include/linux/efi.h

   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_READY           ( 6 | (1UL << (BITS_PER_LONG-1)))
  33 #define EFI_DEVICE_ERROR        ( 7 | (1UL << (BITS_PER_LONG-1)))
  34 #define EFI_WRITE_PROTECTED     ( 8 | (1UL << (BITS_PER_LONG-1)))
  35 #define EFI_OUT_OF_RESOURCES    ( 9 | (1UL << (BITS_PER_LONG-1)))
  36 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  37 #define EFI_SECURITY_VIOLATION  (26 | (1UL << (BITS_PER_LONG-1)))
  38
  39 typedef unsigned long efi_status_t;
  40 typedef u8 efi_bool_t;
  41 typedef u16 efi_char16_t;               /* UNICODE character */
  42 typedef u64 efi_physical_addr_t;
  43 typedef void *efi_handle_t;
  44
  45
  46 typedef struct {
  47         u8 b[16];
  48 } efi_guid_t;
  49
  50 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  51 ((efi_guid_t) \
  52 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  53   (b) & 0xff, ((b) >> 8) & 0xff, \
  54   (c) & 0xff, ((c) >> 8) & 0xff, \
  55   (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  56
  57 /*
  58  * Generic EFI table header
  59  */
  60 typedef struct {
  61         u64 signature;
  62         u32 revision;
  63         u32 headersize;
  64         u32 crc32;
  65         u32 reserved;
  66 } efi_table_hdr_t;
  67
  68 /*
  69  * Memory map descriptor:
  70  */
  71
  72 /* Memory types: */
  73 #define EFI_RESERVED_TYPE                0
  74 #define EFI_LOADER_CODE                  1
  75 #define EFI_LOADER_DATA                  2
  76 #define EFI_BOOT_SERVICES_CODE           3
  77 #define EFI_BOOT_SERVICES_DATA           4
  78 #define EFI_RUNTIME_SERVICES_CODE        5
  79 #define EFI_RUNTIME_SERVICES_DATA        6
  80 #define EFI_CONVENTIONAL_MEMORY          7
  81 #define EFI_UNUSABLE_MEMORY              8
  82 #define EFI_ACPI_RECLAIM_MEMORY          9
  83 #define EFI_ACPI_MEMORY_NVS             10
  84 #define EFI_MEMORY_MAPPED_IO            11
  85 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
  86 #define EFI_PAL_CODE                    13
  87 #define EFI_MAX_MEMORY_TYPE             14
  88
  89 /* Attribute values: */
  90 #define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
  91 #define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
  92 #define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
  93 #define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
  94 #define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
  95 #define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
  96 #define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
  97 #define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
  98 #define EFI_MEMORY_DESCRIPTOR_VERSION   1
  99
 100 #define EFI_PAGE_SHIFT          12
 101 #define EFI_PAGE_SIZE           (1UL << EFI_PAGE_SHIFT)
 102
 103 typedef struct {
 104         u32 type;
 105         u32 pad;
 106         u64 phys_addr;
 107         u64 virt_addr;
 108         u64 num_pages;
 109         u64 attribute;
 110 } efi_memory_desc_t;
 111
 112 typedef struct {
 113         efi_guid_t guid;
 114         u32 headersize;
 115         u32 flags;
 116         u32 imagesize;
 117 } efi_capsule_header_t;
 118
 119 /*
 120  * Allocation types for calls to boottime->allocate_pages.
