bootm: Support android boot on sandbox
[platform/kernel/u-boot.git] / common / bootm.c
1 /*
2  * (C) Copyright 2000-2009
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <bootm.h>
10 #include <bzlib.h>
11 #include <image.h>
12 #include <fdt_support.h>
13 #include <lmb.h>
14 #include <malloc.h>
15 #include <asm/io.h>
16 #include <linux/lzo.h>
17 #include <lzma/LzmaTypes.h>
18 #include <lzma/LzmaDec.h>
19 #include <lzma/LzmaTools.h>
20
21 #if defined(CONFIG_CMD_USB)
22 #include <usb.h>
23 #endif
24
25 DECLARE_GLOBAL_DATA_PTR;
26
27 #ifndef CONFIG_SYS_BOOTM_LEN
28 /* use 8MByte as default max gunzip size */
29 #define CONFIG_SYS_BOOTM_LEN    0x800000
30 #endif
31
32 #define IH_INITRD_ARCH IH_ARCH_DEFAULT
33
34 static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
35                                    char * const argv[], bootm_headers_t *images,
36                                    ulong *os_data, ulong *os_len);
37
38 #ifdef CONFIG_LMB
39 static void boot_start_lmb(bootm_headers_t *images)
40 {
41         ulong           mem_start;
42         phys_size_t     mem_size;
43
44         lmb_init(&images->lmb);
45
46         mem_start = getenv_bootm_low();
47         mem_size = getenv_bootm_size();
48
49         lmb_add(&images->lmb, (phys_addr_t)mem_start, mem_size);
50
51         arch_lmb_reserve(&images->lmb);
52         board_lmb_reserve(&images->lmb);
53 }
54 #else
55 #define lmb_reserve(lmb, base, size)
56 static inline void boot_start_lmb(bootm_headers_t *images) { }
57 #endif
58
59 static int bootm_start(cmd_tbl_t *cmdtp, int flag, int argc,
60                        char * const argv[])
61 {
62         memset((void *)&images, 0, sizeof(images));
63         images.verify = getenv_yesno("verify");
64
65         boot_start_lmb(&images);
66
67         bootstage_mark_name(BOOTSTAGE_ID_BOOTM_START, "bootm_start");
68         images.state = BOOTM_STATE_START;
69
70         return 0;
71 }
72
73 static int bootm_find_os(cmd_tbl_t *cmdtp, int flag, int argc,
74                          char * const argv[])
75 {
76         const void *os_hdr;
77         bool ep_found = false;
78
79         /* get kernel image header, start address and length */
80         os_hdr = boot_get_kernel(cmdtp, flag, argc, argv,
81                         &images, &images.os.image_start, &images.os.image_len);
82         if (images.os.image_len == 0) {
83                 puts("ERROR: can't get kernel image!\n");
84                 return 1;
85         }
86
87         /* get image parameters */
88         switch (genimg_get_format(os_hdr)) {
89 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
90         case IMAGE_FORMAT_LEGACY:
91                 images.os.type = image_get_type(os_hdr);
92                 images.os.comp = image_get_comp(os_hdr);
93                 images.os.os = image_get_os(os_hdr);
94
95                 images.os.end = image_get_image_end(os_hdr);
96                 images.os.load = image_get_load(os_hdr);
97                 break;
98 #endif
99 #if defined(CONFIG_FIT)
100         case IMAGE_FORMAT_FIT:
101                 if (fit_image_get_type(images.fit_hdr_os,
102                                        images.fit_noffset_os,
103                                        &images.os.type)) {
104                         puts("Can't get image type!\n");
105                         bootstage_error(BOOTSTAGE_ID_FIT_TYPE);
106                         return 1;
107                 }
108
109                 if (fit_image_get_comp(images.fit_hdr_os,
110                                        images.fit_noffset_os,
111                                        &images.os.comp)) {
112                         puts("Can't get image compression!\n");
113                         bootstage_error(BOOTSTAGE_ID_FIT_COMPRESSION);
114                         return 1;
115                 }
116
117                 if (fit_image_get_os(images.fit_hdr_os, images.fit_noffset_os,
118                                      &images.os.os)) {
119                         puts("Can't get image OS!\n");
120                         bootstage_error(BOOTSTAGE_ID_FIT_OS);
121                         return 1;
122                 }
123
124                 images.os.end = fit_get_end(images.fit_hdr_os);
125
126                 if (fit_image_get_load(images.fit_hdr_os, images.fit_noffset_os,
127                                        &images.os.load)) {
128                         puts("Can't get image load address!\n");
129                         bootstage_error(BOOTSTAGE_ID_FIT_LOADADDR);
130                         return 1;
131                 }
132                 break;
133 #endif
134 #ifdef CONFIG_ANDROID_BOOT_IMAGE
135         case IMAGE_FORMAT_ANDROID:
136                 images.os.type = IH_TYPE_KERNEL;
137                 images.os.comp = IH_COMP_NONE;
138                 images.os.os = IH_OS_LINUX;
139                 images.ep = images.os.load;
