1 #ifndef _LINUX_EFI_H 2 #define _LINUX_EFI_H 3 4 /* 5 * Extensible Firmware Interface 6 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999 7 * 8 * Copyright (C) 1999 VA Linux Systems 9 * Copyright (C) 1999 Walt Drummond <[email protected]> 10 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. 11 * David Mosberger-Tang <[email protected]> 12 * Stephane Eranian <[email protected]> 13 */ 14 #include <linux/init.h> 15 #include <linux/string.h> 16 #include <linux/time.h> 17 #include <linux/types.h> 18 #include <linux/proc_fs.h> 19 #include <linux/rtc.h> 20 #include <linux/ioport.h> 21 #include <linux/pfn.h> 22 #include <linux/pstore.h> 23 24 #include <asm/page.h> 25 26 #define EFI_SUCCESS 0 27 #define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1))) 28 #define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1))) 29 #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1))) 30 #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1))) 31 #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1))) 32 #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) 33 34 typedef unsigned long efi_status_t; 35 typedef u8 efi_bool_t; 36 typedef u16 efi_char16_t; /* UNICODE character */ 37 38 39 typedef struct { 40 u8 b[16]; 41 } efi_guid_t; 42 43 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ 44 ((efi_guid_t) \ 45 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ 46 (b) & 0xff, ((b) >> 8) & 0xff, \ 47 (c) & 0xff, ((c) >> 8) & 0xff, \ 48 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) 49 50 /* 51 * Generic EFI table header 52 */ 53 typedef struct { 54 u64 signature; 55 u32 revision; 56 u32 headersize; 57 u32 crc32; 58 u32 reserved; 59 } efi_table_hdr_t; 60 61 /* 62 * Memory map descriptor: 63 */ 64 65 /* Memory types: */ 66 #define EFI_RESERVED_TYPE 0 67 #define EFI_LOADER_CODE 1 68 #define EFI_LOADER_DATA 2 69 #define EFI_BOOT_SERVICES_CODE 3 70 #define EFI_BOOT_SERVICES_DATA 4 71 #define EFI_RUNTIME_SERVICES_CODE 5 72 #define EFI_RUNTIME_SERVICES_DATA 6 73 #define EFI_CONVENTIONAL_MEMORY 7 74 #define EFI_UNUSABLE_MEMORY 8 75 #define EFI_ACPI_RECLAIM_MEMORY 9 76 #define EFI_ACPI_MEMORY_NVS 10 77 #define EFI_MEMORY_MAPPED_IO 11 78 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 79 #define EFI_PAL_CODE 13 80 #define EFI_MAX_MEMORY_TYPE 14 81 82 /* Attribute values: */ 83 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ 84 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ 85 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ 86 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ 87 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ 88 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ 89 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ 90 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ 91 #define EFI_MEMORY_DESCRIPTOR_VERSION 1 92 93 #define EFI_PAGE_SHIFT 12 94 95 typedef struct { 96 u32 type; 97 u32 pad; 98 u64 phys_addr; 99 u64 virt_addr; 100 u64 num_pages; 101 u64 attribute; 102 } efi_memory_desc_t; 103 104 typedef struct { 105 efi_guid_t guid; 106 u32 headersize; 107 u32 flags; 108 u32 imagesize; 109 } efi_capsule_header_t; 110 111 /* 112 * Allocation types for calls to boottime->allocate_pages. 113 */ 114 #define EFI_ALLOCATE_ANY_PAGES 0 115 #define EFI_ALLOCATE_MAX_ADDRESS 1 116 #define EFI_ALLOCATE_ADDRESS 2 117 #define EFI_MAX_ALLOCATE_TYPE 3 118 119 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg); 120 121 /* 122 * Types and defines for Time Services 123 */ 124 #define EFI_TIME_ADJUST_DAYLIGHT 0x1 125 #define EFI_TIME_IN_DAYLIGHT 0x2 126 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff 127 128 typedef struct { 129 u16 year; 130 u8 month; 131 u8 day; 132 u8 hour; 133 u8 minute; 134 u8 second; 135 u8 pad1; 136 u32 nanosecond; 137 s16 timezone; 138 u8 daylight; 139 u8 pad2; 140 } efi_time_t; 141 142 typedef struct { 143 u32 resolution; 144 u32 accuracy; 145 u8 sets_to_zero; 146 } efi_time_cap_t; 147 148 /* 149 * EFI Boot Services table 150 */ 