include/spl.h

   1 /*
   2  * (C) Copyright 2012
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #ifndef _SPL_H_
   8 #define _SPL_H_
   9
  10 #include <binman_sym.h>
  11
  12 /* Platform-specific defines */
  13 #include <linux/compiler.h>
  14 #include <asm/spl.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 struct spl_image_info {
  26         const char *name;
  27         u8 os;
  28         uintptr_t load_addr;
  29         uintptr_t entry_point;
  30 #if CONFIG_IS_ENABLED(LOAD_FIT)
  31         void *fdt_addr;
  32 #endif
  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, 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 void spl_set_bd(void);
  86
  87 /**
  88  * spl_set_header_raw_uboot() - Set up a standard SPL image structure
  89  *
  90  * This sets up the given spl_image which the standard values obtained from
  91  * config options: CONFIG_SYS_MONITOR_LEN, CONFIG_SYS_UBOOT_START,
  92  * CONFIG_SYS_TEXT_BASE.
  93  *
  94  * @spl_image: Image description to set up
  95  */
  96 void spl_set_header_raw_uboot(struct spl_image_info *spl_image);
  97
  98 /**
  99  * spl_parse_image_header() - parse the image header and set up info
 100  *
 101  * This parses the legacy image header information at @header and sets up
 102  * @spl_image according to what is found. If no image header is found, then
 103  * a raw image or bootz is assumed. If CONFIG_SPL_PANIC_ON_RAW_IMAGE is
 104  * enabled, then this causes a panic. If CONFIG_SPL_RAW_IMAGE_SUPPORT is not
 105  * enabled then U-Boot gives up. Otherwise U-Boot sets up the image using
 106  * spl_set_header_raw_uboot(), or possibly the bootz header.
 107  *
 108  * @spl_image: Image description to set up
 109  * @header image header to parse
 110  * @return 0 if a header was correctly parsed, -ve on error
 111  */
 112 int spl_parse_image_header(struct spl_image_info *spl_image,
 113                            const struct image_header *header);
 114
 115 void spl_board_prepare_for_linux(void);
 116 void spl_board_prepare_for_boot(void);
 117 int spl_board_ubi_load_image(u32 boot_device);
 118
 119 /**
 120  * jump_to_image_linux() - Jump to a Linux kernel from SPL
 121  *
 122  * This jumps into a Linux kernel using the information in @spl_image.
 123  *
 124  * @spl_image: Image description to set up
 125  */
 126 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image);
 127
 128 /**
 129  * spl_start_uboot() - Check if SPL should start the kernel or U-Boot
 130  *
 131  * This is called by the various SPL loaders to determine whether the board
 132  * wants to load the kernel or U-Boot. This function should be provided by
 133  * the board.
 134  *
 135  * @return 0 if SPL should start the kernel, 1 if U-Boot must be started
 136  */
 137 int spl_start_uboot(void);
 138
 139 /**
 140  * spl_display_print() - Display a board-specific message in SPL
 141  *
 142  * If CONFIG_SPL_DISPLAY_PRINT is enabled, U-Boot will call this function
 143  * immediately after displaying the SPL console banner ("U-Boot SPL ...").
 144  * This function should be provided by the board.
 145  */
 146 void spl_display_print(void);
 147
 148 /**
 149  * struct spl_boot_device - Describes a boot device used by SPL
 150  *
 151  * @boot_device: A number indicating the BOOT_DEVICE type. There are various
 152  * BOOT_DEVICE... #defines and enums in U-Boot and they are not consistently
 153  * numbered.
 154  * @boot_device_name: Named boot device, or NULL if none.
 155  *
 156  * Note: Additional fields can be added here, bearing in mind that SPL is
 157  * size-sensitive and common fields will be present on all boards. This
 158  * struct can also be used to return additional information about the load
 159  * process if that becomes useful.
 160  */
 161 struct spl_boot_device {
 162         uint boot_device;
 163         const char *boot_device_name;
 164 };
 165
 166 /**
 167  * Holds information about a way of loading an SPL image
 168  *
 169  * @name: User-friendly name for this method (e.g. "MMC")
 170  * @boot_device: Boot device that this loader supports
 171  * @load_image: Function to call to load image
 172  */
 173 struct spl_image_loader {
 174 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 175         const char *name;
 176 #endif
 177         uint boot_device;
 178         /**
 179          * load_image() - Load an SPL image
 180          *
 181          * @spl_image: place to put image information
 182          * @bootdev: describes the boot device to load from
 183          */
 184         int (*load_image)(struct spl_image_info *spl_image,
 185                           struct spl_boot_device *bootdev);
 186 };
 187
 188 /* Declare an SPL image loader */
 189 #define SPL_LOAD_IMAGE(__name)                                  \
 190         ll_entry_declare(struct spl_image_loader, __name, spl_image_loader)
 191
 192 /*
 193  * _priority is the priority of this method, 0 meaning it will be the top
 194  * choice for this device, 9 meaning it is the bottom choice.
