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 <i2c.h>
  17 #include <image.h>
  18 #include <malloc.h>
  19 #include <dm/root.h>
  20 #include <linux/compiler.h>
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 #ifndef CONFIG_SYS_UBOOT_START
  25 #define CONFIG_SYS_UBOOT_START  CONFIG_SYS_TEXT_BASE
  26 #endif
  27 #ifndef CONFIG_SYS_MONITOR_LEN
  28 /* Unknown U-Boot size, let's assume it will not be more than 200 KB */
  29 #define CONFIG_SYS_MONITOR_LEN  (200 * 1024)
  30 #endif
  31
  32 u32 *boot_params_ptr = NULL;
  33 struct spl_image_info spl_image;
  34
  35 /* Define board data structure */
  36 static bd_t bdata __attribute__ ((section(".data")));
  37
  38 /*
  39  * Board-specific Platform code can reimplement show_boot_progress () if needed
  40  */
  41 __weak void show_boot_progress(int val) {}
  42
  43 /*
  44  * Default function to determine if u-boot or the OS should
  45  * be started. This implementation always returns 1.
  46  *
  47  * Please implement your own board specific funcion to do this.
  48  *
  49  * RETURN
  50  * 0 to not start u-boot
  51  * positive if u-boot should start
  52  */
  53 #ifdef CONFIG_SPL_OS_BOOT
  54 __weak int spl_start_uboot(void)
  55 {
  56         puts("SPL: Please implement spl_start_uboot() for your board\n");
  57         puts("SPL: Direct Linux boot not active!\n");
  58         return 1;
  59 }
  60 #endif
  61
  62 /*
  63  * Weak default function for board specific cleanup/preparation before
  64  * Linux boot. Some boards/platforms might not need it, so just provide
  65  * an empty stub here.
  66  */
  67 __weak void spl_board_prepare_for_linux(void)
  68 {
  69         /* Nothing to do! */
  70 }
  71
  72 __weak void spl_board_prepare_for_boot(void)
  73 {
  74         /* Nothing to do! */
  75 }
  76
  77 void spl_set_header_raw_uboot(void)
  78 {
  79         spl_image.size = CONFIG_SYS_MONITOR_LEN;
  80         spl_image.entry_point = CONFIG_SYS_UBOOT_START;
  81         spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
  82         spl_image.os = IH_OS_U_BOOT;
  83         spl_image.name = "U-Boot";
  84 }
  85
  86 int spl_parse_image_header(const struct image_header *header)
  87 {
  88         u32 header_size = sizeof(struct image_header);
  89
  90         if (image_get_magic(header) == IH_MAGIC) {
  91                 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) {
  92                         /*
  93                          * On some system (e.g. powerpc), the load-address and
  94                          * entry-point is located at address 0. We can't load
  95                          * to 0-0x40. So skip header in this case.
  96                          */
  97                         spl_image.load_addr = image_get_load(header);
  98                         spl_image.entry_point = image_get_ep(header);
  99                         spl_image.size = image_get_data_size(header);
 100                 } else {
 101                         spl_image.entry_point = image_get_load(header);
 102                         /* Load including the header */
 103                         spl_image.load_addr = spl_image.entry_point -
 104                                 header_size;
 105                         spl_image.size = image_get_data_size(header) +
 106                                 header_size;
 107                 }
 108                 spl_image.os = image_get_os(header);
 109                 spl_image.name = image_get_name(header);
 110                 debug("spl: payload image: %.*s load addr: 0x%x size: %d\n",
 111                         (int)sizeof(spl_image.name), spl_image.name,
 112                         spl_image.load_addr, spl_image.size);
 113         } else {
 114 #ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
 115                 /*
 116                  * CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
 117                  * code which loads images in SPL cannot guarantee that
 118                  * absolutely all read errors will be reported.
 119                  * An example is the LPC32XX MLC NAND driver, which
 120                  * will consider that a completely unreadable NAND block
 121                  * is bad, and thus should be skipped silently.
