linux/include/linux/efi.h
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   1#ifndef _LINUX_EFI_H
   2#define _LINUX_EFI_H
   3
   4/*
   5 * Extensible Firmware Interface
   6 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
   7 *
   8 * Copyright (C) 1999 VA Linux Systems
   9 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
  10 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
  11 *      David Mosberger-Tang <davidm@hpl.hp.com>
  12 *      Stephane Eranian <eranian@hpl.hp.com>
  13 */
  14#include <linux/init.h>
  15#include <linux/string.h>
  16#include <linux/time.h>
  17#include <linux/types.h>
  18#include <linux/proc_fs.h>
  19#include <linux/rtc.h>
  20#include <linux/ioport.h>
  21#include <linux/pfn.h>
  22#include <linux/pstore.h>
  23
  24#include <asm/page.h>
  25
  26#define EFI_SUCCESS             0
  27#define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
  28#define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
  29#define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
  30#define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
  31#define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
  32#define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  33
  34typedef unsigned long efi_status_t;
  35typedef u8 efi_bool_t;
  36typedef u16 efi_char16_t;               /* UNICODE character */
  37
  38
  39typedef struct {
  40        u8 b[16];
  41} efi_guid_t;
  42
  43#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  44((efi_guid_t) \
  45{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  46  (b) & 0xff, ((b) >> 8) & 0xff, \
  47  (c) & 0xff, ((c) >> 8) & 0xff, \
  48  (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  49
  50/*
  51 * Generic EFI table header
  52 */
  53typedef struct {
  54        u64 signature;
  55        u32 revision;
  56        u32 headersize;
  57        u32 crc32;
  58        u32 reserved;
  59} efi_table_hdr_t;
  60
  61/*
  62 * Memory map descriptor:
  63 */
  64
  65/* Memory types: */
  66#define EFI_RESERVED_TYPE                0
  67#define EFI_LOADER_CODE                  1
  68#define EFI_LOADER_DATA                  2
  69#define EFI_BOOT_SERVICES_CODE           3
  70#define EFI_BOOT_SERVICES_DATA           4
  71#define EFI_RUNTIME_SERVICES_CODE        5
  72#define EFI_RUNTIME_SERVICES_DATA        6
  73#define EFI_CONVENTIONAL_MEMORY          7
  74#define EFI_UNUSABLE_MEMORY              8
  75#define EFI_ACPI_RECLAIM_MEMORY          9
  76#define EFI_ACPI_MEMORY_NVS             10
  77#define EFI_MEMORY_MAPPED_IO            11
  78#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
  79#define EFI_PAL_CODE                    13
  80#define EFI_MAX_MEMORY_TYPE             14
  81
  82/* Attribute values: */
  83#define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
  84#define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
  85#define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
  86#define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
  87#define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
  88#define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
  89#define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
  90#define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
  91#define EFI_MEMORY_DESCRIPTOR_VERSION   1
  92
  93#define EFI_PAGE_SHIFT          12
  94
  95typedef struct {
  96        u32 type;
  97        u32 pad;
  98        u64 phys_addr;
  99        u64 virt_addr;
 100        u64 num_pages;
 101        u64 attribute;
 102} efi_memory_desc_t;
 103
 104typedef struct {
 105        efi_guid_t guid;
 106        u32 headersize;
 107        u32 flags;
 108        u32 imagesize;
 109} efi_capsule_header_t;
 110
 111/*
 112 * Allocation types for calls to boottime->allocate_pages.
