1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H 4 #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H 5 6 #include <linux/compiler.h> 7 #include <linux/efi.h> 8 #include <linux/kernel.h> 9 #include <linux/kern_levels.h> 10 #include <linux/types.h> 11 #include <asm/efi.h> 12 13 /* 14 * __init annotations should not be used in the EFI stub, since the code is 15 * either included in the decompressor (x86, ARM) where they have no effect, 16 * or the whole stub is __init annotated at the section level (arm64), by 17 * renaming the sections, in which case the __init annotation will be 18 * redundant, and will result in section names like .init.init.text, and our 19 * linker script does not expect that. 20 */ 21 #undef __init 22 23 /* 24 * Allow the platform to override the allocation granularity: this allows 25 * systems that have the capability to run with a larger page size to deal 26 * with the allocations for initrd and fdt more efficiently. 27 */ 28 #ifndef EFI_ALLOC_ALIGN 29 #define EFI_ALLOC_ALIGN EFI_PAGE_SIZE 30 #endif 31 32 #ifndef EFI_ALLOC_LIMIT 33 #define EFI_ALLOC_LIMIT ULONG_MAX 34 #endif 35 36 extern bool efi_nochunk; 37 extern bool efi_nokaslr; 38 extern int efi_loglevel; 39 extern bool efi_novamap; 40 41 extern const efi_system_table_t *efi_system_table; 42 43 typedef union efi_dxe_services_table efi_dxe_services_table_t; 44 extern const efi_dxe_services_table_t *efi_dxe_table; 45 46 efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, 47 efi_system_table_t *sys_table_arg); 48 49 #ifndef ARCH_HAS_EFISTUB_WRAPPERS 50 51 #define efi_is_native() (true) 52 #define efi_table_attr(inst, attr) (inst)->attr 53 #define efi_fn_call(inst, func, ...) (inst)->func(__VA_ARGS__) 54 55 #endif 56 57 #define efi_call_proto(inst, func, ...) ({ \ 58 __typeof__(inst) __inst = (inst); \ 59 efi_fn_call(__inst, func, __inst, ##__VA_ARGS__); \ 60 }) 61 #define efi_bs_call(func, ...) \ 62 efi_fn_call(efi_table_attr(efi_system_table, boottime), func, ##__VA_ARGS__) 63 #define efi_rt_call(func, ...) \ 64 efi_fn_call(efi_table_attr(efi_system_table, runtime), func, ##__VA_ARGS__) 65 #define efi_dxe_call(func, ...) \ 66 efi_fn_call(efi_dxe_table, func, ##__VA_ARGS__) 67 68 #define efi_info(fmt, ...) \ 69 efi_printk(KERN_INFO fmt, ##__VA_ARGS__) 70 #define efi_warn(fmt, ...) \ 71 efi_printk(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__) 72 #define efi_err(fmt, ...) \ 73 efi_printk(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__) 74 #define efi_debug(fmt, ...) \ 75 efi_printk(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__) 76 77 #define efi_printk_once(fmt, ...) \ 78 ({ \ 79 static bool __print_once; \ 80 bool __ret_print_once = !__print_once; \ 81 \ 82 if (!__print_once) { \ 83 __print_once = true; \ 84 efi_printk(fmt, ##__VA_ARGS__); \ 85 } \ 86 __ret_print_once; \ 87 }) 88 89 #define efi_info_once(fmt, ...) \ 90 efi_printk_once(KERN_INFO fmt, ##__VA_ARGS__) 91 #define efi_warn_once(fmt, ...) \ 92 efi_printk_once(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__) 93 #define efi_err_once(fmt, ...) \ 94 efi_printk_once(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__) 95 #define efi_debug_once(fmt, ...) \ 96 efi_printk_once(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__) 97 98 /* Helper macros for the usual case of using simple C variables: */ 99 #ifndef fdt_setprop_inplace_var 100 #define fdt_setprop_inplace_var(fdt, node_offset, name, var) \ 101 fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var)) 102 #endif 103 104 #ifndef fdt_setprop_var 105 #define fdt_setprop_var(fdt, node_offset, name, var) \ 106 fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var)) 107 #endif 108 109 #define get_efi_var(name, vendor, ...) \ 110 efi_rt_call(get_variable, (efi_char16_t *)(name), \ 111 (efi_guid_t *)(vendor), __VA_ARGS__) 112 113 #define set_efi_var(name, vendor, ...) \ 114 efi_rt_call(set_variable, (efi_char16_t *)(name), \ 115 (efi_guid_t *)(vendor), __VA_ARGS__) 116 117 #define efi_get_handle_at(array, idx) \ 118 (efi_is_native() ? (array)[idx] \ 119 : (efi_handle_t)(unsigned long)((u32 *)(array))[idx]) 120 121 #define efi_get_handle_num(size) \ 122 ((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32))) 123 124 #define for_each_efi_handle(handle, array, size, i) \ 125 for (i = 0; \ 126 i < efi_get_handle_num(size) && \ 127 ((handle = efi_get_handle_at((array), i)) || true); \ 128 i++) 129 130 static inline 131 void efi_set_u64_split(u64 data, u32 *lo, u32 *hi) 132 { 133 *lo = lower_32_bits(data); 134 *hi = upper_32_bits(data); 135 } 136 137 /* 138 * Allocation types for calls to boottime->allocate_pages. 