140                 ep_found = true;
141
142                 images.os.end = android_image_get_end(os_hdr);
143                 images.os.load = android_image_get_kload(os_hdr);
144                 break;
145 #endif
146         default:
147                 puts("ERROR: unknown image format type!\n");
148                 return 1;
149         }
150
151         /* find kernel entry point */
152         if (images.legacy_hdr_valid) {
153                 images.ep = image_get_ep(&images.legacy_hdr_os_copy);
154 #if defined(CONFIG_FIT)
155         } else if (images.fit_uname_os) {
156                 int ret;
157
158                 ret = fit_image_get_entry(images.fit_hdr_os,
159                                           images.fit_noffset_os, &images.ep);
160                 if (ret) {
161                         puts("Can't get entry point property!\n");
162                         return 1;
163                 }
164 #endif
165         } else if (!ep_found) {
166                 puts("Could not find kernel entry point!\n");
167                 return 1;
168         }
169
170         if (images.os.type == IH_TYPE_KERNEL_NOLOAD) {
171                 images.os.load = images.os.image_start;
172                 images.ep += images.os.load;
173         }
174
175         images.os.start = (ulong)os_hdr;
176
177         return 0;
178 }
179
180 static int bootm_find_ramdisk(int flag, int argc, char * const argv[])
181 {
182         int ret;
183
184         /* find ramdisk */
185         ret = boot_get_ramdisk(argc, argv, &images, IH_INITRD_ARCH,
186                                &images.rd_start, &images.rd_end);
187         if (ret) {
188                 puts("Ramdisk image is corrupt or invalid\n");
189                 return 1;
190         }
191
192         return 0;
193 }
194
195 #if defined(CONFIG_OF_LIBFDT)
196 static int bootm_find_fdt(int flag, int argc, char * const argv[])
197 {
198         int ret;
199
200         /* find flattened device tree */
201         ret = boot_get_fdt(flag, argc, argv, IH_ARCH_DEFAULT, &images,
202                            &images.ft_addr, &images.ft_len);
203         if (ret) {
204                 puts("Could not find a valid device tree\n");
205                 return 1;
206         }
207
208         set_working_fdt_addr(images.ft_addr);
209
210         return 0;
211 }
212 #endif
213
214 int bootm_find_ramdisk_fdt(int flag, int argc, char * const argv[])
215 {
216         if (bootm_find_ramdisk(flag, argc, argv))
217                 return 1;
218
219 #if defined(CONFIG_OF_LIBFDT)
220         if (bootm_find_fdt(flag, argc, argv))
221                 return 1;
222 #endif
223
224         return 0;
225 }
226
227 static int bootm_find_other(cmd_tbl_t *cmdtp, int flag, int argc,
228                             char * const argv[])
229 {
230         if (((images.os.type == IH_TYPE_KERNEL) ||
231              (images.os.type == IH_TYPE_KERNEL_NOLOAD) ||
232              (images.os.type == IH_TYPE_MULTI)) &&
233             (images.os.os == IH_OS_LINUX ||
234                  images.os.os == IH_OS_VXWORKS))
235                 return bootm_find_ramdisk_fdt(flag, argc, argv);
236
237         return 0;
238 }
239
240 static int bootm_load_os(bootm_headers_t *images, unsigned long *load_end,
241                          int boot_progress)
242 {
243         image_info_t os = images->os;
244         uint8_t comp = os.comp;
245         ulong load = os.load;
246         ulong blob_start = os.start;
247         ulong blob_end = os.end;
248         ulong image_start = os.image_start;
249         ulong image_len = os.image_len;
250         __maybe_unused uint unc_len = CONFIG_SYS_BOOTM_LEN;
251         int no_overlap = 0;
252         void *load_buf, *image_buf;
253 #if defined(CONFIG_LZMA) || defined(CONFIG_LZO)
254         int ret;
255 #endif /* defined(CONFIG_LZMA) || defined(CONFIG_LZO) */
256
257         const char *type_name = genimg_get_type_name(os.type);
258
259         load_buf = map_sysmem(load, unc_len);
260         image_buf = map_sysmem(image_start, image_len);
261         switch (comp) {
262         case IH_COMP_NONE:
263                 if (load == image_start) {
264                         printf("   XIP %s ... ", type_name);
265                         no_overlap = 1;
266                 } else {
267                         printf("   Loading %s ... ", type_name);
268                         memmove_wd(load_buf, image_buf, image_len, CHUNKSZ);
269                 }
270                 *load_end = load + image_len;
271                 break;
272 #ifdef CONFIG_GZIP
273         case IH_COMP_GZIP:
274                 printf("   Uncompressing %s ... ", type_name);
275                 if (gunzip(load_buf, unc_len, image_buf, &image_len) != 0) {
276                         puts("GUNZIP: uncompress, out-of-mem or overwrite error - must RESET board to recover\n");
277                         if (boot_progress)
