summaryrefslogtreecommitdiff
path: root/common/cmd_bootm.c
blob: 27bb494ff056cd3f9fb5559509cb3a5e6dd898b3 (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
/*
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Boot support
 */
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <zlib.h>
#include <bzlib.h>
#include <environment.h>
#include <asm/byteorder.h>

#ifdef CONFIG_OF_FLAT_TREE
#include <ft_build.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

 /*cmd_boot.c*/
 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);

#if (CONFIG_COMMANDS & CFG_CMD_DATE) || defined(CONFIG_TIMESTAMP)
#include <rtc.h>
#endif

#ifdef CFG_HUSH_PARSER
#include <hush.h>
#endif

#ifdef CONFIG_SHOW_BOOT_PROGRESS
# include <status_led.h>
# define SHOW_BOOT_PROGRESS(arg)	show_boot_progress(arg)
#else
# define SHOW_BOOT_PROGRESS(arg)
#endif

#ifdef CFG_INIT_RAM_LOCK
#include <asm/cache.h>
#endif

#ifdef CONFIG_LOGBUFFER
#include <logbuff.h>
#endif

#ifdef CONFIG_HAS_DATAFLASH
#include <dataflash.h>
#endif

/*
 * Some systems (for example LWMON) have very short watchdog periods;
 * we must make sure to split long operations like memmove() or
 * crc32() into reasonable chunks.
 */
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
# define CHUNKSZ (64 * 1024)
#endif

int  gunzip (void *, int, unsigned char *, unsigned long *);

static void *zalloc(void *, unsigned, unsigned);
static void zfree(void *, void *, unsigned);

#if (CONFIG_COMMANDS & CFG_CMD_IMI)
static int image_info (unsigned long addr);
#endif

#if (CONFIG_COMMANDS & CFG_CMD_IMLS)
#include <flash.h>
extern flash_info_t flash_info[]; /* info for FLASH chips */
static int do_imls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#endif

static void print_type (image_header_t *hdr);

#ifdef __I386__
image_header_t *fake_header(image_header_t *hdr, void *ptr, int size);
#endif

/*
 *  Continue booting an OS image; caller already has:
 *  - copied image header to global variable `header'
 *  - checked header magic number, checksums (both header & image),
 *  - verified image architecture (PPC) and type (KERNEL or MULTI),
 *  - loaded (first part of) image to header load address,
 *  - disabled interrupts.
 */
typedef void boot_os_Fcn (cmd_tbl_t *cmdtp, int flag,
			  int	argc, char *argv[],
			  ulong	addr,		/* of image to boot */
			  ulong	*len_ptr,	/* multi-file image length table */
			  int	verify);	/* getenv("verify")[0] != 'n' */

#ifdef	DEBUG
extern int do_bdinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#endif

#ifdef CONFIG_PPC
static boot_os_Fcn do_bootm_linux;
#else
extern boot_os_Fcn do_bootm_linux;
#endif
#ifdef CONFIG_SILENT_CONSOLE
static void fixup_silent_linux (void);
#endif
static boot_os_Fcn do_bootm_netbsd;
static boot_os_Fcn do_bootm_rtems;
#if (CONFIG_COMMANDS & CFG_CMD_ELF)
static boot_os_Fcn do_bootm_vxworks;
static boot_os_Fcn do_bootm_qnxelf;
int do_bootvx ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] );
int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] );
#endif /* CFG_CMD_ELF */
#if defined(CONFIG_ARTOS) && defined(CONFIG_PPC)
static boot_os_Fcn do_bootm_artos;
#endif
#ifdef CONFIG_LYNXKDI
static boot_os_Fcn do_bootm_lynxkdi;
extern void lynxkdi_boot( image_header_t * );
#endif

#ifndef CFG_BOOTM_LEN
#define CFG_BOOTM_LEN	0x800000	/* use 8MByte as default max gunzip size */
#endif

image_header_t header;

ulong load_addr = CFG_LOAD_ADDR;		/* Default Load Address */

int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	ulong	iflag;
	ulong	addr;
	ulong	data, len, checksum;
	ulong  *len_ptr;
	uint	unc_len = CFG_BOOTM_LEN;
	int	i, verify;
	char	*name, *s;
	int	(*appl)(int, char *[]);
	image_header_t *hdr = &header;

	s = getenv ("verify");
	verify = (s && (*s == 'n')) ? 0 : 1;

	if (argc < 2) {
		addr = load_addr;
	} else {
		addr = simple_strtoul(argv[1], NULL, 16);
	}

	SHOW_BOOT_PROGRESS (1);
	printf ("## Booting image at %08lx ...\n", addr);

	/* Copy header so we can blank CRC field for re-calculation */
#ifdef CONFIG_HAS_DATAFLASH
	if (addr_dataflash(addr)){
		read_dataflash(addr, sizeof(image_header_t), (char *)&header);
	} else
#endif
	memmove (&header, (char *)addr, sizeof(image_header_t));

	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
#ifdef __I386__	/* correct image format not implemented yet - fake it */
		if (fake_header(hdr, (void*)addr, -1) != NULL) {
			/* to compensate for the addition below */
			addr -= sizeof(image_header_t);
			/* turnof verify,
			 * fake_header() does not fake the data crc
			 */
			verify = 0;
		} else
#endif	/* __I386__ */
	    {
		puts ("Bad Magic Number\n");
		SHOW_BOOT_PROGRESS (-1);
		return 1;
	    }
	}
	SHOW_BOOT_PROGRESS (2);

	data = (ulong)&header;
	len  = sizeof(image_header_t);

	checksum = ntohl(hdr->ih_hcrc);
	hdr->ih_hcrc = 0;

	if (crc32 (0, (uchar *)data, len) != checksum) {
		puts ("Bad Header Checksum\n");
		SHOW_BOOT_PROGRESS (-2);
		return 1;
	}
	SHOW_BOOT_PROGRESS (3);