 121  */
 122 #define EFI_ALLOCATE_ANY_PAGES          0
 123 #define EFI_ALLOCATE_MAX_ADDRESS        1
 124 #define EFI_ALLOCATE_ADDRESS            2
 125 #define EFI_MAX_ALLOCATE_TYPE           3
 126
 127 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
 128
 129 /*
 130  * Types and defines for Time Services
 131  */
 132 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 133 #define EFI_TIME_IN_DAYLIGHT     0x2
 134 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 135
 136 typedef struct {
 137         u16 year;
 138         u8 month;
 139         u8 day;
 140         u8 hour;
 141         u8 minute;
 142         u8 second;
 143         u8 pad1;
 144         u32 nanosecond;
 145         s16 timezone;
 146         u8 daylight;
 147         u8 pad2;
 148 } efi_time_t;
 149
 150 typedef struct {
 151         u32 resolution;
 152         u32 accuracy;
 153         u8 sets_to_zero;
 154 } efi_time_cap_t;
 155
 156 typedef struct {
 157         efi_table_hdr_t hdr;
 158         u32 raise_tpl;
 159         u32 restore_tpl;
 160         u32 allocate_pages;
 161         u32 free_pages;
 162         u32 get_memory_map;
 163         u32 allocate_pool;
 164         u32 free_pool;
 165         u32 create_event;
 166         u32 set_timer;
 167         u32 wait_for_event;
 168         u32 signal_event;
 169         u32 close_event;
 170         u32 check_event;
 171         u32 install_protocol_interface;
 172         u32 reinstall_protocol_interface;
 173         u32 uninstall_protocol_interface;
 174         u32 handle_protocol;
 175         u32 __reserved;
 176         u32 register_protocol_notify;
 177         u32 locate_handle;
 178         u32 locate_device_path;
 179         u32 install_configuration_table;
 180         u32 load_image;
 181         u32 start_image;
 182         u32 exit;
 183         u32 unload_image;
 184         u32 exit_boot_services;
 185         u32 get_next_monotonic_count;
 186         u32 stall;
 187         u32 set_watchdog_timer;
 188         u32 connect_controller;
 189         u32 disconnect_controller;
 190         u32 open_protocol;
 191         u32 close_protocol;
 192         u32 open_protocol_information;
 193         u32 protocols_per_handle;
 194         u32 locate_handle_buffer;
 195         u32 locate_protocol;
 196         u32 install_multiple_protocol_interfaces;
 197         u32 uninstall_multiple_protocol_interfaces;
 198         u32 calculate_crc32;
 199         u32 copy_mem;
 200         u32 set_mem;
 201         u32 create_event_ex;
 202 } __packed efi_boot_services_32_t;
 203
 204 typedef struct {
 205         efi_table_hdr_t hdr;
 206         u64 raise_tpl;
 207         u64 restore_tpl;
 208         u64 allocate_pages;
 209         u64 free_pages;
 210         u64 get_memory_map;
 211         u64 allocate_pool;
 212         u64 free_pool;
 213         u64 create_event;
 214         u64 set_timer;
 215         u64 wait_for_event;
 216         u64 signal_event;
 217         u64 close_event;
 218         u64 check_event;
 219         u64 install_protocol_interface;
 220         u64 reinstall_protocol_interface;
 221         u64 uninstall_protocol_interface;
 222         u64 handle_protocol;
 223         u64 __reserved;
 224         u64 register_protocol_notify;
 225         u64 locate_handle;
 226         u64 locate_device_path;
 227         u64 install_configuration_table;
 228         u64 load_image;
 229         u64 start_image;
 230         u64 exit;
 231         u64 unload_image;
 232         u64 exit_boot_services;
 233         u64 get_next_monotonic_count;
 234         u64 stall;
 235         u64 set_watchdog_timer;
 236         u64 connect_controller;
 237         u64 disconnect_controller;
 238         u64 open_protocol;
 239         u64 close_protocol;
 240         u64 open_protocol_information;
 241         u64 protocols_per_handle;
 242         u64 locate_handle_buffer;
 243         u64 locate_protocol;
 244         u64 install_multiple_protocol_interfaces;
 245         u64 uninstall_multiple_protocol_interfaces;
 246         u64 calculate_crc32;
 247         u64 copy_mem;
 248         u64 set_mem;
 249         u64 create_event_ex;
 250 } __packed efi_boot_services_64_t;
 251
 252 /*
 253  * EFI Boot Services table
 254  */
 255 typedef struct {
 256         efi_table_hdr_t hdr;
 257         void *raise_tpl;
 258         void *restore_tpl;
 259         efi_status_t (*allocate_pages)(int, int, unsigned long,
 260                                        efi_physical_addr_t *);
 261         efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
 262         efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
 263                                        unsigned long *, u32 *);
 264         efi_status_t (*allocate_pool)(int, unsigned long, void **);
 265         efi_status_t (*free_pool)(void *);
 266         void *create_event;
 267         void *set_timer;
 268         void *wait_for_event;
 269         void *signal_event;
 270         void *close_event;
 271         void *check_event;
 272         void *install_protocol_interface;
 273         void *reinstall_protocol_interface;
 274         void *uninstall_protocol_interface;
 275         efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
 276         void *__reserved;
 277         void *register_protocol_notify;
 278         void *locate_handle;
 279         void *locate_device_path;
 280         void *install_configuration_table;
 281         void *load_image;
 282         void *start_image;
