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
  15 /* Value in r0 indicates we booted from U-Boot */
  16 #define UBOOT_NOT_LOADED_FROM_SPL       0x13578642
  17
  18 /* Boot type */
  19 #define MMCSD_MODE_UNDEFINED    0
  20 #define MMCSD_MODE_RAW          1
  21 #define MMCSD_MODE_FS           2
  22 #define MMCSD_MODE_EMMCBOOT     3
  23
  24 struct spl_image_info {
  25         const char *name;
  26         u8 os;
  27         uintptr_t load_addr;
  28         uintptr_t entry_point;
  29 #if CONFIG_IS_ENABLED(LOAD_FIT)
  30         void *fdt_addr;
  31 #endif
  32         u32 boot_device;
  33         u32 size;
  34         u32 flags;
  35         void *arg;
  36 };
  37
  38 /*
  39  * Information required to load data from a device
  40  *
  41  * @dev: Pointer to the device, e.g. struct mmc *
  42  * @priv: Private data for the device
  43  * @bl_len: Block length for reading in bytes
  44  * @filename: Name of the fit image file.
  45  * @read: Function to call to read from the device
  46  */
  47 struct spl_load_info {
  48         void *dev;
  49         void *priv;
  50         int bl_len;
  51         const char *filename;
  52         ulong (*read)(struct spl_load_info *load, ulong sector, ulong count,
  53                       void *buf);
  54 };
  55
  56 /*
  57  * We need to know the position of U-Boot in memory so we can jump to it. We
  58  * allow any U-Boot binary to be used (u-boot.bin, u-boot-nodtb.bin,
  59  * u-boot.img), hence the '_any'. These is no checking here that the correct
  60  * image is found. For * example if u-boot.img is used we don't check that
  61  * spl_parse_image_header() can parse a valid header.
  62  */
  63 binman_sym_extern(ulong, u_boot_any, image_pos);
  64
  65 /**
  66  * spl_load_simple_fit() - Loads a fit image from a device.
  67  * @spl_image:  Image description to set up
  68  * @info:       Structure containing the information required to load data.
  69  * @sector:     Sector number where FIT image is located in the device
  70  * @fdt:        Pointer to the copied FIT header.
  71  *
  72  * Reads the FIT image @sector in the device. Loads u-boot image to
  73  * specified load address and copies the dtb to end of u-boot image.
  74  * Returns 0 on success.
  75  */
  76 int spl_load_simple_fit(struct spl_image_info *spl_image,
  77                         struct spl_load_info *info, ulong sector, void *fdt);
  78
  79 #define SPL_COPY_PAYLOAD_ONLY   1
  80
  81 /* SPL common functions */
  82 void preloader_console_init(void);
  83 u32 spl_boot_device(void);
  84 u32 spl_boot_mode(const u32 boot_device);
  85 int spl_boot_partition(const u32 boot_device);
  86 void spl_set_bd(void);
  87
  88 /**
  89  * spl_set_header_raw_uboot() - Set up a standard SPL image structure
  90  *
  91  * This sets up the given spl_image which the standard values obtained from
  92  * config options: CONFIG_SYS_MONITOR_LEN, CONFIG_SYS_UBOOT_START,
  93  * CONFIG_SYS_TEXT_BASE.
  94  *
  95  * @spl_image: Image description to set up
  96  */
  97 void spl_set_header_raw_uboot(struct spl_image_info *spl_image);
  98
  99 /**
 100  * spl_parse_image_header() - parse the image header and set up info
 101  *
 102  * This parses the legacy image header information at @header and sets up
 103  * @spl_image according to what is found. If no image header is found, then
 104  * a raw image or bootz is assumed. If CONFIG_SPL_PANIC_ON_RAW_IMAGE is
 105  * enabled, then this causes a panic. If CONFIG_SPL_RAW_IMAGE_SUPPORT is not
 106  * enabled then U-Boot gives up. Otherwise U-Boot sets up the image using
 107  * spl_set_header_raw_uboot(), or possibly the bootz header.
 108  *
 109  * @spl_image: Image description to set up
 110  * @header image header to parse
 111  * @return 0 if a header was correctly parsed, -ve on error
 112  */
 113 int spl_parse_image_header(struct spl_image_info *spl_image,
 114                            const struct image_header *header);
 115
 116 void spl_board_prepare_for_linux(void);
 117 void spl_board_prepare_for_boot(void);
 118 int spl_board_ubi_load_image(u32 boot_device);
 119
 120 /**
 121  * jump_to_image_linux() - Jump to a Linux kernel from SPL
 122  *
 123  * This jumps into a Linux kernel using the information in @spl_image.
 124  *
 125  * @spl_image: Image description to set up
 126  */
 127 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image);
 128
 129 /**
 130  * spl_start_uboot() - Check if SPL should start the kernel or U-Boot
 131  *
 132  * This is called by the various SPL loaders to determine whether the board
 133  * wants to load the kernel or U-Boot. This function should be provided by
 134  * the board.
 135  *
 136  * @return 0 if SPL should start the kernel, 1 if U-Boot must be started
 137  */
 138 int spl_start_uboot(void);
 139
 140 /**
 141  * spl_display_print() - Display a board-specific message in SPL
 142  *
 143  * If CONFIG_SPL_DISPLAY_PRINT is enabled, U-Boot will call this function
 144  * immediately after displaying the SPL console banner ("U-Boot SPL ...").
 145  * This function should be provided by the board.
 146  */
 147 void spl_display_print(void);
 148
 149 /**
 150  * struct spl_boot_device - Describes a boot device used by SPL
 151  *
 152  * @boot_device: A number indicating the BOOT_DEVICE type. There are various
 153  * BOOT_DEVICE... #defines and enums in U-Boot and they are not consistently
 154  * numbered.
