lib_ppc/bootm.c

   1 /*
   2  * (C) Copyright 2008 Semihalf
   3  *
   4  * (C) Copyright 2000-2006
   5  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26
  27 #include <common.h>
  28 #include <watchdog.h>
  29 #include <command.h>
  30 #include <image.h>
  31 #include <malloc.h>
  32 #include <zlib.h>
  33 #include <bzlib.h>
  34 #include <environment.h>
  35 #include <asm/byteorder.h>
  36
  37 #if defined(CONFIG_OF_LIBFDT)
  38 #include <fdt.h>
  39 #include <libfdt.h>
  40 #include <fdt_support.h>
  41
  42 static void fdt_error (const char *msg);
  43 static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  44                 bootm_headers_t *images, char **of_flat_tree, ulong *of_size);
  45 static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
  46                 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  47                 char **of_flat_tree, ulong *of_size);
  48 #endif
  49
  50 #ifdef CFG_INIT_RAM_LOCK
  51 #include <asm/cache.h>
  52 #endif
  53
  54 DECLARE_GLOBAL_DATA_PTR;
  55
  56 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  57 extern ulong get_effective_memsize(void);
  58 static ulong get_sp (void);
  59 static void set_clocks_in_mhz (bd_t *kbd);
  60
  61 #ifndef CFG_LINUX_LOWMEM_MAX_SIZE
  62 #define CFG_LINUX_LOWMEM_MAX_SIZE       (768*1024*1024)
  63 #endif
  64
  65 void  __attribute__((noinline))
  66 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  67                 bootm_headers_t *images)
  68 {
  69         ulong   sp;
  70
  71         ulong   initrd_start, initrd_end;
  72         ulong   rd_data_start, rd_data_end, rd_len;
  73         ulong   size;
  74
  75         ulong   cmd_start, cmd_end, bootmap_base;
  76         bd_t    *kbd;
  77         ulong   ep = 0;
  78         void    (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
  79         int     ret;
  80         ulong   of_size = 0;
  81         struct lmb *lmb = images->lmb;
  82
  83 #if defined(CONFIG_OF_LIBFDT)
  84         char    *of_flat_tree = NULL;
  85 #endif
  86
  87         bootmap_base = getenv_bootm_low();
  88         size = getenv_bootm_size();
  89
  90 #ifdef DEBUG
  91         if (((u64)bootmap_base + size) > (CFG_SDRAM_BASE + (u64)gd->ram_size))
  92                 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
  93         if ((bootmap_base + size) > get_effective_memsize())
  94                 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
  95 #endif
  96
  97         size = min(size, get_effective_memsize());
  98         size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
  99
 100         if (size < getenv_bootm_size()) {
 101                 ulong base = bootmap_base + size;
 102                 printf("WARNING: adjusting available memory to %x\n", size);
 103                 lmb_reserve(lmb, base, getenv_bootm_size() - size);
 104         }
 105
 106         /*
 107          * Booting a (Linux) kernel image
 108          *
 109          * Allocate space for command line and board info - the
 110          * address should be as high as possible within the reach of
 111          * the kernel (see CFG_BOOTMAPSZ settings), but in unused
 112          * memory, which means far enough below the current stack
 113          * pointer.
 114          */
 115         sp = get_sp();
 116         debug ("## Current stack ends at 0x%08lx\n", sp);
 117
 118         /* adjust sp by 1K to be safe */
 119         sp -= 1024;
 120         lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
 121
 122 #if defined(CONFIG_OF_LIBFDT)
 123         /* find flattened device tree */
 124         ret = boot_get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
 125
 126         if (ret)
 127                 goto error;
 128 #endif
 129
 130         if (!of_size) {
 131                 /* allocate space and init command line */
 132                 ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
 133                 if (ret) {
 134                         puts("ERROR with allocation of cmdline\n");
 135                         goto error;
 136                 }
 137
 138                 /* allocate space for kernel copy of board info */
 139                 ret = boot_get_kbd (lmb, &kbd, bootmap_base);
 140                 if (ret) {
 141                         puts("ERROR with allocation of kernel bd\n");
 142                         goto error;
 143                 }
 144                 set_clocks_in_mhz(kbd);
 145         }
 146
 147         /* find kernel entry point */
 148         if (images->legacy_hdr_valid) {
 149                 ep = image_get_ep (images->legacy_hdr_os);
 150 #if defined(CONFIG_FIT)
 151         } else if (images->fit_uname_os) {
 152                 ret = fit_image_get_entry (images->fit_hdr_os,
 153                                 images->fit_noffset_os, &ep);
 154                 if (ret) {
 155                         puts ("Can't get entry point property!\n");
 156                         goto error;
 157                 }
 158 #endif
 159         } else {
 160                 puts ("Could not find kernel entry point!\n");
 161                 goto error;
 162         }
 163         kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
 164
 165         /* find ramdisk */
 166         ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_PPC,
 167                         &rd_data_start, &rd_data_end);
 168         if (ret)
 169                 goto error;
 170
 171         rd_len = rd_data_end - rd_data_start;
 172
 173 #if defined(CONFIG_OF_LIBFDT)
 174         ret = boot_relocate_fdt (lmb, bootmap_base,
 175                 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
 176
 177         /*
 178          * Add the chosen node if it doesn't exist, add the env and bd_t
 179          * if the user wants it (the logic is in the subroutines).
