1 /* 2 * Extensible Firmware Interface 3 * Based on 'Extensible Firmware Interface Specification' version 0.9, 4 * April 30, 1999 5 * 6 * Copyright (C) 1999 VA Linux Systems 7 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> 8 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. 9 * David Mosberger-Tang <davidm@hpl.hp.com> 10 * Stephane Eranian <eranian@hpl.hp.com> 11 * 12 * From include/linux/efi.h in kernel 4.1 with some additions/subtractions 13 */ 14 15 #ifndef _EFI_H 16 #define _EFI_H 17 18 #include <linux/linkage.h> 19 #include <linux/string.h> 20 #include <linux/types.h> 21 22 #ifdef CONFIG_EFI_STUB_64BIT 23 /* EFI uses the Microsoft ABI which is not the default for GCC */ 24 #define EFIAPI __attribute__((ms_abi)) 25 #else 26 #define EFIAPI asmlinkage 27 #endif 28 29 struct efi_device_path; 30 31 typedef struct { 32 u8 b[16]; 33 } efi_guid_t; 34 35 #define EFI_BITS_PER_LONG BITS_PER_LONG 36 37 /* 38 * With 64-bit EFI stub, EFI_BITS_PER_LONG has to be 64. EFI_STUB is set 39 * in lib/efi/Makefile, when building the stub. 40 */ 41 #if defined(CONFIG_EFI_STUB_64BIT) && defined(EFI_STUB) 42 #undef EFI_BITS_PER_LONG 43 #define EFI_BITS_PER_LONG 64 44 #endif 45 46 /* Bit mask for EFI status code with error */ 47 #define EFI_ERROR_MASK (1UL << (EFI_BITS_PER_LONG - 1)) 48 /* Status codes returned by EFI protocols */ 49 #define EFI_SUCCESS 0 50 #define EFI_LOAD_ERROR (EFI_ERROR_MASK | 1) 51 #define EFI_INVALID_PARAMETER (EFI_ERROR_MASK | 2) 52 #define EFI_UNSUPPORTED (EFI_ERROR_MASK | 3) 53 #define EFI_BAD_BUFFER_SIZE (EFI_ERROR_MASK | 4) 54 #define EFI_BUFFER_TOO_SMALL (EFI_ERROR_MASK | 5) 55 #define EFI_NOT_READY (EFI_ERROR_MASK | 6) 56 #define EFI_DEVICE_ERROR (EFI_ERROR_MASK | 7) 57 #define EFI_WRITE_PROTECTED (EFI_ERROR_MASK | 8) 58 #define EFI_OUT_OF_RESOURCES (EFI_ERROR_MASK | 9) 59 #define EFI_VOLUME_CORRUPTED (EFI_ERROR_MASK | 10) 60 #define EFI_VOLUME_FULL (EFI_ERROR_MASK | 11) 61 #define EFI_NO_MEDIA (EFI_ERROR_MASK | 12) 62 #define EFI_MEDIA_CHANGED (EFI_ERROR_MASK | 13) 63 #define EFI_NOT_FOUND (EFI_ERROR_MASK | 14) 64 #define EFI_ACCESS_DENIED (EFI_ERROR_MASK | 15) 65 #define EFI_NO_RESPONSE (EFI_ERROR_MASK | 16) 66 #define EFI_NO_MAPPING (EFI_ERROR_MASK | 17) 67 #define EFI_TIMEOUT (EFI_ERROR_MASK | 18) 68 #define EFI_NOT_STARTED (EFI_ERROR_MASK | 19) 69 #define EFI_ALREADY_STARTED (EFI_ERROR_MASK | 20) 70 #define EFI_ABORTED (EFI_ERROR_MASK | 21) 71 #define EFI_ICMP_ERROR (EFI_ERROR_MASK | 22) 72 #define EFI_TFTP_ERROR (EFI_ERROR_MASK | 23) 73 #define EFI_PROTOCOL_ERROR (EFI_ERROR_MASK | 24) 74 #define EFI_INCOMPATIBLE_VERSION (EFI_ERROR_MASK | 25) 75 #define EFI_SECURITY_VIOLATION (EFI_ERROR_MASK | 26) 76 #define EFI_CRC_ERROR (EFI_ERROR_MASK | 27) 77 #define EFI_END_OF_MEDIA (EFI_ERROR_MASK | 28) 78 #define EFI_END_OF_FILE (EFI_ERROR_MASK | 31) 79 #define EFI_INVALID_LANGUAGE (EFI_ERROR_MASK | 32) 80 #define EFI_COMPROMISED_DATA (EFI_ERROR_MASK | 33) 81 #define EFI_IP_ADDRESS_CONFLICT (EFI_ERROR_MASK | 34) 82 #define EFI_HTTP_ERROR (EFI_ERROR_MASK | 35) 83 84 #define EFI_WARN_DELETE_FAILURE 2 85 86 typedef unsigned long efi_status_t; 87 typedef u64 efi_physical_addr_t; 88 typedef u64 efi_virtual_addr_t; 89 typedef void *efi_handle_t; 90 91 #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ 92 ((efi_guid_t) \ 93 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \ 94 ((a) >> 24) & 0xff, \ 95 (b) & 0xff, ((b) >> 8) & 0xff, \ 96 (c) & 0xff, ((c) >> 8) & 0xff, \ 97 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } }) 98 99 /* Generic EFI table header */ 100 struct efi_table_hdr { 101 u64 signature; 102 u32 revision; 103 u32 headersize; 104 u32 crc32; 105 u32 reserved; 106 }; 107 108 /* Enumeration of memory types introduced in UEFI */ 109 enum efi_mem_type { 110 EFI_RESERVED_MEMORY_TYPE, 111 /* 112 * The code portions of a loaded application. 