summaryrefslogtreecommitdiff
path: root/common/cmd_bootm.c
blob: 2b4df80f9908e9f1735a75ab2e3a9b14c5a9edef (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
/*
 * (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 <lmb.h>
#include <asm/byteorder.h>

#if defined(CONFIG_CMD_USB)
#include <usb.h>
#endif

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

#if defined(CONFIG_OF_LIBFDT)
#include <fdt.h>
#include <libfdt.h>
#include <fdt_support.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

extern int gunzip (void *dst, int dstlen, unsigned char *src, unsigned long *lenp);
#ifndef CFG_BOOTM_LEN
#define CFG_BOOTM_LEN	0x800000	/* use 8MByte as default max gunzip size */
#endif

#ifdef CONFIG_BZIP2
extern void bz_internal_error(int);
#endif

#if defined(CONFIG_CMD_IMI)
static int image_info (unsigned long addr);
#endif

#if defined(CONFIG_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

#ifdef CONFIG_SILENT_CONSOLE
static void fixup_silent_linux (void);
#endif

static image_header_t *image_get_kernel (ulong img_addr, int verify);
#if defined(CONFIG_FIT)
static int fit_check_kernel (const void *fit, int os_noffset, int verify);
#endif

static void *boot_get_kernel (cmd_tbl_t *cmdtp, int flag,int argc, char *argv[],
		bootm_headers_t *images, ulong *os_data, ulong *os_len);
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);

/*
 *  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 int boot_os_fn (int flag, int argc, char *argv[],
			bootm_headers_t *images); /* pointers to os/initrd/fdt */

extern boot_os_fn do_bootm_linux;
static boot_os_fn do_bootm_netbsd;
#if defined(CONFIG_LYNXKDI)
static boot_os_fn do_bootm_lynxkdi;
extern void lynxkdi_boot (image_header_t *);
#endif
static boot_os_fn do_bootm_rtems;
#if defined(CONFIG_CMD_ELF)
static boot_os_fn do_bootm_vxworks;
static boot_os_fn 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
#if defined(CONFIG_INTEGRITY)
static boot_os_fn do_bootm_integrity;
#endif

ulong load_addr = CFG_LOAD_ADDR;	/* Default Load Address */
static bootm_headers_t images;		/* pointers to os/initrd/fdt images */

void __board_lmb_reserve(struct lmb *lmb)
{
	/* please define platform specific board_lmb_reserve() */
}
void board_lmb_reserve(struct lmb *lmb) __attribute__((weak, alias("__board_lmb_reserve")));

#if defined(__ARM__)
  #define IH_INITRD_ARCH IH_ARCH_ARM
#elif defined(__avr32__)
  #define IH_INITRD_ARCH IH_ARCH_AVR32
#elif defined(__bfin__)
  #define IH_INITRD_ARCH IH_ARCH_BLACKFIN
#elif defined(__I386__)
  #define IH_INITRD_ARCH IH_ARCH_I386
#elif defined(__M68K__)
  #define IH_INITRD_ARCH IH_ARCH_M68K
#elif defined(__microblaze__)
  #define IH_INITRD_ARCH IH_ARCH_MICROBLAZE
#elif defined(__mips__)
  #define IH_INITRD_ARCH IH_ARCH_MIPS
#elif defined(__nios__)
  #define IH_INITRD_ARCH IH_ARCH_NIOS
#elif defined(__nios2__)
  #define IH_INITRD_ARCH IH_ARCH_NIOS2
#elif defined(__PPC__)
  #define IH_INITRD_ARCH IH_ARCH_PPC
#elif defined(__sh__)
  #define IH_INITRD_ARCH IH_ARCH_SH
#elif defined(__sparc__)
  #define IH_INITRD_ARCH IH_ARCH_SPARC
#else
# error Unknown CPU type
#endif

static int bootm_start(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	ulong		mem_start;
	phys_size_t	mem_size;
	void		*os_hdr;
	int		ret;

	memset ((void *)&images, 0, sizeof (images));
	images.verify = getenv_yesno ("verify");

	lmb_init(&images.lmb);

	mem_start = getenv_bootm_low();
	mem_size = getenv_bootm_size();

	lmb_add(&images.lmb, (phys_addr_t)mem_start, mem_size);

	board_lmb_reserve(&images.lmb);

