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 #ifdef CONFIG_SPL_RAM_DEVICE
 144 static int spl_ram_load_image(void)
 145 {
 146         const struct image_header *header;
 147
 148         /*
 149          * Get the header.  It will point to an address defined by handoff
 150          * which will tell where the image located inside the flash. For
 151          * now, it will temporary fixed to address pointed by U-Boot.
 152          */
 153         header = (struct image_header *)
 154                 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
 155
 156         spl_parse_image_header(header);
 157
 158         return 0;
 159 }
 160 #endif
 161
 162 int spl_init(void)
 163 {
 164         int ret;
 165
 166         debug("spl_init()\n");
 167 #if defined(CONFIG_SYS_MALLOC_F_LEN)
 168         gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
 169         gd->malloc_ptr = 0;
 170 #endif
 171         if (CONFIG_IS_ENABLED(OF_CONTROL)) {
 172                 ret = fdtdec_setup();
 173                 if (ret) {
 174                         debug("fdtdec_setup() returned error %d\n", ret);
 175                         return ret;
 176                 }
 177         }
 178         if (IS_ENABLED(CONFIG_SPL_DM)) {
 179                 ret = dm_init_and_scan(true);
 180                 if (ret) {
 181                         debug("dm_init_and_scan() returned error %d\n", ret);
 182                         return ret;
 183                 }
 184         }
 185         gd->flags |= GD_FLG_SPL_INIT;
 186
 187         return 0;
 188 }
 189
 190 #ifndef BOOT_DEVICE_NONE
 191 #define BOOT_DEVICE_NONE 0xdeadbeef
 192 #endif
 193
 194 static u32 spl_boot_list[] = {
 195         BOOT_DEVICE_NONE,
 196         BOOT_DEVICE_NONE,
 197         BOOT_DEVICE_NONE,
 198         BOOT_DEVICE_NONE,
 199         BOOT_DEVICE_NONE,
 200 };
 201
 202 __weak void board_boot_order(u32 *spl_boot_list)
 203 {
 204         spl_boot_list[0] = spl_boot_device();
 205 }
 206
 207 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 208 __weak void spl_board_announce_boot_device(void) { }
 209 #endif
 210
 211 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 212 struct boot_device_name {
 213         u32 boot_dev;
 214         const char *name;
 215 };
 216
 217 struct boot_device_name boot_name_table[] = {
 218 #ifdef CONFIG_SPL_RAM_DEVICE
 219         { BOOT_DEVICE_RAM, "RAM" },
 220 #endif
 221 #ifdef CONFIG_SPL_MMC_SUPPORT
 222         { BOOT_DEVICE_MMC1, "MMC1" },
 223         { BOOT_DEVICE_MMC2, "MMC2" },
 224         { BOOT_DEVICE_MMC2_2, "MMC2_2" },
 225 #endif
 226 #ifdef CONFIG_SPL_NAND_SUPPORT
 227         { BOOT_DEVICE_NAND, "NAND" },
 228 #endif
 229 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 230         { BOOT_DEVICE_ONENAND, "OneNAND" },
 231 #endif
 232 #ifdef CONFIG_SPL_NOR_SUPPORT
 233         { BOOT_DEVICE_NOR, "NOR" },
 234 #endif
 235 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 236         { BOOT_DEVICE_UART, "UART" },
 237 #endif
 238 #ifdef CONFIG_SPL_SPI_SUPPORT
 239         { BOOT_DEVICE_SPI, "SPI" },
 240 #endif
 241 #ifdef CONFIG_SPL_ETH_SUPPORT
 242 #ifdef CONFIG_SPL_ETH_DEVICE
 243         { BOOT_DEVICE_CPGMAC, "eth device" },
 244 #else
 245         { BOOT_DEVICE_CPGMAC, "net" },
 246 #endif
 247 #endif
 248 #ifdef CONFIG_SPL_USBETH_SUPPORT
 249         { BOOT_DEVICE_USBETH, "USB eth" },
 250 #endif
 251 #ifdef CONFIG_SPL_USB_SUPPORT
 252         { BOOT_DEVICE_USB, "USB" },
 253 #endif
 254 #ifdef CONFIG_SPL_SATA_SUPPORT
 255         { BOOT_DEVICE_SATA, "SATA" },
 256 #endif
 257         /* Keep this entry last */
 258         { BOOT_DEVICE_NONE, "unknown boot device" },