#ifdef CONFIG_HAS_DATAFLASH
	if (addr_dataflash(addr)){
		len  = ntohl(hdr->ih_size) + sizeof(image_header_t);
		read_dataflash(addr, len, (char *)CFG_LOAD_ADDR);
		addr = CFG_LOAD_ADDR;
	}
#endif


	/* for multi-file images we need the data part, too */
	print_image_hdr ((image_header_t *)addr);

	data = addr + sizeof(image_header_t);
	len  = ntohl(hdr->ih_size);

	if (verify) {
		puts ("   Verifying Checksum ... ");
		if (crc32 (0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
			printf ("Bad Data CRC\n");
			SHOW_BOOT_PROGRESS (-3);
			return 1;
		}
		puts ("OK\n");
	}
	SHOW_BOOT_PROGRESS (4);

	len_ptr = (ulong *)data;

#if defined(__PPC__)
	if (hdr->ih_arch != IH_CPU_PPC)
#elif defined(__ARM__)
	if (hdr->ih_arch != IH_CPU_ARM)
#elif defined(__I386__)
	if (hdr->ih_arch != IH_CPU_I386)
#elif defined(__mips__)
	if (hdr->ih_arch != IH_CPU_MIPS)
#elif defined(__nios__)
	if (hdr->ih_arch != IH_CPU_NIOS)
#elif defined(__M68K__)
	if (hdr->ih_arch != IH_CPU_M68K)
#elif defined(__microblaze__)
	if (hdr->ih_arch != IH_CPU_MICROBLAZE)
#elif defined(__nios2__)
	if (hdr->ih_arch != IH_CPU_NIOS2)
#elif defined(__blackfin__)
	if (hdr->ih_arch != IH_CPU_BLACKFIN)
#else
# error Unknown CPU type
#endif
	{
		printf ("Unsupported Architecture 0x%x\n", hdr->ih_arch);
		SHOW_BOOT_PROGRESS (-4);
		return 1;
	}
	SHOW_BOOT_PROGRESS (5);

	switch (hdr->ih_type) {
	case IH_TYPE_STANDALONE:
		name = "Standalone Application";
		/* A second argument overwrites the load address */
		if (argc > 2) {
			hdr->ih_load = htonl(simple_strtoul(argv[2], NULL, 16));
		}
		break;
	case IH_TYPE_KERNEL:
		name = "Kernel Image";
		break;
	case IH_TYPE_MULTI:
		name = "Multi-File Image";
		len  = ntohl(len_ptr[0]);
		/* OS kernel is always the first image */
		data += 8; /* kernel_len + terminator */
		for (i=1; len_ptr[i]; ++i)
			data += 4;
		break;
	default: printf ("Wrong Image Type for %s command\n", cmdtp->name);
		SHOW_BOOT_PROGRESS (-5);
		return 1;
	}
	SHOW_BOOT_PROGRESS (6);

	/*
	 * We have reached the point of no return: we are going to
	 * overwrite all exception vector code, so we cannot easily
	 * recover from any failures any more...
	 */

	iflag = disable_interrupts();

#ifdef CONFIG_AMIGAONEG3SE
	/*
	 * We've possible left the caches enabled during
	 * bios emulation, so turn them off again
	 */
	icache_disable();
	invalidate_l1_instruction_cache();
	flush_data_cache();
	dcache_disable();
#endif

	switch (hdr->ih_comp) {
	case IH_COMP_NONE:
		if(ntohl(hdr->ih_load) == addr) {
			printf ("   XIP %s ... ", name);
		} else {
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
			size_t l = len;
			void *to = (void *)ntohl(hdr->ih_load);
			void *from = (void *)data;

			printf ("   Loading %s ... ", name);

			while (l > 0) {
				size_t tail = (l > CHUNKSZ) ? CHUNKSZ : l;
				WATCHDOG_RESET();
				memmove (to, from, tail);
				to += tail;
				from += tail;
				l -= tail;
			}
#else	/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
			memmove ((void *) ntohl(hdr->ih_load), (uchar *)data, len);
#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
		}
		break;
	case IH_COMP_GZIP:
		printf ("   Uncompressing %s ... ", name);
		if (gunzip ((void *)ntohl(hdr->ih_load), unc_len,
			    (uchar *)data, &len) != 0) {
			puts ("GUNZIP ERROR - must RESET board to recover\n");
			SHOW_BOOT_PROGRESS (-6);
			do_reset (cmdtp, flag, argc, argv);
		}
		break;
#ifdef CONFIG_BZIP2
	case IH_COMP_BZIP2:
		printf ("   Uncompressing %s ... ", name);
		/*
		 * If we've got less than 4 MB of malloc() space,
		 * use slower decompression algorithm which requires
		 * at most 2300 KB of memory.
		 */
		i = BZ2_bzBuffToBuffDecompress ((char*)ntohl(hdr->ih_load),
						&unc_len, (char *)data, len,
						CFG_MALLOC_LEN < (4096 * 1024), 0);
		if (i != BZ_OK) {
			printf ("BUNZIP2 ERROR %d - must RESET board to recover\n", i);
			SHOW_BOOT_PROGRESS (-6);
			udelay(100000);
			do_reset (cmdtp, flag, argc, argv);
		}
		break;
#endif /* CONFIG_BZIP2 */
	default:
		if (iflag)
			enable_interrupts();
		printf ("Unimplemented compression type %d\n", hdr->ih_comp);
		SHOW_BOOT_PROGRESS (-7);
		return 1;
	}
	puts ("OK\n");
	SHOW_BOOT_PROGRESS (7);

	switch (hdr->ih_type) {
	case IH_TYPE_STANDALONE:
		if (iflag)
			enable_interrupts();

