common/spl/spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2010
   4  * Texas Instruments, <www.ti.com>
   5  *
   6  * Aneesh V <aneesh@ti.com>
   7  */
   8
   9 #include <common.h>
  10 #include <binman_sym.h>
  11 #include <dm.h>
  12 #include <spl.h>
  13 #include <asm/u-boot.h>
  14 #include <nand.h>
  15 #include <fat.h>
  16 #include <version.h>
  17 #include <image.h>
  18 #include <malloc.h>
  19 #include <dm/root.h>
  20 #include <linux/compiler.h>
  21 #include <fdt_support.h>
  22 #include <bootcount.h>
  23
  24 DECLARE_GLOBAL_DATA_PTR;
  25
  26 #ifndef CONFIG_SYS_UBOOT_START
  27 #define CONFIG_SYS_UBOOT_START  CONFIG_SYS_TEXT_BASE
  28 #endif
  29 #ifndef CONFIG_SYS_MONITOR_LEN
  30 /* Unknown U-Boot size, let's assume it will not be more than 200 KB */
  31 #define CONFIG_SYS_MONITOR_LEN  (200 * 1024)
  32 #endif
  33
  34 u32 *boot_params_ptr = NULL;
  35
  36 /* See spl.h for information about this */
  37 binman_sym_declare(ulong, u_boot_any, image_pos);
  38
  39 /* Define board data structure */
  40 static bd_t bdata __attribute__ ((section(".data")));
  41
  42 /*
  43  * Board-specific Platform code can reimplement show_boot_progress () if needed
  44  */
  45 __weak void show_boot_progress(int val) {}
  46
  47 /*
  48  * Default function to determine if u-boot or the OS should
  49  * be started. This implementation always returns 1.
  50  *
  51  * Please implement your own board specific funcion to do this.
  52  *
  53  * RETURN
  54  * 0 to not start u-boot
  55  * positive if u-boot should start
  56  */
  57 #ifdef CONFIG_SPL_OS_BOOT
  58 __weak int spl_start_uboot(void)
  59 {
  60         puts("SPL: Please implement spl_start_uboot() for your board\n");
  61         puts("SPL: Direct Linux boot not active!\n");
  62         return 1;
  63 }
  64
  65 /* weak default platform specific function to initialize
  66  * dram banks
  67  */
  68 __weak int dram_init_banksize(void)
  69 {
  70         return 0;
  71 }
  72
  73 /*
  74  * Weak default function for arch specific zImage check. Return zero
  75  * and fill start and end address if image is recognized.
  76  */
  77 int __weak bootz_setup(ulong image, ulong *start, ulong *end)
  78 {
  79          return 1;
  80 }
  81 #endif
  82
  83 /* Weak default function for arch/board-specific fixups to the spl_image_info */
  84 void __weak spl_perform_fixups(struct spl_image_info *spl_image)
  85 {
  86 }
  87
  88 void spl_fixup_fdt(void)
  89 {
  90 #if defined(CONFIG_SPL_OF_LIBFDT) && defined(CONFIG_SYS_SPL_ARGS_ADDR)
  91         void *fdt_blob = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
  92         int err;
  93
  94         err = fdt_check_header(fdt_blob);
  95         if (err < 0) {
  96                 printf("fdt_root: %s\n", fdt_strerror(err));
  97                 return;
  98         }
  99
 100         /* fixup the memory dt node */
 101         err = fdt_shrink_to_minimum(fdt_blob, 0);
 102         if (err == 0) {
 103                 printf("spl: fdt_shrink_to_minimum err - %d\n", err);
 104                 return;
 105         }
 106
 107         err = arch_fixup_fdt(fdt_blob);
 108         if (err) {
 109                 printf("spl: arch_fixup_fdt err - %d\n", err);
 110                 return;
 111         }
 112 #endif
 113 }
 114
 115 /*
 116  * Weak default function for board specific cleanup/preparation before
 117  * Linux boot. Some boards/platforms might not need it, so just provide
 118  * an empty stub here.
