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 <[email protected]>
   7  */
   8
   9 #include <common.h>
  10 #include <bloblist.h>
  11 #include <binman_sym.h>
  12 #include <dm.h>
  13 #include <spl.h>
  14 #include <asm/u-boot.h>
  15 #include <nand.h>
  16 #include <fat.h>
  17 #include <version.h>
  18 #include <image.h>
  19 #include <malloc.h>
  20 #include <dm/root.h>
  21 #include <linux/compiler.h>
  22 #include <fdt_support.h>
  23 #include <bootcount.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 #ifndef CONFIG_SYS_UBOOT_START
  28 #define CONFIG_SYS_UBOOT_START  CONFIG_SYS_TEXT_BASE
  29 #endif
  30 #ifndef CONFIG_SYS_MONITOR_LEN
  31 /* Unknown U-Boot size, let's assume it will not be more than 200 KB */
  32 #define CONFIG_SYS_MONITOR_LEN  (200 * 1024)
  33 #endif
  34
  35 u32 *boot_params_ptr = NULL;
  36
  37 /* See spl.h for information about this */
  38 binman_sym_declare(ulong, u_boot_any, image_pos);
  39
  40 /* Define board data structure */
  41 static bd_t bdata __attribute__ ((section(".data")));
  42
  43 /*
  44  * Board-specific Platform code can reimplement show_boot_progress () if needed
  45  */
  46 __weak void show_boot_progress(int val) {}
  47
  48 /*
  49  * Default function to determine if u-boot or the OS should
  50  * be started. This implementation always returns 1.
  51  *
  52  * Please implement your own board specific funcion to do this.
  53  *
  54  * RETURN
  55  * 0 to not start u-boot
  56  * positive if u-boot should start
  57  */
  58 #ifdef CONFIG_SPL_OS_BOOT
  59 __weak int spl_start_uboot(void)
  60 {
  61         puts("SPL: Please implement spl_start_uboot() for your board\n");
  62         puts("SPL: Direct Linux boot not active!\n");
  63         return 1;
  64 }
  65
  66 /* weak default platform specific function to initialize
  67  * dram banks
  68  */
  69 __weak int dram_init_banksize(void)
  70 {
  71         return 0;
  72 }
  73
  74 /*
  75  * Weak default function for arch specific zImage check. Return zero
  76  * and fill start and end address if image is recognized.
  77  */
  78 int __weak bootz_setup(ulong image, ulong *start, ulong *end)
  79 {
  80          return 1;
  81 }
  82 #endif
  83
  84 /* Weak default function for arch/board-specific fixups to the spl_image_info */
  85 void __weak spl_perform_fixups(struct spl_image_info *spl_image)
  86 {
  87 }
  88
  89 void spl_fixup_fdt(void)
  90 {
  91 #if defined(CONFIG_SPL_OF_LIBFDT) && defined(CONFIG_SYS_SPL_ARGS_ADDR)
  92         void *fdt_blob = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
  93         int err;
  94
  95         err = fdt_check_header(fdt_blob);
  96         if (err < 0) {
  97                 printf("fdt_root: %s\n", fdt_strerror(err));
  98                 return;
  99         }
 100
 101         /* fixup the memory dt node */
 102         err = fdt_shrink_to_minimum(fdt_blob, 0);
 103         if (err == 0) {
 104                 printf("spl: fdt_shrink_to_minimum err - %d\n", err);
 105                 return;
 106         }
 107
 108         err = arch_fixup_fdt(fdt_blob);
 109         if (err) {
 110                 printf("spl: arch_fixup_fdt err - %d\n", err);
 111                 return;
 112         }
 113 #endif
 114 }
 115
 116 /*
 117  * Weak default function for board specific cleanup/preparation before
 118  * Linux boot. Some boards/platforms might not need it, so just provide
 119  * an empty stub here.
 120  */
 121 __weak void spl_board_prepare_for_linux(void)
 122 {
 123         /* Nothing to do! */
 124 }
 125
 126 __weak void spl_board_prepare_for_boot(void)
 127 {
 128         /* Nothing to do! */
 129 }
 130
 131 __weak struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
 132 {
 133         return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
 134 }
 135
 136 void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
 137 {
 138         ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
 139
 140         spl_image->size = CONFIG_SYS_MONITOR_LEN;
 141
 142         /*
 143          * Binman error cases: address of the end of the previous region or the
 144          * start of the image's entry area (usually 0) if there is no previous
 145          * region.
