summaryrefslogtreecommitdiff
path: root/common/fdt_support.c
blob: 812eca8173ba91c2f14cc698600ba1d069a07cf1 (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
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2007
 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
 *
 * Copyright 2010-2011 Freescale Semiconductor, Inc.
 */

#include <common.h>
#include <inttypes.h>
#include <stdio_dev.h>
#include <linux/ctype.h>
#include <linux/types.h>
#include <asm/global_data.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
#include <exports.h>
#include <fdtdec.h>

/**
 * fdt_getprop_u32_default_node - Return a node's property or a default
 *
 * @fdt: ptr to device tree
 * @off: offset of node
 * @cell: cell offset in property
 * @prop: property name
 * @dflt: default value if the property isn't found
 *
 * Convenience function to return a node's property or a default value if
 * the property doesn't exist.
 */
u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
				const char *prop, const u32 dflt)
{
	const fdt32_t *val;
	int len;

	val = fdt_getprop(fdt, off, prop, &len);

	/* Check if property exists */
	if (!val)
		return dflt;

	/* Check if property is long enough */
	if (len < ((cell + 1) * sizeof(uint32_t)))
		return dflt;

	return fdt32_to_cpu(*val);
}

/**
 * fdt_getprop_u32_default - Find a node and return it's property or a default
 *
 * @fdt: ptr to device tree
 * @path: path of node
 * @prop: property name
 * @dflt: default value if the property isn't found
 *
 * Convenience function to find a node and return it's property or a
 * default value if it doesn't exist.
 */
u32 fdt_getprop_u32_default(const void *fdt, const char *path,
				const char *prop, const u32 dflt)
{
	int off;

	off = fdt_path_offset(fdt, path);
	if (off < 0)
		return dflt;

	return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
}

/**
 * fdt_find_and_setprop: Find a node and set it's property
 *
 * @fdt: ptr to device tree
 * @node: path of node
 * @prop: property name
 * @val: ptr to new value
 * @len: length of new property value
 * @create: flag to create the property if it doesn't exist
 *
 * Convenience function to directly set a property given the path to the node.
 */
int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
			 const void *val, int len, int create)
{
	int nodeoff = fdt_path_offset(fdt, node);

	if (nodeoff < 0)
		return nodeoff;

	if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
		return 0; /* create flag not set; so exit quietly */

	return fdt_setprop(fdt, nodeoff, prop, val, len);
}

/**
 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
 *
 * @fdt: pointer to the device tree blob
 * @parentoffset: structure block offset of a node
 * @name: name of the subnode to locate
 *
 * fdt_subnode_offset() finds a subnode of the node with a given name.
 * If the subnode does not exist, it will be created.
 */
int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
{
	int offset;

	offset = fdt_subnode_offset(fdt, parentoffset, name);

	if (offset == -FDT_ERR_NOTFOUND)
		offset = fdt_add_subnode(fdt, parentoffset, name);

	if (offset < 0)
		printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));

	return offset;
}

/* rename to CONFIG_OF_STDOUT_PATH ? */
#if defined(OF_STDOUT_PATH)
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
	return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
			      OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
}
#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
	int err;
	int aliasoff;
	char sername[9] = { 0 };
	const void *path;
	int len;
	char tmp[256]; /* long enough */

	sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);

	aliasoff = fdt_path_offset(fdt, "/aliases");
	if (aliasoff < 0) {
		err = aliasoff;
		goto noalias;
	}

	path = fdt_getprop(fdt, aliasoff, sername, &len);
	if (!path) {
		err = len;
		goto noalias;
	}

	/* fdt_setprop may break "path" so we copy it to tmp buffer */
	memcpy(tmp, path, len);

	err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
	if (err < 0)
		printf("WARNING: could not set linux,stdout-path %s.\n",
		       fdt_strerror(err));

	return err;

noalias:
	printf("WARNING: %s: could not read %s alias: %s\n",
	       __func__, sername, fdt_strerror(err));

	return 0;
}
#else
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
	return 0;
}
#endif

static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
				  uint64_t val, int is_u64)
{
	if (is_u64)
		return fdt_setprop_u64(fdt, nodeoffset, name, val);
	else
		return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
}

int fdt_root(void *fdt)
{
	char *serial;
	int err;

	err = fdt_check_header(fdt);
	if (err < 0) {
		printf("fdt_root: %s\n", fdt_strerror(err));
		return err;
	}

	serial = env_get("serial#");
	if (serial) {
		err = fdt_setprop(fdt, 0, "serial-number", serial,
				  strlen(serial) + 1);

		if (err < 0) {
			printf("WARNING: could not set serial-number %s.\n",
			       fdt_strerror(err));
			return err;
		}
	}

	return 0;
}

int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
{
	int   nodeoffset;
	int   err, j, total;
	int is_u64;
	uint64_t addr, size;

	/* just return if the size of initrd is zero */
	if (initrd_start == initrd_end)
		return 0;

	/* find or create "/chosen" node. */
	nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
	if (nodeoffset < 0)
		return nodeoffset;

	total = fdt_num_mem_rsv(fdt);