		/* load (and uncompress), but don't start if "autostart"
		 * is set to "no"
		 */
		if (((s = getenv("autostart")) != NULL) && (strcmp(s,"no") == 0)) {
			char buf[32];
			sprintf(buf, "%lX", len);
			setenv("filesize", buf);
			return 0;
		}
		appl = (int (*)(int, char *[]))ntohl(hdr->ih_ep);
		(*appl)(argc-1, &argv[1]);
		return 0;
	case IH_TYPE_KERNEL:
	case IH_TYPE_MULTI:
		/* handled below */
		break;
	default:
		if (iflag)
			enable_interrupts();
		printf ("Can't boot image type %d\n", hdr->ih_type);
		SHOW_BOOT_PROGRESS (-8);
		return 1;
	}
	SHOW_BOOT_PROGRESS (8);

	switch (hdr->ih_os) {
	default:			/* handled by (original) Linux case */
	case IH_OS_LINUX:
#ifdef CONFIG_SILENT_CONSOLE
	    fixup_silent_linux();
#endif
	    do_bootm_linux  (cmdtp, flag, argc, argv,
			     addr, len_ptr, verify);
	    break;
	case IH_OS_NETBSD:
	    do_bootm_netbsd (cmdtp, flag, argc, argv,
			     addr, len_ptr, verify);
	    break;

#ifdef CONFIG_LYNXKDI
	case IH_OS_LYNXOS:
	    do_bootm_lynxkdi (cmdtp, flag, argc, argv,
			     addr, len_ptr, verify);
	    break;
#endif

	case IH_OS_RTEMS:
	    do_bootm_rtems (cmdtp, flag, argc, argv,
			     addr, len_ptr, verify);
	    break;

#if (CONFIG_COMMANDS & CFG_CMD_ELF)
	case IH_OS_VXWORKS:
	    do_bootm_vxworks (cmdtp, flag, argc, argv,
			      addr, len_ptr, verify);
	    break;
	case IH_OS_QNX:
	    do_bootm_qnxelf (cmdtp, flag, argc, argv,
			      addr, len_ptr, verify);
	    break;
#endif /* CFG_CMD_ELF */
#ifdef CONFIG_ARTOS
	case IH_OS_ARTOS:
	    do_bootm_artos  (cmdtp, flag, argc, argv,
			     addr, len_ptr, verify);
	    break;
#endif
	}

	SHOW_BOOT_PROGRESS (-9);
#ifdef DEBUG
	puts ("\n## Control returned to monitor - resetting...\n");
	do_reset (cmdtp, flag, argc, argv);
#endif
	return 1;
}

U_BOOT_CMD(
 	bootm,	CFG_MAXARGS,	1,	do_bootm,
 	"bootm   - boot application image from memory\n",
 	"[addr [arg ...]]\n    - boot application image stored in memory\n"
 	"\tpassing arguments 'arg ...'; when booting a Linux kernel,\n"
 	"\t'arg' can be the address of an initrd image\n"
#ifdef CONFIG_OF_FLAT_TREE
	"\tWhen booting a Linux kernel which requires a flat device-tree\n"
	"\ta third argument is required which is the address of the of the\n"
	"\tdevice-tree blob. To boot that kernel without an initrd image,\n"
	"\tuse a '-' for the second argument. If you do not pass a third\n"
	"\ta bd_info struct will be passed instead\n"
#endif
);

#ifdef CONFIG_SILENT_CONSOLE
static void
fixup_silent_linux ()
{
	char buf[256], *start, *end;
	char *cmdline = getenv ("bootargs");

	/* Only fix cmdline when requested */
	if (!(gd->flags & GD_FLG_SILENT))
		return;

	debug ("before silent fix-up: %s\n", cmdline);
	if (cmdline) {
		if ((start = strstr (cmdline, "console=")) != NULL) {
			end = strchr (start, ' ');
			strncpy (buf, cmdline, (start - cmdline + 8));
			if (end)
				strcpy (buf + (start - cmdline + 8), end);
			else
				buf[start - cmdline + 8] = '\0';
		} else {
			strcpy (buf, cmdline);
			strcat (buf, " console=");
		}
	} else {
		strcpy (buf, "console=");
	}

	setenv ("bootargs", buf);
	debug ("after silent fix-up: %s\n", buf);
}
#endif /* CONFIG_SILENT_CONSOLE */

#ifdef CONFIG_PPC
static void
do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
		int	argc, char *argv[],
		ulong	addr,
		ulong	*len_ptr,
		int	verify)
{
	ulong	sp;
	ulong	len, checksum;
	ulong	initrd_start, initrd_end;
	ulong	cmd_start, cmd_end;
	ulong	initrd_high;
	ulong	data;
	int	initrd_copy_to_ram = 1;
	char    *cmdline;
	char	*s;
	bd_t	*kbd;
	void	(*kernel)(bd_t *, ulong, ulong, ulong, ulong);
	image_header_t *hdr = &header;
#ifdef CONFIG_OF_FLAT_TREE
	char	*of_flat_tree = NULL;
#endif

	if ((s = getenv ("initrd_high")) != NULL) {
		/* a value of "no" or a similar string will act like 0,
		 * turning the "load high" feature off. This is intentional.
		 */
		initrd_high = simple_strtoul(s, NULL, 16);
		if (initrd_high == ~0)
			initrd_copy_to_ram = 0;
	} else {	/* not set, no restrictions to load high */
		initrd_high = ~0;
	}

#ifdef CONFIG_LOGBUFFER
	kbd=gd->bd;
	/* Prevent initrd from overwriting logbuffer */
	if (initrd_high < (kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD))
		initrd_high = kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD;
	debug ("## Logbuffer at 0x%08lX ", kbd->bi_memsize-LOGBUFF_LEN);
#endif

	/*
	 * Booting a (Linux) kernel image
	 *
	 * Allocate space for command line and board info - the
	 * address should be as high as possible within the reach of
	 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
	 * memory, which means far enough below the current stack
	 * pointer.
	 */

	asm( "mr %0,1": "=r"(sp) : );

	debug ("## Current stack ends at 0x%08lX ", sp);

	sp -= 2048;		/* just to be sure */
	if (sp > CFG_BOOTMAPSZ)
		sp = CFG_BOOTMAPSZ;
	sp &= ~0xF;

	debug ("=> set upper limit to 0x%08lX\n", sp);

	cmdline = (char *)((sp - CFG_BARGSIZE) & ~0xF);
	kbd = (bd_t *)(((ulong)cmdline - sizeof(bd_t)) & ~0xF);

	if ((s = getenv("bootargs")) == NULL)
		s = "";

	strcpy (cmdline, s);

	cmd_start    = (ulong)&cmdline[0];
	cmd_end      = cmd_start + strlen(cmdline);