 283         void *exit;
 284         void *unload_image;
 285         efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
 286         void *get_next_monotonic_count;
 287         void *stall;
 288         void *set_watchdog_timer;
 289         void *connect_controller;
 290         void *disconnect_controller;
 291         void *open_protocol;
 292         void *close_protocol;
 293         void *open_protocol_information;
 294         void *protocols_per_handle;
 295         void *locate_handle_buffer;
 296         void *locate_protocol;
 297         void *install_multiple_protocol_interfaces;
 298         void *uninstall_multiple_protocol_interfaces;
 299         void *calculate_crc32;
 300         void *copy_mem;
 301         void *set_mem;
 302         void *create_event_ex;
 303 } efi_boot_services_t;
 304
 305 typedef enum {
 306         EfiPciIoWidthUint8,
 307         EfiPciIoWidthUint16,
 308         EfiPciIoWidthUint32,
 309         EfiPciIoWidthUint64,
 310         EfiPciIoWidthFifoUint8,
 311         EfiPciIoWidthFifoUint16,
 312         EfiPciIoWidthFifoUint32,
 313         EfiPciIoWidthFifoUint64,
 314         EfiPciIoWidthFillUint8,
 315         EfiPciIoWidthFillUint16,
 316         EfiPciIoWidthFillUint32,
 317         EfiPciIoWidthFillUint64,
 318         EfiPciIoWidthMaximum
 319 } EFI_PCI_IO_PROTOCOL_WIDTH;
 320
 321 typedef enum {
 322         EfiPciIoAttributeOperationGet,
 323         EfiPciIoAttributeOperationSet,
 324         EfiPciIoAttributeOperationEnable,
 325         EfiPciIoAttributeOperationDisable,
 326         EfiPciIoAttributeOperationSupported,
 327     EfiPciIoAttributeOperationMaximum
 328 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
 329
 330 typedef struct {
 331         u32 read;
 332         u32 write;
 333 } efi_pci_io_protocol_access_32_t;
 334
 335 typedef struct {
 336         u64 read;
 337         u64 write;
 338 } efi_pci_io_protocol_access_64_t;
 339
 340 typedef struct {
 341         void *read;
 342         void *write;
 343 } efi_pci_io_protocol_access_t;
 344
 345 typedef struct {
 346         u32 poll_mem;
 347         u32 poll_io;
 348         efi_pci_io_protocol_access_32_t mem;
 349         efi_pci_io_protocol_access_32_t io;
 350         efi_pci_io_protocol_access_32_t pci;
 351         u32 copy_mem;
 352         u32 map;
 353         u32 unmap;
 354         u32 allocate_buffer;
 355         u32 free_buffer;
 356         u32 flush;
 357         u32 get_location;
 358         u32 attributes;
 359         u32 get_bar_attributes;
 360         u32 set_bar_attributes;
 361         uint64_t romsize;
 362         void *romimage;
 363 } efi_pci_io_protocol_32;
 364
 365 typedef struct {
 366         u64 poll_mem;
 367         u64 poll_io;
 368         efi_pci_io_protocol_access_64_t mem;
 369         efi_pci_io_protocol_access_64_t io;
 370         efi_pci_io_protocol_access_64_t pci;
 371         u64 copy_mem;
 372         u64 map;
 373         u64 unmap;
 374         u64 allocate_buffer;
 375         u64 free_buffer;
 376         u64 flush;
 377         u64 get_location;
 378         u64 attributes;
 379         u64 get_bar_attributes;
 380         u64 set_bar_attributes;
 381         uint64_t romsize;
 382         void *romimage;
 383 } efi_pci_io_protocol_64;
 384
 385 typedef struct {
 386         void *poll_mem;
 387         void *poll_io;
 388         efi_pci_io_protocol_access_t mem;
 389         efi_pci_io_protocol_access_t io;
 390         efi_pci_io_protocol_access_t pci;
 391         void *copy_mem;
 392         void *map;
 393         void *unmap;
 394         void *allocate_buffer;
 395         void *free_buffer;
 396         void *flush;
 397         void *get_location;
 398         void *attributes;
 399         void *get_bar_attributes;
 400         void *set_bar_attributes;
 401         uint64_t romsize;
 402         void *romimage;
 403 } efi_pci_io_protocol;
 404
 405 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
 406 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
 407 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
 408 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
 409 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
 410 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
 411 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
 412 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
 413 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
 414 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
 415 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
 416 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
 417 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
 418 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
 419 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
 420 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
 421 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
 422 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
 423 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
 424
 425 /*
 426  * Types and defines for EFI ResetSystem
 427  */
 428 #define EFI_RESET_COLD 0
 429 #define EFI_RESET_WARM 1
 430 #define EFI_RESET_SHUTDOWN 2
 431
 432 /*
 433  * EFI Runtime Services table
 434  */
 435 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 436 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 437
 438 typedef struct {
 439         efi_table_hdr_t hdr;
 440         u32 get_time;
 441         u32 set_time;
 442         u32 get_wakeup_time;
 443         u32 set_wakeup_time;