139 */ 140 #define EFI_ALLOCATE_ANY_PAGES 0 141 #define EFI_ALLOCATE_MAX_ADDRESS 1 142 #define EFI_ALLOCATE_ADDRESS 2 143 #define EFI_MAX_ALLOCATE_TYPE 3 144 145 /* 146 * The type of search to perform when calling boottime->locate_handle 147 */ 148 #define EFI_LOCATE_ALL_HANDLES 0 149 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1 150 #define EFI_LOCATE_BY_PROTOCOL 2 151 152 /* 153 * boottime->stall takes the time period in microseconds 154 */ 155 #define EFI_USEC_PER_SEC 1000000 156 157 /* 158 * boottime->set_timer takes the time in 100ns units 159 */ 160 #define EFI_100NSEC_PER_USEC ((u64)10) 161 162 /* 163 * An efi_boot_memmap is used by efi_get_memory_map() to return the 164 * EFI memory map in a dynamically allocated buffer. 165 * 166 * The buffer allocated for the EFI memory map includes extra room for 167 * a minimum of EFI_MMAP_NR_SLACK_SLOTS additional EFI memory descriptors. 168 * This facilitates the reuse of the EFI memory map buffer when a second 169 * call to ExitBootServices() is needed because of intervening changes to 170 * the EFI memory map. Other related structures, e.g. x86 e820ext, need 171 * to factor in this headroom requirement as well. 172 */ 173 #define EFI_MMAP_NR_SLACK_SLOTS 8 174 175 typedef struct efi_generic_dev_path efi_device_path_protocol_t; 176 177 union efi_device_path_to_text_protocol { 178 struct { 179 efi_char16_t *(__efiapi *convert_device_node_to_text)( 180 const efi_device_path_protocol_t *, 181 bool, bool); 182 efi_char16_t *(__efiapi *convert_device_path_to_text)( 183 const efi_device_path_protocol_t *, 184 bool, bool); 185 }; 186 struct { 187 u32 convert_device_node_to_text; 188 u32 convert_device_path_to_text; 189 } mixed_mode; 190 }; 191 192 typedef union efi_device_path_to_text_protocol efi_device_path_to_text_protocol_t; 193 194 union efi_device_path_from_text_protocol { 195 struct { 196 efi_device_path_protocol_t * 197 (__efiapi *convert_text_to_device_node)(const efi_char16_t *); 198 efi_device_path_protocol_t * 199 (__efiapi *convert_text_to_device_path)(const efi_char16_t *); 200 }; 201 struct { 202 u32 convert_text_to_device_node; 203 u32 convert_text_to_device_path; 204 } mixed_mode; 205 }; 206 207 typedef union efi_device_path_from_text_protocol efi_device_path_from_text_protocol_t; 208 209 typedef void *efi_event_t; 210 /* Note that notifications won't work in mixed mode */ 211 typedef void (__efiapi *efi_event_notify_t)(efi_event_t, void *); 212 213 #define EFI_EVT_TIMER 0x80000000U 214 #define EFI_EVT_RUNTIME 0x40000000U 215 #define EFI_EVT_NOTIFY_WAIT 0x00000100U 216 #define EFI_EVT_NOTIFY_SIGNAL 0x00000200U 217 218 /** 219 * efi_set_event_at() - add event to events array 220 * 221 * @events: array of UEFI events 222 * @ids: index where to put the event in the array 223 * @event: event to add to the aray 224 * 225 * boottime->wait_for_event() takes an array of events as input. 226 * Provide a helper to set it up correctly for mixed mode. 227 */ 228 static inline 229 void efi_set_event_at(efi_event_t *events, size_t idx, efi_event_t event) 230 { 231 if (efi_is_native()) 232 events[idx] = event; 233 else 234 ((u32 *)events)[idx] = (u32)(unsigned long)event; 235 } 236 237 #define EFI_TPL_APPLICATION 4 238 #define EFI_TPL_CALLBACK 8 239 #define EFI_TPL_NOTIFY 16 240 #define EFI_TPL_HIGH_LEVEL 31 241 242 typedef enum { 243 EfiTimerCancel, 244 EfiTimerPeriodic, 245 EfiTimerRelative 246 } EFI_TIMER_DELAY; 247 248 /* 249 * EFI Boot Services table 250 */ 251 union efi_boot_services { 252 struct { 253 efi_table_hdr_t hdr; 254 void *raise_tpl; 255 void *restore_tpl; 256 efi_status_t (__efiapi *allocate_pages)(int, int, unsigned long, 257 efi_physical_addr_t *); 258 efi_status_t (__efiapi *free_pages)(efi_physical_addr_t, 259 unsigned long); 260 efi_status_t (__efiapi *get_memory_map)(unsigned long *, void *, 261 unsigned long *, 262 unsigned long *, u32 *); 263 efi_status_t (__efiapi *allocate_pool)(int, unsigned long, 264 void **); 265 efi_status_t (__efiapi *free_pool)(void *); 266 efi_status_t (__efiapi *create_event)(u32, unsigned long, 267 efi_event_notify_t, void *, 268 efi_event_t *); 269 efi_status_t (__efiapi *set_timer)(efi_event_t, 270 EFI_TIMER_DELAY, u64); 271 efi_status_t (__efiapi *wait_for_event)(unsigned long, 272 efi_event_t *, 273 unsigned long *); 274 void *signal_event; 275 efi_status_t (__efiapi *close_event)(efi_event_t); 276 void *check_event; 277 void *install_protocol_interface; 278 void *reinstall_protocol_interface; 279 void *uninstall_protocol_interface; 280 efi_status_t (__efiapi *handle_protocol)(efi_handle_t, 281 efi_guid_t *, void **); 282 void *__reserved; 283 void *register_protocol_notify; 284 efi_status_t (__efiapi *locate_handle)(int, efi_guid_t *, 285 void *, unsigned long *, 286 efi_handle_t *); 287 efi_status_t (__efiapi *locate_device_path)(efi_guid_t *, 288 efi_device_path_protocol_t **, 289 efi_handle_t *); 290 efi_status_t (__efiapi *install_configuration_table)(efi_guid_t *, 291 void *); 292 efi_status_t (__efiapi *load_image)(bool, efi_handle_t, 293 efi_device_path_protocol_t *, 294 void *, unsigned long, 295 efi_handle_t *); 296 efi_status_t (__efiapi *start_image)(efi_handle_t, unsigned long *, 297 efi_char16_t **); 298 efi_status_t __noreturn (__efiapi *exit)(efi_handle_t, 299 efi_status_t, 300 unsigned long, 301 efi_char16_t *); 302 efi_status_t (__efiapi *unload_image)(efi_handle_t); 303 efi_status_t (__efiapi *exit_boot_services)(efi_handle_t, 304 unsigned long); 305 void *get_next_monotonic_count; 306 efi_status_t (__efiapi *stall)(unsigned long); 307 void *set_watchdog_timer; 308 void *connect_controller; 309 efi_status_t (__efiapi *disconnect_controller)(efi_handle_t, 310 efi_handle_t, 311 efi_handle_t); 312 void *open_protocol; 313 void *close_protocol; 314 void *open_protocol_information; 315 void *protocols_per_handle; 316 void *locate_handle_buffer; 317 efi_status_t (__efiapi *locate_protocol)(efi_guid_t *, void *, 318 void **); 319 efi_status_t (__efiapi *install_multiple_protocol_interfaces)(efi_handle_t *, ...); 320 efi_status_t (__efiapi *uninstall_multiple_protocol_interfaces)(efi_handle_t, ...); 321 void *calculate_crc32; 322 void (__efiapi *copy_mem)(void *, const void *, unsigned long); 323 void (__efiapi *set_mem)(void *, unsigned long, unsigned char); 324 void *create_event_ex; 325 }; 326 struct { 327 efi_table_hdr_t hdr; 328 u32 raise_tpl; 329 u32 restore_tpl; 330 u32 allocate_pages; 331 u32 free_pages; 332 u32 get_memory_map; 333 u32 allocate_pool; 334 u32 free_pool; 335 u32 create_event; 336 u32 set_timer; 337 u32 wait_for_event; 338 u32 signal_event; 339 u32 close_event; 340 u32 check_event; 341 u32 install_protocol_interface; 342 u32 reinstall_protocol_interface; 343 u32 uninstall_protocol_interface; 344 u32 handle_protocol; 345 u32 __reserved; 346 u32 register_protocol_notify; 347 u32 locate_handle; 348 u32 locate_device_path; 349 u32 install_configuration_table; 350 u32 load_image; 351 u32 start_image; 352 u32 exit; 353 u32 unload_image; 354 u32 exit_boot_services; 355 u32 get_next_monotonic_count; 356 u32 stall; 357 u32 set_watchdog_timer; 358 u32 connect_controller; 359 u32 disconnect_controller; 360 u32 open_protocol; 361 u32 close_protocol; 362 u32 open_protocol_information; 363 u32 protocols_per_handle; 364 u32 locate_handle_buffer; 365 u32 locate_protocol; 366 u32 install_multiple_protocol_interfaces; 367 u32 uninstall_multiple_protocol_interfaces; 368 u32 calculate_crc32; 369 u32 copy_mem; 370 u32 set_mem; 371 u32 create_event_ex; 372 } mixed_mode; 373 }; 374 375 typedef enum { 376 EfiGcdMemoryTypeNonExistent, 377 EfiGcdMemoryTypeReserved, 378 EfiGcdMemoryTypeSystemMemory, 379 EfiGcdMemoryTypeMemoryMappedIo, 380 EfiGcdMemoryTypePersistent, 381 