	*kbd = *(gd->bd);

#ifdef	DEBUG
	printf ("## cmdline at 0x%08lX ... 0x%08lX\n", cmd_start, cmd_end);

	do_bdinfo (NULL, 0, 0, NULL);
#endif

	if ((s = getenv ("clocks_in_mhz")) != NULL) {
		/* convert all clock information to MHz */
		kbd->bi_intfreq /= 1000000L;
		kbd->bi_busfreq /= 1000000L;
#if defined(CONFIG_MPC8220)
	kbd->bi_inpfreq /= 1000000L;
	kbd->bi_pcifreq /= 1000000L;
	kbd->bi_pevfreq /= 1000000L;
	kbd->bi_flbfreq /= 1000000L;
	kbd->bi_vcofreq /= 1000000L;
#endif
#if defined(CONFIG_CPM2)
		kbd->bi_cpmfreq /= 1000000L;
		kbd->bi_brgfreq /= 1000000L;
		kbd->bi_sccfreq /= 1000000L;
		kbd->bi_vco     /= 1000000L;
#endif
#if defined(CONFIG_MPC5xxx)
		kbd->bi_ipbfreq /= 1000000L;
		kbd->bi_pcifreq /= 1000000L;
#endif /* CONFIG_MPC5xxx */
	}

	kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong)) ntohl(hdr->ih_ep);

	/*
	 * Check if there is an initrd image
	 */

#ifdef CONFIG_OF_FLAT_TREE
	/* Look for a '-' which indicates to ignore the ramdisk argument */
	if (argc >= 3 && strcmp(argv[2], "-") ==  0) {
			debug ("Skipping initrd\n");
			data = 0;
		}
	else
#endif
	if (argc >= 3) {
		debug ("Not skipping initrd\n");
		SHOW_BOOT_PROGRESS (9);

		addr = simple_strtoul(argv[2], NULL, 16);

		printf ("## Loading RAMDisk Image at %08lx ...\n", addr);

		/* Copy header so we can blank CRC field for re-calculation */
		memmove (&header, (char *)addr, sizeof(image_header_t));

		if (ntohl(hdr->ih_magic)  != IH_MAGIC) {
			puts ("Bad Magic Number\n");
			SHOW_BOOT_PROGRESS (-10);
			do_reset (cmdtp, flag, argc, argv);
		}

		data = (ulong)&header;
		len  = sizeof(image_header_t);

		checksum = ntohl(hdr->ih_hcrc);
		hdr->ih_hcrc = 0;

		if (crc32 (0, (uchar *)data, len) != checksum) {
			puts ("Bad Header Checksum\n");
			SHOW_BOOT_PROGRESS (-11);
			do_reset (cmdtp, flag, argc, argv);
		}

		SHOW_BOOT_PROGRESS (10);

		print_image_hdr (hdr);

		data = addr + sizeof(image_header_t);
		len  = ntohl(hdr->ih_size);

		if (verify) {
			ulong csum = 0;
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
			ulong cdata = data, edata = cdata + len;
#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */

			puts ("   Verifying Checksum ... ");

#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)

			while (cdata < edata) {
				ulong chunk = edata - cdata;

				if (chunk > CHUNKSZ)
					chunk = CHUNKSZ;
				csum = crc32 (csum, (uchar *)cdata, chunk);
				cdata += chunk;

				WATCHDOG_RESET();
			}
#else	/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
			csum = crc32 (0, (uchar *)data, len);
#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */

			if (csum != ntohl(hdr->ih_dcrc)) {
				puts ("Bad Data CRC\n");
				SHOW_BOOT_PROGRESS (-12);
				do_reset (cmdtp, flag, argc, argv);
			}
			puts ("OK\n");
		}

		SHOW_BOOT_PROGRESS (11);

		if ((hdr->ih_os   != IH_OS_LINUX)	||
		    (hdr->ih_arch != IH_CPU_PPC)	||
		    (hdr->ih_type != IH_TYPE_RAMDISK)	) {
			puts ("No Linux PPC Ramdisk Image\n");
			SHOW_BOOT_PROGRESS (-13);
			do_reset (cmdtp, flag, argc, argv);
		}

		/*
		 * Now check if we have a multifile image
		 */
	} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
		u_long tail    = ntohl(len_ptr[0]) % 4;
		int i;

		SHOW_BOOT_PROGRESS (13);

		/* skip kernel length and terminator */
		data = (ulong)(&len_ptr[2]);
		/* skip any additional image length fields */
		for (i=1; len_ptr[i]; ++i)
			data += 4;
		/* add kernel length, and align */
		data += ntohl(len_ptr[0]);
		if (tail) {
			data += 4 - tail;
		}

		len   = ntohl(len_ptr[1]);

	} else {
		/*
		 * no initrd image
		 */
		SHOW_BOOT_PROGRESS (14);

		len = data = 0;
	}

#ifdef CONFIG_OF_FLAT_TREE
	if(argc > 3) {	
		of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
		hdr = (image_header_t *)of_flat_tree;
		
		if  (*(ulong *)of_flat_tree == OF_DT_HEADER) {
#ifndef CFG_NO_FLASH
			if (addr2info((ulong)of_flat_tree) != NULL) {
				printf ("Cannot modify flat device tree stored in flash\n" \
					"Copy to memory before using the bootm command\n");
				return;
			}
#endif
		} else if (ntohl(hdr->ih_magic) == IH_MAGIC) {
			printf("## Flat Device Tree Image at %08lX\n", hdr);
			print_image_hdr(hdr);

