include/spl.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * (C) Copyright 2012
   4  * Texas Instruments, <www.ti.com>
   5  */
   6 #ifndef _SPL_H_
   7 #define _SPL_H_
   8
   9 #include <binman_sym.h>
  10 #include <linker_lists.h>
  11
  12 /* Platform-specific defines */
  13 #include <linux/compiler.h>
  14 #include <asm/global_data.h>
  15 #include <asm/spl.h>
  16 #include <handoff.h>
  17
  18 struct blk_desc;
  19 struct image_header;
  20
  21 /* Value in r0 indicates we booted from U-Boot */
  22 #define UBOOT_NOT_LOADED_FROM_SPL       0x13578642
  23
  24 /* Boot type */
  25 #define MMCSD_MODE_UNDEFINED    0
  26 #define MMCSD_MODE_RAW          1
  27 #define MMCSD_MODE_FS           2
  28 #define MMCSD_MODE_EMMCBOOT     3
  29
  30 struct blk_desc;
  31 struct image_header;
  32
  33 /*
  34  * u_boot_first_phase() - check if this is the first U-Boot phase
  35  *
  36  * U-Boot has up to three phases: TPL, SPL and U-Boot proper. Depending on the
  37  * build flags we can determine whether the current build is for the first
  38  * phase of U-Boot or not. If there is no SPL, then this is U-Boot proper. If
  39  * there is SPL but no TPL, the the first phase is SPL. If there is TPL, then
  40  * it is the first phase.
  41  *
  42  * @returns true if this is the first phase of U-Boot
  43  *
  44  */
  45 static inline bool u_boot_first_phase(void)
  46 {
  47         if (IS_ENABLED(CONFIG_TPL)) {
  48                 if (IS_ENABLED(CONFIG_TPL_BUILD))
  49                         return true;
  50         } else if (IS_ENABLED(CONFIG_SPL)) {
  51                 if (IS_ENABLED(CONFIG_SPL_BUILD))
  52                         return true;
  53         } else {
  54                 return true;
  55         }
  56
  57         return false;
  58 }
  59
  60 enum u_boot_phase {
  61         PHASE_TPL,      /* Running in TPL */
  62         PHASE_SPL,      /* Running in SPL */
  63         PHASE_BOARD_F,  /* Running in U-Boot before relocation */
  64         PHASE_BOARD_R,  /* Running in U-Boot after relocation */
  65 };
  66
  67 /**
  68  * spl_phase() - Find out the phase of U-Boot
  69  *
  70  * This can be used to avoid #ifdef logic and use if() instead.
  71  *
  72  * For example, to include code only in TPL, you might do:
  73  *
  74  *    #ifdef CONFIG_TPL_BUILD
  75  *    ...
  76  *    #endif
  77  *
  78  * but with this you can use:
  79  *
  80  *    if (spl_phase() == PHASE_TPL) {
  81  *       ...
  82  *    }
  83  *
  84  * To include code only in SPL, you might do:
  85  *
  86  *    #if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD)
  87  *    ...
  88  *    #endif
  89  *
  90  * but with this you can use:
  91  *
  92  *    if (spl_phase() == PHASE_SPL) {
  93  *       ...
  94  *    }
  95  *
  96  * To include code only in U-Boot proper, you might do:
  97  *
  98  *    #ifndef CONFIG_SPL_BUILD
  99  *    ...
 100  *    #endif
 101  *
 102  * but with this you can use:
 103  *
 104  *    if (spl_phase() == PHASE_BOARD_F) {
 105  *       ...
 106  *    }
 107  *
 108  * @return U-Boot phase
 109  */
 110 static inline enum u_boot_phase spl_phase(void)
 111 {
 112 #ifdef CONFIG_TPL_BUILD
 113         return PHASE_TPL;
 114 #elif CONFIG_SPL_BUILD
 115         return PHASE_SPL;
 116 #else
 117         DECLARE_GLOBAL_DATA_PTR;
 118
 119         if (!(gd->flags & GD_FLG_RELOC))
 120                 return PHASE_BOARD_F;
 121         else
 122                 return PHASE_BOARD_R;
 123 #endif
 124 }
 125
 126 /* A string name for SPL or TPL */
 127 #ifdef CONFIG_SPL_BUILD
 128 # ifdef CONFIG_TPL_BUILD
 129 #  define SPL_TPL_NAME  "TPL"
 130 # else
 131 #  define SPL_TPL_NAME  "SPL"
 132 # endif
 133 # define SPL_TPL_PROMPT SPL_TPL_NAME ": "
 134 #else
 135 # define SPL_TPL_NAME   ""
 136 # define SPL_TPL_PROMPT ""
 137 #endif
 138
 139 struct spl_image_info {
 140         const char *name;
 141         u8 os;
 142         uintptr_t load_addr;
 143         uintptr_t entry_point;
 144 #if CONFIG_IS_ENABLED(LOAD_FIT) || CONFIG_IS_ENABLED(LOAD_FIT_FULL)
 145         void *fdt_addr;
 146 #endif
 147         u32 boot_device;
 148         u32 size;
 149         u32 flags;
 150         void *arg;
 151 #ifdef CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK
 152         ulong dcrc_data;
 153         ulong dcrc_length;
 154         ulong dcrc;
 155 #endif
 156 };
 157
 158 /*
 159  * Information required to load data from a device
 160  *
 161  * @dev: Pointer to the device, e.g. struct mmc *
 162  * @priv: Private data for the device
 163  * @bl_len: Block length for reading in bytes
 164  * @filename: Name of the fit image file.