 122                  */
 123                 panic("** no mkimage signature but raw image not supported");
 124 #elif defined(CONFIG_SPL_ABORT_ON_RAW_IMAGE)
 125                 /* Signature not found, proceed to other boot methods. */
 126                 return -EINVAL;
 127 #else
 128                 /* Signature not found - assume u-boot.bin */
 129                 debug("mkimage signature not found - ih_magic = %x\n",
 130                         header->ih_magic);
 131                 spl_set_header_raw_uboot();
 132 #endif
 133         }
 134         return 0;
 135 }
 136
 137 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 138 {
 139         typedef void __noreturn (*image_entry_noargs_t)(void);
 140
 141         image_entry_noargs_t image_entry =
 142                 (image_entry_noargs_t)(unsigned long)spl_image->entry_point;
 143
 144         debug("image entry point: 0x%X\n", spl_image->entry_point);
 145         image_entry();
 146 }
 147
 148 #ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
 149 # define CONFIG_SPL_LOAD_FIT_ADDRESS    0
 150 #endif
 151
 152 #ifdef CONFIG_SPL_RAM_DEVICE
 153 static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
 154                                ulong count, void *buf)
 155 {
 156         debug("%s: sector %lx, count %lx, buf %lx\n",
 157               __func__, sector, count, (ulong)buf);
 158         memcpy(buf, (void *)(CONFIG_SPL_LOAD_FIT_ADDRESS + sector), count);
 159         return count;
 160 }
 161
 162 static int spl_ram_load_image(void)
 163 {
 164         struct image_header *header;
 165
 166         header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
 167
 168         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
 169             image_get_magic(header) == FDT_MAGIC) {
 170                 struct spl_load_info load;
 171
 172                 debug("Found FIT\n");
 173                 load.bl_len = 1;
 174                 load.read = spl_ram_load_read;
 175                 spl_load_simple_fit(&load, 0, header);
 176         } else {
 177                 debug("Legacy image\n");
 178                 /*
 179                  * Get the header.  It will point to an address defined by
 180                  * handoff which will tell where the image located inside
 181                  * the flash. For now, it will temporary fixed to address
 182                  * pointed by U-Boot.
 183                  */
 184                 header = (struct image_header *)
 185                         (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
 186
 187                 spl_parse_image_header(header);
 188         }
 189
 190         return 0;
 191 }
 192 #endif
 193
 194 int spl_init(void)
 195 {
 196         int ret;
 197
 198         debug("spl_init()\n");
 199 #if defined(CONFIG_SYS_MALLOC_F_LEN)
 200 #ifdef CONFIG_MALLOC_F_ADDR
 201         gd->malloc_base = CONFIG_MALLOC_F_ADDR;
 202 #endif
 203         gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
 204         gd->malloc_ptr = 0;
 205 #endif
 206         if (CONFIG_IS_ENABLED(OF_CONTROL)) {
 207                 ret = fdtdec_setup();
 208                 if (ret) {
 209                         debug("fdtdec_setup() returned error %d\n", ret);
 210                         return ret;
 211                 }
 212         }
 213         if (IS_ENABLED(CONFIG_SPL_DM)) {
 214                 ret = dm_init_and_scan(true);
 215                 if (ret) {
 216                         debug("dm_init_and_scan() returned error %d\n", ret);
 217                         return ret;
 218                 }
 219         }
 220         gd->flags |= GD_FLG_SPL_INIT;
 221
 222         return 0;
 223 }
 224
 225 #ifndef BOOT_DEVICE_NONE
 226 #define BOOT_DEVICE_NONE 0xdeadbeef
 227 #endif
 228
 229 static u32 spl_boot_list[] = {
 230         BOOT_DEVICE_NONE,
 231         BOOT_DEVICE_NONE,
 232         BOOT_DEVICE_NONE,
 233         BOOT_DEVICE_NONE,
 234         BOOT_DEVICE_NONE,
 235 };
 236
 237 __weak void board_boot_order(u32 *spl_boot_list)
 238 {
 239         spl_boot_list[0] = spl_boot_device();
 240 }
 241
 242 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 243 __weak void spl_board_announce_boot_device(void) { }
 244 #endif
 245
