1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Extensible Firmware Interface 4 * Based on 'Extensible Firmware Interface Specification' version 0.9, 5 * April 30, 1999 6 * 7 * Copyright (C) 1999 VA Linux Systems 8 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> 9 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. 10 * David Mosberger-Tang <davidm@hpl.hp.com> 11 * Stephane Eranian <eranian@hpl.hp.com> 12 * 13 * From include/linux/efi.h in kernel 4.1 with some additions/subtractions 14 */ 15 16#ifndef _EFI_H 17#define _EFI_H 18 19#include <linux/linkage.h> 20#include <linux/string.h> 21#include <linux/types.h> 22 23/* Type INTN in UEFI specification */ 24#define efi_intn_t ssize_t 25/* Type UINTN in UEFI specification*/ 26#define efi_uintn_t size_t 27 28/* 29 * EFI on x86_64 uses the Microsoft ABI which is not the default for GCC. 30 * 31 * There are two scenarios for EFI on x86_64: building a 64-bit EFI stub 32 * codes (CONFIG_EFI_STUB_64BIT) and building a 64-bit U-Boot (CONFIG_X86_64). 33 * Either needs to be properly built with the '-m64' compiler flag, and hence 34 * it is enough to only check the compiler provided define __x86_64__ here. 35 */ 36#ifdef __x86_64__ 37#define EFIAPI __attribute__((ms_abi)) 38#define efi_va_list __builtin_ms_va_list 39#define efi_va_start __builtin_ms_va_start 40#define efi_va_copy __builtin_ms_va_copy 41#define efi_va_arg __builtin_va_arg 42#define efi_va_end __builtin_ms_va_end 43#else 44#define EFIAPI asmlinkage 45#define efi_va_list va_list 46#define efi_va_start va_start 47#define efi_va_copy va_copy 48#define efi_va_arg va_arg 49#define efi_va_end va_end 50#endif /* __x86_64__ */ 51 52#define EFI32_LOADER_SIGNATURE "EL32" 53#define EFI64_LOADER_SIGNATURE "EL64" 54 55/** 56 * struct efi_device_path - device path protocol 57 * 58 * @type: device path type 59 * @sub_type: device path sub-type 60 * @length: length of the device path node including the header 61 */ 62struct efi_device_path { 63 u8 type; 64 u8 sub_type; 65 u16 length; 66} __packed; 67 68/* 69 * The EFI spec defines the EFI_GUID as 70 * "128-bit buffer containing a unique identifier value. Unless otherwise specified, 71 * aligned on a 64-bit boundary". 72 * Page 163 of the UEFI specification v2.10 and 73 * EDK2 reference implementation both define EFI_GUID as 74 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; which is 4-byte 75 * aligned. 76 */ 77typedef struct { 78 u8 b[16]; 79} efi_guid_t __attribute__((aligned(4))); 80 81#define EFI_BITS_PER_LONG (sizeof(long) * 8) 82 83/* Bit mask for EFI status code with error */ 84#define EFI_ERROR_MASK (1UL << (EFI_BITS_PER_LONG - 1)) 85/* Status codes returned by EFI protocols */ 86#define EFI_SUCCESS 0 87#define EFI_LOAD_ERROR (EFI_ERROR_MASK | 1) 88#define EFI_INVALID_PARAMETER (EFI_ERROR_MASK | 2) 89#define EFI_UNSUPPORTED (EFI_ERROR_MASK | 3) 90#define EFI_BAD_BUFFER_SIZE (EFI_ERROR_MASK | 4) 91#define EFI_BUFFER_TOO_SMALL (EFI_ERROR_MASK | 5) 92#define EFI_NOT_READY (EFI_ERROR_MASK | 6) 93#define EFI_DEVICE_ERROR (EFI_ERROR_MASK | 7) 94#define EFI_WRITE_PROTECTED (EFI_ERROR_MASK | 8) 95#define EFI_OUT_OF_RESOURCES (EFI_ERROR_MASK | 9) 96#define EFI_VOLUME_CORRUPTED (EFI_ERROR_MASK | 10) 97#define EFI_VOLUME_FULL (EFI_ERROR_MASK | 11) 98#define EFI_NO_MEDIA (EFI_ERROR_MASK | 12) 99#define EFI_MEDIA_CHANGED (EFI_ERROR_MASK | 13) 100#define EFI_NOT_FOUND (EFI_ERROR_MASK | 14) 101#define EFI_ACCESS_DENIED (EFI_ERROR_MASK | 15) 102#define EFI_NO_RESPONSE (EFI_ERROR_MASK | 16) 103#define EFI_NO_MAPPING (EFI_ERROR_MASK | 