EfiGcdMemoryTypeMoreReliable, 382 EfiGcdMemoryTypeMaximum 383 } efi_gcd_memory_type_t; 384 385 typedef struct { 386 efi_physical_addr_t base_address; 387 u64 length; 388 u64 capabilities; 389 u64 attributes; 390 efi_gcd_memory_type_t gcd_memory_type; 391 void *image_handle; 392 void *device_handle; 393 } efi_gcd_memory_space_desc_t; 394 395 /* 396 * EFI DXE Services table 397 */ 398 union efi_dxe_services_table { 399 struct { 400 efi_table_hdr_t hdr; 401 void *add_memory_space; 402 void *allocate_memory_space; 403 void *free_memory_space; 404 void *remove_memory_space; 405 efi_status_t (__efiapi *get_memory_space_descriptor)(efi_physical_addr_t, 406 efi_gcd_memory_space_desc_t *); 407 efi_status_t (__efiapi *set_memory_space_attributes)(efi_physical_addr_t, 408 u64, u64); 409 void *get_memory_space_map; 410 void *add_io_space; 411 void *allocate_io_space; 412 void *free_io_space; 413 void *remove_io_space; 414 void *get_io_space_descriptor; 415 void *get_io_space_map; 416 void *dispatch; 417 void *schedule; 418 void *trust; 419 void *process_firmware_volume; 420 void *set_memory_space_capabilities; 421 }; 422 struct { 423 efi_table_hdr_t hdr; 424 u32 add_memory_space; 425 u32 allocate_memory_space; 426 u32 free_memory_space; 427 u32 remove_memory_space; 428 u32 get_memory_space_descriptor; 429 u32 set_memory_space_attributes; 430 u32 get_memory_space_map; 431 u32 add_io_space; 432 u32 allocate_io_space; 433 u32 free_io_space; 434 u32 remove_io_space; 435 u32 get_io_space_descriptor; 436 u32 get_io_space_map; 437 u32 dispatch; 438 u32 schedule; 439 u32 trust; 440 u32 process_firmware_volume; 441 u32 set_memory_space_capabilities; 442 } mixed_mode; 443 }; 444 445 typedef union efi_memory_attribute_protocol efi_memory_attribute_protocol_t; 446 447 union efi_memory_attribute_protocol { 448 struct { 449 efi_status_t (__efiapi *get_memory_attributes)( 450 efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64 *); 451 452 efi_status_t (__efiapi *set_memory_attributes)( 453 efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64); 454 455 efi_status_t (__efiapi *clear_memory_attributes)( 456 efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64); 457 }; 458 struct { 459 u32 get_memory_attributes; 460 u32 set_memory_attributes; 461 u32 clear_memory_attributes; 462 } mixed_mode; 463 }; 464 465 typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t; 466 467 union efi_uga_draw_protocol { 468 struct { 469 efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *, 470 u32*, u32*, u32*, u32*); 471 void *set_mode; 472 void *blt; 473 }; 474 struct { 475 u32 get_mode; 476 u32 set_mode; 477 u32 blt; 478 } mixed_mode; 479 }; 480 481 typedef struct { 482 u16 scan_code; 483 efi_char16_t unicode_char; 484 } efi_input_key_t; 485 486 union efi_simple_text_input_protocol { 487 struct { 488 void *reset; 489 efi_status_t (__efiapi *read_keystroke)(efi_simple_text_input_protocol_t *, 490 efi_input_key_t *); 491 efi_event_t wait_for_key; 492 }; 493 struct { 494 u32 reset; 495 u32 read_keystroke; 496 u32 wait_for_key; 497 } mixed_mode; 498 }; 499 500 efi_status_t efi_wait_for_key(unsigned long usec, efi_input_key_t *key); 501 502 union efi_simple_text_output_protocol { 503 struct { 504 void *reset; 505 efi_status_t (__efiapi *output_string)(efi_simple_text_output_protocol_t *, 506 efi_char16_t *); 507 void *test_string; 508 }; 509 struct { 510 u32 reset; 511 u32 output_string; 512 u32 test_string; 513 } mixed_mode; 514 }; 515 516 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0 517 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1 518 #define PIXEL_BIT_MASK 2 519 #define PIXEL_BLT_ONLY 3 520 #define PIXEL_FORMAT_MAX 4 521 522 typedef struct { 523 u32 red_mask; 524 u32 green_mask; 525 u32 blue_mask; 526 u32 reserved_mask; 527 } efi_pixel_bitmask_t; 528 529 typedef struct { 530 u32 version; 531 u32 horizontal_resolution; 532 u32 vertical_resolution; 533 int pixel_format; 534 efi_pixel_bitmask_t pixel_information; 535 u32 pixels_per_scan_line; 536 } efi_graphics_output_mode_info_t; 537 538 typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t; 539 540 union