 180          */
 181         if (of_size) {
 182                 /* pass in dummy initrd info, we'll fix up later */
 183                 if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
 184                         fdt_error ("/chosen node create failed");
 185                         goto error;
 186                 }
 187 #ifdef CONFIG_OF_BOARD_SETUP
 188                 /* Call the board-specific fixup routine */
 189                 ft_board_setup(of_flat_tree, gd->bd);
 190 #endif
 191         }
 192 #endif  /* CONFIG_OF_LIBFDT */
 193
 194         ret = boot_ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
 195         if (ret)
 196                 goto error;
 197
 198 #if defined(CONFIG_OF_LIBFDT)
 199         /* fixup the initrd now that we know where it should be */
 200         if ((of_flat_tree) && (initrd_start && initrd_end)) {
 201                 uint64_t addr, size;
 202                 int  total = fdt_num_mem_rsv(of_flat_tree);
 203                 int  j;
 204
 205                 /* Look for the dummy entry and delete it */
 206                 for (j = 0; j < total; j++) {
 207                         fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
 208                         if (addr == rd_data_start) {
 209                                 fdt_del_mem_rsv(of_flat_tree, j);
 210                                 break;
 211                         }
 212                 }
 213
 214                 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
 215                                         initrd_end - initrd_start + 1);
 216                 if (ret < 0) {
 217                         printf("fdt_chosen: %s\n", fdt_strerror(ret));
 218                         goto error;
 219                 }
 220
 221                 do_fixup_by_path_u32(of_flat_tree, "/chosen",
 222                                         "linux,initrd-start", initrd_start, 0);
 223                 do_fixup_by_path_u32(of_flat_tree, "/chosen",
 224                                         "linux,initrd-end", initrd_end, 0);
 225         }
 226 #endif
 227         debug ("## Transferring control to Linux (at address %08lx) ...\n",
 228                 (ulong)kernel);
 229
 230         show_boot_progress (15);
 231
 232 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
 233         unlock_ram_in_cache();
 234 #endif
 235         if (!images->autostart)
 236                 return ;
 237
 238 #if defined(CONFIG_OF_LIBFDT)
 239         if (of_flat_tree) {     /* device tree; boot new style */
 240                 /*
 241                  * Linux Kernel Parameters (passing device tree):
 242                  *   r3: pointer to the fdt, followed by the board info data
 243                  *   r4: physical pointer to the kernel itself
 244                  *   r5: NULL
 245                  *   r6: NULL
 246                  *   r7: NULL
 247                  */
 248                 debug ("   Booting using OF flat tree...\n");
 249                 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
 250                 /* does not return */
 251         } else
 252 #endif
 253         {
 254                 /*
 255                  * Linux Kernel Parameters (passing board info data):
 256                  *   r3: ptr to board info data
 257                  *   r4: initrd_start or 0 if no initrd
 258                  *   r5: initrd_end - unused if r4 is 0
 259                  *   r6: Start of command line string
 260                  *   r7: End   of command line string
 261                  */
 262                 debug ("   Booting using board info...\n");
 263                 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
 264                 /* does not return */
 265         }
 266         return ;
 267
 268 error:
 269         if (images->autostart)
 270                 do_reset (cmdtp, flag, argc, argv);
 271         return ;
 272 }
 273
 274 static ulong get_sp (void)
 275 {
 276         ulong sp;
 277
 278         asm( "mr %0,1": "=r"(sp) : );
 279         return sp;
 280 }
 281
 282 static void set_clocks_in_mhz (bd_t *kbd)
 283 {
 284         char    *s;
 285
 286         if ((s = getenv ("clocks_in_mhz")) != NULL) {
 287                 /* convert all clock information to MHz */
 288                 kbd->bi_intfreq /= 1000000L;
 289                 kbd->bi_busfreq /= 1000000L;
 290 #if defined(CONFIG_MPC8220)
 291                 kbd->bi_inpfreq /= 1000000L;
 292                 kbd->bi_pcifreq /= 1000000L;
 293                 kbd->bi_pevfreq /= 1000000L;
