1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_EFI_H 3 #define _LINUX_EFI_H 4 5 /* 6 * Extensible Firmware Interface 7 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999 8 * 9 * Copyright (C) 1999 VA Linux Systems 10 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> 11 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. 12 * David Mosberger-Tang <davidm@hpl.hp.com> 13 * Stephane Eranian <eranian@hpl.hp.com> 14 */ 15 #include <linux/init.h> 16 #include <linux/string.h> 17 #include <linux/time.h> 18 #include <linux/types.h> 19 #include <linux/proc_fs.h> 20 #include <linux/rtc.h> 21 #include <linux/ioport.h> 22 #include <linux/pfn.h> 23 #include <linux/pstore.h> 24 #include <linux/range.h> 25 #include <linux/reboot.h> 26 #include <linux/uuid.h> 27 #include <linux/screen_info.h> 28 29 #include <asm/page.h> 30 31 #define EFI_SUCCESS 0 32 #define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1))) 33 #define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1))) 34 #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1))) 35 #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1))) 36 #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1))) 37 #define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1))) 38 #define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1))) 39 #define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1))) 40 #define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1))) 41 #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) 42 #define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1))) 43 #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1))) 44 45 typedef unsigned long efi_status_t; 46 typedef u8 efi_bool_t; 47 typedef u16 efi_char16_t; /* UNICODE character */ 48 typedef u64 efi_physical_addr_t; 49 typedef void *efi_handle_t; 50 51 #if defined(CONFIG_X86_64) 52 #define __efiapi __attribute__((ms_abi)) 53 #elif defined(CONFIG_X86_32) 54 #define __efiapi __attribute__((regparm(0))) 55 #else 56 #define __efiapi 57 #endif 58 59 #define efi_get_handle_at(array, idx) \ 60 (efi_is_native() ? (array)[idx] \ 61 : (efi_handle_t)(unsigned long)((u32 *)(array))[idx]) 62 63 #define efi_get_handle_num(size) \ 64 ((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32))) 65 66 #define for_each_efi_handle(handle, array, size, i) \ 67 for (i = 0; \ 68 i < efi_get_handle_num(size) && \ 69 ((handle = efi_get_handle_at((array), i)) || true); \ 70 i++) 71 72 /* 73 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as 74 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment 75 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM), 76 * this means that firmware services invoked by the kernel may assume that 77 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that 78 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits. 79 * 80 * Note that the UEFI spec as well as some comments in the EDK2 code base 81 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be 82 * a mistake, given that no code seems to exist that actually enforces that 83 * or relies on it. 84 */ 85 typedef guid_t efi_guid_t __aligned(__alignof__(u32)); 86 87 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ 88 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) 89 90 /* 91 * Generic EFI table header 92 */ 93 typedef struct { 94 u64 signature; 95 u32 revision; 96 u32 headersize; 97 u32 crc32; 98 u32 reserved; 99 } efi_table_hdr_t; 100 101 /* 102 * Memory map descriptor: 103 */ 104 105 /* Memory types: */ 106 #define EFI_RESERVED_TYPE 0 107 #define EFI_LOADER_CODE 1 108 #define EFI_LOADER_DATA 2 109 #define EFI_BOOT_SERVICES_CODE 3 110 #define EFI_BOOT_SERVICES_DATA 4 111 #define EFI_RUNTIME_SERVICES_CODE 5 112 #define EFI_RUNTIME_SERVICES_DATA 6 113 #define EFI_CONVENTIONAL_MEMORY 7 114 #define EFI_UNUSABLE_MEMORY 8 115 #define EFI_ACPI_RECLAIM_MEMORY 9 116 #define EFI_ACPI_MEMORY_NVS 10 117 #define EFI_MEMORY_MAPPED_IO 11 118 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 119 #define EFI_PAL_CODE 13 120 #define EFI_PERSISTENT_MEMORY 14 121 #define EFI_MAX_MEMORY_TYPE 15 122 123 /* Attribute values: */ 124 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ 125 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ 126 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ 127 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ 128 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */ 129 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ 130 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ 131 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ 132 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */ 133 #define EFI_MEMORY_MORE_RELIABLE \ 134 ((u64)0x0000000000010000ULL) /* higher reliability */ 135 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ 136 #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */ 137 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ 138 #define EFI_MEMORY_DESCRIPTOR_VERSION 1 139 140 #define EFI_PAGE_SHIFT 12 141 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT) 142 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT) 143 144 typedef struct { 145 u32 type; 146 u32 pad; 147 u64 phys_addr; 148 u64 virt_addr; 149 u64 num_pages; 150 u64 attribute; 151 } efi_memory_desc_t; 152 153 typedef struct { 154 efi_guid_t guid; 155 u32 headersize; 156 u32 flags; 157 u32 imagesize; 158 } efi_capsule_header_t; 159 160 struct efi_boot_memmap { 161 efi_memory_desc_t **map; 162 unsigned long *map_size; 163 unsigned long *desc_size; 164 u32 *desc_ver; 165 unsigned long *key_ptr; 166 unsigned long *buff_size; 167 }; 168 169 /* 170 * EFI capsule flags 171 */ 172 #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000 173 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000 174 #define EFI_CAPSULE_INITIATE_RESET 0x00040000 175 176 struct capsule_info { 177 efi_capsule_header_t header; 178 efi_capsule_header_t *capsule; 179 int reset_type; 180 long index; 181 size_t count; 182 size_t total_size; 183 struct page **pages; 184 phys_addr_t *phys; 185 size_t page_bytes_remain; 186 }; 187 188 int __efi_capsule_setup_info(struct capsule_info *cap_info); 189 190 /* 191 * Allocation types for calls to boottime->allocate_pages. 