 195  * _boot_device is the BOOT_DEVICE_... value
 196  * _method is the load_image function to call
 197  */
 198 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 199 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 200         SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
 201                 .name = _name, \
 202                 .boot_device = _boot_device, \
 203                 .load_image = _method, \
 204         }
 205 #else
 206 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 207         SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
 208                 .boot_device = _boot_device, \
 209                 .load_image = _method, \
 210         }
 211 #endif
 212
 213 /* SPL FAT image functions */
 214 int spl_load_image_fat(struct spl_image_info *spl_image,
 215                        struct blk_desc *block_dev, int partition,
 216                        const char *filename);
 217 int spl_load_image_fat_os(struct spl_image_info *spl_image,
 218                           struct blk_desc *block_dev, int partition);
 219
 220 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image);
 221
 222 /* SPL EXT image functions */
 223 int spl_load_image_ext(struct spl_image_info *spl_image,
 224                        struct blk_desc *block_dev, int partition,
 225                        const char *filename);
 226 int spl_load_image_ext_os(struct spl_image_info *spl_image,
 227                           struct blk_desc *block_dev, int partition);
 228
 229 /**
 230  * spl_early_init() - Set up device tree and driver model in SPL if enabled
 231  *
 232  * Call this function in board_init_f() if you want to use device tree and
 233  * driver model early, before board_init_r() is called.
 234  *
 235  * If this is not called, then driver model will be inactive in SPL's
 236  * board_init_f(), and no device tree will be available.
 237  */
 238 int spl_early_init(void);
 239
 240 /**
 241  * spl_init() - Set up device tree and driver model in SPL if enabled
 242  *
 243  * You can optionally call spl_early_init(), then optionally call spl_init().
 244  * This function will be called from board_init_r() if not called earlier.
 245  *
 246  * Both spl_early_init() and spl_init() perform a similar function except that
 247  * the latter will not set up the malloc() area if
 248  * CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN is enabled, since it is assumed to
 249  * already be done by a calll to spl_relocate_stack_gd() before board_init_r()
 250  * is reached.
 251  *
 252  * This function will be called from board_init_r() if not called earlier.
 253  *
 254  * If this is not called, then driver model will be inactive in SPL's
 255  * board_init_f(), and no device tree will be available.
 256  */
 257 int spl_init(void);
 258
 259 #ifdef CONFIG_SPL_BOARD_INIT
 260 void spl_board_init(void);
 261 #endif
 262
 263 /**
 264  * spl_was_boot_source() - check if U-Boot booted from SPL
 265  *
 266  * This will normally be true, but if U-Boot jumps to second U-Boot, it will
 267  * be false. This should be implemented by board-specific code.
 268  *
 269  * @return true if U-Boot booted from SPL, else false
 270  */
 271 bool spl_was_boot_source(void);
 272
 273 /**
 274  * spl_dfu_cmd- run dfu command with chosen mmc device interface
 275  * @param usb_index - usb controller number
 276  * @param mmc_dev -  mmc device nubmer
 277  *
 278  * @return 0 on success, otherwise error code
 279  */
 280 int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
 281
 282 int spl_mmc_load_image(struct spl_image_info *spl_image,
 283                        struct spl_boot_device *bootdev);
 284
 285 /**
 286  * spl_invoke_atf - boot using an ARM trusted firmware image
 287  */
 288 void spl_invoke_atf(struct spl_image_info *spl_image);
 289
 290 /**
 291  * board_return_to_bootrom - allow for boards to continue with the boot ROM
 292  *
 293  * If a board (e.g. the Rockchip RK3368 boards) provide some
 294  * supporting functionality for SPL in their boot ROM and the SPL
 295  * stage wants to return to the ROM code to continue booting, boards
 296  * can implement 'board_return_to_bootrom'.
 297  */
 298 void board_return_to_bootrom(void);
 299 #endif