	/* get kernel image header, start address and length */
	os_hdr = boot_get_kernel (cmdtp, flag, argc, argv,
			&images, &images.os.image_start, &images.os.image_len);
	if (images.os.image_len == 0) {
		puts ("ERROR: can't get kernel image!\n");
		return 1;
	}

	/* get image parameters */
	switch (genimg_get_format (os_hdr)) {
	case IMAGE_FORMAT_LEGACY:
		images.os.type = image_get_type (os_hdr);
		images.os.comp = image_get_comp (os_hdr);
		images.os.os = image_get_os (os_hdr);

		images.os.end = image_get_image_end (os_hdr);
		images.os.load = image_get_load (os_hdr);
		break;
#if defined(CONFIG_FIT)
	case IMAGE_FORMAT_FIT:
		if (fit_image_get_type (images.fit_hdr_os,
					images.fit_noffset_os, &images.os.type)) {
			puts ("Can't get image type!\n");
			show_boot_progress (-109);
			return 1;
		}

		if (fit_image_get_comp (images.fit_hdr_os,
					images.fit_noffset_os, &images.os.comp)) {
			puts ("Can't get image compression!\n");
			show_boot_progress (-110);
			return 1;
		}

		if (fit_image_get_os (images.fit_hdr_os,
					images.fit_noffset_os, &images.os.os)) {
			puts ("Can't get image OS!\n");
			show_boot_progress (-111);
			return 1;
		}

		images.os.end = fit_get_end (images.fit_hdr_os);

		if (fit_image_get_load (images.fit_hdr_os, images.fit_noffset_os,
					&images.os.load)) {
			puts ("Can't get image load address!\n");
			show_boot_progress (-112);
			return 1;
		}
		break;
#endif
	default:
		puts ("ERROR: unknown image format type!\n");
		return 1;
	}

	/* find kernel entry point */
	if (images.legacy_hdr_valid) {
		images.ep = image_get_ep (&images.legacy_hdr_os_copy);
#if defined(CONFIG_FIT)
	} else if (images.fit_uname_os) {
		ret = fit_image_get_entry (images.fit_hdr_os,
				images.fit_noffset_os, &images.ep);
		if (ret) {
			puts ("Can't get entry point property!\n");
			return 1;
		}
#endif
	} else {
		puts ("Could not find kernel entry point!\n");
		return 1;
	}

	if (images.os.os == IH_OS_LINUX) {
		/* find ramdisk */
		ret = boot_get_ramdisk (argc, argv, &images, IH_INITRD_ARCH,
				&images.rd_start, &images.rd_end);
		if (ret) {
			puts ("Ramdisk image is corrupt or invalid\n");
			return 1;
		}

#if defined(CONFIG_OF_LIBFDT)
#if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_SPARC)
		/* find flattened device tree */
		ret = boot_get_fdt (flag, argc, argv, &images,
				    &images.ft_addr, &images.ft_len);
		if (ret) {
			puts ("Could not find a valid device tree\n");
			return 1;
		}

		set_working_fdt_addr(images.ft_addr);
#endif
#endif
	}

	images.os.start = (ulong)os_hdr;
	images.valid = 1;

	return 0;
}

#define BOOTM_ERR_RESET		-1
#define BOOTM_ERR_OVERLAP	-2
#define BOOTM_ERR_UNIMPLEMENTED	-3
static int bootm_load_os(image_info_t os, ulong *load_end, int boot_progress)
{
	uint8_t comp = os.comp;
	ulong load = os.load;
	ulong blob_start = os.start;
	ulong blob_end = os.end;
	ulong image_start = os.image_start;
	ulong image_len = os.image_len;
	uint unc_len = CFG_BOOTM_LEN;

	const char *type_name = genimg_get_type_name (os.type);

