;
}
EXPORT_SYMBOL(of_n_addr_cells);

int of_n_size_cells(struct device_node *np)
{
	int* ip;
	do {
		if (np->parent)
			np = np->parent;
		ip = of_get_property(np, "#size-cells", NULL);
		if (ip != NULL)
			return *ip;
	} while (np->parent);
	/* No #size-cells property for the root node, default to 1 */
	return 1;
}
EXPORT_SYMBOL(of_n_size_cells);

int of_set_property(struct device_node *dp, const char *name, void *val, int len)
{
	struct property **prevp;
	void *new_val;
	int err;

	new_val = kmalloc(len, GFP_KERNEL);
	if (!new_val)
		return -ENOMEM;

	memcpy(new_val, val, len);

	err = -ENODEV;

	write_lock(&devtree_lock);
	prevp = &dp->properties;
	while (*prevp) {
		struct property *prop = *prevp;

		if (!strcmp(prop->name, name)) {
			void *old_val = prop->value;
			int ret;

			ret = prom_setprop(dp->node, name, val, len);
			err = -EINVAL;
			if (ret >= 0) {
				prop->value = new_val;
				prop->length = len;

				if (OF_IS_DYNAMIC(prop))
					kfree(old_val);

				OF_MARK_DYNAMIC(prop);

				err = 0;
			}
			break;
		}
		prevp = &(*prevp)->next;
	}
	write_unlock(&devtree_lock);

	/* XXX Upate procfs if necessary... */

	return err;
}
EXPORT_SYMBOL(of_set_property);

static unsigned int prom_early_allocated;

static void * __init prom_early_alloc(unsigned long size)
{
	void *ret;

	ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
	if (ret != NULL)
		memset(ret, 0, size);

	prom_early_allocated += size;

	return ret;
}

#ifdef CONFIG_PCI
/* PSYCHO interrupt mapping support. */
#define PSYCHO_IMAP_A_SLOT0	0x0c00UL
#define PSYCHO_IMAP_B_SLOT0	0x0c20UL
static unsigned long psycho_pcislot_imap_offset(unsigned long ino)
{
	unsigned int bus =  (ino & 0x10) >> 4;
	unsigned int slot = (ino & 0x0c) >> 2;

	if (bus == 0)
		return PSYCHO_IMAP_A_SLOT0 + (slot * 8);
	else
		return PSYCHO_IMAP_B_SLOT0 + (slot * 8);
}

#define PSYCHO_IMAP_SCSI	0x1000UL
#define PSYCHO_IMAP_ETH		0x1008UL
#define PSYCHO_IMAP_BPP		0x1010UL
#define PSYCHO_IMAP_AU_REC	0x1018UL
#define PSYCHO_IMAP_AU_PLAY	0x1020UL
#define PSYCHO_IMAP_PFAIL	0x1028UL
#define PSYCHO_IMAP_KMS		0x1030UL
#define PSYCHO_IMAP_FLPY	0x1038UL
#define PSYCHO_IMAP_SHW		0x1040UL
#define PSYCHO_IMAP_KBD		0x1048UL
#define PSYCHO_IMAP_MS		0x1050UL
#define PSYCHO_IMAP_SER		0x1058UL
#define PSYCHO_IMAP_TIM0	0x1060UL
#define PSYCHO_IMAP_TIM1	0x1068UL
#define PSYCHO_IMAP_UE		0x1070UL
#define PSYCHO_IMAP_CE		0x1078UL
#define PSYCHO_IMAP_A_ERR	0x1080UL
#define PSYCHO_IMAP_B_ERR	0x1088UL
#define PSYCHO_IMAP_PMGMT	0x1090UL
#define PSYCHO_IMAP_GFX		0x1098UL
#define PSYCHO_IMAP_EUPA	0x10a0UL

static unsigned long __psycho_onboard_imap_off[] = {
/*0x20*/	PSYCHO_IMAP_SCSI,
/*0x21*/	PSYCHO_IMAP_ETH,
/*0x22*/	PSYCHO_IMAP_BPP,
/*0x23*/	PSYCHO_IMAP_AU_REC,
/*0x24*/	PSYCHO_IMAP_AU_PLAY,
/*0x25*/	PSYCHO_IMAP_PFAIL,
/*0x26*/	PSYCHO_IMAP_KMS,
/*0x27*/	PSYCHO_IMAP_FLPY,
/*0x28*/	PSYCHO_IMAP_SHW,
/*0x29*/	PSYCHO_IMAP_KBD,
/*0x2a*/	PSYCHO_IMAP_MS,
/*0x2b*/	PSYCHO_IMAP_SER,
/*0x2c*/	PSYCHO_IMAP_TIM0,
/*0x2d*/	PSYCHO_IMAP_TIM1,
/*0x2e*/	PSYCHO_IMAP_UE,
/*0x2f*/	PSYCHO_IMAP_CE,
/*0x30*/	PSYCHO_IMAP_A_ERR,
/*0x31*/	PSYCHO_IMAP_B_ERR,
/*0x32*/	PSYCHO_IMAP_PMGMT
};
#define PSYCHO_ONBOARD_IRQ_BASE		0x20
#define PSYCHO_ONBOARD_IRQ_LAST		0x32
#define psycho_onboard_imap_offset(__ino) \
	__psycho_onboard_imap_off[(__ino) - PSYCHO_ONBOARD_IRQ_BASE]