 119  */
 120 __weak void spl_board_prepare_for_linux(void)
 121 {
 122         /* Nothing to do! */
 123 }
 124
 125 __weak void spl_board_prepare_for_boot(void)
 126 {
 127         /* Nothing to do! */
 128 }
 129
 130 __weak struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
 131 {
 132         return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
 133 }
 134
 135 void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
 136 {
 137         ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
 138
 139         spl_image->size = CONFIG_SYS_MONITOR_LEN;
 140
 141         /*
 142          * Binman error cases: address of the end of the previous region or the
 143          * start of the image's entry area (usually 0) if there is no previous
 144          * region.
 145          */
 146         if (u_boot_pos && u_boot_pos != BINMAN_SYM_MISSING) {
 147                 /* Binman does not support separated entry addresses */
 148                 spl_image->entry_point = u_boot_pos;
 149                 spl_image->load_addr = u_boot_pos;
 150         } else {
 151                 spl_image->entry_point = CONFIG_SYS_UBOOT_START;
 152                 spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
 153         }
 154         spl_image->os = IH_OS_U_BOOT;
 155         spl_image->name = "U-Boot";
 156 }
 157
 158 #ifdef CONFIG_SPL_LOAD_FIT_FULL
 159 /* Parse and load full fitImage in SPL */
 160 static int spl_load_fit_image(struct spl_image_info *spl_image,
 161                               const struct image_header *header)
 162 {
 163         bootm_headers_t images;
 164         const char *fit_uname_config = NULL;
 165         const char *fit_uname_fdt = FIT_FDT_PROP;
 166         const char *uname;
 167         ulong fw_data = 0, dt_data = 0, img_data = 0;
 168         ulong fw_len = 0, dt_len = 0, img_len = 0;
 169         int idx, conf_noffset;
 170         int ret;
 171
 172 #ifdef CONFIG_SPL_FIT_SIGNATURE
 173         images.verify = 1;
 174 #endif
 175         ret = fit_image_load(&images, (ulong)header,
 176                              NULL, &fit_uname_config,
 177                              IH_ARCH_DEFAULT, IH_TYPE_STANDALONE, -1,
 178                              FIT_LOAD_REQUIRED, &fw_data, &fw_len);
 179         if (ret < 0)
 180                 return ret;
 181
 182         spl_image->size = fw_len;
 183         spl_image->entry_point = fw_data;
 184         spl_image->load_addr = fw_data;
 185         spl_image->os = IH_OS_U_BOOT;
 186         spl_image->name = "U-Boot";
 187
 188         debug("spl: payload image: %.*s load addr: 0x%lx size: %d\n",
 189               (int)sizeof(spl_image->name), spl_image->name,
 190                 spl_image->load_addr, spl_image->size);
 191
 192 #ifdef CONFIG_SPL_FIT_SIGNATURE
 193         images.verify = 1;
 194 #endif
 195         fit_image_load(&images, (ulong)header,
 196                        &fit_uname_fdt, &fit_uname_config,
 197                        IH_ARCH_DEFAULT, IH_TYPE_FLATDT, -1,
 198                        FIT_LOAD_OPTIONAL, &dt_data, &dt_len);
 199
 200         conf_noffset = fit_conf_get_node((const void *)header,
 201                                          fit_uname_config);
 202         if (conf_noffset <= 0)
 203                 return 0;
 204
 205         for (idx = 0;
 206              uname = fdt_stringlist_get((const void *)header, conf_noffset,
 207                                         FIT_LOADABLE_PROP, idx,
 208                                 NULL), uname;
 209              idx++)
 210         {
 211 #ifdef CONFIG_SPL_FIT_SIGNATURE
 212                 images.verify = 1;
 213 #endif
 214                 ret = fit_image_load(&images, (ulong)header,
 215                                      &uname, &fit_uname_config,
 216                                      IH_ARCH_DEFAULT, IH_TYPE_LOADABLE, -1,
 217                                      FIT_LOAD_OPTIONAL_NON_ZERO,
 218                                      &img_data, &img_len);
 219                 if (ret < 0)
 220                         return ret;
 221         }
 222
 223         return 0;
 224 }
 225 #endif
 226
 227 int spl_parse_image_header(struct spl_image_info *spl_image,
 228                            const struct image_header *header)
 229 {
 230 #ifdef CONFIG_SPL_LOAD_FIT_FULL
 231         int ret = spl_load_fit_image(spl_image, header);
 232
 233         if (!ret)
 234                 return ret;
 235 #endif
 236         if (image_get_magic(header) == IH_MAGIC) {
 237 #ifdef CONFIG_SPL_LEGACY_IMAGE_SUPPORT
 238                 u32 header_size = sizeof(struct image_header);
 239
 240                 if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
 241                         /*
 242                          * On some system (e.g. powerpc), the load-address and
 243                          * entry-point is located at address 0. We can't load
 244                          * to 0-0x40. So skip header in this case.