278                                 bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
279                         return BOOTM_ERR_RESET;
280                 }
281
282                 *load_end = load + image_len;
283                 break;
284 #endif /* CONFIG_GZIP */
285 #ifdef CONFIG_BZIP2
286         case IH_COMP_BZIP2:
287                 printf("   Uncompressing %s ... ", type_name);
288                 /*
289                  * If we've got less than 4 MB of malloc() space,
290                  * use slower decompression algorithm which requires
291                  * at most 2300 KB of memory.
292                  */
293                 int i = BZ2_bzBuffToBuffDecompress(load_buf, &unc_len,
294                         image_buf, image_len,
295                         CONFIG_SYS_MALLOC_LEN < (4096 * 1024), 0);
296                 if (i != BZ_OK) {
297                         printf("BUNZIP2: uncompress or overwrite error %d - must RESET board to recover\n",
298                                i);
299                         if (boot_progress)
300                                 bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
301                         return BOOTM_ERR_RESET;
302                 }
303
304                 *load_end = load + unc_len;
305                 break;
306 #endif /* CONFIG_BZIP2 */
307 #ifdef CONFIG_LZMA
308         case IH_COMP_LZMA: {
309                 SizeT lzma_len = unc_len;
310                 printf("   Uncompressing %s ... ", type_name);
311
312                 ret = lzmaBuffToBuffDecompress(load_buf, &lzma_len,
313                                                image_buf, image_len);
314                 unc_len = lzma_len;
315                 if (ret != SZ_OK) {
316                         printf("LZMA: uncompress or overwrite error %d - must RESET board to recover\n",
317                                ret);
318                         bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
319                         return BOOTM_ERR_RESET;
320                 }
321                 *load_end = load + unc_len;
322                 break;
323         }
324 #endif /* CONFIG_LZMA */
325 #ifdef CONFIG_LZO
326         case IH_COMP_LZO: {
327                 size_t size = unc_len;
328
329                 printf("   Uncompressing %s ... ", type_name);
330
331                 ret = lzop_decompress(image_buf, image_len, load_buf, &size);
332                 if (ret != LZO_E_OK) {
333                         printf("LZO: uncompress or overwrite error %d - must RESET board to recover\n",
334                                ret);
335                         if (boot_progress)
336                                 bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
337                         return BOOTM_ERR_RESET;
338                 }
339
340                 *load_end = load + size;
341                 break;
342         }
343 #endif /* CONFIG_LZO */
344         default:
345                 printf("Unimplemented compression type %d\n", comp);
346                 return BOOTM_ERR_UNIMPLEMENTED;
347         }
348
349         flush_cache(load, (*load_end - load) * sizeof(ulong));
350
351         puts("OK\n");
352         debug("   kernel loaded at 0x%08lx, end = 0x%08lx\n", load, *load_end);
353         bootstage_mark(BOOTSTAGE_ID_KERNEL_LOADED);
354
355         if (!no_overlap && (load < blob_end) && (*load_end > blob_start)) {
356                 debug("images.os.start = 0x%lX, images.os.end = 0x%lx\n",
357                       blob_start, blob_end);
358                 debug("images.os.load = 0x%lx, load_end = 0x%lx\n", load,
359                       *load_end);
360
361                 /* Check what type of image this is. */
362                 if (images->legacy_hdr_valid) {
363                         if (image_get_type(&images->legacy_hdr_os_copy)
364                                         == IH_TYPE_MULTI)
365                                 puts("WARNING: legacy format multi component image overwritten\n");
366                         return BOOTM_ERR_OVERLAP;
367                 } else {
368                         puts("ERROR: new format image overwritten - must RESET the board to recover\n");
369                         bootstage_error(BOOTSTAGE_ID_OVERWRITTEN);
370                         return BOOTM_ERR_RESET;
371                 }
372         }
373
374         return 0;
375 }
376
377 /**
378  * bootm_disable_interrupts() - Disable interrupts in preparation for load/boot
379  *
380  * @return interrupt flag (0 if interrupts were disabled, non-zero if they were
381  *      enabled)
382  */
383 ulong bootm_disable_interrupts(void)
384 {
385         ulong iflag;
386
387         /*
388          * We have reached the point of no return: we are going to
389          * overwrite all exception vector code, so we cannot easily
390          * recover from any failures any more...