 146          */
 147         if (u_boot_pos && u_boot_pos != BINMAN_SYM_MISSING) {
 148                 /* Binman does not support separated entry addresses */
 149                 spl_image->entry_point = u_boot_pos;
 150                 spl_image->load_addr = u_boot_pos;
 151         } else {
 152                 spl_image->entry_point = CONFIG_SYS_UBOOT_START;
 153                 spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
 154         }
 155         spl_image->os = IH_OS_U_BOOT;
 156         spl_image->name = "U-Boot";
 157 }
 158
 159 #ifdef CONFIG_SPL_LOAD_FIT_FULL
 160 /* Parse and load full fitImage in SPL */
 161 static int spl_load_fit_image(struct spl_image_info *spl_image,
 162                               const struct image_header *header)
 163 {
 164         bootm_headers_t images;
 165         const char *fit_uname_config = NULL;
 166         const char *fit_uname_fdt = FIT_FDT_PROP;
 167         const char *uname;
 168         ulong fw_data = 0, dt_data = 0, img_data = 0;
 169         ulong fw_len = 0, dt_len = 0, img_len = 0;
 170         int idx, conf_noffset;
 171         int ret;
 172
 173 #ifdef CONFIG_SPL_FIT_SIGNATURE
 174         images.verify = 1;
 175 #endif
 176         ret = fit_image_load(&images, (ulong)header,
 177                              NULL, &fit_uname_config,
 178                              IH_ARCH_DEFAULT, IH_TYPE_STANDALONE, -1,
 179                              FIT_LOAD_REQUIRED, &fw_data, &fw_len);
 180         if (ret < 0)
 181                 return ret;
 182
 183         spl_image->size = fw_len;
 184         spl_image->entry_point = fw_data;
 185         spl_image->load_addr = fw_data;
 186         spl_image->os = IH_OS_U_BOOT;
 187         spl_image->name = "U-Boot";
 188
 189         debug("spl: payload image: %32s load addr: 0x%lx size: %d\n",
 190               spl_image->name, 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: %32s load addr: 0x%lx size: %d\n",
 260                       spl_image->name, spl_image->load_addr, spl_image->size);
 261 #else
 262                 /* LEGACY image not supported */
 263                 debug("Legacy boot image support not enabled, proceeding to other boot methods\n");
 264                 return -EINVAL;
 265 #endif
 266         } else {
 267 #ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
 268                 /*
 269                  * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
 270                  * code which loads images in SPL cannot guarantee that
 271                  * absolutely all read errors will be reported.
 272                  * An example is the LPC32XX MLC NAND driver, which
 273                  * will consider that a completely unreadable NAND block
 274                  * is bad, and thus should be skipped silently.
 275                  */
 276                 panic("** no mkimage signature but raw image not supported");
 277 #endif
 278
 279 #ifdef CONFIG_SPL_OS_BOOT
 280                 ulong start, end;
 281
 282                 if (!bootz_setup((ulong)header, &start, &end)) {
 283                         spl_image->name = "Linux";
 284                         spl_image->os = IH_OS_LINUX;
 285                         spl_image->load_addr = CONFIG_SYS_LOAD_ADDR;
 286                         spl_image->entry_point = CONFIG_SYS_LOAD_ADDR;
 287                         spl_image->size = end - start;
 288                         debug("spl: payload zImage, load addr: 0x%lx size: %d\n",
 289                               spl_image->load_addr, spl_image->size);
 290                         return 0;
 291                 }
 292 #endif
 293
 294 #ifdef CONFIG_SPL_RAW_IMAGE_SUPPORT
 295                 /* Signature not found - assume u-boot.bin */
 296                 debug("mkimage signature not found - ih_magic = %x\n",
 297                         header->ih_magic);
 298                 spl_set_header_raw_uboot(spl_image);
 299 #else
 300                 /* RAW image not supported, proceed to other boot methods. */
 301                 debug("Raw boot image support not enabled, proceeding to other boot methods\n");
 302                 return -EINVAL;
 303 #endif