192 */ 193 #define EFI_ALLOCATE_ANY_PAGES 0 194 #define EFI_ALLOCATE_MAX_ADDRESS 1 195 #define EFI_ALLOCATE_ADDRESS 2 196 #define EFI_MAX_ALLOCATE_TYPE 3 197 198 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg); 199 200 /* 201 * Types and defines for Time Services 202 */ 203 #define EFI_TIME_ADJUST_DAYLIGHT 0x1 204 #define EFI_TIME_IN_DAYLIGHT 0x2 205 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff 206 207 typedef struct { 208 u16 year; 209 u8 month; 210 u8 day; 211 u8 hour; 212 u8 minute; 213 u8 second; 214 u8 pad1; 215 u32 nanosecond; 216 s16 timezone; 217 u8 daylight; 218 u8 pad2; 219 } efi_time_t; 220 221 typedef struct { 222 u32 resolution; 223 u32 accuracy; 224 u8 sets_to_zero; 225 } efi_time_cap_t; 226 227 typedef struct { 228 efi_table_hdr_t hdr; 229 u32 raise_tpl; 230 u32 restore_tpl; 231 u32 allocate_pages; 232 u32 free_pages; 233 u32 get_memory_map; 234 u32 allocate_pool; 235 u32 free_pool; 236 u32 create_event; 237 u32 set_timer; 238 u32 wait_for_event; 239 u32 signal_event; 240 u32 close_event; 241 u32 check_event; 242 u32 install_protocol_interface; 243 u32 reinstall_protocol_interface; 244 u32 uninstall_protocol_interface; 245 u32 handle_protocol; 246 u32 __reserved; 247 u32 register_protocol_notify; 248 u32 locate_handle; 249 u32 locate_device_path; 250 u32 install_configuration_table; 251 u32 load_image; 252 u32 start_image; 253 u32 exit; 254 u32 unload_image; 255 u32 exit_boot_services; 256 u32 get_next_monotonic_count; 257 u32 stall; 258 u32 set_watchdog_timer; 259 u32 connect_controller; 260 u32 disconnect_controller; 261 u32 open_protocol; 262 u32 close_protocol; 263 u32 open_protocol_information; 264 u32 protocols_per_handle; 265 u32 locate_handle_buffer; 266 u32 locate_protocol; 267 u32 install_multiple_protocol_interfaces; 268 u32 uninstall_multiple_protocol_interfaces; 269 u32 calculate_crc32; 270 u32 copy_mem; 271 u32 set_mem; 272 u32 create_event_ex; 273 } __packed efi_boot_services_32_t; 274 275 /* 276 * EFI Boot Services table 277 */ 278 typedef union { 279 struct { 280 efi_table_hdr_t hdr; 281 void *raise_tpl; 282 void *restore_tpl; 283 efi_status_t (__efiapi *allocate_pages)(int, int, unsigned long, 284 efi_physical_addr_t *); 285 efi_status_t (__efiapi *free_pages)(efi_physical_addr_t, 286 unsigned long); 287 efi_status_t (__efiapi *get_memory_map)(unsigned long *, void *, 288 unsigned long *, 289 unsigned long *, u32 *); 290 efi_status_t (__efiapi *allocate_pool)(int, unsigned long, 291 void **); 292 efi_status_t (__efiapi *free_pool)(void *); 293 void *create_event; 294 void *set_timer; 295 void *wait_for_event; 296 void *signal_event; 297 void *close_event; 298 void *check_event; 299 void *install_protocol_interface; 300 void *reinstall_protocol_interface; 301 void *uninstall_protocol_interface; 302 efi_status_t (__efiapi *handle_protocol)(efi_handle_t, 303 efi_guid_t *, void **); 304 void *__reserved; 305 void *register_protocol_notify; 306 efi_status_t (__efiapi *locate_handle)(int, efi_guid_t *, 307 void *, unsigned long *, 308 efi_handle_t *); 309 void *locate_device_path; 310 efi_status_t (__efiapi *install_configuration_table)(efi_guid_t *, 311 void *); 312 void *load_image; 313 void *start_image; 314 void *exit; 315 void *unload_image; 316 efi_status_t (__efiapi *exit_boot_services)(efi_handle_t, 317 unsigned long); 318 void *get_next_monotonic_count; 319 void *stall; 320 void *set_watchdog_timer; 321 void *connect_controller; 322 efi_status_t (__efiapi *disconnect_controller)(efi_handle_t, 323 efi_handle_t, 324 efi_handle_t); 325 void *open_protocol; 326 void *close_protocol; 327 void *open_protocol_information; 328 void *protocols_per_handle; 329 void *locate_handle_buffer; 330 efi_status_t (__efiapi *locate_protocol)(efi_guid_t *, void *, 331 void **); 332 void *install_multiple_protocol_interfaces; 333 void *uninstall_multiple_protocol_interfaces; 334 void *calculate_crc32; 335 void *copy_mem; 336 void *set_mem; 337 void *create_event_ex; 338 }; 339 efi_boot_services_32_t mixed_mode; 340 } efi_boot_services_t; 341 342 typedef enum { 343 EfiPciIoWidthUint8, 344 EfiPciIoWidthUint16, 345 EfiPciIoWidthUint32, 346 EfiPciIoWidthUint64, 347 EfiPciIoWidthFifoUint8, 348 EfiPciIoWidthFifoUint16, 349 EfiPciIoWidthFifoUint32, 350 EfiPciIoWidthFifoUint64, 351 EfiPciIoWidthFillUint8, 352 EfiPciIoWidthFillUint16, 353 EfiPciIoWidthFillUint32, 354 EfiPciIoWidthFillUint64, 355 EfiPciIoWidthMaximum 356 } EFI_PCI_IO_PROTOCOL_WIDTH; 357 358 typedef enum { 359 EfiPciIoAttributeOperationGet, 360 EfiPciIoAttributeOperationSet, 361 EfiPciIoAttributeOperationEnable, 362 EfiPciIoAttributeOperationDisable, 363 EfiPciIoAttributeOperationSupported, 364 EfiPciIoAttributeOperationMaximum 365 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION; 366 367 typedef struct { 368 u32 read; 369 u32 write; 370 } efi_pci_io_protocol_access_32_t; 371 372 typedef union efi_pci_io_protocol efi_pci_io_protocol_t; 373 374 typedef 375 efi_status_t (__efiapi *efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *, 376 EFI_PCI_IO_PROTOCOL_WIDTH, 377 u32 offset, 378 unsigned long count, 379 void *buffer); 380 381 typedef struct { 382 void *read; 383 void *write; 384 } efi_pci_io_protocol_access_t; 385 386 typedef struct { 387 efi_pci_io_protocol_cfg_t read; 388 efi_pci_io_protocol_cfg_t write; 389 } efi_pci_io_protocol_config_access_t; 390 391 union efi_pci_io_protocol { 392 struct { 393 void *poll_mem; 394 void *poll_io; 395 efi_pci_io_protocol_access_t mem; 396 efi_pci_io_protocol_access_t io; 397 efi_pci_io_protocol_config_access_t pci; 398 void *copy_mem; 399 void *map; 400 void *unmap; 401 void *allocate_buffer; 402 void *free_buffer; 403 void *flush; 404 efi_status_t (__efiapi *get_location)(efi_pci_io_protocol_t *, 405 unsigned long *segment_nr, 406 unsigned long *bus_nr, 407 unsigned long *device_nr, 408 unsigned long *func_nr); 409 void *attributes; 410 void *get_bar_attributes; 411 void *set_bar_attributes; 412 uint64_t romsize; 413 void *romimage; 414 }; 415 struct { 416 u32 poll_mem; 417 u32 poll_io; 418 efi_pci_io_protocol_access_32_t mem; 419 efi_pci_io_protocol_access_32_t io; 420 efi_pci_io_protocol_access_32_t pci; 421 u32 copy_mem; 422 u32 map; 423 u32 unmap; 424 u32 allocate_buffer; 425 u32 free_buffer; 426 u32 flush; 427 u32 get_location; 428 u32 attributes; 429 u32 get_bar_attributes; 430 u32 set_bar_attributes; 431 u64 romsize; 432 u32 romimage; 433 } mixed_mode; 434 }; 435 436 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001 437 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002 438 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004 439 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008 440 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010 441 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020 442 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040 443 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080 444 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100 445 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200 446 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400 447 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800 448 