 113 */
 114#define EFI_ALLOCATE_ANY_PAGES          0
 115#define EFI_ALLOCATE_MAX_ADDRESS        1
 116#define EFI_ALLOCATE_ADDRESS            2
 117#define EFI_MAX_ALLOCATE_TYPE           3
 118
 119typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
 120
 121/*
 122 * Types and defines for Time Services
 123 */
 124#define EFI_TIME_ADJUST_DAYLIGHT 0x1
 125#define EFI_TIME_IN_DAYLIGHT     0x2
 126#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 127
 128typedef struct {
 129        u16 year;
 130        u8 month;
 131        u8 day;
 132        u8 hour;
 133        u8 minute;
 134        u8 second;
 135        u8 pad1;
 136        u32 nanosecond;
 137        s16 timezone;
 138        u8 daylight;
 139        u8 pad2;
 140} efi_time_t;
 141
 142typedef struct {
 143        u32 resolution;
 144        u32 accuracy;
 145        u8 sets_to_zero;
 146} efi_time_cap_t;
 147
 148/*
 149 * EFI Boot Services table
 150 */
 151typedef struct {
 152        efi_table_hdr_t hdr;
 153        void *raise_tpl;
 154        void *restore_tpl;
 155        void *allocate_pages;
 156        void *free_pages;
 157        void *get_memory_map;
 158        void *allocate_pool;
 159        void *free_pool;
 160        void *create_event;
 161        void *set_timer;
 162        void *wait_for_event;
 163        void *signal_event;
 164        void *close_event;
 165        void *check_event;
 166        void *install_protocol_interface;
 167        void *reinstall_protocol_interface;
 168        void *uninstall_protocol_interface;
 169        void *handle_protocol;
 170        void *__reserved;
 171        void *register_protocol_notify;
 172        void *locate_handle;
 173        void *locate_device_path;
 174        void *install_configuration_table;
 175        void *load_image;
 176        void *start_image;
 177        void *exit;
 178        void *unload_image;
 179        void *exit_boot_services;
 180        void *get_next_monotonic_count;
 181        void *stall;
 182        void *set_watchdog_timer;
 183        void *connect_controller;
 184        void *disconnect_controller;
 185        void *open_protocol;
 186        void *close_protocol;
 187        void *open_protocol_information;
 188        void *protocols_per_handle;
 189        void *locate_handle_buffer;
 190        void *locate_protocol;
 191        void *install_multiple_protocol_interfaces;
 192        void *uninstall_multiple_protocol_interfaces;
 193        void *calculate_crc32;
 194        void *copy_mem;
 195        void *set_mem;
 196        void *create_event_ex;
 197} efi_boot_services_t;
 198
 199/*
 200 * Types and defines for EFI ResetSystem
 201 */
 202#define EFI_RESET_COLD 0
 203#define EFI_RESET_WARM 1
 204#define EFI_RESET_SHUTDOWN 2
 205
 206/*
 207 * EFI Runtime Services table
 208 */
 209#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 210#define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 211
 212typedef struct {
 213        efi_table_hdr_t hdr;
 214        unsigned long get_time;
 215        unsigned long set_time;
 216        unsigned long get_wakeup_time;
 217        unsigned long set_wakeup_time;
 218        unsigned long set_virtual_address_map;
 219        unsigned long convert_pointer;
 220        unsigned long get_variable;
 221        unsigned long get_next_variable;
 222        unsigned long set_variable;
 223        unsigned long get_next_high_mono_count;
 224        unsigned long reset_system;
 225        unsigned long update_capsule;
 226        unsigned long query_capsule_caps;
 227        unsigned long query_variable_info;
 228} efi_runtime_services_t;
 229
 230typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 231typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 232typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 233                                            efi_time_t *tm);
 234typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 235typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 236                                         unsigned long *data_size, void *data);
 237typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 238                                              efi_guid_t *vendor);
 239typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 
 240                                         u32 attr, unsigned long data_size,
 241                                         void *data);
 242typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 243typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 244                                 unsigned long data_size, efi_char16_t *data);
 245typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 246                                                unsigned long descriptor_size,
 247                                                u32 descriptor_version,
 248                                                efi_memory_desc_t *virtual_map);
 249typedef efi_status_t efi_query_variable_info_t(u32 attr,
 250                                               u64 *storage_space,
 251                                               u64 *remaining_space,
 252                                               u64 *max_variable_size);