	switch (comp) {
	case IH_COMP_NONE:
		if (load == blob_start) {
			printf ("   XIP %s ... ", type_name);
		} else {
			printf ("   Loading %s ... ", type_name);

			memmove_wd ((void *)load,
				   (void *)image_start, image_len, CHUNKSZ);
		}
		*load_end = load + image_len;
		puts("OK\n");
		break;
	case IH_COMP_GZIP:
		printf ("   Uncompressing %s ... ", type_name);
		if (gunzip ((void *)load, unc_len,
					(uchar *)image_start, &image_len) != 0) {
			puts ("GUNZIP: uncompress or overwrite error "
				"- must RESET board to recover\n");
			if (boot_progress)
				show_boot_progress (-6);
			return BOOTM_ERR_RESET;
		}

		*load_end = load + image_len;
		break;
#ifdef CONFIG_BZIP2
	case IH_COMP_BZIP2:
		printf ("   Uncompressing %s ... ", type_name);
		/*
		 * If we've got less than 4 MB of malloc() space,
		 * use slower decompression algorithm which requires
		 * at most 2300 KB of memory.
		 */
		int i = BZ2_bzBuffToBuffDecompress ((char*)load,
					&unc_len, (char *)image_start, image_len,
					CFG_MALLOC_LEN < (4096 * 1024), 0);
		if (i != BZ_OK) {
			printf ("BUNZIP2: uncompress or overwrite error %d "
				"- must RESET board to recover\n", i);
			if (boot_progress)
				show_boot_progress (-6);
			return BOOTM_ERR_RESET;
		}

		*load_end = load + unc_len;
		break;
#endif /* CONFIG_BZIP2 */
	default:
		printf ("Unimplemented compression type %d\n", comp);
		return BOOTM_ERR_UNIMPLEMENTED;
	}
	puts ("OK\n");
	debug ("   kernel loaded at 0x%08lx, end = 0x%8p\n", load, load_end);
	if (boot_progress)
		show_boot_progress (7);

	if ((load < blob_end) && (*load_end > blob_start)) {
		debug ("images.os.start = 0x%lX, images.os.end = 0x%lx\n", blob_start, blob_end);
		debug ("images.os.load = 0x%lx, load_end = 0x%p\n", load, load_end);

		return BOOTM_ERR_OVERLAP;
	}

	return 0;
}

/*******************************************************************/
/* bootm - boot application image from image in memory */
/*******************************************************************/
int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{

	ulong		iflag;
	ulong		load_end = 0;
	int		ret;

	if (bootm_start(cmdtp, flag, argc, argv))
		return 1;

	/*
	 * 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();

#if defined(CONFIG_CMD_USB)
	/*
	 * turn off USB to prevent the host controller from writing to the
	 * SDRAM while Linux is booting. This could happen (at least for OHCI
	 * controller), because the HCCA (Host Controller Communication Area)
	 * lies within the SDRAM and the host controller writes continously to
	 * this area (as busmaster!). The HccaFrameNumber is for example
	 * updated every 1 ms within the HCCA structure in SDRAM! For more
	 * details see the OpenHCI specification.
	 */
	usb_stop();
#endif

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

	ret = bootm_load_os(images.os, &load_end, 1);

	if (ret < 0) {
		if (ret == BOOTM_ERR_RESET)
			do_reset (cmdtp, flag, argc, argv);
		if (ret == BOOTM_ERR_OVERLAP) {
			if (images.legacy_hdr_valid) {
				if (image_get_type (&images.legacy_hdr_os_copy) == IH_TYPE_MULTI)
					puts ("WARNING: legacy format multi component "
						"image overwritten\n");
			} else {
				puts ("ERROR: new format image overwritten - "
					"must RESET the board to recover\n");
				show_boot_progress (-113);
				do_reset (cmdtp, flag, argc, argv);
			}
		}
		if (ret == BOOTM_ERR_UNIMPLEMENTED) {
			if (iflag)
				enable_interrupts();
			show_boot_progress (-7);
			return 1;
		}
	}

	lmb_reserve(&images.lmb, images.os.load, (load_end - images.os.load));

	show_boot_progress (8);

	switch (images.os.os) {
	default:			/* handled by (original) Linux case */
	case IH_OS_LINUX:
#ifdef CONFIG_SILENT_CONSOLE
	    fixup_silent_linux();
#endif
	    do_bootm_linux (0, argc, argv, &images);
	    break;

	case IH_OS_NETBSD:
	    do_bootm_netbsd (0, argc, argv, &images);
	    break;

