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 /* Platform-specific defines */
  11 #include <linux/compiler.h>
  12 #include <asm/spl.h>
  13
  14 /* Value in r0 indicates we booted from U-Boot */
  15 #define UBOOT_NOT_LOADED_FROM_SPL       0x13578642
  16
  17 /* Boot type */
  18 #define MMCSD_MODE_UNDEFINED    0
  19 #define MMCSD_MODE_RAW          1
  20 #define MMCSD_MODE_FS           2
  21 #define MMCSD_MODE_EMMCBOOT     3
  22
  23 struct spl_image_info {
  24         const char *name;
  25         u8 os;
  26         ulong load_addr;
  27         ulong entry_point;
  28         u32 size;
  29         u32 flags;
  30         void *arg;
  31 };
  32
  33 /*
  34  * Information required to load data from a device
  35  *
  36  * @dev: Pointer to the device, e.g. struct mmc *
  37  * @priv: Private data for the device
  38  * @bl_len: Block length for reading in bytes
  39  * @filename: Name of the fit image file.
  40  * @read: Function to call to read from the device
  41  */
  42 struct spl_load_info {
  43         void *dev;
  44         void *priv;
  45         int bl_len;
  46         const char *filename;
  47         ulong (*read)(struct spl_load_info *load, ulong sector, ulong count,
  48                       void *buf);
  49 };
  50
  51 /**
  52  * spl_load_simple_fit() - Loads a fit image from a device.
  53  * @spl_image:  Image description to set up
  54  * @info:       Structure containing the information required to load data.
  55  * @sector:     Sector number where FIT image is located in the device
  56  * @fdt:        Pointer to the copied FIT header.
  57  *
  58  * Reads the FIT image @sector in the device. Loads u-boot image to
  59  * specified load address and copies the dtb to end of u-boot image.
  60  * Returns 0 on success.
  61  */
  62 int spl_load_simple_fit(struct spl_image_info *spl_image,
  63                         struct spl_load_info *info, ulong sector, void *fdt);
  64
  65 #define SPL_COPY_PAYLOAD_ONLY   1
  66
  67 /* SPL common functions */
  68 void preloader_console_init(void);
  69 u32 spl_boot_device(void);
  70 u32 spl_boot_mode(const u32 boot_device);
  71 void spl_set_bd(void);
  72
  73 /**
  74  * spl_set_header_raw_uboot() - Set up a standard SPL image structure
  75  *
  76  * This sets up the given spl_image which the standard values obtained from
  77  * config options: CONFIG_SYS_MONITOR_LEN, CONFIG_SYS_UBOOT_START,
  78  * CONFIG_SYS_TEXT_BASE.
  79  *
  80  * @spl_image: Image description to set up
  81  */
  82 void spl_set_header_raw_uboot(struct spl_image_info *spl_image);
  83
  84 /**
  85  * spl_parse_image_header() - parse the image header and set up info
  86  *
  87  * This parses the legacy image header information at @header and sets up
  88  * @spl_image according to what is found. If no image header is found, then
  89  * a raw image or bootz is assumed. If CONFIG_SPL_PANIC_ON_RAW_IMAGE is
  90  * enabled, then this causes a panic. If CONFIG_SPL_RAW_IMAGE_SUPPORT is not
  91  * enabled then U-Boot gives up. Otherwise U-Boot sets up the image using
  92  * spl_set_header_raw_uboot(), or possibly the bootz header.
  93  *
  94  * @spl_image: Image description to set up
  95  * @header image header to parse
  96  * @return 0 if a header was correctly parsed, -ve on error
  97  */
  98 int spl_parse_image_header(struct spl_image_info *spl_image,
  99                            const struct image_header *header);
 100
 101 void spl_board_prepare_for_linux(void);
 102 void spl_board_prepare_for_boot(void);
 103 int spl_board_ubi_load_image(u32 boot_device);
 104
 105 /**
 106  * jump_to_image_linux() - Jump to a Linux kernel from SPL
 107  *
 108  * This jumps into a Linux kernel using the information in @spl_image.
 109  *
 110  * @spl_image: Image description to set up
 111  */
 112 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image);
 113
 114 /**
 115  * spl_start_uboot() - Check if SPL should start the kernel or U-Boot
 116  *
 117  * This is called by the various SPL loaders to determine whether the board
 118  * wants to load the kernel or U-Boot. This function should be provided by
 119  * the board.
 120  *
 121  * @return 0 if SPL should start the kernel, 1 if U-Boot must be started
 122  */
 123 int spl_start_uboot(void);
 124
 125 /**
 126  * spl_display_print() - Display a board-specific message in SPL
 127  *
 128  * If CONFIG_SPL_DISPLAY_PRINT is enabled, U-Boot will call this function
 129  * immediately after displaying the SPL console banner ("U-Boot SPL ...").
 130  * This function should be provided by the board.
 131  */
 132 void spl_display_print(void);
 133
 134 /**
 135  * struct spl_boot_device - Describes a boot device used by SPL
 136  *
 137  * @boot_device: A number indicating the BOOT_DEVICE type. There are various
 138  * BOOT_DEVICE... #defines and enums in U-Boot and they are not consistently
 139  * numbered.
 140  * @boot_device_name: Named boot device, or NULL if none.