 165  * @read: Function to call to read from the device
 166  */
 167 struct spl_load_info {
 168         void *dev;
 169         void *priv;
 170         int bl_len;
 171         const char *filename;
 172         ulong (*read)(struct spl_load_info *load, ulong sector, ulong count,
 173                       void *buf);
 174 };
 175
 176 /*
 177  * We need to know the position of U-Boot in memory so we can jump to it. We
 178  * allow any U-Boot binary to be used (u-boot.bin, u-boot-nodtb.bin,
 179  * u-boot.img), hence the '_any'. These is no checking here that the correct
 180  * image is found. For example if u-boot.img is used we don't check that
 181  * spl_parse_image_header() can parse a valid header.
 182  *
 183  * Similarly for SPL, so that TPL can jump to SPL.
 184  */
 185 binman_sym_extern(ulong, u_boot_any, image_pos);
 186 binman_sym_extern(ulong, u_boot_any, size);
 187 binman_sym_extern(ulong, spl, image_pos);
 188 binman_sym_extern(ulong, spl, size);
 189
 190 /**
 191  * spl_get_image_pos() - get the image position of the next phase
 192  *
 193  * This returns the image position to use to load the next phase of U-Boot
 194  */
 195 ulong spl_get_image_pos(void);
 196
 197 /**
 198  * spl_get_image_size() - get the size of the next phase
 199  *
 200  * This returns the size to use to load the next phase of U-Boot
 201  */
 202 ulong spl_get_image_size(void);
 203
 204 /**
 205  * spl_load_simple_fit_skip_processing() - Hook to allow skipping the FIT
 206  *      image processing during spl_load_simple_fit().
 207  *
 208  * Return true to skip FIT processing, false to preserve the full code flow
 209  * of spl_load_simple_fit().
 210  */
 211 bool spl_load_simple_fit_skip_processing(void);
 212
 213 /**
 214  * spl_load_simple_fit() - Loads a fit image from a device.
 215  * @spl_image:  Image description to set up
 216  * @info:       Structure containing the information required to load data.
 217  * @sector:     Sector number where FIT image is located in the device
 218  * @fdt:        Pointer to the copied FIT header.
 219  *
 220  * Reads the FIT image @sector in the device. Loads u-boot image to
 221  * specified load address and copies the dtb to end of u-boot image.
 222  * Returns 0 on success.
 223  */
 224 int spl_load_simple_fit(struct spl_image_info *spl_image,
 225                         struct spl_load_info *info, ulong sector, void *fdt);
 226
 227 #define SPL_COPY_PAYLOAD_ONLY   1
 228 #define SPL_FIT_FOUND           2
 229
 230 /**
 231  * spl_load_legacy_img() - Loads a legacy image from a device.
 232  * @spl_image:  Image description to set up
 233  * @load:       Structure containing the information required to load data.
 234  * @header:     Pointer to image header (including appended image)
 235  *
 236  * Reads an legacy image from the device. Loads u-boot image to
 237  * specified load address.
 238  * Returns 0 on success.
 239  */
 240 int spl_load_legacy_img(struct spl_image_info *spl_image,
 241                         struct spl_load_info *load, ulong header);
 242
 243 /**
 244  * spl_load_imx_container() - Loads a imx container image from a device.
 245  * @spl_image:  Image description to set up
 246  * @info:       Structure containing the information required to load data.
 247  * @sector:     Sector number where container image is located in the device
 248  *
 249  * Reads the container image @sector in the device. Loads u-boot image to
 250  * specified load address.
