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_READY ( 6 | (1UL << (BITS_PER_LONG-1))) 33 #define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1))) 34 #define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1))) 35 #define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1))) 36 #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) 37 #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1))) 38 39 typedef unsigned long efi_status_t; 40 typedef u8 efi_bool_t; 41 typedef u16 efi_char16_t; /* UNICODE character */ 42 43 44 typedef struct { 45 u8 b[16]; 46 } efi_guid_t; 47 48 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ 49 ((efi_guid_t) \ 50 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ 51 (b) & 0xff, ((b) >> 8) & 0xff, \ 52 (c) & 0xff, ((c) >> 8) & 0xff, \ 53 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) 54 55 /* 56 * Generic EFI table header 57 */ 58 typedef struct { 59 u64 signature; 60 u32 revision; 61 u32 headersize; 62 u32 crc32; 63 u32 reserved; 64 } efi_table_hdr_t; 65 66 /* 67 * Memory map descriptor: 68 */ 69 70 /* Memory types: */ 71 #define EFI_RESERVED_TYPE 0 72 #define EFI_LOADER_CODE 1 73 #define EFI_LOADER_DATA 2 74 #define EFI_BOOT_SERVICES_CODE 3 75 #define EFI_BOOT_SERVICES_DATA 4 76 #define EFI_RUNTIME_SERVICES_CODE 5 77 #define EFI_RUNTIME_SERVICES_DATA 6 78 #define EFI_CONVENTIONAL_MEMORY 7 79 #define EFI_UNUSABLE_MEMORY 8 80 #define EFI_ACPI_RECLAIM_MEMORY 9 81 #define EFI_ACPI_MEMORY_NVS 10 82 #define EFI_MEMORY_MAPPED_IO 11 83 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 84 #define EFI_PAL_CODE 13 85 #define EFI_MAX_MEMORY_TYPE 14 86 87 /* Attribute values: */ 88 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ 89 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ 90 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ 91 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ 92 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ 93 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ 94 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ 95 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ 96 #define EFI_MEMORY_DESCRIPTOR_VERSION 1 97 98 #define EFI_PAGE_SHIFT 12 99 100 typedef struct { 101 u32 type; 102 u32 pad; 103 u64 phys_addr; 104 u64 virt_addr; 105 u64 num_pages; 106 u64 attribute; 107 } efi_memory_desc_t; 108 109 typedef struct { 110 efi_guid_t guid; 111 u32 headersize; 112 u32 flags; 113 u32 imagesize; 114 } efi_capsule_header_t; 115 116 /* 117 * Allocation types for calls to boottime->allocate_pages. 118 */ 119 #define EFI_ALLOCATE_ANY_PAGES 0 120 #define EFI_ALLOCATE_MAX_ADDRESS 1 121 #define EFI_ALLOCATE_ADDRESS 2 122 #define EFI_MAX_ALLOCATE_TYPE 3 123 124 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg); 125 126 /* 127 * Types and defines for Time Services 128 */ 129 #define EFI_TIME_ADJUST_DAYLIGHT 0x1 130 #define EFI_TIME_IN_DAYLIGHT 0x2 131 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff 132 133 typedef struct { 134 u16 year; 135 u8 month; 136 u8 day; 137 u8 hour; 138 u8 minute; 139 u8 second; 140 u8 pad1; 141 u32 nanosecond; 142 s16 timezone; 143 u8 daylight; 144 u8 pad2; 145 } efi_time_t; 146 147 typedef struct { 148 u32 resolution; 149 u32 accuracy; 150 u8 sets_to_zero; 151 } efi_time_cap_t; 152 153 /* 154 * EFI Boot Services table 155 */ 156 typedef struct { 157 efi_table_hdr_t hdr; 158 void *raise_tpl; 159 void *restore_tpl; 160 void *allocate_pages; 161 void *free_pages; 162 void *get_memory_map; 163 void *allocate_pool; 164 void *free_pool; 165 void *create_event; 166 void *set_timer; 167 void *wait_for_event; 168 void *signal_event; 169 void *close_event; 170 void *check_event; 171 void *install_protocol_interface; 172 void *reinstall_protocol_interface; 173 void *uninstall_protocol_interface; 174 void *handle_protocol; 175 void *__reserved; 176 void *register_protocol_notify; 177 void *locate_handle; 178 void *locate_device_path; 179 void *install_configuration_table; 180 void *load_image; 181 void *start_image; 182 void *exit; 183 void *unload_image; 184 void *exit_boot_services; 185 void *get_next_monotonic_count; 186 void *stall; 187 void *set_watchdog_timer; 188 void *connect_controller; 189 void *disconnect_controller; 190 void *open_protocol; 191 void *close_protocol; 192 void *open_protocol_information; 193 void *protocols_per_handle; 194 void *locate_handle_buffer; 195 void *locate_protocol; 196 void *install_multiple_protocol_interfaces; 197 void *uninstall_multiple_protocol_interfaces; 198 void *calculate_crc32; 199 void *copy_mem; 200 void *set_mem; 201 void *create_event_ex; 202 } efi_boot_services_t; 203 204 typedef enum { 205 EfiPciIoWidthUint8, 206 EfiPciIoWidthUint16, 207 EfiPciIoWidthUint32, 208 EfiPciIoWidthUint64, 209 EfiPciIoWidthFifoUint8, 210 EfiPciIoWidthFifoUint16, 211 EfiPciIoWidthFifoUint32, 212 EfiPciIoWidthFifoUint64, 213 EfiPciIoWidthFillUint8, 214 EfiPciIoWidthFillUint16, 215 EfiPciIoWidthFillUint32, 216 EfiPciIoWidthFillUint64, 217 EfiPciIoWidthMaximum 218 } EFI_PCI_IO_PROTOCOL_WIDTH; 219 220 typedef enum { 221 EfiPciIoAttributeOperationGet, 222 EfiPciIoAttributeOperationSet, 223 EfiPciIoAttributeOperationEnable, 224 EfiPciIoAttributeOperationDisable, 225 EfiPciIoAttributeOperationSupported, 226 EfiPciIoAttributeOperationMaximum 227 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION; 228 229 230 typedef struct { 231 void *read; 232 void *write; 233 } efi_pci_io_protocol_access_t; 234 235 typedef struct { 236 void *poll_mem; 237 void *poll_io; 238 efi_pci_io_protocol_access_t mem; 239 efi_pci_io_protocol_access_t io; 240 efi_pci_io_protocol_access_t pci; 241 void *copy_mem; 242 void *map; 243 void *unmap; 244 void *allocate_buffer; 245 void *free_buffer; 246 void *flush; 247 void *get_location; 248 void *attributes; 249 void *get_bar_attributes; 250 void *set_bar_attributes; 251 uint64_t romsize; 252 void *romimage; 253 } efi_pci_io_protocol; 254 255 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001 256 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002 257 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004 258 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008 259 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010 260 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020 261 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040 262 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080 263 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100 264 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200 265 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400 266 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800 267 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 268 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000 269 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000 270 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000 271 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000 272 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000 273 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000 274 275 /* 276 * Types and defines for EFI ResetSystem 277 */ 278 #define EFI_RESET_COLD 0 279 #define EFI_RESET_WARM 1 280 #define EFI_RESET_SHUTDOWN 2 281 282 /* 283 * EFI Runtime Services table 284 */ 285 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL) 286 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 287 288 typedef struct { 289 efi_table_hdr_t hdr; 290 unsigned long get_time; 291 unsigned long set_time; 292 unsigned long get_wakeup_time; 293 unsigned long set_wakeup_time; 294 unsigned long set_virtual_address_map; 295 unsigned long convert_pointer; 296 unsigned long get_variable; 297 unsigned long get_next_variable; 298 unsigned long set_variable; 299 unsigned long get_next_high_mono_count; 300 unsigned long reset_system; 301 unsigned long update_capsule; 302 unsigned long query_capsule_caps; 303 unsigned long query_variable_info; 304 } efi_runtime_services_t; 305 306 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); 307 typedef efi_status_t efi_set_time_t (efi_time_t *tm); 308 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, 309 efi_time_t *tm); 310 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); 311 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, 312 unsigned long *data_size, void *data); 313 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, 314 efi_guid_t *vendor); 315 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 316 u32 attr, unsigned long data_size, 317 void *data); 318 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count); 319 typedef void efi_reset_system_t (int reset_type, efi_status_t status, 320 unsigned long data_size, efi_char16_t *data); 