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 #ifndef USE_HOSTCC
   9 #include <common.h>
  10 #include <bootstage.h>
  11 #include <bzlib.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 #if defined(CONFIG_CMD_USB)
  21 #include <usb.h>
  22 #endif
  23 #else
  24 #include "mkimage.h"
  25 #endif
  26
  27 #include <command.h>
  28 #include <bootm.h>
  29 #include <image.h>
  30
  31 #ifndef CONFIG_SYS_BOOTM_LEN
  32 /* use 8MByte as default max gunzip size */
  33 #define CONFIG_SYS_BOOTM_LEN    0x800000
  34 #endif
  35
  36 #define IH_INITRD_ARCH IH_ARCH_DEFAULT
  37
  38 #ifndef USE_HOSTCC
  39
  40 DECLARE_GLOBAL_DATA_PTR;
  41
  42 static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
  43                                    char * const argv[], bootm_headers_t *images,
  44                                    ulong *os_data, ulong *os_len);
  45
  46 #ifdef CONFIG_LMB
  47 static void boot_start_lmb(bootm_headers_t *images)
  48 {
  49         ulong           mem_start;
  50         phys_size_t     mem_size;
  51
  52         lmb_init(&images->lmb);
  53
  54         mem_start = getenv_bootm_low();
  55         mem_size = getenv_bootm_size();
  56
  57         lmb_add(&images->lmb, (phys_addr_t)mem_start, mem_size);
  58
  59         arch_lmb_reserve(&images->lmb);
  60         board_lmb_reserve(&images->lmb);
  61 }
  62 #else
  63 #define lmb_reserve(lmb, base, size)
  64 static inline void boot_start_lmb(bootm_headers_t *images) { }
  65 #endif
  66
  67 static int bootm_start(cmd_tbl_t *cmdtp, int flag, int argc,
  68                        char * const argv[])
  69 {
  70         memset((void *)&images, 0, sizeof(images));
  71         images.verify = getenv_yesno("verify");
  72
  73         boot_start_lmb(&images);
  74
  75         bootstage_mark_name(BOOTSTAGE_ID_BOOTM_START, "bootm_start");
  76         images.state = BOOTM_STATE_START;
  77
  78         return 0;
  79 }
  80
  81 static int bootm_find_os(cmd_tbl_t *cmdtp, int flag, int argc,
  82                          char * const argv[])
  83 {
  84         const void *os_hdr;
  85         bool ep_found = false;
  86
  87         /* get kernel image header, start address and length */
  88         os_hdr = boot_get_kernel(cmdtp, flag, argc, argv,
  89                         &images, &images.os.image_start, &images.os.image_len);
  90         if (images.os.image_len == 0) {
  91                 puts("ERROR: can't get kernel image!\n");
  92                 return 1;
  93         }
  94
  95         /* get image parameters */
  96         switch (genimg_get_format(os_hdr)) {
  97 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
  98         case IMAGE_FORMAT_LEGACY:
  99                 images.os.type = image_get_type(os_hdr);
 100                 images.os.comp = image_get_comp(os_hdr);
 101                 images.os.os = image_get_os(os_hdr);
 102
 103                 images.os.end = image_get_image_end(os_hdr);
 104                 images.os.load = image_get_load(os_hdr);
 105                 break;
 106 #endif
 107 #if defined(CONFIG_FIT)
 108         case IMAGE_FORMAT_FIT:
 109                 if (fit_image_get_type(images.fit_hdr_os,
 110                                        images.fit_noffset_os,
 111                                        &images.os.type)) {
 112                         puts("Can't get image type!\n");
 113                         bootstage_error(BOOTSTAGE_ID_FIT_TYPE);
 114                         return 1;
 115                 }
 116
 117                 if (fit_image_get_comp(images.fit_hdr_os,
 118                                        images.fit_noffset_os,
 119                                        &images.os.comp)) {
 120                         puts("Can't get image compression!\n");
 121                         bootstage_error(BOOTSTAGE_ID_FIT_COMPRESSION);
 122                         return 1;
 123                 }
 124
 125                 if (fit_image_get_os(images.fit_hdr_os, images.fit_noffset_os,
 126                                      &images.os.os)) {
 127                         puts("Can't get image OS!\n");
 128                         bootstage_error(BOOTSTAGE_ID_FIT_OS);
 129                         return 1;
