aboutsummaryrefslogtreecommitdiff
path: root/common/bootm.c
blob: ff81a271a559232c07e3f7c1cbebc4bf327731c3 (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
/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef USE_HOSTCC
#include <common.h>
#include <bootstage.h>
#include <bzlib.h>
#include <fdt_support.h>
#include <lmb.h>
#include <malloc.h>
#include <asm/io.h>
#include <linux/lzo.h>
#include <lzma/LzmaTypes.h>
#include <lzma/LzmaDec.h>
#include <lzma/LzmaTools.h>
#if defined(CONFIG_CMD_USB)
#include <usb.h>
#endif
#else
#include "mkimage.h"
#endif

#include <command.h>
#include <bootm.h>
#include <image.h>

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

#define IH_INITRD_ARCH IH_ARCH_DEFAULT

#ifndef USE_HOSTCC

DECLARE_GLOBAL_DATA_PTR;

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

#ifdef CONFIG_LMB
static void boot_start_lmb(bootm_headers_t *images)
{
	ulong		mem_start;
	phys_size_t	mem_size;

	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);

	arch_lmb_reserve(&images->lmb);
	board_lmb_reserve(&images->lmb);
}
#else
#define lmb_reserve(lmb, base, size)
static inline void boot_start_lmb(bootm_headers_t *images) { }
#endif

static int bootm_start(cmd_tbl_t *cmdtp, int flag, int argc,
		       char * const argv[])
{
	memset((void *)&images, 0, sizeof(images));
	images.verify = getenv_yesno("verify");

	boot_start_lmb(&images);

	bootstage_mark_name(BOOTSTAGE_ID_BOOTM_START, "bootm_start");
	images.state = BOOTM_STATE_START;

	return 0;
}

static int bootm_find_os(cmd_tbl_t *cmdtp, int flag, int argc,
			 char * const argv[])
{
	const void *os_hdr;
	bool ep_found = false;

	/* 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)) {
#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
	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;
#endif
#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");
			bootstage_error(BOOTSTAGE_ID_FIT_TYPE);
			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");
			bootstage_error(BOOTSTAGE_ID_FIT_COMPRESSION);
			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");
			bootstage_error(BOOTSTAGE_ID_FIT_OS);
			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");
			bootstage_error(BOOTSTAGE_ID_FIT_LOADADDR);
			return 1;
		}
		break;
#endif
#ifdef CONFIG_ANDROID_BOOT_IMAGE
	case IMAGE_FORMAT_ANDROID:
		images.os.type = IH_TYPE_KERNEL;
		images.os.comp = IH_COMP_NONE;
		images.os.os = IH_OS_LINUX;
		images.ep = images.os.load;
		ep_found = true;

		images.os.end = android_image_get_end(os_hdr);
		images.os.load = android_image_get_kload(os_hdr);
		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) {
		int ret;

		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 if (!ep_found) {
		puts("Could not find kernel entry point!\n");
		return 1;
	}

	if (images.os.type == IH_TYPE_KERNEL_NOLOAD) {
		images.os.load = images.os.image_start;
		images.ep += images.os.load;
	}

	images.os.start = (ulong)os_hdr;

	return 0;
}

static int bootm_find_ramdisk(int flag, int argc, char * const argv[])
{
	int ret;

	/* 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;
	}

	return 0;
}

#if defined(CONFIG_OF_LIBFDT)
static int bootm_find_fdt(int flag, int argc, char * const argv[])
{
	int ret;

	/* find flattened device tree */
	ret = boot_get_fdt(flag, argc, argv, IH_ARCH_DEFAULT, &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);

	return 0;
}
#endif

int bootm_find_ramdisk_fdt(int flag, int argc, char * const argv[])
{
	if (bootm_find_ramdisk(flag, argc, argv))
		return 1;

#if defined(CONFIG_OF_LIBFDT)
	if (bootm_find_fdt(flag, argc, argv))
		return 1;
#endif

	return 0;
}

static int bootm_find_other(cmd_tbl_t *cmdtp, int flag, int argc,
			    char * const argv[])
{
	if (((images.os.type == IH_TYPE_KERNEL) ||
	     (images.os.type == IH_TYPE_KERNEL_NOLOAD) ||
	     (images.os.type == IH_TYPE_MULTI)) &&
	    (images.os.os == IH_OS_LINUX ||
		 images.os.os == IH_OS_VXWORKS))
		return bootm_find_ramdisk_fdt(flag, argc, argv);

