common/bootm.c

   1 /*
   2  * (C) Copyright 2000-2009
   3  * Wolfgang Denk, DENX Software Engineering, [email protected].
   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 <errno.h>
  13 #include <fdt_support.h>
  14 #include <lmb.h>
  15 #include <malloc.h>
  16 #include <asm/io.h>
  17 #include <linux/lzo.h>
  18 #include <lzma/LzmaTypes.h>
  19 #include <lzma/LzmaDec.h>
  20 #include <lzma/LzmaTools.h>
  21 #if defined(CONFIG_CMD_USB)
  22 #include <usb.h>
  23 #endif
  24 #else
  25 #include "mkimage.h"
  26 #endif
  27
  28 #include <command.h>
  29 #include <bootm.h>
  30 #include <image.h>
  31
  32 #ifndef CONFIG_SYS_BOOTM_LEN
  33 /* use 8MByte as default max gunzip size */
  34 #define CONFIG_SYS_BOOTM_LEN    0x800000
  35 #endif
  36
  37 #define IH_INITRD_ARCH IH_ARCH_DEFAULT
  38
  39 #ifndef USE_HOSTCC
  40
  41 DECLARE_GLOBAL_DATA_PTR;
  42
  43 static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
  44                                    char * const argv[], bootm_headers_t *images,
  45                                    ulong *os_data, ulong *os_len);
  46
  47 #ifdef CONFIG_LMB
  48 static void boot_start_lmb(bootm_headers_t *images)
  49 {
  50         ulong           mem_start;
  51         phys_size_t     mem_size;
  52
  53         lmb_init(&images->lmb);
  54
  55         mem_start = getenv_bootm_low();
  56         mem_size = getenv_bootm_size();
  57
  58         lmb_add(&images->lmb, (phys_addr_t)mem_start, mem_size);
  59
  60         arch_lmb_reserve(&images->lmb);
  61         board_lmb_reserve(&images->lmb);
  62 }
  63 #else
  64 #define lmb_reserve(lmb, base, size)
  65 static inline void boot_start_lmb(bootm_headers_t *images) { }
  66 #endif
  67
  68 static int bootm_start(cmd_tbl_t *cmdtp, int flag, int argc,
  69                        char * const argv[])
  70 {
  71         memset((void *)&images, 0, sizeof(images));
  72         images.verify = getenv_yesno("verify");
  73
  74         boot_start_lmb(&images);
  75
  76         bootstage_mark_name(BOOTSTAGE_ID_BOOTM_START, "bootm_start");
  77         images.state = BOOTM_STATE_START;
  78
  79         return 0;
  80 }
  81
  82 static int bootm_find_os(cmd_tbl_t *cmdtp, int flag, int argc,
  83                          char * const argv[])
  84 {
  85         const void *os_hdr;
  86         bool ep_found = false;
  87         int ret;
  88
  89         /* get kernel image header, start address and length */
  90         os_hdr = boot_get_kernel(cmdtp, flag, argc, argv,
  91                         &images, &images.os.image_start, &images.os.image_len);
  92         if (images.os.image_len == 0) {
  93                 puts("ERROR: can't get kernel image!\n");
  94                 return 1;
  95         }
  96
  97         /* get image parameters */
  98         switch (genimg_get_format(os_hdr)) {
  99 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
 100         case IMAGE_FORMAT_LEGACY:
 101                 images.os.type = image_get_type(os_hdr);
 102                 images.os.comp = image_get_comp(os_hdr);
 103                 images.os.os = image_get_os(os_hdr);
 104
 105                 images.os.end = image_get_image_end(os_hdr);
 106                 images.os.load = image_get_load(os_hdr);
 107                 images.os.arch = image_get_arch(os_hdr);
 108                 break;
 109 #endif
 110 #if defined(CONFIG_FIT)
 111         case IMAGE_FORMAT_FIT:
 112                 if (fit_image_get_type(images.fit_hdr_os,
 113                                        images.fit_noffset_os,
 114                                        &images.os.type)) {
 115                         puts("Can't get image type!\n");
 116                         bootstage_error(BOOTSTAGE_ID_FIT_TYPE);
 117                         return 1;
 118                 }
 119
 120                 if (fit_image_get_comp(images.fit_hdr_os,
 121                                        images.fit_noffset_os,
 122                                        &images.os.comp)) {
 123                         puts("Can't get image compression!\n");
 124                         bootstage_error(BOOTSTAGE_ID_FIT_COMPRESSION);
 125                         return 1;
 126                 }
 127
 128                 if (fit_image_get_os(images.fit_hdr_os, images.fit_noffset_os,
 129                                      &images.os.os)) {
 130                         puts("Can't get image OS!\n");
 131                         bootstage_error(BOOTSTAGE_ID_FIT_OS);
 132                         return 1;
 133                 }
 134
 135                 if (fit_image_get_arch(images.fit_hdr_os,
 136                                        images.fit_noffset_os,
 137                                        &images.os.arch)) {
 138                         puts("Can't get image ARCH!\n");