#ifdef CONFIG_LYNXKDI
	case IH_OS_LYNXOS:
	    do_bootm_lynxkdi (0, argc, argv, &images);
	    break;
#endif

	case IH_OS_RTEMS:
	    do_bootm_rtems (0, argc, argv, &images);
	    break;

#if defined(CONFIG_CMD_ELF)
	case IH_OS_VXWORKS:
	    do_bootm_vxworks (0, argc, argv, &images);
	    break;

	case IH_OS_QNX:
	    do_bootm_qnxelf (0, argc, argv, &images);
	    break;
#endif

#ifdef CONFIG_INTEGRITY
	case IH_OS_INTEGRITY:
	    do_bootm_integrity (0, argc, argv, &images);
	    break;
#endif
	}

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

	return 1;
}

/**
 * image_get_kernel - verify legacy format kernel image
 * @img_addr: in RAM address of the legacy format image to be verified
 * @verify: data CRC verification flag
 *
 * image_get_kernel() verifies legacy image integrity and returns pointer to
 * legacy image header if image verification was completed successfully.
 *
 * returns:
 *     pointer to a legacy image header if valid image was found
 *     otherwise return NULL
 */
static image_header_t *image_get_kernel (ulong img_addr, int verify)
{
	image_header_t *hdr = (image_header_t *)img_addr;

	if (!image_check_magic(hdr)) {
		puts ("Bad Magic Number\n");
		show_boot_progress (-1);
		return NULL;
	}
	show_boot_progress (2);

	if (!image_check_hcrc (hdr)) {
		puts ("Bad Header Checksum\n");
		show_boot_progress (-2);
		return NULL;
	}

	show_boot_progress (3);
	image_print_contents (hdr);

	if (verify) {
		puts ("   Verifying Checksum ... ");
		if (!image_check_dcrc (hdr)) {
			printf ("Bad Data CRC\n");
			show_boot_progress (-3);
			return NULL;
		}
		puts ("OK\n");
	}
	show_boot_progress (4);

	if (!image_check_target_arch (hdr)) {
		printf ("Unsupported Architecture 0x%x\n", image_get_arch (hdr));
		show_boot_progress (-4);
		return NULL;
	}
	return hdr;
}

/**
 * fit_check_kernel - verify FIT format kernel subimage
 * @fit_hdr: pointer to the FIT image header
 * os_noffset: kernel subimage node offset within FIT image
 * @verify: data CRC verification flag
 *
 * fit_check_kernel() verifies integrity of the kernel subimage and from
 * specified FIT image.
 *
 * returns:
 *     1, on success
 *     0, on failure
 */
#if defined (CONFIG_FIT)
static int fit_check_kernel (const void *fit, int os_noffset, int verify)
{
	fit_image_print (fit, os_noffset, "   ");

	if (verify) {
		puts ("   Verifying Hash Integrity ... ");
		if (!fit_image_check_hashes (fit, os_noffset)) {
			puts ("Bad Data Hash\n");
			show_boot_progress (-104);
			return 0;
		}
		puts ("OK\n");
	}
	show_boot_progress (105);

	if (!fit_image_check_target_arch (fit, os_noffset)) {
		puts ("Unsupported Architecture\n");
		show_boot_progress (-105);
		return 0;
	}

	show_boot_progress (106);
	if (!fit_image_check_type (fit, os_noffset, IH_TYPE_KERNEL)) {
		puts ("Not a kernel image\n");
		show_boot_progress (-106);
		return 0;
	}