 130                 }
 131
 132                 images.os.end = fit_get_end(images.fit_hdr_os);
 133
 134                 if (fit_image_get_load(images.fit_hdr_os, images.fit_noffset_os,
 135                                        &images.os.load)) {
 136                         puts("Can't get image load address!\n");
 137                         bootstage_error(BOOTSTAGE_ID_FIT_LOADADDR);
 138                         return 1;
 139                 }
 140                 break;
 141 #endif
 142 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 143         case IMAGE_FORMAT_ANDROID:
 144                 images.os.type = IH_TYPE_KERNEL;
 145                 images.os.comp = IH_COMP_NONE;
 146                 images.os.os = IH_OS_LINUX;
 147                 images.ep = images.os.load;
 148                 ep_found = true;
 149
 150                 images.os.end = android_image_get_end(os_hdr);
 151                 images.os.load = android_image_get_kload(os_hdr);
 152                 break;
 153 #endif
 154         default:
 155                 puts("ERROR: unknown image format type!\n");
 156                 return 1;
 157         }
 158
 159         /* find kernel entry point */
 160         if (images.legacy_hdr_valid) {
 161                 images.ep = image_get_ep(&images.legacy_hdr_os_copy);
 162 #if defined(CONFIG_FIT)
 163         } else if (images.fit_uname_os) {
 164                 int ret;
 165
 166                 ret = fit_image_get_entry(images.fit_hdr_os,
 167                                           images.fit_noffset_os, &images.ep);
 168                 if (ret) {
 169                         puts("Can't get entry point property!\n");
 170                         return 1;
 171                 }
 172 #endif
 173         } else if (!ep_found) {
 174                 puts("Could not find kernel entry point!\n");
 175                 return 1;
 176         }
 177
 178         if (images.os.type == IH_TYPE_KERNEL_NOLOAD) {
 179                 images.os.load = images.os.image_start;
 180                 images.ep += images.os.load;
 181         }
 182
 183         images.os.start = (ulong)os_hdr;
 184
 185         return 0;
 186 }
 187
 188 static int bootm_find_ramdisk(int flag, int argc, char * const argv[])
 189 {
 190         int ret;
 191
 192         /* find ramdisk */
 193         ret = boot_get_ramdisk(argc, argv, &images, IH_INITRD_ARCH,
 194                                &images.rd_start, &images.rd_end);
 195         if (ret) {
 196                 puts("Ramdisk image is corrupt or invalid\n");
 197                 return 1;
 198         }
 199
 200         return 0;
 201 }
 202
 203 #if defined(CONFIG_OF_LIBFDT)
 204 static int bootm_find_fdt(int flag, int argc, char * const argv[])
 205 {
 206         int ret;
 207
 208         /* find flattened device tree */
 209         ret = boot_get_fdt(flag, argc, argv, IH_ARCH_DEFAULT, &images,
 210                            &images.ft_addr, &images.ft_len);
 211         if (ret) {
 212                 puts("Could not find a valid device tree\n");
 213                 return 1;
 214         }
 215
 216         set_working_fdt_addr(images.ft_addr);
 217
 218         return 0;
 219 }
 220 #endif
 221
 222 int bootm_find_ramdisk_fdt(int flag, int argc, char * const argv[])
 223 {
 224         if (bootm_find_ramdisk(flag, argc, argv))
 225                 return 1;
 226
 227 #if defined(CONFIG_OF_LIBFDT)
 228         if (bootm_find_fdt(flag, argc, argv))
 229                 return 1;
 230 #endif
 231
 232         return 0;
 233 }
 234
 235 static int bootm_find_other(cmd_tbl_t *cmdtp, int flag, int argc,
 236                             char * const argv[])
 237 {
 238         if (((images.os.type == IH_TYPE_KERNEL) ||
 239              (images.os.type == IH_TYPE_KERNEL_NOLOAD) ||
 240              (images.os.type == IH_TYPE_MULTI)) &&
 241             (images.os.os == IH_OS_LINUX ||
 242                  images.os.os == IH_OS_VXWORKS))
 243                 return bootm_find_ramdisk_fdt(flag, argc, argv);
 244
 245         return 0;
 246 }
 247
 248 /**
 249  * decomp_image() - decompress the operating system
 250  *
 251  * @comp:       Compression algorithm that is used (IH_COMP_...)
