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 #ifndef CFG_FDT_PAD
  55 #define CFG_FDT_PAD 0x3000
  56 #endif
  57
  58 DECLARE_GLOBAL_DATA_PTR;
  59
  60 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  61 extern ulong get_effective_memsize(void);
  62 static ulong get_sp (void);
  63 static void set_clocks_in_mhz (bd_t *kbd);
  64
  65 #ifndef CFG_LINUX_LOWMEM_MAX_SIZE
  66 #define CFG_LINUX_LOWMEM_MAX_SIZE       (768*1024*1024)
  67 #endif
  68
  69 void  __attribute__((noinline))
  70 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  71                 bootm_headers_t *images)
  72 {
  73         ulong   sp;
  74
  75         ulong   initrd_start, initrd_end;
  76         ulong   rd_len;
  77         ulong   size;
  78         phys_size_t bootm_size;
  79
  80         ulong   cmd_start, cmd_end, bootmap_base;
  81         bd_t    *kbd;
  82         void    (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
  83                           ulong r7, ulong r8, ulong r9);
  84         int     ret;
  85         ulong   of_size = 0;
  86         struct lmb *lmb = images->lmb;
  87
  88 #if defined(CONFIG_OF_LIBFDT)
  89         char    *of_flat_tree = NULL;
  90 #endif
  91
  92         kernel = (void (*)(bd_t *, ulong, ulong, ulong,
  93                            ulong, ulong, ulong))images->ep;
  94
  95         bootmap_base = getenv_bootm_low();
  96         bootm_size = getenv_bootm_size();
  97
  98 #ifdef DEBUG
  99         if (((u64)bootmap_base + bootm_size) >
 100             (CFG_SDRAM_BASE + (u64)gd->ram_size))
 101                 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
 102         if ((bootmap_base + bootm_size) > get_effective_memsize())
 103                 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
 104 #endif
 105
 106         size = min(bootm_size, get_effective_memsize());
 107         size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
 108
 109         if (size < bootm_size) {
 110                 ulong base = bootmap_base + size;
 111                 printf("WARNING: adjusting available memory to %lx\n", size);
 112                 lmb_reserve(lmb, base, bootm_size - size);
 113         }
 114
 115         /*
 116          * Booting a (Linux) kernel image
 117          *
 118          * Allocate space for command line and board info - the
 119          * address should be as high as possible within the reach of
 120          * the kernel (see CFG_BOOTMAPSZ settings), but in unused
 121          * memory, which means far enough below the current stack
 122          * pointer.
 123          */
 124         sp = get_sp();
 125         debug ("## Current stack ends at 0x%08lx\n", sp);
 126
 127         /* adjust sp by 1K to be safe */
 128         sp -= 1024;
 129         lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
 130
 131 #if defined(CONFIG_OF_LIBFDT)
 132         /* find flattened device tree */
 133         ret = boot_get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
 134
 135         if (ret)
 136                 goto error;
 137 #endif
 138
 139         if (!of_size) {
 140                 /* allocate space and init command line */
 141                 ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
 142                 if (ret) {
 143                         puts("ERROR with allocation of cmdline\n");
 144                         goto error;
 145                 }
 146
 147                 /* allocate space for kernel copy of board info */
 148                 ret = boot_get_kbd (lmb, &kbd, bootmap_base);
 149                 if (ret) {
 150                         puts("ERROR with allocation of kernel bd\n");
 151                         goto error;
 152                 }
 153                 set_clocks_in_mhz(kbd);
 154         }
 155
 156         rd_len = images->rd_end - images->rd_start;
 157
 158 #if defined(CONFIG_OF_LIBFDT)
 159         ret = boot_relocate_fdt (lmb, bootmap_base,
 160                 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
 161
 162         /*
 163          * Add the chosen node if it doesn't exist, add the env and bd_t
 164          * if the user wants it (the logic is in the subroutines).