	/*
	 * Look for an existing entry and update it.  If we don't find
	 * the entry, we will j be the next available slot.
	 */
	for (j = 0; j < total; j++) {
		err = fdt_get_mem_rsv(fdt, j, &addr, &size);
		if (addr == initrd_start) {
			fdt_del_mem_rsv(fdt, j);
			break;
		}
	}

	err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
	if (err < 0) {
		printf("fdt_initrd: %s\n", fdt_strerror(err));
		return err;
	}

	is_u64 = (fdt_address_cells(fdt, 0) == 2);

	err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
			      (uint64_t)initrd_start, is_u64);

	if (err < 0) {
		printf("WARNING: could not set linux,initrd-start %s.\n",
		       fdt_strerror(err));
		return err;
	}

	err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
			      (uint64_t)initrd_end, is_u64);

	if (err < 0) {
		printf("WARNING: could not set linux,initrd-end %s.\n",
		       fdt_strerror(err));

		return err;
	}

	return 0;
}

int fdt_chosen(void *fdt)
{
	int   nodeoffset;
	int   err;
	char  *str;		/* used to set string properties */

	err = fdt_check_header(fdt);
	if (err < 0) {
		printf("fdt_chosen: %s\n", fdt_strerror(err));
		return err;
	}

	/* find or create "/chosen" node. */
	nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
	if (nodeoffset < 0)
		return nodeoffset;

	str = env_get("bootargs");
	if (str) {
		err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
				  strlen(str) + 1);
		if (err < 0) {
			printf("WARNING: could not set bootargs %s.\n",
			       fdt_strerror(err));
			return err;
		}
	}

	return fdt_fixup_stdout(fdt, nodeoffset);
}

void do_fixup_by_path(void *fdt, const char *path, const char *prop,
		      const void *val, int len, int create)
{
#if defined(DEBUG)
	int i;
	debug("Updating property '%s/%s' = ", path, prop);
	for (i = 0; i < len; i++)
		debug(" %.2x", *(u8*)(val+i));
	debug("\n");
#endif
	int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
	if (rc)
		printf("Unable to update property %s:%s, err=%s\n",
			path, prop, fdt_strerror(rc));
}

void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
			  u32 val, int create)
{
	fdt32_t tmp = cpu_to_fdt32(val);
	do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
}

void do_fixup_by_prop(void *fdt,
		      const char *pname, const void *pval, int plen,
		      const char *prop, const void *val, int len,
		      int create)
{
	int off;
#if defined(DEBUG)
	int i;
	debug("Updating property '%s' = ", prop);
	for (i = 0; i < len; i++)
		debug(" %.2x", *(u8*)(val+i));
	debug("\n");
#endif
	off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
	while (off != -FDT_ERR_NOTFOUND) {
		if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
			fdt_setprop(fdt, off, prop, val, len);
		off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
	}
}

void do_fixup_by_prop_u32(void *fdt,
			  const char *pname, const void *pval, int plen,
			  const char *prop, u32 val, int create)
{
	fdt32_t tmp = cpu_to_fdt32(val);
	do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
}

void do_fixup_by_compat(void *fdt, const char *compat,
			const char *prop, const void *val, int len, int create)
{
	int off = -1;
#if defined(DEBUG)
	int i;
	debug("Updating property '%s' = ", prop);
	for (i = 0; i < len; i++)
		debug(" %.2x", *(u8*)(val+i));
	debug("\n");
#endif
	off = fdt_node_offset_by_compatible(fdt, -1, compat);
	while (off != -FDT_ERR_NOTFOUND) {
		if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
			fdt_setprop(fdt, off, prop, val, len);
		off = fdt_node_offset_by_compatible(fdt, off, compat);
	}
}

void do_fixup_by_compat_u32(void *fdt, const char *compat,
			    const char *prop, u32 val, int create)
{
	fdt32_t tmp = cpu_to_fdt32(val);
	do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
}

#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
/*
 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
 */
static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
			int n)
{
	int i;
	int address_cells = fdt_address_cells(fdt, 0);
	int size_cells = fdt_size_cells(fdt, 0);
	char *p = buf;

	for (i = 0; i < n; i++) {
		if (address_cells == 2)
			*(fdt64_t *)p = cpu_to_fdt64(address[i]);
		else
			*(fdt32_t *)p = cpu_to_fdt32(address[i]);
		p += 4 * address_cells;

		if (size_cells == 2)
			*(fdt64_t *)p = cpu_to_fdt64(size[i]);
		else
			*(fdt32_t *)p = cpu_to_fdt32(size[i]);
		p += 4 * size_cells;
	}

	return p - (char *)buf;
}

#ifdef CONFIG_NR_DRAM_BANKS
#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
#else
#define MEMORY_BANKS_MAX 4
#endif
int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
{
	int err, nodeoffset;
	int len, i;
	u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */

	if (banks > MEMORY_BANKS_MAX) {
		printf("%s: num banks %d exceeds hardcoded limit %d."
		       " Recompile with higher MEMORY_BANKS_MAX?\n",
		       __FUNCTION__, banks, MEMORY_BANKS_MAX);
		return -1;
	}

	err = fdt_check_header(blob);
	if (err < 0) {
		printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
		return err;
	}

	/* find or create "/memory" node. */
	nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
	if (nodeoffset < 0)
			return nodeoffset;

	err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
			sizeof("memory"));
	if (err < 0) {
		printf("WARNING: could not set %s %s.\n", "device_type",
				fdt_strerror(err));
		return err;
	}

	for (i = 0; i < banks; i++) {
		if (start[i] == 0 && size[i] == 0)
			break;
	}

	banks = i;

	if (!banks)
		return 0;

	for (i = 0; i < banks; i++)
		if (start[i] == 0 && size[i] == 0)
			break;

	banks = i;

	len = fdt_pack_reg(blob, tmp, start, size, banks);

	err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
	if (err < 0) {
		printf("WARNING: could not set %s %s.\n",
				"reg", fdt_strerror(err));
		return err;
	}
	return 0;
}
#endif

int fdt_fixup_memory(void *blob, u64 start, u64 size)
{
	return fdt_fixup_memory_banks(blob, &start, &size, 1);
}

void fdt_fixup_ethernet(void *fdt)
{
	int i = 0, j, prop;
	char *tmp, *end;
	char mac[16];
	const char *path;
	unsigned char mac_addr[ARP_HLEN];
	int offset;
#ifdef FDT_SEQ_MACADDR_FROM_ENV
	int nodeoff;
	const struct fdt_property *fdt_prop;
#endif

	if (fdt_path_offset(fdt, "/aliases") < 0)
		return;