 252  * @load:       Destination load address in U-Boot memory
 253  * @image_start Image start address (where we are decompressing from)
 254  * @type:       OS type (IH_OS_...)
 255  * @load_bug:   Place to decompress to
 256  * @image_buf:  Address to decompress from
 257  * @return 0 if OK, -ve on error (BOOTM_ERR_...)
 258  */
 259 static int decomp_image(int comp, ulong load, ulong image_start, int type,
 260                         void *load_buf, void *image_buf, ulong image_len,
 261                         ulong *load_end)
 262 {
 263         const char *type_name = genimg_get_type_name(type);
 264         __attribute__((unused)) uint unc_len = CONFIG_SYS_BOOTM_LEN;
 265
 266         *load_end = load;
 267         switch (comp) {
 268         case IH_COMP_NONE:
 269                 if (load == image_start) {
 270                         printf("   XIP %s ... ", type_name);
 271                 } else {
 272                         printf("   Loading %s ... ", type_name);
 273                         memmove_wd(load_buf, image_buf, image_len, CHUNKSZ);
 274                 }
 275                 *load_end = load + image_len;
 276                 break;
 277 #ifdef CONFIG_GZIP
 278         case IH_COMP_GZIP:
 279                 printf("   Uncompressing %s ... ", type_name);
 280                 if (gunzip(load_buf, unc_len, image_buf, &image_len) != 0) {
 281                         puts("GUNZIP: uncompress, out-of-mem or overwrite error - must RESET board to recover\n");
 282                         return BOOTM_ERR_RESET;
 283                 }
 284
 285                 *load_end = load + image_len;
 286                 break;
 287 #endif /* CONFIG_GZIP */
 288 #ifdef CONFIG_BZIP2
 289         case IH_COMP_BZIP2:
 290                 printf("   Uncompressing %s ... ", type_name);
 291                 /*
 292                  * If we've got less than 4 MB of malloc() space,
 293                  * use slower decompression algorithm which requires
 294                  * at most 2300 KB of memory.
 295                  */
 296                 int i = BZ2_bzBuffToBuffDecompress(load_buf, &unc_len,
 297                         image_buf, image_len,
 298                         CONFIG_SYS_MALLOC_LEN < (4096 * 1024), 0);
 299                 if (i != BZ_OK) {
 300                         printf("BUNZIP2: uncompress or overwrite error %d - must RESET board to recover\n",
 301                                i);
 302                         return BOOTM_ERR_RESET;
 303                 }
 304
 305                 *load_end = load + unc_len;
 306                 break;
 307 #endif /* CONFIG_BZIP2 */
 308 #ifdef CONFIG_LZMA
 309         case IH_COMP_LZMA: {
 310                 SizeT lzma_len = unc_len;
 311                 int ret;
 312
 313                 printf("   Uncompressing %s ... ", type_name);
 314
 315                 ret = lzmaBuffToBuffDecompress(load_buf, &lzma_len,
 316                                                image_buf, image_len);
 317                 unc_len = lzma_len;
 318                 if (ret != SZ_OK) {
 319                         printf("LZMA: uncompress or overwrite error %d - must RESET board to recover\n",
 320                                ret);
 321                         bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
 322                         return BOOTM_ERR_RESET;
 323                 }
 324                 *load_end = load + unc_len;
 325                 break;
 326         }
 327 #endif /* CONFIG_LZMA */
 328 #ifdef CONFIG_LZO
 329         case IH_COMP_LZO: {
 330                 size_t size = unc_len;
 331                 int ret;
 332
 333                 printf("   Uncompressing %s ... ", type_name);
 334
 335                 ret = lzop_decompress(image_buf, image_len, load_buf, &size);
 336                 if (ret != LZO_E_OK) {
 337                         printf("LZO: uncompress or overwrite error %d - must RESET board to recover\n",
 338                                ret);
 339                         return BOOTM_ERR_RESET;