	return 0;
}
#endif /* USE_HOSTCC */

/**
 * decomp_image() - decompress the operating system
 *
 * @comp:	Compression algorithm that is used (IH_COMP_...)
 * @load:	Destination load address in U-Boot memory
 * @image_start Image start address (where we are decompressing from)
 * @type:	OS type (IH_OS_...)
 * @load_bug:	Place to decompress to
 * @image_buf:	Address to decompress from
 * @return 0 if OK, -ve on error (BOOTM_ERR_...)
 */
static int decomp_image(int comp, ulong load, ulong image_start, int type,
			void *load_buf, void *image_buf, ulong image_len,
			ulong *load_end)
{
	const char *type_name = genimg_get_type_name(type);
	__attribute__((unused)) uint unc_len = CONFIG_SYS_BOOTM_LEN;

	*load_end = load;
	switch (comp) {
	case IH_COMP_NONE:
		if (load == image_start) {
			printf("   XIP %s ... ", type_name);
		} else {
			printf("   Loading %s ... ", type_name);
			memmove_wd(load_buf, image_buf, image_len, CHUNKSZ);
		}
		*load_end = load + image_len;
		break;
#ifdef CONFIG_GZIP
	case IH_COMP_GZIP:
		printf("   Uncompressing %s ... ", type_name);
		if (gunzip(load_buf, unc_len, image_buf, &image_len) != 0) {
			puts("GUNZIP: uncompress, out-of-mem or overwrite error - must RESET board to recover\n");
			return BOOTM_ERR_RESET;
		}

		*load_end = load + image_len;
		break;
#endif /* CONFIG_GZIP */
#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(load_buf, &unc_len,
			image_buf, image_len,
			CONFIG_SYS_MALLOC_LEN < (4096 * 1024), 0);
		if (i != BZ_OK) {
			printf("BUNZIP2: uncompress or overwrite error %d - must RESET board to recover\n",
			       i);
			return BOOTM_ERR_RESET;
		}

		*load_end = load + unc_len;
		break;
#endif /* CONFIG_BZIP2 */
#ifdef CONFIG_LZMA
	case IH_COMP_LZMA: {
		SizeT lzma_len = unc_len;
		int ret;

		printf("   Uncompressing %s ... ", type_name);

		ret = lzmaBuffToBuffDecompress(load_buf, &lzma_len,
					       image_buf, image_len);
		unc_len = lzma_len;
		if (ret != SZ_OK) {
			printf("LZMA: uncompress or overwrite error %d - must RESET board to recover\n",
			       ret);
			bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
			return BOOTM_ERR_RESET;
		}
		*load_end = load + unc_len;
		break;
	}
#endif /* CONFIG_LZMA */
#ifdef CONFIG_LZO
	case IH_COMP_LZO: {
		size_t size = unc_len;
		int ret;

		printf("   Uncompressing %s ... ", type_name);

		ret = lzop_decompress(image_buf, image_len, load_buf, &size);
		if (ret != LZO_E_OK) {
			printf("LZO: uncompress or overwrite error %d - must RESET board to recover\n",
			       ret);
			return BOOTM_ERR_RESET;
		}

		*load_end = load + size;
		break;
	}
#endif /* CONFIG_LZO */
	default:
		printf("Unimplemented compression type %d\n", comp);
		return BOOTM_ERR_UNIMPLEMENTED;
	}

	puts("OK\n");

	return 0;
}

#ifndef USE_HOSTCC
static int bootm_load_os(bootm_headers_t *images, unsigned long *load_end,
			 int boot_progress)
{
	image_info_t os = images->os;
	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;
	bool no_overlap;
	void *load_buf, *image_buf;
	int err;

	load_buf = map_sysmem(load, 0);
	image_buf = map_sysmem(os.image_start, image_len);
	err = decomp_image(os.comp, load, os.image_start, os.type, load_buf,
			   image_buf, image_len, load_end);
	if (err) {
		bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
		return err;
	}
	flush_cache(load, (*load_end - load) * sizeof(ulong));

	debug("   kernel loaded at 0x%08lx, end = 0x%08lx\n", load, *load_end);
	bootstage_mark(BOOTSTAGE_ID_KERNEL_LOADED);

	no_overlap = (os.comp == IH_COMP_NONE && load == image_start);

	if (!no_overlap && (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%lx\n", load,
		      *load_end);

