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 #if defined(CONFIG_SPL_RAM_DEVICE)
 224 SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
 225 #endif
 226 #if defined(CONFIG_SPL_DFU_SUPPORT)
 227 SPL_LOAD_IMAGE_METHOD("USB DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
 228 #endif
 229 #endif
 230
 231 int spl_init(void)
 232 {
 233         int ret;
 234
 235         debug("spl_init()\n");
 236 #if defined(CONFIG_SYS_MALLOC_F_LEN)
 237 #ifdef CONFIG_MALLOC_F_ADDR
 238         gd->malloc_base = CONFIG_MALLOC_F_ADDR;
 239 #endif
 240         gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
 241         gd->malloc_ptr = 0;
 242 #endif
 243         if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
 244                 ret = fdtdec_setup();
 245                 if (ret) {
 246                         debug("fdtdec_setup() returned error %d\n", ret);
 247                         return ret;
 248                 }
 249         }
 250         if (IS_ENABLED(CONFIG_SPL_DM)) {
 251                 /* With CONFIG_OF_PLATDATA, bring in all devices */
 252                 ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
 253                 if (ret) {
 254                         debug("dm_init_and_scan() returned error %d\n", ret);
 255                         return ret;
 256                 }
 257         }
 258         gd->flags |= GD_FLG_SPL_INIT;
 259
 260         return 0;
 261 }
 262
 263 #ifndef BOOT_DEVICE_NONE
 264 #define BOOT_DEVICE_NONE 0xdeadbeef
 265 #endif
 266
 267 __weak void board_boot_order(u32 *spl_boot_list)
 268 {
 269         spl_boot_list[0] = spl_boot_device();
 270 }
 271
 272 static struct spl_image_loader *spl_ll_find_loader(uint boot_device)
 273 {
 274         struct spl_image_loader *drv =
 275                 ll_entry_start(struct spl_image_loader, spl_image_loader);
 276         const int n_ents =
 277                 ll_entry_count(struct spl_image_loader, spl_image_loader);
 278         struct spl_image_loader *entry;
 279
 280         for (entry = drv; entry != drv + n_ents; entry++) {
 281                 if (boot_device == entry->boot_device)
 282                         return entry;
 283         }
 284
 285         /* Not found */
 286         return NULL;
 287 }
 288
 289 static int spl_load_image(struct spl_image_info *spl_image,
 290                           struct spl_image_loader *loader)
 291 {
 292         struct spl_boot_device bootdev;
 293
 294         bootdev.boot_device = loader->boot_device;
 295         bootdev.boot_device_name = NULL;
 296
 297         return loader->load_image(spl_image, &bootdev);
 298 }
 299
 300 /**
 301  * boot_from_devices() - Try loading an booting U-Boot from a list of devices
 302  *
 303  * @spl_image: Place to put the image details if successful
 304  * @spl_boot_list: List of boot devices to try
 305  * @count: Number of elements in spl_boot_list
 306  * @return 0 if OK, -ve on error
 307  */
 308 static int boot_from_devices(struct spl_image_info *spl_image,
 309                              u32 spl_boot_list[], int count)
 310 {
 311         int i;
 312
 313         for (i = 0; i < count && spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
 314                 struct spl_image_loader *loader;
 315
 316                 loader = spl_ll_find_loader(spl_boot_list[i]);
 317 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 318                 if (loader)
 319                         printf("Trying to boot from %s", loader->name);
 320                 else
 321                         puts("SPL: Unsupported Boot Device!\n");
 322 #endif
 323                 if (loader && !spl_load_image(spl_image, loader))
 324                         return 0;
 325         }
 326
 327         return -ENODEV;
 328 }
 329
 330 void board_init_r(gd_t *dummy1, ulong dummy2)
 331 {
 332         u32 spl_boot_list[] = {
 333                 BOOT_DEVICE_NONE,
 334                 BOOT_DEVICE_NONE,
 335                 BOOT_DEVICE_NONE,
 336                 BOOT_DEVICE_NONE,
 337                 BOOT_DEVICE_NONE,
 338         };
 339         struct spl_image_info spl_image;
 340
 341         debug(">>spl:board_init_r()\n");
 342
 343 #if defined(CONFIG_SYS_SPL_MALLOC_START)
 344         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 345                         CONFIG_SYS_SPL_MALLOC_SIZE);
 346         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 347 #endif
 348         if (!(gd->flags & GD_FLG_SPL_INIT)) {
 349                 if (spl_init())
 350                         hang();
 351         }
 352 #ifndef CONFIG_PPC
 353         /*
 354          * timer_init() does not exist on PPC systems. The timer is initialized
 355          * and enabled (decrementer) in interrupt_init() here.
