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