git.sur5r.net Git - u-boot/blob - 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 #include <common.h>
  10 #include <dm.h>
  11 #include <spl.h>
  12 #include <asm/u-boot.h>
  13 #include <nand.h>
  14 #include <fat.h>
  15 #include <version.h>
  16 #include <image.h>
  17 #include <malloc.h>
  18 #include <dm/root.h>
  19 #include <linux/compiler.h>
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 #ifndef CONFIG_SYS_UBOOT_START
  24 #define CONFIG_SYS_UBOOT_START  CONFIG_SYS_TEXT_BASE
  25 #endif
  26 #ifndef CONFIG_SYS_MONITOR_LEN
  27 /* Unknown U-Boot size, let's assume it will not be more than 200 KB */
  28 #define CONFIG_SYS_MONITOR_LEN  (200 * 1024)
  29 #endif
  30
  31 u32 *boot_params_ptr = NULL;
  32
  33 /* Define board data structure */
  34 static bd_t bdata __attribute__ ((section(".data")));
  35
  36 /*
  37  * Board-specific Platform code can reimplement show_boot_progress () if needed
  38  */
  39 __weak void show_boot_progress(int val) {}
  40
  41 /*
  42  * Default function to determine if u-boot or the OS should
  43  * be started. This implementation always returns 1.
  44  *
  45  * Please implement your own board specific funcion to do this.
  46  *
  47  * RETURN
  48  * 0 to not start u-boot
  49  * positive if u-boot should start
  50  */
  51 #ifdef CONFIG_SPL_OS_BOOT
  52 __weak int spl_start_uboot(void)
  53 {
  54         puts("SPL: Please implement spl_start_uboot() for your board\n");
  55         puts("SPL: Direct Linux boot not active!\n");
  56         return 1;
  57 }
  58
  59 /*
  60  * Weak default function for arch specific zImage check. Return zero
  61  * and fill start and end address if image is recognized.
  62  */
  63 int __weak bootz_setup(ulong image, ulong *start, ulong *end)
  64 {
  65          return 1;
  66 }
  67 #endif
  68
  69 /*
  70  * Weak default function for board specific cleanup/preparation before
  71  * Linux boot. Some boards/platforms might not need it, so just provide
  72  * an empty stub here.
  73  */
  74 __weak void spl_board_prepare_for_linux(void)
  75 {
  76         /* Nothing to do! */
  77 }
  78
  79 __weak void spl_board_prepare_for_boot(void)
  80 {
  81         /* Nothing to do! */
  82 }
  83
  84 void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
  85 {
  86         spl_image->size = CONFIG_SYS_MONITOR_LEN;
  87         spl_image->entry_point = CONFIG_SYS_UBOOT_START;
  88         spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
  89         spl_image->os = IH_OS_U_BOOT;
  90         spl_image->name = "U-Boot";
  91 }
  92
  93 int spl_parse_image_header(struct spl_image_info *spl_image,
  94                            const struct image_header *header)
  95 {
  96         u32 header_size = sizeof(struct image_header);
  97
  98         if (image_get_magic(header) == IH_MAGIC) {
  99                 if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
 100                         /*
 101                          * On some system (e.g. powerpc), the load-address and
 102                          * entry-point is located at address 0. We can't load
 103                          * to 0-0x40. So skip header in this case.
 104                          */
 105                         spl_image->load_addr = image_get_load(header);
 106                         spl_image->entry_point = image_get_ep(header);
 107                         spl_image->size = image_get_data_size(header);
 108                 } else {
 109                         spl_image->entry_point = image_get_load(header);
 110                         /* Load including the header */
 111                         spl_image->load_addr = spl_image->entry_point -
 112                                 header_size;
 113                         spl_image->size = image_get_data_size(header) +
 114                                 header_size;
 115                 }
 116                 spl_image->os = image_get_os(header);
 117                 spl_image->name = image_get_name(header);
 118                 debug("spl: payload image: %.*s load addr: 0x%x size: %d\n",
 119                         (int)sizeof(spl_image->name), spl_image->name,
 120                         spl_image->load_addr, spl_image->size);
 121         } else {
 122 #ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
 123                 /*
 124                  * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
 125                  * code which loads images in SPL cannot guarantee that
 126                  * absolutely all read errors will be reported.
 127                  * An example is the LPC32XX MLC NAND driver, which
 128                  * will consider that a completely unreadable NAND block
 129                  * is bad, and thus should be skipped silently.