	/* Cycle through all aliases */
	for (prop = 0; ; prop++) {
		const char *name;

		/* FDT might have been edited, recompute the offset */
		offset = fdt_first_property_offset(fdt,
			fdt_path_offset(fdt, "/aliases"));
		/* Select property number 'prop' */
		for (j = 0; j < prop; j++)
			offset = fdt_next_property_offset(fdt, offset);

		if (offset < 0)
			break;

		path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
		if (!strncmp(name, "ethernet", 8)) {
			/* Treat plain "ethernet" same as "ethernet0". */
			if (!strcmp(name, "ethernet")
#ifdef FDT_SEQ_MACADDR_FROM_ENV
			 || !strcmp(name, "ethernet0")
#endif
			)
				i = 0;
#ifndef FDT_SEQ_MACADDR_FROM_ENV
			else
				i = trailing_strtol(name);
#endif
			if (i != -1) {
				if (i == 0)
					strcpy(mac, "ethaddr");
				else
					sprintf(mac, "eth%daddr", i);
			} else {
				continue;
			}
#ifdef FDT_SEQ_MACADDR_FROM_ENV
			nodeoff = fdt_path_offset(fdt, path);
			fdt_prop = fdt_get_property(fdt, nodeoff, "status",
						    NULL);
			if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
				continue;
			i++;
#endif
			tmp = env_get(mac);
			if (!tmp)
				continue;

			for (j = 0; j < 6; j++) {
				mac_addr[j] = tmp ?
					      simple_strtoul(tmp, &end, 16) : 0;
				if (tmp)
					tmp = (*end) ? end + 1 : end;
			}

			do_fixup_by_path(fdt, path, "mac-address",
					 &mac_addr, 6, 0);
			do_fixup_by_path(fdt, path, "local-mac-address",
					 &mac_addr, 6, 1);
		}
	}
}

int fdt_record_loadable(void *blob, u32 index, const char *name,
			uintptr_t load_addr, u32 size, uintptr_t entry_point,
			const char *type, const char *os)
{
	int err, node;

	err = fdt_check_header(blob);
	if (err < 0) {
		printf("%s: %s\n", __func__, fdt_strerror(err));
		return err;
	}

	/* find or create "/fit-images" node */
	node = fdt_find_or_add_subnode(blob, 0, "fit-images");
	if (node < 0)
		return node;

	/* find or create "/fit-images/<name>" node */
	node = fdt_find_or_add_subnode(blob, node, name);
	if (node < 0)
		return node;

	/*
	 * We record these as 32bit entities, possibly truncating addresses.
	 * However, spl_fit.c is not 64bit safe either: i.e. we should not
	 * have an issue here.
	 */
	fdt_setprop_u32(blob, node, "load-addr", load_addr);
	if (entry_point != -1)
		fdt_setprop_u32(blob, node, "entry-point", entry_point);
	fdt_setprop_u32(blob, node, "size", size);
	if (type)
		fdt_setprop_string(blob, node, "type", type);
	if (os)
		fdt_setprop_string(blob, node, "os", os);

	return node;
}

/* Resize the fdt to its actual size + a bit of padding */
int fdt_shrink_to_minimum(void *blob, uint extrasize)
{
	int i;
	uint64_t addr, size;
	int total, ret;
	uint actualsize;

	if (!blob)
		return 0;

	total = fdt_num_mem_rsv(blob);
	for (i = 0; i < total; i++) {
		fdt_get_mem_rsv(blob, i, &addr, &size);
		if (addr == (uintptr_t)blob) {
			fdt_del_mem_rsv(blob, i);
			break;
		}
	}

	/*
	 * Calculate the actual size of the fdt
	 * plus the size needed for 5 fdt_add_mem_rsv, one
	 * for the fdt itself and 4 for a possible initrd
	 * ((initrd-start + initrd-end) * 2 (name & value))
	 */
	actualsize = fdt_off_dt_strings(blob) +
		fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);

	actualsize += extrasize;
	/* Make it so the fdt ends on a page boundary */
	actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
	actualsize = actualsize - ((uintptr_t)blob & 0xfff);

	/* Change the fdt header to reflect the correct size */
	fdt_set_totalsize(blob, actualsize);

	/* Add the new reservation */
	ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
	if (ret < 0)
		return ret;

	return actualsize;
}

#ifdef CONFIG_PCI
#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4

#define FDT_PCI_PREFETCH	(0x40000000)
#define FDT_PCI_MEM32		(0x02000000)
#define FDT_PCI_IO		(0x01000000)
#define FDT_PCI_MEM64		(0x03000000)

int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {

	int addrcell, sizecell, len, r;
	u32 *dma_range;
	/* sized based on pci addr cells, size-cells, & address-cells */
	u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];

	addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
	sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);

	dma_range = &dma_ranges[0];
	for (r = 0; r < hose->region_count; r++) {
		u64 bus_start, phys_start, size;