 444         u32 set_virtual_address_map;
 445         u32 convert_pointer;
 446         u32 get_variable;
 447         u32 get_next_variable;
 448         u32 set_variable;
 449         u32 get_next_high_mono_count;
 450         u32 reset_system;
 451         u32 update_capsule;
 452         u32 query_capsule_caps;
 453         u32 query_variable_info;
 454 } efi_runtime_services_32_t;
 455
 456 typedef struct {
 457         efi_table_hdr_t hdr;
 458         u64 get_time;
 459         u64 set_time;
 460         u64 get_wakeup_time;
 461         u64 set_wakeup_time;
 462         u64 set_virtual_address_map;
 463         u64 convert_pointer;
 464         u64 get_variable;
 465         u64 get_next_variable;
 466         u64 set_variable;
 467         u64 get_next_high_mono_count;
 468         u64 reset_system;
 469         u64 update_capsule;
 470         u64 query_capsule_caps;
 471         u64 query_variable_info;
 472 } efi_runtime_services_64_t;
 473
 474 typedef struct {
 475         efi_table_hdr_t hdr;
 476         void *get_time;
 477         void *set_time;
 478         void *get_wakeup_time;
 479         void *set_wakeup_time;
 480         void *set_virtual_address_map;
 481         void *convert_pointer;
 482         void *get_variable;
 483         void *get_next_variable;
 484         void *set_variable;
 485         void *get_next_high_mono_count;
 486         void *reset_system;
 487         void *update_capsule;
 488         void *query_capsule_caps;
 489         void *query_variable_info;
 490 } efi_runtime_services_t;
 491
 492 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 493 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 494 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 495                                             efi_time_t *tm);
 496 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 497 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 498                                          unsigned long *data_size, void *data);
 499 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 500                                               efi_guid_t *vendor);
 501 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 502                                          u32 attr, unsigned long data_size,
 503                                          void *data);
 504 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 505 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 506                                  unsigned long data_size, efi_char16_t *data);
 507 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 508                                                 unsigned long descriptor_size,
 509                                                 u32 descriptor_version,
 510                                                 efi_memory_desc_t *virtual_map);
 511 typedef efi_status_t efi_query_variable_info_t(u32 attr,
 512                                                u64 *storage_space,
 513                                                u64 *remaining_space,
 514                                                u64 *max_variable_size);
 515 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 516                                           unsigned long count,
 517                                           unsigned long sg_list);
 518 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 519                                               unsigned long count,
 520                                               u64 *max_size,
 521                                               int *reset_type);
 522 typedef efi_status_t efi_query_variable_store_t(u32 attributes, unsigned long size);
 523
 524 /*
 525  *  EFI Configuration Table and GUID definitions
 526  */
 527 #define NULL_GUID \
 528     EFI_GUID(  0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
 529
 530 #define MPS_TABLE_GUID    \
 531     EFI_GUID(  0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 532
 533 #define ACPI_TABLE_GUID    \
 534     EFI_GUID(  0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 535
 536 #define ACPI_20_TABLE_GUID    \
 537     EFI_GUID(  0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
 538
 539 #define SMBIOS_TABLE_GUID    \
 540     EFI_GUID(  0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 541
 542 #define SAL_SYSTEM_TABLE_GUID    \
 543     EFI_GUID(  0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 544
 545 #define HCDP_TABLE_GUID \
 546     EFI_GUID(  0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
 547
 548 #define UGA_IO_PROTOCOL_GUID \
 549     EFI_GUID(  0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
 550
 551 #define EFI_GLOBAL_VARIABLE_GUID \
 552     EFI_GUID(  0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
 553
 554 #define UV_SYSTEM_TABLE_GUID \
 555     EFI_GUID(  0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
 556
 557 #define LINUX_EFI_CRASH_GUID \
 558     EFI_GUID(  0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
 559
 560 #define LOADED_IMAGE_PROTOCOL_GUID \
 561     EFI_GUID(  0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 562
 563 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
 564     EFI_GUID(  0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
 565
 566 #define EFI_UGA_PROTOCOL_GUID \
 567     EFI_GUID(  0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
 568
 569 #define EFI_PCI_IO_PROTOCOL_GUID \
 570     EFI_GUID(  0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
 571