			if ((ntohl(hdr->ih_load) <  ((unsigned long)hdr + ntohl(hdr->ih_size) + sizeof(hdr))) &&
			   ((ntohl(hdr->ih_load) + ntohl(hdr->ih_size)) > (unsigned long)hdr)) {
				printf ("ERROR: Load address overwrites Flat Device Tree uImage\n");
				return;
			}
			
			printf("   Verifying Checksum ... ");
			memmove (&header, (char *)hdr, sizeof(image_header_t));
			checksum = ntohl(header.ih_hcrc);
			header.ih_hcrc = 0;

			if(checksum != crc32(0, (uchar *)&header, sizeof(image_header_t))) {
				printf("ERROR: Flat Device Tree header checksum is invalid\n");
				return;
			}

			checksum = ntohl(hdr->ih_dcrc);
			addr = (ulong)((uchar *)(hdr) + sizeof(image_header_t));
			len = ntohl(hdr->ih_size);

			if(checksum != crc32(0, (uchar *)addr, len)) {
				printf("ERROR: Flat Device Tree checksum is invalid\n");
				return;
			}
			printf("OK\n");

			if (ntohl(hdr->ih_type) != IH_TYPE_FLATDT) {
				printf ("ERROR: uImage not Flat Device Tree type\n");
				return;
			}
			if (ntohl(hdr->ih_comp) != IH_COMP_NONE) {
				printf("ERROR: uImage is not uncompressed\n");
				return;
			}
			if (*((ulong *)(of_flat_tree + sizeof(image_header_t))) != OF_DT_HEADER) {
				printf ("ERROR: uImage data is not a flat device tree\n");
				return;
			}
					
			memmove((void *)ntohl(hdr->ih_load), 
		       		(void *)(of_flat_tree + sizeof(image_header_t)),
				ntohl(hdr->ih_size));
			of_flat_tree = (char *)ntohl(hdr->ih_load);
		} else {
			printf ("Did not find a flat flat device tree at address %08lX\n", of_flat_tree);
			return;
		}
		printf ("   Booting using flat device tree at 0x%x\n",
				of_flat_tree);
	} else if(getenv("disable_of") == NULL) {
		printf ("ERROR: bootm needs flat device tree as third argument\n");
		return;
	}
#endif
	if (!data) {
		debug ("No initrd\n");
	}

	if (data) {
	    if (!initrd_copy_to_ram) {	/* zero-copy ramdisk support */
		initrd_start = data;
		initrd_end = initrd_start + len;
	    } else {
		initrd_start  = (ulong)kbd - len;
		initrd_start &= ~(4096 - 1);	/* align on page */

		if (initrd_high) {
			ulong nsp;

			/*
			 * the inital ramdisk does not need to be within
			 * CFG_BOOTMAPSZ as it is not accessed until after
			 * the mm system is initialised.
			 *
			 * do the stack bottom calculation again and see if
			 * the initrd will fit just below the monitor stack
			 * bottom without overwriting the area allocated
			 * above for command line args and board info.
			 */
			asm( "mr %0,1": "=r"(nsp) : );
			nsp -= 2048;		/* just to be sure */
			nsp &= ~0xF;
			if (nsp > initrd_high)	/* limit as specified */
				nsp = initrd_high;
			nsp -= len;
			nsp &= ~(4096 - 1);	/* align on page */
			if (nsp >= sp)
				initrd_start = nsp;
		}

		SHOW_BOOT_PROGRESS (12);

		debug ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
			data, data + len - 1, len, len);

		initrd_end    = initrd_start + len;
		printf ("   Loading Ramdisk to %08lx, end %08lx ... ",
			initrd_start, initrd_end);
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
		{
			size_t l = len;
			void *to = (void *)initrd_start;
			void *from = (void *)data;

			while (l > 0) {
				size_t tail = (l > CHUNKSZ) ? CHUNKSZ : l;
				WATCHDOG_RESET();
				memmove (to, from, tail);
				to += tail;
				from += tail;
				l -= tail;
			}
		}
#else	/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
		memmove ((void *)initrd_start, (void *)data, len);
#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
		puts ("OK\n");
	    }
	} else {
		initrd_start = 0;
		initrd_end = 0;
	}

	debug ("## Transferring control to Linux (at address %08lx) ...\n",
		(ulong)kernel);

	SHOW_BOOT_PROGRESS (15);

#ifndef CONFIG_OF_FLAT_TREE

#if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
	unlock_ram_in_cache();
#endif

	/*
	 * Linux Kernel Parameters:
	 *   r3: ptr to board info data
	 *   r4: initrd_start or 0 if no initrd
	 *   r5: initrd_end - unused if r4 is 0
	 *   r6: Start of command line string
	 *   r7: End   of command line string
	 */
	(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);

#else
	ft_setup(of_flat_tree, kbd, initrd_start, initrd_end);
	/* ft_dump_blob(of_flat_tree); */

#if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
	unlock_ram_in_cache();
#endif
	/*
	 * Linux Kernel Parameters:
	 *   r3: ptr to OF flat tree, followed by the board info data
	 *   r4: physical pointer to the kernel itself
	 *   r5: NULL
	 *   r6: NULL
	 *   r7: NULL
	 */
	if (getenv("disable_of") != NULL)
		(*kernel) ((bd_t *)of_flat_tree, initrd_start, initrd_end,
			cmd_start, cmd_end);
	else
		(*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);

#endif
}
#endif /* CONFIG_PPC */

static void
do_bootm_netbsd (cmd_tbl_t *cmdtp, int flag,
		int	argc, char *argv[],
		ulong	addr,
		ulong	*len_ptr,
		int	verify)
{
	image_header_t *hdr = &header;

	void	(*loader)(bd_t *, image_header_t *, char *, char *);
	image_header_t *img_addr;
	char     *consdev;
	char     *cmdline;