 253typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 254                                          unsigned long count,
 255                                          unsigned long sg_list);
 256typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 257                                              unsigned long count,
 258                                              u64 *max_size,
 259                                              int *reset_type);
 260
 261/*
 262 *  EFI Configuration Table and GUID definitions
 263 */
 264#define NULL_GUID \
 265    EFI_GUID(  0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
 266
 267#define MPS_TABLE_GUID    \
 268    EFI_GUID(  0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 269
 270#define ACPI_TABLE_GUID    \
 271    EFI_GUID(  0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 272
 273#define ACPI_20_TABLE_GUID    \
 274    EFI_GUID(  0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
 275
 276#define SMBIOS_TABLE_GUID    \
 277    EFI_GUID(  0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 278
 279#define SAL_SYSTEM_TABLE_GUID    \
 280    EFI_GUID(  0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 281
 282#define HCDP_TABLE_GUID \
 283    EFI_GUID(  0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
 284
 285#define UGA_IO_PROTOCOL_GUID \
 286    EFI_GUID(  0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
 287
 288#define EFI_GLOBAL_VARIABLE_GUID \
 289    EFI_GUID(  0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
 290
 291#define UV_SYSTEM_TABLE_GUID \
 292    EFI_GUID(  0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
 293
 294#define LINUX_EFI_CRASH_GUID \
 295    EFI_GUID(  0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
 296
 297#define LOADED_IMAGE_PROTOCOL_GUID \
 298    EFI_GUID(  0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 299
 300#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
 301    EFI_GUID(  0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
 302
 303#define EFI_UGA_PROTOCOL_GUID \
 304    EFI_GUID(  0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
 305
 306#define EFI_PCI_IO_PROTOCOL_GUID \
 307    EFI_GUID(  0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
 308
 309#define EFI_FILE_INFO_ID \
 310    EFI_GUID(  0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 311
 312#define EFI_FILE_SYSTEM_GUID \
 313    EFI_GUID(  0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 314
 315typedef struct {
 316        efi_guid_t guid;
 317        u64 table;
 318} efi_config_table_64_t;
 319
 320typedef struct {
 321        efi_guid_t guid;
 322        u32 table;
 323} efi_config_table_32_t;
 324
 325typedef struct {
 326        efi_guid_t guid;
 327        unsigned long table;
 328} efi_config_table_t;
 329
 330#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 331
 332#define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 333#define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 334#define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 335#define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 336#define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 337#define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 338
 339typedef struct {
 340        efi_table_hdr_t hdr;
 341        u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 342        u32 fw_revision;
 343        u32 __pad1;
 344        u64 con_in_handle;
 345        u64 con_in;
 346        u64 con_out_handle;
 347        u64 con_out;
 348        u64 stderr_handle;
 349        u64 stderr;
 350        u64 runtime;
 351        u64 boottime;
 352        u32 nr_tables;
 353        u32 __pad2;
 354        u64 tables;
 355} efi_system_table_64_t;
 356
 357typedef struct {
 358        efi_table_hdr_t hdr;
 359        u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 360        u32 fw_revision;
 361        u32 con_in_handle;
 362        u32 con_in;
 363        u32 con_out_handle;
 364        u32 con_out;
 365        u32 stderr_handle;
 366        u32 stderr;
 367        u32 runtime;
 368        u32 boottime;
 369        u32 nr_tables;
 370        u32 tables;
 371} efi_system_table_32_t;
 372
 373typedef struct {
 374        efi_table_hdr_t hdr;
 375        unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 376        u32 fw_revision;
 377        unsigned long con_in_handle;
 378        unsigned long con_in;
 379        unsigned long con_out_handle;
 380        unsigned long con_out;
 381        unsigned long stderr_handle;
 382        unsigned long stderr;
 383        efi_runtime_services_t *runtime;
 384        efi_boot_services_t *boottime;
 385        unsigned long nr_tables;
 386        unsigned long tables;
 387} efi_system_table_t;
 388
 389struct efi_memory_map {
 390        void *phys_map;
 391        void *map;
 392        void *map_end;
 393        int nr_map;
 394        unsigned long desc_version;
 395        unsigned long desc_size;
 396};
 397
 398typedef struct {
 399        u32 revision;
 400        void *parent_handle;
 401        efi_system_table_t *system_table;
