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