 572 #define EFI_FILE_INFO_ID \
 573     EFI_GUID(  0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 574
 575 #define EFI_FILE_SYSTEM_GUID \
 576     EFI_GUID(  0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 577
 578 #define DEVICE_TREE_GUID \
 579     EFI_GUID(  0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0 )
 580
 581 typedef struct {
 582         efi_guid_t guid;
 583         u64 table;
 584 } efi_config_table_64_t;
 585
 586 typedef struct {
 587         efi_guid_t guid;
 588         u32 table;
 589 } efi_config_table_32_t;
 590
 591 typedef struct {
 592         efi_guid_t guid;
 593         unsigned long table;
 594 } efi_config_table_t;
 595
 596 typedef struct {
 597         efi_guid_t guid;
 598         const char *name;
 599         unsigned long *ptr;
 600 } efi_config_table_type_t;
 601
 602 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 603
 604 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 605 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 606 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 607 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 608 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 609 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 610
 611 typedef struct {
 612         efi_table_hdr_t hdr;
 613         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 614         u32 fw_revision;
 615         u32 __pad1;
 616         u64 con_in_handle;
 617         u64 con_in;
 618         u64 con_out_handle;
 619         u64 con_out;
 620         u64 stderr_handle;
 621         u64 stderr;
 622         u64 runtime;
 623         u64 boottime;
 624         u32 nr_tables;
 625         u32 __pad2;
 626         u64 tables;
 627 } efi_system_table_64_t;
 628
 629 typedef struct {
 630         efi_table_hdr_t hdr;
 631         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 632         u32 fw_revision;
 633         u32 con_in_handle;
 634         u32 con_in;
 635         u32 con_out_handle;
 636         u32 con_out;
 637         u32 stderr_handle;
 638         u32 stderr;
 639         u32 runtime;
 640         u32 boottime;
 641         u32 nr_tables;
 642         u32 tables;
 643 } efi_system_table_32_t;
 644
 645 typedef struct {
 646         efi_table_hdr_t hdr;
 647         unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 648         u32 fw_revision;
 649         unsigned long con_in_handle;
 650         unsigned long con_in;
 651         unsigned long con_out_handle;
 652         unsigned long con_out;
 653         unsigned long stderr_handle;
 654         unsigned long stderr;
 655         efi_runtime_services_t *runtime;
 656         efi_boot_services_t *boottime;
 657         unsigned long nr_tables;
 658         unsigned long tables;
 659 } efi_system_table_t;
 660
 661 struct efi_memory_map {
 662         void *phys_map;
 663         void *map;
 664         void *map_end;
 665         int nr_map;
 666         unsigned long desc_version;
 667         unsigned long desc_size;
 668 };
 669
 670 struct efi_fdt_params {
 671         u64 system_table;
 672         u64 mmap;
 673         u32 mmap_size;
 674         u32 desc_size;
 675         u32 desc_ver;
 676 };
 677
 678 typedef struct {
 679         u32 revision;
 680         u32 parent_handle;
 681         u32 system_table;
 682         u32 device_handle;
 683         u32 file_path;
 684         u32 reserved;
 685         u32 load_options_size;
 686         u32 load_options;
 687         u32 image_base;
 688         __aligned_u64 image_size;
 689         unsigned int image_code_type;
 690         unsigned int image_data_type;
 691         unsigned long unload;
 692 } efi_loaded_image_32_t;
 693
 694 typedef struct {
 695         u32 revision;
 696         u64 parent_handle;
 697         u64 system_table;
 698         u64 device_handle;
 699         u64 file_path;
 700         u64 reserved;
 701         u32 load_options_size;
 702         u64 load_options;
 703         u64 image_base;
 704         __aligned_u64 image_size;
 705         unsigned int image_code_type;
 706         unsigned int image_data_type;
 707         unsigned long unload;
 708 } efi_loaded_image_64_t;
 709
 710 typedef struct {
 711         u32 revision;
 712         void *parent_handle;
 713         efi_system_table_t *system_table;
 714         void *device_handle;
 715         void *file_path;
 716         void *reserved;
 717         u32 load_options_size;
 718         void *load_options;
 719         void *image_base;
 720         __aligned_u64 image_size;
 721         unsigned int image_code_type;
 722         unsigned int image_data_type;
 723         unsigned long unload;
 724 } efi_loaded_image_t;
 725
 726
 727 typedef struct {
 728         u64 size;
 729         u64 file_size;
 730         u64 phys_size;
 731         efi_time_t create_time;
 732         efi_time_t last_access_time;
 733         efi_time_t modification_time;
 734         __aligned_u64 attribute;
 735         efi_char16_t filename[1];
 736 } efi_file_info_t;
 737
 738 typedef struct {
 739         u64 revision;
 740         u32 open;
 741         u32 close;
 742         u32 delete;
 743         u32 read;
 744         u32 write;
 745         u32 get_position;
 746         u32 set_position;
 747         u32 get_info;
 748         u32 set_info;
 749         u32 flush;
 750 } efi_file_handle_32_t;
 751
 752 typedef struct {
 753         u64 revision;
 754         u64 open;
 755         u64 close;
 756         u64 delete;
 757         u64 read;