efi_graphics_output_protocol_mode { 541 struct { 542 u32 max_mode; 543 u32 mode; 544 efi_graphics_output_mode_info_t *info; 545 unsigned long size_of_info; 546 efi_physical_addr_t frame_buffer_base; 547 unsigned long frame_buffer_size; 548 }; 549 struct { 550 u32 max_mode; 551 u32 mode; 552 u32 info; 553 u32 size_of_info; 554 u64 frame_buffer_base; 555 u32 frame_buffer_size; 556 } mixed_mode; 557 }; 558 559 typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t; 560 561 union efi_graphics_output_protocol { 562 struct { 563 efi_status_t (__efiapi *query_mode)(efi_graphics_output_protocol_t *, 564 u32, unsigned long *, 565 efi_graphics_output_mode_info_t **); 566 efi_status_t (__efiapi *set_mode) (efi_graphics_output_protocol_t *, u32); 567 void *blt; 568 efi_graphics_output_protocol_mode_t *mode; 569 }; 570 struct { 571 u32 query_mode; 572 u32 set_mode; 573 u32 blt; 574 u32 mode; 575 } mixed_mode; 576 }; 577 578 typedef union { 579 struct { 580 u32 revision; 581 efi_handle_t parent_handle; 582 efi_system_table_t *system_table; 583 efi_handle_t device_handle; 584 void *file_path; 585 void *reserved; 586 u32 load_options_size; 587 void *load_options; 588 void *image_base; 589 __aligned_u64 image_size; 590 unsigned int image_code_type; 591 unsigned int image_data_type; 592 efi_status_t (__efiapi *unload)(efi_handle_t image_handle); 593 }; 594 struct { 595 u32 revision; 596 u32 parent_handle; 597 u32 system_table; 598 u32 device_handle; 599 u32 file_path; 600 u32 reserved; 601 u32 load_options_size; 602 u32 load_options; 603 u32 image_base; 604 __aligned_u64 image_size; 605 u32 image_code_type; 606 u32 image_data_type; 607 u32 unload; 608 } mixed_mode; 609 } efi_loaded_image_t; 610 611 typedef struct { 612 u64 size; 613 u64 file_size; 614 u64 phys_size; 615 efi_time_t create_time; 616 efi_time_t last_access_time; 617 efi_time_t modification_time; 618 __aligned_u64 attribute; 619 efi_char16_t filename[]; 620 } efi_file_info_t; 621 622 typedef union efi_file_protocol efi_file_protocol_t; 623 624 union efi_file_protocol { 625 struct { 626 u64 revision; 627 efi_status_t (__efiapi *open) (efi_file_protocol_t *, 628 efi_file_protocol_t **, 629 efi_char16_t *, u64, 630 u64); 631 efi_status_t (__efiapi *close) (efi_file_protocol_t *); 632 efi_status_t (__efiapi *delete) (efi_file_protocol_t *); 633 efi_status_t (__efiapi *read) (efi_file_protocol_t *, 634 unsigned long *, 635 void *); 636 efi_status_t (__efiapi *write) (efi_file_protocol_t *, 637 unsigned long, void *); 638 efi_status_t (__efiapi *get_position)(efi_file_protocol_t *, 639 u64 *); 640 efi_status_t (__efiapi *set_position)(efi_file_protocol_t *, 641 u64); 642 efi_status_t (__efiapi *get_info) (efi_file_protocol_t *, 643 efi_guid_t *, 644 unsigned long *, 645 void *); 646 efi_status_t (__efiapi *set_info) (efi_file_protocol_t *, 647 efi_guid_t *, 648 unsigned long, 649 void *); 650 efi_status_t (__efiapi *flush) (efi_file_protocol_t *); 651 }; 652 struct { 653 u64 revision; 654 u32 open; 655 u32 close; 656 u32 delete; 657 u32 read; 658 u32 write; 659 u32 get_position; 660 u32 set_position; 661 u32 get_info; 662 u32 set_info; 663 u32 flush; 664 } mixed_mode; 665 }; 666 667 typedef union efi_simple_file_system_protocol efi_simple_file_system_protocol_t; 668 669 union efi_simple_file_system_protocol { 670 struct { 671 u64 revision; 672 efi_status_t (__efiapi *open_volume)(efi_simple_file_system_protocol_t *, 673 efi_file_protocol_t **); 674 }; 675 struct { 676 u64 revision; 677 u32 open_volume; 678 } mixed_mode; 679 }; 680 681 #define EFI_FILE_MODE_READ 0x0000000000000001 682 #define EFI_FILE_MODE_WRITE 0x0000000000000002 683 #define EFI_FILE_MODE_CREATE 0x8000000000000000 684 685 typedef enum { 686 EfiPciIoWidthUint8, 687 EfiPciIoWidthUint16, 688 EfiPciIoWidthUint32, 689 EfiPciIoWidthUint64, 690 EfiPciIoWidthFifoUint8, 691 EfiPciIoWidthFifoUint16, 692 EfiPciIoWidthFifoUint32, 693 EfiPciIoWidthFifoUint64, 694 EfiPciIoWidthFillUint8, 695 EfiPciIoWidthFillUint16, 696 EfiPciIoWidthFillUint32, 697 EfiPciIoWidthFillUint64, 698 EfiPciIoWidthMaximum 699 } EFI_PCI_IO_PROTOCOL_WIDTH; 700 701 typedef enum { 702 EfiPciIoAttributeOperationGet, 