common/spl/spl.c

   1 /*
   2  * (C) Copyright 2010
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Aneesh V <aneesh@ti.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.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
  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, 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 void spl_fixup_fdt(void)
  84 {
  85 #if defined(CONFIG_SPL_OF_LIBFDT) && defined(CONFIG_SYS_SPL_ARGS_ADDR)
  86         void *fdt_blob = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
  87         int err;
  88
  89         err = fdt_check_header(fdt_blob);
  90         if (err < 0) {
  91                 printf("fdt_root: %s\n", fdt_strerror(err));
  92                 return;
  93         }
  94
  95         /* fixup the memory dt node */
  96         err = fdt_shrink_to_minimum(fdt_blob, 0);
  97         if (err == 0) {
  98                 printf("spl: fdt_shrink_to_minimum err - %d\n", err);
  99                 return;
 100         }
 101
 102         err = arch_fixup_fdt(fdt_blob);
 103         if (err) {
 104                 printf("spl: arch_fixup_fdt err - %d\n", err);
 105                 return;
 106         }
 107 #endif
 108 }
 109
 110 /*
 111  * Weak default function for board specific cleanup/preparation before
 112  * Linux boot. Some boards/platforms might not need it, so just provide
 113  * an empty stub here.
 114  */
 115 __weak void spl_board_prepare_for_linux(void)
 116 {
 117         /* Nothing to do! */
 118 }
 119
 120 __weak void spl_board_prepare_for_boot(void)
 121 {
 122         /* Nothing to do! */
 123 }
 124
 125 void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
 126 {
 127         ulong u_boot_pos = binman_sym(ulong, u_boot_any, pos);
 128
 129         spl_image->size = CONFIG_SYS_MONITOR_LEN;
 130         if (u_boot_pos != BINMAN_SYM_MISSING) {
 131                 /* biman does not support separate entry addresses at present */
 132                 spl_image->entry_point = u_boot_pos;
 133                 spl_image->load_addr = u_boot_pos;
 134         } else {
 135                 spl_image->entry_point = CONFIG_SYS_UBOOT_START;
 136                 spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
 137         }
 138         spl_image->os = IH_OS_U_BOOT;
 139         spl_image->name = "U-Boot";
 140 }
 141
 142 int spl_parse_image_header(struct spl_image_info *spl_image,
 143                            const struct image_header *header)
 144 {
 145         if (image_get_magic(header) == IH_MAGIC) {
 146 #ifdef CONFIG_SPL_LEGACY_IMAGE_SUPPORT
 147                 u32 header_size = sizeof(struct image_header);
 148
 149                 if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
 150                         /*
 151                          * On some system (e.g. powerpc), the load-address and
 152                          * entry-point is located at address 0. We can't load
 153                          * to 0-0x40. So skip header in this case.
 154                          */
 155                         spl_image->load_addr = image_get_load(header);
 156                         spl_image->entry_point = image_get_ep(header);
 157                         spl_image->size = image_get_data_size(header);
 158                 } else {
 159                         spl_image->entry_point = image_get_load(header);
 160                         /* Load including the header */
 161                         spl_image->load_addr = spl_image->entry_point -
 162                                 header_size;
 163                         spl_image->size = image_get_data_size(header) +
 164                                 header_size;
 165                 }
 166                 spl_image->os = image_get_os(header);
 167                 spl_image->name = image_get_name(header);
 168                 debug("spl: payload image: %.*s load addr: 0x%lx size: %d\n",
 169                         IH_NMLEN, spl_image->name,
 170                         spl_image->load_addr, spl_image->size);
 171 #else
 172                 /* LEGACY image not supported */
 173                 debug("Legacy boot image support not enabled, proceeding to other boot methods\n");
 174                 return -EINVAL;
 175 #endif
 176         } else {
 177 #ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
 178                 /*
 179                  * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
 180                  * code which loads images in SPL cannot guarantee that
 181                  * absolutely all read errors will be reported.
 182                  * An example is the LPC32XX MLC NAND driver, which
 183                  * will consider that a completely unreadable NAND block
 184                  * is bad, and thus should be skipped silently.