 340                 }
 341
 342                 *load_end = load + size;
 343                 break;
 344         }
 345 #endif /* CONFIG_LZO */
 346         default:
 347                 printf("Unimplemented compression type %d\n", comp);
 348                 return BOOTM_ERR_UNIMPLEMENTED;
 349         }
 350
 351         puts("OK\n");
 352
 353         return 0;
 354 }
 355
 356 static int bootm_load_os(bootm_headers_t *images, unsigned long *load_end,
 357                          int boot_progress)
 358 {
 359         image_info_t os = images->os;
 360         ulong load = os.load;
 361         ulong blob_start = os.start;
 362         ulong blob_end = os.end;
 363         ulong image_start = os.image_start;
 364         ulong image_len = os.image_len;
 365         bool no_overlap;
 366         void *load_buf, *image_buf;
 367         int err;
 368
 369         load_buf = map_sysmem(load, 0);
 370         image_buf = map_sysmem(os.image_start, image_len);
 371         err = decomp_image(os.comp, load, os.image_start, os.type, load_buf,
 372                            image_buf, image_len, load_end);
 373         if (err) {
 374                 bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
 375                 return err;
 376         }
 377         flush_cache(load, (*load_end - load) * sizeof(ulong));
 378
 379         debug("   kernel loaded at 0x%08lx, end = 0x%08lx\n", load, *load_end);
 380         bootstage_mark(BOOTSTAGE_ID_KERNEL_LOADED);
 381
 382         no_overlap = (os.comp == IH_COMP_NONE && load == image_start);
 383
 384         if (!no_overlap && (load < blob_end) && (*load_end > blob_start)) {
 385                 debug("images.os.start = 0x%lX, images.os.end = 0x%lx\n",
 386                       blob_start, blob_end);
 387                 debug("images.os.load = 0x%lx, load_end = 0x%lx\n", load,
 388                       *load_end);
 389
 390                 /* Check what type of image this is. */
 391                 if (images->legacy_hdr_valid) {
 392                         if (image_get_type(&images->legacy_hdr_os_copy)
 393                                         == IH_TYPE_MULTI)
 394                                 puts("WARNING: legacy format multi component image overwritten\n");
 395                         return BOOTM_ERR_OVERLAP;
 396                 } else {
 397                         puts("ERROR: new format image overwritten - must RESET the board to recover\n");
 398                         bootstage_error(BOOTSTAGE_ID_OVERWRITTEN);
 399                         return BOOTM_ERR_RESET;
 400                 }
 401         }
 402
 403         return 0;
 404 }
 405
 406 /**
 407  * bootm_disable_interrupts() - Disable interrupts in preparation for load/boot
 408  *
 409  * @return interrupt flag (0 if interrupts were disabled, non-zero if they were
 410  *      enabled)
 411  */
 412 ulong bootm_disable_interrupts(void)
 413 {
 414         ulong iflag;
 415
 416         /*
 417          * We have reached the point of no return: we are going to
 418          * overwrite all exception vector code, so we cannot easily
 419          * recover from any failures any more...
 420          */
 421         iflag = disable_interrupts();
 422 #ifdef CONFIG_NETCONSOLE
 423         /* Stop the ethernet stack if NetConsole could have left it up */
 424         eth_halt();
 425         eth_unregister(eth_get_dev());
 426 #endif
 427
 428 #if defined(CONFIG_CMD_USB)
 429         /*
 430          * turn off USB to prevent the host controller from writing to the
 431          * SDRAM while Linux is booting. This could happen (at least for OHCI
 432          * controller), because the HCCA (Host Controller Communication Area)
 433          * lies within the SDRAM and the host controller writes continously to
 434          * this area (as busmaster!). The HccaFrameNumber is for example
 435          * updated every 1 ms within the HCCA structure in SDRAM! For more
 436          * details see the OpenHCI specification.