 259 };
 260
 261 static void announce_boot_device(u32 boot_device)
 262 {
 263         int i;
 264
 265         puts("Trying to boot from ");
 266
 267 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 268         if (boot_device == BOOT_DEVICE_BOARD) {
 269                 spl_board_announce_boot_device();
 270                 puts("\n");
 271                 return;
 272         }
 273 #endif
 274         for (i = 0; i < ARRAY_SIZE(boot_name_table) - 1; i++) {
 275                 if (boot_name_table[i].boot_dev == boot_device)
 276                         break;
 277         }
 278
 279         printf("%s\n", boot_name_table[i].name);
 280 }
 281 #else
 282 static inline void announce_boot_device(u32 boot_device) { }
 283 #endif
 284
 285 static int spl_load_image(u32 boot_device)
 286 {
 287         switch (boot_device) {
 288 #ifdef CONFIG_SPL_RAM_DEVICE
 289         case BOOT_DEVICE_RAM:
 290                 return spl_ram_load_image();
 291 #endif
 292 #ifdef CONFIG_SPL_MMC_SUPPORT
 293         case BOOT_DEVICE_MMC1:
 294         case BOOT_DEVICE_MMC2:
 295         case BOOT_DEVICE_MMC2_2:
 296                 return spl_mmc_load_image(boot_device);
 297 #endif
 298 #ifdef CONFIG_SPL_NAND_SUPPORT
 299         case BOOT_DEVICE_NAND:
 300                 return spl_nand_load_image();
 301 #endif
 302 #ifdef CONFIG_SPL_ONENAND_SUPPORT
 303         case BOOT_DEVICE_ONENAND:
 304                 return spl_onenand_load_image();
 305 #endif
 306 #ifdef CONFIG_SPL_NOR_SUPPORT
 307         case BOOT_DEVICE_NOR:
 308                 return spl_nor_load_image();
 309 #endif
 310 #ifdef CONFIG_SPL_YMODEM_SUPPORT
 311         case BOOT_DEVICE_UART:
 312                 return spl_ymodem_load_image();
 313 #endif
 314 #ifdef CONFIG_SPL_SPI_SUPPORT
 315         case BOOT_DEVICE_SPI:
 316                 return spl_spi_load_image();
 317 #endif
 318 #ifdef CONFIG_SPL_ETH_SUPPORT
 319         case BOOT_DEVICE_CPGMAC:
 320 #ifdef CONFIG_SPL_ETH_DEVICE
 321                 return spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
 322 #else
 323                 return spl_net_load_image(NULL);
 324 #endif
 325 #endif
 326 #ifdef CONFIG_SPL_USBETH_SUPPORT
 327         case BOOT_DEVICE_USBETH:
 328                 return spl_net_load_image("usb_ether");
 329 #endif
 330 #ifdef CONFIG_SPL_USB_SUPPORT
 331         case BOOT_DEVICE_USB:
 332                 return spl_usb_load_image();
 333 #endif
 334 #ifdef CONFIG_SPL_SATA_SUPPORT
 335         case BOOT_DEVICE_SATA:
 336                 return spl_sata_load_image();
 337 #endif
 338 #ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
 339         case BOOT_DEVICE_BOARD:
 340                 return spl_board_load_image();
 341 #endif
 342         default:
 343 #if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 344                 puts("SPL: Unsupported Boot Device!\n");
 345 #endif
 346                 return -ENODEV;
 347         }
 348
 349         return -EINVAL;
 350 }
 351
 352 void board_init_r(gd_t *dummy1, ulong dummy2)
 353 {
 354         int i;
 355
 356         debug(">>spl:board_init_r()\n");
 357
 358 #if defined(CONFIG_SYS_SPL_MALLOC_START)
 359         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
 360                         CONFIG_SYS_SPL_MALLOC_SIZE);
 361         gd->flags |= GD_FLG_FULL_MALLOC_INIT;
 362 #endif
 363         if (!(gd->flags & GD_FLG_SPL_INIT)) {
 364                 if (spl_init())
 365                         hang();
 366         }
 367 #ifndef CONFIG_PPC
 368         /*
 369          * timer_init() does not exist on PPC systems. The timer is initialized
 370          * and enabled (decrementer) in interrupt_init() here.