 165          */
 166         if (of_size) {
 167                 /* pass in dummy initrd info, we'll fix up later */
 168                 if (fdt_chosen(of_flat_tree, images->rd_start, images->rd_end, 0) < 0) {
 169                         fdt_error ("/chosen node create failed");
 170                         goto error;
 171                 }
 172 #ifdef CONFIG_OF_BOARD_SETUP
 173                 /* Call the board-specific fixup routine */
 174                 ft_board_setup(of_flat_tree, gd->bd);
 175 #endif
 176         }
 177
 178         /* Fixup the fdt memreserve now that we know how big it is */
 179         if (of_flat_tree) {
 180                 int j;
 181                 uint64_t addr, size;
 182                 int total = fdt_num_mem_rsv(of_flat_tree);
 183                 uint actualsize;
 184
 185                 for (j = 0; j < total; j++) {
 186                         fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
 187                         if (addr == (uint64_t)(u32)of_flat_tree) {
 188                                 fdt_del_mem_rsv(of_flat_tree, j);
 189                                 break;
 190                         }
 191                 }
 192
 193                 /* Delete the old LMB reservation */
 194                 lmb_free(lmb, (phys_addr_t)(u32)of_flat_tree,
 195                                 (phys_size_t)fdt_totalsize(of_flat_tree));
 196
 197                 /* Calculate the actual size of the fdt */
 198                 actualsize = fdt_off_dt_strings(of_flat_tree) +
 199                         fdt_size_dt_strings(of_flat_tree);
 200
 201                 /* Make it so the fdt ends on a page boundary */
 202                 actualsize = ALIGN(actualsize, 0x1000);
 203                 actualsize = actualsize - ((uint)of_flat_tree & 0xfff);
 204
 205                 /* Change the fdt header to reflect the correct size */
 206                 fdt_set_totalsize(of_flat_tree, actualsize);
 207                 of_size = actualsize;
 208
 209                 /* Add the new reservation */
 210                 ret = fdt_add_mem_rsv(of_flat_tree, (uint)of_flat_tree,
 211                                 of_size);
 212
 213                 /* Create a new LMB reservation */
 214                 lmb_reserve(lmb, (ulong)of_flat_tree, of_size);
 215         }
 216 #endif  /* CONFIG_OF_LIBFDT */
 217
 218         ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, &initrd_start, &initrd_end);
 219         if (ret)
 220                 goto error;
 221
 222 #if defined(CONFIG_OF_LIBFDT)
 223         /* fixup the initrd now that we know where it should be */
 224         if ((of_flat_tree) && (initrd_start && initrd_end)) {
 225                 uint64_t addr, size;
 226                 int  total = fdt_num_mem_rsv(of_flat_tree);
 227                 int  j;
 228
 229                 /* Look for the dummy entry and delete it */
 230                 for (j = 0; j < total; j++) {
 231                         fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
 232                         if (addr == images->rd_start) {
 233                                 fdt_del_mem_rsv(of_flat_tree, j);
 234                                 break;
 235                         }
 236                 }
 237
 238                 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
 239                                         initrd_end - initrd_start + 1);
 240                 if (ret < 0) {
 241                         printf("fdt_chosen: %s\n", fdt_strerror(ret));
 242                         goto error;
 243                 }
 244
 245                 do_fixup_by_path_u32(of_flat_tree, "/chosen",
 246                                         "linux,initrd-start", initrd_start, 0);
 247                 do_fixup_by_path_u32(of_flat_tree, "/chosen",
 248                                         "linux,initrd-end", initrd_end, 0);
 249         }
 250 #endif
 251         debug ("## Transferring control to Linux (at address %08lx) ...\n",
 252                 (ulong)kernel);
 253
 254         show_boot_progress (15);
 255
 256 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
 257         unlock_ram_in_cache();
 258 #endif
 259
 260 #if defined(CONFIG_OF_LIBFDT)
 261         if (of_flat_tree) {     /* device tree; boot new style */
 262                 /*
 263                  * Linux Kernel Parameters (passing device tree):
 264                  *   r3: pointer to the fdt