 139                         return 1;
 140                 }
 141
 142                 images.os.end = fit_get_end(images.fit_hdr_os);
 143
 144                 if (fit_image_get_load(images.fit_hdr_os, images.fit_noffset_os,
 145                                        &images.os.load)) {
 146                         puts("Can't get image load address!\n");
 147                         bootstage_error(BOOTSTAGE_ID_FIT_LOADADDR);
 148                         return 1;
 149                 }
 150                 break;
 151 #endif
 152 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 153         case IMAGE_FORMAT_ANDROID:
 154                 images.os.type = IH_TYPE_KERNEL;
 155                 images.os.comp = IH_COMP_NONE;
 156                 images.os.os = IH_OS_LINUX;
 157
 158                 images.os.end = android_image_get_end(os_hdr);
 159                 images.os.load = android_image_get_kload(os_hdr);
 160                 images.ep = images.os.load;
 161                 ep_found = true;
 162                 break;
 163 #endif
 164         default:
 165                 puts("ERROR: unknown image format type!\n");
 166                 return 1;
 167         }
 168
 169         /* If we have a valid setup.bin, we will use that for entry (x86) */
 170         if (images.os.arch == IH_ARCH_I386 ||
 171             images.os.arch == IH_ARCH_X86_64) {
 172                 ulong len;
 173
 174                 ret = boot_get_setup(&images, IH_ARCH_I386, &images.ep, &len);
 175                 if (ret < 0 && ret != -ENOENT) {
 176                         puts("Could not find a valid setup.bin for x86\n");
 177                         return 1;
 178                 }
 179                 /* Kernel entry point is the setup.bin */
 180         } else if (images.legacy_hdr_valid) {
 181                 images.ep = image_get_ep(&images.legacy_hdr_os_copy);
 182 #if defined(CONFIG_FIT)
 183         } else if (images.fit_uname_os) {
 184                 int ret;
 185
 186                 ret = fit_image_get_entry(images.fit_hdr_os,
 187                                           images.fit_noffset_os, &images.ep);
 188                 if (ret) {
 189                         puts("Can't get entry point property!\n");
 190                         return 1;
 191                 }
 192 #endif
 193         } else if (!ep_found) {
 194                 puts("Could not find kernel entry point!\n");
 195                 return 1;
 196         }
 197
 198         if (images.os.type == IH_TYPE_KERNEL_NOLOAD) {
 199                 images.os.load = images.os.image_start;
 200                 images.ep += images.os.load;
 201         }
 202
 203         images.os.start = (ulong)os_hdr;
 204
 205         return 0;
 206 }
 207
 208 static int bootm_find_ramdisk(int flag, int argc, char * const argv[])
 209 {
 210         int ret;
 211
 212         /* find ramdisk */
 213         ret = boot_get_ramdisk(argc, argv, &images, IH_INITRD_ARCH,
 214                                &images.rd_start, &images.rd_end);
 215         if (ret) {
 216                 puts("Ramdisk image is corrupt or invalid\n");
 217                 return 1;
 218         }
 219
 220         return 0;
 221 }
 222
 223 #if defined(CONFIG_OF_LIBFDT)
 224 static int bootm_find_fdt(int flag, int argc, char * const argv[])
 225 {
 226         int ret;
 227
 228         /* find flattened device tree */
 229         ret = boot_get_fdt(flag, argc, argv, IH_ARCH_DEFAULT, &images,
 230                            &images.ft_addr, &images.ft_len);
 231         if (ret) {
 232                 puts("Could not find a valid device tree\n");
 233                 return 1;
 234         }
 235
 236         set_working_fdt_addr(images.ft_addr);
 237
 238         return 0;
 239 }
 240 #endif
 241
 242 int bootm_find_ramdisk_fdt(int flag, int argc, char * const argv[])
 243 {
 244         if (bootm_find_ramdisk(flag, argc, argv))
 245                 return 1;
 246
 247 #if defined(CONFIG_OF_LIBFDT)
 248         if (bootm_find_fdt(flag, argc, argv))
 249                 return 1;
 250 #endif
 251
 252         return 0;
 253 }
 254
 255 static int bootm_find_other(cmd_tbl_t *cmdtp, int flag, int argc,
 256                             char * const argv[])
 257 {
 258         if (((images.os.type == IH_TYPE_KERNEL) ||
 259              (images.os.type == IH_TYPE_KERNEL_NOLOAD) ||
 260              (images.os.type == IH_TYPE_MULTI)) &&
 261             (images.os.os == IH_OS_LINUX ||
 262                  images.os.os == IH_OS_VXWORKS))
 263                 return bootm_find_ramdisk_fdt(flag, argc, argv);
 264
 265         return 0;
 266 }
 267 #endif /* USE_HOSTC */
 268
 269 /**
 270  * print_decomp_msg() - Print a suitable decompression/loading message
 271  *
 272  * @type:       OS type (IH_OS_...)