		/* Check what type of image this is. */
		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");
			return BOOTM_ERR_OVERLAP;
		} else {
			puts("ERROR: new format image overwritten - must RESET the board to recover\n");
			bootstage_error(BOOTSTAGE_ID_OVERWRITTEN);
			return BOOTM_ERR_RESET;
		}
	}

	return 0;
}

/**
 * bootm_disable_interrupts() - Disable interrupts in preparation for load/boot
 *
 * @return interrupt flag (0 if interrupts were disabled, non-zero if they were
 *	enabled)
 */
ulong bootm_disable_interrupts(void)
{
	ulong iflag;

	/*
	 * 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_NETCONSOLE
	/* Stop the ethernet stack if NetConsole could have left it up */
	eth_halt();
	eth_unregister(eth_get_dev());
#endif

#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
	return iflag;
}

#if defined(CONFIG_SILENT_CONSOLE) && !defined(CONFIG_SILENT_U_BOOT_ONLY)

#define CONSOLE_ARG     "console="
#define CONSOLE_ARG_LEN (sizeof(CONSOLE_ARG) - 1)

static void fixup_silent_linux(void)
{
	char *buf;
	const char *env_val;
	char *cmdline = getenv("bootargs");
	int want_silent;

	/*
	 * Only fix cmdline when requested. The environment variable can be:
	 *
	 *	no - we never fixup
	 *	yes - we always fixup
	 *	unset - we rely on the console silent flag
	 */
	want_silent = getenv_yesno("silent_linux");
	if (want_silent == 0)
		return;
	else if (want_silent == -1 && !(gd->flags & GD_FLG_SILENT))
		return;

	debug("before silent fix-up: %s\n", cmdline);
	if (cmdline && (cmdline[0] != '\0')) {
		char *start = strstr(cmdline, CONSOLE_ARG);

		/* Allocate space for maximum possible new command line */
		buf = malloc(strlen(cmdline) + 1 + CONSOLE_ARG_LEN + 1);
		if (!buf) {
			debug("%s: out of memory\n", __func__);
			return;
		}

		if (start) {
			char *end = strchr(start, ' ');
			int num_start_bytes = start - cmdline + CONSOLE_ARG_LEN;

			strncpy(buf, cmdline, num_start_bytes);
			if (end)
				strcpy(buf + num_start_bytes, end);
			else
				buf[num_start_bytes] = '\0';
		} else {
			sprintf(buf, "%s %s", cmdline, CONSOLE_ARG);
		}
		env_val = buf;
	} else {
		buf = NULL;
		env_val = CONSOLE_ARG;
	}

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

/**
 * Execute selected states of the bootm command.
 *
 * Note the arguments to this state must be the first argument, Any 'bootm'
 * or sub-command arguments must have already been taken.
 *
 * Note that if states contains more than one flag it MUST contain
 * BOOTM_STATE_START, since this handles and consumes the command line args.
 *
 * Also note that aside from boot_os_fn functions and bootm_load_os no other
 * functions we store the return value of in 'ret' may use a negative return
 * value, without special handling.
 *
 * @param cmdtp		Pointer to bootm command table entry
 * @param flag		Command flags (CMD_FLAG_...)
 * @param argc		Number of subcommand arguments (0 = no arguments)
 * @param argv		Arguments
 * @param states	Mask containing states to run (BOOTM_STATE_...)
 * @param images	Image header information
 * @param boot_progress 1 to show boot progress, 0 to not do this
 * @return 0 if ok, something else on error. Some errors will cause this
 *	function to perform a reboot! If states contains BOOTM_STATE_OS_GO
 *	then the intent is to boot an OS, so this function will not return
 *	unless the image type is standalone.
 */
int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
		    int states, bootm_headers_t *images, int boot_progress)
{
	boot_os_fn *boot_fn;
	ulong iflag = 0;
	int ret = 0, need_boot_fn;

	images->state |= states;

	/*
	 * Work through the states and see how far we get. We stop on
	 * any error.
	 */
	if (states & BOOTM_STATE_START)
		ret = bootm_start(cmdtp, flag, argc, argv);

	if (!ret && (states & BOOTM_STATE_FINDOS))
		ret = bootm_find_os(cmdtp, flag, argc, argv);

	if (!ret && (states & BOOTM_STATE_FINDOTHER)) {
		ret = bootm_find_other(cmdtp, flag, argc, argv);
		argc = 0;	/* consume the args */
	}

	/* Load the OS */
	if (!ret && (states & BOOTM_STATE_LOADOS)) {
		ulong load_end;

		iflag = bootm_disable_interrupts();
		ret = bootm_load_os(images, &load_end, 0);
		if (ret == 0)
			lmb_reserve(&images->lmb, images->os.load,
				    (load_end - images->os.load));
		else if (ret && ret != BOOTM_ERR_OVERLAP)
			goto err;
		else if (ret == BOOTM_ERR_OVERLAP)
			ret = 0;
#if defined(CONFIG_SILENT_CONSOLE) && !defined(CONFIG_SILENT_U_BOOT_ONLY)
		if (images->os.os == IH_OS_LINUX)
			fixup_silent_linux();
#endif
	}