 437          */
 438         usb_stop();
 439 #endif
 440         return iflag;
 441 }
 442
 443 #if defined(CONFIG_SILENT_CONSOLE) && !defined(CONFIG_SILENT_U_BOOT_ONLY)
 444
 445 #define CONSOLE_ARG     "console="
 446 #define CONSOLE_ARG_LEN (sizeof(CONSOLE_ARG) - 1)
 447
 448 static void fixup_silent_linux(void)
 449 {
 450         char *buf;
 451         const char *env_val;
 452         char *cmdline = getenv("bootargs");
 453         int want_silent;
 454
 455         /*
 456          * Only fix cmdline when requested. The environment variable can be:
 457          *
 458          *      no - we never fixup
 459          *      yes - we always fixup
 460          *      unset - we rely on the console silent flag
 461          */
 462         want_silent = getenv_yesno("silent_linux");
 463         if (want_silent == 0)
 464                 return;
 465         else if (want_silent == -1 && !(gd->flags & GD_FLG_SILENT))
 466                 return;
 467
 468         debug("before silent fix-up: %s\n", cmdline);
 469         if (cmdline && (cmdline[0] != '\0')) {
 470                 char *start = strstr(cmdline, CONSOLE_ARG);
 471
 472                 /* Allocate space for maximum possible new command line */
 473                 buf = malloc(strlen(cmdline) + 1 + CONSOLE_ARG_LEN + 1);
 474                 if (!buf) {
 475                         debug("%s: out of memory\n", __func__);
 476                         return;
 477                 }
 478
 479                 if (start) {
 480                         char *end = strchr(start, ' ');
 481                         int num_start_bytes = start - cmdline + CONSOLE_ARG_LEN;
 482
 483                         strncpy(buf, cmdline, num_start_bytes);
 484                         if (end)
 485                                 strcpy(buf + num_start_bytes, end);
 486                         else
 487                                 buf[num_start_bytes] = '\0';
 488                 } else {
 489                         sprintf(buf, "%s %s", cmdline, CONSOLE_ARG);
 490                 }
 491                 env_val = buf;
 492         } else {
 493                 buf = NULL;
 494                 env_val = CONSOLE_ARG;
 495         }
 496
 497         setenv("bootargs", env_val);
 498         debug("after silent fix-up: %s\n", env_val);
 499         free(buf);
 500 }
 501 #endif /* CONFIG_SILENT_CONSOLE */
 502
 503 /**
 504  * Execute selected states of the bootm command.
 505  *
 506  * Note the arguments to this state must be the first argument, Any 'bootm'
 507  * or sub-command arguments must have already been taken.
 508  *
 509  * Note that if states contains more than one flag it MUST contain
 510  * BOOTM_STATE_START, since this handles and consumes the command line args.
 511  *
 512  * Also note that aside from boot_os_fn functions and bootm_load_os no other
 513  * functions we store the return value of in 'ret' may use a negative return
 514  * value, without special handling.
 515  *
 516  * @param cmdtp         Pointer to bootm command table entry
 517  * @param flag          Command flags (CMD_FLAG_...)
 518  * @param argc          Number of subcommand arguments (0 = no arguments)
 519  * @param argv          Arguments
 520  * @param states        Mask containing states to run (BOOTM_STATE_...)
 521  * @param images        Image header information
 522  * @param boot_progress 1 to show boot progress, 0 to not do this
 523  * @return 0 if ok, something else on error. Some errors will cause this
 524  *      function to perform a reboot! If states contains BOOTM_STATE_OS_GO
 525  *      then the intent is to boot an OS, so this function will not return
 526  *      unless the image type is standalone.
 527  */
 528 int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 529                     int states, bootm_headers_t *images, int boot_progress)
 530 {
 531         boot_os_fn *boot_fn;
 532         ulong iflag = 0;
 533         int ret = 0, need_boot_fn;
 534
 535         images->state |= states;
 536
 537         /*
 538          * Work through the states and see how far we get. We stop on
 539          * any error.