#define PSYCHO_ICLR_A_SLOT0	0x1400UL
#define PSYCHO_ICLR_SCSI	0x1800UL

#define psycho_iclr_offset(ino)					      \
	((ino & 0x20) ? (PSYCHO_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
			(PSYCHO_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))

static unsigned int psycho_irq_build(struct device_node *dp,
				     unsigned int ino,
				     void *_data)
{
	unsigned long controller_regs = (unsigned long) _data;
	unsigned long imap, iclr;
	unsigned long imap_off, iclr_off;
	int inofixup = 0;

	ino &= 0x3f;
	if (ino < PSYCHO_ONBOARD_IRQ_BASE) {
		/* PCI slot */
		imap_off = psycho_pcislot_imap_offset(ino);
	} else {
		/* Onboard device */
		if (ino > PSYCHO_ONBOARD_IRQ_LAST) {
			prom_printf("psycho_irq_build: Wacky INO [%x]\n", ino);
			prom_halt();
		}
		imap_off = psycho_onboard_imap_offset(ino);
	}

	/* Now build the IRQ bucket. */
	imap = controller_regs + imap_off;
	imap += 4;

	iclr_off = psycho_iclr_offset(ino);
	iclr = controller_regs + iclr_off;
	iclr += 4;

	if ((ino & 0x20) == 0)
		inofixup = ino & 0x03;

	return build_irq(inofixup, iclr, imap);
}

static void psycho_irq_trans_init(struct device_node *dp)
{
	struct linux_prom64_registers *regs;

	dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
	dp->irq_trans->irq_build = psycho_irq_build;

	regs = of_get_property(dp, "reg", NULL);
	dp->irq_trans->data = (void *) regs[2].phys_addr;
}

#define sabre_read(__reg) \
({	u64 __ret; \
	__asm__ __volatile__("ldxa [%1] %2, %0" \
			     : "=r" (__ret) \
			     : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
			     : "memory"); \
	__ret; \
})

struct sabre_irq_data {
	unsigned long controller_regs;
	unsigned int pci_first_busno;
};
#define SABRE_CONFIGSPACE	0x001000000UL
#define SABRE_WRSYNC		0x1c20UL

#define SABRE_CONFIG_BASE(CONFIG_SPACE)	\
	(CONFIG_SPACE | (1UL << 24))
#define SABRE_CONFIG_ENCODE(BUS, DEVFN, REG)	\
	(((unsigned long)(BUS)   << 16) |	\
	 ((unsigned long)(DEVFN) << 8)  |	\
	 ((unsigned long)(REG)))

/* When a device lives behind a bridge deeper in the PCI bus topology
 * than APB, a special sequence must run to make sure all pending DMA
 * transfers at the time of IRQ delivery are visible in the coherency
 * domain by the cpu.  This sequence is to perform a read on the far
 * side of the non-APB bridge, then perform a read of Sabre's DMA
 * write-sync register.
 */
static void sabre_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
{
	unsigned int phys_hi = (unsigned int) (unsigned long) _arg1;
	struct sabre_irq_data *irq_data = _arg2;
	unsigned long controller_regs = irq_data->controller_regs;
	unsigned long sync_reg = controller_regs + SABRE_WRSYNC;
	unsigned long config_space = controller_regs + SABRE_CONFIGSPACE;
	unsigned int bus, devfn;
	u16 _unused;

	config_space = SABRE_CONFIG_BASE(config_space);

	bus = (phys_hi >> 16) & 0xff;
	devfn = (phys_hi >> 8) & 0xff;

	config_space |= SABRE_CONFIG_ENCODE(bus, devfn, 0x00);

	__asm__ __volatile__("membar #Sync\n\t"
			     "lduha [%1] %2, %0\n\t"
			     "membar #Sync"
			     : "=r" (_unused)
			     : "r" ((u16 *) config_space),
			       "i" (ASI_PHYS_BYPASS_EC_E_L)
			     : "memory");