	/* Relocate the ramdisk */
#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
	if (!ret && (states & BOOTM_STATE_RAMDISK)) {
		ulong rd_len = images->rd_end - images->rd_start;

		ret = boot_ramdisk_high(&images->lmb, images->rd_start,
			rd_len, &images->initrd_start, &images->initrd_end);
		if (!ret) {
			setenv_hex("initrd_start", images->initrd_start);
			setenv_hex("initrd_end", images->initrd_end);
		}
	}
#endif
#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_LMB)
	if (!ret && (states & BOOTM_STATE_FDT)) {
		boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
		ret = boot_relocate_fdt(&images->lmb, &images->ft_addr,
					&images->ft_len);
	}
#endif

	/* From now on, we need the OS boot function */
	if (ret)
		return ret;
	boot_fn = bootm_os_get_boot_func(images->os.os);
	need_boot_fn = states & (BOOTM_STATE_OS_CMDLINE |
			BOOTM_STATE_OS_BD_T | BOOTM_STATE_OS_PREP |
			BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO);
	if (boot_fn == NULL && need_boot_fn) {
		if (iflag)
			enable_interrupts();
		printf("ERROR: booting os '%s' (%d) is not supported\n",
		       genimg_get_os_name(images->os.os), images->os.os);
		bootstage_error(BOOTSTAGE_ID_CHECK_BOOT_OS);
		return 1;
	}

	/* Call various other states that are not generally used */
	if (!ret && (states & BOOTM_STATE_OS_CMDLINE))
		ret = boot_fn(BOOTM_STATE_OS_CMDLINE, argc, argv, images);
	if (!ret && (states & BOOTM_STATE_OS_BD_T))
		ret = boot_fn(BOOTM_STATE_OS_BD_T, argc, argv, images);
	if (!ret && (states & BOOTM_STATE_OS_PREP))
		ret = boot_fn(BOOTM_STATE_OS_PREP, argc, argv, images);

#ifdef CONFIG_TRACE
	/* Pretend to run the OS, then run a user command */
	if (!ret && (states & BOOTM_STATE_OS_FAKE_GO)) {
		char *cmd_list = getenv("fakegocmd");

		ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_FAKE_GO,
				images, boot_fn);
		if (!ret && cmd_list)
			ret = run_command_list(cmd_list, -1, flag);
	}
#endif

	/* Check for unsupported subcommand. */
	if (ret) {
		puts("subcommand not supported\n");
		return ret;
	}

	/* Now run the OS! We hope this doesn't return */
	if (!ret && (states & BOOTM_STATE_OS_GO))
		ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_GO,
				images, boot_fn);

	/* Deal with any fallout */
err:
	if (iflag)
		enable_interrupts();

	if (ret == BOOTM_ERR_UNIMPLEMENTED)
		bootstage_error(BOOTSTAGE_ID_DECOMP_UNIMPL);
	else if (ret == BOOTM_ERR_RESET)
		do_reset(cmdtp, flag, argc, argv);

	return ret;
}

#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
/**
 * 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");
		bootstage_error(BOOTSTAGE_ID_CHECK_MAGIC);
		return NULL;
	}
	bootstage_mark(BOOTSTAGE_ID_CHECK_HEADER);

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

	bootstage_mark(BOOTSTAGE_ID_CHECK_CHECKSUM);
	image_print_contents(hdr);

	if (verify) {
		puts("   Verifying Checksum ... ");
		if (!image_check_dcrc(hdr)) {
			printf("Bad Data CRC\n");
			bootstage_error(BOOTSTAGE_ID_CHECK_CHECKSUM);
			return NULL;
		}
		puts("OK\n");
	}
	bootstage_mark(BOOTSTAGE_ID_CHECK_ARCH);

	if (!image_check_target_arch(hdr)) {
		printf("Unsupported Architecture 0x%x\n", image_get_arch(hdr));
		bootstage_error(BOOTSTAGE_ID_CHECK_ARCH);
		return NULL;
	}
	return hdr;
}
#endif

