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 /* A string name for SPL or TPL */
  53 #ifdef CONFIG_SPL_BUILD
  54 # ifdef CONFIG_TPL_BUILD
  55 #  define SPL_TPL_NAME  "TPL"
  56 # else
  57 #  define SPL_TPL_NAME  "SPL"
  58 # endif
  59 # define SPL_TPL_PROMPT SPL_TPL_NAME ": "
  60 #else
  61 # define SPL_TPL_NAME   ""
  62 # define SPL_TPL_PROMPT ""
  63 #endif
  64
  65 struct spl_image_info {
  66         const char *name;
  67         u8 os;
  68         uintptr_t load_addr;
  69         uintptr_t entry_point;
  70 #if CONFIG_IS_ENABLED(LOAD_FIT)
  71         void *fdt_addr;
  72 #endif
  73         u32 boot_device;
  74         u32 size;
  75         u32 flags;
  76         void *arg;
  77 #ifdef CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK
  78         ulong dcrc_data;
  79         ulong dcrc_length;
  80         ulong dcrc;
  81 #endif
  82 };
  83
  84 /*
  85  * Information required to load data from a device
  86  *
  87  * @dev: Pointer to the device, e.g. struct mmc *
  88  * @priv: Private data for the device
  89  * @bl_len: Block length for reading in bytes
  90  * @filename: Name of the fit image file.
  91  * @read: Function to call to read from the device
  92  */
  93 struct spl_load_info {
  94         void *dev;
  95         void *priv;
  96         int bl_len;
  97         const char *filename;
  98         ulong (*read)(struct spl_load_info *load, ulong sector, ulong count,
  99                       void *buf);
 100 };
 101
 102 /*
 103  * We need to know the position of U-Boot in memory so we can jump to it. We
 104  * allow any U-Boot binary to be used (u-boot.bin, u-boot-nodtb.bin,
 105  * u-boot.img), hence the '_any'. These is no checking here that the correct
 106  * image is found. For * example if u-boot.img is used we don't check that
 107  * spl_parse_image_header() can parse a valid header.
 108  */
 109 binman_sym_extern(ulong, u_boot_any, image_pos);
 110
 111 /**
 112  * spl_load_simple_fit() - Loads a fit image from a device.
 113  * @spl_image:  Image description to set up
 114  * @info:       Structure containing the information required to load data.
 115  * @sector:     Sector number where FIT image is located in the device
 116  * @fdt:        Pointer to the copied FIT header.
 117  *
 118  * Reads the FIT image @sector in the device. Loads u-boot image to
 119  * specified load address and copies the dtb to end of u-boot image.
 120  * Returns 0 on success.
 121  */
 122 int spl_load_simple_fit(struct spl_image_info *spl_image,
 123                         struct spl_load_info *info, ulong sector, void *fdt);
 124
 125 #define SPL_COPY_PAYLOAD_ONLY   1
 126 #define SPL_FIT_FOUND           2
 127
 128 /* SPL common functions */
 129 void preloader_console_init(void);
 130 u32 spl_boot_device(void);
 131 u32 spl_boot_mode(const u32 boot_device);
 132 int spl_boot_partition(const u32 boot_device);
 133 void spl_set_bd(void);
 134
 135 /**
 136  * spl_set_header_raw_uboot() - Set up a standard SPL image structure
 137  *
 138  * This sets up the given spl_image which the standard values obtained from
 139  * config options: CONFIG_SYS_MONITOR_LEN, CONFIG_SYS_UBOOT_START,
 140  * CONFIG_SYS_TEXT_BASE.
 141  *
 142  * @spl_image: Image description to set up
 143  */
 144 void spl_set_header_raw_uboot(struct spl_image_info *spl_image);
 145
 146 /**
 147  * spl_parse_image_header() - parse the image header and set up info
 148  *
 149  * This parses the legacy image header information at @header and sets up
 150  * @spl_image according to what is found. If no image header is found, then
 151  * a raw image or bootz is assumed. If CONFIG_SPL_PANIC_ON_RAW_IMAGE is
 152  * enabled, then this causes a panic. If CONFIG_SPL_RAW_IMAGE_SUPPORT is not
 153  * enabled then U-Boot gives up. Otherwise U-Boot sets up the image using
 154  * spl_set_header_raw_uboot(), or possibly the bootz header.