 130                  */
 131                 panic("** no mkimage signature but raw image not supported");
 132 #endif
 133
 134 #ifdef CONFIG_SPL_OS_BOOT
 135                 ulong start, end;
 136
 137                 if (!bootz_setup((ulong)header, &start, &end)) {
 138                         spl_image->name = "Linux";
 139                         spl_image->os = IH_OS_LINUX;
 140                         spl_image->load_addr = CONFIG_SYS_LOAD_ADDR;
 141                         spl_image->entry_point = CONFIG_SYS_LOAD_ADDR;
 142                         spl_image->size = end - start;
 143                         debug("spl: payload zImage, load addr: 0x%x size: %d\n",
 144                               spl_image->load_addr, spl_image->size);
 145                         return 0;
 146                 }
 147 #endif
 148
 149 #ifdef CONFIG_SPL_ABORT_ON_RAW_IMAGE
 150                 /* Signature not found, proceed to other boot methods. */
 151                 return -EINVAL;
 152 #else
 153                 /* Signature not found - assume u-boot.bin */
 154                 debug("mkimage signature not found - ih_magic = %x\n",
 155                         header->ih_magic);
 156                 spl_set_header_raw_uboot(spl_image);
 157 #endif
 158         }
 159         return 0;
 160 }
 161
 162 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 163 {
 164         typedef void __noreturn (*image_entry_noargs_t)(void);
 165
 166         image_entry_noargs_t image_entry =
 167                 (image_entry_noargs_t)(unsigned long)spl_image->entry_point;
 168
 169         debug("image entry point: 0x%X\n", spl_image->entry_point);
 170         image_entry();
 171 }
 172
 173 #ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
 174 # define CONFIG_SPL_LOAD_FIT_ADDRESS    0
 175 #endif
 176
 177 #if defined(CONFIG_SPL_RAM_DEVICE) || defined(CONFIG_SPL_DFU_SUPPORT)
 178 static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
 179                                ulong count, void *buf)
 180 {
 181         debug("%s: sector %lx, count %lx, buf %lx\n",
 182               __func__, sector, count, (ulong)buf);
 183         memcpy(buf, (void *)(CONFIG_SPL_LOAD_FIT_ADDRESS + sector), count);
 184         return count;
 185 }
 186
 187 static int spl_ram_load_image(struct spl_image_info *spl_image,
 188                               struct spl_boot_device *bootdev)
 189 {
 190         struct image_header *header;
 191
 192         header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
 193
 194 #if defined(CONFIG_SPL_DFU_SUPPORT)
 195         if (bootdev->boot_device == BOOT_DEVICE_DFU)
 196                 spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
 197 #endif
 198
 199         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
 200             image_get_magic(header) == FDT_MAGIC) {
 201                 struct spl_load_info load;
 202
 203                 debug("Found FIT\n");
 204                 load.bl_len = 1;
 205                 load.read = spl_ram_load_read;
 206                 spl_load_simple_fit(spl_image, &load, 0, header);
 207         } else {
 208                 debug("Legacy image\n");
 209                 /*
 210                  * Get the header.  It will point to an address defined by
 211                  * handoff which will tell where the image located inside
 212                  * the flash. For now, it will temporary fixed to address
 213                  * pointed by U-Boot.
 214                  */
 215                 header = (struct image_header *)
 216                         (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
 217
 218                 spl_parse_image_header(spl_image, header);
 219         }
 220
 221         return 0;
 222 }
 223 SPL_LOAD_IMAGE_METHOD(0, BOOT_DEVICE_RAM, spl_ram_load_image);
 224 #if defined(CONFIG_SPL_DFU_SUPPORT)
 225 SPL_LOAD_IMAGE_METHOD(0, BOOT_DEVICE_DFU, spl_ram_load_image);
 226 #endif
 227 #endif
 228
 229 int spl_init(void)
 230 {
 231         int ret;
 232
 233         debug("spl_init()\n");
 234 #if defined(CONFIG_SYS_MALLOC_F_LEN)
 235 #ifdef CONFIG_MALLOC_F_ADDR
 236         gd->malloc_base = CONFIG_MALLOC_F_ADDR;
 237 #endif
 238         gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
 239         gd->malloc_ptr = 0;
 240 #endif
 241         if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
 242                 ret = fdtdec_setup();
 243                 if (ret) {
 244                         debug("fdtdec_setup() returned error %d\n", ret);
 245                         return ret;
 246                 }
 247         }
 248         if (IS_ENABLED(CONFIG_SPL_DM)) {
 249                 /* With CONFIG_OF_PLATDATA, bring in all devices */
 250                 ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
 251                 if (ret) {
 252                         debug("dm_init_and_scan() returned error %d\n", ret);
 253                         return ret;
 254                 }
 255         }
 256         gd->flags |= GD_FLG_SPL_INIT;