	sabre_read(sync_reg);
}

#define SABRE_IMAP_A_SLOT0	0x0c00UL
#define SABRE_IMAP_B_SLOT0	0x0c20UL
#define SABRE_IMAP_SCSI		0x1000UL
#define SABRE_IMAP_ETH		0x1008UL
#define SABRE_IMAP_BPP		0x1010UL
#define SABRE_IMAP_AU_REC	0x1018UL
#define SABRE_IMAP_AU_PLAY	0x1020UL
#define SABRE_IMAP_PFAIL	0x1028UL
#define SABRE_IMAP_KMS		0x1030UL
#define SABRE_IMAP_FLPY		0x1038UL
#define SABRE_IMAP_SHW		0x1040UL
#define SABRE_IMAP_KBD		0x1048UL
#define SABRE_IMAP_MS		0x1050UL
#define SABRE_IMAP_SER		0x1058UL
#define SABRE_IMAP_UE		0x1070UL
#define SABRE_IMAP_CE		0x1078UL
#define SABRE_IMAP_PCIERR	0x1080UL
#define SABRE_IMAP_GFX		0x1098UL
#define SABRE_IMAP_EUPA		0x10a0UL
#define SABRE_ICLR_A_SLOT0	0x1400UL
#define SABRE_ICLR_B_SLOT0	0x1480UL
#define SABRE_ICLR_SCSI		0x1800UL
#define SABRE_ICLR_ETH		0x1808UL
#define SABRE_ICLR_BPP		0x1810UL
#define SABRE_ICLR_AU_REC	0x1818UL
#define SABRE_ICLR_AU_PLAY	0x1820UL
#define SABRE_ICLR_PFAIL	0x1828UL
#define SABRE_ICLR_KMS		0x1830UL
#define SABRE_ICLR_FLPY		0x1838UL
#define SABRE_ICLR_SHW		0x1840UL
#define SABRE_ICLR_KBD		0x1848UL
#define SABRE_ICLR_MS		0x1850UL
#define SABRE_ICLR_SER		0x1858UL
#define SABRE_ICLR_UE		0x1870UL
#define SABRE_ICLR_CE		0x1878UL
#define SABRE_ICLR_PCIERR	0x1880UL

static unsigned long sabre_pcislot_imap_offset(unsigned long ino)
{
	unsigned int bus =  (ino & 0x10) >> 4;
	unsigned int slot = (ino & 0x0c) >> 2;

	if (bus == 0)
		return SABRE_IMAP_A_SLOT0 + (slot * 8);
	else
		return SABRE_IMAP_B_SLOT0 + (slot * 8);
}

static unsigned long __sabre_onboard_imap_off[] = {
/*0x20*/	SABRE_IMAP_SCSI,
/*0x21*/	SABRE_IMAP_ETH,
/*0x22*/	SABRE_IMAP_BPP,
/*0x23*/	SABRE_IMAP_AU_REC,
/*0x24*/	SABRE_IMAP_AU_PLAY,
/*0x25*/	SABRE_IMAP_PFAIL,
/*0x26*/	SABRE_IMAP_KMS,
/*0x27*/	SABRE_IMAP_FLPY,
/*0x28*/	SABRE_IMAP_SHW,
/*0x29*/	SABRE_IMAP_KBD,
/*0x2a*/	SABRE_IMAP_MS,
/*0x2b*/	SABRE_IMAP_SER,
/*0x2c*/	0 /* reserved */,
/*0x2d*/	0 /* reserved */,
/*0x2e*/	SABRE_IMAP_UE,
/*0x2f*/	SABRE_IMAP_CE,
/*0x30*/	SABRE_IMAP_PCIERR,
};
#define SABRE_ONBOARD_IRQ_BASE		0x20
#define SABRE_ONBOARD_IRQ_LAST		0x30
#define sabre_onboard_imap_offset(__ino) \
	__sabre_onboard_imap_off[(__ino) - SABRE_ONBOARD_IRQ_BASE]

#define sabre_iclr_offset(ino)					      \
	((ino & 0x20) ? (SABRE_ICLR_SCSI + (((ino) & 0x1f) << 3)) :  \
			(SABRE_ICLR_A_SLOT0 + (((ino) & 0x1f)<<3)))

static unsigned int sabre_irq_build(struct device_node *dp,
				    unsigned int ino,
				    void *_data)
{
	struct sabre_irq_data *irq_data = _data;
	unsigned long controller_regs = irq_data->controller_regs;
	struct linux_prom_pci_registers *regs;
	unsigned long imap, iclr;
	unsigned long imap_off, iclr_off;
	int inofixup = 0;
	int virt_irq;

	ino &= 0x3f;
	if (ino < SABRE_ONBOARD_IRQ_BASE) {
		/* PCI slot */
		imap_off = sabre_pcislot_imap_offset(ino);
	} else {
		/* onboard device */
		if (ino > SABRE_ONBOARD_IRQ_LAST) {
			prom_printf("sabre_irq_build: Wacky INO [%x]\n", ino);
			prom_halt();
		}
		imap_off = sabre_onboard_imap_offset(ino);
	}