 141  *
 142  * Note: Additional fields can be added here, bearing in mind that SPL is
 143  * size-sensitive and common fields will be present on all boards. This
 144  * struct can also be used to return additional information about the load
 145  * process if that becomes useful.
 146  */
 147 struct spl_boot_device {
 148         uint boot_device;
 149         const char *boot_device_name;
 150 };
 151
 152 /**
 153  * Holds information about a way of loading an SPL image
 154  *
 155  * @name: User-friendly name for this method (e.g. "MMC")
 156  * @boot_device: Boot device that this loader supports
 157  * @load_image: Function to call to load image
 158  */
 159 struct spl_image_loader {
 160 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 161         const char *name;
 162 #endif
 163         uint boot_device;
 164         /**
 165          * load_image() - Load an SPL image
 166          *
 167          * @spl_image: place to put image information
 168          * @bootdev: describes the boot device to load from
 169          */
 170         int (*load_image)(struct spl_image_info *spl_image,
 171                           struct spl_boot_device *bootdev);
 172 };
 173
 174 /* Declare an SPL image loader */
 175 #define SPL_LOAD_IMAGE(__name)                                  \
 176         ll_entry_declare(struct spl_image_loader, __name, spl_image_loader)
 177
 178 /*
 179  * _priority is the priority of this method, 0 meaning it will be the top
 180  * choice for this device, 9 meaning it is the bottom choice.
 181  * _boot_device is the BOOT_DEVICE_... value
 182  * _method is the load_image function to call
 183  */
 184 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 185 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 186         SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
 187                 .name = _name, \
 188                 .boot_device = _boot_device, \
 189                 .load_image = _method, \
 190         }
 191 #else
 192 #define SPL_LOAD_IMAGE_METHOD(_name, _priority, _boot_device, _method) \
 193         SPL_LOAD_IMAGE(_method ## _priority ## _boot_device) = { \
 194                 .boot_device = _boot_device, \
 195                 .load_image = _method, \
 196         }
 197 #endif
 198
 199 /* SPL FAT image functions */
 200 int spl_load_image_fat(struct spl_image_info *spl_image,
 201                        struct blk_desc *block_dev, int partition,
 202                        const char *filename);
 203 int spl_load_image_fat_os(struct spl_image_info *spl_image,
 204                           struct blk_desc *block_dev, int partition);
 205
 206 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image);
 207
 208 /* SPL EXT image functions */
 209 int spl_load_image_ext(struct spl_image_info *spl_image,
 210                        struct blk_desc *block_dev, int partition,
 211                        const char *filename);
 212 int spl_load_image_ext_os(struct spl_image_info *spl_image,
 213                           struct blk_desc *block_dev, int partition);
 214
 215 /**
 216  * spl_early_init() - Set up device tree and driver model in SPL if enabled
 217  *
 218  * Call this function in board_init_f() if you want to use device tree and
 219  * driver model early, before board_init_r() is called.
 220  *
 221  * If this is not called, then driver model will be inactive in SPL's
 222  * board_init_f(), and no device tree will be available.
 223  */
 224 int spl_early_init(void);
 225
 226 /**
 227  * spl_init() - Set up device tree and driver model in SPL if enabled
 228  *
 229  * You can optionally call spl_early_init(), then optionally call spl_init().
 230  * This function will be called from board_init_r() if not called earlier.
 231  *
 232  * Both spl_early_init() and spl_init() perform a similar function except that
 233  * the latter will not set up the malloc() area if
 234  * CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN is enabled, since it is assumed to
 235  * already be done by a calll to spl_relocate_stack_gd() before board_init_r()
 236  * is reached.
 237  *
 238  * This function will be called from board_init_r() if not called earlier.
 239  *
 240  * If this is not called, then driver model will be inactive in SPL's
 241  * board_init_f(), and no device tree will be available.
 242  */
 243 int spl_init(void);
 244
 245 #ifdef CONFIG_SPL_BOARD_INIT
 246 void spl_board_init(void);
 247 #endif
 248
 249 /**
 250  * spl_was_boot_source() - check if U-Boot booted from SPL
 251  *
 252  * This will normally be true, but if U-Boot jumps to second U-Boot, it will
 253  * be false. This should be implemented by board-specific code.
 254  *
 255  * @return true if U-Boot booted from SPL, else false
 256  */
 257 bool spl_was_boot_source(void);
 258
 259 /**
 260  * spl_dfu_cmd- run dfu command with chosen mmc device interface
 261  * @param usb_index - usb controller number
 262  * @param mmc_dev -  mmc device nubmer
 263  *
 264  * @return 0 on success, otherwise error code
 265  */
 266 int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
 267
 268 int spl_mmc_load_image(struct spl_image_info *spl_image,
 269                        struct spl_boot_device *bootdev);
 270
 271 void bl31_entry(void);
 272
 273 /**
 274  * board_return_to_bootrom - allow for boards to continue with the boot ROM
 275  *
 276  * If a board (e.g. the Rockchip RK3368 boards) provide some
 277  * supporting functionality for SPL in their boot ROM and the SPL
 278  * stage wants to return to the ROM code to continue booting, boards
 279  * can implement 'board_return_to_bootrom'.
 280  */
 281 void board_return_to_bootrom(void);
 282 #endif