 265                  *   r4: 0
 266                  *   r5: 0
 267                  *   r6: epapr magic
 268                  *   r7: size of IMA in bytes
 269                  *   r8: 0
 270                  *   r9: 0
 271                  */
 272 #if defined(CONFIG_85xx) || defined(CONFIG_440)
 273  #define EPAPR_MAGIC    (0x45504150)
 274 #else
 275  #define EPAPR_MAGIC    (0x65504150)
 276 #endif
 277
 278                 debug ("   Booting using OF flat tree...\n");
 279                 (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
 280                            CFG_BOOTMAPSZ, 0, 0);
 281                 /* does not return */
 282         } else
 283 #endif
 284         {
 285                 /*
 286                  * Linux Kernel Parameters (passing board info data):
 287                  *   r3: ptr to board info data
 288                  *   r4: initrd_start or 0 if no initrd
 289                  *   r5: initrd_end - unused if r4 is 0
 290                  *   r6: Start of command line string
 291                  *   r7: End   of command line string
 292                  *   r8: 0
 293                  *   r9: 0
 294                  */
 295                 debug ("   Booting using board info...\n");
 296                 (*kernel) (kbd, initrd_start, initrd_end,
 297                            cmd_start, cmd_end, 0, 0);
 298                 /* does not return */
 299         }
 300         return ;
 301
 302 error:
 303         do_reset (cmdtp, flag, argc, argv);
 304         return ;
 305 }
 306
 307 static ulong get_sp (void)
 308 {
 309         ulong sp;
 310
 311         asm( "mr %0,1": "=r"(sp) : );
 312         return sp;
 313 }
 314
 315 static void set_clocks_in_mhz (bd_t *kbd)
 316 {
 317         char    *s;
 318
 319         if ((s = getenv ("clocks_in_mhz")) != NULL) {
 320                 /* convert all clock information to MHz */
 321                 kbd->bi_intfreq /= 1000000L;
 322                 kbd->bi_busfreq /= 1000000L;
 323 #if defined(CONFIG_MPC8220)
 324                 kbd->bi_inpfreq /= 1000000L;
 325                 kbd->bi_pcifreq /= 1000000L;
 326                 kbd->bi_pevfreq /= 1000000L;
 327                 kbd->bi_flbfreq /= 1000000L;
 328                 kbd->bi_vcofreq /= 1000000L;
 329 #endif
 330 #if defined(CONFIG_CPM2)
 331                 kbd->bi_cpmfreq /= 1000000L;
 332                 kbd->bi_brgfreq /= 1000000L;
 333                 kbd->bi_sccfreq /= 1000000L;
 334                 kbd->bi_vco     /= 1000000L;
 335 #endif
 336 #if defined(CONFIG_MPC5xxx)
 337                 kbd->bi_ipbfreq /= 1000000L;
 338                 kbd->bi_pcifreq /= 1000000L;
 339 #endif /* CONFIG_MPC5xxx */
 340         }
 341 }
 342
 343 #if defined(CONFIG_OF_LIBFDT)
 344 static void fdt_error (const char *msg)
 345 {
 346         puts ("ERROR: ");
 347         puts (msg);
 348         puts (" - must RESET the board to recover.\n");
 349 }
 350
 351 static image_header_t *image_get_fdt (ulong fdt_addr)
 352 {
 353         image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
 354
 355         image_print_contents (fdt_hdr);
 356
 357         puts ("   Verifying Checksum ... ");
 358         if (!image_check_hcrc (fdt_hdr)) {
 359                 fdt_error ("fdt header checksum invalid");
 360                 return NULL;
 361         }
 362
 363         if (!image_check_dcrc (fdt_hdr)) {
 364                 fdt_error ("fdt checksum invalid");
 365                 return NULL;
 366         }
 367         puts ("OK\n");
 368
 369         if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
 370                 fdt_error ("uImage is not a fdt");
 371                 return NULL;
 372         }
 373         if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
 374                 fdt_error ("uImage is compressed");
 375                 return NULL;
 376         }
 377         if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
 378                 fdt_error ("uImage data is not a fdt");
 379                 return NULL;
 380         }
 381         return fdt_hdr;
 382 }
 383
 384 /**
 385  * fit_check_fdt - verify FIT format FDT subimage
 386  * @fit_hdr: pointer to the FIT  header
 387  * fdt_noffset: FDT subimage node offset within FIT image
 388  * @verify: data CRC verification flag
 389  *
 390  * fit_check_fdt() verifies integrity of the FDT subimage and from
 391  * specified FIT image.