 245                          */
 246                         spl_image->load_addr = image_get_load(header);
 247                         spl_image->entry_point = image_get_ep(header);
 248                         spl_image->size = image_get_data_size(header);
 249                 } else {
 250                         spl_image->entry_point = image_get_load(header);
 251                         /* Load including the header */
 252                         spl_image->load_addr = spl_image->entry_point -
 253                                 header_size;
 254                         spl_image->size = image_get_data_size(header) +
 255                                 header_size;
 256                 }
 257                 spl_image->os = image_get_os(header);
 258                 spl_image->name = image_get_name(header);
 259                 debug("spl: payload image: %.*s load addr: 0x%lx size: %d\n",
 260                         IH_NMLEN, spl_image->name,
 261                         spl_image->load_addr, spl_image->size);
 262 #else
 263                 /* LEGACY image not supported */
 264                 debug("Legacy boot image support not enabled, proceeding to other boot methods\n");
 265                 return -EINVAL;
 266 #endif
 267         } else {
 268 #ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
 269                 /*
 270                  * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
 271                  * code which loads images in SPL cannot guarantee that
 272                  * absolutely all read errors will be reported.
 273                  * An example is the LPC32XX MLC NAND driver, which
 274                  * will consider that a completely unreadable NAND block
 275                  * is bad, and thus should be skipped silently.
 276                  */
 277                 panic("** no mkimage signature but raw image not supported");
 278 #endif
 279
 280 #ifdef CONFIG_SPL_OS_BOOT
 281                 ulong start, end;
 282
 283                 if (!bootz_setup((ulong)header, &start, &end)) {
 284                         spl_image->name = "Linux";
 285                         spl_image->os = IH_OS_LINUX;
 286                         spl_image->load_addr = CONFIG_SYS_LOAD_ADDR;
 287                         spl_image->entry_point = CONFIG_SYS_LOAD_ADDR;
 288                         spl_image->size = end - start;
 289                         debug("spl: payload zImage, load addr: 0x%lx size: %d\n",
 290                               spl_image->load_addr, spl_image->size);
 291                         return 0;
 292                 }
 293 #endif
 294
 295 #ifdef CONFIG_SPL_RAW_IMAGE_SUPPORT
 296                 /* Signature not found - assume u-boot.bin */
 297                 debug("mkimage signature not found - ih_magic = %x\n",
 298                         header->ih_magic);
 299                 spl_set_header_raw_uboot(spl_image);
 300 #else
 301                 /* RAW image not supported, proceed to other boot methods. */
 302                 debug("Raw boot image support not enabled, proceeding to other boot methods\n");
 303                 return -EINVAL;
 304 #endif
 305         }
 306
 307         return 0;
 308 }