 257
 258         return 0;
 259 }
 260
 261 #ifndef BOOT_DEVICE_NONE
 262 #define BOOT_DEVICE_NONE 0xdeadbeef
 263 #endif
 264
 265 __weak void board_boot_order(u32 *spl_boot_list)
 266 {
 267         spl_boot_list[0] = spl_boot_device();
 268 }
 269
 270 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 271 __weak void spl_board_announce_boot_device(void) { }
 272 #endif
 273
 274 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 275 struct boot_device_name {
 276         u32 boot_dev;
 277         const char *name;
 278 };
 279
 280 struct boot_device_name boot_name_table[] = {
 281 #ifdef CONFIG_SPL_RAM_DEVICE
 282         { BOOT_DEVICE_RAM, "RAM" },
 283 #endif
 284 #ifdef CONFIG_SPL_MMC_SUPPORT
 285         { BOOT_DEVICE_MMC1, "MMC1" },
 286         { BOOT_DEVICE_MMC2, "MMC2" },
 287         { BOOT_DEVICE_MMC2_2, "MMC2_2" },
 288 #endif
 289 #ifdef CONFIG_SPL_NAND_SUPPORT
 290         { BOOT_DEVICE_NAND, "NAND" },
 291 #endif
 292 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 293         { BOOT_DEVICE_ONENAND, "OneNAND" },
 294 #endif
 295 #ifdef CONFIG_SPL_NOR_SUPPORT
 296         { BOOT_DEVICE_NOR, "NOR" },
 297 #endif
 298 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 299         { BOOT_DEVICE_UART, "UART" },
 300 #endif
 301 #if defined(CONFIG_SPL_SPI_SUPPORT) || defined(CONFIG_SPL_SPI_FLASH_SUPPORT)
 302         { BOOT_DEVICE_SPI, "SPI" },
 303 #endif
 304 #ifdef CONFIG_SPL_ETH_SUPPORT
 305 #ifdef CONFIG_SPL_ETH_DEVICE
 306         { BOOT_DEVICE_CPGMAC, "eth device" },
 307 #else
 308         { BOOT_DEVICE_CPGMAC, "net" },
 309 #endif
 310 #endif
 311 #ifdef CONFIG_SPL_USBETH_SUPPORT
 312         { BOOT_DEVICE_USBETH, "USB eth" },
 313 #endif
 314 #ifdef CONFIG_SPL_USB_SUPPORT
 315         { BOOT_DEVICE_USB, "USB" },
 316 #endif
 317 #ifdef CONFIG_SPL_DFU_SUPPORT
 318         { BOOT_DEVICE_DFU, "USB DFU" },
 319 #endif
 320 #ifdef CONFIG_SPL_SATA_SUPPORT
 321         { BOOT_DEVICE_SATA, "SATA" },
 322 #endif
 323         /* Keep this entry last */
 324         { BOOT_DEVICE_NONE, "unknown boot device" },
 325 };
 326
 327 static void announce_boot_device(u32 boot_device)
 328 {
 329         int i;
 330
 331         puts("Trying to boot from ");
 332
 333 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 334         if (boot_device == BOOT_DEVICE_BOARD) {
 335                 spl_board_announce_boot_device();
 336                 puts("\n");
 337                 return;
 338         }
 339 #endif
 340         for (i = 0; i < ARRAY_SIZE(boot_name_table) - 1; i++) {
 341                 if (boot_name_table[i].boot_dev == boot_device)
 342                         break;
 343         }
 344
 345         printf("%s\n", boot_name_table[i].name);
 346 }
 347 #else
 348 static inline void announce_boot_device(u32 boot_device) { }
 349 #endif
 350
 351 static struct spl_image_loader *spl_ll_find_loader(uint boot_device)
 352 {
 353         struct spl_image_loader *drv =
 354                 ll_entry_start(struct spl_image_loader, spl_image_loader);
 355         const int n_ents =
 356                 ll_entry_count(struct spl_image_loader, spl_image_loader);
 357         struct spl_image_loader *entry;
 358
 359         for (entry = drv; entry != drv + n_ents; entry++) {
 360                 if (boot_device == entry->boot_device)
 361                         return entry;
 362         }
 363
 364         /* Not found */
 365         return NULL;
 366 }
 367
 368 static int spl_load_image(struct spl_image_info *spl_image, u32 boot_device)
 369 {
 370         struct spl_boot_device bootdev;
 371         struct spl_image_loader *loader = spl_ll_find_loader(boot_device);
 372
 373         bootdev.boot_device = boot_device;
 374         bootdev.boot_device_name = NULL;
 375         if (loader)
 376                 return loader->load_image(spl_image, &bootdev);
 377
 378 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 379         puts("SPL: Unsupported Boot Device!\n");
 380 #endif
 381         return -ENODEV;
 382 }
 383
 384 void board_init_r(gd_t *dummy1, ulong dummy2)
 385 {
 386         u32 spl_boot_list[] = {
 387                 BOOT_DEVICE_NONE,
 388                 BOOT_DEVICE_NONE,
 389                 BOOT_DEVICE_NONE,
 390                 BOOT_DEVICE_NONE,
 391                 BOOT_DEVICE_NONE,
 392         };
 393         struct spl_image_info spl_image;
 394         int i;
 395
 396         debug(">>spl:board_init_r()\n");
 397
 398 #if defined(CONFIG_SYS_SPL_MALLOC_START)
 399         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 400                         CONFIG_SYS_SPL_MALLOC_SIZE);
 401         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 402 #endif
 403         if (!(gd->flags & GD_FLG_SPL_INIT)) {
 404                 if (spl_init())
 405                         hang();
 406         }
 407 #ifndef CONFIG_PPC
 408         /*
 409          * timer_init() does not exist on PPC systems. The timer is initialized
 410          * and enabled (decrementer) in interrupt_init() here.