 251  */
 252 int spl_load_imx_container(struct spl_image_info *spl_image,
 253                            struct spl_load_info *info, ulong sector);
 254
 255 /* SPL common functions */
 256 void preloader_console_init(void);
 257 u32 spl_boot_device(void);
 258
 259 /**
 260  * spl_mmc_boot_mode() - Lookup function for the mode of an MMC boot source.
 261  * @boot_device:        ID of the device which the MMC driver wants to read
 262  *                      from.  Common values are e.g. BOOT_DEVICE_MMC1,
 263  *                      BOOT_DEVICE_MMC2, BOOT_DEVICE_MMC2_2.
 264  *
 265  * This function should return one of MMCSD_MODE_FS, MMCSD_MODE_EMMCBOOT, or
 266  * MMCSD_MODE_RAW for each MMC boot source which is defined for the target.  The
 267  * boot_device parameter tells which device the MMC driver is interested in.
 268  *
 269  * If not overridden, it is weakly defined in common/spl/spl_mmc.c.
 270  *
 271  * Note:  It is important to use the boot_device parameter instead of e.g.
 272  * spl_boot_device() as U-Boot is not always loaded from the same device as SPL.
 273  */
 274 u32 spl_mmc_boot_mode(const u32 boot_device);
 275
 276 /**
 277  * spl_mmc_boot_partition() - MMC partition to load U-Boot from.
 278  * @boot_device:        ID of the device which the MMC driver wants to load
 279  *                      U-Boot from.
 280  *
 281  * This function should return the partition number which the SPL
 282  * should load U-Boot from (on the given boot_device) when
 283  * CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION is set.
 284  *
 285  * If not overridden, it is weakly defined in common/spl/spl_mmc.c.
 286  */
 287 int spl_mmc_boot_partition(const u32 boot_device);
 288 void spl_set_bd(void);
 289
 290 /**
 291  * spl_set_header_raw_uboot() - Set up a standard SPL image structure
 292  *
 293  * This sets up the given spl_image which the standard values obtained from
 294  * config options: CONFIG_SYS_MONITOR_LEN, CONFIG_SYS_UBOOT_START,
 295  * CONFIG_SYS_TEXT_BASE.
 296  *
 297  * @spl_image: Image description to set up
 298  */
 299 void spl_set_header_raw_uboot(struct spl_image_info *spl_image);
 300
 301 /**
 302  * spl_parse_image_header() - parse the image header and set up info
 303  *
 304  * This parses the legacy image header information at @header and sets up
 305  * @spl_image according to what is found. If no image header is found, then
 306  * a raw image or bootz is assumed. If CONFIG_SPL_PANIC_ON_RAW_IMAGE is
 307  * enabled, then this causes a panic. If CONFIG_SPL_RAW_IMAGE_SUPPORT is not
 308  * enabled then U-Boot gives up. Otherwise U-Boot sets up the image using
 309  * spl_set_header_raw_uboot(), or possibly the bootz header.
 310  *
 311  * @spl_image: Image description to set up
 312  * @header image header to parse
 313  * @return 0 if a header was correctly parsed, -ve on error
 314  */
 315 int spl_parse_image_header(struct spl_image_info *spl_image,
 316                            const struct image_header *header);
 317
 318 void spl_board_prepare_for_linux(void);
 319 void spl_board_prepare_for_boot(void);
 320 int spl_board_ubi_load_image(u32 boot_device);
 321 int spl_board_boot_device(u32 boot_device);
 322
 323 /**
 324  * jump_to_image_linux() - Jump to a Linux kernel from SPL
 325  *
 326  * This jumps into a Linux kernel using the information in @spl_image.
 327  *
 328  * @spl_image: Image description to set up
 329  */
 330 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image);
 331
 332 /**
 333  * spl_start_uboot() - Check if SPL should start the kernel or U-Boot
 334  *
 335  * This is called by the various SPL loaders to determine whether the board
 336  * wants to load the kernel or U-Boot. This function should be provided by
 337  * the board.
 338  *
 339  * @return 0 if SPL should start the kernel, 1 if U-Boot must be started
 340  */
 341 int spl_start_uboot(void);
 342
 343 /**
 344  * spl_display_print() - Display a board-specific message in SPL
 345  *
 346  * If CONFIG_SPL_DISPLAY_PRINT is enabled, U-Boot will call this function
 347  * immediately after displaying the SPL console banner ("U-Boot SPL ...").
 348  * This function should be provided by the board.
 349  */
 350 void spl_display_print(void);
 351
 352 /**
 353  * struct spl_boot_device - Describes a boot device used by SPL
 354  *
 355  * @boot_device: A number indicating the BOOT_DEVICE type. There are various
 356  * BOOT_DEVICE... #defines and enums in U-Boot and they are not consistently
 357  * numbered.