	/* Now build the IRQ bucket. */
	imap = controller_regs + imap_off;
	imap += 4;

	iclr_off = sabre_iclr_offset(ino);
	iclr = controller_regs + iclr_off;
	iclr += 4;

	if ((ino & 0x20) == 0)
		inofixup = ino & 0x03;

	virt_irq = build_irq(inofixup, iclr, imap);

	regs = of_get_property(dp, "reg", NULL);
	if (regs &&
	    ((regs->phys_hi >> 16) & 0xff) != irq_data->pci_first_busno) {
		irq_install_pre_handler(virt_irq,
					sabre_wsync_handler,
					(void *) (long) regs->phys_hi,
					(void *)
					controller_regs +
					SABRE_WRSYNC);
	}

	return virt_irq;
}

static void sabre_irq_trans_init(struct device_node *dp)
{
	struct linux_prom64_registers *regs;
	struct sabre_irq_data *irq_data;
	u32 *busrange;

	dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
	dp->irq_trans->irq_build = sabre_irq_build;

	irq_data = prom_early_alloc(sizeof(struct sabre_irq_data));

	regs = of_get_property(dp, "reg", NULL);
	irq_data->controller_regs = regs[0].phys_addr;

	busrange = of_get_property(dp, "bus-range", NULL);
	irq_data->pci_first_busno = busrange[0];

	dp->irq_trans->data = irq_data;
}

/* SCHIZO interrupt mapping support.  Unlike Psycho, for this controller the
 * imap/iclr registers are per-PBM.
 */
#define SCHIZO_IMAP_BASE	0x1000UL
#define SCHIZO_ICLR_BASE	0x1400UL

static unsigned long schizo_imap_offset(unsigned long ino)
{
	return SCHIZO_IMAP_BASE + (ino * 8UL);
}

static unsigned long schizo_iclr_offset(unsigned long ino)
{
	return SCHIZO_ICLR_BASE + (ino * 8UL);
}

static unsigned long schizo_ino_to_iclr(unsigned long pbm_regs,
					unsigned int ino)
{
	return pbm_regs + schizo_iclr_offset(ino) + 4;
}

static unsigned long schizo_ino_to_imap(unsigned long pbm_regs,
					unsigned int ino)
{
	return pbm_regs + schizo_imap_offset(ino) + 4;
}

#define schizo_read(__reg) \
({	u64 __ret; \
	__asm__ __volatile__("ldxa [%1] %2, %0" \
			     : "=r" (__ret) \
			     : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
			     : "memory"); \
	__ret; \
})
#define schizo_write(__reg, __val) \
	__asm__ __volatile__("stxa %0, [%1] %2" \
			     : /* no outputs */ \
			     : "r" (__val), "r" (__reg), \
			       "i" (ASI_PHYS_BYPASS_EC_E) \
			     : "memory")

static void tomatillo_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
{
	unsigned long sync_reg = (unsigned long) _arg2;
	u64 mask = 1UL << (ino & IMAP_INO);
	u64 val;
	int limit;

	schizo_write(sync_reg, mask);

	limit = 100000;
	val = 0;
	while (--limit) {
		val = schizo_read(sync_reg);
		if (!(val & mask))
			break;
	}
	if (limit <= 0) {
		printk("tomatillo_wsync_handler: DMA won't sync [%lx:%lx]\n",
		       val, mask);
	}

	if (_arg1) {
		static unsigned char cacheline[64]
			__attribute__ ((aligned (64)));

		__asm__ __volatile__("rd %%fprs, %0\n\t"
				     "or %0, %4, %1\n\t"
				     "wr %1, 0x0, %%fprs\n\t"
				     "stda %%f0, [%5] %6\n\t"
				     "wr %0, 0x0, %%fprs\n\t"
				     "membar #Sync"
				     : "=&r" (mask), "=&r" (val)
				     : "0" (mask), "1" (val),
				     "i" (FPRS_FEF), "r" (&cacheline[0]),
				     "i" (ASI_BLK_COMMIT_P));
	}
}

struct schizo_irq_data {
	unsigned long pbm_regs;
	unsigned long sync_reg;
	u32 portid;
	int chip_version;
};

static unsigned int schizo_irq_build(struct device_node *dp,
				     unsigned int ino,
				     void *_data)
{
	struct schizo_irq_data *irq_data = _data;
	unsigned long pbm_regs = irq_data->pbm_regs;
	unsigned long imap, iclr;
	int ign_fixup;
	int virt_irq;
	int is_tomatillo;

	ino &= 0x3f;

	/* Now build the IRQ bucket. */
	imap = schizo_ino_to_imap(pbm_regs, ino);
	iclr = schizo_ino_to_iclr(pbm_regs, ino);

	/* On Schizo, no inofixup occurs.  This is because each
	 * INO has it's own IMAP register.  On Psycho and Sabre
	 * there is only one IMAP register for each PCI slot even
	 * though four different INOs can be generated by each
	 * PCI slot.
	 *
	 * But, for JBUS variants (essentially, Tomatillo), we have
	 * to fixup the lowest bit of the interrupt group number.
	 */
	ign_fixup = 0;

	is_tomatillo = (irq_data->sync_reg != 0UL);

	if (is_tomatillo) {
		if (irq_data->portid & 1)
			ign_fixup = (1 << 6);
	}

	virt_irq = build_irq(ign_fixup, iclr, imap);

	if (is_tomatillo) {
		irq_install_pre_handler(virt_irq,
					tomatillo_wsync_handler,
					((irq_data->chip_version <= 4) ?
					 (void *) 1 : (void *) 0),
					(void *) irq_data->sync_reg);
	}