 273  * @comp_type:  Compression type being used (IH_COMP_...)
 274  * @is_xip:     true if the load address matches the image start
 275  */
 276 static void print_decomp_msg(int comp_type, int type, bool is_xip)
 277 {
 278         const char *name = genimg_get_type_name(type);
 279
 280         if (comp_type == IH_COMP_NONE)
 281                 printf("   %s %s ... ", is_xip ? "XIP" : "Loading", name);
 282         else
 283                 printf("   Uncompressing %s ... ", name);
 284 }
 285
 286 #if defined(CONFIG_GZIP) || defined(CONFIG_GZIP) || defined(CONFIG_BZIP2) || \
 287         defined(CONFIG_LZMA) || defined(CONFIG_LZO)
 288 static int handle_decomp_error(const char *algo, size_t size, size_t unc_len,
 289                                int ret)
 290 {
 291         if (size >= unc_len)
 292                 puts("Image too large: increase CONFIG_SYS_BOOTM_LEN\n");
 293         else
 294                 printf("%s: uncompress or overwrite error %d\n", algo, ret);
 295         puts("Must RESET board to recover\n");
 296 #ifndef USE_HOSTCC
 297         bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
 298 #endif
 299
 300         return BOOTM_ERR_RESET;
 301 }
 302 #endif
 303
 304 int bootm_decomp_image(int comp, ulong load, ulong image_start, int type,
 305                        void *load_buf, void *image_buf, ulong image_len,
 306                        uint unc_len, ulong *load_end)
 307 {
 308         *load_end = load;
 309         print_decomp_msg(comp, type, load == image_start);
 310         switch (comp) {
 311         case IH_COMP_NONE:
 312                 if (load != image_start)
 313                         memmove_wd(load_buf, image_buf, image_len, CHUNKSZ);
 314                 *load_end = load + image_len;
 315                 break;
 316 #ifdef CONFIG_GZIP
 317         case IH_COMP_GZIP: {
 318                 int ret;
 319
 320                 ret = gunzip(load_buf, unc_len, image_buf, &image_len);
 321                 if (ret != 0) {
 322                         return handle_decomp_error("GUNZIP", image_len,
 323                                                    unc_len, ret);
 324                 }
 325
 326                 *load_end = load + image_len;
 327                 break;
 328         }
 329 #endif /* CONFIG_GZIP */
 330 #ifdef CONFIG_BZIP2
 331         case IH_COMP_BZIP2: {
 332                 size_t size = unc_len;
 333
 334                 /*
 335                  * If we've got less than 4 MB of malloc() space,
 336                  * use slower decompression algorithm which requires
 337                  * at most 2300 KB of memory.