113 * (Note that UEFI OS loaders are UEFI applications.) 114 */ 115 EFI_LOADER_CODE, 116 /* 117 * The data portions of a loaded application and 118 * the default data allocation type used by an application 119 * to allocate pool memory. 120 */ 121 EFI_LOADER_DATA, 122 /* The code portions of a loaded Boot Services Driver */ 123 EFI_BOOT_SERVICES_CODE, 124 /* 125 * The data portions of a loaded Boot Services Driver and 126 * the default data allocation type used by a Boot Services 127 * Driver to allocate pool memory. 128 */ 129 EFI_BOOT_SERVICES_DATA, 130 /* The code portions of a loaded Runtime Services Driver */ 131 EFI_RUNTIME_SERVICES_CODE, 132 /* 133 * The data portions of a loaded Runtime Services Driver and 134 * the default data allocation type used by a Runtime Services 135 * Driver to allocate pool memory. 136 */ 137 EFI_RUNTIME_SERVICES_DATA, 138 /* Free (unallocated) memory */ 139 EFI_CONVENTIONAL_MEMORY, 140 /* Memory in which errors have been detected */ 141 EFI_UNUSABLE_MEMORY, 142 /* Memory that holds the ACPI tables */ 143 EFI_ACPI_RECLAIM_MEMORY, 144 /* Address space reserved for use by the firmware */ 145 EFI_ACPI_MEMORY_NVS, 146 /* 147 * Used by system firmware to request that a memory-mapped IO region 148 * be mapped by the OS to a virtual address so it can be accessed by 149 * EFI runtime services. 150 */ 151 EFI_MMAP_IO, 152 /* 153 * System memory-mapped IO region that is used to translate 154 * memory cycles to IO cycles by the processor. 155 */ 156 EFI_MMAP_IO_PORT, 157 /* 158 * Address space reserved by the firmware for code that is 159 * part of the processor. 160 */ 161 EFI_PAL_CODE, 162 163 EFI_MAX_MEMORY_TYPE, 164 EFI_TABLE_END, /* For efi_build_mem_table() */ 165 }; 166 167 /* Attribute values */ 168 enum { 169 EFI_MEMORY_UC_SHIFT = 0, /* uncached */ 170 EFI_MEMORY_WC_SHIFT = 1, /* write-coalescing */ 171 EFI_MEMORY_WT_SHIFT = 2, /* write-through */ 172 EFI_MEMORY_WB_SHIFT = 3, /* write-back */ 173 EFI_MEMORY_UCE_SHIFT = 4, /* uncached, exported */ 174 EFI_MEMORY_WP_SHIFT = 12, /* write-protect */ 175 EFI_MEMORY_RP_SHIFT = 13, /* read-protect */ 176 EFI_MEMORY_XP_SHIFT = 14, /* execute-protect */ 177 EFI_MEMORY_RUNTIME_SHIFT = 63, /* range requires runtime mapping */ 178 179 EFI_MEMORY_RUNTIME = 1ULL << EFI_MEMORY_RUNTIME_SHIFT, 180 EFI_MEM_DESC_VERSION = 1, 181 }; 182 183 #define EFI_PAGE_SHIFT 12 184 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT) 185 #define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1) 186 187 struct efi_mem_desc { 188 u32 type; 189 u32 reserved; 190 efi_physical_addr_t physical_start; 191 efi_virtual_addr_t virtual_start; 192 u64 num_pages; 193 u64 attribute; 194 }; 195 196 #define EFI_MEMORY_DESCRIPTOR_VERSION 1 197 198 /* Allocation types for calls to boottime->allocate_pages*/ 199 #define EFI_ALLOCATE_ANY_PAGES 0 200 #define EFI_ALLOCATE_MAX_ADDRESS 1 201 #define