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 449 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000 450 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000 451 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000 452 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000 453 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000 454 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000 455 456 struct efi_dev_path; 457 458 typedef union apple_properties_protocol apple_properties_protocol_t; 459 460 union apple_properties_protocol { 461 struct { 462 unsigned long version; 463 efi_status_t (__efiapi *get)(apple_properties_protocol_t *, 464 struct efi_dev_path *, 465 efi_char16_t *, void *, u32 *); 466 efi_status_t (__efiapi *set)(apple_properties_protocol_t *, 467 struct efi_dev_path *, 468 efi_char16_t *, void *, u32); 469 efi_status_t (__efiapi *del)(apple_properties_protocol_t *, 470 struct efi_dev_path *, 471 efi_char16_t *); 472 efi_status_t (__efiapi *get_all)(apple_properties_protocol_t *, 473 void *buffer, u32 *); 474 }; 475 struct { 476 u32 version; 477 u32 get; 478 u32 set; 479 u32 del; 480 u32 get_all; 481 } mixed_mode; 482 }; 483 484 typedef u32 efi_tcg2_event_log_format; 485 486 typedef union efi_tcg2_protocol efi_tcg2_protocol_t; 487 488 union efi_tcg2_protocol { 489 struct { 490 void *get_capability; 491 efi_status_t (__efiapi *get_event_log)(efi_handle_t, 492 efi_tcg2_event_log_format, 493 efi_physical_addr_t *, 494 efi_physical_addr_t *, 495 efi_bool_t *); 496 void *hash_log_extend_event; 497 void *submit_command; 498 void *get_active_pcr_banks; 499 void *set_active_pcr_banks; 500 void *get_result_of_set_active_pcr_banks; 501 }; 502 struct { 503 u32 get_capability; 504 u32 get_event_log; 505 u32 hash_log_extend_event; 506 u32 submit_command; 507 u32 get_active_pcr_banks; 508 u32 set_active_pcr_banks; 509 u32 get_result_of_set_active_pcr_banks; 510 } mixed_mode; 511 }; 512 513 /* 514 * Types and defines for EFI ResetSystem 515 */ 516 #define EFI_RESET_COLD 0 517 #define EFI_RESET_WARM 1 518 #define EFI_RESET_SHUTDOWN 2 519 520 /* 521 * EFI Runtime Services table 522 */ 523 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL) 524 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 525 526 typedef struct { 527 efi_table_hdr_t hdr; 528 u32 get_time; 529 u32 set_time; 530 u32 get_wakeup_time; 531 u32 set_wakeup_time; 532 u32 set_virtual_address_map; 533 u32 convert_pointer; 534 u32 get_variable; 535 u32 get_next_variable; 536 u32 set_variable; 537 u32 get_next_high_mono_count; 538 u32 reset_system; 539 u32 update_capsule; 540 u32 query_capsule_caps; 541 u32 query_variable_info; 542 } efi_runtime_services_32_t; 543 544 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); 545 typedef efi_status_t efi_set_time_t (efi_time_t *tm); 546 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, 547 efi_time_t *tm); 548 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); 549 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, 550 unsigned long *data_size, void *data); 551 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, 552 efi_guid_t *vendor); 553 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 554 u32 attr, unsigned long data_size, 555 void *data); 556 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count); 557 typedef void efi_reset_system_t (int reset_type, efi_status_t status, 558 unsigned long data_size, efi_char16_t *data); 559 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, 560 unsigned long descriptor_size, 561 u32 descriptor_version, 562 efi_memory_desc_t *virtual_map); 563 typedef efi_status_t efi_query_variable_info_t(u32 attr, 564 u64 *storage_space, 565 u64 *remaining_space, 566 u64 *max_variable_size); 567 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, 568 unsigned long count, 569 unsigned long sg_list); 570 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, 571 unsigned long count, 572 u64 *max_size, 573 int *reset_type); 574 typedef efi_status_t efi_query_variable_store_t(u32 attributes, 575 unsigned long size, 576 bool nonblocking); 577 578 typedef union { 579 struct { 580 efi_table_hdr_t hdr; 581 efi_get_time_t __efiapi *get_time; 582 efi_set_time_t __efiapi *set_time; 583 efi_get_wakeup_time_t __efiapi *get_wakeup_time; 584 efi_set_wakeup_time_t __efiapi *set_wakeup_time; 585 efi_set_virtual_address_map_t __efiapi *set_virtual_address_map; 586 void *convert_pointer; 587 efi_get_variable_t __efiapi *get_variable; 588 efi_get_next_variable_t __efiapi *get_next_variable; 589 efi_set_variable_t __efiapi *set_variable; 590 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count; 591 efi_reset_system_t __efiapi *reset_system; 592 efi_update_capsule_t __efiapi *update_capsule; 593 efi_query_capsule_caps_t __efiapi *query_capsule_caps; 594 efi_query_variable_info_t __efiapi *query_variable_info; 595 }; 596 efi_runtime_services_32_t mixed_mode; 597 } efi_runtime_services_t; 598 599 void efi_native_runtime_setup(void); 600 601 /* 602 * EFI Configuration Table and GUID definitions 603 * 604 * These are all defined in a single line to make them easier to 605 * grep for and to see them at a glance - while still having a 606 * similar structure to the definitions in the spec. 607 * 608 * Here's how they are structured: 609 * 610 * GUID: 12345678-1234-1234-1234-123456789012 611 * Spec: 612 * #define EFI_SOME_PROTOCOL_GUID \ 613 * {0x12345678,0x1234,0x1234,\ 614 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}} 615 * Here: 616 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12) 617 * ^ tabs ^extra space 618 * 619 * Note that the 'extra space' separates the values at the same place 620 * where the UEFI SPEC breaks the line. 621 */ 622 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00) 623 #define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 624 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 625 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81) 626 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 627 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94) 628 #define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 629 #define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98) 630 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2) 631 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) 632 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93) 633 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0) 634 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 635 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a) 636 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39) 637 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a) 638 