151 typedef struct { 152 efi_table_hdr_t hdr; 153 void *raise_tpl; 154 void *restore_tpl; 155 void *allocate_pages; 156 void *free_pages; 157 void *get_memory_map; 158 void *allocate_pool; 159 void *free_pool; 160 void *create_event; 161 void *set_timer; 162 void *wait_for_event; 163 void *signal_event; 164 void *close_event; 165 void *check_event; 166 void *install_protocol_interface; 167 void *reinstall_protocol_interface; 168 void *uninstall_protocol_interface; 169 void *handle_protocol; 170 void *__reserved; 171 void *register_protocol_notify; 172 void *locate_handle; 173 void *locate_device_path; 174 void *install_configuration_table; 175 void *load_image; 176 void *start_image; 177 void *exit; 178 void *unload_image; 179 void *exit_boot_services; 180 void *get_next_monotonic_count; 181 void *stall; 182 void *set_watchdog_timer; 183 void *connect_controller; 184 void *disconnect_controller; 185 void *open_protocol; 186 void *close_protocol; 187 void *open_protocol_information; 188 void *protocols_per_handle; 189 void *locate_handle_buffer; 190 void *locate_protocol; 191 void *install_multiple_protocol_interfaces; 192 void *uninstall_multiple_protocol_interfaces; 193 void *calculate_crc32; 194 void *copy_mem; 195 void *set_mem; 196 void *create_event_ex; 197 } efi_boot_services_t; 198 199 /* 200 * Types and defines for EFI ResetSystem 201 */ 202 #define EFI_RESET_COLD 0 203 #define EFI_RESET_WARM 1 204 #define EFI_RESET_SHUTDOWN 2 205 206 /* 207 * EFI Runtime Services table 208 */ 209 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL) 210 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 211 212 typedef struct { 213 efi_table_hdr_t hdr; 214 unsigned long get_time; 215 unsigned long set_time; 216 unsigned long get_wakeup_time; 217 unsigned long set_wakeup_time; 218 unsigned long set_virtual_address_map; 219 unsigned long convert_pointer; 220 unsigned long get_variable; 221 unsigned long get_next_variable; 222 unsigned long set_variable; 223 unsigned long get_next_high_mono_count; 224 unsigned long reset_system; 225 unsigned long update_capsule; 226 unsigned long query_capsule_caps; 227 unsigned long query_variable_info; 228 } efi_runtime_services_t; 229 230 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); 231 typedef efi_status_t efi_set_time_t (efi_time_t *tm); 232 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, 233 efi_time_t *tm); 234 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); 235 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, 236 unsigned long *data_size, void *data); 237 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, 238 efi_guid_t *vendor); 239 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 240 u32 attr, unsigned long data_size, 241 void *data); 242 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count); 243 typedef void efi_reset_system_t (int reset_type, efi_status_t status, 244 unsigned long data_size, efi_char16_t *data); 245 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, 246 unsigned long descriptor_size, 247 u32 descriptor_version, 248 efi_memory_desc_t *virtual_map); 249 typedef efi_status_t efi_query_variable_info_t(u32 attr, 250 u64 *storage_space, 251 u64 *remaining_space, 252 u64 *max_variable_size); 253 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, 254 unsigned long count, 255 unsigned long sg_list); 256 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, 257 unsigned long count, 258 u64 *max_size, 259 int *reset_type); 260 261 /* 262 * EFI Configuration Table and GUID definitions 263 */ 264 #define NULL_GUID \ 265 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ) 266 267 #define MPS_TABLE_GUID \ 268 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) 269 270 #define ACPI_TABLE_GUID \ 271 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) 272 273 #define ACPI_20_TABLE_GUID \ 274 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 ) 275 276 #define SMBIOS_TABLE_GUID \ 277 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) 