 155  *
 156  * @spl_image: Image description to set up
 157  * @header image header to parse
 158  * @return 0 if a header was correctly parsed, -ve on error
 159  */
 160 int spl_parse_image_header(struct spl_image_info *spl_image,
 161                            const struct image_header *header);
 162
 163 void spl_board_prepare_for_linux(void);
 164 void spl_board_prepare_for_boot(void);
 165 int spl_board_ubi_load_image(u32 boot_device);
 166
 167 /**
 168  * jump_to_image_linux() - Jump to a Linux kernel from SPL
 169  *
 170  * This jumps into a Linux kernel using the information in @spl_image.
 171  *
 172  * @spl_image: Image description to set up
 173  */
 174 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image);
 175
 176 /**
 177  * spl_start_uboot() - Check if SPL should start the kernel or U-Boot
 178  *
 179  * This is called by the various SPL loaders to determine whether the board
 180  * wants to load the kernel or U-Boot. This function should be provided by
 181  * the board.
 182  *
 183  * @return 0 if SPL should start the kernel, 1 if U-Boot must be started
 184  */
 185 int spl_start_uboot(void);
 186
 187 /**
 188  * spl_display_print() - Display a board-specific message in SPL
 189  *
 190  * If CONFIG_SPL_DISPLAY_PRINT is enabled, U-Boot will call this function
 191  * immediately after displaying the SPL console banner ("U-Boot SPL ...").
 192  * This function should be provided by the board.
 193  */
 194 void spl_display_print(void);
 195
 196 /**
 197  * struct spl_boot_device - Describes a boot device used by SPL
 198  *
 199  * @boot_device: A number indicating the BOOT_DEVICE type. There are various
 200  * BOOT_DEVICE... #defines and enums in U-Boot and they are not consistently
 201  * numbered.
 202  * @boot_device_name: Named boot device, or NULL if none.
 203  *
 204  * Note: Additional fields can be added here, bearing in mind that SPL is
 205  * size-sensitive and common fields will be present on all boards. This
 206  * struct can also be used to return additional information about the load
 207  * process if that becomes useful.
 208  */
 209 struct spl_boot_device {
 210         uint boot_device;
 211         const char *boot_device_name;
 212 };
 213
 214 /**
 215  * Holds information about a way of loading an SPL image
 216  *
 217  * @name: User-friendly name for this method (e.g. "MMC")
 218  * @boot_device: Boot device that this loader supports
 219  * @load_image: Function to call to load image
 220  */
 221 struct spl_image_loader {
 222 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 223         const char *name;
 224 #endif
 225         uint boot_device;
 226         /**
 227          * load_image() - Load an SPL image
 228          *
 229          * @spl_image: place to put image information
 230          * @bootdev: describes the boot device to load from
 231          */
 232         int (*load_image)(struct spl_image_info *spl_image,
 233                           struct spl_boot_device *bootdev);
 234 };
 235
 236 /* Declare an SPL image loader */
 237 #define SPL_LOAD_IMAGE(__name)                                  \
 238         ll_entry_declare(struct spl_image_loader, __name, spl_image_loader)
 239
 240 /*
 241  * _priority is the priority of this method, 0 meaning it will be the top
 242  * choice for this device, 9 meaning it is the bottom choice.
 243  * _boot_device is the BOOT_DEVICE_... value
 244  * _method is the load_image function to call
 245  */
 246 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 247 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 248         SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
 249                 .name = _name, \
 250                 .boot_device = _boot_device, \
 251                 .load_image = _method, \
 252         }
 253 #else
 254 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 255         SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
 256                 .boot_device = _boot_device, \
 257                 .load_image = _method, \
 258         }
 259 #endif
 260
 261 /* SPL FAT image functions */
 262 int spl_load_image_fat(struct spl_image_info *spl_image,
 263                        struct blk_desc *block_dev, int partition,
 264                        const char *filename);
 265 int spl_load_image_fat_os(struct spl_image_info *spl_image,
 266                           struct blk_desc *block_dev, int partition);
 267
 268 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image);
 269
 270 /* SPL EXT image functions */
 271 int spl_load_image_ext(struct spl_image_info *spl_image,
 272                        struct blk_desc *block_dev, int partition,
 273                        const char *filename);
 274 int spl_load_image_ext_os(struct spl_image_info *spl_image,
 275                           struct blk_desc *block_dev, int partition);
 276
 277 /**
 278  * spl_early_init() - Set up device tree and driver model in SPL if enabled
 279  *
 280  * Call this function in board_init_f() if you want to use device tree and
 281  * driver model early, before board_init_r() is called.