 392  *
 393  * returns:
 394  *     1, on success
 395  *     0, on failure
 396  */
 397 #if defined(CONFIG_FIT)
 398 static int fit_check_fdt (const void *fit, int fdt_noffset, int verify)
 399 {
 400         fit_image_print (fit, fdt_noffset, "   ");
 401
 402         if (verify) {
 403                 puts ("   Verifying Hash Integrity ... ");
 404                 if (!fit_image_check_hashes (fit, fdt_noffset)) {
 405                         fdt_error ("Bad Data Hash");
 406                         return 0;
 407                 }
 408                 puts ("OK\n");
 409         }
 410
 411         if (!fit_image_check_type (fit, fdt_noffset, IH_TYPE_FLATDT)) {
 412                 fdt_error ("Not a FDT image");
 413                 return 0;
 414         }
 415
 416         if (!fit_image_check_comp (fit, fdt_noffset, IH_COMP_NONE)) {
 417                 fdt_error ("FDT image is compressed");
 418                 return 0;
 419         }
 420
 421         return 1;
 422 }
 423 #endif /* CONFIG_FIT */
 424
 425 static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 426                 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
 427 {
 428         ulong           fdt_addr;
 429         image_header_t  *fdt_hdr;
 430         char            *fdt_blob = NULL;
 431         ulong           image_start, image_end;
 432         ulong           load_start, load_end;
 433 #if defined(CONFIG_FIT)
 434         void            *fit_hdr;
 435         const char      *fit_uname_config = NULL;
 436         const char      *fit_uname_fdt = NULL;
 437         ulong           default_addr;
 438         int             cfg_noffset;
 439         int             fdt_noffset;
 440         const void      *data;
 441         size_t          size;
 442 #endif
 443
 444         *of_flat_tree = NULL;
 445         *of_size = 0;
 446
 447         if (argc > 3 || genimg_has_config (images)) {
 448 #if defined(CONFIG_FIT)
 449                 if (argc > 3) {
 450                         /*
 451                          * If the FDT blob comes from the FIT image and the
 452                          * FIT image address is omitted in the command line
 453                          * argument, try to use ramdisk or os FIT image
 454                          * address or default load address.
 455                          */
 456                         if (images->fit_uname_rd)
 457                                 default_addr = (ulong)images->fit_hdr_rd;
 458                         else if (images->fit_uname_os)
 459                                 default_addr = (ulong)images->fit_hdr_os;
 460                         else
 461                                 default_addr = load_addr;
 462
 463                         if (fit_parse_conf (argv[3], default_addr,
 464                                                 &fdt_addr, &fit_uname_config)) {
 465                                 debug ("*  fdt: config '%s' from image at 0x%08lx\n",
 466                                                 fit_uname_config, fdt_addr);
 467                         } else if (fit_parse_subimage (argv[3], default_addr,
 468                                                 &fdt_addr, &fit_uname_fdt)) {
 469                                 debug ("*  fdt: subimage '%s' from image at 0x%08lx\n",
 470                                                 fit_uname_fdt, fdt_addr);
 471                         } else
 472 #endif
 473                         {
 474                                 fdt_addr = simple_strtoul(argv[3], NULL, 16);
 475                                 debug ("*  fdt: cmdline image address = 0x%08lx\n",
 476                                                 fdt_addr);
 477                         }
 478 #if defined(CONFIG_FIT)
 479                 } else {
 480                         /* use FIT configuration provided in first bootm
 481                          * command argument
 482                          */
 483                         fdt_addr = (ulong)images->fit_hdr_os;
 484                         fit_uname_config = images->fit_uname_cfg;
 485                         debug ("*  fdt: using config '%s' from image at 0x%08lx\n",
 486                                         fit_uname_config, fdt_addr);
 487
 488                         /*
 489                          * Check whether configuration has FDT blob defined,
 490                          * if not quit silently.