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 639 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80) 640 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) 641 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0) 642 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5) 643 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44) 644 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61) 645 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20) 646 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) 647 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0) 648 #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) 649 650 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f) 651 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23) 652 653 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28) 654 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72) 655 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed) 656 657 /* 658 * This GUID is used to pass to the kernel proper the struct screen_info 659 * structure that was populated by the stub based on the GOP protocol instance 660 * associated with ConOut 661 */ 662 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95) 663 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f) 664 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b) 665 #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa) 666 #define LINUX_EFI_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25) 667 #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2) 668 669 /* OEM GUIDs */ 670 #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55) 671 672 typedef struct { 673 efi_guid_t guid; 674 u64 table; 675 } efi_config_table_64_t; 676 677 typedef struct { 678 efi_guid_t guid; 679 u32 table; 680 } efi_config_table_32_t; 681 682 typedef union { 683 struct { 684 efi_guid_t guid; 685 void *table; 686 }; 687 efi_config_table_32_t mixed_mode; 688 } efi_config_table_t; 689 690 typedef struct { 691 efi_guid_t guid; 692 const char *name; 693 unsigned long *ptr; 694 } efi_config_table_type_t; 695 696 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) 697 698 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30)) 699 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20)) 700 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10)) 701 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00)) 702 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10)) 703 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02)) 704 705 typedef struct { 706 efi_table_hdr_t hdr; 707 u64 fw_vendor; /* physical addr of CHAR16 vendor string */ 708 u32 fw_revision; 709 u32 __pad1; 710 u64 con_in_handle; 711 u64 con_in; 712 u64 con_out_handle; 713 u64 con_out; 714 u64 stderr_handle; 715 u64 stderr; 716 u64 runtime; 717 u64 boottime; 718 u32 nr_tables; 719 u32 __pad2; 720 u64 tables; 721 } efi_system_table_64_t; 722 723 typedef struct { 724 efi_table_hdr_t hdr; 725 u32 fw_vendor; /* physical addr of CHAR16 vendor string */ 726 u32 fw_revision; 727 u32 con_in_handle; 728 u32 con_in; 729 u32 con_out_handle; 730 u32 con_out; 731 u32 stderr_handle; 732 u32 stderr; 733 u32 runtime; 734 u32 boottime; 735 u32 nr_tables; 736 u32 tables; 737 } efi_system_table_32_t; 738 739 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t; 740 741 typedef union { 742 struct { 743 efi_table_hdr_t hdr; 744 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ 745 u32 fw_revision; 746 unsigned long con_in_handle; 747 unsigned long con_in; 748 unsigned long con_out_handle; 749 efi_simple_text_output_protocol_t *con_out; 750 unsigned long stderr_handle; 751 unsigned long stderr; 752 efi_runtime_services_t *runtime; 753 efi_boot_services_t *boottime; 754 unsigned long nr_tables; 755 unsigned long tables; 756 }; 757 efi_system_table_32_t mixed_mode; 758 } efi_system_table_t; 759 760 /* 761 * Architecture independent structure for describing a memory map for the 762 * benefit of efi_memmap_init_early(), and for passing context between 763 * efi_memmap_alloc() and efi_memmap_install(). 764 */ 765 struct efi_memory_map_data { 766 phys_addr_t phys_map; 767 unsigned long size; 768 unsigned long desc_version; 769 unsigned long desc_size; 770 unsigned long flags; 771 }; 772 773 struct efi_memory_map { 774 phys_addr_t phys_map; 775 void *map; 776 void *map_end; 777 int nr_map; 778 unsigned long desc_version; 779 unsigned long desc_size; 780 #define EFI_MEMMAP_LATE (1UL << 0) 781 #define EFI_MEMMAP_MEMBLOCK (1UL << 1) 782 #define EFI_MEMMAP_SLAB (1UL << 2) 783 unsigned long flags; 784 }; 785 786 struct efi_mem_range { 787 struct range range; 788 u64 attribute; 789 }; 790 791 struct efi_fdt_params { 792 u64 system_table; 793 u64 mmap; 794 u32 mmap_size; 795 u32 desc_size; 796 u32 desc_ver; 797 }; 798 799 typedef struct { 800 u32 revision; 801 efi_handle_t parent_handle; 802 efi_system_table_t *system_table; 803 efi_handle_t device_handle; 804 void *file_path; 805 void *reserved; 806 u32 load_options_size; 807 void *load_options; 808 void *image_base; 809 __aligned_u64 image_size; 810 unsigned int image_code_type; 811 unsigned int image_data_type; 812 efi_status_t ( __efiapi *unload)(efi_handle_t image_handle); 813 } efi_loaded_image_t; 814 815 typedef struct { 816 u64 size; 817 u64 file_size; 818 u64 phys_size; 819 efi_time_t create_time; 820 efi_time_t last_access_time; 821 efi_time_t modification_time; 822 __aligned_u64 attribute; 823 efi_char16_t filename[1]; 824 } efi_file_info_t; 825 826 typedef struct efi_file_handle efi_file_handle_t; 827 828 struct efi_file_handle { 829 u64 revision; 830 efi_status_t (__efiapi *open)(efi_file_handle_t *, 831 efi_file_handle_t **, 832 efi_char16_t *, u64, u64); 833 efi_status_t (__efiapi *close)(efi_file_handle_t *); 834 void *delete; 835 efi_status_t (__efiapi *read)(efi_file_handle_t *, 836 unsigned long *, void *); 837 void *write; 838 void *get_position; 839 void *set_position; 840 efi_status_t (__efiapi *get_info)(efi_file_handle_t *, 841 efi_guid_t *, unsigned long *, 842 void *); 843 void *set_info; 844 void *flush; 845 }; 846 847 typedef struct efi_file_io_interface efi_file_io_interface_t; 848 849 struct efi_file_io_interface { 850 u64 revision; 851 int (__efiapi *open_volume)(efi_file_io_interface_t *, 852 efi_file_handle_t **); 853 }; 854 855 #define EFI_FILE_MODE_READ 0x0000000000000001 856 #define EFI_FILE_MODE_WRITE 0x0000000000000002 857 #define EFI_FILE_MODE_CREATE 0x8000000000000000 858 859 typedef struct { 860 u32 version; 861 u32 length; 862 u64 memory_protection_attribute; 863 } efi_properties_table_t; 864 865 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000 866 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1 