 758         u64 write;
 759         u64 get_position;
 760         u64 set_position;
 761         u64 get_info;
 762         u64 set_info;
 763         u64 flush;
 764 } efi_file_handle_64_t;
 765
 766 typedef struct _efi_file_handle {
 767         u64 revision;
 768         efi_status_t (*open)(struct _efi_file_handle *,
 769                              struct _efi_file_handle **,
 770                              efi_char16_t *, u64, u64);
 771         efi_status_t (*close)(struct _efi_file_handle *);
 772         void *delete;
 773         efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
 774                              void *);
 775         void *write;
 776         void *get_position;
 777         void *set_position;
 778         efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
 779                         unsigned long *, void *);
 780         void *set_info;
 781         void *flush;
 782 } efi_file_handle_t;
 783
 784 typedef struct _efi_file_io_interface {
 785         u64 revision;
 786         int (*open_volume)(struct _efi_file_io_interface *,
 787                            efi_file_handle_t **);
 788 } efi_file_io_interface_t;
 789
 790 #define EFI_FILE_MODE_READ      0x0000000000000001
 791 #define EFI_FILE_MODE_WRITE     0x0000000000000002
 792 #define EFI_FILE_MODE_CREATE    0x8000000000000000
 793
 794 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 795
 796 /*
 797  * All runtime access to EFI goes through this structure:
 798  */
 799 extern struct efi {
 800         efi_system_table_t *systab;     /* EFI system table */
 801         unsigned int runtime_version;   /* Runtime services version */
 802         unsigned long mps;              /* MPS table */
 803         unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
 804         unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
 805         unsigned long smbios;           /* SM BIOS table */
 806         unsigned long sal_systab;       /* SAL system table */
 807         unsigned long boot_info;        /* boot info table */
 808         unsigned long hcdp;             /* HCDP table */
 809         unsigned long uga;              /* UGA table */
 810         unsigned long uv_systab;        /* UV system table */
 811         efi_get_time_t *get_time;
 812         efi_set_time_t *set_time;
 813         efi_get_wakeup_time_t *get_wakeup_time;
 814         efi_set_wakeup_time_t *set_wakeup_time;
 815         efi_get_variable_t *get_variable;
 816         efi_get_next_variable_t *get_next_variable;
 817         efi_set_variable_t *set_variable;
 818         efi_query_variable_info_t *query_variable_info;
 819         efi_update_capsule_t *update_capsule;
 820         efi_query_capsule_caps_t *query_capsule_caps;
 821         efi_get_next_high_mono_count_t *get_next_high_mono_count;
 822         efi_reset_system_t *reset_system;
 823         efi_set_virtual_address_map_t *set_virtual_address_map;
 824         struct efi_memory_map *memmap;
 825         unsigned long flags;
 826 } efi;
 827
 828 static inline int
 829 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 830 {
 831         return memcmp(&left, &right, sizeof (efi_guid_t));
 832 }
 833
 834 static inline char *
 835 efi_guid_unparse(efi_guid_t *guid, char *out)
 836 {
 837         sprintf(out, "%pUl", guid->b);
 838         return out;
 839 }
 840
 841 extern void efi_init (void);
 842 extern void *efi_get_pal_addr (void);
 843 extern void efi_map_pal_code (void);
 844 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 845 extern void efi_gettimeofday (struct timespec *ts);
 846 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 847 #ifdef CONFIG_X86
 848 extern void efi_late_init(void);
 849 extern void efi_free_boot_services(void);
 850 extern efi_status_t efi_query_variable_store(u32 attributes, unsigned long size);
 851 #else
 852 static inline void efi_late_init(void) {}
 853 static inline void efi_free_boot_services(void) {}
 854
 855 static inline efi_status_t efi_query_variable_store(u32 attributes, unsigned long size)
 856 {
 857         return EFI_SUCCESS;
 858 }
 859 #endif
 860 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 861 extern int efi_config_init(efi_config_table_type_t *arch_tables);
 862 extern u64 efi_get_iobase (void);
 863 extern u32 efi_mem_type (unsigned long phys_addr);
 864 extern u64 efi_mem_attributes (unsigned long phys_addr);
 865 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 866 extern int __init efi_uart_console_only (void);
 867 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 868                 struct resource *data_resource, struct resource *bss_resource);
 869 extern unsigned long efi_get_time(void);
 870 extern int efi_set_rtc_mmss(unsigned long nowtime);
 871 extern void efi_reserve_boot_services(void);
 872 extern int efi_get_fdt_params(struct efi_fdt_params *params, int verbose);
 873 extern struct efi_memory_map memmap;
 874
 875 /* Iterate through an efi_memory_map */
 876 #define for_each_efi_memory_desc(m, md)                                    \
 877         for ((md) = (m)->map;                                              \
 878              (md) <= (efi_memory_desc_t *)((m)->map_end - (m)->desc_size); \
 879              (md) = (void *)(md) + (m)->desc_size)
 880
 881 /**
 882  * efi_range_is_wc - check the WC bit on an address range
 883  * @start: starting kvirt address
 884  * @len: length of range
 885  *
 886  * Consult the EFI memory map and make sure it's ok to set this range WC.