391          */
392         iflag = disable_interrupts();
393 #ifdef CONFIG_NETCONSOLE
394         /* Stop the ethernet stack if NetConsole could have left it up */
395         eth_halt();
396         eth_unregister(eth_get_dev());
397 #endif
398
399 #if defined(CONFIG_CMD_USB)
400         /*
401          * turn off USB to prevent the host controller from writing to the
402          * SDRAM while Linux is booting. This could happen (at least for OHCI
403          * controller), because the HCCA (Host Controller Communication Area)
404          * lies within the SDRAM and the host controller writes continously to
405          * this area (as busmaster!). The HccaFrameNumber is for example
406          * updated every 1 ms within the HCCA structure in SDRAM! For more
407          * details see the OpenHCI specification.
408          */
409         usb_stop();
410 #endif
411         return iflag;
412 }
413
414 #if defined(CONFIG_SILENT_CONSOLE) && !defined(CONFIG_SILENT_U_BOOT_ONLY)
415
416 #define CONSOLE_ARG     "console="
417 #define CONSOLE_ARG_LEN (sizeof(CONSOLE_ARG) - 1)
418
419 static void fixup_silent_linux(void)
420 {
421         char *buf;
422         const char *env_val;
423         char *cmdline = getenv("bootargs");
424         int want_silent;
425
426         /*
427          * Only fix cmdline when requested. The environment variable can be:
428          *
429          *      no - we never fixup
430          *      yes - we always fixup
431          *      unset - we rely on the console silent flag
432          */
433         want_silent = getenv_yesno("silent_linux");
434         if (want_silent == 0)
435                 return;
436         else if (want_silent == -1 && !(gd->flags & GD_FLG_SILENT))
437                 return;
438
439         debug("before silent fix-up: %s\n", cmdline);
440         if (cmdline && (cmdline[0] != '\0')) {
441                 char *start = strstr(cmdline, CONSOLE_ARG);
442
443                 /* Allocate space for maximum possible new command line */
444                 buf = malloc(strlen(cmdline) + 1 + CONSOLE_ARG_LEN + 1);
445                 if (!buf) {
446                         debug("%s: out of memory\n", __func__);
447                         return;
448                 }
449
450                 if (start) {
451                         char *end = strchr(start, ' ');
452                         int num_start_bytes = start - cmdline + CONSOLE_ARG_LEN;
453
454                         strncpy(buf, cmdline, num_start_bytes);
455                         if (end)
456                                 strcpy(buf + num_start_bytes, end);
457                         else
458                                 buf[num_start_bytes] = '\0';
459                 } else {
460                         sprintf(buf, "%s %s", cmdline, CONSOLE_ARG);
461                 }
462                 env_val = buf;
463         } else {
464                 buf = NULL;
465                 env_val = CONSOLE_ARG;
466         }
467
468         setenv("bootargs", env_val);
469         debug("after silent fix-up: %s\n", env_val);
470         free(buf);
471 }
472 #endif /* CONFIG_SILENT_CONSOLE */
473
474 /**
475  * Execute selected states of the bootm command.
476  *
477  * Note the arguments to this state must be the first argument, Any 'bootm'
478  * or sub-command arguments must have already been taken.
479  *
480  * Note that if states contains more than one flag it MUST contain
481  * BOOTM_STATE_START, since this handles and consumes the command line args.