867 868 #define EFI_INVALID_TABLE_ADDR (~0UL) 869 870 typedef struct { 871 u32 version; 872 u32 num_entries; 873 u32 desc_size; 874 u32 reserved; 875 efi_memory_desc_t entry[0]; 876 } efi_memory_attributes_table_t; 877 878 typedef struct { 879 efi_guid_t signature_owner; 880 u8 signature_data[]; 881 } efi_signature_data_t; 882 883 typedef struct { 884 efi_guid_t signature_type; 885 u32 signature_list_size; 886 u32 signature_header_size; 887 u32 signature_size; 888 u8 signature_header[]; 889 /* efi_signature_data_t signatures[][] */ 890 } efi_signature_list_t; 891 892 typedef u8 efi_sha256_hash_t[32]; 893 894 typedef struct { 895 efi_sha256_hash_t to_be_signed_hash; 896 efi_time_t time_of_revocation; 897 } efi_cert_x509_sha256_t; 898 899 /* 900 * All runtime access to EFI goes through this structure: 901 */ 902 extern struct efi { 903 efi_system_table_t *systab; /* EFI system table */ 904 unsigned int runtime_version; /* Runtime services version */ 905 unsigned long mps; /* MPS table */ 906 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ 907 unsigned long acpi20; /* ACPI table (ACPI 2.0) */ 908 unsigned long smbios; /* SMBIOS table (32 bit entry point) */ 909 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */ 910 unsigned long boot_info; /* boot info table */ 911 unsigned long hcdp; /* HCDP table */ 912 unsigned long uga; /* UGA table */ 913 unsigned long fw_vendor; /* fw_vendor */ 914 unsigned long runtime; /* runtime table */ 915 unsigned long config_table; /* config tables */ 916 unsigned long esrt; /* ESRT table */ 917 unsigned long properties_table; /* properties table */ 918 unsigned long mem_attr_table; /* memory attributes table */ 919 unsigned long rng_seed; /* UEFI firmware random seed */ 920 unsigned long tpm_log; /* TPM2 Event Log table */ 921 unsigned long tpm_final_log; /* TPM2 Final Events Log table */ 922 unsigned long mem_reserve; /* Linux EFI memreserve table */ 923 efi_get_time_t *get_time; 924 efi_set_time_t *set_time; 925 efi_get_wakeup_time_t *get_wakeup_time; 926 efi_set_wakeup_time_t *set_wakeup_time; 927 efi_get_variable_t *get_variable; 928 efi_get_next_variable_t *get_next_variable; 929 efi_set_variable_t *set_variable; 930 efi_set_variable_t *set_variable_nonblocking; 931 efi_query_variable_info_t *query_variable_info; 932 efi_query_variable_info_t *query_variable_info_nonblocking; 933 efi_update_capsule_t *update_capsule; 934 efi_query_capsule_caps_t *query_capsule_caps; 935 efi_get_next_high_mono_count_t *get_next_high_mono_count; 936 efi_reset_system_t *reset_system; 937 struct efi_memory_map memmap; 938 unsigned long flags; 939 } efi; 940 941 extern struct mm_struct efi_mm; 942 943 static inline int 944 efi_guidcmp (efi_guid_t left, efi_guid_t right) 945 { 946 return memcmp(&left, &right, sizeof (efi_guid_t)); 947 } 948 949 static inline char * 950 efi_guid_to_str(efi_guid_t *guid, char *out) 951 { 952 sprintf(out, "%pUl", guid->b); 953 return out; 954 } 955 956 extern void efi_init (void); 957 extern void *efi_get_pal_addr (void); 958 extern void efi_map_pal_code (void); 959 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); 960 extern void efi_gettimeofday (struct timespec64 *ts); 961 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ 962 #ifdef CONFIG_X86 963 extern efi_status_t efi_query_variable_store(u32 attributes, 964 unsigned long size, 965 bool nonblocking); 966 #else 967 968 static inline efi_status_t efi_query_variable_store(u32 attributes, 969 unsigned long size, 970 bool nonblocking) 971 { 972 return EFI_SUCCESS; 973 } 974 #endif 975 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr); 976 977 extern int __init efi_memmap_alloc(unsigned int num_entries, 978 struct efi_memory_map_data *data); 979 extern void __efi_memmap_free(u64 phys, unsigned long size, 980 unsigned long flags); 981 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data); 982 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size); 983 extern void __init efi_memmap_unmap(void); 984 extern int __init efi_memmap_install(struct efi_memory_map_data *data); 985 extern int __init efi_memmap_split_count(efi_memory_desc_t *md, 986 struct range *range); 987 extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap, 988 void *buf, struct efi_mem_range *mem); 989 990 extern int efi_config_init(efi_config_table_type_t *arch_tables); 991 #ifdef CONFIG_EFI_ESRT 992 extern void __init efi_esrt_init(void); 993 #else 994 static inline void efi_esrt_init(void) { } 995 #endif 996 extern int efi_config_parse_tables(void *config_tables, int count, int sz, 997 efi_config_table_type_t *arch_tables); 998 extern u64 efi_get_iobase (void); 999 extern int efi_mem_type(unsigned long phys_addr); 1000 extern u64 efi_mem_attributes (unsigned long phys_addr); 1001 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size); 1002 extern int __init efi_uart_console_only (void); 1003 extern u64 efi_mem_desc_end(efi_memory_desc_t *md); 1004 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md); 1005 extern void efi_mem_reserve(phys_addr_t addr, u64 size); 1006 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size); 1007 extern void efi_initialize_iomem_resources(struct resource *code_resource, 1008 struct resource *data_resource, struct resource *bss_resource); 1009 extern int efi_get_fdt_params(struct efi_fdt_params *params); 1010 extern struct kobject *efi_kobj; 1011 1012 extern int efi_reboot_quirk_mode; 1013 extern bool efi_poweroff_required(void); 1014 1015 #ifdef CONFIG_EFI_FAKE_MEMMAP 1016 extern void __init efi_fake_memmap(void); 1017 #else 1018 static inline void efi_fake_memmap(void) { } 1019 #endif 1020 1021 /* 1022 * efi_memattr_perm_setter - arch specific callback function passed into 1023 * efi_memattr_apply_permissions() that updates the 1024 * mapping permissions described by the second 1025 * argument in the page tables referred to by the 1026 * first argument. 