 338                  */
 339                 int i = BZ2_bzBuffToBuffDecompress(load_buf, &unc_len,
 340                         image_buf, image_len,
 341                         CONFIG_SYS_MALLOC_LEN < (4096 * 1024), 0);
 342                 if (i != BZ_OK) {
 343                         return handle_decomp_error("BUNZIP2", size, unc_len,
 344                                                    i);
 345                 }
 346
 347                 *load_end = load + unc_len;
 348                 break;
 349         }
 350 #endif /* CONFIG_BZIP2 */
 351 #ifdef CONFIG_LZMA
 352         case IH_COMP_LZMA: {
 353                 SizeT lzma_len = unc_len;
 354                 int ret;
 355
 356                 ret = lzmaBuffToBuffDecompress(load_buf, &lzma_len,
 357                                                image_buf, image_len);
 358                 if (ret != SZ_OK) {
 359                         return handle_decomp_error("LZMA", lzma_len, unc_len,
 360                                                    ret);
 361                 }
 362                 unc_len = lzma_len;
 363                 *load_end = load + unc_len;
 364                 break;
 365         }
 366 #endif /* CONFIG_LZMA */
 367 #ifdef CONFIG_LZO
 368         case IH_COMP_LZO: {
 369                 size_t size = unc_len;
 370                 int ret;
 371
 372                 ret = lzop_decompress(image_buf, image_len, load_buf, &size);
 373                 if (ret != LZO_E_OK)
 374                         return handle_decomp_error("LZO", size, unc_len, ret);
 375
 376                 *load_end = load + size;
 377                 break;
 378         }
 379 #endif /* CONFIG_LZO */
 380         default:
 381                 printf("Unimplemented compression type %d\n", comp);
 382                 return BOOTM_ERR_UNIMPLEMENTED;
 383         }
 384
 385         puts("OK\n");
 386
 387         return 0;
 388 }
 389
 390 #ifndef USE_HOSTCC
 391 static int bootm_load_os(bootm_headers_t *images, unsigned long *load_end,
 392                          int boot_progress)
 393 {
 394         image_info_t os = images->os;
 395         ulong load = os.load;
 396         ulong blob_start = os.start;
 397         ulong blob_end = os.end;
 398         ulong image_start = os.image_start;
 399         ulong image_len = os.image_len;
 400         bool no_overlap;
 401         void *load_buf, *image_buf;
 402         int err;
 403
 404         load_buf = map_sysmem(load, 0);
 405         image_buf = map_sysmem(os.image_start, image_len);
 406         err = bootm_decomp_image(os.comp, load, os.image_start, os.type,
 407                                  load_buf, image_buf, image_len,
 408                                  CONFIG_SYS_BOOTM_LEN, load_end);
 409         if (err) {
 410                 bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
 411                 return err;
 412         }
 413         flush_cache(load, (*load_end - load) * sizeof(ulong));
 414
 415         debug("   kernel loaded at 0x%08lx, end = 0x%08lx\n", load, *load_end);
 416         bootstage_mark(BOOTSTAGE_ID_KERNEL_LOADED);
 417
 418         no_overlap = (os.comp == IH_COMP_NONE && load == image_start);
 419
 420         if (!no_overlap && (load < blob_end) && (*load_end > blob_start)) {
 421                 debug("images.os.start = 0x%lX, images.os.end = 0x%lx\n",
 422                       blob_start, blob_end);
 423                 debug("images.os.load = 0x%lx, load_end = 0x%lx\n", load,
 424                       *load_end);
 425
 426                 /* Check what type of image this is. */
 427                 if (images->legacy_hdr_valid) {
 428                         if (image_get_type(&images->legacy_hdr_os_copy)
 429                                         == IH_TYPE_MULTI)
 430                                 puts("WARNING: legacy format multi component image overwritten\n");
 431                         return BOOTM_ERR_OVERLAP;
 432                 } else {
 433                         puts("ERROR: new format image overwritten - must RESET the board to recover\n");
 434                         bootstage_error(BOOTSTAGE_ID_OVERWRITTEN);
 435                         return BOOTM_ERR_RESET;
 436                 }
 437         }
 438
 439         return 0;
 440 }
 441
 442 /**
 443  * bootm_disable_interrupts() - Disable interrupts in preparation for load/boot
 444  *
 445  * @return interrupt flag (0 if interrupts were disabled, non-zero if they were
 446  *      enabled)
 447  */
 448 ulong bootm_disable_interrupts(void)
 449 {
 450         ulong iflag;
 451
 452         /*
 453          * We have reached the point of no return: we are going to
 454          * overwrite all exception vector code, so we cannot easily
 455          * recover from any failures any more...
 456          */
 457         iflag = disable_interrupts();
 458 #ifdef CONFIG_NETCONSOLE
 459         /* Stop the ethernet stack if NetConsole could have left it up */
 460         eth_halt();
 461         eth_unregister(eth_get_dev());
 462 #endif
 463
 464 #if defined(CONFIG_CMD_USB)
 465         /*
 466          * turn off USB to prevent the host controller from writing to the
 467          * SDRAM while Linux is booting. This could happen (at least for OHCI
 468          * controller), because the HCCA (Host Controller Communication Area)
 469          * lies within the SDRAM and the host controller writes continously to
 470          * this area (as busmaster!). The HccaFrameNumber is for example
 471          * updated every 1 ms within the HCCA structure in SDRAM! For more
 472          * details see the OpenHCI specification.