/**
 * 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 const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
				   char * const argv[], bootm_headers_t *images,
				   ulong *os_data, ulong *os_len)
{
#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
	image_header_t	*hdr;
#endif
	ulong		img_addr;
	const void *buf;
	const char	*fit_uname_config = NULL;
	const char	*fit_uname_kernel = NULL;
#if defined(CONFIG_FIT)
	int		os_noffset;
#endif

	img_addr = genimg_get_kernel_addr_fit(argc < 1 ? NULL : argv[0],
					      &fit_uname_config,
					      &fit_uname_kernel);

	bootstage_mark(BOOTSTAGE_ID_CHECK_MAGIC);

	/* 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;
	buf = map_sysmem(img_addr, 0);
	switch (genimg_get_format(buf)) {
#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
	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;
		bootstage_mark(BOOTSTAGE_ID_CHECK_IMAGETYPE);

		/* get os_data and os_len */
		switch (image_get_type(hdr)) {
		case IH_TYPE_KERNEL:
		case IH_TYPE_KERNEL_NOLOAD:
			*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;
		case IH_TYPE_STANDALONE:
			*os_data = image_get_data(hdr);
			*os_len = image_get_data_size(hdr);
			break;
		default:
			printf("Wrong Image Type for %s command\n",
			       cmdtp->name);
			bootstage_error(BOOTSTAGE_ID_CHECK_IMAGETYPE);
			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;
		bootstage_mark(BOOTSTAGE_ID_DECOMP_IMAGE);
		break;
#endif
#if defined(CONFIG_FIT)
	case IMAGE_FORMAT_FIT:
		os_noffset = fit_image_load(images, img_addr,
				&fit_uname_kernel, &fit_uname_config,
				IH_ARCH_DEFAULT, IH_TYPE_KERNEL,
				BOOTSTAGE_ID_FIT_KERNEL_START,
				FIT_LOAD_IGNORED, os_data, os_len);
		if (os_noffset < 0)
			return NULL;

		images->fit_hdr_os = map_sysmem(img_addr, 0);
		images->fit_uname_os = fit_uname_kernel;
		images->fit_uname_cfg = fit_uname_config;
		images->fit_noffset_os = os_noffset;
		break;
#endif
#ifdef CONFIG_ANDROID_BOOT_IMAGE
	case IMAGE_FORMAT_ANDROID:
		printf("## Booting Android Image at 0x%08lx ...\n", img_addr);
		if (android_image_get_kernel(buf, images->verify,
					     os_data, os_len))
			return NULL;
		break;
#endif
	default:
		printf("Wrong Image Format for %s command\n", cmdtp->name);
		bootstage_error(BOOTSTAGE_ID_FIT_KERNEL_INFO);
		return NULL;
	}

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

	return buf;
}
#else /* USE_HOSTCC */

void memmove_wd(void *to, void *from, size_t len, ulong chunksz)
{
	memmove(to, from, len);
}

static int bootm_host_load_image(const void *fit, int req_image_type)
{
	const char *fit_uname_config = NULL;
	ulong data, len;
	bootm_headers_t images;
	int noffset;
	ulong load_end;
	uint8_t image_type;
	uint8_t imape_comp;
	void *load_buf;
	int ret;

	memset(&images, '\0', sizeof(images));
	images.verify = 1;
	noffset = fit_image_load(&images, (ulong)fit,
		NULL, &fit_uname_config,
		IH_ARCH_DEFAULT, req_image_type, -1,
		FIT_LOAD_IGNORED, &data, &len);
	if (noffset < 0)
		return noffset;
	if (fit_image_get_type(fit, noffset, &image_type)) {
		puts("Can't get image type!\n");
		return -EINVAL;
	}

	if (fit_image_get_comp(fit, noffset, &imape_comp)) {
		puts("Can't get image compression!\n");
		return -EINVAL;
	}

	/* Allow the image to expand by a factor of 4, should be safe */
	load_buf = malloc((1 << 20) + len * 4);
	ret = decomp_image(imape_comp, 0, data, image_type, load_buf,
			   (void *)data, len, &load_end);
	free(load_buf);
	if (ret && ret != BOOTM_ERR_UNIMPLEMENTED)
		return ret;

	return 0;
}

int bootm_host_load_images(const void *fit, int cfg_noffset)
{
	static uint8_t image_types[] = {
		IH_TYPE_KERNEL,
		IH_TYPE_FLATDT,
		IH_TYPE_RAMDISK,
	};
	int err = 0;
	int i;

	for (i = 0; i < ARRAY_SIZE(image_types); i++) {
		int ret;

		ret = bootm_host_load_image(fit, image_types[i]);
		if (!err && ret && ret != -ENOENT)
			err = ret;
	}

	/* Return the first error we found */
	return err;
}

#endif /* ndef USE_HOSTCC */