 887  * Returns true or false.
 888  */
 889 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 890 {
 891         unsigned long i;
 892
 893         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 894                 unsigned long paddr = __pa(start + i);
 895                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 896                         return 0;
 897         }
 898         /* The range checked out */
 899         return 1;
 900 }
 901
 902 #ifdef CONFIG_EFI_PCDP
 903 extern int __init efi_setup_pcdp_console(char *);
 904 #endif
 905
 906 /*
 907  * We play games with efi_enabled so that the compiler will, if
 908  * possible, remove EFI-related code altogether.
 909  */
 910 #define EFI_BOOT                0       /* Were we booted from EFI? */
 911 #define EFI_SYSTEM_TABLES       1       /* Can we use EFI system tables? */
 912 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
 913 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
 914 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
 915 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
 916
 917 #ifdef CONFIG_EFI
 918 /*
 919  * Test whether the above EFI_* bits are enabled.
 920  */
 921 static inline bool efi_enabled(int feature)
 922 {
 923         return test_bit(feature, &efi.flags) != 0;
 924 }
 925 #else
 926 static inline bool efi_enabled(int feature)
 927 {
 928         return false;
 929 }
 930 #endif
 931
 932 /*
 933  * Variable Attributes
 934  */
 935 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 936 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 937 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 938 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
 939 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
 940 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
 941 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
 942
 943 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
 944                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
 945                                 EFI_VARIABLE_RUNTIME_ACCESS | \
 946                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
 947                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
 948                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
 949                                 EFI_VARIABLE_APPEND_WRITE)
 950 /*
 951  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
 952  * not including trailing NUL
 953  */
 954 #define EFI_VARIABLE_GUID_LEN 36
 955
 956 /*
 957  * The type of search to perform when calling boottime->locate_handle
 958  */
 959 #define EFI_LOCATE_ALL_HANDLES                  0
 960 #define EFI_LOCATE_BY_REGISTER_NOTIFY           1
 961 #define EFI_LOCATE_BY_PROTOCOL                  2
 962
 963 /*
 964  * EFI Device Path information
 965  */
 966 #define EFI_DEV_HW                      0x01
 967 #define  EFI_DEV_PCI                             1
 968 #define  EFI_DEV_PCCARD                          2
 969 #define  EFI_DEV_MEM_MAPPED                      3
 970 #define  EFI_DEV_VENDOR                          4
 971 #define  EFI_DEV_CONTROLLER                      5
 972 #define EFI_DEV_ACPI                    0x02
 973 #define   EFI_DEV_BASIC_ACPI                     1
 974 #define   EFI_DEV_EXPANDED_ACPI                  2
 975 #define EFI_DEV_MSG                     0x03
 976 #define   EFI_DEV_MSG_ATAPI                      1
 977 #define   EFI_DEV_MSG_SCSI                       2
 978 #define   EFI_DEV_MSG_FC                         3
 979 #define   EFI_DEV_MSG_1394                       4
 980 #define   EFI_DEV_MSG_USB                        5
 981 #define   EFI_DEV_MSG_USB_CLASS                 15
 982 #define   EFI_DEV_MSG_I20                        6
 983 #define   EFI_DEV_MSG_MAC                       11
 984 #define   EFI_DEV_MSG_IPV4                      12
 985 #define   EFI_DEV_MSG_IPV6                      13
 986 #define   EFI_DEV_MSG_INFINIBAND                 9
 987 #define   EFI_DEV_MSG_UART                      14
 988 #define   EFI_DEV_MSG_VENDOR                    10
 989 #define EFI_DEV_MEDIA                   0x04
 990 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
 991 #define   EFI_DEV_MEDIA_CDROM                    2
 992 #define   EFI_DEV_MEDIA_VENDOR                   3
 993 #define   EFI_DEV_MEDIA_FILE                     4
 994 #define   EFI_DEV_MEDIA_PROTOCOL                 5
 995 #define EFI_DEV_BIOS_BOOT               0x05
 996 #define EFI_DEV_END_PATH                0x7F
 997 #define EFI_DEV_END_PATH2               0xFF
 998 #define   EFI_DEV_END_INSTANCE                  0x01
 999 #define   EFI_DEV_END_ENTIRE                    0xFF
1000
1001 struct efi_generic_dev_path {
1002         u8 type;
1003         u8 sub_type;
1004         u16 length;
1005 } __attribute ((packed));
1006
1007 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1008 {
1009         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1010         *addr &= PAGE_MASK;
1011 }
1012
1013 /*
1014  * EFI Variable support.