 246 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 247 struct boot_device_name {
 248         u32 boot_dev;
 249         const char *name;
 250 };
 251
 252 struct boot_device_name boot_name_table[] = {
 253 #ifdef CONFIG_SPL_RAM_DEVICE
 254         { BOOT_DEVICE_RAM, "RAM" },
 255 #endif
 256 #ifdef CONFIG_SPL_MMC_SUPPORT
 257         { BOOT_DEVICE_MMC1, "MMC1" },
 258         { BOOT_DEVICE_MMC2, "MMC2" },
 259         { BOOT_DEVICE_MMC2_2, "MMC2_2" },
 260 #endif
 261 #ifdef CONFIG_SPL_NAND_SUPPORT
 262         { BOOT_DEVICE_NAND, "NAND" },
 263 #endif
 264 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 265         { BOOT_DEVICE_ONENAND, "OneNAND" },
 266 #endif
 267 #ifdef CONFIG_SPL_NOR_SUPPORT
 268         { BOOT_DEVICE_NOR, "NOR" },
 269 #endif
 270 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 271         { BOOT_DEVICE_UART, "UART" },
 272 #endif
 273 #ifdef CONFIG_SPL_SPI_SUPPORT
 274         { BOOT_DEVICE_SPI, "SPI" },
 275 #endif
 276 #ifdef CONFIG_SPL_ETH_SUPPORT
 277 #ifdef CONFIG_SPL_ETH_DEVICE
 278         { BOOT_DEVICE_CPGMAC, "eth device" },
 279 #else
 280         { BOOT_DEVICE_CPGMAC, "net" },
 281 #endif
 282 #endif
 283 #ifdef CONFIG_SPL_USBETH_SUPPORT
 284         { BOOT_DEVICE_USBETH, "USB eth" },
 285 #endif
 286 #ifdef CONFIG_SPL_USB_SUPPORT
 287         { BOOT_DEVICE_USB, "USB" },
 288 #endif
 289 #ifdef CONFIG_SPL_SATA_SUPPORT
 290         { BOOT_DEVICE_SATA, "SATA" },
 291 #endif
 292         /* Keep this entry last */
 293         { BOOT_DEVICE_NONE, "unknown boot device" },
 294 };
 295
 296 static void announce_boot_device(u32 boot_device)
 297 {
 298         int i;
 299
 300         puts("Trying to boot from ");
 301
 302 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 303         if (boot_device == BOOT_DEVICE_BOARD) {
 304                 spl_board_announce_boot_device();
 305                 puts("\n");
 306                 return;
 307         }
 308 #endif
 309         for (i = 0; i < ARRAY_SIZE(boot_name_table) - 1; i++) {
 310                 if (boot_name_table[i].boot_dev == boot_device)
 311                         break;
 312         }
 313
 314         printf("%s\n", boot_name_table[i].name);
 315 }
 316 #else
 317 static inline void announce_boot_device(u32 boot_device) { }
 318 #endif
 319
 320 static int spl_load_image(u32 boot_device)
 321 {
 322         switch (boot_device) {
 323 #ifdef CONFIG_SPL_RAM_DEVICE
 324         case BOOT_DEVICE_RAM:
 325                 return spl_ram_load_image();
 326 #endif
 327 #ifdef CONFIG_SPL_MMC_SUPPORT
 328         case BOOT_DEVICE_MMC1:
 329         case BOOT_DEVICE_MMC2:
 330         case BOOT_DEVICE_MMC2_2:
 331                 return spl_mmc_load_image(boot_device);
 332 #endif
 333 #ifdef CONFIG_SPL_NAND_SUPPORT
 334         case BOOT_DEVICE_NAND:
 335                 return spl_nand_load_image();
 336 #endif
 337 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 338         case BOOT_DEVICE_ONENAND:
 339                 return spl_onenand_load_image();
 340 #endif
 341 #ifdef CONFIG_SPL_NOR_SUPPORT
 342         case BOOT_DEVICE_NOR:
 343                 return spl_nor_load_image();
 344 #endif
 345 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 346         case BOOT_DEVICE_UART:
 347                 return spl_ymodem_load_image();
 348 #endif
 349 #ifdef CONFIG_SPL_SPI_SUPPORT
 350         case BOOT_DEVICE_SPI:
 351                 return spl_spi_load_image();
 352 #endif
 353 #ifdef CONFIG_SPL_ETH_SUPPORT
 354         case BOOT_DEVICE_CPGMAC:
 355 #ifdef CONFIG_SPL_ETH_DEVICE
 356                 return spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
 357 #else
 358                 return spl_net_load_image(NULL);
 359 #endif
 360 #endif
 361 #ifdef CONFIG_SPL_USBETH_SUPPORT
 362         case BOOT_DEVICE_USBETH:
 363                 return spl_net_load_image("usb_ether");
 364 #endif
 365 #ifdef CONFIG_SPL_USB_SUPPORT
 366         case BOOT_DEVICE_USB:
 367                 return spl_usb_load_image();
 368 #endif
 369 #ifdef CONFIG_SPL_SATA_SUPPORT
 370         case BOOT_DEVICE_SATA:
 371                 return spl_sata_load_image();
 372 #endif
 373 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 374         case BOOT_DEVICE_BOARD:
 375                 return spl_board_load_image();
 376 #endif
