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