 282  *
 283  * If this is not called, then driver model will be inactive in SPL's
 284  * board_init_f(), and no device tree will be available.
 285  */
 286 int spl_early_init(void);
 287
 288 /**
 289  * spl_init() - Set up device tree and driver model in SPL if enabled
 290  *
 291  * You can optionally call spl_early_init(), then optionally call spl_init().
 292  * This function will be called from board_init_r() if not called earlier.
 293  *
 294  * Both spl_early_init() and spl_init() perform a similar function except that
 295  * the latter will not set up the malloc() area if
 296  * CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN is enabled, since it is assumed to
 297  * already be done by a calll to spl_relocate_stack_gd() before board_init_r()
 298  * is reached.
 299  *
 300  * This function will be called from board_init_r() if not called earlier.
 301  *
 302  * If this is not called, then driver model will be inactive in SPL's
 303  * board_init_f(), and no device tree will be available.
 304  */
 305 int spl_init(void);
 306
 307 #ifdef CONFIG_SPL_BOARD_INIT
 308 void spl_board_init(void);
 309 #endif
 310
 311 /**
 312  * spl_was_boot_source() - check if U-Boot booted from SPL
 313  *
 314  * This will normally be true, but if U-Boot jumps to second U-Boot, it will
 315  * be false. This should be implemented by board-specific code.
 316  *
 317  * @return true if U-Boot booted from SPL, else false
 318  */
 319 bool spl_was_boot_source(void);
 320
 321 /**
 322  * spl_dfu_cmd- run dfu command with chosen mmc device interface
 323  * @param usb_index - usb controller number
 324  * @param mmc_dev -  mmc device nubmer
 325  *
 326  * @return 0 on success, otherwise error code
 327  */
 328 int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
 329
 330 int spl_mmc_load_image(struct spl_image_info *spl_image,
 331                        struct spl_boot_device *bootdev);
 332
 333 /**
 334  * spl_invoke_atf - boot using an ARM trusted firmware image
 335  */
 336 void spl_invoke_atf(struct spl_image_info *spl_image);
 337
 338 /**
 339  * spl_optee_entry - entry function for optee
 340  *
 341  * args defind in op-tee project
 342  * https://github.com/OP-TEE/optee_os/
 343  * core/arch/arm/kernel/generic_entry_a32.S
 344  * @arg0: pagestore
 345  * @arg1: (ARMv7 standard bootarg #1)
 346  * @arg2: device tree address, (ARMv7 standard bootarg #2)
 347  * @arg3: non-secure entry address (ARMv7 bootarg #0)
 348  */
 349 void spl_optee_entry(void *arg0, void *arg1, void *arg2, void *arg3);
 350
 351 /**
 352  * board_return_to_bootrom - allow for boards to continue with the boot ROM
 353  *
 354  * If a board (e.g. the Rockchip RK3368 boards) provide some
 355  * supporting functionality for SPL in their boot ROM and the SPL
 356  * stage wants to return to the ROM code to continue booting, boards
 357  * can implement 'board_return_to_bootrom'.
 358  */
 359 void board_return_to_bootrom(void);
 360
 361 /**
 362  * board_spl_fit_post_load - allow process images after loading finished
 363  *
 364  */
 365 void board_spl_fit_post_load(ulong load_addr, size_t length);
 366
 367 /**
 368  * board_spl_fit_size_align - specific size align before processing payload
 369  *
 370  */
 371 ulong board_spl_fit_size_align(ulong size);
 372
 373 /**
 374  * spl_perform_fixups() - arch/board-specific callback before processing
 375  *                        the boot-payload
 376  */
 377 void spl_perform_fixups(struct spl_image_info *spl_image);
 378
 379 /*
 380  * spl_get_load_buffer() - get buffer for loading partial image data
 381  *
 382  * Returns memory area which can be populated by partial image data,
 383  * ie. uImage or fitImage header.
 384  */
 385 struct image_header *spl_get_load_buffer(ssize_t offset, size_t size);
 386
 387 #endif