 402        void *device_handle;
 403        void *file_path;
 404        void *reserved;
 405        u32 load_options_size;
 406        void *load_options;
 407        void *image_base;
 408        __aligned_u64 image_size;
 409        unsigned int image_code_type;
 410        unsigned int image_data_type;
 411        unsigned long unload;
 412} efi_loaded_image_t;
 413
 414typedef struct {
 415        u64 revision;
 416        void *open_volume;
 417} efi_file_io_interface_t;
 418
 419typedef struct {
 420        u64 size;
 421        u64 file_size;
 422        u64 phys_size;
 423        efi_time_t create_time;
 424        efi_time_t last_access_time;
 425        efi_time_t modification_time;
 426        __aligned_u64 attribute;
 427        efi_char16_t filename[1];
 428} efi_file_info_t;
 429
 430typedef struct {
 431        u64 revision;
 432        void *open;
 433        void *close;
 434        void *delete;
 435        void *read;
 436        void *write;
 437        void *get_position;
 438        void *set_position;
 439        void *get_info;
 440        void *set_info;
 441        void *flush;
 442} efi_file_handle_t;
 443
 444#define EFI_FILE_MODE_READ      0x0000000000000001
 445#define EFI_FILE_MODE_WRITE     0x0000000000000002
 446#define EFI_FILE_MODE_CREATE    0x8000000000000000
 447
 448#define EFI_INVALID_TABLE_ADDR          (~0UL)
 449
 450/*
 451 * All runtime access to EFI goes through this structure:
 452 */
 453extern struct efi {
 454        efi_system_table_t *systab;     /* EFI system table */
 455        unsigned int runtime_version;   /* Runtime services version */
 456        unsigned long mps;              /* MPS table */
 457        unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
 458        unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
 459        unsigned long smbios;           /* SM BIOS table */
 460        unsigned long sal_systab;       /* SAL system table */
 461        unsigned long boot_info;        /* boot info table */
 462        unsigned long hcdp;             /* HCDP table */
 463        unsigned long uga;              /* UGA table */
 464        unsigned long uv_systab;        /* UV system table */
 465        efi_get_time_t *get_time;
 466        efi_set_time_t *set_time;
 467        efi_get_wakeup_time_t *get_wakeup_time;
 468        efi_set_wakeup_time_t *set_wakeup_time;
 469        efi_get_variable_t *get_variable;
 470        efi_get_next_variable_t *get_next_variable;
 471        efi_set_variable_t *set_variable;
 472        efi_query_variable_info_t *query_variable_info;
 473        efi_update_capsule_t *update_capsule;
 474        efi_query_capsule_caps_t *query_capsule_caps;
 475        efi_get_next_high_mono_count_t *get_next_high_mono_count;
 476        efi_reset_system_t *reset_system;
 477        efi_set_virtual_address_map_t *set_virtual_address_map;
 478} efi;
 479
 480static inline int
 481efi_guidcmp (efi_guid_t left, efi_guid_t right)
 482{
 483        return memcmp(&left, &right, sizeof (efi_guid_t));
 484}
 485
 486static inline char *
 487efi_guid_unparse(efi_guid_t *guid, char *out)
 488{
 489        sprintf(out, "%pUl", guid->b);
 490        return out;
 491}
 492
 493extern void efi_init (void);
 494extern void *efi_get_pal_addr (void);
 495extern void efi_map_pal_code (void);
 496extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 497extern void efi_gettimeofday (struct timespec *ts);
 498extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 499#ifdef CONFIG_X86
 500extern void efi_free_boot_services(void);
 501#else
 502static inline void efi_free_boot_services(void) {}
 503#endif
 504extern u64 efi_get_iobase (void);
 505extern u32 efi_mem_type (unsigned long phys_addr);
 506extern u64 efi_mem_attributes (unsigned long phys_addr);
 507extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 508extern int __init efi_uart_console_only (void);
 509extern void efi_initialize_iomem_resources(struct resource *code_resource,
 510                struct resource *data_resource, struct resource *bss_resource);
 511extern unsigned long efi_get_time(void);
 512extern int efi_set_rtc_mmss(unsigned long nowtime);
 513extern void efi_reserve_boot_services(void);
 514extern struct efi_memory_map memmap;
 515
 516/**
 517 * efi_range_is_wc - check the WC bit on an address range
 518 * @start: starting kvirt address
 519 * @len: length of range
 520 *
 521 * Consult the EFI memory map and make sure it's ok to set this range WC.
 522 * Returns true or false.
 523 */
 524static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 525{
 526        unsigned long i;
 527
 528        for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 529                unsigned long paddr = __pa(start + i);
 530                if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 531                        return 0;
 532        }
 533        /* The range checked out */
 534        return 1;
 535}
 536
 537#ifdef CONFIG_EFI_PCDP
 538extern int __init efi_setup_pcdp_console(char *);
 539#endif
 540
 541/*
 542 * We play games with efi_enabled so that the compiler will, if possible, remove
 543 * EFI-related code altogether.