	/*
	 * Booting a (NetBSD) kernel image
	 *
	 * This process is pretty similar to a standalone application:
	 * The (first part of an multi-) image must be a stage-2 loader,
	 * which in turn is responsible for loading & invoking the actual
	 * kernel.  The only differences are the parameters being passed:
	 * besides the board info strucure, the loader expects a command
	 * line, the name of the console device, and (optionally) the
	 * address of the original image header.
	 */

	img_addr = 0;
	if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1]))
		img_addr = (image_header_t *) addr;


	consdev = "";
#if   defined (CONFIG_8xx_CONS_SMC1)
	consdev = "smc1";
#elif defined (CONFIG_8xx_CONS_SMC2)
	consdev = "smc2";
#elif defined (CONFIG_8xx_CONS_SCC2)
	consdev = "scc2";
#elif defined (CONFIG_8xx_CONS_SCC3)
	consdev = "scc3";
#endif

	if (argc > 2) {
		ulong len;
		int   i;

		for (i=2, len=0 ; i<argc ; i+=1)
			len += strlen (argv[i]) + 1;
		cmdline = malloc (len);

		for (i=2, len=0 ; i<argc ; i+=1) {
			if (i > 2)
				cmdline[len++] = ' ';
			strcpy (&cmdline[len], argv[i]);
			len += strlen (argv[i]);
		}
	} else if ((cmdline = getenv("bootargs")) == NULL) {
		cmdline = "";
	}

	loader = (void (*)(bd_t *, image_header_t *, char *, char *)) ntohl(hdr->ih_ep);

	printf ("## Transferring control to NetBSD stage-2 loader (at address %08lx) ...\n",
		(ulong)loader);

	SHOW_BOOT_PROGRESS (15);

	/*
	 * NetBSD Stage-2 Loader Parameters:
	 *   r3: ptr to board info data
	 *   r4: image address
	 *   r5: console device
	 *   r6: boot args string
	 */
	(*loader) (gd->bd, img_addr, consdev, cmdline);
}

#if defined(CONFIG_ARTOS) && defined(CONFIG_PPC)

/* Function that returns a character from the environment */
extern uchar (*env_get_char)(int);

static void
do_bootm_artos (cmd_tbl_t *cmdtp, int flag,
		int	argc, char *argv[],
		ulong	addr,
		ulong	*len_ptr,
		int	verify)
{
	ulong top;
	char *s, *cmdline;
	char **fwenv, **ss;
	int i, j, nxt, len, envno, envsz;
	bd_t *kbd;
	void (*entry)(bd_t *bd, char *cmdline, char **fwenv, ulong top);
	image_header_t *hdr = &header;

	/*
	 * Booting an ARTOS kernel image + application
	 */

	/* this used to be the top of memory, but was wrong... */
#ifdef CONFIG_PPC
	/* get stack pointer */
	asm volatile ("mr %0,1" : "=r"(top) );
#endif
	debug ("## Current stack ends at 0x%08lX ", top);

	top -= 2048;		/* just to be sure */
	if (top > CFG_BOOTMAPSZ)
		top = CFG_BOOTMAPSZ;
	top &= ~0xF;

	debug ("=> set upper limit to 0x%08lX\n", top);

	/* first check the artos specific boot args, then the linux args*/
	if ((s = getenv("abootargs")) == NULL && (s = getenv("bootargs")) == NULL)
		s = "";

	/* get length of cmdline, and place it */
	len = strlen(s);
	top = (top - (len + 1)) & ~0xF;
	cmdline = (char *)top;
	debug ("## cmdline at 0x%08lX ", top);
	strcpy(cmdline, s);

	/* copy bdinfo */
	top = (top - sizeof(bd_t)) & ~0xF;
	debug ("## bd at 0x%08lX ", top);
	kbd = (bd_t *)top;
	memcpy(kbd, gd->bd, sizeof(bd_t));

	/* first find number of env entries, and their size */
	envno = 0;
	envsz = 0;
	for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
		for (nxt = i; env_get_char(nxt) != '\0'; ++nxt)
			;
		envno++;
		envsz += (nxt - i) + 1;	/* plus trailing zero */
	}
	envno++;	/* plus the terminating zero */
	debug ("## %u envvars total size %u ", envno, envsz);

	top = (top - sizeof(char **)*envno) & ~0xF;
	fwenv = (char **)top;
	debug ("## fwenv at 0x%08lX ", top);

	top = (top - envsz) & ~0xF;
	s = (char *)top;
	ss = fwenv;

	/* now copy them */
	for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
		for (nxt = i; env_get_char(nxt) != '\0'; ++nxt)
			;
		*ss++ = s;
		for (j = i; j < nxt; ++j)
			*s++ = env_get_char(j);
		*s++ = '\0';
	}
	*ss++ = NULL;	/* terminate */

	entry = (void (*)(bd_t *, char *, char **, ulong))ntohl(hdr->ih_ep);
	(*entry)(kbd, cmdline, fwenv, top);
}
#endif


#if (CONFIG_COMMANDS & CFG_CMD_BOOTD)
int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	int rcode = 0;
#ifndef CFG_HUSH_PARSER
	if (run_command (getenv ("bootcmd"), flag) < 0) rcode = 1;
#else
	if (parse_string_outer(getenv("bootcmd"),
		FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0 ) rcode = 1;
#endif
	return rcode;
}

U_BOOT_CMD(
 	boot,	1,	1,	do_bootd,
 	"boot    - boot default, i.e., run 'bootcmd'\n",
	NULL
);

/* keep old command name "bootd" for backward compatibility */
U_BOOT_CMD(
 	bootd, 1,	1,	do_bootd,
 	"bootd   - boot default, i.e., run 'bootcmd'\n",
	NULL
);

#endif

#if (CONFIG_COMMANDS & CFG_CMD_IMI)
int do_iminfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	int	arg;
	ulong	addr;
	int     rcode=0;

	if (argc < 2) {
		return image_info (load_addr);
	}

	for (arg=1; arg <argc; ++arg) {
		addr = simple_strtoul(argv[arg], NULL, 16);
		if (image_info (addr) != 0) rcode = 1;
	}
	return rcode;
}

static int image_info (ulong addr)
{
	ulong	data, len, checksum;
	image_header_t *hdr = &header;

	printf ("\n## Checking Image at %08lx ...\n", addr);