703 EfiPciIoAttributeOperationSet, 704 EfiPciIoAttributeOperationEnable, 705 EfiPciIoAttributeOperationDisable, 706 EfiPciIoAttributeOperationSupported, 707 EfiPciIoAttributeOperationMaximum 708 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION; 709 710 typedef struct { 711 u32 read; 712 u32 write; 713 } efi_pci_io_protocol_access_32_t; 714 715 typedef union efi_pci_io_protocol efi_pci_io_protocol_t; 716 717 typedef 718 efi_status_t (__efiapi *efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *, 719 EFI_PCI_IO_PROTOCOL_WIDTH, 720 u32 offset, 721 unsigned long count, 722 void *buffer); 723 724 typedef struct { 725 void *read; 726 void *write; 727 } efi_pci_io_protocol_access_t; 728 729 typedef struct { 730 efi_pci_io_protocol_cfg_t read; 731 efi_pci_io_protocol_cfg_t write; 732 } efi_pci_io_protocol_config_access_t; 733 734 union efi_pci_io_protocol { 735 struct { 736 void *poll_mem; 737 void *poll_io; 738 efi_pci_io_protocol_access_t mem; 739 efi_pci_io_protocol_access_t io; 740 efi_pci_io_protocol_config_access_t pci; 741 void *copy_mem; 742 void *map; 743 void *unmap; 744 void *allocate_buffer; 745 void *free_buffer; 746 void *flush; 747 efi_status_t (__efiapi *get_location)(efi_pci_io_protocol_t *, 748 unsigned long *segment_nr, 749 unsigned long *bus_nr, 750 unsigned long *device_nr, 751 unsigned long *func_nr); 752 void *attributes; 753 void *get_bar_attributes; 754 void *set_bar_attributes; 755 uint64_t romsize; 756 void *romimage; 757 }; 758 struct { 759 u32 poll_mem; 760 u32 poll_io; 761 efi_pci_io_protocol_access_32_t mem; 762 efi_pci_io_protocol_access_32_t io; 763 efi_pci_io_protocol_access_32_t pci; 764 u32 copy_mem; 765 u32 map; 766 u32 unmap; 767 u32 allocate_buffer; 768 u32 free_buffer; 769 u32 flush; 770 u32 get_location; 771 u32 attributes; 772 u32 get_bar_attributes; 773 u32 set_bar_attributes; 774 u64 romsize; 775 u32 romimage; 776 } mixed_mode; 777 }; 778 779 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001 780 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002 781 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004 782 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008 783 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010 784 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020 785 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040 786 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080 787 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100 788 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200 789 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400 790 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800 791 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 792 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000 793 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000 794 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000 795 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000 796 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000 797 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000 798 799 struct efi_dev_path; 800 801 typedef union apple_properties_protocol apple_properties_protocol_t; 802 803 union apple_properties_protocol { 804 struct { 805 unsigned long version; 806 efi_status_t (__efiapi *get)(apple_properties_protocol_t *, 807 struct efi_dev_path *, 808 efi_char16_t *, void *, u32 *); 809 efi_status_t (__efiapi *set)(apple_properties_protocol_t *, 810 struct efi_dev_path *, 811 efi_char16_t *, void *, u32); 812 efi_status_t (__efiapi *del)(apple_properties_protocol_t *, 813 struct efi_dev_path *, 814 efi_char16_t *); 815 efi_status_t (__efiapi *get_all)(apple_properties_protocol_t *, 816 void *buffer, u32 *); 817 }; 818 struct { 819 u32 version; 820 u32 get; 821 u32 set; 822 u32 del; 823 u32 get_all; 824 } mixed_mode; 825 }; 826 827 typedef u32 efi_tcg2_event_log_format; 828 829 #define INITRD_EVENT_TAG_ID 0x8F3B22ECU 830 #define LOAD_OPTIONS_EVENT_TAG_ID 0x8F3B22EDU 831 #define EV_EVENT_TAG 0x00000006U 832 #define EFI_TCG2_EVENT_HEADER_VERSION 0x1 833 834 struct efi_tcg2_event { 835 u32 event_size; 