 294                 kbd->bi_flbfreq /= 1000000L;
 295                 kbd->bi_vcofreq /= 1000000L;
 296 #endif
 297 #if defined(CONFIG_CPM2)
 298                 kbd->bi_cpmfreq /= 1000000L;
 299                 kbd->bi_brgfreq /= 1000000L;
 300                 kbd->bi_sccfreq /= 1000000L;
 301                 kbd->bi_vco     /= 1000000L;
 302 #endif
 303 #if defined(CONFIG_MPC5xxx)
 304                 kbd->bi_ipbfreq /= 1000000L;
 305                 kbd->bi_pcifreq /= 1000000L;
 306 #endif /* CONFIG_MPC5xxx */
 307         }
 308 }
 309
 310 #if defined(CONFIG_OF_LIBFDT)
 311 static void fdt_error (const char *msg)
 312 {
 313         puts ("ERROR: ");
 314         puts (msg);
 315         puts (" - must RESET the board to recover.\n");
 316 }
 317
 318 static image_header_t *image_get_fdt (ulong fdt_addr)
 319 {
 320         image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
 321
 322         image_print_contents (fdt_hdr);
 323
 324         puts ("   Verifying Checksum ... ");
 325         if (!image_check_hcrc (fdt_hdr)) {
 326                 fdt_error ("fdt header checksum invalid");
 327                 return NULL;
 328         }
 329
 330         if (!image_check_dcrc (fdt_hdr)) {
 331                 fdt_error ("fdt checksum invalid");
 332                 return NULL;
 333         }
 334         puts ("OK\n");
 335
 336         if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
 337                 fdt_error ("uImage is not a fdt");
 338                 return NULL;
 339         }
 340         if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
 341                 fdt_error ("uImage is compressed");
 342                 return NULL;
 343         }
 344         if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
 345                 fdt_error ("uImage data is not a fdt");
 346                 return NULL;
 347         }
 348         return fdt_hdr;
 349 }
 350
 351 /**
 352  * fit_check_fdt - verify FIT format FDT subimage
 353  * @fit_hdr: pointer to the FIT  header
 354  * fdt_noffset: FDT subimage node offset within FIT image
 355  * @verify: data CRC verification flag
 356  *
 357  * fit_check_fdt() verifies integrity of the FDT subimage and from
 358  * specified FIT image.
 359  *
 360  * returns:
 361  *     1, on success
 362  *     0, on failure
 363  */
 364 #if defined(CONFIG_FIT)
 365 static int fit_check_fdt (const void *fit, int fdt_noffset, int verify)
 366 {
 367         fit_image_print (fit, fdt_noffset, "   ");
 368
 369         if (verify) {
 370                 puts ("   Verifying Hash Integrity ... ");
 371                 if (!fit_image_check_hashes (fit, fdt_noffset)) {
 372                         fdt_error ("Bad Data Hash");
 373                         return 0;
 374                 }
 375                 puts ("OK\n");
 376         }
 377
 378         if (!fit_image_check_type (fit, fdt_noffset, IH_TYPE_FLATDT)) {
 379                 fdt_error ("Not a FDT image");
 380                 return 0;
 381         }
 382
 383         if (!fit_image_check_comp (fit, fdt_noffset, IH_COMP_NONE)) {
 384                 fdt_error ("FDT image is compressed");
 385                 return 0;
 386         }
 387
 388         return 1;
 389 }
 390 #endif /* CONFIG_FIT */
 391
 392 static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 393                 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
 394 {
 395         ulong           fdt_addr;
 396         image_header_t  *fdt_hdr;
 397         char            *fdt_blob = NULL;
 398         ulong           image_start, image_end;
 399         ulong           load_start, load_end;
 400 #if defined(CONFIG_FIT)
 401         void            *fit_hdr;
 402         const char      *fit_uname_config = NULL;
 403         const char      *fit_uname_fdt = NULL;
 404         ulong           default_addr;
 405         int             cfg_noffset;
 406         int             fdt_noffset;
 407         const void      *data;
 408         size_t          size;
 409 #endif
 410
 411         *of_flat_tree = NULL;
 412         *of_size = 0;
 413
 414         if (argc > 3 || genimg_has_config (images)) {
 415 #if defined(CONFIG_FIT)
 416                 if (argc > 3) {
 417                         /*
 418                          * If the FDT blob comes from the FIT image and the
 419                          * FIT image address is omitted in the command line
 420                          * argument, try to use ramdisk or os FIT image
 421                          * address or default load address.