 540          */
 541         if (states & BOOTM_STATE_START)
 542                 ret = bootm_start(cmdtp, flag, argc, argv);
 543
 544         if (!ret && (states & BOOTM_STATE_FINDOS))
 545                 ret = bootm_find_os(cmdtp, flag, argc, argv);
 546
 547         if (!ret && (states & BOOTM_STATE_FINDOTHER)) {
 548                 ret = bootm_find_other(cmdtp, flag, argc, argv);
 549                 argc = 0;       /* consume the args */
 550         }
 551
 552         /* Load the OS */
 553         if (!ret && (states & BOOTM_STATE_LOADOS)) {
 554                 ulong load_end;
 555
 556                 iflag = bootm_disable_interrupts();
 557                 ret = bootm_load_os(images, &load_end, 0);
 558                 if (ret == 0)
 559                         lmb_reserve(&images->lmb, images->os.load,
 560                                     (load_end - images->os.load));
 561                 else if (ret && ret != BOOTM_ERR_OVERLAP)
 562                         goto err;
 563                 else if (ret == BOOTM_ERR_OVERLAP)
 564                         ret = 0;
 565 #if defined(CONFIG_SILENT_CONSOLE) && !defined(CONFIG_SILENT_U_BOOT_ONLY)
 566                 if (images->os.os == IH_OS_LINUX)
 567                         fixup_silent_linux();
 568 #endif
 569         }
 570
 571         /* Relocate the ramdisk */
 572 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
 573         if (!ret && (states & BOOTM_STATE_RAMDISK)) {
 574                 ulong rd_len = images->rd_end - images->rd_start;
 575
 576                 ret = boot_ramdisk_high(&images->lmb, images->rd_start,
 577                         rd_len, &images->initrd_start, &images->initrd_end);
 578                 if (!ret) {
 579                         setenv_hex("initrd_start", images->initrd_start);
 580                         setenv_hex("initrd_end", images->initrd_end);
 581                 }
 582         }
 583 #endif
 584 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_LMB)
 585         if (!ret && (states & BOOTM_STATE_FDT)) {
 586                 boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
 587                 ret = boot_relocate_fdt(&images->lmb, &images->ft_addr,
 588                                         &images->ft_len);
 589         }
 590 #endif
 591
 592         /* From now on, we need the OS boot function */
 593         if (ret)
 594                 return ret;
 595         boot_fn = bootm_os_get_boot_func(images->os.os);
 596         need_boot_fn = states & (BOOTM_STATE_OS_CMDLINE |
 597                         BOOTM_STATE_OS_BD_T | BOOTM_STATE_OS_PREP |
 598                         BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO);
 599         if (boot_fn == NULL && need_boot_fn) {
 600                 if (iflag)
 601                         enable_interrupts();
 602                 printf("ERROR: booting os '%s' (%d) is not supported\n",
 603                        genimg_get_os_name(images->os.os), images->os.os);
 604                 bootstage_error(BOOTSTAGE_ID_CHECK_BOOT_OS);
 605                 return 1;
 606         }
 607
 608         /* Call various other states that are not generally used */
 609         if (!ret && (states & BOOTM_STATE_OS_CMDLINE))
 610                 ret = boot_fn(BOOTM_STATE_OS_CMDLINE, argc, argv, images);
 611         if (!ret && (states & BOOTM_STATE_OS_BD_T))
 612                 ret = boot_fn(BOOTM_STATE_OS_BD_T, argc, argv, images);
 613         if (!ret && (states & BOOTM_STATE_OS_PREP))
 614                 ret = boot_fn(BOOTM_STATE_OS_PREP, argc, argv, images);
 615
 616 #ifdef CONFIG_TRACE
 617         /* Pretend to run the OS, then run a user command */
 618         if (!ret && (states & BOOTM_STATE_OS_FAKE_GO)) {
 619                 char *cmd_list = getenv("fakegocmd");
 620
 621                 ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_FAKE_GO,
 622                                 images, boot_fn);
 623                 if (!ret && cmd_list)
 624                         ret = run_command_list(cmd_list, -1, flag);
 625         }
 626 #endif
 627
 628         /* Check for unsupported subcommand. */
 629         if (ret) {
 630                 puts("subcommand not supported\n");
 631                 return ret;
 632         }
 633
 634         /* Now run the OS! We hope this doesn't return */
 635         if (!ret && (states & BOOTM_STATE_OS_GO))
 636                 ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_GO,
 637                                 images, boot_fn);
 638
 639         /* Deal with any fallout */
 640 err:
 641         if (iflag)
 642                 enable_interrupts();
 643
 644         if (ret == BOOTM_ERR_UNIMPLEMENTED)
 645                 bootstage_error(BOOTSTAGE_ID_DECOMP_UNIMPL);
 646         else if (ret == BOOTM_ERR_RESET)
 647                 do_reset(cmdtp, flag, argc, argv);
 648
 649         return ret;
 650 }
 651
 652 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
 653 /**
 654  * image_get_kernel - verify legacy format kernel image
 655  * @img_addr: in RAM address of the legacy format image to be verified
 656  * @verify: data CRC verification flag
 657  *
 658  * image_get_kernel() verifies legacy image integrity and returns pointer to
 659  * legacy image header if image verification was completed successfully.