836 struct { 837 u32 header_size; 838 u16 header_version; 839 u32 pcr_index; 840 u32 event_type; 841 } __packed event_header; 842 /* u8[] event follows here */ 843 } __packed; 844 845 struct efi_tcg2_tagged_event { 846 u32 tagged_event_id; 847 u32 tagged_event_data_size; 848 /* u8 tagged event data follows here */ 849 } __packed; 850 851 typedef struct efi_tcg2_event efi_tcg2_event_t; 852 typedef struct efi_tcg2_tagged_event efi_tcg2_tagged_event_t; 853 typedef union efi_tcg2_protocol efi_tcg2_protocol_t; 854 855 union efi_tcg2_protocol { 856 struct { 857 void *get_capability; 858 efi_status_t (__efiapi *get_event_log)(efi_tcg2_protocol_t *, 859 efi_tcg2_event_log_format, 860 efi_physical_addr_t *, 861 efi_physical_addr_t *, 862 efi_bool_t *); 863 efi_status_t (__efiapi *hash_log_extend_event)(efi_tcg2_protocol_t *, 864 u64, 865 efi_physical_addr_t, 866 u64, 867 const efi_tcg2_event_t *); 868 void *submit_command; 869 void *get_active_pcr_banks; 870 void *set_active_pcr_banks; 871 void *get_result_of_set_active_pcr_banks; 872 }; 873 struct { 874 u32 get_capability; 875 u32 get_event_log; 876 u32 hash_log_extend_event; 877 u32 submit_command; 878 u32 get_active_pcr_banks; 879 u32 set_active_pcr_banks; 880 u32 get_result_of_set_active_pcr_banks; 881 } mixed_mode; 882 }; 883 884 struct riscv_efi_boot_protocol { 885 u64 revision; 886 887 efi_status_t (__efiapi *get_boot_hartid)(struct riscv_efi_boot_protocol *, 888 unsigned long *boot_hartid); 889 }; 890 891 typedef union efi_load_file_protocol efi_load_file_protocol_t; 892 typedef union efi_load_file_protocol efi_load_file2_protocol_t; 893 894 union efi_load_file_protocol { 895 struct { 896 efi_status_t (__efiapi *load_file)(efi_load_file_protocol_t *, 897 efi_device_path_protocol_t *, 898 bool, unsigned long *, void *); 899 }; 900 struct { 901 u32 load_file; 902 } mixed_mode; 903 }; 904 905 typedef struct { 906 u32 attributes; 907 u16 file_path_list_length; 908 u8 variable_data[]; 909 // efi_char16_t description[]; 910 // efi_device_path_protocol_t file_path_list[]; 911 // u8 optional_data[]; 912 } __packed efi_load_option_t; 913 914 #define EFI_LOAD_OPTION_ACTIVE 0x0001U 915 #define EFI_LOAD_OPTION_FORCE_RECONNECT 0x0002U 916 #define EFI_LOAD_OPTION_HIDDEN 0x0008U 917 #define EFI_LOAD_OPTION_CATEGORY 0x1f00U 918 #define EFI_LOAD_OPTION_CATEGORY_BOOT 0x0000U 919 #define EFI_LOAD_OPTION_CATEGORY_APP 0x0100U 920 921 #define EFI_LOAD_OPTION_BOOT_MASK \ 922 (EFI_LOAD_OPTION_ACTIVE|EFI_LOAD_OPTION_HIDDEN|EFI_LOAD_OPTION_CATEGORY) 923 #define EFI_LOAD_OPTION_MASK (EFI_LOAD_OPTION_FORCE_RECONNECT|EFI_LOAD_OPTION_BOOT_MASK) 924 925 typedef struct { 926 u32 attributes; 927 u16 file_path_list_length; 928 const efi_char16_t *description; 929 const efi_device_path_protocol_t *file_path_list; 930 u32 optional_data_size; 931 const void *optional_data; 932 } efi_load_option_unpacked_t; 933 934 void efi_pci_disable_bridge_busmaster(void); 935 936 typedef efi_status_t (*efi_exit_boot_map_processing)( 937 struct efi_boot_memmap *map, 938 void *priv); 939 940 efi_status_t efi_exit_boot_services(void *handle, void *priv, 941 efi_exit_boot_map_processing priv_func); 942 943 efi_status_t efi_boot_kernel(void *handle, efi_loaded_image_t *image, 944 unsigned long kernel_addr, char *cmdline_ptr); 945 946 void *get_fdt(unsigned long *fdt_size); 947 948 efi_status_t efi_alloc_virtmap(efi_memory_desc_t **virtmap, 949 unsigned long *desc_size, u32 *desc_ver); 950 void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size, 951 unsigned long desc_size, efi_memory_desc_t *runtime_map, 952 int *count); 953 954 efi_status_t efi_get_random_bytes(unsigned long size, u8 *out); 955 956 efi_status_t efi_random_alloc(unsigned long size, unsigned long align, 957 unsigned long *addr, unsigned long random_seed, 958 int memory_type); 959 960 efi_status_t efi_random_get_seed(void); 961 962 efi_status_t check_platform_features(void); 963 964 void *get_efi_config_table(efi_guid_t guid); 965 966 /* NOTE: These functions do not print a trailing newline after the string */ 967 void efi_char16_puts(efi_char16_t *); 968 void efi_puts(const char *str); 