482  *
483  * Also note that aside from boot_os_fn functions and bootm_load_os no other
484  * functions we store the return value of in 'ret' may use a negative return
485  * value, without special handling.
486  *
487  * @param cmdtp         Pointer to bootm command table entry
488  * @param flag          Command flags (CMD_FLAG_...)
489  * @param argc          Number of subcommand arguments (0 = no arguments)
490  * @param argv          Arguments
491  * @param states        Mask containing states to run (BOOTM_STATE_...)
492  * @param images        Image header information
493  * @param boot_progress 1 to show boot progress, 0 to not do this
494  * @return 0 if ok, something else on error. Some errors will cause this
495  *      function to perform a reboot! If states contains BOOTM_STATE_OS_GO
496  *      then the intent is to boot an OS, so this function will not return
497  *      unless the image type is standalone.
498  */
499 int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
500                     int states, bootm_headers_t *images, int boot_progress)
501 {
502         boot_os_fn *boot_fn;
503         ulong iflag = 0;
504         int ret = 0, need_boot_fn;
505
506         images->state |= states;
507
508         /*
509          * Work through the states and see how far we get. We stop on
510          * any error.
511          */
512         if (states & BOOTM_STATE_START)
513                 ret = bootm_start(cmdtp, flag, argc, argv);
514
515         if (!ret && (states & BOOTM_STATE_FINDOS))
516                 ret = bootm_find_os(cmdtp, flag, argc, argv);
517
518         if (!ret && (states & BOOTM_STATE_FINDOTHER)) {
519                 ret = bootm_find_other(cmdtp, flag, argc, argv);
520                 argc = 0;       /* consume the args */
521         }
522
523         /* Load the OS */
524         if (!ret && (states & BOOTM_STATE_LOADOS)) {
525                 ulong load_end;
526
527                 iflag = bootm_disable_interrupts();
528                 ret = bootm_load_os(images, &load_end, 0);
529                 if (ret == 0)
530                         lmb_reserve(&images->lmb, images->os.load,
531                                     (load_end - images->os.load));
532                 else if (ret && ret != BOOTM_ERR_OVERLAP)
533                         goto err;
534                 else if (ret == BOOTM_ERR_OVERLAP)
535                         ret = 0;
536 #if defined(CONFIG_SILENT_CONSOLE) && !defined(CONFIG_SILENT_U_BOOT_ONLY)
537                 if (images->os.os == IH_OS_LINUX)
538                         fixup_silent_linux();
539 #endif
540         }
541
542         /* Relocate the ramdisk */
543 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
544         if (!ret && (states & BOOTM_STATE_RAMDISK)) {
545                 ulong rd_len = images->rd_end - images->rd_start;
546
547                 ret = boot_ramdisk_high(&images->lmb, images->rd_start,
548                         rd_len, &images->initrd_start, &images->initrd_end);
549                 if (!ret) {
550                         setenv_hex("initrd_start", images->initrd_start);
551                         setenv_hex("initrd_end", images->initrd_end);
552                 }
553         }
554 #endif
555 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_LMB)
556         if (!ret && (states & BOOTM_STATE_FDT)) {
557                 boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
558                 ret = boot_relocate_fdt(&images->lmb, &images->ft_addr,
559                                         &images->ft_len);
560         }
561 #endif
562
563         /* From now on, we need the OS boot function */
564         if (ret)
565                 return ret;
566         boot_fn = bootm_os_get_boot_func(images->os.os);
567         need_boot_fn = states & (BOOTM_STATE_OS_CMDLINE |
568                         BOOTM_STATE_OS_BD_T | BOOTM_STATE_OS_PREP |
569                         BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO);
570         if (boot_fn == NULL && need_boot_fn) {
571                 if (iflag)
572                         enable_interrupts();
573                 printf("ERROR: booting os '%s' (%d) is not supported\n",