 377         default:
 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         return -EINVAL;
 385 }
 386
 387 void board_init_r(gd_t *dummy1, ulong dummy2)
 388 {
 389         int i;
 390
 391         debug(">>spl:board_init_r()\n");
 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 #ifndef CONFIG_PPC
 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 #ifdef CONFIG_SPL_BOARD_INIT
 411         spl_board_init();
 412 #endif
 413
 414         board_boot_order(spl_boot_list);
 415         for (i = 0; i < ARRAY_SIZE(spl_boot_list) &&
 416                         spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
 417                 announce_boot_device(spl_boot_list[i]);
 418                 if (!spl_load_image(spl_boot_list[i]))
 419                         break;
 420         }
 421
 422         if (i == ARRAY_SIZE(spl_boot_list) ||
 423             spl_boot_list[i] == BOOT_DEVICE_NONE) {
 424                 puts("SPL: failed to boot from all boot devices\n");
 425                 hang();
 426         }
 427
 428         switch (spl_image.os) {
 429         case IH_OS_U_BOOT:
 430                 debug("Jumping to U-Boot\n");
 431                 break;
 432 #ifdef CONFIG_SPL_OS_BOOT
 433         case IH_OS_LINUX:
 434                 debug("Jumping to Linux\n");
 435                 spl_board_prepare_for_linux();
 436                 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
 437 #endif
 438         default:
 439                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 440         }
 441 #if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 442         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
 443               gd->malloc_ptr / 1024);
 444 #endif
 445
 446         debug("loaded - jumping to U-Boot...");
 447         spl_board_prepare_for_boot();
 448         jump_to_image_no_args(&spl_image);
 449 }
 450
 451 /*
 452  * This requires UART clocks to be enabled.  In order for this to work the
 453  * caller must ensure that the gd pointer is valid.
 454  */
 455 void preloader_console_init(void)
 456 {
 457         gd->bd = &bdata;
 458         gd->baudrate = CONFIG_BAUDRATE;
 459
 460         serial_init();          /* serial communications setup */
 461
 462         gd->have_console = 1;
 463
 464         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 465                         U_BOOT_TIME ")\n");
 466 #ifdef CONFIG_SPL_DISPLAY_PRINT
 467         spl_display_print();
 468 #endif
 469 }
 470
 471 /**
 472  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 473  *
 474  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 475  * for the main board_init_r() execution. This is typically because we need
 476  * more stack space for things like the MMC sub-system.
 477  *
 478  * This function calculates the stack position, copies the global_data into
 479  * place, sets the new gd (except for ARM, for which setting GD within a C
 480  * function may not always work) and returns the new stack position. The
 481  * caller is responsible for setting up the sp register and, in the case
 482  * of ARM, setting up gd.
 483  *
 484  * All of this is done using the same layout and alignments as done in
 485  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
 486  *
 487  * @return new stack location, or 0 to use the same stack
 488  */
 489 ulong spl_relocate_stack_gd(void)
 490 {
 491 #ifdef CONFIG_SPL_STACK_R
 492         gd_t *new_gd;
 493         ulong ptr = CONFIG_SPL_STACK_R_ADDR;
 494
 495 #ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
 496         if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
 497                 ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 498                 gd->malloc_base = ptr;
 499                 gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 500                 gd->malloc_ptr = 0;
 501         }
 502 #endif
 503         /* Get stack position: use 8-byte alignment for ABI compliance */
 504         ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
 505         new_gd = (gd_t *)ptr;
 506         memcpy(new_gd, (void *)gd, sizeof(gd_t));
 507 #if !defined(CONFIG_ARM)
 508         gd = new_gd;
 509 #endif
 510         return ptr;
 511 #else
 512         return 0;
 513 #endif
 514 }