 660  *
 661  * returns:
 662  *     pointer to a legacy image header if valid image was found
 663  *     otherwise return NULL
 664  */
 665 static image_header_t *image_get_kernel(ulong img_addr, int verify)
 666 {
 667         image_header_t *hdr = (image_header_t *)img_addr;
 668
 669         if (!image_check_magic(hdr)) {
 670                 puts("Bad Magic Number\n");
 671                 bootstage_error(BOOTSTAGE_ID_CHECK_MAGIC);
 672                 return NULL;
 673         }
 674         bootstage_mark(BOOTSTAGE_ID_CHECK_HEADER);
 675
 676         if (!image_check_hcrc(hdr)) {
 677                 puts("Bad Header Checksum\n");
 678                 bootstage_error(BOOTSTAGE_ID_CHECK_HEADER);
 679                 return NULL;
 680         }
 681
 682         bootstage_mark(BOOTSTAGE_ID_CHECK_CHECKSUM);
 683         image_print_contents(hdr);
 684
 685         if (verify) {
 686                 puts("   Verifying Checksum ... ");
 687                 if (!image_check_dcrc(hdr)) {
 688                         printf("Bad Data CRC\n");
 689                         bootstage_error(BOOTSTAGE_ID_CHECK_CHECKSUM);
 690                         return NULL;
 691                 }
 692                 puts("OK\n");
 693         }
 694         bootstage_mark(BOOTSTAGE_ID_CHECK_ARCH);
 695
 696         if (!image_check_target_arch(hdr)) {
 697                 printf("Unsupported Architecture 0x%x\n", image_get_arch(hdr));
 698                 bootstage_error(BOOTSTAGE_ID_CHECK_ARCH);
 699                 return NULL;
 700         }
 701         return hdr;
 702 }
 703 #endif
 704
 705 /**
 706  * boot_get_kernel - find kernel image
 707  * @os_data: pointer to a ulong variable, will hold os data start address
 708  * @os_len: pointer to a ulong variable, will hold os data length
 709  *
 710  * boot_get_kernel() tries to find a kernel image, verifies its integrity
 711  * and locates kernel data.
 712  *
 713  * returns:
 714  *     pointer to image header if valid image was found, plus kernel start
 715  *     address and length, otherwise NULL
 716  */
 717 static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
 718                                    char * const argv[], bootm_headers_t *images,
 719                                    ulong *os_data, ulong *os_len)
 720 {
 721 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
 722         image_header_t  *hdr;
 723 #endif
 724         ulong           img_addr;
 725         const void *buf;
 726 #if defined(CONFIG_FIT)
 727         const char      *fit_uname_config = NULL;
 728         const char      *fit_uname_kernel = NULL;
 729         int             os_noffset;
 730 #endif
 731
 732         /* find out kernel image address */
 733         if (argc < 1) {
 734                 img_addr = load_addr;
 735                 debug("*  kernel: default image load address = 0x%08lx\n",
 736                       load_addr);
 737 #if defined(CONFIG_FIT)
 738         } else if (fit_parse_conf(argv[0], load_addr, &img_addr,
 739                                   &fit_uname_config)) {
 740                 debug("*  kernel: config '%s' from image at 0x%08lx\n",
 741                       fit_uname_config, img_addr);
 742         } else if (fit_parse_subimage(argv[0], load_addr, &img_addr,
 743                                      &fit_uname_kernel)) {
 744                 debug("*  kernel: subimage '%s' from image at 0x%08lx\n",
 745                       fit_uname_kernel, img_addr);
 746 #endif
 747         } else {
 748                 img_addr = simple_strtoul(argv[0], NULL, 16);
 749                 debug("*  kernel: cmdline image address = 0x%08lx\n",
 750                       img_addr);
 751         }
 752
 753         bootstage_mark(BOOTSTAGE_ID_CHECK_MAGIC);
 754
 755         /* copy from dataflash if needed */
