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 #include <linux/reboot.h>
  24 #include <linux/screen_info.h>
  25
  26 #include <asm/page.h>
  27
  28 #define EFI_SUCCESS             0
  29 #define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
  30 #define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
  31 #define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
  32 #define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
  33 #define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
  34 #define EFI_NOT_READY           ( 6 | (1UL << (BITS_PER_LONG-1)))
  35 #define EFI_DEVICE_ERROR        ( 7 | (1UL << (BITS_PER_LONG-1)))
  36 #define EFI_WRITE_PROTECTED     ( 8 | (1UL << (BITS_PER_LONG-1)))
  37 #define EFI_OUT_OF_RESOURCES    ( 9 | (1UL << (BITS_PER_LONG-1)))
  38 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  39 #define EFI_SECURITY_VIOLATION  (26 | (1UL << (BITS_PER_LONG-1)))
  40
  41 typedef unsigned long efi_status_t;
  42 typedef u8 efi_bool_t;
  43 typedef u16 efi_char16_t;               /* UNICODE character */
  44 typedef u64 efi_physical_addr_t;
  45 typedef void *efi_handle_t;
  46
  47
  48 typedef struct {
  49         u8 b[16];
  50 } efi_guid_t;
  51
  52 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  53 ((efi_guid_t) \
  54 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  55   (b) & 0xff, ((b) >> 8) & 0xff, \
  56   (c) & 0xff, ((c) >> 8) & 0xff, \
  57   (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  58
  59 /*
  60  * Generic EFI table header
  61  */
  62 typedef struct {
  63         u64 signature;
  64         u32 revision;
  65         u32 headersize;
  66         u32 crc32;
  67         u32 reserved;
  68 } efi_table_hdr_t;
  69
  70 /*
  71  * Memory map descriptor:
  72  */
  73
  74 /* Memory types: */
  75 #define EFI_RESERVED_TYPE                0
  76 #define EFI_LOADER_CODE                  1
  77 #define EFI_LOADER_DATA                  2
  78 #define EFI_BOOT_SERVICES_CODE           3
  79 #define EFI_BOOT_SERVICES_DATA           4
  80 #define EFI_RUNTIME_SERVICES_CODE        5
  81 #define EFI_RUNTIME_SERVICES_DATA        6
  82 #define EFI_CONVENTIONAL_MEMORY          7
  83 #define EFI_UNUSABLE_MEMORY              8
  84 #define EFI_ACPI_RECLAIM_MEMORY          9
  85 #define EFI_ACPI_MEMORY_NVS             10
  86 #define EFI_MEMORY_MAPPED_IO            11
  87 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
  88 #define EFI_PAL_CODE                    13
  89 #define EFI_PERSISTENT_MEMORY           14
  90 #define EFI_MAX_MEMORY_TYPE             15
  91
  92 /* Attribute values: */
  93 #define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
  94 #define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
  95 #define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
  96 #define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
  97 #define EFI_MEMORY_UCE          ((u64)0x0000000000000010ULL)    /* uncached, exported */
  98 #define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
  99 #define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
 100 #define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
 101 #define EFI_MEMORY_NV           ((u64)0x0000000000008000ULL)    /* non-volatile */
 102 #define EFI_MEMORY_MORE_RELIABLE \
 103                                 ((u64)0x0000000000010000ULL)    /* higher reliability */
 104 #define EFI_MEMORY_RO           ((u64)0x0000000000020000ULL)    /* read-only */
 105 #define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
 106 #define EFI_MEMORY_DESCRIPTOR_VERSION   1
 107
 108 #define EFI_PAGE_SHIFT          12
 109 #define EFI_PAGE_SIZE           (1UL << EFI_PAGE_SHIFT)
 110
 111 typedef struct {
 112         u32 type;
 113         u32 pad;
 114         u64 phys_addr;
 115         u64 virt_addr;
 116         u64 num_pages;
 117         u64 attribute;
 118 } efi_memory_desc_t;
 119
 120 typedef struct {
 121         efi_guid_t guid;
 122         u32 headersize;
 123         u32 flags;
 124         u32 imagesize;
 125 } efi_capsule_header_t;
 126
 127 /*
 128  * EFI capsule flags
 129  */
 130 #define EFI_CAPSULE_PERSIST_ACROSS_RESET        0x00010000
 131 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE       0x00020000
 132 #define EFI_CAPSULE_INITIATE_RESET              0x00040000
 133
 134 /*
 135  * Allocation types for calls to boottime->allocate_pages.