 358  * @boot_device_name: Named boot device, or NULL if none.
 359  *
 360  * Note: Additional fields can be added here, bearing in mind that SPL is
 361  * size-sensitive and common fields will be present on all boards. This
 362  * struct can also be used to return additional information about the load
 363  * process if that becomes useful.
 364  */
 365 struct spl_boot_device {
 366         uint boot_device;
 367         const char *boot_device_name;
 368 };
 369
 370 /**
 371  * Holds information about a way of loading an SPL image
 372  *
 373  * @name: User-friendly name for this method (e.g. "MMC")
 374  * @boot_device: Boot device that this loader supports
 375  * @load_image: Function to call to load image
 376  */
 377 struct spl_image_loader {
 378 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 379         const char *name;
 380 #endif
 381         uint boot_device;
 382         /**
 383          * load_image() - Load an SPL image
 384          *
 385          * @spl_image: place to put image information
 386          * @bootdev: describes the boot device to load from
 387          */
 388         int (*load_image)(struct spl_image_info *spl_image,
 389                           struct spl_boot_device *bootdev);
 390 };
 391
 392 /* Declare an SPL image loader */
 393 #define SPL_LOAD_IMAGE(__name)                                  \
 394         ll_entry_declare(struct spl_image_loader, __name, spl_image_loader)
 395
 396 /*
 397  * _priority is the priority of this method, 0 meaning it will be the top
 398  * choice for this device, 9 meaning it is the bottom choice.
 399  * _boot_device is the BOOT_DEVICE_... value
 400  * _method is the load_image function to call
 401  */
 402 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 403 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 404         SPL_LOAD_IMAGE(_boot_device ## _priority ## _method) = { \
 405                 .name = _name, \
 406                 .boot_device = _boot_device, \
 407                 .load_image = _method, \
 408         }
 409 #else
 410 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 411         SPL_LOAD_IMAGE(_boot_device ## _priority ## _method) = { \
 412                 .boot_device = _boot_device, \
 413                 .load_image = _method, \
 414         }
 415 #endif
 416
 417 /* SPL FAT image functions */
 418 int spl_load_image_fat(struct spl_image_info *spl_image,
 419                        struct blk_desc *block_dev, int partition,
 420                        const char *filename);
 421 int spl_load_image_fat_os(struct spl_image_info *spl_image,
 422                           struct blk_desc *block_dev, int partition);
 423
 424 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image);
 425
 426 /* SPL EXT image functions */
 427 int spl_load_image_ext(struct spl_image_info *spl_image,
 428                        struct blk_desc *block_dev, int partition,
 429                        const char *filename);
 430 int spl_load_image_ext_os(struct spl_image_info *spl_image,
 431                           struct blk_desc *block_dev, int partition);
 432
 433 /**
 434  * spl_early_init() - Set up device tree and driver model in SPL if enabled
 435  *
 436  * Call this function in board_init_f() if you want to use device tree and
 437  * driver model early, before board_init_r() is called.
 438  *
 439  * If this is not called, then driver model will be inactive in SPL's
 440  * board_init_f(), and no device tree will be available.
 441  */
 442 int spl_early_init(void);
 443
 444 /**
 445  * spl_init() - Set up device tree and driver model in SPL if enabled
 446  *
 447  * You can optionally call spl_early_init(), then optionally call spl_init().
 448  * This function will be called from board_init_r() if not called earlier.
 449  *
 450  * Both spl_early_init() and spl_init() perform a similar function except that
 451  * the latter will not set up the malloc() area if
 452  * CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN is enabled, since it is assumed to
 453  * already be done by a calll to spl_relocate_stack_gd() before board_init_r()
 454  * is reached.
 455  *
 456  * This function will be called from board_init_r() if not called earlier.
 457  *
 458  * If this is not called, then driver model will be inactive in SPL's
 459  * board_init_f(), and no device tree will be available.
 460  */
 461 int spl_init(void);
 462
 463 #ifdef CONFIG_SPL_BOARD_INIT
 464 void spl_board_init(void);
 465 #endif
 466
 467 /**
 468  * spl_was_boot_source() - check if U-Boot booted from SPL
 469  *
 470  * This will normally be true, but if U-Boot jumps to second U-Boot, it will
 471  * be false. This should be implemented by board-specific code.