 304         }
 305
 306         return 0;
 307 }
 308
 309 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 310 {
 311         typedef void __noreturn (*image_entry_noargs_t)(void);
 312
 313         image_entry_noargs_t image_entry =
 314                 (image_entry_noargs_t)spl_image->entry_point;
 315
 316         debug("image entry point: 0x%lx\n", spl_image->entry_point);
 317         image_entry();
 318 }
 319
 320 static int spl_common_init(bool setup_malloc)
 321 {
 322         int ret;
 323
 324 #if CONFIG_VAL(SYS_MALLOC_F_LEN)
 325         if (setup_malloc) {
 326 #ifdef CONFIG_MALLOC_F_ADDR
 327                 gd->malloc_base = CONFIG_MALLOC_F_ADDR;
 328 #endif
 329                 gd->malloc_limit = CONFIG_VAL(SYS_MALLOC_F_LEN);
 330                 gd->malloc_ptr = 0;
 331         }
 332 #endif
 333         ret = bootstage_init(true);
 334         if (ret) {
 335                 debug("%s: Failed to set up bootstage: ret=%d\n", __func__,
 336                       ret);
 337                 return ret;
 338         }
 339         bootstage_mark_name(BOOTSTAGE_ID_START_SPL, "spl");
 340 #if CONFIG_IS_ENABLED(LOG)
 341         ret = log_init();
 342         if (ret) {
 343                 debug("%s: Failed to set up logging\n", __func__);
 344                 return ret;
 345         }
 346 #endif
 347         if (CONFIG_IS_ENABLED(BLOBLIST)) {
 348                 ret = bloblist_init();
 349                 if (ret) {
 350                         debug("%s: Failed to set up bloblist: ret=%d\n",
 351                               __func__, ret);
 352                         return ret;
 353                 }
 354         }
 355         if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
 356                 ret = fdtdec_setup();
 357                 if (ret) {
 358                         debug("fdtdec_setup() returned error %d\n", ret);
 359                         return ret;
 360                 }
 361         }
 362         if (CONFIG_IS_ENABLED(DM)) {
 363                 bootstage_start(BOOTSTATE_ID_ACCUM_DM_SPL, "dm_spl");
 364                 /* With CONFIG_SPL_OF_PLATDATA, bring in all devices */
 365                 ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
 366                 bootstage_accum(BOOTSTATE_ID_ACCUM_DM_SPL);
 367                 if (ret) {
 368                         debug("dm_init_and_scan() returned error %d\n", ret);
 369                         return ret;
 370                 }
 371         }
 372
 373         return 0;
 374 }
 375
 376 void spl_set_bd(void)
 377 {
 378         if (!gd->bd)
 379                 gd->bd = &bdata;
 380 }
 381
 382 int spl_early_init(void)
 383 {
 384         int ret;
 385
 386         debug("%s\n", __func__);
 387
 388         ret = spl_common_init(true);
 389         if (ret)
 390                 return ret;
 391         gd->flags |= GD_FLG_SPL_EARLY_INIT;
 392
 393         return 0;
 394 }
 395
 396 int spl_init(void)
 397 {
 398         int ret;
 399         bool setup_malloc = !(IS_ENABLED(CONFIG_SPL_STACK_R) &&
 400                         IS_ENABLED(CONFIG_SPL_SYS_MALLOC_SIMPLE));
 401
 402         debug("%s\n", __func__);
 403
 404         if (!(gd->flags & GD_FLG_SPL_EARLY_INIT)) {
 405                 ret = spl_common_init(setup_malloc);
 406                 if (ret)
 407                         return ret;
 408         }
 409         gd->flags |= GD_FLG_SPL_INIT;
 410
 411         return 0;
 412 }
 413
 414 #ifndef BOOT_DEVICE_NONE
 415 #define BOOT_DEVICE_NONE 0xdeadbeef
 416 #endif
 417
 418 __weak void board_boot_order(u32 *spl_boot_list)
 419 {
 420         spl_boot_list[0] = spl_boot_device();
 421 }
 422
 423 static struct spl_image_loader *spl_ll_find_loader(uint boot_device)
 424 {
 425         struct spl_image_loader *drv =
 426                 ll_entry_start(struct spl_image_loader, spl_image_loader);
 427         const int n_ents =
 428                 ll_entry_count(struct spl_image_loader, spl_image_loader);
 429         struct spl_image_loader *entry;
 430
 431         for (entry = drv; entry != drv + n_ents; entry++) {
 432                 if (boot_device == entry->boot_device)