 356          */
 357         timer_init();
 358 #endif
 359
 360 #ifdef CONFIG_SPL_BOARD_INIT
 361         spl_board_init();
 362 #endif
 363
 364         memset(&spl_image, '\0', sizeof(spl_image));
 365         board_boot_order(spl_boot_list);
 366
 367         if (boot_from_devices(&spl_image, spl_boot_list,
 368                               ARRAY_SIZE(spl_boot_list))) {
 369                 puts("SPL: failed to boot from all boot devices\n");
 370                 hang();
 371         }
 372
 373         switch (spl_image.os) {
 374         case IH_OS_U_BOOT:
 375                 debug("Jumping to U-Boot\n");
 376                 break;
 377 #ifdef CONFIG_SPL_OS_BOOT
 378         case IH_OS_LINUX:
 379                 debug("Jumping to Linux\n");
 380                 spl_board_prepare_for_linux();
 381                 jump_to_image_linux(&spl_image,
 382                                     (void *)CONFIG_SYS_SPL_ARGS_ADDR);
 383 #endif
 384         default:
 385                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 386         }
 387 #if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 388         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
 389               gd->malloc_ptr / 1024);
 390 #endif
 391
 392         debug("loaded - jumping to U-Boot...");
 393         spl_board_prepare_for_boot();
 394         jump_to_image_no_args(&spl_image);
 395 }
 396
 397 /*
 398  * This requires UART clocks to be enabled.  In order for this to work the
 399  * caller must ensure that the gd pointer is valid.
 400  */
 401 void preloader_console_init(void)
 402 {
 403         gd->bd = &bdata;
 404         gd->baudrate = CONFIG_BAUDRATE;
 405
 406         serial_init();          /* serial communications setup */
 407
 408         gd->have_console = 1;
 409
 410         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 411                         U_BOOT_TIME ")\n");
 412 #ifdef CONFIG_SPL_DISPLAY_PRINT
 413         spl_display_print();
 414 #endif
 415 }
 416
 417 /**
 418  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 419  *
 420  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 421  * for the main board_init_r() execution. This is typically because we need
 422  * more stack space for things like the MMC sub-system.
 423  *
 424  * This function calculates the stack position, copies the global_data into
 425  * place, sets the new gd (except for ARM, for which setting GD within a C
 426  * function may not always work) and returns the new stack position. The
 427  * caller is responsible for setting up the sp register and, in the case
 428  * of ARM, setting up gd.
 429  *
 430  * All of this is done using the same layout and alignments as done in
 431  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
 432  *
 433  * @return new stack location, or 0 to use the same stack
 434  */
 435 ulong spl_relocate_stack_gd(void)
 436 {
 437 #ifdef CONFIG_SPL_STACK_R
 438         gd_t *new_gd;
 439         ulong ptr = CONFIG_SPL_STACK_R_ADDR;
 440
 441 #ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
 442         if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
 443                 ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 444                 gd->malloc_base = ptr;
 445                 gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 446                 gd->malloc_ptr = 0;
 447         }
 448 #endif
 449         /* Get stack position: use 8-byte alignment for ABI compliance */
 450         ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
 451         new_gd = (gd_t *)ptr;
 452         memcpy(new_gd, (void *)gd, sizeof(gd_t));
 453 #if CONFIG_IS_ENABLED(DM)
 454         dm_fixup_for_gd_move(new_gd);
 455 #endif
 456 #if !defined(CONFIG_ARM)
 457         gd = new_gd;
 458 #endif
 459         return ptr;
 460 #else
 461         return 0;
 462 #endif
 463 }