 422                          */
 423                         if (images->fit_uname_rd)
 424                                 default_addr = (ulong)images->fit_hdr_rd;
 425                         else if (images->fit_uname_os)
 426                                 default_addr = (ulong)images->fit_hdr_os;
 427                         else
 428                                 default_addr = load_addr;
 429
 430                         if (fit_parse_conf (argv[3], default_addr,
 431                                                 &fdt_addr, &fit_uname_config)) {
 432                                 debug ("*  fdt: config '%s' from image at 0x%08lx\n",
 433                                                 fit_uname_config, fdt_addr);
 434                         } else if (fit_parse_subimage (argv[3], default_addr,
 435                                                 &fdt_addr, &fit_uname_fdt)) {
 436                                 debug ("*  fdt: subimage '%s' from image at 0x%08lx\n",
 437                                                 fit_uname_fdt, fdt_addr);
 438                         } else
 439 #endif
 440                         {
 441                                 fdt_addr = simple_strtoul(argv[3], NULL, 16);
 442                                 debug ("*  fdt: cmdline image address = 0x%08lx\n",
 443                                                 fdt_addr);
 444                         }
 445 #if defined(CONFIG_FIT)
 446                 } else {
 447                         /* use FIT configuration provided in first bootm
 448                          * command argument
 449                          */
 450                         fdt_addr = (ulong)images->fit_hdr_os;
 451                         fit_uname_config = images->fit_uname_cfg;
 452                         debug ("*  fdt: using config '%s' from image at 0x%08lx\n",
 453                                         fit_uname_config, fdt_addr);
 454
 455                         /*
 456                          * Check whether configuration has FDT blob defined,
 457                          * if not quit silently.
 458                          */
 459                         fit_hdr = (void *)fdt_addr;
 460                         cfg_noffset = fit_conf_get_node (fit_hdr,
 461                                         fit_uname_config);
 462                         if (cfg_noffset < 0) {
 463                                 debug ("*  fdt: no such config\n");
 464                                 return 0;
 465                         }
 466
 467                         fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
 468                                         cfg_noffset);
 469                         if (fdt_noffset < 0) {
 470                                 debug ("*  fdt: no fdt in config\n");
 471                                 return 0;
 472                         }
 473                 }
 474 #endif
 475
 476                 debug ("## Checking for 'FDT'/'FDT Image' at %08lx\n",
 477                                 fdt_addr);
 478
 479                 /* copy from dataflash if needed */
 480                 fdt_addr = genimg_get_image (fdt_addr);
 481
 482                 /*
 483                  * Check if there is an FDT image at the
 484                  * address provided in the second bootm argument
 485                  * check image type, for FIT images get a FIT node.
 486                  */
 487                 switch (genimg_get_format ((void *)fdt_addr)) {
 488                 case IMAGE_FORMAT_LEGACY:
 489                         /* verify fdt_addr points to a valid image header */
 490                         printf ("## Flattened Device Tree from Legacy Image at %08lx\n",
 491                                         fdt_addr);
 492                         fdt_hdr = image_get_fdt (fdt_addr);
 493                         if (!fdt_hdr)
 494                                 goto error;
 495
 496                         /*
 497                          * move image data to the load address,
 498                          * make sure we don't overwrite initial image
 499                          */
 500                         image_start = (ulong)fdt_hdr;
 501                         image_end = image_get_image_end (fdt_hdr);
 502
 503                         load_start = image_get_load (fdt_hdr);
 504                         load_end = load_start + image_get_data_size (fdt_hdr);
 505
 506                         if ((load_start < image_end) && (load_end > image_start)) {
 507                                 fdt_error ("fdt overwritten");
 508                                 goto error;
 509                         }
 510
 511                         debug ("   Loading FDT from 0x%08lx to 0x%08lx\n",
 512                                         image_get_data (fdt_hdr), load_start);
 513
 514                         memmove ((void *)load_start,
 515                                         (void *)image_get_data (fdt_hdr),
 516                                         image_get_data_size (fdt_hdr));
 517
 518                         fdt_blob = (char *)load_start;
 519                         break;
 520                 case IMAGE_FORMAT_FIT:
 521                         /*
 522                          * This case will catch both: new uImage format
 523                          * (libfdt based) and raw FDT blob (also libfdt
 524                          * based).