 371          */
 372         timer_init();
 373 #endif
 374
 375 #ifdef CONFIG_SPL_BOARD_INIT
 376         spl_board_init();
 377 #endif
 378
 379         board_boot_order(spl_boot_list);
 380         for (i = 0; i < ARRAY_SIZE(spl_boot_list) &&
 381                         spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
 382                 announce_boot_device(spl_boot_list[i]);
 383                 if (!spl_load_image(spl_boot_list[i]))
 384                         break;
 385         }
 386
 387         if (i == ARRAY_SIZE(spl_boot_list) ||
 388             spl_boot_list[i] == BOOT_DEVICE_NONE) {
 389                 puts("SPL: failed to boot from all boot devices\n");
 390                 hang();
 391         }
 392
 393         switch (spl_image.os) {
 394         case IH_OS_U_BOOT:
 395                 debug("Jumping to U-Boot\n");
 396                 break;
 397 #ifdef CONFIG_SPL_OS_BOOT
 398         case IH_OS_LINUX:
 399                 debug("Jumping to Linux\n");
 400                 spl_board_prepare_for_linux();
 401                 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
 402 #endif
 403         default:
 404                 debug("Unsupported OS image.. Jumping nevertheless..\n");
 405         }
 406 #if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
 407         debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
 408               gd->malloc_ptr / 1024);
 409 #endif
 410
 411         debug("loaded - jumping to U-Boot...");
 412         spl_board_prepare_for_boot();
 413         jump_to_image_no_args(&spl_image);
 414 }
 415
 416 /*
 417  * This requires UART clocks to be enabled.  In order for this to work the
 418  * caller must ensure that the gd pointer is valid.
 419  */
 420 void preloader_console_init(void)
 421 {
 422         gd->bd = &bdata;
 423         gd->baudrate = CONFIG_BAUDRATE;
 424
 425         serial_init();          /* serial communications setup */
 426
 427         gd->have_console = 1;
 428
 429         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
 430                         U_BOOT_TIME ")\n");
 431 #ifdef CONFIG_SPL_DISPLAY_PRINT
 432         spl_display_print();
 433 #endif
 434 }
 435
 436 /**
 437  * spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
 438  *
 439  * Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
 440  * for the main board_init_r() execution. This is typically because we need
 441  * more stack space for things like the MMC sub-system.
 442  *
 443  * This function calculates the stack position, copies the global_data into
 444  * place, sets the new gd (except for ARM, for which setting GD within a C
 445  * function may not always work) and returns the new stack position. The
 446  * caller is responsible for setting up the sp register and, in the case
 447  * of ARM, setting up gd.
 448  *
 449  * All of this is done using the same layout and alignments as done in
 450  * board_init_f_init_reserve() / board_init_f_alloc_reserve().
 451  *
 452  * @return new stack location, or 0 to use the same stack
 453  */
 454 ulong spl_relocate_stack_gd(void)
 455 {
 456 #ifdef CONFIG_SPL_STACK_R
 457         gd_t *new_gd;
 458         ulong ptr = CONFIG_SPL_STACK_R_ADDR;
 459
 460 #ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
 461         if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
 462                 if (!(gd->flags & GD_FLG_SPL_INIT))
 463                         panic_str("spl_init must be called before heap reloc");
 464
 465                 ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 466                 gd->malloc_base = ptr;
 467                 gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 468                 gd->malloc_ptr = 0;
 469         }
 470 #endif
 471         /* Get stack position: use 8-byte alignment for ABI compliance */
 472         ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
 473         new_gd = (gd_t *)ptr;
 474         memcpy(new_gd, (void *)gd, sizeof(gd_t));
 475 #if !defined(CONFIG_ARM)
 476         gd = new_gd;
 477 #endif
 478         return ptr;
 479 #else
 480         return 0;
 481 #endif
 482 }