321 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, 322 unsigned long descriptor_size, 323 u32 descriptor_version, 324 efi_memory_desc_t *virtual_map); 325 typedef efi_status_t efi_query_variable_info_t(u32 attr, 326 u64 *storage_space, 327 u64 *remaining_space, 328 u64 *max_variable_size); 329 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, 330 unsigned long count, 331 unsigned long sg_list); 332 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, 333 unsigned long count, 334 u64 *max_size, 335 int *reset_type); 336 337 /* 338 * EFI Configuration Table and GUID definitions 339 */ 340 #define NULL_GUID \ 341 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ) 342 343 #define MPS_TABLE_GUID \ 344 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) 345 346 #define ACPI_TABLE_GUID \ 347 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) 348 349 #define ACPI_20_TABLE_GUID \ 350 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 ) 351 352 #define SMBIOS_TABLE_GUID \ 353 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) 354 355 #define SAL_SYSTEM_TABLE_GUID \ 356 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) 357 358 #define HCDP_TABLE_GUID \ 359 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 ) 360 361 #define UGA_IO_PROTOCOL_GUID \ 362 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 ) 363 364 #define EFI_GLOBAL_VARIABLE_GUID \ 365 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c ) 366 367 #define UV_SYSTEM_TABLE_GUID \ 368 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 ) 369 370 #define LINUX_EFI_CRASH_GUID \ 371 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 ) 372 373 #define LOADED_IMAGE_PROTOCOL_GUID \ 374 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) 375 376 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \ 377 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a ) 378 379 #define EFI_UGA_PROTOCOL_GUID \ 380 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 ) 381 382 #define EFI_PCI_IO_PROTOCOL_GUID \ 383 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a ) 384 385 #define EFI_FILE_INFO_ID \ 386 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) 387 388 #define EFI_FILE_SYSTEM_GUID \ 389 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) 390 391 typedef struct { 392 efi_guid_t guid; 393 u64 table; 394 } efi_config_table_64_t; 395 396 typedef struct { 397 efi_guid_t guid; 398 u32 table; 399 } efi_config_table_32_t; 400 401 typedef struct { 402 efi_guid_t guid; 403 unsigned long table; 404 } efi_config_table_t; 405 406 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) 407 408 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30)) 409 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20)) 410 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10)) 411 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00)) 412 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10)) 413 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02)) 414 415 typedef struct { 416 efi_table_hdr_t hdr; 417 u64 fw_vendor; /* physical addr of CHAR16 vendor string */ 418 u32 fw_revision; 419 u32 __pad1; 420 u64 con_in_handle; 421 u64 con_in; 422 u64 con_out_handle; 423 u64 con_out; 424 u64 stderr_handle; 425 u64 stderr; 426 u64 runtime; 427 u64 boottime; 428 u32 nr_tables; 429 u32 __pad2; 430 u64 tables; 431 } efi_system_table_64_t; 432 433 typedef struct { 434 efi_table_hdr_t hdr; 435 u32 fw_vendor; /* physical addr of CHAR16 vendor string */ 436 u32 fw_revision; 437 u32 con_in_handle; 438 u32 con_in; 439 u32 con_out_handle; 440 u32 con_out; 441 u32 stderr_handle; 442 u32 stderr; 443 u32 runtime; 444 u32 boottime; 445 u32 nr_tables; 446 u32 tables; 447 } efi_system_table_32_t; 448 449 typedef struct { 450 efi_table_hdr_t hdr; 451 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ 452 u32 fw_revision; 453 unsigned long con_in_handle; 454 unsigned long con_in; 455 unsigned long con_out_handle; 456 unsigned long con_out; 457 unsigned long stderr_handle; 458 unsigned long stderr; 459 efi_runtime_services_t *runtime; 460 efi_boot_services_t *boottime; 461 unsigned long nr_tables; 462 unsigned long tables; 463 } efi_system_table_t; 464 465 struct efi_memory_map { 466 void *phys_map; 467 void *map; 468 void *map_end; 469 int nr_map; 470 unsigned long desc_version; 471 unsigned long desc_size; 472 }; 