		/* skip if !PCI_REGION_SYS_MEMORY */
		if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
			continue;

		bus_start = (u64)hose->regions[r].bus_start;
		phys_start = (u64)hose->regions[r].phys_start;
		size = (u64)hose->regions[r].size;

		dma_range[0] = 0;
		if (size >= 0x100000000ull)
			dma_range[0] |= FDT_PCI_MEM64;
		else
			dma_range[0] |= FDT_PCI_MEM32;
		if (hose->regions[r].flags & PCI_REGION_PREFETCH)
			dma_range[0] |= FDT_PCI_PREFETCH;
#ifdef CONFIG_SYS_PCI_64BIT
		dma_range[1] = bus_start >> 32;
#else
		dma_range[1] = 0;
#endif
		dma_range[2] = bus_start & 0xffffffff;

		if (addrcell == 2) {
			dma_range[3] = phys_start >> 32;
			dma_range[4] = phys_start & 0xffffffff;
		} else {
			dma_range[3] = phys_start & 0xffffffff;
		}

		if (sizecell == 2) {
			dma_range[3 + addrcell + 0] = size >> 32;
			dma_range[3 + addrcell + 1] = size & 0xffffffff;
		} else {
			dma_range[3 + addrcell + 0] = size & 0xffffffff;
		}

		dma_range += (3 + addrcell + sizecell);
	}

	len = dma_range - &dma_ranges[0];
	if (len)
		fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);

	return 0;
}
#endif

int fdt_increase_size(void *fdt, int add_len)
{
	int newlen;

	newlen = fdt_totalsize(fdt) + add_len;

	/* Open in place with a new len */
	return fdt_open_into(fdt, fdt, newlen);
}

#ifdef CONFIG_FDT_FIXUP_PARTITIONS
#include <jffs2/load_kernel.h>
#include <mtd_node.h>

struct reg_cell {
	unsigned int r0;
	unsigned int r1;
};

int fdt_del_subnodes(const void *blob, int parent_offset)
{
	int off, ndepth;
	int ret;

	for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
	     (off >= 0) && (ndepth > 0);
	     off = fdt_next_node(blob, off, &ndepth)) {
		if (ndepth == 1) {
			debug("delete %s: offset: %x\n",
				fdt_get_name(blob, off, 0), off);
			ret = fdt_del_node((void *)blob, off);
			if (ret < 0) {
				printf("Can't delete node: %s\n",
					fdt_strerror(ret));
				return ret;
			} else {
				ndepth = 0;
				off = parent_offset;
			}
		}
	}
	return 0;
}

int fdt_del_partitions(void *blob, int parent_offset)
{
	const void *prop;
	int ndepth = 0;
	int off;
	int ret;

	off = fdt_next_node(blob, parent_offset, &ndepth);
	if (off > 0 && ndepth == 1) {
		prop = fdt_getprop(blob, off, "label", NULL);
		if (prop == NULL) {
			/*
			 * Could not find label property, nand {}; node?
			 * Check subnode, delete partitions there if any.
			 */
			return fdt_del_partitions(blob, off);
		} else {
			ret = fdt_del_subnodes(blob, parent_offset);
			if (ret < 0) {
				printf("Can't remove subnodes: %s\n",
					fdt_strerror(ret));
				return ret;
			}
		}
	}
	return 0;
}

int fdt_node_set_part_info(void *blob, int parent_offset,
			   struct mtd_device *dev)
{
	struct list_head *pentry;
	struct part_info *part;
	struct reg_cell cell;
	int off, ndepth = 0;
	int part_num, ret;
	char buf[64];

	ret = fdt_del_partitions(blob, parent_offset);
	if (ret < 0)
		return ret;

	/*
	 * Check if it is nand {}; subnode, adjust
	 * the offset in this case
	 */
	off = fdt_next_node(blob, parent_offset, &ndepth);
	if (off > 0 && ndepth == 1)
		parent_offset = off;

	part_num = 0;
	list_for_each_prev(pentry, &dev->parts) {
		int newoff;

		part = list_entry(pentry, struct part_info, link);

		debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
			part_num, part->name, part->size,
			part->offset, part->mask_flags);

		sprintf(buf, "partition@%llx", part->offset);
add_sub:
		ret = fdt_add_subnode(blob, parent_offset, buf);
		if (ret == -FDT_ERR_NOSPACE) {
			ret = fdt_increase_size(blob, 512);
			if (!ret)
				goto add_sub;
			else
				goto err_size;
		} else if (ret < 0) {
			printf("Can't add partition node: %s\n",
				fdt_strerror(ret));
			return ret;
		}
		newoff = ret;

		/* Check MTD_WRITEABLE_CMD flag */
		if (part->mask_flags & 1) {
add_ro:
			ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
			if (ret == -FDT_ERR_NOSPACE) {
				ret = fdt_increase_size(blob, 512);
				if (!ret)
					goto add_ro;
				else
					goto err_size;
			} else if (ret < 0)
				goto err_prop;
		}

		cell.r0 = cpu_to_fdt32(part->offset);
		cell.r1 = cpu_to_fdt32(part->size);
add_reg:
		ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
		if (ret == -FDT_ERR_NOSPACE) {
			ret = fdt_increase_size(blob, 512);
			if (!ret)
				goto add_reg;
			else
				goto err_size;
		} else if (ret < 0)
			goto err_prop;

add_label:
		ret = fdt_setprop_string(blob, newoff, "label", part->name);
		if (ret == -FDT_ERR_NOSPACE) {
			ret = fdt_increase_size(blob, 512);
			if (!ret)
				goto add_label;
			else
				goto err_size;
		} else if (ret < 0)
			goto err_prop;

		part_num++;
	}
	return 0;
err_size:
	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
	return ret;
err_prop:
	printf("Can't add property: %s\n", fdt_strerror(ret));
	return ret;
}