	/* Copy header so we can blank CRC field for re-calculation */
	memmove (&header, (char *)addr, sizeof(image_header_t));

	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
		puts ("   Bad Magic Number\n");
		return 1;
	}

	data = (ulong)&header;
	len  = sizeof(image_header_t);

	checksum = ntohl(hdr->ih_hcrc);
	hdr->ih_hcrc = 0;

	if (crc32 (0, (uchar *)data, len) != checksum) {
		puts ("   Bad Header Checksum\n");
		return 1;
	}

	/* for multi-file images we need the data part, too */
	print_image_hdr ((image_header_t *)addr);

	data = addr + sizeof(image_header_t);
	len  = ntohl(hdr->ih_size);

	puts ("   Verifying Checksum ... ");
	if (crc32 (0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
		puts ("   Bad Data CRC\n");
		return 1;
	}
	puts ("OK\n");
	return 0;
}

U_BOOT_CMD(
	iminfo,	CFG_MAXARGS,	1,	do_iminfo,
	"iminfo  - print header information for application image\n",
	"addr [addr ...]\n"
	"    - print header information for application image starting at\n"
	"      address 'addr' in memory; this includes verification of the\n"
	"      image contents (magic number, header and payload checksums)\n"
);

#endif	/* CFG_CMD_IMI */

#if (CONFIG_COMMANDS & CFG_CMD_IMLS)
/*-----------------------------------------------------------------------
 * List all images found in flash.
 */
int do_imls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	flash_info_t *info;
	int i, j;
	image_header_t *hdr;
	ulong data, len, checksum;

	for (i=0, info=&flash_info[0]; i<CFG_MAX_FLASH_BANKS; ++i, ++info) {
		if (info->flash_id == FLASH_UNKNOWN)
			goto next_bank;
		for (j=0; j<info->sector_count; ++j) {

			if (!(hdr=(image_header_t *)info->start[j]) ||
			    (ntohl(hdr->ih_magic) != IH_MAGIC))
				goto next_sector;

			/* Copy header so we can blank CRC field for re-calculation */
			memmove (&header, (char *)hdr, sizeof(image_header_t));

			checksum = ntohl(header.ih_hcrc);
			header.ih_hcrc = 0;

			if (crc32 (0, (uchar *)&header, sizeof(image_header_t))
			    != checksum)
				goto next_sector;

			printf ("Image at %08lX:\n", (ulong)hdr);
			print_image_hdr( hdr );

			data = (ulong)hdr + sizeof(image_header_t);
			len  = ntohl(hdr->ih_size);

			puts ("   Verifying Checksum ... ");
			if (crc32 (0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
				puts ("   Bad Data CRC\n");
			}
			puts ("OK\n");
next_sector:		;
		}
next_bank:	;
	}

	return (0);
}

U_BOOT_CMD(
	imls,	1,		1,	do_imls,
	"imls    - list all images found in flash\n",
	"\n"
	"    - Prints information about all images found at sector\n"
	"      boundaries in flash.\n"
);
#endif	/* CFG_CMD_IMLS */

void
print_image_hdr (image_header_t *hdr)
{
#if (CONFIG_COMMANDS & CFG_CMD_DATE) || defined(CONFIG_TIMESTAMP)
	time_t timestamp = (time_t)ntohl(hdr->ih_time);
	struct rtc_time tm;
#endif

	printf ("   Image Name:   %.*s\n", IH_NMLEN, hdr->ih_name);
#if (CONFIG_COMMANDS & CFG_CMD_DATE) || defined(CONFIG_TIMESTAMP)
	to_tm (timestamp, &tm);
	printf ("   Created:      %4d-%02d-%02d  %2d:%02d:%02d UTC\n",
		tm.tm_year, tm.tm_mon, tm.tm_mday,
		tm.tm_hour, tm.tm_min, tm.tm_sec);
#endif	/* CFG_CMD_DATE, CONFIG_TIMESTAMP */
	puts ("   Image Type:   "); print_type(hdr);
	printf ("\n   Data Size:    %d Bytes = ", ntohl(hdr->ih_size));
	print_size (ntohl(hdr->ih_size), "\n");
	printf ("   Load Address: %08x\n"
		"   Entry Point:  %08x\n",
		 ntohl(hdr->ih_load), ntohl(hdr->ih_ep));

	if (hdr->ih_type == IH_TYPE_MULTI) {
		int i;
		ulong len;
		ulong *len_ptr = (ulong *)((ulong)hdr + sizeof(image_header_t));

		puts ("   Contents:\n");
		for (i=0; (len = ntohl(*len_ptr)); ++i, ++len_ptr) {
			printf ("   Image %d: %8ld Bytes = ", i, len);
			print_size (len, "\n");
		}
	}
}


static void
print_type (image_header_t *hdr)
{
	char *os, *arch, *type, *comp;

	switch (hdr->ih_os) {
	case IH_OS_INVALID:	os = "Invalid OS";		break;
	case IH_OS_NETBSD:	os = "NetBSD";			break;
	case IH_OS_LINUX:	os = "Linux";			break;
	case IH_OS_VXWORKS:	os = "VxWorks";			break;
	case IH_OS_QNX:		os = "QNX";			break;
	case IH_OS_U_BOOT:	os = "U-Boot";			break;
	case IH_OS_RTEMS:	os = "RTEMS";			break;
#ifdef CONFIG_ARTOS
	case IH_OS_ARTOS:	os = "ARTOS";			break;
#endif
#ifdef CONFIG_LYNXKDI
	case IH_OS_LYNXOS:	os = "LynxOS";			break;
#endif
	default:		os = "Unknown OS";		break;
	}