574                        genimg_get_os_name(images->os.os), images->os.os);
575                 bootstage_error(BOOTSTAGE_ID_CHECK_BOOT_OS);
576                 return 1;
577         }
578
579         /* Call various other states that are not generally used */
580         if (!ret && (states & BOOTM_STATE_OS_CMDLINE))
581                 ret = boot_fn(BOOTM_STATE_OS_CMDLINE, argc, argv, images);
582         if (!ret && (states & BOOTM_STATE_OS_BD_T))
583                 ret = boot_fn(BOOTM_STATE_OS_BD_T, argc, argv, images);
584         if (!ret && (states & BOOTM_STATE_OS_PREP))
585                 ret = boot_fn(BOOTM_STATE_OS_PREP, argc, argv, images);
586
587 #ifdef CONFIG_TRACE
588         /* Pretend to run the OS, then run a user command */
589         if (!ret && (states & BOOTM_STATE_OS_FAKE_GO)) {
590                 char *cmd_list = getenv("fakegocmd");
591
592                 ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_FAKE_GO,
593                                 images, boot_fn);
594                 if (!ret && cmd_list)
595                         ret = run_command_list(cmd_list, -1, flag);
596         }
597 #endif
598
599         /* Check for unsupported subcommand. */
600         if (ret) {
601                 puts("subcommand not supported\n");
602                 return ret;
603         }
604
605         /* Now run the OS! We hope this doesn't return */
606         if (!ret && (states & BOOTM_STATE_OS_GO))
607                 ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_GO,
608                                 images, boot_fn);
609
610         /* Deal with any fallout */
611 err:
612         if (iflag)
613                 enable_interrupts();
614
615         if (ret == BOOTM_ERR_UNIMPLEMENTED)
616                 bootstage_error(BOOTSTAGE_ID_DECOMP_UNIMPL);
617         else if (ret == BOOTM_ERR_RESET)
618                 do_reset(cmdtp, flag, argc, argv);
619
620         return ret;
621 }
622
623 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
624 /**
625  * image_get_kernel - verify legacy format kernel image
626  * @img_addr: in RAM address of the legacy format image to be verified
627  * @verify: data CRC verification flag
628  *
629  * image_get_kernel() verifies legacy image integrity and returns pointer to
630  * legacy image header if image verification was completed successfully.
631  *
632  * returns:
633  *     pointer to a legacy image header if valid image was found
634  *     otherwise return NULL
635  */
636 static image_header_t *image_get_kernel(ulong img_addr, int verify)
637 {
638         image_header_t *hdr = (image_header_t *)img_addr;
639
640         if (!image_check_magic(hdr)) {
641                 puts("Bad Magic Number\n");
642                 bootstage_error(BOOTSTAGE_ID_CHECK_MAGIC);
643                 return NULL;
644         }
645         bootstage_mark(BOOTSTAGE_ID_CHECK_HEADER);
646
647         if (!image_check_hcrc(hdr)) {
648                 puts("Bad Header Checksum\n");
649                 bootstage_error(BOOTSTAGE_ID_CHECK_HEADER);
650                 return NULL;
651         }
652
653         bootstage_mark(BOOTSTAGE_ID_CHECK_CHECKSUM);
654         image_print_contents(hdr);
655
656         if (verify) {
657                 puts("   Verifying Checksum ... ");
658                 if (!image_check_dcrc(hdr)) {
659                         printf("Bad Data CRC\n");
660                         bootstage_error(BOOTSTAGE_ID_CHECK_CHECKSUM);
661                         return NULL;
662                 }
663                 puts("OK\n");
664         }
665         bootstage_mark(BOOTSTAGE_ID_CHECK_ARCH);
666
667         if (!image_check_target_arch(hdr)) {
668                 printf("Unsupported Architecture 0x%x\n", image_get_arch(hdr));
669                 bootstage_error(BOOTSTAGE_ID_CHECK_ARCH);
670                 return NULL;
671         }
672         return hdr;
673 }
674 #endif
675
676 /**
677  * boot_get_kernel - find kernel image
678  * @os_data: pointer to a ulong variable, will hold os data start address
679  * @os_len: pointer to a ulong variable, will hold os data length
680  *
681  * boot_get_kernel() tries to find a kernel image, verifies its integrity
682  * and locates kernel data.