	return virt_irq;
}

static void schizo_irq_trans_init(struct device_node *dp)
{
	struct linux_prom64_registers *regs;
	struct schizo_irq_data *irq_data;

	dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
	dp->irq_trans->irq_build = schizo_irq_build;

	irq_data = prom_early_alloc(sizeof(struct schizo_irq_data));

	regs = of_get_property(dp, "reg", NULL);
	dp->irq_trans->data = irq_data;

	irq_data->pbm_regs = regs[0].phys_addr;
	irq_data->sync_reg = regs[3].phys_addr + 0x1a18UL;
	irq_data->portid = of_getintprop_default(dp, "portid", 0);
	irq_data->chip_version = of_getintprop_default(dp, "version#", 0);
}

static unsigned int pci_sun4v_irq_build(struct device_node *dp,
					unsigned int devino,
					void *_data)
{
	u32 devhandle = (u32) (unsigned long) _data;

	return sun4v_build_irq(devhandle, devino);
}

static void pci_sun4v_irq_trans_init(struct device_node *dp)
{
	struct linux_prom64_registers *regs;

	dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
	dp->irq_trans->irq_build = pci_sun4v_irq_build;

	regs = of_get_property(dp, "reg", NULL);
	dp->irq_trans->data = (void *) (unsigned long)
		((regs->phys_addr >> 32UL) & 0x0fffffff);
}
#endif /* CONFIG_PCI */

#ifdef CONFIG_SBUS
/* INO number to IMAP register offset for SYSIO external IRQ's.
 * This should conform to both Sunfire/Wildfire server and Fusion
 * desktop designs.
 */
#define SYSIO_IMAP_SLOT0	0x2c04UL
#define SYSIO_IMAP_SLOT1	0x2c0cUL
#define SYSIO_IMAP_SLOT2	0x2c14UL
#define SYSIO_IMAP_SLOT3	0x2c1cUL
#define SYSIO_IMAP_SCSI		0x3004UL
#define SYSIO_IMAP_ETH		0x300cUL
#define SYSIO_IMAP_BPP		0x3014UL
#define SYSIO_IMAP_AUDIO	0x301cUL
#define SYSIO_IMAP_PFAIL	0x3024UL
#define SYSIO_IMAP_KMS		0x302cUL
#define SYSIO_IMAP_FLPY		0x3034UL
#define SYSIO_IMAP_SHW		0x303cUL
#define SYSIO_IMAP_KBD		0x3044UL
#define SYSIO_IMAP_MS		0x304cUL
#define SYSIO_IMAP_SER		0x3054UL
#define SYSIO_IMAP_TIM0		0x3064UL
#define SYSIO_IMAP_TIM1		0x306cUL
#define SYSIO_IMAP_UE		0x3074UL
#define SYSIO_IMAP_CE		0x307cUL
#define SYSIO_IMAP_SBERR	0x3084UL
#define SYSIO_IMAP_PMGMT	0x308cUL
#define SYSIO_IMAP_GFX		0x3094UL
#define SYSIO_IMAP_EUPA		0x309cUL

#define bogon     ((unsigned long) -1)
static unsigned long sysio_irq_offsets[] = {
	/* SBUS Slot 0 --> 3, level 1 --> 7 */
	SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
	SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
	SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
	SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
	SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
	SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
	SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
	SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,

	/* Onboard devices (not relevant/used on SunFire). */
	SYSIO_IMAP_SCSI,
	SYSIO_IMAP_ETH,
	SYSIO_IMAP_BPP,
	bogon,
	SYSIO_IMAP_AUDIO,
	SYSIO_IMAP_PFAIL,
	bogon,
	bogon,
	SYSIO_IMAP_KMS,
	SYSIO_IMAP_FLPY,
	SYSIO_IMAP_SHW,
	SYSIO_IMAP_KBD,
	SYSIO_IMAP_MS,
	SYSIO_IMAP_SER,
	bogon,
	bogon,
	SYSIO_IMAP_TIM0,
	SYSIO_IMAP_TIM1,
	bogon,
	bogon,
	SYSIO_IMAP_UE,
	SYSIO_IMAP_CE,
	SYSIO_IMAP_SBERR,
	SYSIO_IMAP_PMGMT,
};

#undef bogon

#define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)

/* Convert Interrupt Mapping register pointer to associated
 * Interrupt Clear register pointer, SYSIO specific version.
 */
#define SYSIO_ICLR_UNUSED0	0x3400UL
#define SYSIO_ICLR_SLOT0	0x340cUL
#define SYSIO_ICLR_SLOT1	0x344cUL
#define SYSIO_ICLR_SLOT2	0x348cUL
#define SYSIO_ICLR_SLOT3	0x34ccUL
static unsigned long sysio_imap_to_iclr(unsigned long imap)
{
	unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
	return imap + diff;
}

static unsigned int sbus_of_build_irq(struct device_node *dp,
				      unsigned int ino,
				      void *_data)
{
	unsigned long reg_base = (unsigned long) _data;
	struct linux_prom_registers *regs;
	unsigned long imap, iclr;
	int sbus_slot = 0;
	int sbus_level = 0;

	ino &= 0x3f;

	regs = of_get_property(dp, "reg", NULL);
	if (regs)
		sbus_slot = regs->which_io;

	if (ino < 0x20)
		ino += (sbus_slot * 8);

	imap = sysio_irq_offsets[ino];
	if (imap == ((unsigned long)-1)) {
		prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
			    ino);
		prom_halt();
	}
	imap += reg_base;