17) 104#define EFI_TIMEOUT (EFI_ERROR_MASK | 18) 105#define EFI_NOT_STARTED (EFI_ERROR_MASK | 19) 106#define EFI_ALREADY_STARTED (EFI_ERROR_MASK | 20) 107#define EFI_ABORTED (EFI_ERROR_MASK | 21) 108#define EFI_ICMP_ERROR (EFI_ERROR_MASK | 22) 109#define EFI_TFTP_ERROR (EFI_ERROR_MASK | 23) 110#define EFI_PROTOCOL_ERROR (EFI_ERROR_MASK | 24) 111#define EFI_INCOMPATIBLE_VERSION (EFI_ERROR_MASK | 25) 112#define EFI_SECURITY_VIOLATION (EFI_ERROR_MASK | 26) 113#define EFI_CRC_ERROR (EFI_ERROR_MASK | 27) 114#define EFI_END_OF_MEDIA (EFI_ERROR_MASK | 28) 115#define EFI_END_OF_FILE (EFI_ERROR_MASK | 31) 116#define EFI_INVALID_LANGUAGE (EFI_ERROR_MASK | 32) 117#define EFI_COMPROMISED_DATA (EFI_ERROR_MASK | 33) 118#define EFI_IP_ADDRESS_CONFLICT (EFI_ERROR_MASK | 34) 119#define EFI_HTTP_ERROR (EFI_ERROR_MASK | 35) 120 121#define EFI_WARN_UNKNOWN_GLYPH 1 122#define EFI_WARN_DELETE_FAILURE 2 123#define EFI_WARN_WRITE_FAILURE 3 124#define EFI_WARN_BUFFER_TOO_SMALL 4 125#define EFI_WARN_STALE_DATA 5 126#define EFI_WARN_FILE_SYSTEM 6 127#define EFI_WARN_RESET_REQUIRED 7 128 129typedef unsigned long efi_status_t; 130typedef u64 efi_physical_addr_t; 131typedef u64 efi_virtual_addr_t; 132typedef struct efi_object *efi_handle_t; 133 134#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ 135 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \ 136 ((a) >> 24) & 0xff, \ 137 (b) & 0xff, ((b) >> 8) & 0xff, \ 138 (c) & 0xff, ((c) >> 8) & 0xff, \ 139 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } } 140 141/* Generic EFI table header */ 142struct efi_table_hdr { 143 u64 signature; 144 u32 revision; 145 u32 headersize; 146 u32 crc32; 147 u32 reserved; 148}; 149 150/* Allocation types for calls to boottime->allocate_pages*/ 151/** 152 * enum efi_allocate_type - address restriction for memory allocation 153 */ 154enum efi_allocate_type { 155 /** 156 * @EFI_ALLOCATE_ANY_PAGES: 157 * Allocate any block of sufficient size. Ignore memory address. 158 */ 159 EFI_ALLOCATE_ANY_PAGES, 160 /** 161 * @EFI_ALLOCATE_MAX_ADDRESS: 162 * Allocate a memory block with an uppermost address less or equal 163 * to the indicated address. 164 */ 165 EFI_ALLOCATE_MAX_ADDRESS, 166 /** 167 * @EFI_ALLOCATE_ADDRESS: 168 * Allocate a memory block starting at the indicatged adress. 169 */ 170 EFI_ALLOCATE_ADDRESS, 171 /** 172 * @EFI_MAX_ALLOCATE_TYPE: 173 * Value use for range checking. 174 */ 175 EFI_MAX_ALLOCATE_TYPE, 176}; 177 178/* Enumeration of memory types introduced in UEFI */ 179enum efi_memory_type { 180 EFI_RESERVED_MEMORY_TYPE, 181 /* 182 * The code portions of a loaded application. 183 * (Note that UEFI OS loaders are UEFI applications.) 184 */ 185 EFI_LOADER_CODE, 186 /* 187 * The data portions of a loaded application and 188 * the default data allocation type used by an application 189 * to allocate pool memory. 190 */ 191 EFI_LOADER_DATA, 192 /* The code portions of a loaded Boot Services Driver */ 193 EFI_BOOT_SERVICES_CODE, 194 /* 195 * The data portions of a loaded Boot Services Driver and 196 * the default data allocation type used by a Boot Services 197 * Driver to allocate pool memory. 198 */ 199 EFI_BOOT_SERVICES_DATA, 200 /* The code portions of a loaded Runtime Services Driver */ 201 EFI_RUNTIME_SERVICES_CODE, 202 /* 203 * The data portions of a loaded Runtime Services Driver and 204 * the default data allocation type used by a Runtime Services 205 * Driver to allocate pool memory. 