969 970 __printf(1, 2) int efi_printk(char const *fmt, ...); 971 972 void efi_free(unsigned long size, unsigned long addr); 973 974 void efi_apply_loadoptions_quirk(const void **load_options, u32 *load_options_size); 975 976 char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len); 977 978 efi_status_t efi_get_memory_map(struct efi_boot_memmap **map, 979 bool install_cfg_tbl); 980 981 efi_status_t efi_allocate_pages(unsigned long size, unsigned long *addr, 982 unsigned long max); 983 984 efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr, 985 unsigned long max, unsigned long align, 986 int memory_type); 987 988 efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align, 989 unsigned long *addr, unsigned long min); 990 991 efi_status_t efi_relocate_kernel(unsigned long *image_addr, 992 unsigned long image_size, 993 unsigned long alloc_size, 994 unsigned long preferred_addr, 995 unsigned long alignment, 996 unsigned long min_addr); 997 998 efi_status_t efi_parse_options(char const *cmdline); 999 1000 void efi_parse_option_graphics(char *option); 1001 1002 efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto, 1003 unsigned long size); 1004 1005 efi_status_t handle_cmdline_files(efi_loaded_image_t *image, 1006 const efi_char16_t *optstr, 1007 int optstr_size, 1008 unsigned long soft_limit, 1009 unsigned long hard_limit, 1010 unsigned long *load_addr, 1011 unsigned long *load_size); 1012 1013 1014 static inline efi_status_t efi_load_dtb(efi_loaded_image_t *image, 1015 unsigned long *load_addr, 1016 unsigned long *load_size) 1017 { 1018 return handle_cmdline_files(image, L"dtb=", sizeof(L"dtb=") - 2, 1019 ULONG_MAX, ULONG_MAX, load_addr, load_size); 1020 } 1021 1022 efi_status_t efi_load_initrd(efi_loaded_image_t *image, 1023 unsigned long soft_limit, 1024 unsigned long hard_limit, 1025 const struct linux_efi_initrd **out); 1026 /* 1027 * This function handles the architcture specific differences between arm and 1028 * arm64 regarding where the kernel image must be loaded and any memory that 1029 * must be reserved. On failure it is required to free all 1030 * all allocations it has made. 1031 */ 1032 efi_status_t handle_kernel_image(unsigned long *image_addr, 1033 unsigned long *image_size, 1034 unsigned long *reserve_addr, 1035 unsigned long *reserve_size, 1036 efi_loaded_image_t *image, 1037 efi_handle_t image_handle); 1038 1039 /* shared entrypoint between the normal stub and the zboot stub */ 1040 efi_status_t efi_stub_common(efi_handle_t handle, 1041 efi_loaded_image_t *image, 1042 unsigned long image_addr, 1043 char *cmdline_ptr); 1044 1045 efi_status_t efi_handle_cmdline(efi_loaded_image_t *image, char **cmdline_ptr); 1046 1047 asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint, 1048 unsigned long fdt_addr, 1049 unsigned long fdt_size); 1050 1051 void efi_handle_post_ebs_state(void); 1052 1053 enum efi_secureboot_mode efi_get_secureboot(void); 1054 1055 #ifdef CONFIG_RESET_ATTACK_MITIGATION 1056 void efi_enable_reset_attack_mitigation(void); 1057 #else 1058 static inline void 1059 efi_enable_reset_attack_mitigation(void) { } 1060 #endif 1061 1062 void efi_retrieve_tpm2_eventlog(void); 1063 1064 struct screen_info *alloc_screen_info(void); 1065 void free_screen_info(struct screen_info *si); 1066 1067 void efi_cache_sync_image(unsigned long image_base, 1068 unsigned long alloc_size, 1069 unsigned long code_size); 1070 1071 struct efi_smbios_record { 1072 u8 type; 1073 u8 length; 1074 u16 handle; 1075 }; 1076 1077 struct efi_smbios_type1_record { 1078 struct efi_smbios_record header; 1079 1080 u8 manufacturer; 1081 u8 product_name; 1082 u8 version; 1083 u8 serial_number; 1084 efi_guid_t uuid; 1085 u8 wakeup_type; 1086 u8 sku_number; 1087 u8 family; 1088 }; 1089 1090 #define efi_get_smbios_string(__type, __name) ({ \ 1091 int size = sizeof(struct efi_smbios_type ## __type ## _record); \ 1092 int off = offsetof(struct efi_smbios_type ## __type ## _record, \ 1093 __name); \ 1094 __efi_get_smbios_string(__type, off, size); \ 1095 }) 1096 1097 const u8 *__efi_get_smbios_string(u8 type, int offset, int recsize); 1098 1099 #endif 1100