/*
 * Update partitions in nor/nand nodes using info from
 * mtdparts environment variable. The nodes to update are
 * specified by node_info structure which contains mtd device
 * type and compatible string: E. g. the board code in
 * ft_board_setup() could use:
 *
 *	struct node_info nodes[] = {
 *		{ "fsl,mpc5121-nfc",    MTD_DEV_TYPE_NAND, },
 *		{ "cfi-flash",          MTD_DEV_TYPE_NOR,  },
 *	};
 *
 *	fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
 */
void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
{
	struct node_info *ni = node_info;
	struct mtd_device *dev;
	int i, idx;
	int noff;

	if (mtdparts_init() != 0)
		return;

	for (i = 0; i < node_info_size; i++) {
		idx = 0;
		noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
		while (noff != -FDT_ERR_NOTFOUND) {
			debug("%s: %s, mtd dev type %d\n",
				fdt_get_name(blob, noff, 0),
				ni[i].compat, ni[i].type);
			dev = device_find(ni[i].type, idx++);
			if (dev) {
				if (fdt_node_set_part_info(blob, noff, dev))
					return; /* return on error */
			}

			/* Jump to next flash node */
			noff = fdt_node_offset_by_compatible(blob, noff,
							     ni[i].compat);
		}
	}
}
#endif

void fdt_del_node_and_alias(void *blob, const char *alias)
{
	int off = fdt_path_offset(blob, alias);

	if (off < 0)
		return;

	fdt_del_node(blob, off);

	off = fdt_path_offset(blob, "/aliases");
	fdt_delprop(blob, off, alias);
}

/* Max address size we deal with */
#define OF_MAX_ADDR_CELLS	4
#define OF_BAD_ADDR	FDT_ADDR_T_NONE
#define OF_CHECK_COUNTS(na, ns)	((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
			(ns) > 0)

/* Debug utility */
#ifdef DEBUG
static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
{
	printf("%s", s);
	while(na--)
		printf(" %08x", *(addr++));
	printf("\n");
}
#else
static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
#endif

/**
 * struct of_bus - Callbacks for bus specific translators
 * @name:	A string used to identify this bus in debug output.
 * @addresses:	The name of the DT property from which addresses are
 *		to be read, typically "reg".
 * @match:	Return non-zero if the node whose parent is at
 *		parentoffset in the FDT blob corresponds to a bus
 *		of this type, otherwise return zero. If NULL a match
 *		is assumed.
 * @count_cells:Count how many cells (be32 values) a node whose parent
 *		is at parentoffset in the FDT blob will require to
 *		represent its address (written to *addrc) & size
 *		(written to *sizec).
 * @map:	Map the address addr from the address space of this
 *		bus to that of its parent, making use of the ranges
 *		read from DT to an array at range. na and ns are the
 *		number of cells (be32 values) used to hold and address
 *		or size, respectively, for this bus. pna is the number
 *		of cells used to hold an address for the parent bus.
 *		Returns the address in the address space of the parent
 *		bus.
 * @translate:	Update the value of the address cells at addr within an
 *		FDT by adding offset to it. na specifies the number of
 *		cells used to hold the address being translated. Returns
 *		zero on success, non-zero on error.
 *
 * Each bus type will include a struct of_bus in the of_busses array,
 * providing implementations of some or all of the functions used to
 * match the bus & handle address translation for its children.
 */
struct of_bus {
	const char	*name;
	const char	*addresses;
	int		(*match)(const void *blob, int parentoffset);
	void		(*count_cells)(const void *blob, int parentoffset,
				int *addrc, int *sizec);
	u64		(*map)(fdt32_t *addr, const fdt32_t *range,
				int na, int ns, int pna);
	int		(*translate)(fdt32_t *addr, u64 offset, int na);
};

/* Default translator (generic bus) */
void fdt_support_default_count_cells(const void *blob, int parentoffset,
					int *addrc, int *sizec)
{
	const fdt32_t *prop;

	if (addrc)
		*addrc = fdt_address_cells(blob, parentoffset);

	if (sizec) {
		prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
		if (prop)
			*sizec = be32_to_cpup(prop);
		else
			*sizec = 1;
	}
}

static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
		int na, int ns, int pna)
{
	u64 cp, s, da;

	cp = fdt_read_number(range, na);
	s  = fdt_read_number(range + na + pna, ns);
	da = fdt_read_number(addr, na);

	debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
	      ", da=%" PRIu64 "\n", cp, s, da);

	if (da < cp || da >= (cp + s))
		return OF_BAD_ADDR;
	return da - cp;
}

static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
{
	u64 a = fdt_read_number(addr, na);
	memset(addr, 0, na * 4);
	a += offset;
	if (na > 1)
		addr[na - 2] = cpu_to_fdt32(a >> 32);
	addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);

	return 0;
}

#ifdef CONFIG_OF_ISA_BUS

/* ISA bus translator */
static int of_bus_isa_match(const void *blob, int parentoffset)
{
	const char *name;

	name = fdt_get_name(blob, parentoffset, NULL);
	if (!name)
		return 0;

	return !strcmp(name, "isa");
}

static void of_bus_isa_count_cells(const void *blob, int parentoffset,
				   int *addrc, int *sizec)
{
	if (addrc)
		*addrc = 2;
	if (sizec)
		*sizec = 1;
}

static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
			  int na, int ns, int pna)
{
	u64 cp, s, da;

	/* Check address type match */
	if ((addr[0] ^ range[0]) & cpu_to_be32(1))
		return OF_BAD_ADDR;

	cp = fdt_read_number(range + 1, na - 1);
	s  = fdt_read_number(range + na + pna, ns);
	da = fdt_read_number(addr + 1, na - 1);

	debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64
	      ", da=%" PRIu64 "\n", cp, s, da);

	if (da < cp || da >= (cp + s))
		return OF_BAD_ADDR;
	return da - cp;
}

static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
{
	return of_bus_default_translate(addr + 1, offset, na - 1);
}