 185                  */
 186                 panic("** no mkimage signature but raw image not supported");
 187 #endif
 188
 189 #ifdef CONFIG_SPL_OS_BOOT
 190                 ulong start, end;
 191
 192                 if (!bootz_setup((ulong)header, &start, &end)) {
 193                         spl_image->name = "Linux";
 194                         spl_image->os = IH_OS_LINUX;
 195                         spl_image->load_addr = CONFIG_SYS_LOAD_ADDR;
 196                         spl_image->entry_point = CONFIG_SYS_LOAD_ADDR;
 197                         spl_image->size = end - start;
 198                         debug("spl: payload zImage, load addr: 0x%lx size: %d\n",
 199                               spl_image->load_addr, spl_image->size);
 200                         return 0;
 201                 }
 202 #endif
 203
 204 #ifdef CONFIG_SPL_RAW_IMAGE_SUPPORT
 205                 /* Signature not found - assume u-boot.bin */
 206                 debug("mkimage signature not found - ih_magic = %x\n",
 207                         header->ih_magic);
 208                 spl_set_header_raw_uboot(spl_image);
 209 #else
 210                 /* RAW image not supported, proceed to other boot methods. */
 211                 debug("Raw boot image support not enabled, proceeding to other boot methods\n");
 212                 return -EINVAL;
 213 #endif
 214         }
 215
 216         return 0;
 217 }
 218
 219 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 220 {
 221         typedef void __noreturn (*image_entry_noargs_t)(void);
 222
 223         image_entry_noargs_t image_entry =
 224                 (image_entry_noargs_t)spl_image->entry_point;
 225
 226         debug("image entry point: 0x%lX\n", spl_image->entry_point);
 227         image_entry();
 228 }
 229
 230 static int spl_common_init(bool setup_malloc)
 231 {
 232         int ret;
 233
 234         debug("spl_early_init()\n");
 235
 236 #if CONFIG_VAL(SYS_MALLOC_F_LEN)
 237         if (setup_malloc) {
 238 #ifdef CONFIG_MALLOC_F_ADDR
 239                 gd->malloc_base = CONFIG_MALLOC_F_ADDR;
 240 #endif
 241                 gd->malloc_limit = CONFIG_VAL(SYS_MALLOC_F_LEN);
 242                 gd->malloc_ptr = 0;
 243         }
 244 #endif
 245         ret = bootstage_init(true);
 246         if (ret) {
 247                 debug("%s: Failed to set up bootstage: ret=%d\n", __func__,
 248                       ret);
 249                 return ret;
 250         }
 251         bootstage_mark_name(BOOTSTAGE_ID_START_SPL, "spl");
 252         if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
 253                 ret = fdtdec_setup();
 254                 if (ret) {
 255                         debug("fdtdec_setup() returned error %d\n", ret);
 256                         return ret;
 257                 }
 258         }
 259         if (CONFIG_IS_ENABLED(DM)) {
 260                 bootstage_start(BOOTSTATE_ID_ACCUM_DM_SPL, "dm_spl");
 261                 /* With CONFIG_SPL_OF_PLATDATA, bring in all devices */
 262                 ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
 263                 bootstage_accum(BOOTSTATE_ID_ACCUM_DM_SPL);
 264                 if (ret) {
 265                         debug("dm_init_and_scan() returned error %d\n", ret);
 266                         return ret;
 267                 }
 268         }
 269
 270         return 0;
 271 }
 272
 273 void spl_set_bd(void)
 274 {
 275         if (!gd->bd)
 276                 gd->bd = &bdata;
 277 }
 278
 279 int spl_early_init(void)
 280 {
 281         int ret;
 282
 283         ret = spl_common_init(true);
 284         if (ret)
 285                 return ret;
 286         gd->flags |= GD_FLG_SPL_EARLY_INIT;
 287
 288         return 0;
 289 }
 290
 291 int spl_init(void)
 292 {
 293         int ret;
 294         bool setup_malloc = !(IS_ENABLED(CONFIG_SPL_STACK_R) &&