EFI_ALLOCATE_ADDRESS 2 202 #define EFI_MAX_ALLOCATE_TYPE 3 203 204 /* Types and defines for Time Services */ 205 #define EFI_TIME_ADJUST_DAYLIGHT 0x1 206 #define EFI_TIME_IN_DAYLIGHT 0x2 207 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff 208 209 struct efi_time { 210 u16 year; 211 u8 month; 212 u8 day; 213 u8 hour; 214 u8 minute; 215 u8 second; 216 u8 pad1; 217 u32 nanosecond; 218 s16 timezone; 219 u8 daylight; 220 u8 pad2; 221 }; 222 223 struct efi_time_cap { 224 u32 resolution; 225 u32 accuracy; 226 u8 sets_to_zero; 227 }; 228 229 enum efi_locate_search_type { 230 all_handles, 231 by_register_notify, 232 by_protocol 233 }; 234 235 struct efi_open_protocol_info_entry { 236 efi_handle_t agent_handle; 237 efi_handle_t controller_handle; 238 u32 attributes; 239 u32 open_count; 240 }; 241 242 enum efi_entry_t { 243 EFIET_END, /* Signals this is the last (empty) entry */ 244 EFIET_MEMORY_MAP, 245 246 /* Number of entries */ 247 EFIET_MEMORY_COUNT, 248 }; 249 250 #define EFI_TABLE_VERSION 1 251 252 /** 253 * struct efi_info_hdr - Header for the EFI info table 254 * 255 * @version: EFI_TABLE_VERSION 256 * @hdr_size: Size of this struct in bytes 257 * @total_size: Total size of this header plus following data 258 * @spare: Spare space for expansion 259 */ 260 struct efi_info_hdr { 261 u32 version; 262 u32 hdr_size; 263 u32 total_size; 264 u32 spare[5]; 265 }; 266 267 /** 268 * struct efi_entry_hdr - Header for a table entry 269 * 270 * @type: enum eft_entry_t 271 * @size size of entry bytes excluding header and padding 272 * @addr: address of this entry (0 if it follows the header ) 273 * @link: size of entry including header and padding 274 * @spare1: Spare space for expansion 275 * @spare2: Spare space for expansion 276 */ 277 struct efi_entry_hdr { 278 u32 type; 279 u32 size; 280 u64 addr; 281 u32 link; 282 u32 spare1; 283 u64 spare2; 284 }; 285 286 /** 287 * struct efi_entry_memmap - a memory map table passed to U-Boot 288 * 289 * @version: EFI's memory map table version 290 * @desc_size: EFI's size of each memory descriptor 291 * @spare: Spare space for expansion 292 * @desc: An array of descriptors, each @desc_size bytes apart 293 */ 294 struct efi_entry_memmap { 295 u32 version; 296 u32 desc_size; 297 u64 spare; 298 struct efi_mem_desc desc[]; 299 }; 300 301 static inline struct efi_mem_desc *efi_get_next_mem_desc( 302 struct efi_entry_memmap *map, struct efi_mem_desc *desc) 303 { 304 return (struct efi_mem_desc *)((ulong)desc + map->desc_size); 305 } 306 307 struct efi_priv { 308 efi_handle_t parent_image; 309 struct efi_device_path *device_path; 310 struct efi_system_table *sys_table; 311 struct efi_boot_services *boot; 312 struct efi_runtime_services *run; 313 bool use_pool_for_malloc; 314 unsigned long ram_base; 315 unsigned int image_data_type; 316 struct efi_info_hdr *info; 317 unsigned int info_size; 318 void *next_hdr; 319 }; 320 321 /* Base address of the EFI image */ 322 extern char image_base[]; 323 324 /* Start and end of U-Boot image (for payload) */ 325 extern char _binary_u_boot_bin_start[], _binary_u_boot_bin_end[]; 326 327 /* 328 * Variable Attributes 329 */ 330 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 331 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 332 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 333 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 