 473          */
 474         usb_stop();
 475 #endif
 476         return iflag;
 477 }
 478
 479 #if defined(CONFIG_SILENT_CONSOLE) && !defined(CONFIG_SILENT_U_BOOT_ONLY)
 480
 481 #define CONSOLE_ARG     "console="
 482 #define CONSOLE_ARG_LEN (sizeof(CONSOLE_ARG) - 1)
 483
 484 static void fixup_silent_linux(void)
 485 {
 486         char *buf;
 487         const char *env_val;
 488         char *cmdline = getenv("bootargs");
 489         int want_silent;
 490
 491         /*
 492          * Only fix cmdline when requested. The environment variable can be:
 493          *
 494          *      no - we never fixup
 495          *      yes - we always fixup
 496          *      unset - we rely on the console silent flag
 497          */
 498         want_silent = getenv_yesno("silent_linux");
 499         if (want_silent == 0)
 500                 return;
 501         else if (want_silent == -1 && !(gd->flags & GD_FLG_SILENT))
 502                 return;
 503
 504         debug("before silent fix-up: %s\n", cmdline);
 505         if (cmdline && (cmdline[0] != '\0')) {
 506                 char *start = strstr(cmdline, CONSOLE_ARG);
 507
 508                 /* Allocate space for maximum possible new command line */
 509                 buf = malloc(strlen(cmdline) + 1 + CONSOLE_ARG_LEN + 1);
 510                 if (!buf) {
 511                         debug("%s: out of memory\n", __func__);
 512                         return;
 513                 }
 514
 515                 if (start) {
 516                         char *end = strchr(start, ' ');
 517                         int num_start_bytes = start - cmdline + CONSOLE_ARG_LEN;
 518
 519                         strncpy(buf, cmdline, num_start_bytes);
 520                         if (end)
 521                                 strcpy(buf + num_start_bytes, end);
 522                         else
 523                                 buf[num_start_bytes] = '\0';
 524                 } else {
 525                         sprintf(buf, "%s %s", cmdline, CONSOLE_ARG);
 526                 }
 527                 env_val = buf;
 528         } else {
 529                 buf = NULL;
 530                 env_val = CONSOLE_ARG;
 531         }
 532
 533         setenv("bootargs", env_val);
 534         debug("after silent fix-up: %s\n", env_val);
 535         free(buf);
 536 }
 537 #endif /* CONFIG_SILENT_CONSOLE */
 538
 539 /**
 540  * Execute selected states of the bootm command.
 541  *
 542  * Note the arguments to this state must be the first argument, Any 'bootm'
 543  * or sub-command arguments must have already been taken.
 544  *
 545  * Note that if states contains more than one flag it MUST contain
 546  * BOOTM_STATE_START, since this handles and consumes the command line args.
 547  *
 548  * Also note that aside from boot_os_fn functions and bootm_load_os no other
 549  * functions we store the return value of in 'ret' may use a negative return
 550  * value, without special handling.
 551  *
 552  * @param cmdtp         Pointer to bootm command table entry
 553  * @param flag          Command flags (CMD_FLAG_...)
 554  * @param argc          Number of subcommand arguments (0 = no arguments)
 555  * @param argv          Arguments
 556  * @param states        Mask containing states to run (BOOTM_STATE_...)
 557  * @param images        Image header information
 558  * @param boot_progress 1 to show boot progress, 0 to not do this
 559  * @return 0 if ok, something else on error. Some errors will cause this
 560  *      function to perform a reboot! If states contains BOOTM_STATE_OS_GO
 561  *      then the intent is to boot an OS, so this function will not return
 562  *      unless the image type is standalone.
 563  */
 564 int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 565                     int states, bootm_headers_t *images, int boot_progress)
 566 {
 567         boot_os_fn *boot_fn;
 568         ulong iflag = 0;
 569         int ret = 0, need_boot_fn;
 570
 571         images->state |= states;
 572
 573         /*
 574          * Work through the states and see how far we get. We stop on
 575          * any error.