 491                          */
 492                         fit_hdr = (void *)fdt_addr;
 493                         cfg_noffset = fit_conf_get_node (fit_hdr,
 494                                         fit_uname_config);
 495                         if (cfg_noffset < 0) {
 496                                 debug ("*  fdt: no such config\n");
 497                                 return 0;
 498                         }
 499
 500                         fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
 501                                         cfg_noffset);
 502                         if (fdt_noffset < 0) {
 503                                 debug ("*  fdt: no fdt in config\n");
 504                                 return 0;
 505                         }
 506                 }
 507 #endif
 508
 509                 debug ("## Checking for 'FDT'/'FDT Image' at %08lx\n",
 510                                 fdt_addr);
 511
 512                 /* copy from dataflash if needed */
 513                 fdt_addr = genimg_get_image (fdt_addr);
 514
 515                 /*
 516                  * Check if there is an FDT image at the
 517                  * address provided in the second bootm argument
 518                  * check image type, for FIT images get a FIT node.
 519                  */
 520                 switch (genimg_get_format ((void *)fdt_addr)) {
 521                 case IMAGE_FORMAT_LEGACY:
 522                         /* verify fdt_addr points to a valid image header */
 523                         printf ("## Flattened Device Tree from Legacy Image at %08lx\n",
 524                                         fdt_addr);
 525                         fdt_hdr = image_get_fdt (fdt_addr);
 526                         if (!fdt_hdr)
 527                                 goto error;
 528
 529                         /*
 530                          * move image data to the load address,
 531                          * make sure we don't overwrite initial image
 532                          */
 533                         image_start = (ulong)fdt_hdr;
 534                         image_end = image_get_image_end (fdt_hdr);
 535
 536                         load_start = image_get_load (fdt_hdr);
 537                         load_end = load_start + image_get_data_size (fdt_hdr);
 538
 539                         if ((load_start < image_end) && (load_end > image_start)) {
 540                                 fdt_error ("fdt overwritten");
 541                                 goto error;
 542                         }
 543
 544                         debug ("   Loading FDT from 0x%08lx to 0x%08lx\n",
 545                                         image_get_data (fdt_hdr), load_start);
 546
 547                         memmove ((void *)load_start,
 548                                         (void *)image_get_data (fdt_hdr),
 549                                         image_get_data_size (fdt_hdr));
 550
 551                         fdt_blob = (char *)load_start;
 552                         break;
 553                 case IMAGE_FORMAT_FIT:
 554                         /*
 555                          * This case will catch both: new uImage format
 556                          * (libfdt based) and raw FDT blob (also libfdt
 557                          * based).
