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