206 */ 207 EFI_RUNTIME_SERVICES_DATA, 208 /* Free (unallocated) memory */ 209 EFI_CONVENTIONAL_MEMORY, 210 /* Memory in which errors have been detected */ 211 EFI_UNUSABLE_MEMORY, 212 /* Memory that holds the ACPI tables */ 213 EFI_ACPI_RECLAIM_MEMORY, 214 /* Address space reserved for use by the firmware */ 215 EFI_ACPI_MEMORY_NVS, 216 /* 217 * Used by system firmware to request that a memory-mapped IO region 218 * be mapped by the OS to a virtual address so it can be accessed by 219 * EFI runtime services. 220 */ 221 EFI_MMAP_IO, 222 /* 223 * System memory-mapped IO region that is used to translate 224 * memory cycles to IO cycles by the processor. 225 */ 226 EFI_MMAP_IO_PORT, 227 /* 228 * Address space reserved by the firmware for code that is 229 * part of the processor. 230 */ 231 EFI_PAL_CODE, 232 /* 233 * Byte addressable non-volatile memory. 234 */ 235 EFI_PERSISTENT_MEMORY_TYPE, 236 /* 237 * Unaccepted memory must be accepted by boot target before usage. 238 */ 239 EFI_UNACCEPTED_MEMORY_TYPE, 240 241 EFI_MAX_MEMORY_TYPE, 242}; 243 244/* Attribute values */ 245#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ 246#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ 247#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ 248#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ 249#define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */ 250#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ 251#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ 252#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ 253#define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */ 254#define EFI_MEMORY_MORE_RELIABLE \ 255 ((u64)0x0000000000010000ULL) /* higher reliability */ 256#define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ 257#define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* specific-purpose memory (SPM) */ 258#define EFI_MEMORY_CPU_CRYPTO ((u64)0x0000000000080000ULL) /* cryptographically protectable */ 259#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ 260#define EFI_MEM_DESC_VERSION 1 261 262#define EFI_PAGE_SHIFT 12 263#define EFI_PAGE_SIZE (1ULL << EFI_PAGE_SHIFT) 264#define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1) 265 266struct efi_mem_desc { 267 u32 type; 268 u32 reserved; 269 efi_physical_addr_t physical_start; 270 efi_virtual_addr_t virtual_start; 271 u64 num_pages; 272 u64 attribute; 273}; 274 275#define EFI_MEMORY_DESCRIPTOR_VERSION 1 276 277/* Types and defines for Time Services */ 278#define EFI_TIME_ADJUST_DAYLIGHT 0x1 279#define EFI_TIME_IN_DAYLIGHT 0x2 280#define EFI_UNSPECIFIED_TIMEZONE 0x07ff 281 282struct efi_time { 283 u16 year; 284 u8 month; 285 u8 day; 286 u8 hour; 287 u8 minute; 288 u8 second; 289 u8 pad1; 290 u32 nanosecond; 291 s16 timezone; 292 u8 daylight; 293 u8 pad2; 294}; 295 296struct efi_time_cap { 297 u32 resolution; 298 u32 accuracy; 299 u8 sets_to_zero; 300}; 301 302enum efi_locate_search_type { 303 ALL_HANDLES, 304 BY_REGISTER_NOTIFY, 305 BY_PROTOCOL 306}; 307 308struct efi_open_protocol_info_entry { 309 efi_handle_t agent_handle; 310 efi_handle_t controller_handle; 311 u32 attributes; 312 u32 open_count; 313}; 314 315enum efi_entry_t { 316 EFIET_END, /* Signals this is the last (empty) entry */ 317 EFIET_MEMORY_MAP, 318 EFIET_GOP_MODE, 319 EFIET_SYS_TABLE, 320 321 /* Number of entries */ 322 EFIET_MEMORY_COUNT, 323}; 324 325#define EFI_TABLE_VERSION 1 326 327/** 328 * struct efi_info_hdr - Header for the EFI info table 329 * 330 * @version: EFI_TABLE_VERSION 331 * @hdr_size: Size of this struct in bytes 332 * @total_size: Total size of this header plus following data 333 * @spare: Spare space for expansion 334 */ 335struct efi_info_hdr { 336 u32 version; 337 u32 hdr_size; 338 u32 total_size; 339 u32 spare[5]; 340}; 341 342/** 343 * struct efi_entry_hdr - Header for a table entry 344 * 345 * @type: enum eft_entry_t 346 * @size: size of entry bytes excluding header and padding 347 * @addr: address of this entry (0 if it follows the header ) 348 * @link: size of entry including header and padding 349 * @spare1: Spare space for expansion 350 * @spare2: Spare space for expansion 351 */ 352struct efi_entry_hdr { 353 u32 type; 354 u32 size; 355 u64 addr; 356 u32 link; 357 u32 spare1; 358 u64 spare2; 359}; 360 361/** 362 * struct efi_entry_memmap - a memory map table passed to U-Boot 363 * 364 * @version: EFI's memory map table version 365 * @desc_size: EFI's size of each memory descriptor 366 * @spare: Spare space for expansion 367 * @desc: An array of descriptors, each @desc_size bytes apart 368 */ 369struct efi_entry_memmap { 370 u32 version; 371 u32 desc_size; 372 u64 spare; 373 struct efi_mem_desc desc[]; 374}; 375 376/** 377 * struct efi_entry_gopmode - a GOP mode table passed to U-Boot 378 * 379 * @fb_base: EFI's framebuffer base address 380 * @fb_size: EFI's framebuffer size 381 * @info_size: GOP mode info structure size 382 * @info: Start address of the GOP mode info structure 383 */ 384struct efi_entry_gopmode { 385 efi_physical_addr_t fb_base; 386 /* 387 * Not like the ones in 'struct efi_gop_mode' which are 'unsigned 388 * long', @fb_size and @info_size have to be 'u64' here. As the EFI 389 * stub codes may have different bit size from the U-Boot payload, 390 * using 'long' will cause mismatch between the producer (stub) and 391 * the consumer (payload). 392 */ 393 u64 fb_size; 394 u64 info_size; 395 /* 396 * We cannot directly use 'struct efi_gop_mode_info info[]' here as 397 * it causes compiler to complain: array type has incomplete element 398 * type 'struct efi_gop_mode_info'. 399 */ 400 struct /* efi_gop_mode_info */ { 401 u32 version; 402 u32 width; 403 u32 height; 404 u32 pixel_format; 405 u32 pixel_bitmask[4]; 406 u32 pixels_per_scanline; 407 } info[]; 408}; 409 410/** 411 * struct efi_entry_systable - system table passed to U-Boot 412 * 413 * @sys_table: EFI system table address 414 */ 415struct efi_entry_systable { 416 efi_physical_addr_t sys_table; 417}; 418 419static inline struct efi_mem_desc *efi_get_next_mem_desc( 420 struct efi_mem_desc *desc, int desc_size) 421{ 422 return (struct efi_mem_desc *)((ulong)desc + desc_size); 423} 424 425/** 426 * struct efi_priv - Information about the environment provided by EFI 427 * 428 * @parent_image: image passed into the EFI app or stub 429 * @sys_table: Pointer to system table 430 * @boot: Pointer to boot-services table 431 * @run: Pointer to runtime-services table 432 * @memmap_key: Key returned from get_memory_map() 433 * @memmap_desc: List of memory-map records 434 * @memmap_alloc: Amount of memory allocated for memory map list 435 * @memmap_size Size of memory-map list in bytes 436 * @memmap_desc_size: Size of an individual memory-map record, in bytes 437 * @memmap_version: Memory-map version 438 * 439 * @use_pool_for_malloc: true if all allocation should go through the EFI 'pool' 440 * methods allocate_pool() and free_pool(); false to use 'pages' methods 441 * allocate_pages() and free_pages() 442 * @ram_base: Base address of RAM (size CONFIG_EFI_RAM_SIZE) 443 * @image_data_type: Type of the loaded image (e.g. EFI_LOADER_CODE) 444 * 445 * @info: Header of the info list, holding info collected by the stub and passed 446 * to