 295                         IS_ENABLED(CONFIG_SPL_SYS_MALLOC_SIMPLE));
 296
 297         if (!(gd->flags & GD_FLG_SPL_EARLY_INIT)) {
 298                 ret = spl_common_init(setup_malloc);
 299                 if (ret)
 300                         return ret;
 301         }
 302         gd->flags |= GD_FLG_SPL_INIT;
 303
 304         return 0;
 305 }
 306
 307 #ifndef BOOT_DEVICE_NONE
 308 #define BOOT_DEVICE_NONE 0xdeadbeef
 309 #endif
 310
 311 __weak void board_boot_order(u32 *spl_boot_list)
 312 {
 313         spl_boot_list[0] = spl_boot_device();
 314 }
 315
 316 static struct spl_image_loader *spl_ll_find_loader(uint boot_device)
 317 {
 318         struct spl_image_loader *drv =
 319                 ll_entry_start(struct spl_image_loader, spl_image_loader);
 320         const int n_ents =
 321                 ll_entry_count(struct spl_image_loader, spl_image_loader);
 322         struct spl_image_loader *entry;
 323
 324         for (entry = drv; entry != drv + n_ents; entry++) {
 325                 if (boot_device == entry->boot_device)
 326                         return entry;
 327         }
 328
 329         /* Not found */
 330         return NULL;
 331 }
 332
 333 static int spl_load_image(struct spl_image_info *spl_image,
 334                           struct spl_image_loader *loader)
 335 {
 336         struct spl_boot_device bootdev;
 337
 338         bootdev.boot_device = loader->boot_device;
 339         bootdev.boot_device_name = NULL;
 340
 341         return loader->load_image(spl_image, &bootdev);
 342 }
 343
 344 /**
 345  * boot_from_devices() - Try loading an booting U-Boot from a list of devices
 346  *
 347  * @spl_image: Place to put the image details if successful
 348  * @spl_boot_list: List of boot devices to try
 349  * @count: Number of elements in spl_boot_list
 350  * @return 0 if OK, -ve on error
 351  */
 352 static int boot_from_devices(struct spl_image_info *spl_image,
 353                              u32 spl_boot_list[], int count)
 354 {
 355         int i;
 356
 357         for (i = 0; i < count && spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
 358                 struct spl_image_loader *loader;
 359
 360                 loader = spl_ll_find_loader(spl_boot_list[i]);
 361 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 362                 if (loader)
 363                         printf("Trying to boot from %s\n", loader->name);
 364                 else
 365                         puts("SPL: Unsupported Boot Device!\n");
 366 #endif
 367                 if (loader && !spl_load_image(spl_image, loader))
 368                         return 0;
 369         }
 370
 371         return -ENODEV;
 372 }
 373
 374 void board_init_r(gd_t *dummy1, ulong dummy2)
 375 {
 376         u32 spl_boot_list[] = {
 377                 BOOT_DEVICE_NONE,
 378                 BOOT_DEVICE_NONE,
 379                 BOOT_DEVICE_NONE,
 380                 BOOT_DEVICE_NONE,
 381                 BOOT_DEVICE_NONE,
 382         };
 383         struct spl_image_info spl_image;
 384
 385         debug(">>spl:board_init_r()\n");
 386
 387         spl_set_bd();
 388
 389 #ifdef CONFIG_SPL_OS_BOOT
 390         dram_init_banksize();
 391 #endif
 392
 393 #if defined(CONFIG_SYS_SPL_MALLOC_START)
 394         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 395                         CONFIG_SYS_SPL_MALLOC_SIZE);
 396         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 397 #endif
 398         if (!(gd->flags & GD_FLG_SPL_INIT)) {
 399                 if (spl_init())
 400                         hang();
 401         }
 402 #if !defined(CONFIG_PPC) && !defined(CONFIG_ARCH_MX6)
 403         /*
 404          * timer_init() does not exist on PPC systems. The timer is initialized
 405          * and enabled (decrementer) in interrupt_init() here.