1027 */ 1028 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *); 1029 1030 extern int efi_memattr_init(void); 1031 extern int efi_memattr_apply_permissions(struct mm_struct *mm, 1032 efi_memattr_perm_setter fn); 1033 1034 /* 1035 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor 1036 * @map: the start of efi memmap 1037 * @desc_size: the size of space for each EFI memmap descriptor 1038 * @n: the index of efi memmap descriptor 1039 * 1040 * EFI boot service provides the GetMemoryMap() function to get a copy of the 1041 * current memory map which is an array of memory descriptors, each of 1042 * which describes a contiguous block of memory. It also gets the size of the 1043 * map, and the size of each descriptor, etc. 1044 * 1045 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of 1046 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t), 1047 * since efi_memory_memdesc_t may be extended in the future. Thus the OS 1048 * MUST use the returned size of the descriptor to find the start of each 1049 * efi_memory_memdesc_t in the memory map array. This should only be used 1050 * during bootup since for_each_efi_memory_desc_xxx() is available after the 1051 * kernel initializes the EFI subsystem to set up struct efi_memory_map. 1052 */ 1053 #define efi_early_memdesc_ptr(map, desc_size, n) \ 1054 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size))) 1055 1056 /* Iterate through an efi_memory_map */ 1057 #define for_each_efi_memory_desc_in_map(m, md) \ 1058 for ((md) = (m)->map; \ 1059 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \ 1060 (md) = (void *)(md) + (m)->desc_size) 1061 1062 /** 1063 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap 1064 * @md: the efi_memory_desc_t * iterator 1065 * 1066 * Once the loop finishes @md must not be accessed. 1067 */ 1068 #define for_each_efi_memory_desc(md) \ 1069 for_each_efi_memory_desc_in_map(&efi.memmap, md) 1070 1071 /* 1072 * Format an EFI memory descriptor's type and attributes to a user-provided 1073 * character buffer, as per snprintf(), and return the buffer. 1074 */ 1075 char * __init efi_md_typeattr_format(char *buf, size_t size, 1076 const efi_memory_desc_t *md); 1077 1078 1079 typedef void (*efi_element_handler_t)(const char *source, 1080 const void *element_data, 1081 size_t element_size); 1082 extern int __init parse_efi_signature_list( 1083 const char *source, 1084 const void *data, size_t size, 1085 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *)); 1086 1087 /** 1088 * efi_range_is_wc - check the WC bit on an address range 1089 * @start: starting kvirt address 1090 * @len: length of range 1091 * 1092 * Consult the EFI memory map and make sure it's ok to set this range WC. 1093 * Returns true or false. 1094 */ 1095 static inline int efi_range_is_wc(unsigned long start, unsigned long len) 1096 { 1097 unsigned long i; 1098 1099 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { 1100 unsigned long paddr = __pa(start + i); 1101 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC)) 1102 return 0; 1103 } 1104 /* The range checked out */ 1105 return 1; 1106 } 1107 1108 #ifdef CONFIG_EFI_PCDP 1109 extern int __init efi_setup_pcdp_console(char *); 1110 #endif 1111 1112 /* 1113 * We play games with efi_enabled so that the compiler will, if 1114 * possible, remove EFI-related code altogether. 1115 */ 1116 #define EFI_BOOT 0 /* Were we booted from EFI? */ 1117 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */ 1118 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */ 1119 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */ 1120 #define EFI_64BIT 5 /* Is the firmware 64-bit? */ 1121 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */ 1122 #define EFI_ARCH_1 7 /* First arch-specific bit */ 1123 #define EFI_DBG 8 /* Print additional debug info at runtime */ 1124 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */ 1125 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */ 1126 #define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */ 1127 1128 #ifdef CONFIG_EFI 1129 /* 1130 * Test whether the above EFI_* bits are enabled. 1131 */ 1132 static inline bool efi_enabled(int feature) 1133 { 1134 return test_bit(feature, &efi.flags) != 0; 1135 } 1136 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused); 1137 1138 bool __pure __efi_soft_reserve_enabled(void); 1139 1140 static inline bool __pure efi_soft_reserve_enabled(void) 1141 { 1142 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE) 1143 && __efi_soft_reserve_enabled(); 1144 } 1145 #else 1146 static inline bool efi_enabled(int feature) 1147 { 1148 return false; 1149 } 1150 static inline void 1151 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {} 1152 1153 static inline bool 1154 efi_capsule_pending(int *reset_type) 1155 { 1156 return false; 1157 } 1158 1159 static inline bool efi_soft_reserve_enabled(void) 1160 { 1161 return false; 1162 } 1163 #endif 1164 1165 extern int efi_status_to_err(efi_status_t status); 1166 1167 /* 1168 * Variable Attributes 1169 */ 1170 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 1171 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 1172 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 1173 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 1174 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 1175 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 1176 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 1177 1178 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ 1179 EFI_VARIABLE_BOOTSERVICE_ACCESS | \ 1180 EFI_VARIABLE_RUNTIME_ACCESS | \ 1181 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ 1182 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ 1183 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ 1184 EFI_VARIABLE_APPEND_WRITE) 1185 /* 1186 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")) 1187 * not including trailing NUL 1188 */ 1189 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN 1190 1191 /* 1192 * The type of search to perform when calling boottime->locate_handle 1193 */ 1194 #define EFI_LOCATE_ALL_HANDLES 0 1195 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1 1196 #define EFI_LOCATE_BY_PROTOCOL 2 1197 1198 /* 1199 * EFI Device Path information 1200 */ 1201 #define EFI_DEV_HW 0x01 1202 #define EFI_DEV_PCI 1 1203 #define EFI_DEV_PCCARD 2 1204 #define EFI_DEV_MEM_MAPPED 3 1205 #define EFI_DEV_VENDOR 4 1206 #define EFI_DEV_CONTROLLER 5 1207 #define EFI_DEV_ACPI 0x02 1208 #define EFI_DEV_BASIC_ACPI 1 1209 #define EFI_DEV_EXPANDED_ACPI 2 1210 #define EFI_DEV_MSG 0x03 1211 #define EFI_DEV_MSG_ATAPI 1 1212 #define EFI_DEV_MSG_SCSI 2 1213 #define EFI_DEV_MSG_FC 3 1214 #define EFI_DEV_MSG_1394 4 1215 #define EFI_DEV_MSG_USB 5 1216 #define EFI_DEV_MSG_USB_CLASS 15 1217 #define EFI_DEV_MSG_I20 6 1218 #define EFI_DEV_MSG_MAC 11 1219 #define EFI_DEV_MSG_IPV4 12 1220 #define EFI_DEV_MSG_IPV6 13 1221 #define EFI_DEV_MSG_INFINIBAND 9 1222 #define EFI_DEV_MSG_UART 14 1223 #define EFI_DEV_MSG_VENDOR 10 1224 #define EFI_DEV_MEDIA 0x04 1225 #define EFI_DEV_MEDIA_HARD_DRIVE 1 1226 #define EFI_DEV_MEDIA_CDROM 2 1227 #define EFI_DEV_MEDIA_VENDOR 3 1228 #define EFI_DEV_MEDIA_FILE 4 1229 #define EFI_DEV_MEDIA_PROTOCOL 5 1230 #define EFI_DEV_BIOS_BOOT 0x05 1231 #define EFI_DEV_END_PATH 0x7F 1232 #define EFI_DEV_END_PATH2 0xFF 1233 #define EFI_DEV_END_INSTANCE 0x01 1234 #define EFI_DEV_END_ENTIRE 0xFF 1235 1236 struct efi_generic_dev_path { 1237 u8 type; 1238 u8 sub_type; 1239 u16 length; 1240 } __attribute ((packed)); 1241 1242 struct efi_dev_path { 1243 u8 type; /* can be replaced with unnamed */ 1244 u8 sub_type; /* struct efi_generic_dev_path; */ 1245 u16 length; /* once we've moved to -std=c11 */ 1246 union { 1247 struct { 1248 u32 hid; 1249 u32 uid; 1250 } acpi; 1251 struct { 1252 u8 fn; 1253 u8 dev; 1254 } pci; 1255 }; 1256 } __attribute ((packed)); 1257 1258 #if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER) 1259 struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len); 1260 #endif 1261 1262 static inline void memrange_efi_to_native(u64 *addr, u64 *npages) 1263 { 1264 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); 1265 *addr &= PAGE_MASK; 1266 } 1267 1268 /* 1269 * EFI Variable support. 