278 279 #define SAL_SYSTEM_TABLE_GUID \ 280 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) 281 282 #define HCDP_TABLE_GUID \ 283 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 ) 284 285 #define UGA_IO_PROTOCOL_GUID \ 286 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 ) 287 288 #define EFI_GLOBAL_VARIABLE_GUID \ 289 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c ) 290 291 #define UV_SYSTEM_TABLE_GUID \ 292 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 ) 293 294 #define LINUX_EFI_CRASH_GUID \ 295 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 ) 296 297 #define LOADED_IMAGE_PROTOCOL_GUID \ 298 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) 299 300 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \ 301 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a ) 302 303 #define EFI_UGA_PROTOCOL_GUID \ 304 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 ) 305 306 #define EFI_PCI_IO_PROTOCOL_GUID \ 307 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a ) 308 309 #define EFI_FILE_INFO_ID \ 310 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) 311 312 #define EFI_FILE_SYSTEM_GUID \ 313 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) 314 315 typedef struct { 316 efi_guid_t guid; 317 u64 table; 318 } efi_config_table_64_t; 319 320 typedef struct { 321 efi_guid_t guid; 322 u32 table; 323 } efi_config_table_32_t; 324 325 typedef struct { 326 efi_guid_t guid; 327 unsigned long table; 328 } efi_config_table_t; 329 330 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) 331 332 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30)) 333 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20)) 334 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10)) 335 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00)) 336 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10)) 337 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02)) 338 339 typedef struct { 340 efi_table_hdr_t hdr; 341 u64 fw_vendor; /* physical addr of CHAR16 vendor string */ 342 u32 fw_revision; 343 u32 __pad1; 344 u64 con_in_handle; 345 u64 con_in; 346 u64 con_out_handle; 347 u64 con_out; 348 u64 stderr_handle; 349 u64 stderr; 350 u64 runtime; 351 u64 boottime; 352 u32 nr_tables; 353 u32 __pad2; 354 u64 tables; 355 } efi_system_table_64_t; 356 357 typedef struct { 358 efi_table_hdr_t hdr; 359 u32 fw_vendor; /* physical addr of CHAR16 vendor string */ 360 u32 fw_revision; 361 u32 con_in_handle; 362 u32 con_in; 363 u32 con_out_handle; 364 u32 con_out; 365 u32 stderr_handle; 366 u32 stderr; 367 u32 runtime; 368 u32 boottime; 369 u32 nr_tables; 370 u32 tables; 371 } efi_system_table_32_t; 372 373 typedef struct { 374 efi_table_hdr_t hdr; 375 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ 376 u32 fw_revision; 377 unsigned long con_in_handle; 378 unsigned long con_in; 379 unsigned long con_out_handle; 380 unsigned long con_out; 381 unsigned long stderr_handle; 382 unsigned long stderr; 383 efi_runtime_services_t *runtime; 384 efi_boot_services_t *boottime; 385 unsigned long nr_tables; 386 unsigned long tables; 387 } efi_system_table_t; 388 389 struct efi_memory_map { 390 void *phys_map; 391 void *map; 392 void *map_end; 393 int nr_map; 394 unsigned long desc_version; 395 unsigned long desc_size; 396 }; 397 398 typedef struct { 399 u32 revision; 400 void *parent_handle; 401 efi_system_table_t *system_table; 402 void *device_handle; 403 void *file_path; 404 void *reserved; 405 u32 load_options_size; 406 void *load_options; 407 void *image_base; 408 __aligned_u64 image_size; 409 unsigned int image_code_type; 410 unsigned int image_data_type; 411 unsigned long unload; 412 } efi_loaded_image_t; 413 414 typedef struct { 415 u64 revision; 416 void *open_volume; 417 } efi_file_io_interface_t; 418 419 typedef struct { 420 u64 size; 421 u64 file_size; 422 u64 phys_size; 423 efi_time_t create_time; 424 efi_time_t last_access_time; 425 efi_time_t modification_time; 426 __aligned_u64 attribute; 427 efi_char16_t filename[1]; 428 } efi_file_info_t; 429 430 typedef struct { 431 u64 revision; 432 void *open; 433 void *close; 434 void *delete; 435 void *read; 436 void *write; 437 void *get_position; 438 void *set_position; 439 void *get_info; 440 void *set_info; 441 void *flush; 442 } efi_file_handle_t; 443 444 #define EFI_FILE_MODE_READ 0x0000000000000001 445 #define EFI_FILE_MODE_WRITE 0x0000000000000002 446 #define EFI_FILE_MODE_CREATE 0x8000000000000000 447 448 #define EFI_INVALID_TABLE_ADDR (~0UL) 449 450 /* 451 * All runtime access to EFI goes through this structure: 452 */ 453 extern struct efi { 454 efi_system_table_t *systab; /* EFI system table */ 455 unsigned int runtime_version; /* Runtime services version */ 456 unsigned long mps; /* MPS table */ 457 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ 458 unsigned long acpi20; /* ACPI table (ACPI 2.0) */ 459 unsigned long smbios; /* SM BIOS table */ 460 unsigned long sal_systab; /* SAL system table */ 461 unsigned long boot_info; /* boot info table */ 462 unsigned long hcdp; /* HCDP table */ 463 unsigned long uga; /* UGA table */ 464 unsigned long uv_systab; /* UV system table */ 465 efi_get_time_t *get_time; 466 efi_set_time_t *set_time; 467 efi_get_wakeup_time_t *get_wakeup_time; 468 efi_set_wakeup_time_t *set_wakeup_time; 469 efi_get_variable_t *get_variable; 470 efi_get_next_variable_t *get_next_variable; 471 efi_set_variable_t *set_variable; 472 efi_query_variable_info_t *query_variable_info; 473 efi_update_capsule_t *update_capsule; 474 efi_query_capsule_caps_t *query_capsule_caps; 475 efi_get_next_high_mono_count_t *get_next_high_mono_count; 476 efi_reset_system_t *reset_system; 477 efi_set_virtual_address_map_t *set_virtual_address_map; 478 } efi; 479 480 static inline int 481 efi_guidcmp (efi_guid_t left, efi_guid_t right) 482 { 483 return memcmp(&left, &right, sizeof (efi_guid_t)); 484 } 485 486 static inline char * 487 efi_guid_unparse(efi_guid_t *guid, char *out) 488 { 489 sprintf(out, "%pUl", guid->b); 490 return out; 491 } 492 493 extern void efi_init (void); 494 extern void *efi_get_pal_addr (void); 495 extern void efi_map_pal_code (void); 496 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); 497 extern void efi_gettimeofday (struct timespec *ts); 498 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ 499 #ifdef CONFIG_X86 500 extern void efi_late_init(void); 501 extern void efi_free_boot_services(void); 502 #else 503 static inline void efi_late_init(void) {} 504 static inline void efi_free_boot_services(void) {} 505 #endif 506 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr); 507 extern u64 efi_get_iobase (void); 508 extern u32 efi_mem_type (unsigned long phys_addr); 509 extern u64 efi_mem_attributes (unsigned long phys_addr); 510 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size); 511 extern int __init efi_uart_console_only (void); 512 extern void efi_initialize_iomem_resources(struct resource *code_resource, 513 struct resource *data_resource, struct resource *bss_resource); 514 extern unsigned long efi_get_time(void); 515 extern int efi_set_rtc_mmss(unsigned long nowtime); 516 extern void efi_reserve_boot_services(void); 517 extern struct efi_memory_map memmap; 518 519 /** 520 * efi_range_is_wc - check the WC bit on an address range 521 * @start: starting kvirt address 522 * @len: length of range 523 * 524 * Consult the EFI memory map and make sure it's ok to set this range WC. 525 * Returns true or false. 526 */ 527 static inline int efi_range_is_wc(unsigned long start, unsigned long len) 528 { 529 unsigned long i; 530 531 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { 532 unsigned long paddr = __pa(start + i); 533 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC)) 534 return 0; 535 } 536 /* The range checked out */ 537 return 1; 538 } 539 540 #ifdef CONFIG_EFI_PCDP 541 extern int __init efi_setup_pcdp_console(char *); 542 #endif 543 544 /* 545 * We play games with efi_enabled so that the compiler will, if possible, remove 546 * EFI-related code altogether. 