 558                          */
 559 #if defined(CONFIG_FIT)
 560                         /* check FDT blob vs FIT blob */
 561                         if (fit_check_format ((const void *)fdt_addr)) {
 562                                 /*
 563                                  * FIT image
 564                                  */
 565                                 fit_hdr = (void *)fdt_addr;
 566                                 printf ("## Flattened Device Tree from FIT Image at %08lx\n",
 567                                                 fdt_addr);
 568
 569                                 if (!fit_uname_fdt) {
 570                                         /*
 571                                          * no FDT blob image node unit name,
 572                                          * try to get config node first. If
 573                                          * config unit node name is NULL
 574                                          * fit_conf_get_node() will try to
 575                                          * find default config node
 576                                          */
 577                                         cfg_noffset = fit_conf_get_node (fit_hdr,
 578                                                         fit_uname_config);
 579
 580                                         if (cfg_noffset < 0) {
 581                                                 fdt_error ("Could not find configuration node\n");
 582                                                 goto error;
 583                                         }
 584
 585                                         fit_uname_config = fdt_get_name (fit_hdr,
 586                                                         cfg_noffset, NULL);
 587                                         printf ("   Using '%s' configuration\n",
 588                                                         fit_uname_config);
 589
 590                                         fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
 591                                                         cfg_noffset);
 592                                         fit_uname_fdt = fit_get_name (fit_hdr,
 593                                                         fdt_noffset, NULL);
 594                                 } else {
 595                                         /* get FDT component image node offset */
 596                                         fdt_noffset = fit_image_get_node (fit_hdr,
 597                                                         fit_uname_fdt);
 598                                 }
 599                                 if (fdt_noffset < 0) {
 600                                         fdt_error ("Could not find subimage node\n");
 601                                         goto error;
 602                                 }
 603
 604                                 printf ("   Trying '%s' FDT blob subimage\n",
 605                                                 fit_uname_fdt);
 606
 607                                 if (!fit_check_fdt (fit_hdr, fdt_noffset,
 608                                                         images->verify))
 609                                         goto error;
 610
 611                                 /* get ramdisk image data address and length */
 612                                 if (fit_image_get_data (fit_hdr, fdt_noffset,
 613                                                         &data, &size)) {
 614                                         fdt_error ("Could not find FDT subimage data");
 615                                         goto error;
 616                                 }
 617
 618                                 /* verift that image data is a proper FDT blob */
 619                                 if (fdt_check_header ((char *)data) != 0) {
 620                                         fdt_error ("Subimage data is not a FTD");
 621                                         goto error;
 622                                 }
 623
 624                                 /*
 625                                  * move image data to the load address,
 626                                  * make sure we don't overwrite initial image
 627                                  */
 628                                 image_start = (ulong)fit_hdr;
 629                                 image_end = fit_get_end (fit_hdr);
 630
 631                                 if (fit_image_get_load (fit_hdr, fdt_noffset,
 632                                                         &load_start) == 0) {
 633                                         load_end = load_start + size;
 634
 635                                         if ((load_start < image_end) &&
 636                                                         (load_end > image_start)) {
 637                                                 fdt_error ("FDT overwritten");
 638                                                 goto error;
 639                                         }
 640
 641                                         printf ("   Loading FDT from 0x%08lx to 0x%08lx\n",
 642                                                         (ulong)data, load_start);
 643
 644                                         memmove ((void *)load_start,
 645                                                         (void *)data, size);
 646
 647                                         fdt_blob = (char *)load_start;
 648                                 } else {
 649                                         fdt_blob = (char *)data;
 650                                 }
 651
 652                                 images->fit_hdr_fdt = fit_hdr;
 653                                 images->fit_uname_fdt = fit_uname_fdt;
 654                                 images->fit_noffset_fdt = fdt_noffset;
 655                                 break;
 656                         } else
 657 #endif
 658                         {
 659                                 /*
 660                                  * FDT blob
 661                                  */
 662                                 fdt_blob = (char *)fdt_addr;
 663                                 debug ("*  fdt: raw FDT blob\n");
 664                                 printf ("## Flattened Device Tree blob at %08lx\n", (long)fdt_blob);
 665                         }
 666                         break;
 667                 default:
 668                         fdt_error ("Did not find a cmdline Flattened Device Tree");
 669                         goto error;
 670                 }
 671
 672                 printf ("   Booting using the fdt blob at 0x%x\n", (int)fdt_blob);
 673
 674         } else if (images->legacy_hdr_valid &&
 675                         image_check_type (&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) {
 676
 677                 ulong fdt_data, fdt_len;
 678
 679                 /*
 680                  * Now check if we have a legacy multi-component image,
 681                  * get second entry data start address and len.