 576          */
 577         if (states & BOOTM_STATE_START)
 578                 ret = bootm_start(cmdtp, flag, argc, argv);
 579
 580         if (!ret && (states & BOOTM_STATE_FINDOS))
 581                 ret = bootm_find_os(cmdtp, flag, argc, argv);
 582
 583         if (!ret && (states & BOOTM_STATE_FINDOTHER)) {
 584                 ret = bootm_find_other(cmdtp, flag, argc, argv);
 585                 argc = 0;       /* consume the args */
 586         }
 587
 588         /* Load the OS */
 589         if (!ret && (states & BOOTM_STATE_LOADOS)) {
 590                 ulong load_end;
 591
 592                 iflag = bootm_disable_interrupts();
 593                 ret = bootm_load_os(images, &load_end, 0);
 594                 if (ret == 0)
 595                         lmb_reserve(&images->lmb, images->os.load,
 596                                     (load_end - images->os.load));
 597                 else if (ret && ret != BOOTM_ERR_OVERLAP)
 598                         goto err;
 599                 else if (ret == BOOTM_ERR_OVERLAP)
 600                         ret = 0;
 601 #if defined(CONFIG_SILENT_CONSOLE) && !defined(CONFIG_SILENT_U_BOOT_ONLY)
 602                 if (images->os.os == IH_OS_LINUX)
 603                         fixup_silent_linux();
 604 #endif
 605         }
 606
 607         /* Relocate the ramdisk */
 608 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
 609         if (!ret && (states & BOOTM_STATE_RAMDISK)) {
 610                 ulong rd_len = images->rd_end - images->rd_start;
 611
 612                 ret = boot_ramdisk_high(&images->lmb, images->rd_start,
 613                         rd_len, &images->initrd_start, &images->initrd_end);
 614                 if (!ret) {
 615                         setenv_hex("initrd_start", images->initrd_start);
 616                         setenv_hex("initrd_end", images->initrd_end);
 617                 }
 618         }
 619 #endif
 620 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_LMB)
 621         if (!ret && (states & BOOTM_STATE_FDT)) {
 622                 boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
 623                 ret = boot_relocate_fdt(&images->lmb, &images->ft_addr,
 624                                         &images->ft_len);
 625         }
 626 #endif
 627
 628         /* From now on, we need the OS boot function */
 629         if (ret)
 630                 return ret;
 631         boot_fn = bootm_os_get_boot_func(images->os.os);
 632         need_boot_fn = states & (BOOTM_STATE_OS_CMDLINE |
 633                         BOOTM_STATE_OS_BD_T | BOOTM_STATE_OS_PREP |
 634                         BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO);
 635         if (boot_fn == NULL && need_boot_fn) {
 636                 if (iflag)
 637                         enable_interrupts();
 638                 printf("ERROR: booting os '%s' (%d) is not supported\n",
 639                        genimg_get_os_name(images->os.os), images->os.os);
 640                 bootstage_error(BOOTSTAGE_ID_CHECK_BOOT_OS);
 641                 return 1;
 642         }
 643
 644         /* Call various other states that are not generally used */
 645         if (!ret && (states & BOOTM_STATE_OS_CMDLINE))
 646                 ret = boot_fn(BOOTM_STATE_OS_CMDLINE, argc, argv, images);
 647         if (!ret && (states & BOOTM_STATE_OS_BD_T))
 648                 ret = boot_fn(BOOTM_STATE_OS_BD_T, argc, argv, images);
 649         if (!ret && (states & BOOTM_STATE_OS_PREP))
 650                 ret = boot_fn(BOOTM_STATE_OS_PREP, argc, argv, images);
 651
 652 #ifdef CONFIG_TRACE
 653         /* Pretend to run the OS, then run a user command */
 654         if (!ret && (states & BOOTM_STATE_OS_FAKE_GO)) {
 655                 char *cmd_list = getenv("fakegocmd");
 656
 657                 ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_FAKE_GO,
 658                                 images, boot_fn);
 659                 if (!ret && cmd_list)
 660                         ret = run_command_list(cmd_list, -1, flag);
 661         }
 662 #endif
 663
 664         /* Check for unsupported subcommand. */
 665         if (ret) {
 666                 puts("subcommand not supported\n");
 667                 return ret;
 668         }
 669
 670         /* Now run the OS! We hope this doesn't return */
 671         if (!ret && (states & BOOTM_STATE_OS_GO))
 672                 ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_GO,
 673                                 images, boot_fn);
 674
 675         /* Deal with any fallout */
 676 err:
 677         if (iflag)
 678                 enable_interrupts();
 679
 680         if (ret == BOOTM_ERR_UNIMPLEMENTED)
 681                 bootstage_error(BOOTSTAGE_ID_DECOMP_UNIMPL);
 682         else if (ret == BOOTM_ERR_RESET)
 683                 do_reset(cmdtp, flag, argc, argv);
 684
 685         return ret;
 686 }
 687
 688 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
 689 /**
 690  * image_get_kernel - verify legacy format kernel image
 691  * @img_addr: in RAM address of the legacy format image to be verified
 692  * @verify: data CRC verification flag
 693  *
 694  * image_get_kernel() verifies legacy image integrity and returns pointer to
 695  * legacy image header if image verification was completed successfully.