U-Boot 447 * @info_size: Size of the info list @info in bytes 448 * @next_hdr: Pointer to where to put the next header when adding to the list 449 */ 450struct efi_priv { 451 efi_handle_t parent_image; 452 struct efi_system_table *sys_table; 453 struct efi_boot_services *boot; 454 struct efi_runtime_services *run; 455 efi_uintn_t memmap_key; 456 struct efi_mem_desc *memmap_desc; 457 efi_uintn_t memmap_alloc; 458 efi_uintn_t memmap_size; 459 efi_uintn_t memmap_desc_size; 460 u32 memmap_version; 461 462 /* app: */ 463 bool use_pool_for_malloc; 464 unsigned long ram_base; 465 unsigned int image_data_type; 466 467 /* stub: */ 468 struct efi_info_hdr *info; 469 unsigned int info_size; 470 void *next_hdr; 471}; 472 473/* 474 * EFI attributes of the udevice handled by efi_media driver 475 * 476 * @handle: handle of the controller on which this driver is installed 477 * @blkio: block io protocol proxied by this driver 478 * @device_path: EFI path to the device 479 */ 480struct efi_media_plat { 481 efi_handle_t handle; 482 struct efi_block_io *blkio; 483 struct efi_device_path *device_path; 484}; 485 486/* Base address of the EFI image */ 487extern char image_base[]; 488 489/* Start and end of U-Boot image (for payload) */ 490extern char _binary_u_boot_bin_start[], _binary_u_boot_bin_end[]; 491 492/* 493 * Variable Attributes 494 */ 495#define EFI_VARIABLE_NON_VOLATILE 0x00000001 496#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002 497#define EFI_VARIABLE_RUNTIME_ACCESS 0x00000004 498#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x00000008 499#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x00000010 500#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x00000020 501#define EFI_VARIABLE_APPEND_WRITE 0x00000040 502#define EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS 0x00000080 503 504#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ 505 EFI_VARIABLE_BOOTSERVICE_ACCESS | \ 506 EFI_VARIABLE_RUNTIME_ACCESS | \ 507 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ 508 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ 509 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ 510 EFI_VARIABLE_APPEND_WRITE | \ 511 EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS) 512 513/** 514 * efi_get_priv() - Get access to the EFI-private information 515 * 516 * This struct it used by both the stub and the app to record things about the 517 * EFI environment. It is not available in U-Boot proper after the stub has 518 * jumped there. Use efi_info_get() to obtain info in that case. 519 * 520 * Return: pointer to private info 521 */ 522struct efi_priv *efi_get_priv(void); 523 524/** 525 * efi_set_priv() - Set up a pointer to the EFI-private information 526 * 527 * This is called in the stub and app to record the location of this 528 * information. 529 * 530 * @priv: New location of private data 531 */ 532void efi_set_priv(struct efi_priv *priv); 533 534/** 535 * efi_get_sys_table() - Get access to the main EFI system table 536 * 537 * Returns: pointer to EFI system table 538 */ 539struct efi_system_table *efi_get_sys_table(void); 540 541/** 542 * efi_get_boot() - Get access to the EFI boot services table 543 * 544 * Returns: pointer to EFI boot services table 545 */ 546struct efi_boot_services *efi_get_boot(void); 547 548/** 549 * efi_get_ram_base() - Find the base of RAM 550 * 551 * This is used when U-Boot is built as an EFI application. 