683  *
684  * returns:
685  *     pointer to image header if valid image was found, plus kernel start
686  *     address and length, otherwise NULL
687  */
688 static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
689                                    char * const argv[], bootm_headers_t *images,
690                                    ulong *os_data, ulong *os_len)
691 {
692 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
693         image_header_t  *hdr;
694 #endif
695         ulong           img_addr;
696         const void *buf;
697 #if defined(CONFIG_FIT)
698         const char      *fit_uname_config = NULL;
699         const char      *fit_uname_kernel = NULL;
700         int             os_noffset;
701 #endif
702
703         /* find out kernel image address */
704         if (argc < 1) {
705                 img_addr = load_addr;
706                 debug("*  kernel: default image load address = 0x%08lx\n",
707                       load_addr);
708 #if defined(CONFIG_FIT)
709         } else if (fit_parse_conf(argv[0], load_addr, &img_addr,
710                                   &fit_uname_config)) {
711                 debug("*  kernel: config '%s' from image at 0x%08lx\n",
712                       fit_uname_config, img_addr);
713         } else if (fit_parse_subimage(argv[0], load_addr, &img_addr,
714                                      &fit_uname_kernel)) {
715                 debug("*  kernel: subimage '%s' from image at 0x%08lx\n",
716                       fit_uname_kernel, img_addr);
717 #endif
718         } else {
719                 img_addr = simple_strtoul(argv[0], NULL, 16);
720                 debug("*  kernel: cmdline image address = 0x%08lx\n",
721                       img_addr);
722         }
723
724         bootstage_mark(BOOTSTAGE_ID_CHECK_MAGIC);
725
726         /* copy from dataflash if needed */
727         img_addr = genimg_get_image(img_addr);
728
729         /* check image type, for FIT images get FIT kernel node */
730         *os_data = *os_len = 0;
731         buf = map_sysmem(img_addr, 0);
732         switch (genimg_get_format(buf)) {
733 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
734         case IMAGE_FORMAT_LEGACY:
735                 printf("## Booting kernel from Legacy Image at %08lx ...\n",
736                        img_addr);
737                 hdr = image_get_kernel(img_addr, images->verify);
738                 if (!hdr)
739                         return NULL;
740                 bootstage_mark(BOOTSTAGE_ID_CHECK_IMAGETYPE);
741
742                 /* get os_data and os_len */
743                 switch (image_get_type(hdr)) {
744                 case IH_TYPE_KERNEL:
745                 case IH_TYPE_KERNEL_NOLOAD:
746                         *os_data = image_get_data(hdr);
747                         *os_len = image_get_data_size(hdr);
748                         break;
749                 case IH_TYPE_MULTI:
750                         image_multi_getimg(hdr, 0, os_data, os_len);
751                         break;
752                 case IH_TYPE_STANDALONE:
753                         *os_data = image_get_data(hdr);
754                         *os_len = image_get_data_size(hdr);
755                         break;
756                 default:
757                         printf("Wrong Image Type for %s command\n",
758                                cmdtp->name);
759                         bootstage_error(BOOTSTAGE_ID_CHECK_IMAGETYPE);
760                         return NULL;
761                 }
762
763                 /*
764                  * copy image header to allow for image overwrites during
765                  * kernel decompression.
766                  */
767                 memmove(&images->legacy_hdr_os_copy, hdr,
768                         sizeof(image_header_t));
769
770                 /* save pointer to image header */
771                 images->legacy_hdr_os = hdr;
772
773                 images->legacy_hdr_valid = 1;
774                 bootstage_mark(BOOTSTAGE_ID_DECOMP_IMAGE);
775                 break;
776 #endif
777 #if defined(CONFIG_FIT)
778         case IMAGE_FORMAT_FIT:
779                 os_noffset = fit_image_load(images, img_addr,
780                                 &fit_uname_kernel, &fit_uname_config,
781                                 IH_ARCH_DEFAULT, IH_TYPE_KERNEL,
782                                 BOOTSTAGE_ID_FIT_KERNEL_START,
783                                 FIT_LOAD_IGNORED, os_data, os_len);
784                 if (os_noffset < 0)
785                         return NULL;
786
787                 images->fit_hdr_os = map_sysmem(img_addr, 0);
788                 images->fit_uname_os = fit_uname_kernel;
789                 images->fit_uname_cfg = fit_uname_config;
790                 images->fit_noffset_os = os_noffset;
791                 break;
792 #endif
793 #ifdef CONFIG_ANDROID_BOOT_IMAGE
794         case IMAGE_FORMAT_ANDROID:
795                 printf("## Booting Android Image at 0x%08lx ...\n", img_addr);
796                 if (android_image_get_kernel(buf, images->verify,
797                                              os_data, os_len))
798                         return NULL;
799                 break;
800 #endif
801         default:
802                 printf("Wrong Image Format for %s command\n", cmdtp->name);
803                 bootstage_error(BOOTSTAGE_ID_FIT_KERNEL_INFO);
804                 return NULL;
805         }
806
807         debug("   kernel data at 0x%08lx, len = 0x%08lx (%ld)\n",
808               *os_data, *os_len, *os_len);
809
810         return buf;
811 }