1270 * 1271 * Different firmware drivers can expose their EFI-like variables using 1272 * the following. 1273 */ 1274 1275 struct efivar_operations { 1276 efi_get_variable_t *get_variable; 1277 efi_get_next_variable_t *get_next_variable; 1278 efi_set_variable_t *set_variable; 1279 efi_set_variable_t *set_variable_nonblocking; 1280 efi_query_variable_store_t *query_variable_store; 1281 }; 1282 1283 struct efivars { 1284 struct kset *kset; 1285 struct kobject *kobject; 1286 const struct efivar_operations *ops; 1287 }; 1288 1289 /* 1290 * The maximum size of VariableName + Data = 1024 1291 * Therefore, it's reasonable to save that much 1292 * space in each part of the structure, 1293 * and we use a page for reading/writing. 1294 */ 1295 1296 #define EFI_VAR_NAME_LEN 1024 1297 1298 struct efi_variable { 1299 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)]; 1300 efi_guid_t VendorGuid; 1301 unsigned long DataSize; 1302 __u8 Data[1024]; 1303 efi_status_t Status; 1304 __u32 Attributes; 1305 } __attribute__((packed)); 1306 1307 struct efivar_entry { 1308 struct efi_variable var; 1309 struct list_head list; 1310 struct kobject kobj; 1311 bool scanning; 1312 bool deleting; 1313 }; 1314 1315 union efi_simple_text_output_protocol { 1316 struct { 1317 void *reset; 1318 efi_status_t (__efiapi *output_string)(efi_simple_text_output_protocol_t *, 1319 efi_char16_t *); 1320 void *test_string; 1321 }; 1322 struct { 1323 u32 reset; 1324 u32 output_string; 1325 u32 test_string; 1326 } mixed_mode; 1327 }; 1328 1329 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0 1330 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1 1331 #define PIXEL_BIT_MASK 2 1332 #define PIXEL_BLT_ONLY 3 1333 #define PIXEL_FORMAT_MAX 4 1334 1335 typedef struct { 1336 u32 red_mask; 1337 u32 green_mask; 1338 u32 blue_mask; 1339 u32 reserved_mask; 1340 } efi_pixel_bitmask_t; 1341 1342 typedef struct { 1343 u32 version; 1344 u32 horizontal_resolution; 1345 u32 vertical_resolution; 1346 int pixel_format; 1347 efi_pixel_bitmask_t pixel_information; 1348 u32 pixels_per_scan_line; 1349 } efi_graphics_output_mode_info_t; 1350 1351 typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t; 1352 1353 union efi_graphics_output_protocol_mode { 1354 struct { 1355 u32 max_mode; 1356 u32 mode; 1357 efi_graphics_output_mode_info_t *info; 1358 unsigned long size_of_info; 1359 efi_physical_addr_t frame_buffer_base; 1360 unsigned long frame_buffer_size; 1361 }; 1362 struct { 1363 u32 max_mode; 1364 u32 mode; 1365 u32 info; 1366 u32 size_of_info; 1367 u64 frame_buffer_base; 1368 u32 frame_buffer_size; 1369 } mixed_mode; 1370 }; 1371 1372 typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t; 1373 1374 union efi_graphics_output_protocol { 1375 struct { 1376 void *query_mode; 1377 void *set_mode; 1378 void *blt; 1379 efi_graphics_output_protocol_mode_t *mode; 1380 }; 1381 struct { 1382 u32 query_mode; 1383 u32 set_mode; 1384 u32 blt; 1385 u32 mode; 1386 } mixed_mode; 1387 }; 1388 1389 extern struct list_head efivar_sysfs_list; 1390 1391 static inline void 1392 efivar_unregister(struct efivar_entry *var) 1393 { 1394 kobject_put(&var->kobj); 1395 } 1396 1397 int efivars_register(struct efivars *efivars, 1398 const struct efivar_operations *ops, 1399 struct kobject *kobject); 1400 int efivars_unregister(struct efivars *efivars); 1401 struct kobject *efivars_kobject(void); 1402 1403 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *), 1404 void *data, bool duplicates, struct list_head *head); 1405 1406 int efivar_entry_add(struct efivar_entry *entry, struct list_head *head); 1407 int efivar_entry_remove(struct efivar_entry *entry); 1408 1409 int __efivar_entry_delete(struct efivar_entry *entry); 1410 int efivar_entry_delete(struct efivar_entry *entry); 1411 1412 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size); 1413 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes, 1414 unsigned long *size, void *data); 1415 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes, 1416 unsigned long *size, void *data); 1417 int efivar_entry_set(struct efivar_entry *entry, u32 attributes, 1418 unsigned long size, void *data, struct list_head *head); 1419 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes, 1420 unsigned long *size, void *data, bool *set); 1421 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes, 1422 bool block, unsigned long size, void *data); 1423 1424 int efivar_entry_iter_begin(void); 1425 void efivar_entry_iter_end(void); 1426 1427 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *), 1428 struct list_head *head, void *data, 1429 struct efivar_entry **prev); 1430 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *), 1431 struct list_head *head, void *data); 1432 1433 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid, 1434 struct list_head *head, bool remove); 1435 1436 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data, 1437 unsigned long data_size); 1438 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name, 1439 size_t len); 1440 1441 extern struct work_struct efivar_work; 1442 void efivar_run_worker(void); 1443 1444 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) 1445 int efivars_sysfs_init(void); 1446 1447 #define EFIVARS_DATA_SIZE_MAX 1024 1448 1449 #endif /* CONFIG_EFI_VARS */ 1450 extern bool efi_capsule_pending(int *reset_type); 1451 1452 extern int efi_capsule_supported(efi_guid_t guid, u32 flags, 1453 size_t size, int *reset); 1454 1455 extern int efi_capsule_update(efi_capsule_header_t *capsule, 1456 phys_addr_t *pages); 1457 1458 #ifdef CONFIG_EFI_RUNTIME_MAP 1459 int efi_runtime_map_init(struct kobject *); 1460 int efi_get_runtime_map_size(void); 1461 int efi_get_runtime_map_desc_size(void); 1462 int efi_runtime_map_copy(void *buf, size_t bufsz); 1463 #else 1464 static inline int efi_runtime_map_init(struct kobject *kobj) 1465 { 1466 return 0; 1467 } 1468 1469 static inline int efi_get_runtime_map_size(void) 1470 { 1471 return 0; 1472 } 1473 1474 static inline int efi_get_runtime_map_desc_size(void) 1475 { 1476 return 0; 1477 } 1478 1479 static inline int efi_runtime_map_copy(void *buf, size_t bufsz) 1480 { 1481 return 0; 1482 } 1483 1484 #endif 1485 1486 /* prototypes shared between arch specific and generic stub code */ 1487 1488 void efi_printk(char *str); 1489 1490 void efi_free(unsigned long size, unsigned long addr); 1491 1492 char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len); 1493 1494 efi_status_t efi_get_memory_map(struct efi_boot_memmap *map); 1495 1496 efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align, 1497 unsigned long *addr, unsigned long min); 1498 1499 static inline 1500 efi_status_t efi_low_alloc(unsigned long size, unsigned long align, 1501 unsigned long *addr) 1502 { 1503 /* 1504 * Don't allocate at 0x0. It will confuse code that 1505 * checks pointers against NULL. Skip the first 8 1506 * bytes so we start at a nice even number. 