 411          */
 412         timer_init();
 413 #endif
 414
 415 #ifdef CONFIG_SPL_BOARD_INIT
 416         spl_board_init();
 417 #endif
 418
 419         memset(&spl_image, '\0', sizeof(spl_image));
 420         board_boot_order(spl_boot_list);
 421         for (i = 0; i < ARRAY_SIZE(spl_boot_list) &&
 422                         spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
 423                 announce_boot_device(spl_boot_list[i]);
 424                 if (!spl_load_image(&spl_image, spl_boot_list[i]))
 425                         break;
 426         }
 427
 428         if (i == ARRAY_SIZE(spl_boot_list) ||
 429             spl_boot_list[i] == BOOT_DEVICE_NONE) {
 430                 puts("SPL: failed to boot from all boot devices\n");
 431                 hang();
 432         }
 433
 434         switch (spl_image.os) {
 435         case IH_OS_U_BOOT:
 436                 debug("Jumping to U-Boot\n");
 437                 break;
 438 #ifdef CONFIG_SPL_OS_BOOT
 439         case IH_OS_LINUX:
 440                 debug("Jumping to Linux\n");
 441                 spl_board_prepare_for_linux();
 442                 jump_to_image_linux(&spl_image,
 443                                     (void *)CONFIG_SYS_SPL_ARGS_ADDR);
 444 #endif
 445         default:
 446                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 447         }
 448 #if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 449         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
 450               gd->malloc_ptr / 1024);
 451 #endif
 452
 453         debug("loaded - jumping to U-Boot...");
 454         spl_board_prepare_for_boot();
 455         jump_to_image_no_args(&spl_image);
 456 }
 457
 458 /*
 459  * This requires UART clocks to be enabled.  In order for this to work the
 460  * caller must ensure that the gd pointer is valid.
 461  */
 462 void preloader_console_init(void)
 463 {
 464         gd->bd = &bdata;
 465         gd->baudrate = CONFIG_BAUDRATE;
 466
 467         serial_init();          /* serial communications setup */
 468
 469         gd->have_console = 1;
 470
 471         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 472                         U_BOOT_TIME ")\n");
 473 #ifdef CONFIG_SPL_DISPLAY_PRINT
 474         spl_display_print();
 475 #endif
 476 }
 477
 478 /**
 479  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 480  *
 481  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 482  * for the main board_init_r() execution. This is typically because we need
 483  * more stack space for things like the MMC sub-system.
 484  *
 485  * This function calculates the stack position, copies the global_data into
 486  * place, sets the new gd (except for ARM, for which setting GD within a C
 487  * function may not always work) and returns the new stack position. The
 488  * caller is responsible for setting up the sp register and, in the case
 489  * of ARM, setting up gd.
 490  *
 491  * All of this is done using the same layout and alignments as done in
 492  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
 493  *
 494  * @return new stack location, or 0 to use the same stack
 495  */
 496 ulong spl_relocate_stack_gd(void)
 497 {
 498 #ifdef CONFIG_SPL_STACK_R
 499         gd_t *new_gd;
 500         ulong ptr = CONFIG_SPL_STACK_R_ADDR;
 501
 502 #ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
 503         if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
 504                 ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 505                 gd->malloc_base = ptr;
 506                 gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 507                 gd->malloc_ptr = 0;
 508         }
 509 #endif
 510         /* Get stack position: use 8-byte alignment for ABI compliance */
 511         ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
 512         new_gd = (gd_t *)ptr;
 513         memcpy(new_gd, (void *)gd, sizeof(gd_t));
 514 #if !defined(CONFIG_ARM)
 515         gd = new_gd;
 516 #endif
 517         return ptr;
 518 #else
 519         return 0;
 520 #endif
 521 }