 696  *
 697  * returns:
 698  *     pointer to a legacy image header if valid image was found
 699  *     otherwise return NULL
 700  */
 701 static image_header_t *image_get_kernel(ulong img_addr, int verify)
 702 {
 703         image_header_t *hdr = (image_header_t *)img_addr;
 704
 705         if (!image_check_magic(hdr)) {
 706                 puts("Bad Magic Number\n");
 707                 bootstage_error(BOOTSTAGE_ID_CHECK_MAGIC);
 708                 return NULL;
 709         }
 710         bootstage_mark(BOOTSTAGE_ID_CHECK_HEADER);
 711
 712         if (!image_check_hcrc(hdr)) {
 713                 puts("Bad Header Checksum\n");
 714                 bootstage_error(BOOTSTAGE_ID_CHECK_HEADER);
 715                 return NULL;
 716         }
 717
 718         bootstage_mark(BOOTSTAGE_ID_CHECK_CHECKSUM);
 719         image_print_contents(hdr);
 720
 721         if (verify) {
 722                 puts("   Verifying Checksum ... ");
 723                 if (!image_check_dcrc(hdr)) {
 724                         printf("Bad Data CRC\n");
 725                         bootstage_error(BOOTSTAGE_ID_CHECK_CHECKSUM);
 726                         return NULL;
 727                 }
 728                 puts("OK\n");
 729         }
 730         bootstage_mark(BOOTSTAGE_ID_CHECK_ARCH);
 731
 732         if (!image_check_target_arch(hdr)) {
 733                 printf("Unsupported Architecture 0x%x\n", image_get_arch(hdr));
 734                 bootstage_error(BOOTSTAGE_ID_CHECK_ARCH);
 735                 return NULL;
 736         }
 737         return hdr;
 738 }
 739 #endif
 740
 741 /**
 742  * boot_get_kernel - find kernel image
 743  * @os_data: pointer to a ulong variable, will hold os data start address
 744  * @os_len: pointer to a ulong variable, will hold os data length
 745  *
 746  * boot_get_kernel() tries to find a kernel image, verifies its integrity
 747  * and locates kernel data.
 748  *
 749  * returns:
 750  *     pointer to image header if valid image was found, plus kernel start
 751  *     address and length, otherwise NULL
 752  */
 753 static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
 754                                    char * const argv[], bootm_headers_t *images,
 755                                    ulong *os_data, ulong *os_len)
 756 {
 757 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
 758         image_header_t  *hdr;
 759 #endif
 760         ulong           img_addr;
 761         const void *buf;
 762         const char      *fit_uname_config = NULL;
 763         const char      *fit_uname_kernel = NULL;
 764 #if defined(CONFIG_FIT)
 765         int             os_noffset;
 766 #endif
 767
 768         img_addr = genimg_get_kernel_addr_fit(argc < 1 ? NULL : argv[0],
 769                                               &fit_uname_config,
 770                                               &fit_uname_kernel);
 771
 772         bootstage_mark(BOOTSTAGE_ID_CHECK_MAGIC);
 773
 774         /* copy from dataflash if needed */
 775         img_addr = genimg_get_image(img_addr);
 776
 777         /* check image type, for FIT images get FIT kernel node */
 778         *os_data = *os_len = 0;
 779         buf = map_sysmem(img_addr, 0);
 780         switch (genimg_get_format(buf)) {
 781 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
 782         case IMAGE_FORMAT_LEGACY:
 783                 printf("## Booting kernel from Legacy Image at %08lx ...\n",
 784                        img_addr);
 785                 hdr = image_get_kernel(img_addr, images->verify);
 786                 if (!hdr)
 787                         return NULL;
 788                 bootstage_mark(BOOTSTAGE_ID_CHECK_IMAGETYPE);
 789
 790                 /* get os_data and os_len */
 791                 switch (image_get_type(hdr)) {
 792                 case IH_TYPE_KERNEL:
 793                 case IH_TYPE_KERNEL_NOLOAD:
 794                         *os_data = image_get_data(hdr);
 795                         *os_len = image_get_data_size(hdr);
 796                         break;
 797                 case IH_TYPE_MULTI:
 798                         image_multi_getimg(hdr, 0, os_data, os_len);
 799                         break;
 800                 case IH_TYPE_STANDALONE:
 801                         *os_data = image_get_data(hdr);
 802                         *os_len = image_get_data_size(hdr);
 803                         break;
 804                 default:
 805                         printf("Wrong Image Type for %s command\n",
 806                                cmdtp->name);
 807                         bootstage_error(BOOTSTAGE_ID_CHECK_IMAGETYPE);
 808                         return NULL;
 809                 }
 810
 811                 /*
 812                  * copy image header to allow for image overwrites during
 813                  * kernel decompression.