#endif /* CONFIG_OF_ISA_BUS */

/* Array of bus specific translators */
static struct of_bus of_busses[] = {
#ifdef CONFIG_OF_ISA_BUS
	/* ISA */
	{
		.name = "isa",
		.addresses = "reg",
		.match = of_bus_isa_match,
		.count_cells = of_bus_isa_count_cells,
		.map = of_bus_isa_map,
		.translate = of_bus_isa_translate,
	},
#endif /* CONFIG_OF_ISA_BUS */
	/* Default */
	{
		.name = "default",
		.addresses = "reg",
		.count_cells = fdt_support_default_count_cells,
		.map = of_bus_default_map,
		.translate = of_bus_default_translate,
	},
};

static struct of_bus *of_match_bus(const void *blob, int parentoffset)
{
	struct of_bus *bus;

	if (ARRAY_SIZE(of_busses) == 1)
		return of_busses;

	for (bus = of_busses; bus; bus++) {
		if (!bus->match || bus->match(blob, parentoffset))
			return bus;
	}

	/*
	 * We should always have matched the default bus at least, since
	 * it has a NULL match field. If we didn't then it somehow isn't
	 * in the of_busses array or something equally catastrophic has
	 * gone wrong.
	 */
	assert(0);
	return NULL;
}

static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
			    struct of_bus *pbus, fdt32_t *addr,
			    int na, int ns, int pna, const char *rprop)
{
	const fdt32_t *ranges;
	int rlen;
	int rone;
	u64 offset = OF_BAD_ADDR;

	/* Normally, an absence of a "ranges" property means we are
	 * crossing a non-translatable boundary, and thus the addresses
	 * below the current not cannot be converted to CPU physical ones.
	 * Unfortunately, while this is very clear in the spec, it's not
	 * what Apple understood, and they do have things like /uni-n or
	 * /ht nodes with no "ranges" property and a lot of perfectly
	 * useable mapped devices below them. Thus we treat the absence of
	 * "ranges" as equivalent to an empty "ranges" property which means
	 * a 1:1 translation at that level. It's up to the caller not to try
	 * to translate addresses that aren't supposed to be translated in
	 * the first place. --BenH.
	 */
	ranges = fdt_getprop(blob, parent, rprop, &rlen);
	if (ranges == NULL || rlen == 0) {
		offset = fdt_read_number(addr, na);
		memset(addr, 0, pna * 4);
		debug("OF: no ranges, 1:1 translation\n");
		goto finish;
	}

	debug("OF: walking ranges...\n");

	/* Now walk through the ranges */
	rlen /= 4;
	rone = na + pna + ns;
	for (; rlen >= rone; rlen -= rone, ranges += rone) {
		offset = bus->map(addr, ranges, na, ns, pna);
		if (offset != OF_BAD_ADDR)
			break;
	}
	if (offset == OF_BAD_ADDR) {
		debug("OF: not found !\n");
		return 1;
	}
	memcpy(addr, ranges + na, 4 * pna);

 finish:
	of_dump_addr("OF: parent translation for:", addr, pna);
	debug("OF: with offset: %" PRIu64 "\n", offset);

	/* Translate it into parent bus space */
	return pbus->translate(addr, offset, pna);
}

/*
 * Translate an address from the device-tree into a CPU physical address,
 * this walks up the tree and applies the various bus mappings on the
 * way.
 *
 * Note: We consider that crossing any level with #size-cells == 0 to mean
 * that translation is impossible (that is we are not dealing with a value
 * that can be mapped to a cpu physical address). This is not really specified
 * that way, but this is traditionally the way IBM at least do things
 */
static u64 __of_translate_address(const void *blob, int node_offset,
				  const fdt32_t *in_addr, const char *rprop)
{
	int parent;
	struct of_bus *bus, *pbus;
	fdt32_t addr[OF_MAX_ADDR_CELLS];
	int na, ns, pna, pns;
	u64 result = OF_BAD_ADDR;

	debug("OF: ** translation for device %s **\n",
		fdt_get_name(blob, node_offset, NULL));

	/* Get parent & match bus type */
	parent = fdt_parent_offset(blob, node_offset);
	if (parent < 0)
		goto bail;
	bus = of_match_bus(blob, parent);

	/* Cound address cells & copy address locally */
	bus->count_cells(blob, parent, &na, &ns);
	if (!OF_CHECK_COUNTS(na, ns)) {
		printf("%s: Bad cell count for %s\n", __FUNCTION__,
		       fdt_get_name(blob, node_offset, NULL));
		goto bail;
	}
	memcpy(addr, in_addr, na * 4);

	debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
	    bus->name, na, ns, fdt_get_name(blob, parent, NULL));
	of_dump_addr("OF: translating address:", addr, na);

	/* Translate */
	for (;;) {
		/* Switch to parent bus */
		node_offset = parent;
		parent = fdt_parent_offset(blob, node_offset);

		/* If root, we have finished */
		if (parent < 0) {
			debug("OF: reached root node\n");
			result = fdt_read_number(addr, na);
			break;
		}

		/* Get new parent bus and counts */
		pbus = of_match_bus(blob, parent);
		pbus->count_cells(blob, parent, &pna, &pns);
		if (!OF_CHECK_COUNTS(pna, pns)) {
			printf("%s: Bad cell count for %s\n", __FUNCTION__,
				fdt_get_name(blob, node_offset, NULL));
			break;
		}

		debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
		    pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));

		/* Apply bus translation */
		if (of_translate_one(blob, node_offset, bus, pbus,
					addr, na, ns, pna, rprop))
			break;