 433                         return entry;
 434         }
 435
 436         /* Not found */
 437         return NULL;
 438 }
 439
 440 static int spl_load_image(struct spl_image_info *spl_image,
 441                           struct spl_image_loader *loader)
 442 {
 443         struct spl_boot_device bootdev;
 444
 445         bootdev.boot_device = loader->boot_device;
 446         bootdev.boot_device_name = NULL;
 447
 448         return loader->load_image(spl_image, &bootdev);
 449 }
 450
 451 /**
 452  * boot_from_devices() - Try loading an booting U-Boot from a list of devices
 453  *
 454  * @spl_image: Place to put the image details if successful
 455  * @spl_boot_list: List of boot devices to try
 456  * @count: Number of elements in spl_boot_list
 457  * @return 0 if OK, -ve on error
 458  */
 459 static int boot_from_devices(struct spl_image_info *spl_image,
 460                              u32 spl_boot_list[], int count)
 461 {
 462         int i;
 463
 464         for (i = 0; i < count && spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
 465                 struct spl_image_loader *loader;
 466
 467                 loader = spl_ll_find_loader(spl_boot_list[i]);
 468 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 469                 if (loader)
 470                         printf("Trying to boot from %s\n", loader->name);
 471                 else
 472                         puts("SPL: Unsupported Boot Device!\n");
 473 #endif
 474                 if (loader && !spl_load_image(spl_image, loader)) {
 475                         spl_image->boot_device = spl_boot_list[i];
 476                         return 0;
 477                 }
 478         }
 479
 480         return -ENODEV;
 481 }
 482
 483 void board_init_r(gd_t *dummy1, ulong dummy2)
 484 {
 485         u32 spl_boot_list[] = {
 486                 BOOT_DEVICE_NONE,
 487                 BOOT_DEVICE_NONE,
 488                 BOOT_DEVICE_NONE,
 489                 BOOT_DEVICE_NONE,
 490                 BOOT_DEVICE_NONE,
 491         };
 492         struct spl_image_info spl_image;
 493         int ret;
 494
 495         debug(">>spl:board_init_r()\n");
 496
 497         spl_set_bd();
 498
 499 #ifdef CONFIG_SPL_OS_BOOT
 500         dram_init_banksize();
 501 #endif
 502
 503 #if defined(CONFIG_SYS_SPL_MALLOC_START)
 504         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 505                         CONFIG_SYS_SPL_MALLOC_SIZE);
 506         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 507 #endif
 508         if (!(gd->flags & GD_FLG_SPL_INIT)) {
 509                 if (spl_init())
 510                         hang();
 511         }
 512 #if !defined(CONFIG_PPC) && !defined(CONFIG_ARCH_MX6)
 513         /*
 514          * timer_init() does not exist on PPC systems. The timer is initialized
 515          * and enabled (decrementer) in interrupt_init() here.
 516          */
 517         timer_init();
 518 #endif
 519
 520 #if CONFIG_IS_ENABLED(BOARD_INIT)
 521         spl_board_init();
 522 #endif
 523
 524         bootcount_inc();
 525
 526         memset(&spl_image, '\0', sizeof(spl_image));
 527 #ifdef CONFIG_SYS_SPL_ARGS_ADDR
 528         spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
 529 #endif
 530         spl_image.boot_device = BOOT_DEVICE_NONE;
 531         board_boot_order(spl_boot_list);
 532
 533         if (boot_from_devices(&spl_image, spl_boot_list,
 534                               ARRAY_SIZE(spl_boot_list))) {
 535                 puts("SPL: failed to boot from all boot devices\n");
 536                 hang();
 537         }
 538
 539         spl_perform_fixups(&spl_image);
 540         if (CONFIG_IS_ENABLED(BLOBLIST)) {
 541                 ret = bloblist_finish();
 542                 if (ret)
 543                         printf("Warning: Failed to finish bloblist (ret=%d)\n",
 544                                ret);
 545         }
 546
 547 #ifdef CONFIG_CPU_V7M
 548         spl_image.entry_point |= 0x1;
 549 #endif
 550         switch (spl_image.os) {
 551         case IH_OS_U_BOOT:
 552                 debug("Jumping to U-Boot\n");
 553                 break;
 554 #if CONFIG_IS_ENABLED(ATF)