 472  *
 473  * @return true if U-Boot booted from SPL, else false
 474  */
 475 bool spl_was_boot_source(void);
 476
 477 /**
 478  * spl_dfu_cmd- run dfu command with chosen mmc device interface
 479  * @param usb_index - usb controller number
 480  * @param mmc_dev -  mmc device nubmer
 481  *
 482  * @return 0 on success, otherwise error code
 483  */
 484 int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
 485
 486 int spl_mmc_load_image(struct spl_image_info *spl_image,
 487                        struct spl_boot_device *bootdev);
 488
 489 /**
 490  * spl_mmc_load() - Load an image file from MMC/SD media
 491  *
 492  * @param spl_image     Image data filled in by loading process
 493  * @param bootdev       Describes which device to load from
 494  * @param filename      Name of file to load (in FS mode)
 495  * @param raw_part      Partition to load from (in RAW mode)
 496  * @param raw_sect      Sector to load from (in RAW mode)
 497  *
 498  * @return 0 on success, otherwise error code
 499  */
 500 int spl_mmc_load(struct spl_image_info *spl_image,
 501                  struct spl_boot_device *bootdev,
 502                  const char *filename,
 503                  int raw_part,
 504                  unsigned long raw_sect);
 505
 506 int spl_ymodem_load_image(struct spl_image_info *spl_image,
 507                           struct spl_boot_device *bootdev);
 508
 509 /**
 510  * spl_invoke_atf - boot using an ARM trusted firmware image
 511  */
 512 void spl_invoke_atf(struct spl_image_info *spl_image);
 513
 514 /**
 515  * bl2_plat_get_bl31_params() - prepare params for bl31.
 516  * @bl32_entry  address of BL32 executable (secure)
 517  * @bl33_entry  address of BL33 executable (non secure)
 518  * @fdt_addr    address of Flat Device Tree
 519  *
 520  * This function assigns a pointer to the memory that the platform has kept
 521  * aside to pass platform specific and trusted firmware related information
 522  * to BL31. This memory is allocated by allocating memory to
 523  * bl2_to_bl31_params_mem structure which is a superset of all the
 524  * structure whose information is passed to BL31
 525  * NOTE: This function should be called only once and should be done
 526  * before generating params to BL31
 527  *
 528  * @return bl31 params structure pointer
 529  */
 530 struct bl31_params *bl2_plat_get_bl31_params(uintptr_t bl32_entry,
 531                                              uintptr_t bl33_entry,
 532                                              uintptr_t fdt_addr);
 533
 534 /**
 535  * spl_optee_entry - entry function for optee
 536  *
 537  * args defind in op-tee project
 538  * https://github.com/OP-TEE/optee_os/
 539  * core/arch/arm/kernel/generic_entry_a32.S
 540  * @arg0: pagestore
 541  * @arg1: (ARMv7 standard bootarg #1)
 542  * @arg2: device tree address, (ARMv7 standard bootarg #2)
 543  * @arg3: non-secure entry address (ARMv7 bootarg #0)
 544  */
 545 void spl_optee_entry(void *arg0, void *arg1, void *arg2, void *arg3);
 546
 547 /**
 548  * spl_invoke_opensbi - boot using a RISC-V OpenSBI image
 549  */
 550 void spl_invoke_opensbi(struct spl_image_info *spl_image);
 551
 552 /**
 553  * board_return_to_bootrom - allow for boards to continue with the boot ROM
 554  *
 555  * If a board (e.g. the Rockchip RK3368 boards) provide some
 556  * supporting functionality for SPL in their boot ROM and the SPL
 557  * stage wants to return to the ROM code to continue booting, boards
 558  * can implement 'board_return_to_bootrom'.
 559  */
 560 int board_return_to_bootrom(struct spl_image_info *spl_image,
 561                             struct spl_boot_device *bootdev);
 562
 563 /**
 564  * board_spl_fit_post_load - allow process images after loading finished
 565  *
 566  */
 567 void board_spl_fit_post_load(ulong load_addr, size_t length);
 568
 569 /**
 570  * board_spl_fit_size_align - specific size align before processing payload
 571  *
 572  */
 573 ulong board_spl_fit_size_align(ulong size);
 574
 575 /**
 576  * spl_perform_fixups() - arch/board-specific callback before processing
 577  *                        the boot-payload
 578  */
 579 void spl_perform_fixups(struct spl_image_info *spl_image);
 580
 581 /*
 582  * spl_get_load_buffer() - get buffer for loading partial image data
 583  *
 584  * Returns memory area which can be populated by partial image data,
 585  * ie. uImage or fitImage header.
 586  */
 587 struct image_header *spl_get_load_buffer(ssize_t offset, size_t size);
 588
 589 void spl_save_restore_data(void);
 590 #endif