	/* SYSIO inconsistency.  For external SLOTS, we have to select
	 * the right ICLR register based upon the lower SBUS irq level
	 * bits.
	 */
	if (ino >= 0x20) {
		iclr = sysio_imap_to_iclr(imap);
	} else {
		sbus_level = ino & 0x7;

		switch(sbus_slot) {
		case 0:
			iclr = reg_base + SYSIO_ICLR_SLOT0;
			break;
		case 1:
			iclr = reg_base + SYSIO_ICLR_SLOT1;
			break;
		case 2:
			iclr = reg_base + SYSIO_ICLR_SLOT2;
			break;
		default:
		case 3:
			iclr = reg_base + SYSIO_ICLR_SLOT3;
			break;
		};

		iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
	}
	return build_irq(sbus_level, iclr, imap);
}

static void sbus_irq_trans_init(struct device_node *dp)
{
	struct linux_prom64_registers *regs;

	dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
	dp->irq_trans->irq_build = sbus_of_build_irq;

	regs = of_get_property(dp, "reg", NULL);
	dp->irq_trans->data = (void *) (unsigned long) regs->phys_addr;
}
#endif /* CONFIG_SBUS */


static unsigned int central_build_irq(struct device_node *dp,
				      unsigned int ino,
				      void *_data)
{
	struct device_node *central_dp = _data;
	struct of_device *central_op = of_find_device_by_node(central_dp);
	struct resource *res;
	unsigned long imap, iclr;
	u32 tmp;

	if (!strcmp(dp->name, "eeprom")) {
		res = &central_op->resource[5];
	} else if (!strcmp(dp->name, "zs")) {
		res = &central_op->resource[4];
	} else if (!strcmp(dp->name, "clock-board")) {
		res = &central_op->resource[3];
	} else {
		return ino;
	}

	imap = res->start + 0x00UL;
	iclr = res->start + 0x10UL;

	/* Set the INO state to idle, and disable.  */
	upa_writel(0, iclr);
	upa_readl(iclr);

	tmp = upa_readl(imap);
	tmp &= ~0x80000000;
	upa_writel(tmp, imap);

	return build_irq(0, iclr, imap);
}

static void central_irq_trans_init(struct device_node *dp)
{
	dp->irq_trans = prom_early_alloc(sizeof(struct of_irq_controller));
	dp->irq_trans->irq_build = central_build_irq;

	dp->irq_trans->data = dp;
}

struct irq_trans {
	const char *name;
	void (*init)(struct device_node *);
};

#ifdef CONFIG_PCI
static struct irq_trans pci_irq_trans_table[] = {
	{ "SUNW,sabre", sabre_irq_trans_init },
	{ "pci108e,a000", sabre_irq_trans_init },
	{ "pci108e,a001", sabre_irq_trans_init },
	{ "SUNW,psycho", psycho_irq_trans_init },
	{ "pci108e,8000", psycho_irq_trans_init },
	{ "SUNW,schizo", schizo_irq_trans_init },
	{ "pci108e,8001", schizo_irq_trans_init },
	{ "SUNW,schizo+", schizo_irq_trans_init },
	{ "pci108e,8002", schizo_irq_trans_init },
	{ "SUNW,tomatillo", schizo_irq_trans_init },
	{ "pci108e,a801", schizo_irq_trans_init },
	{ "SUNW,sun4v-pci", pci_sun4v_irq_trans_init },
};
#endif

static void irq_trans_init(struct device_node *dp)
{
	const char *model;
	int i;

	model = of_get_property(dp, "model", NULL);
	if (!model)
		model = of_get_property(dp, "compatible", NULL);
	if (!model)
		return;

#ifdef CONFIG_PCI
	for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
		struct irq_trans *t = &pci_irq_trans_table[i];

		if (!strcmp(model, t->name))
			return t->init(dp);
	}
#endif
#ifdef CONFIG_SBUS
	if (!strcmp(dp->name, "sbus") ||
	    !strcmp(dp->name, "sbi"))
		return sbus_irq_trans_init(dp);
#endif
	if (!strcmp(dp->name, "central"))
		return central_irq_trans_init(dp->child);
}

static int is_root_node(const struct device_node *dp)
{
	if (!dp)
		return 0;