	switch (hdr->ih_arch) {
	case IH_CPU_INVALID:	arch = "Invalid CPU";		break;
	case IH_CPU_ALPHA:	arch = "Alpha";			break;
	case IH_CPU_ARM:	arch = "ARM";			break;
	case IH_CPU_I386:	arch = "Intel x86";		break;
	case IH_CPU_IA64:	arch = "IA64";			break;
	case IH_CPU_MIPS:	arch = "MIPS";			break;
	case IH_CPU_MIPS64:	arch = "MIPS 64 Bit";		break;
	case IH_CPU_PPC:	arch = "PowerPC";		break;
	case IH_CPU_S390:	arch = "IBM S390";		break;
	case IH_CPU_SH:		arch = "SuperH";		break;
	case IH_CPU_SPARC:	arch = "SPARC";			break;
	case IH_CPU_SPARC64:	arch = "SPARC 64 Bit";		break;
	case IH_CPU_M68K:	arch = "M68K"; 			break;
	case IH_CPU_MICROBLAZE:	arch = "Microblaze"; 		break;
	case IH_CPU_NIOS:	arch = "Nios";			break;
	case IH_CPU_NIOS2:	arch = "Nios-II";		break;
	default:		arch = "Unknown Architecture";	break;
	}

	switch (hdr->ih_type) {
	case IH_TYPE_INVALID:	type = "Invalid Image";		break;
	case IH_TYPE_STANDALONE:type = "Standalone Program";	break;
	case IH_TYPE_KERNEL:	type = "Kernel Image";		break;
	case IH_TYPE_RAMDISK:	type = "RAMDisk Image";		break;
	case IH_TYPE_MULTI:	type = "Multi-File Image";	break;
	case IH_TYPE_FIRMWARE:	type = "Firmware";		break;
	case IH_TYPE_SCRIPT:	type = "Script";		break;
	case IH_TYPE_FLATDT:	type = "Flat Device Tree";	break;
	default:		type = "Unknown Image";		break;
	}

	switch (hdr->ih_comp) {
	case IH_COMP_NONE:	comp = "uncompressed";		break;
	case IH_COMP_GZIP:	comp = "gzip compressed";	break;
	case IH_COMP_BZIP2:	comp = "bzip2 compressed";	break;
	default:		comp = "unknown compression";	break;
	}

	printf ("%s %s %s (%s)", arch, os, type, comp);
}

#define	ZALLOC_ALIGNMENT	16

static void *zalloc(void *x, unsigned items, unsigned size)
{
	void *p;

	size *= items;
	size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);

	p = malloc (size);

	return (p);
}

static void zfree(void *x, void *addr, unsigned nb)
{
	free (addr);
}

#define HEAD_CRC	2
#define EXTRA_FIELD	4
#define ORIG_NAME	8
#define COMMENT		0x10
#define RESERVED	0xe0

#define DEFLATED	8

int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
{
	z_stream s;
	int r, i, flags;

	/* skip header */
	i = 10;
	flags = src[3];
	if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
		puts ("Error: Bad gzipped data\n");
		return (-1);
	}
	if ((flags & EXTRA_FIELD) != 0)
		i = 12 + src[10] + (src[11] << 8);
	if ((flags & ORIG_NAME) != 0)
		while (src[i++] != 0)
			;
	if ((flags & COMMENT) != 0)
		while (src[i++] != 0)
			;
	if ((flags & HEAD_CRC) != 0)
		i += 2;
	if (i >= *lenp) {
		puts ("Error: gunzip out of data in header\n");
		return (-1);
	}

	s.zalloc = zalloc;
	s.zfree = zfree;
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
	s.outcb = (cb_func)WATCHDOG_RESET;
#else
	s.outcb = Z_NULL;
#endif	/* CONFIG_HW_WATCHDOG */

	r = inflateInit2(&s, -MAX_WBITS);
	if (r != Z_OK) {
		printf ("Error: inflateInit2() returned %d\n", r);
		return (-1);
	}
	s.next_in = src + i;
	s.avail_in = *lenp - i;
	s.next_out = dst;
	s.avail_out = dstlen;
	r = inflate(&s, Z_FINISH);
	if (r != Z_OK && r != Z_STREAM_END) {
		printf ("Error: inflate() returned %d\n", r);
		return (-1);
	}
	*lenp = s.next_out - (unsigned char *) dst;
	inflateEnd(&s);

	return (0);
}

#ifdef CONFIG_BZIP2
void bz_internal_error(int errcode)
{
	printf ("BZIP2 internal error %d\n", errcode);
}
#endif /* CONFIG_BZIP2 */

static void
do_bootm_rtems (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
		ulong addr, ulong *len_ptr, int verify)
{
	image_header_t *hdr = &header;
	void	(*entry_point)(bd_t *);

	entry_point = (void (*)(bd_t *)) ntohl(hdr->ih_ep);

	printf ("## Transferring control to RTEMS (at address %08lx) ...\n",
		(ulong)entry_point);

	SHOW_BOOT_PROGRESS (15);

	/*
	 * RTEMS Parameters:
	 *   r3: ptr to board info data
	 */

	(*entry_point ) ( gd->bd );
}

#if (CONFIG_COMMANDS & CFG_CMD_ELF)
static void
do_bootm_vxworks (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
		  ulong addr, ulong *len_ptr, int verify)
{
	image_header_t *hdr = &header;
	char str[80];

	sprintf(str, "%x", ntohl(hdr->ih_ep)); /* write entry-point into string */
	setenv("loadaddr", str);
	do_bootvx(cmdtp, 0, 0, NULL);
}

static void
do_bootm_qnxelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
		 ulong addr, ulong *len_ptr, int verify)
{
	image_header_t *hdr = &header;
	char *local_args[2];
	char str[16];

	sprintf(str, "%x", ntohl(hdr->ih_ep)); /* write entry-point into string */
	local_args[0] = argv[0];
	local_args[1] = str;	/* and provide it via the arguments */
	do_bootelf(cmdtp, 0, 2, local_args);
}
#endif /* CFG_CMD_ELF */

#ifdef CONFIG_LYNXKDI
static void
do_bootm_lynxkdi (cmd_tbl_t *cmdtp, int flag,
		 int	argc, char *argv[],
		 ulong	addr,
		 ulong	*len_ptr,
		 int	verify)
{
	lynxkdi_boot( &header );
}

#endif /* CONFIG_LYNXKDI */