 682                  */
 683                 printf ("## Flattened Device Tree from multi "
 684                         "component Image at %08lX\n",
 685                         (ulong)images->legacy_hdr_os);
 686
 687                 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
 688                 if (fdt_len) {
 689
 690                         fdt_blob = (char *)fdt_data;
 691                         printf ("   Booting using the fdt at 0x%x\n", (int)fdt_blob);
 692
 693                         if (fdt_check_header (fdt_blob) != 0) {
 694                                 fdt_error ("image is not a fdt");
 695                                 goto error;
 696                         }
 697
 698                         if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
 699                                 fdt_error ("fdt size != image size");
 700                                 goto error;
 701                         }
 702                 } else {
 703                         debug ("## No Flattened Device Tree\n");
 704                         return 0;
 705                 }
 706         } else {
 707                 debug ("## No Flattened Device Tree\n");
 708                 return 0;
 709         }
 710
 711         *of_flat_tree = fdt_blob;
 712         *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
 713         debug ("   of_flat_tree at 0x%08lx size 0x%08lx\n",
 714                         *of_flat_tree, *of_size);
 715
 716         return 0;
 717
 718 error:
 719         do_reset (cmdtp, flag, argc, argv);
 720         return 1;
 721 }
 722
 723 static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
 724                 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 725                 char **of_flat_tree, ulong *of_size)
 726 {
 727         char    *fdt_blob = *of_flat_tree;
 728         ulong   relocate = 0;
 729         ulong   of_len = 0;
 730
 731         /* nothing to do */
 732         if (*of_size == 0)
 733                 return 0;
 734
 735         if (fdt_check_header (fdt_blob) != 0) {
 736                 fdt_error ("image is not a fdt");
 737                 goto error;
 738         }
 739
 740 #ifndef CFG_NO_FLASH
 741         /* move the blob if it is in flash (set relocate) */
 742         if (addr2info ((ulong)fdt_blob) != NULL)
 743                 relocate = 1;
 744 #endif
 745
 746         /*
 747          * The blob needs to be inside the boot mapping.
 748          */
 749         if (fdt_blob < (char *)bootmap_base)
 750                 relocate = 1;
 751
 752         if ((fdt_blob + *of_size + CFG_FDT_PAD) >=
 753                         ((char *)CFG_BOOTMAPSZ + bootmap_base))
 754                 relocate = 1;
 755
 756         /* move flattend device tree if needed */
 757         if (relocate) {
 758                 int err;
 759                 ulong of_start = 0;
 760
 761                 /* position on a 4K boundary before the alloc_current */
 762                 /* Pad the FDT by a specified amount */
 763                 of_len = *of_size + CFG_FDT_PAD;
 764                 of_start = (unsigned long)lmb_alloc_base(lmb, of_len, 0x1000,
 765                                 (CFG_BOOTMAPSZ + bootmap_base));
 766
 767                 if (of_start == 0) {
 768                         puts("device tree - allocation error\n");
 769                         goto error;
 770                 }
 771
 772                 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
 773                         (ulong)fdt_blob, (ulong)fdt_blob + *of_size - 1,
 774                         of_len, of_len);
 775
 776                 printf ("   Loading Device Tree to %08lx, end %08lx ... ",
 777                         of_start, of_start + of_len - 1);
 778
 779                 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
 780                 if (err != 0) {
 781                         fdt_error ("fdt move failed");
 782                         goto error;
 783                 }
 784                 puts ("OK\n");
 785
 786                 *of_flat_tree = (char *)of_start;
 787                 *of_size = of_len;
 788         } else {
 789                 *of_flat_tree = fdt_blob;
 790                 of_len = (CFG_BOOTMAPSZ + bootmap_base) - (ulong)fdt_blob;
 791                 lmb_reserve(lmb, (ulong)fdt_blob, of_len);
 792                 fdt_set_totalsize(*of_flat_tree, of_len);
 793
 794                 *of_size = of_len;
 795         }
 796
 797         return 0;
 798
 799 error:
 800         return 1;
 801 }
 802 #endif