 814                  */
 815                 memmove(&images->legacy_hdr_os_copy, hdr,
 816                         sizeof(image_header_t));
 817
 818                 /* save pointer to image header */
 819                 images->legacy_hdr_os = hdr;
 820
 821                 images->legacy_hdr_valid = 1;
 822                 bootstage_mark(BOOTSTAGE_ID_DECOMP_IMAGE);
 823                 break;
 824 #endif
 825 #if defined(CONFIG_FIT)
 826         case IMAGE_FORMAT_FIT:
 827                 os_noffset = fit_image_load(images, img_addr,
 828                                 &fit_uname_kernel, &fit_uname_config,
 829                                 IH_ARCH_DEFAULT, IH_TYPE_KERNEL,
 830                                 BOOTSTAGE_ID_FIT_KERNEL_START,
 831                                 FIT_LOAD_IGNORED, os_data, os_len);
 832                 if (os_noffset < 0)
 833                         return NULL;
 834
 835                 images->fit_hdr_os = map_sysmem(img_addr, 0);
 836                 images->fit_uname_os = fit_uname_kernel;
 837                 images->fit_uname_cfg = fit_uname_config;
 838                 images->fit_noffset_os = os_noffset;
 839                 break;
 840 #endif
 841 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 842         case IMAGE_FORMAT_ANDROID:
 843                 printf("## Booting Android Image at 0x%08lx ...\n", img_addr);
 844                 if (android_image_get_kernel(buf, images->verify,
 845                                              os_data, os_len))
 846                         return NULL;
 847                 break;
 848 #endif
 849         default:
 850                 printf("Wrong Image Format for %s command\n", cmdtp->name);
 851                 bootstage_error(BOOTSTAGE_ID_FIT_KERNEL_INFO);
 852                 return NULL;
 853         }
 854
 855         debug("   kernel data at 0x%08lx, len = 0x%08lx (%ld)\n",
 856               *os_data, *os_len, *os_len);
 857
 858         return buf;
 859 }
 860 #else /* USE_HOSTCC */
 861
 862 void memmove_wd(void *to, void *from, size_t len, ulong chunksz)
 863 {
 864         memmove(to, from, len);
 865 }
 866
 867 static int bootm_host_load_image(const void *fit, int req_image_type)
 868 {
 869         const char *fit_uname_config = NULL;
 870         ulong data, len;
 871         bootm_headers_t images;
 872         int noffset;
 873         ulong load_end;
 874         uint8_t image_type;
 875         uint8_t imape_comp;
 876         void *load_buf;
 877         int ret;
 878
 879         memset(&images, '\0', sizeof(images));
 880         images.verify = 1;
 881         noffset = fit_image_load(&images, (ulong)fit,
 882                 NULL, &fit_uname_config,
 883                 IH_ARCH_DEFAULT, req_image_type, -1,
 884                 FIT_LOAD_IGNORED, &data, &len);
 885         if (noffset < 0)
 886                 return noffset;
 887         if (fit_image_get_type(fit, noffset, &image_type)) {
 888                 puts("Can't get image type!\n");
 889                 return -EINVAL;
 890         }
 891
 892         if (fit_image_get_comp(fit, noffset, &imape_comp)) {
 893                 puts("Can't get image compression!\n");
 894                 return -EINVAL;
 895         }
 896
 897         /* Allow the image to expand by a factor of 4, should be safe */
 898         load_buf = malloc((1 << 20) + len * 4);
 899         ret = bootm_decomp_image(imape_comp, 0, data, image_type, load_buf,
 900                                  (void *)data, len, CONFIG_SYS_BOOTM_LEN,
 901                                  &load_end);
 902         free(load_buf);
 903
 904         if (ret && ret != BOOTM_ERR_UNIMPLEMENTED)
 905                 return ret;
 906
 907         return 0;
 908 }
 909
 910 int bootm_host_load_images(const void *fit, int cfg_noffset)
 911 {
 912         static uint8_t image_types[] = {
 913                 IH_TYPE_KERNEL,
 914                 IH_TYPE_FLATDT,
 915                 IH_TYPE_RAMDISK,
 916         };
 917         int err = 0;
 918         int i;
 919
 920         for (i = 0; i < ARRAY_SIZE(image_types); i++) {
 921                 int ret;
 922
 923                 ret = bootm_host_load_image(fit, image_types[i]);
 924                 if (!err && ret && ret != -ENOENT)
 925                         err = ret;
 926         }
 927
 928         /* Return the first error we found */
 929         return err;
 930 }
 931
 932 #endif /* ndef USE_HOSTCC */