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