	show_boot_progress (107);
	return 1;
}
#endif /* CONFIG_FIT */

/**
 * boot_get_kernel - find kernel image
 * @os_data: pointer to a ulong variable, will hold os data start address
 * @os_len: pointer to a ulong variable, will hold os data length
 *
 * boot_get_kernel() tries to find a kernel image, verifies its integrity
 * and locates kernel data.
 *
 * returns:
 *     pointer to image header if valid image was found, plus kernel start
 *     address and length, otherwise NULL
 */
static void *boot_get_kernel (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
		bootm_headers_t *images, ulong *os_data, ulong *os_len)
{
	image_header_t	*hdr;
	ulong		img_addr;
#if defined(CONFIG_FIT)
	void		*fit_hdr;
	const char	*fit_uname_config = NULL;
	const char	*fit_uname_kernel = NULL;
	const void	*data;
	size_t		len;
	int		cfg_noffset;
	int		os_noffset;
#endif

	/* find out kernel image address */
	if (argc < 2) {
		img_addr = load_addr;
		debug ("*  kernel: default image load address = 0x%08lx\n",
				load_addr);
#if defined(CONFIG_FIT)
	} else if (fit_parse_conf (argv[1], load_addr, &img_addr,
							&fit_uname_config)) {
		debug ("*  kernel: config '%s' from image at 0x%08lx\n",
				fit_uname_config, img_addr);
	} else if (fit_parse_subimage (argv[1], load_addr, &img_addr,
							&fit_uname_kernel)) {
		debug ("*  kernel: subimage '%s' from image at 0x%08lx\n",
				fit_uname_kernel, img_addr);
#endif
	} else {
		img_addr = simple_strtoul(argv[1], NULL, 16);
		debug ("*  kernel: cmdline image address = 0x%08lx\n", img_addr);
	}

	show_boot_progress (1);

	/* copy from dataflash if needed */
	img_addr = genimg_get_image (img_addr);

	/* check image type, for FIT images get FIT kernel node */
	*os_data = *os_len = 0;
	switch (genimg_get_format ((void *)img_addr)) {
	case IMAGE_FORMAT_LEGACY:
		printf ("## Booting kernel from Legacy Image at %08lx ...\n",
				img_addr);
		hdr = image_get_kernel (img_addr, images->verify);
		if (!hdr)
			return NULL;
		show_boot_progress (5);

		/* get os_data and os_len */
		switch (image_get_type (hdr)) {
		case IH_TYPE_KERNEL:
			*os_data = image_get_data (hdr);
			*os_len = image_get_data_size (hdr);
			break;
		case IH_TYPE_MULTI:
			image_multi_getimg (hdr, 0, os_data, os_len);
			break;
		default:
			printf ("Wrong Image Type for %s command\n", cmdtp->name);
			show_boot_progress (-5);
			return NULL;
		}

		/*
		 * copy image header to allow for image overwrites during kernel
		 * decompression.
		 */
		memmove (&images->legacy_hdr_os_copy, hdr, sizeof(image_header_t));

		/* save pointer to image header */
		images->legacy_hdr_os = hdr;

		images->legacy_hdr_valid = 1;
		show_boot_progress (6);
		break;
#if defined(CONFIG_FIT)
	case IMAGE_FORMAT_FIT:
		fit_hdr = (void *)img_addr;
		printf ("## Booting kernel from FIT Image at %08lx ...\n",
				img_addr);

		if (!fit_check_format (fit_hdr)) {
			puts ("Bad FIT kernel image format!\n");
			show_boot_progress (-100);
			return NULL;
		}
		show_boot_progress (100);

		if (!fit_uname_kernel) {
			/*
			 * no kernel image node unit name, try to get config
			 * node first. If config unit node name is NULL
			 * fit_conf_get_node() will try to find default config node
			 */
			show_boot_progress (101);
			cfg_noffset = fit_conf_get_node (fit_hdr, fit_uname_config);
			if (cfg_noffset < 0) {
				show_boot_progress (-101);
				return NULL;
			}
			/* save configuration uname provided in the first
			 * bootm argument
			 */
			images->fit_uname_cfg = fdt_get_name (fit_hdr, cfg_noffset, NULL);
			printf ("   Using '%s' configuration\n", images->fit_uname_cfg);
			show_boot_progress (103);