473 474 typedef struct { 475 u32 revision; 476 void *parent_handle; 477 efi_system_table_t *system_table; 478 void *device_handle; 479 void *file_path; 480 void *reserved; 481 u32 load_options_size; 482 void *load_options; 483 void *image_base; 484 __aligned_u64 image_size; 485 unsigned int image_code_type; 486 unsigned int image_data_type; 487 unsigned long unload; 488 } efi_loaded_image_t; 489 490 typedef struct { 491 u64 revision; 492 void *open_volume; 493 } efi_file_io_interface_t; 494 495 typedef struct { 496 u64 size; 497 u64 file_size; 498 u64 phys_size; 499 efi_time_t create_time; 500 efi_time_t last_access_time; 501 efi_time_t modification_time; 502 __aligned_u64 attribute; 503 efi_char16_t filename[1]; 504 } efi_file_info_t; 505 506 typedef struct { 507 u64 revision; 508 void *open; 509 void *close; 510 void *delete; 511 void *read; 512 void *write; 513 void *get_position; 514 void *set_position; 515 void *get_info; 516 void *set_info; 517 void *flush; 518 } efi_file_handle_t; 519 520 #define EFI_FILE_MODE_READ 0x0000000000000001 521 #define EFI_FILE_MODE_WRITE 0x0000000000000002 522 #define EFI_FILE_MODE_CREATE 0x8000000000000000 523 524 #define EFI_INVALID_TABLE_ADDR (~0UL) 525 526 /* 527 * All runtime access to EFI goes through this structure: 528 */ 529 extern struct efi { 530 efi_system_table_t *systab; /* EFI system table */ 531 unsigned int runtime_version; /* Runtime services version */ 532 unsigned long mps; /* MPS table */ 533 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ 534 unsigned long acpi20; /* ACPI table (ACPI 2.0) */ 535 unsigned long smbios; /* SM BIOS table */ 536 unsigned long sal_systab; /* SAL system table */ 537 unsigned long boot_info; /* boot info table */ 538 unsigned long hcdp; /* HCDP table */ 539 unsigned long uga; /* UGA table */ 540 unsigned long uv_systab; /* UV system table */ 541 efi_get_time_t *get_time; 542 efi_set_time_t *set_time; 543 efi_get_wakeup_time_t *get_wakeup_time; 544 efi_set_wakeup_time_t *set_wakeup_time; 545 efi_get_variable_t *get_variable; 546 efi_get_next_variable_t *get_next_variable; 547 efi_set_variable_t *set_variable; 548 efi_query_variable_info_t *query_variable_info; 549 efi_update_capsule_t *update_capsule; 550 efi_query_capsule_caps_t *query_capsule_caps; 551 efi_get_next_high_mono_count_t *get_next_high_mono_count; 552 efi_reset_system_t *reset_system; 553 efi_set_virtual_address_map_t *set_virtual_address_map; 554 } efi; 555 556 static inline int 557 efi_guidcmp (efi_guid_t left, efi_guid_t right) 558 { 559 return memcmp(&left, &right, sizeof (efi_guid_t)); 560 } 561 562 static inline char * 563 efi_guid_unparse(efi_guid_t *guid, char *out) 564 { 565 sprintf(out, "%pUl", guid->b); 566 return out; 567 } 568 569 extern void efi_init (void); 570 extern void *efi_get_pal_addr (void); 571 extern void efi_map_pal_code (void); 572 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); 573 extern void efi_gettimeofday (struct timespec *ts); 574 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ 575 #ifdef CONFIG_X86 576 extern void efi_late_init(void); 577 extern void efi_free_boot_services(void); 578 #else 579 static inline void efi_late_init(void) {} 580 static inline void efi_free_boot_services(void) {} 581 #endif 582 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr); 583 extern u64 efi_get_iobase (void); 584 extern u32 efi_mem_type (unsigned long phys_addr); 585 extern u64 efi_mem_attributes (unsigned long phys_addr); 586 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size); 587 extern int __init efi_uart_console_only (void); 588 extern void efi_initialize_iomem_resources(struct resource *code_resource, 589 struct resource *data_resource, struct resource *bss_resource); 590 extern unsigned long efi_get_time(void); 591 extern int efi_set_rtc_mmss(unsigned long nowtime); 592 extern void efi_reserve_boot_services(void); 593 extern struct efi_memory_map memmap; 594 595 /** 596 * efi_range_is_wc - check the WC bit on an address range 597 * @start: starting kvirt address 598 * @len: length of range 599 * 600 * Consult the EFI memory map and make sure it's ok to set this range WC. 601 * Returns true or false. 