 309
 310 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 311 {
 312         typedef void __noreturn (*image_entry_noargs_t)(void);
 313
 314         image_entry_noargs_t image_entry =
 315                 (image_entry_noargs_t)spl_image->entry_point;
 316
 317         debug("image entry point: 0x%lX\n", spl_image->entry_point);
 318         image_entry();
 319 }
 320
 321 static int spl_common_init(bool setup_malloc)
 322 {
 323         int ret;
 324
 325 #if CONFIG_VAL(SYS_MALLOC_F_LEN)
 326         if (setup_malloc) {
 327 #ifdef CONFIG_MALLOC_F_ADDR
 328                 gd->malloc_base = CONFIG_MALLOC_F_ADDR;
 329 #endif
 330                 gd->malloc_limit = CONFIG_VAL(SYS_MALLOC_F_LEN);
 331                 gd->malloc_ptr = 0;
 332         }
 333 #endif
 334         ret = bootstage_init(true);
 335         if (ret) {
 336                 debug("%s: Failed to set up bootstage: ret=%d\n", __func__,
 337                       ret);
 338                 return ret;
 339         }
 340         bootstage_mark_name(BOOTSTAGE_ID_START_SPL, "spl");
 341         if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
 342                 ret = fdtdec_setup();
 343                 if (ret) {
 344                         debug("fdtdec_setup() returned error %d\n", ret);
 345                         return ret;
 346                 }
 347         }
 348         if (CONFIG_IS_ENABLED(DM)) {
 349                 bootstage_start(BOOTSTATE_ID_ACCUM_DM_SPL, "dm_spl");
 350                 /* With CONFIG_SPL_OF_PLATDATA, bring in all devices */
 351                 ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
 352                 bootstage_accum(BOOTSTATE_ID_ACCUM_DM_SPL);
 353                 if (ret) {
 354                         debug("dm_init_and_scan() returned error %d\n", ret);
 355                         return ret;
 356                 }
 357         }
 358
 359         return 0;
 360 }
 361
 362 void spl_set_bd(void)
 363 {
 364         if (!gd->bd)
 365                 gd->bd = &bdata;
 366 }
 367
 368 int spl_early_init(void)
 369 {
 370         int ret;
 371
 372         debug("%s\n", __func__);
 373
 374         ret = spl_common_init(true);
 375         if (ret)
 376                 return ret;
 377         gd->flags |= GD_FLG_SPL_EARLY_INIT;
 378
 379         return 0;
 380 }
 381
 382 int spl_init(void)
 383 {
 384         int ret;
 385         bool setup_malloc = !(IS_ENABLED(CONFIG_SPL_STACK_R) &&
 386                         IS_ENABLED(CONFIG_SPL_SYS_MALLOC_SIMPLE));
 387
 388         debug("%s\n", __func__);
 389
 390         if (!(gd->flags & GD_FLG_SPL_EARLY_INIT)) {
 391                 ret = spl_common_init(setup_malloc);
 392                 if (ret)
 393                         return ret;
 394         }
 395         gd->flags |= GD_FLG_SPL_INIT;
 396
 397         return 0;
 398 }
 399
 400 #ifndef BOOT_DEVICE_NONE
 401 #define BOOT_DEVICE_NONE 0xdeadbeef
 402 #endif
 403
 404 __weak void board_boot_order(u32 *spl_boot_list)
 405 {
 406         spl_boot_list[0] = spl_boot_device();
 407 }
 408
 409 static struct spl_image_loader *spl_ll_find_loader(uint boot_device)
 410 {
 411         struct spl_image_loader *drv =