547 */ 548 #ifdef CONFIG_EFI 549 # ifdef CONFIG_X86 550 extern int efi_enabled; 551 extern bool efi_64bit; 552 # else 553 # define efi_enabled 1 554 # endif 555 #else 556 # define efi_enabled 0 557 #endif 558 559 /* 560 * Variable Attributes 561 */ 562 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 563 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 564 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 565 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 566 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 567 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 568 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 569 570 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ 571 EFI_VARIABLE_BOOTSERVICE_ACCESS | \ 572 EFI_VARIABLE_RUNTIME_ACCESS | \ 573 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ 574 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ 575 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ 576 EFI_VARIABLE_APPEND_WRITE) 577 /* 578 * The type of search to perform when calling boottime->locate_handle 579 */ 580 #define EFI_LOCATE_ALL_HANDLES 0 581 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1 582 #define EFI_LOCATE_BY_PROTOCOL 2 583 584 /* 585 * EFI Device Path information 586 */ 587 #define EFI_DEV_HW 0x01 588 #define EFI_DEV_PCI 1 589 #define EFI_DEV_PCCARD 2 590 #define EFI_DEV_MEM_MAPPED 3 591 #define EFI_DEV_VENDOR 4 592 #define EFI_DEV_CONTROLLER 5 593 #define EFI_DEV_ACPI 0x02 594 #define EFI_DEV_BASIC_ACPI 1 595 #define EFI_DEV_EXPANDED_ACPI 2 596 #define EFI_DEV_MSG 0x03 597 #define EFI_DEV_MSG_ATAPI 1 598 #define EFI_DEV_MSG_SCSI 2 599 #define EFI_DEV_MSG_FC 3 600 #define EFI_DEV_MSG_1394 4 601 #define EFI_DEV_MSG_USB 5 602 #define EFI_DEV_MSG_USB_CLASS 15 603 #define EFI_DEV_MSG_I20 6 604 #define EFI_DEV_MSG_MAC 11 605 #define EFI_DEV_MSG_IPV4 12 606 #define EFI_DEV_MSG_IPV6 13 607 #define EFI_DEV_MSG_INFINIBAND 9 608 #define EFI_DEV_MSG_UART 14 609 #define EFI_DEV_MSG_VENDOR 10 610 #define EFI_DEV_MEDIA 0x04 611 #define EFI_DEV_MEDIA_HARD_DRIVE 1 612 #define EFI_DEV_MEDIA_CDROM 2 613 #define EFI_DEV_MEDIA_VENDOR 3 614 #define EFI_DEV_MEDIA_FILE 4 615 #define EFI_DEV_MEDIA_PROTOCOL 5 616 #define EFI_DEV_BIOS_BOOT 0x05 617 #define EFI_DEV_END_PATH 0x7F 618 #define EFI_DEV_END_PATH2 0xFF 619 #define EFI_DEV_END_INSTANCE 0x01 620 #define EFI_DEV_END_ENTIRE 0xFF 621 622 struct efi_generic_dev_path { 623 u8 type; 624 u8 sub_type; 625 u16 length; 626 } __attribute ((packed)); 627 628 static inline void memrange_efi_to_native(u64 *addr, u64 *npages) 629 { 630 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); 631 *addr &= PAGE_MASK; 632 } 633 634 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) 635 /* 636 * EFI Variable support. 637 * 638 * Different firmware drivers can expose their EFI-like variables using 639 * the following. 640 */ 641 642 struct efivar_operations { 643 efi_get_variable_t *get_variable; 644 efi_get_next_variable_t *get_next_variable; 645 efi_set_variable_t *set_variable; 646 }; 647 648 struct efivars { 649 /* 650 * ->lock protects two things: 651 * 1) ->list - adds, removals, reads, writes 652 * 2) ops.[gs]et_variable() calls. 653 * It must not be held when creating sysfs entries or calling kmalloc. 654 * ops.get_next_variable() is only called from register_efivars(), 655 * which is protected by the BKL, so that path is safe. 656 */ 657 spinlock_t lock; 658 struct list_head list; 659 struct kset *kset; 660 struct bin_attribute *new_var, *del_var; 661 const struct efivar_operations *ops; 662 struct efivar_entry *walk_entry; 663 struct pstore_info efi_pstore_info; 664 }; 665 666 int register_efivars(struct efivars *efivars, 667 const struct efivar_operations *ops, 668 struct kobject *parent_kobj); 669 void unregister_efivars(struct efivars *efivars); 670 671 #endif /* CONFIG_EFI_VARS */ 672 673 #endif /* _LINUX_EFI_H */ 674