 155  * @boot_device_name: Named boot device, or NULL if none.
 156  *
 157  * Note: Additional fields can be added here, bearing in mind that SPL is
 158  * size-sensitive and common fields will be present on all boards. This
 159  * struct can also be used to return additional information about the load
 160  * process if that becomes useful.
 161  */
 162 struct spl_boot_device {
 163         uint boot_device;
 164         const char *boot_device_name;
 165 };
 166
 167 /**
 168  * Holds information about a way of loading an SPL image
 169  *
 170  * @name: User-friendly name for this method (e.g. "MMC")
 171  * @boot_device: Boot device that this loader supports
 172  * @load_image: Function to call to load image
 173  */
 174 struct spl_image_loader {
 175 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 176         const char *name;
 177 #endif
 178         uint boot_device;
 179         /**
 180          * load_image() - Load an SPL image
 181          *
 182          * @spl_image: place to put image information
 183          * @bootdev: describes the boot device to load from
 184          */
 185         int (*load_image)(struct spl_image_info *spl_image,
 186                           struct spl_boot_device *bootdev);
 187 };
 188
 189 /* Declare an SPL image loader */
 190 #define SPL_LOAD_IMAGE(__name)                                  \
 191         ll_entry_declare(struct spl_image_loader, __name, spl_image_loader)
 192
 193 /*
 194  * _priority is the priority of this method, 0 meaning it will be the top
 195  * choice for this device, 9 meaning it is the bottom choice.
 196  * _boot_device is the BOOT_DEVICE_... value
 197  * _method is the load_image function to call
 198  */
 199 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 200 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 201         SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
 202                 .name = _name, \
 203                 .boot_device = _boot_device, \
 204                 .load_image = _method, \
 205         }
 206 #else
 207 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 208         SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
 209                 .boot_device = _boot_device, \
 210                 .load_image = _method, \
 211         }
 212 #endif
 213
 214 /* SPL FAT image functions */
 215 int spl_load_image_fat(struct spl_image_info *spl_image,
 216                        struct blk_desc *block_dev, int partition,
 217                        const char *filename);
 218 int spl_load_image_fat_os(struct spl_image_info *spl_image,
 219                           struct blk_desc *block_dev, int partition);
 220
 221 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image);
 222
 223 /* SPL EXT image functions */
 224 int spl_load_image_ext(struct spl_image_info *spl_image,
 225                        struct blk_desc *block_dev, int partition,
 226                        const char *filename);
 227 int spl_load_image_ext_os(struct spl_image_info *spl_image,
 228                           struct blk_desc *block_dev, int partition);
 229
 230 /**
 231  * spl_early_init() - Set up device tree and driver model in SPL if enabled
 232  *
 233  * Call this function in board_init_f() if you want to use device tree and
 234  * driver model early, before board_init_r() is called.
 235  *
 236  * If this is not called, then driver model will be inactive in SPL's
 237  * board_init_f(), and no device tree will be available.
 238  */
 239 int spl_early_init(void);
 240
 241 /**
 242  * spl_init() - Set up device tree and driver model in SPL if enabled
 243  *
 244  * You can optionally call spl_early_init(), then optionally call spl_init().
 245  * This function will be called from board_init_r() if not called earlier.
 246  *
 247  * Both spl_early_init() and spl_init() perform a similar function except that
 248  * the latter will not set up the malloc() area if
 249  * CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN is enabled, since it is assumed to
 250  * already be done by a calll to spl_relocate_stack_gd() before board_init_r()
 251  * is reached.
 252  *
 253  * This function will be called from board_init_r() if not called earlier.
 254  *
 255  * If this is not called, then driver model will be inactive in SPL's
 256  * board_init_f(), and no device tree will be available.
 257  */
 258 int spl_init(void);
 259
 260 #ifdef CONFIG_SPL_BOARD_INIT
 261 void spl_board_init(void);
 262 #endif
 263
 264 /**
 265  * spl_was_boot_source() - check if U-Boot booted from SPL
 266  *
 267  * This will normally be true, but if U-Boot jumps to second U-Boot, it will
 268  * be false. This should be implemented by board-specific code.
 269  *
 270  * @return true if U-Boot booted from SPL, else false
 271  */
 272 bool spl_was_boot_source(void);
 273
 274 /**
 275  * spl_dfu_cmd- run dfu command with chosen mmc device interface
 276  * @param usb_index - usb controller number
 277  * @param mmc_dev -  mmc device nubmer
 278  *
 279  * @return 0 on success, otherwise error code
 280  */
 281 int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
 282
 283 int spl_mmc_load_image(struct spl_image_info *spl_image,
 284                        struct spl_boot_device *bootdev);
 285
 286 /**
 287  * spl_invoke_atf - boot using an ARM trusted firmware image
 288  */
 289 void spl_invoke_atf(struct spl_image_info *spl_image);
 290
 291 /**
 292  * board_return_to_bootrom - allow for boards to continue with the boot ROM
 293  *
 294  * If a board (e.g. the Rockchip RK3368 boards) provide some
 295  * supporting functionality for SPL in their boot ROM and the SPL
 296  * stage wants to return to the ROM code to continue booting, boards
 297  * can implement 'board_return_to_bootrom'.
 298  */
 299 void board_return_to_bootrom(void);
 300
 301 /**
 302  * spl_perform_fixups() - arch/board-specific callback before processing
 303  *                        the boot-payload
 304  */
 305 void spl_perform_fixups(struct spl_image_info *spl_image);
 306 #endif