 412                 ll_entry_start(struct spl_image_loader, spl_image_loader);
 413         const int n_ents =
 414                 ll_entry_count(struct spl_image_loader, spl_image_loader);
 415         struct spl_image_loader *entry;
 416
 417         for (entry = drv; entry != drv + n_ents; entry++) {
 418                 if (boot_device == entry->boot_device)
 419                         return entry;
 420         }
 421
 422         /* Not found */
 423         return NULL;
 424 }
 425
 426 static int spl_load_image(struct spl_image_info *spl_image,
 427                           struct spl_image_loader *loader)
 428 {
 429         struct spl_boot_device bootdev;
 430
 431         bootdev.boot_device = loader->boot_device;
 432         bootdev.boot_device_name = NULL;
 433
 434         return loader->load_image(spl_image, &bootdev);
 435 }
 436
 437 /**
 438  * boot_from_devices() - Try loading an booting U-Boot from a list of devices
 439  *
 440  * @spl_image: Place to put the image details if successful
 441  * @spl_boot_list: List of boot devices to try
 442  * @count: Number of elements in spl_boot_list
 443  * @return 0 if OK, -ve on error
 444  */
 445 static int boot_from_devices(struct spl_image_info *spl_image,
 446                              u32 spl_boot_list[], int count)
 447 {
 448         int i;
 449
 450         for (i = 0; i < count && spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
 451                 struct spl_image_loader *loader;
 452
 453                 loader = spl_ll_find_loader(spl_boot_list[i]);
 454 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 455                 if (loader)
 456                         printf("Trying to boot from %s\n", loader->name);
 457                 else
 458                         puts("SPL: Unsupported Boot Device!\n");
 459 #endif
 460                 if (loader && !spl_load_image(spl_image, loader)) {
 461                         spl_image->boot_device = spl_boot_list[i];
 462                         return 0;
 463                 }
 464         }
 465
 466         return -ENODEV;
 467 }
 468
 469 void board_init_r(gd_t *dummy1, ulong dummy2)
 470 {
 471         u32 spl_boot_list[] = {
 472                 BOOT_DEVICE_NONE,
 473                 BOOT_DEVICE_NONE,
 474                 BOOT_DEVICE_NONE,
 475                 BOOT_DEVICE_NONE,
 476                 BOOT_DEVICE_NONE,
 477         };
 478         struct spl_image_info spl_image;
 479
 480         debug(">>spl:board_init_r()\n");
 481
 482         spl_set_bd();
 483
 484 #ifdef CONFIG_SPL_OS_BOOT
 485         dram_init_banksize();
 486 #endif
 487
 488 #if defined(CONFIG_SYS_SPL_MALLOC_START)
 489         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 490                         CONFIG_SYS_SPL_MALLOC_SIZE);
 491         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 492 #endif
 493         if (!(gd->flags & GD_FLG_SPL_INIT)) {
 494                 if (spl_init())
 495                         hang();
 496         }
 497 #if !defined(CONFIG_PPC) && !defined(CONFIG_ARCH_MX6)
 498         /*
 499          * timer_init() does not exist on PPC systems. The timer is initialized
 500          * and enabled (decrementer) in interrupt_init() here.