 525                          */
 526 #if defined(CONFIG_FIT)
 527                         /* check FDT blob vs FIT blob */
 528                         if (fit_check_format ((const void *)fdt_addr)) {
 529                                 /*
 530                                  * FIT image
 531                                  */
 532                                 fit_hdr = (void *)fdt_addr;
 533                                 printf ("## Flattened Device Tree from FIT Image at %08lx\n",
 534                                                 fdt_addr);
 535
 536                                 if (!fit_uname_fdt) {
 537                                         /*
 538                                          * no FDT blob image node unit name,
 539                                          * try to get config node first. If
 540                                          * config unit node name is NULL
 541                                          * fit_conf_get_node() will try to
 542                                          * find default config node
 543                                          */
 544                                         cfg_noffset = fit_conf_get_node (fit_hdr,
 545                                                         fit_uname_config);
 546
 547                                         if (cfg_noffset < 0) {
 548                                                 fdt_error ("Could not find configuration node\n");
 549                                                 goto error;
 550                                         }
 551
 552                                         fit_uname_config = fdt_get_name (fit_hdr,
 553                                                         cfg_noffset, NULL);
 554                                         printf ("   Using '%s' configuration\n",
 555                                                         fit_uname_config);
 556
 557                                         fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
 558                                                         cfg_noffset);
 559                                         fit_uname_fdt = fit_get_name (fit_hdr,
 560                                                         fdt_noffset, NULL);
 561                                 } else {
 562                                         /* get FDT component image node offset */
 563                                         fdt_noffset = fit_image_get_node (fit_hdr,
 564                                                         fit_uname_fdt);
 565                                 }
 566                                 if (fdt_noffset < 0) {
 567                                         fdt_error ("Could not find subimage node\n");
 568                                         goto error;
 569                                 }
 570
 571                                 printf ("   Trying '%s' FDT blob subimage\n",
 572                                                 fit_uname_fdt);
 573
 574                                 if (!fit_check_fdt (fit_hdr, fdt_noffset,
 575                                                         images->verify))
 576                                         goto error;
 577
 578                                 /* get ramdisk image data address and length */
 579                                 if (fit_image_get_data (fit_hdr, fdt_noffset,
 580                                                         &data, &size)) {
 581                                         fdt_error ("Could not find FDT subimage data");
 582                                         goto error;
 583                                 }
 584
 585                                 /* verift that image data is a proper FDT blob */
 586                                 if (fdt_check_header ((char *)data) != 0) {
 587                                         fdt_error ("Subimage data is not a FTD");
 588                                         goto error;
 589                                 }
 590
 591                                 /*
 592                                  * move image data to the load address,
 593                                  * make sure we don't overwrite initial image
 594                                  */
 595                                 image_start = (ulong)fit_hdr;
 596                                 image_end = fit_get_end (fit_hdr);
 597
 598                                 if (fit_image_get_load (fit_hdr, fdt_noffset,
 599                                                         &load_start) == 0) {
 600                                         load_end = load_start + size;
 601
 602                                         if ((load_start < image_end) &&
 603                                                         (load_end > image_start)) {
 604                                                 fdt_error ("FDT overwritten");
 605                                                 goto error;
 606                                         }
 607
 608                                         printf ("   Loading FDT from 0x%08lx to 0x%08lx\n",
 609                                                         (ulong)data, load_start);
 610
 611                                         memmove ((void *)load_start,
 612                                                         (void *)data, size);
 613
 614                                         fdt_blob = (char *)load_start;
 615                                 } else {
 616                                         fdt_blob = (char *)data;
 617                                 }
 618
 619                                 images->fit_hdr_fdt = fit_hdr;
 620                                 images->fit_uname_fdt = fit_uname_fdt;
 621                                 images->fit_noffset_fdt = fdt_noffset;
 622                                 break;
 623                         } else
 624 #endif
 625                         {
 626                                 /*
 627                                  * FDT blob
 628                                  */
 629                                 debug ("*  fdt: raw FDT blob\n");
 630                                 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
 631                                 fdt_blob = (char *)fdt_addr;
 632                         }
 633                         break;
 634                 default:
 635                         fdt_error ("Did not find a cmdline Flattened Device Tree");
 636                         goto error;
 637                 }
 638
 639                 printf ("   Booting using the fdt blob at 0x%x\n", fdt_blob);
 640
 641         } else if (images->legacy_hdr_valid &&
 642                         image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
 643
 644                 ulong fdt_data, fdt_len;
 645
 646                 /*
 647                  * Now check if we have a legacy multi-component image,
 648                  * get second entry data start address and len.