602 */ 603 static inline int efi_range_is_wc(unsigned long start, unsigned long len) 604 { 605 unsigned long i; 606 607 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { 608 unsigned long paddr = __pa(start + i); 609 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC)) 610 return 0; 611 } 612 /* The range checked out */ 613 return 1; 614 } 615 616 #ifdef CONFIG_EFI_PCDP 617 extern int __init efi_setup_pcdp_console(char *); 618 #endif 619 620 /* 621 * We play games with efi_enabled so that the compiler will, if possible, remove 622 * EFI-related code altogether. 623 */ 624 #ifdef CONFIG_EFI 625 # ifdef CONFIG_X86 626 extern int efi_enabled; 627 extern bool efi_64bit; 628 # else 629 # define efi_enabled 1 630 # endif 631 #else 632 # define efi_enabled 0 633 #endif 634 635 /* 636 * Variable Attributes 637 */ 638 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 639 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 640 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 641 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 642 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 643 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 644 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 645 646 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ 647 EFI_VARIABLE_BOOTSERVICE_ACCESS | \ 648 EFI_VARIABLE_RUNTIME_ACCESS | \ 649 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ 650 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ 651 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ 652 EFI_VARIABLE_APPEND_WRITE) 653 /* 654 * The type of search to perform when calling boottime->locate_handle 655 */ 656 #define EFI_LOCATE_ALL_HANDLES 0 657 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1 658 #define EFI_LOCATE_BY_PROTOCOL 2 659 660 /* 661 * EFI Device Path information 662 */ 663 #define EFI_DEV_HW 0x01 664 #define EFI_DEV_PCI 1 665 #define EFI_DEV_PCCARD 2 666 #define EFI_DEV_MEM_MAPPED 3 667 #define EFI_DEV_VENDOR 4 668 #define EFI_DEV_CONTROLLER 5 669 #define EFI_DEV_ACPI 0x02 670 #define EFI_DEV_BASIC_ACPI 1 671 #define EFI_DEV_EXPANDED_ACPI 2 672 #define EFI_DEV_MSG 0x03 673 #define EFI_DEV_MSG_ATAPI 1 674 #define EFI_DEV_MSG_SCSI 2 675 #define EFI_DEV_MSG_FC 3 676 #define EFI_DEV_MSG_1394 4 677 #define EFI_DEV_MSG_USB 5 678 #define EFI_DEV_MSG_USB_CLASS 15 679 #define EFI_DEV_MSG_I20 6 680 #define EFI_DEV_MSG_MAC 11 681 #define EFI_DEV_MSG_IPV4 12 682 #define EFI_DEV_MSG_IPV6 13 683 #define EFI_DEV_MSG_INFINIBAND 9 684 #define EFI_DEV_MSG_UART 14 685 #define EFI_DEV_MSG_VENDOR 10 686 #define EFI_DEV_MEDIA 0x04 687 #define EFI_DEV_MEDIA_HARD_DRIVE 1 688 #define EFI_DEV_MEDIA_CDROM 2 689 #define EFI_DEV_MEDIA_VENDOR 3 690 #define EFI_DEV_MEDIA_FILE 4 691 #define EFI_DEV_MEDIA_PROTOCOL 5 692 #define EFI_DEV_BIOS_BOOT 0x05 693 #define EFI_DEV_END_PATH 0x7F 694 #define EFI_DEV_END_PATH2 0xFF 695 #define EFI_DEV_END_INSTANCE 0x01 696 #define EFI_DEV_END_ENTIRE 0xFF 697 698 struct efi_generic_dev_path { 699 u8 type; 700 u8 sub_type; 701 u16 length; 702 } __attribute ((packed)); 703 704 static inline void memrange_efi_to_native(u64 *addr, u64 *npages) 705 { 706 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); 707 *addr &= PAGE_MASK; 708 } 709 710 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) 711 /* 712 * EFI Variable support. 713 * 714 * Different firmware drivers can expose their EFI-like variables using 715 * the following. 716 */ 717 718 struct efivar_operations { 719 efi_get_variable_t *get_variable; 720 efi_get_next_variable_t *get_next_variable; 721 efi_set_variable_t *set_variable; 722 efi_query_variable_info_t *query_variable_info; 723 }; 724 725 struct efivars { 726 /* 727 * ->lock protects two things: 728 * 1) ->list - adds, removals, reads, writes 729 * 2) ops.[gs]et_variable() calls. 730 * It must not be held when creating sysfs entries or calling kmalloc. 731 * ops.get_next_variable() is only called from register_efivars(), 732 * which is protected by the BKL, so that path is safe. 733 */ 734 spinlock_t lock; 735 struct list_head list; 736 struct kset *kset; 737 struct kobject *kobject; 738 struct bin_attribute *new_var, *del_var; 739 const struct efivar_operations *ops; 740 struct efivar_entry *walk_entry; 741 struct pstore_info efi_pstore_info; 742 }; 743 744 int register_efivars(struct efivars *efivars, 745 const struct efivar_operations *ops, 746 struct kobject *parent_kobj); 747 void unregister_efivars(struct efivars *efivars); 748 749 #endif /* CONFIG_EFI_VARS */ 750 751 #endif /* _LINUX_EFI_H */ 752