		/* Complete the move up one level */
		na = pna;
		ns = pns;
		bus = pbus;

		of_dump_addr("OF: one level translation:", addr, na);
	}
 bail:

	return result;
}

u64 fdt_translate_address(const void *blob, int node_offset,
			  const fdt32_t *in_addr)
{
	return __of_translate_address(blob, node_offset, in_addr, "ranges");
}

/**
 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
 * who's reg property matches a physical cpu address
 *
 * @blob: ptr to device tree
 * @compat: compatiable string to match
 * @compat_off: property name
 *
 */
int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
					phys_addr_t compat_off)
{
	int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
	while (off != -FDT_ERR_NOTFOUND) {
		const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
		if (reg) {
			if (compat_off == fdt_translate_address(blob, off, reg))
				return off;
		}
		off = fdt_node_offset_by_compatible(blob, off, compat);
	}

	return -FDT_ERR_NOTFOUND;
}

/**
 * fdt_alloc_phandle: Return next free phandle value
 *
 * @blob: ptr to device tree
 */
int fdt_alloc_phandle(void *blob)
{
	int offset;
	uint32_t phandle = 0;

	for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
	     offset = fdt_next_node(blob, offset, NULL)) {
		phandle = max(phandle, fdt_get_phandle(blob, offset));
	}

	return phandle + 1;
}

/*
 * fdt_set_phandle: Create a phandle property for the given node
 *
 * @fdt: ptr to device tree
 * @nodeoffset: node to update
 * @phandle: phandle value to set (must be unique)
 */
int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
{
	int ret;

#ifdef DEBUG
	int off = fdt_node_offset_by_phandle(fdt, phandle);

	if ((off >= 0) && (off != nodeoffset)) {
		char buf[64];

		fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
		printf("Trying to update node %s with phandle %u ",
		       buf, phandle);

		fdt_get_path(fdt, off, buf, sizeof(buf));
		printf("that already exists in node %s.\n", buf);
		return -FDT_ERR_BADPHANDLE;
	}
#endif

	ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
	if (ret < 0)
		return ret;

	/*
	 * For now, also set the deprecated "linux,phandle" property, so that we
	 * don't break older kernels.
	 */
	ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);

	return ret;
}

/*
 * fdt_create_phandle: Create a phandle property for the given node
 *
 * @fdt: ptr to device tree
 * @nodeoffset: node to update
 */
unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
{
	/* see if there is a phandle already */
	int phandle = fdt_get_phandle(fdt, nodeoffset);

	/* if we got 0, means no phandle so create one */
	if (phandle == 0) {
		int ret;

		phandle = fdt_alloc_phandle(fdt);
		ret = fdt_set_phandle(fdt, nodeoffset, phandle);
		if (ret < 0) {
			printf("Can't set phandle %u: %s\n", phandle,
			       fdt_strerror(ret));
			return 0;
		}
	}

	return phandle;
}

/*
 * fdt_set_node_status: Set status for the given node
 *
 * @fdt: ptr to device tree
 * @nodeoffset: node to update
 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
 *	    FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
 */
int fdt_set_node_status(void *fdt, int nodeoffset,
			enum fdt_status status, unsigned int error_code)
{
	char buf[16];
	int ret = 0;

	if (nodeoffset < 0)
		return nodeoffset;

	switch (status) {
	case FDT_STATUS_OKAY:
		ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
		break;
	case FDT_STATUS_DISABLED:
		ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
		break;
	case FDT_STATUS_FAIL:
		ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
		break;
	case FDT_STATUS_FAIL_ERROR_CODE:
		sprintf(buf, "fail-%d", error_code);
		ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
		break;
	default:
		printf("Invalid fdt status: %x\n", status);
		ret = -1;
		break;
	}

	return ret;
}

/*
 * fdt_set_status_by_alias: Set status for the given node given an alias
 *
 * @fdt: ptr to device tree
 * @alias: alias of node to update
 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
 *	    FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
 */
int fdt_set_status_by_alias(void *fdt, const char* alias,
			    enum fdt_status status, unsigned int error_code)
{
	int offset = fdt_path_offset(fdt, alias);

	return fdt_set_node_status(fdt, offset, status, error_code);
}

#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
{
	int noff;
	int ret;

	noff = fdt_node_offset_by_compatible(blob, -1, compat);
	if (noff != -FDT_ERR_NOTFOUND) {
		debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
add_edid:
		ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
		if (ret == -FDT_ERR_NOSPACE) {
			ret = fdt_increase_size(blob, 512);
			if (!ret)
				goto add_edid;
			else
				goto err_size;
		} else if (ret < 0) {
			printf("Can't add property: %s\n", fdt_strerror(ret));
			return ret;
		}
	}
	return 0;
err_size:
	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
	return ret;
}
#endif