			os_noffset = fit_conf_get_kernel_node (fit_hdr, cfg_noffset);
			fit_uname_kernel = fit_get_name (fit_hdr, os_noffset, NULL);
		} else {
			/* get kernel component image node offset */
			show_boot_progress (102);
			os_noffset = fit_image_get_node (fit_hdr, fit_uname_kernel);
		}
		if (os_noffset < 0) {
			show_boot_progress (-103);
			return NULL;
		}

		printf ("   Trying '%s' kernel subimage\n", fit_uname_kernel);

		show_boot_progress (104);
		if (!fit_check_kernel (fit_hdr, os_noffset, images->verify))
			return NULL;

		/* get kernel image data address and length */
		if (fit_image_get_data (fit_hdr, os_noffset, &data, &len)) {
			puts ("Could not find kernel subimage data!\n");
			show_boot_progress (-107);
			return NULL;
		}
		show_boot_progress (108);

		*os_len = len;
		*os_data = (ulong)data;
		images->fit_hdr_os = fit_hdr;
		images->fit_uname_os = fit_uname_kernel;
		images->fit_noffset_os = os_noffset;
		break;
#endif
	default:
		printf ("Wrong Image Format for %s command\n", cmdtp->name);
		show_boot_progress (-108);
		return NULL;
	}

	debug ("   kernel data at 0x%08lx, len = 0x%08lx (%ld)\n",
			*os_data, *os_len, *os_len);

	return (void *)img_addr;
}

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"
#if defined(CONFIG_OF_LIBFDT)
	"\tWhen booting a Linux kernel which requires a flat device-tree\n"
	"\ta third argument is required which is the address 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
#if defined(CONFIG_FIT)
	"\t\nFor the new multi component uImage format (FIT) addresses\n"
	"\tmust be extened to include component or configuration unit name:\n"
	"\taddr:<subimg_uname> - direct component image specification\n"
	"\taddr#<conf_uname>   - configuration specification\n"
	"\tUse iminfo command to get the list of existing component\n"
	"\timages and configurations.\n"
#endif
);

/*******************************************************************/
/* bootd - boot default image */
/*******************************************************************/
#if defined(CONFIG_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


/*******************************************************************/
/* iminfo - print header info for a requested image */
/*******************************************************************/
#if defined(CONFIG_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)
{
	void *hdr = (void *)addr;

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

	switch (genimg_get_format (hdr)) {
	case IMAGE_FORMAT_LEGACY:
		puts ("   Legacy image found\n");
		if (!image_check_magic (hdr)) {
			puts ("   Bad Magic Number\n");
			return 1;
		}

		if (!image_check_hcrc (hdr)) {
			puts ("   Bad Header Checksum\n");
			return 1;
		}

		image_print_contents (hdr);

		puts ("   Verifying Checksum ... ");
		if (!image_check_dcrc (hdr)) {
			puts ("   Bad Data CRC\n");
			return 1;
		}
		puts ("OK\n");
		return 0;
#if defined(CONFIG_FIT)
	case IMAGE_FORMAT_FIT:
		puts ("   FIT image found\n");

		if (!fit_check_format (hdr)) {
			puts ("Bad FIT image format!\n");
			return 1;
		}

		fit_print_contents (hdr);

		if (!fit_all_image_check_hashes (hdr)) {
			puts ("Bad hash in FIT image!\n");
			return 1;
		}

		return 0;
#endif
	default:
		puts ("Unknown image format!\n");
		break;
	}

	return 1;
}

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


/*******************************************************************/
/* imls - list all images found in flash */
/*******************************************************************/
#if defined(CONFIG_CMD_IMLS)
int do_imls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	flash_info_t *info;
	int i, j;
	void *hdr;