 544 */
 545#ifdef CONFIG_EFI
 546# ifdef CONFIG_X86
 547   extern int efi_enabled;
 548   extern bool efi_64bit;
 549# else
 550#  define efi_enabled 1
 551# endif
 552#else
 553# define efi_enabled 0
 554#endif
 555
 556/*
 557 * Variable Attributes
 558 */
 559#define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 560#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 561#define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 562#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
 563#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
 564#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
 565#define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
 566
 567#define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
 568                                EFI_VARIABLE_BOOTSERVICE_ACCESS | \
 569                                EFI_VARIABLE_RUNTIME_ACCESS | \
 570                                EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
 571                                EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
 572                                EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
 573                                EFI_VARIABLE_APPEND_WRITE)
 574/*
 575 * The type of search to perform when calling boottime->locate_handle
 576 */
 577#define EFI_LOCATE_ALL_HANDLES                  0
 578#define EFI_LOCATE_BY_REGISTER_NOTIFY           1
 579#define EFI_LOCATE_BY_PROTOCOL                  2
 580
 581/*
 582 * EFI Device Path information
 583 */
 584#define EFI_DEV_HW                      0x01
 585#define  EFI_DEV_PCI                             1
 586#define  EFI_DEV_PCCARD                          2
 587#define  EFI_DEV_MEM_MAPPED                      3
 588#define  EFI_DEV_VENDOR                          4
 589#define  EFI_DEV_CONTROLLER                      5
 590#define EFI_DEV_ACPI                    0x02
 591#define   EFI_DEV_BASIC_ACPI                     1
 592#define   EFI_DEV_EXPANDED_ACPI                  2
 593#define EFI_DEV_MSG                     0x03
 594#define   EFI_DEV_MSG_ATAPI                      1
 595#define   EFI_DEV_MSG_SCSI                       2
 596#define   EFI_DEV_MSG_FC                         3
 597#define   EFI_DEV_MSG_1394                       4
 598#define   EFI_DEV_MSG_USB                        5
 599#define   EFI_DEV_MSG_USB_CLASS                 15
 600#define   EFI_DEV_MSG_I20                        6
 601#define   EFI_DEV_MSG_MAC                       11
 602#define   EFI_DEV_MSG_IPV4                      12
 603#define   EFI_DEV_MSG_IPV6                      13
 604#define   EFI_DEV_MSG_INFINIBAND                 9
 605#define   EFI_DEV_MSG_UART                      14
 606#define   EFI_DEV_MSG_VENDOR                    10
 607#define EFI_DEV_MEDIA                   0x04
 608#define   EFI_DEV_MEDIA_HARD_DRIVE               1
 609#define   EFI_DEV_MEDIA_CDROM                    2
 610#define   EFI_DEV_MEDIA_VENDOR                   3
 611#define   EFI_DEV_MEDIA_FILE                     4
 612#define   EFI_DEV_MEDIA_PROTOCOL                 5
 613#define EFI_DEV_BIOS_BOOT               0x05
 614#define EFI_DEV_END_PATH                0x7F
 615#define EFI_DEV_END_PATH2               0xFF
 616#define   EFI_DEV_END_INSTANCE                  0x01
 617#define   EFI_DEV_END_ENTIRE                    0xFF
 618
 619struct efi_generic_dev_path {
 620        u8 type;
 621        u8 sub_type;
 622        u16 length;
 623} __attribute ((packed));
 624
 625static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
 626{
 627        *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
 628        *addr &= PAGE_MASK;
 629}
 630
 631#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
 632/*
 633 * EFI Variable support.
 634 *
 635 * Different firmware drivers can expose their EFI-like variables using
 636 * the following.
 637 */
 638
 639struct efivar_operations {
 640        efi_get_variable_t *get_variable;
 641        efi_get_next_variable_t *get_next_variable;
 642        efi_set_variable_t *set_variable;
 643};
 644
 645struct efivars {
 646        /*
 647         * ->lock protects two things:
 648         * 1) ->list - adds, removals, reads, writes
 649         * 2) ops.[gs]et_variable() calls.
 650         * It must not be held when creating sysfs entries or calling kmalloc.
 651         * ops.get_next_variable() is only called from register_efivars(),
 652         * which is protected by the BKL, so that path is safe.
 653         */
 654        spinlock_t lock;
 655        struct list_head list;
 656        struct kset *kset;
 657        struct bin_attribute *new_var, *del_var;
 658        const struct efivar_operations *ops;
 659        struct efivar_entry *walk_entry;
 660        struct pstore_info efi_pstore_info;
 661};
 662
 663int register_efivars(struct efivars *efivars,
 664                     const struct efivar_operations *ops,
 665                     struct kobject *parent_kobj);
 666void unregister_efivars(struct efivars *efivars);
 667
 668#endif /* CONFIG_EFI_VARS */
 669
 670#endif /* _LINUX_EFI_H */
 671
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