/*
 * Verify the physical address of device tree node for a given alias
 *
 * This function locates the device tree node of a given alias, and then
 * verifies that the physical address of that device matches the given
 * parameter.  It displays a message if there is a mismatch.
 *
 * Returns 1 on success, 0 on failure
 */
int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
{
	const char *path;
	const fdt32_t *reg;
	int node, len;
	u64 dt_addr;

	path = fdt_getprop(fdt, anode, alias, NULL);
	if (!path) {
		/* If there's no such alias, then it's not a failure */
		return 1;
	}

	node = fdt_path_offset(fdt, path);
	if (node < 0) {
		printf("Warning: device tree alias '%s' points to invalid "
		       "node %s.\n", alias, path);
		return 0;
	}

	reg = fdt_getprop(fdt, node, "reg", &len);
	if (!reg) {
		printf("Warning: device tree node '%s' has no address.\n",
		       path);
		return 0;
	}

	dt_addr = fdt_translate_address(fdt, node, reg);
	if (addr != dt_addr) {
		printf("Warning: U-Boot configured device %s at address %"
		       PRIx64 ",\n but the device tree has it address %"
		       PRIx64 ".\n", alias, addr, dt_addr);
		return 0;
	}

	return 1;
}

/*
 * Returns the base address of an SOC or PCI node
 */
u64 fdt_get_base_address(const void *fdt, int node)
{
	int size;
	const fdt32_t *prop;

	prop = fdt_getprop(fdt, node, "reg", &size);

	return prop ? fdt_translate_address(fdt, node, prop) : 0;
}

/*
 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
 */
static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
			 uint64_t *val, int cells)
{
	const fdt32_t *prop32 = &prop[cell_off];
	const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];

	if ((cell_off + cells) > prop_len)
		return -FDT_ERR_NOSPACE;

	switch (cells) {
	case 1:
		*val = fdt32_to_cpu(*prop32);
		break;
	case 2:
		*val = fdt64_to_cpu(*prop64);
		break;
	default:
		return -FDT_ERR_NOSPACE;
	}

	return 0;
}

/**
 * fdt_read_range - Read a node's n'th range property
 *
 * @fdt: ptr to device tree
 * @node: offset of node
 * @n: range index
 * @child_addr: pointer to storage for the "child address" field
 * @addr: pointer to storage for the CPU view translated physical start
 * @len: pointer to storage for the range length
 *
 * Convenience function that reads and interprets a specific range out of
 * a number of the "ranges" property array.
 */
int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
		   uint64_t *addr, uint64_t *len)
{
	int pnode = fdt_parent_offset(fdt, node);
	const fdt32_t *ranges;
	int pacells;
	int acells;
	int scells;
	int ranges_len;
	int cell = 0;
	int r = 0;

	/*
	 * The "ranges" property is an array of
	 * { <child address> <parent address> <size in child address space> }
	 *
	 * All 3 elements can span a diffent number of cells. Fetch their size.
	 */
	pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
	acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
	scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);

	/* Now try to get the ranges property */
	ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
	if (!ranges)
		return -FDT_ERR_NOTFOUND;
	ranges_len /= sizeof(uint32_t);

	/* Jump to the n'th entry */
	cell = n * (pacells + acells + scells);

	/* Read <child address> */
	if (child_addr) {
		r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
				  acells);
		if (r)
			return r;
	}
	cell += acells;

	/* Read <parent address> */
	if (addr)
		*addr = fdt_translate_address(fdt, node, ranges + cell);
	cell += pacells;

	/* Read <size in child address space> */
	if (len) {
		r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
		if (r)
			return r;
	}

	return 0;
}

/**
 * fdt_setup_simplefb_node - Fill and enable a simplefb node
 *
 * @fdt: ptr to device tree
 * @node: offset of the simplefb node
 * @base_address: framebuffer base address
 * @width: width in pixels
 * @height: height in pixels
 * @stride: bytes per line
 * @format: pixel format string
 *
 * Convenience function to fill and enable a simplefb node.
 */
int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
			    u32 height, u32 stride, const char *format)
{
	char name[32];
	fdt32_t cells[4];
	int i, addrc, sizec, ret;

	fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
					&addrc, &sizec);
	i = 0;
	if (addrc == 2)
		cells[i++] = cpu_to_fdt32(base_address >> 32);
	cells[i++] = cpu_to_fdt32(base_address);
	if (sizec == 2)
		cells[i++] = 0;
	cells[i++] = cpu_to_fdt32(height * stride);

	ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
	if (ret < 0)
		return ret;

	snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
	ret = fdt_set_name(fdt, node, name);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_u32(fdt, node, "width", width);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_u32(fdt, node, "height", height);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_u32(fdt, node, "stride", stride);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_string(fdt, node, "format", format);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_string(fdt, node, "status", "okay");
	if (ret < 0)
		return ret;

	return 0;
}

/*
 * Update native-mode in display-timings from display environment variable.
 * The node to update are specified by path.
 */
int fdt_fixup_display(void *blob, const char *path, const char *display)
{
	int off, toff;

	if (!display || !path)
		return -FDT_ERR_NOTFOUND;

	toff = fdt_path_offset(blob, path);
	if (toff >= 0)
		toff = fdt_subnode_offset(blob, toff, "display-timings");
	if (toff < 0)
		return toff;

	for (off = fdt_first_subnode(blob, toff);
	     off >= 0;
	     off = fdt_next_subnode(blob, off)) {
		uint32_t h = fdt_get_phandle(blob, off);
		debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
		      fdt32_to_cpu(h));
		if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
			return fdt_setprop_u32(blob, toff, "native-mode", h);
	}
	return toff;
}

#ifdef CONFIG_OF_LIBFDT_OVERLAY
/**
 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
 *
 * @fdt: ptr to device tree
 * @fdto: ptr to device tree overlay
 *
 * Convenience function to apply an overlay and display helpful messages
 * in the case of an error
 */
int fdt_overlay_apply_verbose(void *fdt, void *fdto)
{
	int err;
	bool has_symbols;

	err = fdt_path_offset(fdt, "/__symbols__");
	has_symbols = err >= 0;

	err = fdt_overlay_apply(fdt, fdto);
	if (err < 0) {
		printf("failed on fdt_overlay_apply(): %s\n",
				fdt_strerror(err));
		if (!has_symbols) {
			printf("base fdt does did not have a /__symbols__ node\n");
			printf("make sure you've compiled with -@\n");
		}
	}
	return err;
}
#endif