 649                  */
 650                 printf ("## Flattened Device Tree from multi "
 651                         "component Image at %08lX\n",
 652                         (ulong)images->legacy_hdr_os);
 653
 654                 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
 655                 if (fdt_len) {
 656
 657                         fdt_blob = (char *)fdt_data;
 658                         printf ("   Booting using the fdt at 0x%x\n", fdt_blob);
 659
 660                         if (fdt_check_header (fdt_blob) != 0) {
 661                                 fdt_error ("image is not a fdt");
 662                                 goto error;
 663                         }
 664
 665                         if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
 666                                 fdt_error ("fdt size != image size");
 667                                 goto error;
 668                         }
 669                 } else {
 670                         fdt_error ("Did not find a Flattened Device Tree "
 671                                 "in a legacy multi-component image");
 672                         goto error;
 673                 }
 674         } else {
 675                 debug ("## No Flattened Device Tree\n");
 676                 return 0;
 677         }
 678
 679         *of_flat_tree = fdt_blob;
 680         *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
 681         debug ("   of_flat_tree at 0x%08lx size 0x%08lx\n",
 682                         *of_flat_tree, *of_size);
 683
 684         return 0;
 685
 686 error:
 687         do_reset (cmdtp, flag, argc, argv);
 688         return 1;
 689 }
 690
 691 static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
 692                 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 693                 char **of_flat_tree, ulong *of_size)
 694 {
 695         char    *fdt_blob = *of_flat_tree;
 696         ulong   relocate = 0;
 697         ulong   of_len = 0;
 698
 699         /* nothing to do */
 700         if (*of_size == 0)
 701                 return 0;
 702
 703         if (fdt_check_header (fdt_blob) != 0) {
 704                 fdt_error ("image is not a fdt");
 705                 goto error;
 706         }
 707
 708 #ifndef CFG_NO_FLASH
 709         /* move the blob if it is in flash (set relocate) */
 710         if (addr2info ((ulong)fdt_blob) != NULL)
 711                 relocate = 1;
 712 #endif
 713
 714         /*
 715          * The blob must be within CFG_BOOTMAPSZ,
 716          * so we flag it to be copied if it is not.
 717          */
 718         if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
 719                 relocate = 1;
 720
 721         of_len = be32_to_cpu (fdt_totalsize (fdt_blob));
 722
 723         /* move flattend device tree if needed */
 724         if (relocate) {
 725                 int err;
 726                 ulong of_start;
 727
 728                 /* position on a 4K boundary before the alloc_current */
 729                 of_start = lmb_alloc_base(lmb, of_len, 0x1000,
 730                                          (CFG_BOOTMAPSZ + bootmap_base));
 731
 732                 if (of_start == 0) {
 733                         puts("device tree - allocation error\n");
 734                         goto error;
 735                 }
 736
 737                 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
 738                         (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
 739                         of_len, of_len);
 740
 741                 printf ("   Loading Device Tree to %08lx, end %08lx ... ",
 742                         of_start, of_start + of_len - 1);
 743
 744                 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
 745                 if (err != 0) {
 746                         fdt_error ("fdt move failed");
 747                         goto error;
 748                 }
 749                 puts ("OK\n");
 750
 751                 *of_flat_tree = (char *)of_start;
 752         } else {
 753                 *of_flat_tree = fdt_blob;
 754                 lmb_reserve(lmb, (ulong)fdt, of_len);
 755         }
 756
 757         return 0;
 758
 759 error:
 760         return 1;
 761 }
 762 #endif