 555         case IH_OS_ARM_TRUSTED_FIRMWARE:
 556                 debug("Jumping to U-Boot via ARM Trusted Firmware\n");
 557                 spl_invoke_atf(&spl_image);
 558                 break;
 559 #endif
 560 #if CONFIG_IS_ENABLED(OPTEE)
 561         case IH_OS_TEE:
 562                 debug("Jumping to U-Boot via OP-TEE\n");
 563                 spl_optee_entry(NULL, NULL, spl_image.fdt_addr,
 564                                 (void *)spl_image.entry_point);
 565                 break;
 566 #endif
 567 #ifdef CONFIG_SPL_OS_BOOT
 568         case IH_OS_LINUX:
 569                 debug("Jumping to Linux\n");
 570                 spl_fixup_fdt();
 571                 spl_board_prepare_for_linux();
 572                 jump_to_image_linux(&spl_image);
 573 #endif
 574         default:
 575                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 576         }
 577 #if CONFIG_VAL(SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 578         debug("SPL malloc() used 0x%lx bytes (%ld KB)\n", gd->malloc_ptr,
 579               gd->malloc_ptr / 1024);
 580 #endif
 581 #ifdef CONFIG_BOOTSTAGE_STASH
 582         bootstage_mark_name(BOOTSTAGE_ID_END_SPL, "end_spl");
 583         ret = bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
 584                               CONFIG_BOOTSTAGE_STASH_SIZE);
 585         if (ret)
 586                 debug("Failed to stash bootstage: err=%d\n", ret);
 587 #endif
 588
 589         debug("loaded - jumping to U-Boot...\n");
 590         spl_board_prepare_for_boot();
 591         jump_to_image_no_args(&spl_image);
 592 }
 593
 594 #ifdef CONFIG_SPL_SERIAL_SUPPORT
 595 /*
 596  * This requires UART clocks to be enabled.  In order for this to work the
 597  * caller must ensure that the gd pointer is valid.
 598  */
 599 void preloader_console_init(void)
 600 {
 601         gd->baudrate = CONFIG_BAUDRATE;
 602
 603         serial_init();          /* serial communications setup */
 604
 605         gd->have_console = 1;
 606
 607 #ifndef CONFIG_SPL_DISABLE_BANNER_PRINT
 608         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 609                         U_BOOT_TIME " " U_BOOT_TZ ")\n");
 610 #endif
 611 #ifdef CONFIG_SPL_DISPLAY_PRINT
 612         spl_display_print();
 613 #endif
 614 }
 615 #endif
 616
 617 /**
 618  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 619  *
 620  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 621  * for the main board_init_r() execution. This is typically because we need
 622  * more stack space for things like the MMC sub-system.
 623  *
 624  * This function calculates the stack position, copies the global_data into
 625  * place, sets the new gd (except for ARM, for which setting GD within a C
 626  * function may not always work) and returns the new stack position. The
 627  * caller is responsible for setting up the sp register and, in the case
 628  * of ARM, setting up gd.
 629  *
 630  * All of this is done using the same layout and alignments as done in
 631  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
 632  *
 633  * @return new stack location, or 0 to use the same stack
 634  */
 635 ulong spl_relocate_stack_gd(void)
 636 {
 637 #ifdef CONFIG_SPL_STACK_R
 638         gd_t *new_gd;
 639         ulong ptr = CONFIG_SPL_STACK_R_ADDR;
 640
 641 #if defined(CONFIG_SPL_SYS_MALLOC_SIMPLE) && CONFIG_VAL(SYS_MALLOC_F_LEN)
 642         if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
 643                 ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 644                 gd->malloc_base = ptr;
 645                 gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 646                 gd->malloc_ptr = 0;
 647         }
 648 #endif
 649         /* Get stack position: use 8-byte alignment for ABI compliance */
 650         ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
 651         new_gd = (gd_t *)ptr;
 652         memcpy(new_gd, (void *)gd, sizeof(gd_t));
 653 #if CONFIG_IS_ENABLED(DM)
 654         dm_fixup_for_gd_move(new_gd);
 655 #endif
 656 #if !defined(CONFIG_ARM)
 657         gd = new_gd;
 658 #endif
 659         return ptr;
 660 #else
 661         return 0;
 662 #endif
 663 }