	return (dp->parent == NULL);
}

/* The following routines deal with the black magic of fully naming a
 * node.
 *
 * Certain well known named nodes are just the simple name string.
 *
 * Actual devices have an address specifier appended to the base name
 * string, like this "foo@addr".  The "addr" can be in any number of
 * formats, and the platform plus the type of the node determine the
 * format and how it is constructed.
 *
 * For children of the ROOT node, the naming convention is fixed and
 * determined by whether this is a sun4u or sun4v system.
 *
 * For children of other nodes, it is bus type specific.  So
 * we walk up the tree until we discover a "device_type" property
 * we recognize and we go from there.
 *
 * As an example, the boot device on my workstation has a full path:
 *
 *	/pci@1e,600000/ide@d/disk@0,0:c
 */
static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom64_registers *regs;
	struct property *rprop;
	u32 high_bits, low_bits, type;

	rprop = of_find_property(dp, "reg", NULL);
	if (!rprop)
		return;

	regs = rprop->value;
	if (!is_root_node(dp->parent)) {
		sprintf(tmp_buf, "%s@%x,%x",
			dp->name,
			(unsigned int) (regs->phys_addr >> 32UL),
			(unsigned int) (regs->phys_addr & 0xffffffffUL));
		return;
	}

	type = regs->phys_addr >> 60UL;
	high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
	low_bits = (regs->phys_addr & 0xffffffffUL);

	if (type == 0 || type == 8) {
		const char *prefix = (type == 0) ? "m" : "i";

		if (low_bits)
			sprintf(tmp_buf, "%s@%s%x,%x",
				dp->name, prefix,
				high_bits, low_bits);
		else
			sprintf(tmp_buf, "%s@%s%x",
				dp->name,
				prefix,
				high_bits);
	} else if (type == 12) {
		sprintf(tmp_buf, "%s@%x",
			dp->name, high_bits);
	}
}

static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom64_registers *regs;
	struct property *prop;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;
	if (!is_root_node(dp->parent)) {
		sprintf(tmp_buf, "%s@%x,%x",
			dp->name,
			(unsigned int) (regs->phys_addr >> 32UL),
			(unsigned int) (regs->phys_addr & 0xffffffffUL));
		return;
	}

	prop = of_find_property(dp, "upa-portid", NULL);
	if (!prop)
		prop = of_find_property(dp, "portid", NULL);
	if (prop) {
		unsigned long mask = 0xffffffffUL;

		if (tlb_type >= cheetah)
			mask = 0x7fffff;

		sprintf(tmp_buf, "%s@%x,%x",
			dp->name,
			*(u32 *)prop->value,
			(unsigned int) (regs->phys_addr & mask));
	}
}

/* "name@slot,offset"  */
static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom_registers *regs;
	struct property *prop;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;
	sprintf(tmp_buf, "%s@%x,%x",
		dp->name,
		regs->which_io,
		regs->phys_addr);
}

/* "name@devnum[,func]" */
static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom_pci_registers *regs;
	struct property *prop;
	unsigned int devfn;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;
	devfn = (regs->phys_hi >> 8) & 0xff;
	if (devfn & 0x07) {
		sprintf(tmp_buf, "%s@%x,%x",
			dp->name,
			devfn >> 3,
			devfn & 0x07);
	} else {
		sprintf(tmp_buf, "%s@%x",
			dp->name,
			devfn >> 3);
	}
}

/* "name@UPA_PORTID,offset" */
static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom64_registers *regs;
	struct property *prop;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	prop = of_find_property(dp, "upa-portid", NULL);
	if (!prop)
		return;

	sprintf(tmp_buf, "%s@%x,%x",
		dp->name,
		*(u32 *) prop->value,
		(unsigned int) (regs->phys_addr & 0xffffffffUL));
}

/* "name@reg" */
static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
{
	struct property *prop;
	u32 *regs;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	sprintf(tmp_buf, "%s@%x", dp->name, *regs);
}

/* "name@addrhi,addrlo" */
static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom64_registers *regs;
	struct property *prop;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	sprintf(tmp_buf, "%s@%x,%x",
		dp->name,
		(unsigned int) (regs->phys_addr >> 32UL),
		(unsigned int) (regs->phys_addr & 0xffffffffUL));
}

/* "name@bus,addr" */
static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
{
	struct property *prop;
	u32 *regs;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	/* This actually isn't right... should look at the #address-cells
	 * property of the i2c bus node etc. etc.
	 */
	sprintf(tmp_buf, "%s@%x,%x",
		dp->name, regs[0], regs[1]);
}

/* "name@reg0[,reg1]" */
static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
{
	struct property *prop;
	u32 *regs;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	if (prop->length == sizeof(u32) || regs[1] == 1) {
		sprintf(tmp_buf, "%s@%x",
			dp->name, regs[0]);
	} else {
		sprintf(tmp_buf, "%s@%x,%x",
			dp->name, regs[0], regs[1]);
	}
}