1507 */ 1508 return efi_low_alloc_above(size, align, addr, 0x8); 1509 } 1510 1511 efi_status_t efi_high_alloc(unsigned long size, unsigned long align, 1512 unsigned long *addr, unsigned long max); 1513 1514 efi_status_t efi_relocate_kernel(unsigned long *image_addr, 1515 unsigned long image_size, 1516 unsigned long alloc_size, 1517 unsigned long preferred_addr, 1518 unsigned long alignment, 1519 unsigned long min_addr); 1520 1521 efi_status_t handle_cmdline_files(efi_loaded_image_t *image, 1522 char *cmd_line, char *option_string, 1523 unsigned long max_addr, 1524 unsigned long *load_addr, 1525 unsigned long *load_size); 1526 1527 efi_status_t efi_parse_options(char const *cmdline); 1528 1529 efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto, 1530 unsigned long size); 1531 1532 #ifdef CONFIG_EFI 1533 extern bool efi_runtime_disabled(void); 1534 #else 1535 static inline bool efi_runtime_disabled(void) { return true; } 1536 #endif 1537 1538 extern void efi_call_virt_check_flags(unsigned long flags, const char *call); 1539 extern unsigned long efi_call_virt_save_flags(void); 1540 1541 enum efi_secureboot_mode { 1542 efi_secureboot_mode_unset, 1543 efi_secureboot_mode_unknown, 1544 efi_secureboot_mode_disabled, 1545 efi_secureboot_mode_enabled, 1546 }; 1547 enum efi_secureboot_mode efi_get_secureboot(void); 1548 1549 #ifdef CONFIG_RESET_ATTACK_MITIGATION 1550 void efi_enable_reset_attack_mitigation(void); 1551 #else 1552 static inline void 1553 efi_enable_reset_attack_mitigation(void) { } 1554 #endif 1555 1556 efi_status_t efi_random_get_seed(void); 1557 1558 void efi_retrieve_tpm2_eventlog(void); 1559 1560 /* 1561 * Arch code can implement the following three template macros, avoiding 1562 * reptition for the void/non-void return cases of {__,}efi_call_virt(): 1563 * 1564 * * arch_efi_call_virt_setup() 1565 * 1566 * Sets up the environment for the call (e.g. switching page tables, 1567 * allowing kernel-mode use of floating point, if required). 1568 * 1569 * * arch_efi_call_virt() 1570 * 1571 * Performs the call. The last expression in the macro must be the call 1572 * itself, allowing the logic to be shared by the void and non-void 1573 * cases. 1574 * 1575 * * arch_efi_call_virt_teardown() 1576 * 1577 * Restores the usual kernel environment once the call has returned. 1578 */ 1579 1580 #define efi_call_virt_pointer(p, f, args...) \ 1581 ({ \ 1582 efi_status_t __s; \ 1583 unsigned long __flags; \ 1584 \ 1585 arch_efi_call_virt_setup(); \ 1586 \ 1587 __flags = efi_call_virt_save_flags(); \ 1588 __s = arch_efi_call_virt(p, f, args); \ 1589 efi_call_virt_check_flags(__flags, __stringify(f)); \ 1590 \ 1591 arch_efi_call_virt_teardown(); \ 1592 \ 1593 __s; \ 1594 }) 1595 1596 #define __efi_call_virt_pointer(p, f, args...) \ 1597 ({ \ 1598 unsigned long __flags; \ 1599 \ 1600 arch_efi_call_virt_setup(); \ 1601 \ 1602 __flags = efi_call_virt_save_flags(); \ 1603 arch_efi_call_virt(p, f, args); \ 1604 efi_call_virt_check_flags(__flags, __stringify(f)); \ 1605 \ 1606 arch_efi_call_virt_teardown(); \ 1607 }) 1608 1609 typedef efi_status_t (*efi_exit_boot_map_processing)( 1610 struct efi_boot_memmap *map, 1611 void *priv); 1612 1613 efi_status_t efi_exit_boot_services(void *handle, 1614 struct efi_boot_memmap *map, 1615 void *priv, 1616 efi_exit_boot_map_processing priv_func); 1617 1618 #define EFI_RANDOM_SEED_SIZE 64U 1619 1620 struct linux_efi_random_seed { 1621 u32 size; 1622 u8 bits[]; 1623 }; 1624 1625 struct linux_efi_tpm_eventlog { 1626 u32 size; 1627 u32 final_events_preboot_size; 1628 u8 version; 1629 u8 log[]; 1630 }; 1631 1632 extern int efi_tpm_eventlog_init(void); 1633 1634 struct efi_tcg2_final_events_table { 1635 u64 version; 1636 u64 nr_events; 1637 u8 events[]; 1638 }; 1639 extern int efi_tpm_final_log_size; 1640 1641 extern unsigned long rci2_table_phys; 1642 1643 /* 1644 * efi_runtime_service() function identifiers. 1645 * "NONE" is used by efi_recover_from_page_fault() to check if the page 1646 * fault happened while executing an efi runtime service. 1647 */ 1648 enum efi_rts_ids { 1649 EFI_NONE, 1650 EFI_GET_TIME, 1651 EFI_SET_TIME, 1652 EFI_GET_WAKEUP_TIME, 1653 EFI_SET_WAKEUP_TIME, 1654 EFI_GET_VARIABLE, 1655 EFI_GET_NEXT_VARIABLE, 1656 EFI_SET_VARIABLE, 1657 EFI_QUERY_VARIABLE_INFO, 1658 EFI_GET_NEXT_HIGH_MONO_COUNT, 1659 EFI_RESET_SYSTEM, 1660 EFI_UPDATE_CAPSULE, 1661 EFI_QUERY_CAPSULE_CAPS, 1662 }; 1663 1664 /* 1665 * efi_runtime_work: Details of EFI Runtime Service work 1666 * @arg<1-5>: EFI Runtime Service function arguments 1667 * @status: Status of executing EFI Runtime Service 1668 * @efi_rts_id: EFI Runtime Service function identifier 1669 * @efi_rts_comp: Struct used for handling completions 1670 */ 1671 struct efi_runtime_work { 1672 void *arg1; 1673 void *arg2; 1674 void *arg3; 1675 void *arg4; 1676 void *arg5; 1677 efi_status_t status; 1678 struct work_struct work; 1679 enum efi_rts_ids efi_rts_id; 1680 struct completion efi_rts_comp; 1681 }; 1682 1683 extern struct efi_runtime_work efi_rts_work; 1684 1685 /* Workqueue to queue EFI Runtime Services */ 1686 extern struct workqueue_struct *efi_rts_wq; 1687 1688 struct linux_efi_memreserve { 1689 int size; // allocated size of the array 1690 atomic_t count; // number of entries used 1691 phys_addr_t next; // pa of next struct instance 1692 struct { 1693 phys_addr_t base; 1694 phys_addr_t size; 1695 } entry[0]; 1696 }; 1697 1698 #define EFI_MEMRESERVE_SIZE(count) (sizeof(struct linux_efi_memreserve) + \ 1699 (count) * sizeof(((struct linux_efi_memreserve *)0)->entry[0])) 1700 1701 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \ 1702 / sizeof(((struct linux_efi_memreserve *)0)->entry[0])) 1703 1704 void efi_pci_disable_bridge_busmaster(void); 1705 1706 #endif /* _LINUX_EFI_H */ 1707