552 * 553 * Returns: the base of RAM as known to U-Boot 554 */ 555unsigned long efi_get_ram_base(void); 556 557/** 558 * efi_init() - Set up ready for use of EFI boot services 559 * 560 * @priv: Pointer to our private EFI structure to fill in 561 * @banner: Banner to display when starting 562 * @image: The image handle passed to efi_main() 563 * @sys_table: The EFI system table pointer passed to efi_main() 564 * Return: 0 on succcess, EFI error code on failure 565 */ 566int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image, 567 struct efi_system_table *sys_table); 568 569/** 570 * efi_malloc() - Allocate some memory from EFI 571 * 572 * @priv: Pointer to private EFI structure 573 * @size: Number of bytes to allocate 574 * @retp: Return EFI status result 575 * Returns: pointer to memory allocated, or NULL on error 576 */ 577void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp); 578 579/** 580 * efi_free() - Free memory allocated from EFI 581 * 582 * @priv: Pointer to private EFI structure 583 * @ptr: Pointer to memory to free 584 */ 585void efi_free(struct efi_priv *priv, void *ptr); 586 587/** 588 * efi_puts() - Write out a string to the EFI console 589 * 590 * @priv: Pointer to private EFI structure 591 * @str: String to write (note this is a ASCII, not unicode) 592 */ 593void efi_puts(struct efi_priv *priv, const char *str); 594 595/** 596 * efi_putc() - Write out a character to the EFI console 597 * 598 * @priv: Pointer to private EFI structure 599 * @ch: Character to write (note this is not unicode) 600 */ 601void efi_putc(struct efi_priv *priv, const char ch); 602 603/** 604 * efi_info_get() - get an entry from an EFI table 605 * 606 * This function is called from U-Boot proper to read information set up by the 607 * EFI stub. It can only be used when running from the EFI stub, not when U-Boot 608 * is running as an app. 609 * 610 * @type: Entry type to search for 611 * @datap: Returns pointer to entry data 612 * @sizep: Returns entry size 613 * Return: 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry 614 * of the requested type, -EPROTONOSUPPORT if the table has the wrong version 615 */ 616int efi_info_get(enum efi_entry_t type, void **datap, int *sizep); 617 618/** 619 * efi_store_memory_map() - Collect the memory-map info from EFI 620 * 621 * Collect the memory info and store it for later use, e.g. in calling 622 * exit_boot_services() 623 * 624 * @priv: Pointer to private EFI structure 625 * Returns: 0 if OK, non-zero on error 626 */ 627int efi_store_memory_map(struct efi_priv *priv); 628 629/** 630 * efi_call_exit_boot_services() - Handle the exit-boot-service procedure 631 * 632 * Tell EFI we don't want their boot services anymore 633 * 634 * Return: 0 if OK, non-zero on error 635 */ 636int efi_call_exit_boot_services(void); 637 638/** 639 * efi_get_mmap() - Get the memory map from EFI 640 * 641 * This is used in the app. The caller must free *@descp when done 642 * 643 * @descp: Returns allocated pointer to EFI memory map table 644 * @sizep: Returns size of table in bytes 645 * @keyp: Returns memory-map key 646 * @desc_sizep: Returns size of each @desc_base record 647 * @versionp: Returns version number of memory map 648 * Returns: 0 on success, -ve on error 649 */ 650int efi_get_mmap(struct efi_mem_desc **descp, int *sizep, uint *keyp, 651 int *desc_sizep, uint *versionp); 652 653/** 654 * efi_show_tables() - Show a list of available tables 655 * 656 * Shows the address, GUID (and name where known) for each table 657 * 658 * @systab: System table containing the list of tables 659 */ 660void efi_show_tables(struct efi_system_table *systab); 661 662#endif /* _LINUX_EFI_H */ 663