334 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 335 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 336 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 337 338 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ 339 EFI_VARIABLE_BOOTSERVICE_ACCESS | \ 340 EFI_VARIABLE_RUNTIME_ACCESS | \ 341 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ 342 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ 343 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ 344 EFI_VARIABLE_APPEND_WRITE) 345 346 /** 347 * efi_get_sys_table() - Get access to the main EFI system table 348 * 349 * @return pointer to EFI system table 350 */ 351 352 struct efi_system_table *efi_get_sys_table(void); 353 354 /** 355 * efi_get_ram_base() - Find the base of RAM 356 * 357 * This is used when U-Boot is built as an EFI application. 358 * 359 * @return the base of RAM as known to U-Boot 360 */ 361 unsigned long efi_get_ram_base(void); 362 363 /** 364 * efi_init() - Set up ready for use of EFI boot services 365 * 366 * @priv: Pointer to our private EFI structure to fill in 367 * @banner: Banner to display when starting 368 * @image: The image handle passed to efi_main() 369 * @sys_table: The EFI system table pointer passed to efi_main() 370 */ 371 int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image, 372 struct efi_system_table *sys_table); 373 374 /** 375 * efi_malloc() - Allocate some memory from EFI 376 * 377 * @priv: Pointer to private EFI structure 378 * @size: Number of bytes to allocate 379 * @retp: Return EFI status result 380 * @return pointer to memory allocated, or NULL on error 381 */ 382 void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp); 383 384 /** 385 * efi_free() - Free memory allocated from EFI 386 * 387 * @priv: Pointer to private EFI structure 388 * @ptr: Pointer to memory to free 389 */ 390 void efi_free(struct efi_priv *priv, void *ptr); 391 392 /** 393 * efi_puts() - Write out a string to the EFI console 394 * 395 * @priv: Pointer to private EFI structure 396 * @str: String to write (note this is a ASCII, not unicode) 397 */ 398 void efi_puts(struct efi_priv *priv, const char *str); 399 400 /** 401 * efi_putc() - Write out a character to the EFI console 402 * 403 * @priv: Pointer to private EFI structure 404 * @ch: Character to write (note this is not unicode) 405 */ 406 void efi_putc(struct efi_priv *priv, const char ch); 407 408 /** 409 * efi_info_get() - get an entry from an EFI table 410 * 411 * @type: Entry type to search for 412 * @datap: Returns pointer to entry data 413 * @sizep: Returns pointer to entry size 414 * @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry 415 * of the requested type, -EPROTONOSUPPORT if the table has the wrong version 416 */ 417 int efi_info_get(enum efi_entry_t type, void **datap, int *sizep); 418 419 /** 420 * efi_build_mem_table() - make a sorted copy of the memory table 421 * 422 * @map: Pointer to EFI memory map table 423 * @size: Size of table in bytes 424 * @skip_bs: True to skip boot-time memory and merge it with conventional 425 * memory. This will significantly reduce the number of table 426 * entries. 427 * @return pointer to the new table. It should be freed with free() by the 428 * caller 429 */ 430 void *efi_build_mem_table(struct efi_entry_memmap *map, int size, bool skip_bs); 431 432 #endif /* _LINUX_EFI_H */ 433