 501          */
 502         timer_init();
 503 #endif
 504
 505 #if CONFIG_IS_ENABLED(BOARD_INIT)
 506         spl_board_init();
 507 #endif
 508
 509         bootcount_inc();
 510
 511         memset(&spl_image, '\0', sizeof(spl_image));
 512 #ifdef CONFIG_SYS_SPL_ARGS_ADDR
 513         spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
 514 #endif
 515         spl_image.boot_device = BOOT_DEVICE_NONE;
 516         board_boot_order(spl_boot_list);
 517
 518         if (boot_from_devices(&spl_image, spl_boot_list,
 519                               ARRAY_SIZE(spl_boot_list))) {
 520                 puts("SPL: failed to boot from all boot devices\n");
 521                 hang();
 522         }
 523
 524         spl_perform_fixups(&spl_image);
 525
 526 #ifdef CONFIG_CPU_V7M
 527         spl_image.entry_point |= 0x1;
 528 #endif
 529         switch (spl_image.os) {
 530         case IH_OS_U_BOOT:
 531                 debug("Jumping to U-Boot\n");
 532                 break;
 533 #if CONFIG_IS_ENABLED(ATF)
 534         case IH_OS_ARM_TRUSTED_FIRMWARE:
 535                 debug("Jumping to U-Boot via ARM Trusted Firmware\n");
 536                 spl_invoke_atf(&spl_image);
 537                 break;
 538 #endif
 539 #ifdef CONFIG_SPL_OS_BOOT
 540         case IH_OS_LINUX:
 541                 debug("Jumping to Linux\n");
 542                 spl_fixup_fdt();
 543                 spl_board_prepare_for_linux();
 544                 jump_to_image_linux(&spl_image);
 545 #endif
 546         default:
 547                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 548         }
 549 #if CONFIG_VAL(SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 550         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
 551               gd->malloc_ptr / 1024);
 552 #endif
 553 #ifdef CONFIG_BOOTSTAGE_STASH
 554         int ret;
 555
 556         bootstage_mark_name(BOOTSTAGE_ID_END_SPL, "end_spl");
 557         ret = bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
 558                               CONFIG_BOOTSTAGE_STASH_SIZE);
 559         if (ret)
 560                 debug("Failed to stash bootstage: err=%d\n", ret);
 561 #endif
 562
 563         debug("loaded - jumping to U-Boot...\n");
 564         spl_board_prepare_for_boot();
 565         jump_to_image_no_args(&spl_image);
 566 }
 567
 568 #ifdef CONFIG_SPL_SERIAL_SUPPORT
 569 /*
 570  * This requires UART clocks to be enabled.  In order for this to work the
 571  * caller must ensure that the gd pointer is valid.
 572  */
 573 void preloader_console_init(void)
 574 {
 575         gd->baudrate = CONFIG_BAUDRATE;
 576
 577         serial_init();          /* serial communications setup */
 578
 579         gd->have_console = 1;
 580
 581 #ifndef CONFIG_SPL_DISABLE_BANNER_PRINT
 582         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 583                         U_BOOT_TIME " " U_BOOT_TZ ")\n");
 584 #endif
 585 #ifdef CONFIG_SPL_DISPLAY_PRINT
 586         spl_display_print();
 587 #endif
 588 }
 589 #endif
 590
 591 /**
 592  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 593  *
 594  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 595  * for the main board_init_r() execution. This is typically because we need
 596  * more stack space for things like the MMC sub-system.
 597  *
 598  * This function calculates the stack position, copies the global_data into
 599  * place, sets the new gd (except for ARM, for which setting GD within a C
 600  * function may not always work) and returns the new stack position. The
 601  * caller is responsible for setting up the sp register and, in the case
 602  * of ARM, setting up gd.
 603  *
 604  * All of this is done using the same layout and alignments as done in
 605  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
 606  *
 607  * @return new stack location, or 0 to use the same stack
 608  */
 609 ulong spl_relocate_stack_gd(void)
 610 {
 611 #ifdef CONFIG_SPL_STACK_R
 612         gd_t *new_gd;
 613         ulong ptr = CONFIG_SPL_STACK_R_ADDR;
 614
 615 #if defined(CONFIG_SPL_SYS_MALLOC_SIMPLE) && CONFIG_VAL(SYS_MALLOC_F_LEN)
 616         if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
 617                 ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 618                 gd->malloc_base = ptr;
 619                 gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 620                 gd->malloc_ptr = 0;
 621         }
 622 #endif
 623         /* Get stack position: use 8-byte alignment for ABI compliance */
 624         ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
 625         new_gd = (gd_t *)ptr;
 626         memcpy(new_gd, (void *)gd, sizeof(gd_t));
 627 #if CONFIG_IS_ENABLED(DM)
 628         dm_fixup_for_gd_move(new_gd);
 629 #endif
 630 #if !defined(CONFIG_ARM)
 631         gd = new_gd;
 632 #endif
 633         return ptr;
 634 #else
 635         return 0;
 636 #endif
 637 }