	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) {

			hdr = (void *)info->start[j];
			if (!hdr)
				goto next_sector;

			switch (genimg_get_format (hdr)) {
			case IMAGE_FORMAT_LEGACY:
				if (!image_check_hcrc (hdr))
					goto next_sector;

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

				puts ("   Verifying Checksum ... ");
				if (!image_check_dcrc (hdr)) {
					puts ("Bad Data CRC\n");
				} else {
					puts ("OK\n");
				}
				break;
#if defined(CONFIG_FIT)
			case IMAGE_FORMAT_FIT:
				if (!fit_check_format (hdr))
					goto next_sector;

				printf ("FIT Image at %08lX:\n", (ulong)hdr);
				fit_print_contents (hdr);
				break;
#endif
			default:
				goto next_sector;
			}

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

/*******************************************************************/
/* helper routines */
/*******************************************************************/
#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 */


/*******************************************************************/
/* OS booting routines */
/*******************************************************************/

static int do_bootm_netbsd (int flag, int argc, char *argv[],
			    bootm_headers_t *images)
{
	void (*loader)(bd_t *, image_header_t *, char *, char *);
	image_header_t *os_hdr, *hdr;
	ulong kernel_data, kernel_len;
	char *consdev;
	char *cmdline;

#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
		fit_unsupported_reset ("NetBSD");
		return 1;
	}
#endif
	hdr = images->legacy_hdr_os;

	/*
	 * 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.
	 */
	os_hdr = NULL;
	if (image_check_type (&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) {
		image_multi_getimg (hdr, 1, &kernel_data, &kernel_len);
		if (kernel_len)
			os_hdr = hdr;
	}

	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 *))images->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, os_hdr, consdev, cmdline);

	return 1;
}

#ifdef CONFIG_LYNXKDI
static int do_bootm_lynxkdi (int flag, int argc, char *argv[],
			     bootm_headers_t *images)
{
	image_header_t *hdr = &images->legacy_hdr_os_copy;

#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
		fit_unsupported_reset ("Lynx");
		return 1;
	}
#endif

	lynxkdi_boot ((image_header_t *)hdr);

	return 1;
}
#endif /* CONFIG_LYNXKDI */

static int do_bootm_rtems (int flag, int argc, char *argv[],
			   bootm_headers_t *images)
{
	void (*entry_point)(bd_t *);

#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
		fit_unsupported_reset ("RTEMS");
		return 1;
	}
#endif

	entry_point = (void (*)(bd_t *))images->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);

	return 1;
}

#if defined(CONFIG_CMD_ELF)
static int do_bootm_vxworks (int flag, int argc, char *argv[],
			     bootm_headers_t *images)
{
	char str[80];

#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
		fit_unsupported_reset ("VxWorks");
		return 1;
	}
#endif

	sprintf(str, "%lx", images->ep); /* write entry-point into string */
	setenv("loadaddr", str);
	do_bootvx(NULL, 0, 0, NULL);

	return 1;
}

static int do_bootm_qnxelf(int flag, int argc, char *argv[],
			    bootm_headers_t *images)
{
	char *local_args[2];
	char str[16];

#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
		fit_unsupported_reset ("QNX");
		return 1;
	}
#endif

	sprintf(str, "%lx", images->ep); /* write entry-point into string */
	local_args[0] = argv[0];
	local_args[1] = str;	/* and provide it via the arguments */
	do_bootelf(NULL, 0, 2, local_args);

	return 1;
}
#endif

#ifdef CONFIG_INTEGRITY
static int do_bootm_integrity (int flag, int argc, char *argv[],
			   bootm_headers_t *images)
{
	void (*entry_point)(void);

#if defined(CONFIG_FIT)
	if (!images->legacy_hdr_valid) {
		fit_unsupported_reset ("INTEGRITY");
		return 1;
	}
#endif

	entry_point = (void (*)(void))images->ep;

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

	show_boot_progress (15);

	/*
	 * INTEGRITY Parameters:
	 *   None
	 */
	(*entry_point)();

	return 1;
}
#endif