 756         img_addr = genimg_get_image(img_addr);
 757
 758         /* check image type, for FIT images get FIT kernel node */
 759         *os_data = *os_len = 0;
 760         buf = map_sysmem(img_addr, 0);
 761         switch (genimg_get_format(buf)) {
 762 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
 763         case IMAGE_FORMAT_LEGACY:
 764                 printf("## Booting kernel from Legacy Image at %08lx ...\n",
 765                        img_addr);
 766                 hdr = image_get_kernel(img_addr, images->verify);
 767                 if (!hdr)
 768                         return NULL;
 769                 bootstage_mark(BOOTSTAGE_ID_CHECK_IMAGETYPE);
 770
 771                 /* get os_data and os_len */
 772                 switch (image_get_type(hdr)) {
 773                 case IH_TYPE_KERNEL:
 774                 case IH_TYPE_KERNEL_NOLOAD:
 775                         *os_data = image_get_data(hdr);
 776                         *os_len = image_get_data_size(hdr);
 777                         break;
 778                 case IH_TYPE_MULTI:
 779                         image_multi_getimg(hdr, 0, os_data, os_len);
 780                         break;
 781                 case IH_TYPE_STANDALONE:
 782                         *os_data = image_get_data(hdr);
 783                         *os_len = image_get_data_size(hdr);
 784                         break;
 785                 default:
 786                         printf("Wrong Image Type for %s command\n",
 787                                cmdtp->name);
 788                         bootstage_error(BOOTSTAGE_ID_CHECK_IMAGETYPE);
 789                         return NULL;
 790                 }
 791
 792                 /*
 793                  * copy image header to allow for image overwrites during
 794                  * kernel decompression.
 795                  */
 796                 memmove(&images->legacy_hdr_os_copy, hdr,
 797                         sizeof(image_header_t));
 798
 799                 /* save pointer to image header */
 800                 images->legacy_hdr_os = hdr;
 801
 802                 images->legacy_hdr_valid = 1;
 803                 bootstage_mark(BOOTSTAGE_ID_DECOMP_IMAGE);
 804                 break;
 805 #endif
 806 #if defined(CONFIG_FIT)
 807         case IMAGE_FORMAT_FIT:
 808                 os_noffset = fit_image_load(images, img_addr,
 809                                 &fit_uname_kernel, &fit_uname_config,
 810                                 IH_ARCH_DEFAULT, IH_TYPE_KERNEL,
 811                                 BOOTSTAGE_ID_FIT_KERNEL_START,
 812                                 FIT_LOAD_IGNORED, os_data, os_len);
 813                 if (os_noffset < 0)
 814                         return NULL;
 815
 816                 images->fit_hdr_os = map_sysmem(img_addr, 0);
 817                 images->fit_uname_os = fit_uname_kernel;
 818                 images->fit_uname_cfg = fit_uname_config;
 819                 images->fit_noffset_os = os_noffset;
 820                 break;
 821 #endif
 822 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 823         case IMAGE_FORMAT_ANDROID:
 824                 printf("## Booting Android Image at 0x%08lx ...\n", img_addr);
 825                 if (android_image_get_kernel(buf, images->verify,
 826                                              os_data, os_len))
 827                         return NULL;
 828                 break;
 829 #endif
 830         default:
 831                 printf("Wrong Image Format for %s command\n", cmdtp->name);
 832                 bootstage_error(BOOTSTAGE_ID_FIT_KERNEL_INFO);
 833                 return NULL;
 834         }
 835
 836         debug("   kernel data at 0x%08lx, len = 0x%08lx (%ld)\n",
 837               *os_data, *os_len, *os_len);
 838
 839         return buf;
 840 }
 841
 842 #endif /* ndef USE_HOSTCC */