1015  *
1016  * Different firmware drivers can expose their EFI-like variables using
1017  * the following.
1018  */
1019
1020 struct efivar_operations {
1021         efi_get_variable_t *get_variable;
1022         efi_get_next_variable_t *get_next_variable;
1023         efi_set_variable_t *set_variable;
1024         efi_query_variable_store_t *query_variable_store;
1025 };
1026
1027 struct efivars {
1028         /*
1029          * ->lock protects two things:
1030          * 1) ->list - adds, removals, reads, writes
1031          * 2) ops.[gs]et_variable() calls.
1032          * It must not be held when creating sysfs entries or calling kmalloc.
1033          * ops.get_next_variable() is only called from register_efivars()
1034          * or efivar_update_sysfs_entries(),
1035          * which is protected by the BKL, so that path is safe.
1036          */
1037         spinlock_t lock;
1038         struct kset *kset;
1039         struct kobject *kobject;
1040         const struct efivar_operations *ops;
1041 };
1042
1043 /*
1044  * The maximum size of VariableName + Data = 1024
1045  * Therefore, it's reasonable to save that much
1046  * space in each part of the structure,
1047  * and we use a page for reading/writing.
1048  */
1049
1050 #define EFI_VAR_NAME_LEN        1024
1051
1052 struct efi_variable {
1053         efi_char16_t  VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1054         efi_guid_t    VendorGuid;
1055         unsigned long DataSize;
1056         __u8          Data[1024];
1057         efi_status_t  Status;
1058         __u32         Attributes;
1059 } __attribute__((packed));
1060
1061 struct efivar_entry {
1062         struct efi_variable var;
1063         struct list_head list;
1064         struct kobject kobj;
1065         bool scanning;
1066         bool deleting;
1067 };
1068
1069 struct efi_simple_text_output_protocol_32 {
1070         u32 reset;
1071         u32 output_string;
1072         u32 test_string;
1073 };
1074
1075 struct efi_simple_text_output_protocol_64 {
1076         u64 reset;
1077         u64 output_string;
1078         u64 test_string;
1079 };
1080
1081 struct efi_simple_text_output_protocol {
1082         void *reset;
1083         efi_status_t (*output_string)(void *, void *);
1084         void *test_string;
1085 };
1086
1087 extern struct list_head efivar_sysfs_list;
1088
1089 static inline void
1090 efivar_unregister(struct efivar_entry *var)
1091 {
1092         kobject_put(&var->kobj);
1093 }
1094
1095 int efivars_register(struct efivars *efivars,
1096                      const struct efivar_operations *ops,
1097                      struct kobject *kobject);
1098 int efivars_unregister(struct efivars *efivars);
1099 struct kobject *efivars_kobject(void);
1100
1101 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1102                 void *data, bool atomic, bool duplicates,
1103                 struct list_head *head);
1104
1105 void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1106 void efivar_entry_remove(struct efivar_entry *entry);
1107
1108 int __efivar_entry_delete(struct efivar_entry *entry);
1109 int efivar_entry_delete(struct efivar_entry *entry);
1110
1111 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1112 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1113                        unsigned long *size, void *data);
1114 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1115                      unsigned long *size, void *data);
1116 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1117                      unsigned long size, void *data, struct list_head *head);
1118 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1119                               unsigned long *size, void *data, bool *set);
1120 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1121                           bool block, unsigned long size, void *data);
1122
1123 void efivar_entry_iter_begin(void);
1124 void efivar_entry_iter_end(void);
1125
1126 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1127                         struct list_head *head, void *data,
1128                         struct efivar_entry **prev);
1129 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1130                       struct list_head *head, void *data);
1131
1132 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1133                                        struct list_head *head, bool remove);
1134
1135 bool efivar_validate(efi_char16_t *var_name, u8 *data, unsigned long len);
1136
1137 extern struct work_struct efivar_work;
1138 void efivar_run_worker(void);
1139
1140 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1141 int efivars_sysfs_init(void);
1142
1143 #define EFIVARS_DATA_SIZE_MAX 1024
1144
1145 #endif /* CONFIG_EFI_VARS */
1146
1147 #endif /* _LINUX_EFI_H */