/* "name@reg0reg1[,reg2reg3]" */
static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
{
	struct property *prop;
	u32 *regs;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	if (regs[2] || regs[3]) {
		sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
			dp->name, regs[0], regs[1], regs[2], regs[3]);
	} else {
		sprintf(tmp_buf, "%s@%08x%08x",
			dp->name, regs[0], regs[1]);
	}
}

static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
{
	struct device_node *parent = dp->parent;

	if (parent != NULL) {
		if (!strcmp(parent->type, "pci") ||
		    !strcmp(parent->type, "pciex"))
			return pci_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "sbus"))
			return sbus_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "upa"))
			return upa_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "ebus"))
			return ebus_path_component(dp, tmp_buf);
		if (!strcmp(parent->name, "usb") ||
		    !strcmp(parent->name, "hub"))
			return usb_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "i2c"))
			return i2c_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "firewire"))
			return ieee1394_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "virtual-devices"))
			return vdev_path_component(dp, tmp_buf);

		/* "isa" is handled with platform naming */
	}

	/* Use platform naming convention.  */
	if (tlb_type == hypervisor)
		return sun4v_path_component(dp, tmp_buf);
	else
		return sun4u_path_component(dp, tmp_buf);
}

static char * __init build_path_component(struct device_node *dp)
{
	char tmp_buf[64], *n;

	tmp_buf[0] = '\0';
	__build_path_component(dp, tmp_buf);
	if (tmp_buf[0] == '\0')
		strcpy(tmp_buf, dp->name);

	n = prom_early_alloc(strlen(tmp_buf) + 1);
	strcpy(n, tmp_buf);

	return n;
}

static char * __init build_full_name(struct device_node *dp)
{
	int len, ourlen, plen;
	char *n;

	plen = strlen(dp->parent->full_name);
	ourlen = strlen(dp->path_component_name);
	len = ourlen + plen + 2;

	n = prom_early_alloc(len);
	strcpy(n, dp->parent->full_name);
	if (!is_root_node(dp->parent)) {
		strcpy(n + plen, "/");
		plen++;
	}
	strcpy(n + plen, dp->path_component_name);

	return n;
}

static unsigned int unique_id;

static struct property * __init build_one_prop(phandle node, char *prev, char *special_name, void *special_val, int special_len)
{
	static struct property *tmp = NULL;
	struct property *p;

	if (tmp) {
		p = tmp;
		memset(p, 0, sizeof(*p) + 32);
		tmp = NULL;
	} else {
		p = prom_early_alloc(sizeof(struct property) + 32);
		p->unique_id = unique_id++;
	}

	p->name = (char *) (p + 1);
	if (special_name) {
		strcpy(p->name, special_name);
		p->length = special_len;
		p->value = prom_early_alloc(special_len);
		memcpy(p->value, special_val, special_len);
	} else {
		if (prev == NULL) {
			prom_firstprop(node, p->name);
		} else {
			prom_nextprop(node, prev, p->name);
		}
		if (strlen(p->name) == 0) {
			tmp = p;
			return NULL;
		}
		p->length = prom_getproplen(node, p->name);
		if (p->length <= 0) {
			p->length = 0;
		} else {
			p->value = prom_early_alloc(p->length + 1);
			prom_getproperty(node, p->name, p->value, p->length);
			((unsigned char *)p->value)[p->length] = '\0';
		}
	}
	return p;
}

static struct property * __init build_prop_list(phandle node)
{
	struct property *head, *tail;

	head = tail = build_one_prop(node, NULL,
				     ".node", &node, sizeof(node));

	tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
	tail = tail->next;
	while(tail) {
		tail->next = build_one_prop(node, tail->name,
					    NULL, NULL, 0);
		tail = tail->next;
	}

	return head;
}

static char * __init get_one_property(phandle node, const char *name)
{
	char *buf = "<NULL>";
	int len;

	len = prom_getproplen(node, name);
	if (len > 0) {
		buf = prom_early_alloc(len);
		prom_getproperty(node, name, buf, len);
	}

	return buf;
}

static struct device_node * __init create_node(phandle node)
{
	struct device_node *dp;

	if (!node)
		return NULL;

	dp = prom_early_alloc(sizeof(*dp));
	dp->unique_id = unique_id++;

	kref_init(&dp->kref);

	dp->name = get_one_property(node, "name");
	dp->type = get_one_property(node, "device_type");
	dp->node = node;

	dp->properties = build_prop_list(node);

	irq_trans_init(dp);

	return dp;
}

static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
{
	struct device_node *dp;

	dp = create_node(node);
	if (dp) {
		*(*nextp) = dp;
		*nextp = &dp->allnext;

		dp->parent = parent;
		dp->path_component_name = build_path_component(dp);
		dp->full_name = build_full_name(dp);

		dp->child = build_tree(dp, prom_getchild(node), nextp);

		dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
	}

	return dp;
}

void __init prom_build_devicetree(void)
{
	struct device_node **nextp;

	allnodes = create_node(prom_root_node);
	allnodes->path_component_name = "";
	allnodes->full_name = "/";

	nextp = &allnodes->allnext;
	allnodes->child = build_tree(allnodes,
				     prom_getchild(allnodes->node),
				     &nextp);
	printk("PROM: Built device tree with %u bytes of memory.\n",
	       prom_early_allocated);
}