 406          */
 407         timer_init();
 408 #endif
 409
 410 #if CONFIG_IS_ENABLED(BOARD_INIT)
 411         spl_board_init();
 412 #endif
 413
 414         memset(&spl_image, '\0', sizeof(spl_image));
 415 #ifdef CONFIG_SYS_SPL_ARGS_ADDR
 416         spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
 417 #endif
 418         board_boot_order(spl_boot_list);
 419
 420         if (boot_from_devices(&spl_image, spl_boot_list,
 421                               ARRAY_SIZE(spl_boot_list))) {
 422                 puts("SPL: failed to boot from all boot devices\n");
 423                 hang();
 424         }
 425
 426 #ifdef CONFIG_CPU_V7M
 427         spl_image.entry_point |= 0x1;
 428 #endif
 429         switch (spl_image.os) {
 430         case IH_OS_U_BOOT:
 431                 debug("Jumping to U-Boot\n");
 432                 break;
 433 #if CONFIG_IS_ENABLED(ATF)
 434         case IH_OS_ARM_TRUSTED_FIRMWARE:
 435                 debug("Jumping to U-Boot via ARM Trusted Firmware\n");
 436                 spl_invoke_atf(&spl_image);
 437                 break;
 438 #endif
 439 #ifdef CONFIG_SPL_OS_BOOT
 440         case IH_OS_LINUX:
 441                 debug("Jumping to Linux\n");
 442                 spl_fixup_fdt();
 443                 spl_board_prepare_for_linux();
 444                 jump_to_image_linux(&spl_image);
 445 #endif
 446         default:
 447                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 448         }
 449 #if CONFIG_VAL(SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 450         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
 451               gd->malloc_ptr / 1024);
 452 #endif
 453 #ifdef CONFIG_BOOTSTAGE_STASH
 454         int ret;
 455
 456         bootstage_mark_name(BOOTSTAGE_ID_END_SPL, "end_spl");
 457         ret = bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
 458                               CONFIG_BOOTSTAGE_STASH_SIZE);
 459         if (ret)
 460                 debug("Failed to stash bootstage: err=%d\n", ret);
 461 #endif
 462
 463         debug("loaded - jumping to U-Boot...\n");
 464         spl_board_prepare_for_boot();
 465         jump_to_image_no_args(&spl_image);
 466 }
 467
 468 /*
 469  * This requires UART clocks to be enabled.  In order for this to work the
 470  * caller must ensure that the gd pointer is valid.
 471  */
 472 void preloader_console_init(void)
 473 {
 474         gd->baudrate = CONFIG_BAUDRATE;
 475
 476         serial_init();          /* serial communications setup */
 477
 478         gd->have_console = 1;
 479
 480         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 481                         U_BOOT_TIME ")\n");
 482 #ifdef CONFIG_SPL_DISPLAY_PRINT
 483         spl_display_print();
 484 #endif
 485 }
 486
 487 /**
 488  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 489  *
 490  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 491  * for the main board_init_r() execution. This is typically because we need
 492  * more stack space for things like the MMC sub-system.
 493  *
 494  * This function calculates the stack position, copies the global_data into
 495  * place, sets the new gd (except for ARM, for which setting GD within a C
 496  * function may not always work) and returns the new stack position. The
 497  * caller is responsible for setting up the sp register and, in the case
 498  * of ARM, setting up gd.
 499  *
 500  * All of this is done using the same layout and alignments as done in
 501  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
 502  *
 503  * @return new stack location, or 0 to use the same stack
 504  */
 505 ulong spl_relocate_stack_gd(void)
 506 {
 507 #ifdef CONFIG_SPL_STACK_R
 508         gd_t *new_gd;
 509         ulong ptr = CONFIG_SPL_STACK_R_ADDR;
 510
 511 #if defined(CONFIG_SPL_SYS_MALLOC_SIMPLE) && CONFIG_VAL(SYS_MALLOC_F_LEN)
 512         if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
 513                 ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 514                 gd->malloc_base = ptr;
 515                 gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 516                 gd->malloc_ptr = 0;
 517         }
 518 #endif
 519         /* Get stack position: use 8-byte alignment for ABI compliance */
 520         ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
 521         new_gd = (gd_t *)ptr;
 522         memcpy(new_gd, (void *)gd, sizeof(gd_t));
 523 #if CONFIG_IS_ENABLED(DM)
 524         dm_fixup_for_gd_move(new_gd);
 525 #endif
 526 #if !defined(CONFIG_ARM)
 527         gd = new_gd;
 528 #endif
 529         return ptr;
 530 #else
 531         return 0;
 532 #endif
 533 }