 136  */
 137 #define EFI_ALLOCATE_ANY_PAGES          0
 138 #define EFI_ALLOCATE_MAX_ADDRESS        1
 139 #define EFI_ALLOCATE_ADDRESS            2
 140 #define EFI_MAX_ALLOCATE_TYPE           3
 141
 142 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
 143
 144 /*
 145  * Types and defines for Time Services
 146  */
 147 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 148 #define EFI_TIME_IN_DAYLIGHT     0x2
 149 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 150
 151 typedef struct {
 152         u16 year;
 153         u8 month;
 154         u8 day;
 155         u8 hour;
 156         u8 minute;
 157         u8 second;
 158         u8 pad1;
 159         u32 nanosecond;
 160         s16 timezone;
 161         u8 daylight;
 162         u8 pad2;
 163 } efi_time_t;
 164
 165 typedef struct {
 166         u32 resolution;
 167         u32 accuracy;
 168         u8 sets_to_zero;
 169 } efi_time_cap_t;
 170
 171 typedef struct {
 172         efi_table_hdr_t hdr;
 173         u32 raise_tpl;
 174         u32 restore_tpl;
 175         u32 allocate_pages;
 176         u32 free_pages;
 177         u32 get_memory_map;
 178         u32 allocate_pool;
 179         u32 free_pool;
 180         u32 create_event;
 181         u32 set_timer;
 182         u32 wait_for_event;
 183         u32 signal_event;
 184         u32 close_event;
 185         u32 check_event;
 186         u32 install_protocol_interface;
 187         u32 reinstall_protocol_interface;
 188         u32 uninstall_protocol_interface;
 189         u32 handle_protocol;
 190         u32 __reserved;
 191         u32 register_protocol_notify;
 192         u32 locate_handle;
 193         u32 locate_device_path;
 194         u32 install_configuration_table;
 195         u32 load_image;
 196         u32 start_image;
 197         u32 exit;
 198         u32 unload_image;
 199         u32 exit_boot_services;
 200         u32 get_next_monotonic_count;
 201         u32 stall;
 202         u32 set_watchdog_timer;
 203         u32 connect_controller;
 204         u32 disconnect_controller;
 205         u32 open_protocol;
 206         u32 close_protocol;
 207         u32 open_protocol_information;
 208         u32 protocols_per_handle;
 209         u32 locate_handle_buffer;
 210         u32 locate_protocol;
 211         u32 install_multiple_protocol_interfaces;
 212         u32 uninstall_multiple_protocol_interfaces;
 213         u32 calculate_crc32;
 214         u32 copy_mem;
 215         u32 set_mem;
 216         u32 create_event_ex;
 217 } __packed efi_boot_services_32_t;
 218
 219 typedef struct {
 220         efi_table_hdr_t hdr;
 221         u64 raise_tpl;
 222         u64 restore_tpl;
 223         u64 allocate_pages;
 224         u64 free_pages;
 225         u64 get_memory_map;
 226         u64 allocate_pool;
 227         u64 free_pool;
 228         u64 create_event;
 229         u64 set_timer;
 230         u64 wait_for_event;
 231         u64 signal_event;
 232         u64 close_event;
 233         u64 check_event;
 234         u64 install_protocol_interface;
 235         u64 reinstall_protocol_interface;
 236         u64 uninstall_protocol_interface;
 237         u64 handle_protocol;
 238         u64 __reserved;
 239         u64 register_protocol_notify;
 240         u64 locate_handle;
 241         u64 locate_device_path;
 242         u64 install_configuration_table;
 243         u64 load_image;
 244         u64 start_image;
 245         u64 exit;
 246         u64 unload_image;
 247         u64 exit_boot_services;
 248         u64 get_next_monotonic_count;
 249         u64 stall;
 250         u64 set_watchdog_timer;
 251         u64 connect_controller;
 252         u64 disconnect_controller;
 253         u64 open_protocol;
 254         u64 close_protocol;
 255         u64 open_protocol_information;
 256         u64 protocols_per_handle;
 257         u64 locate_handle_buffer;
 258         u64 locate_protocol;
 259         u64 install_multiple_protocol_interfaces;
 260         u64 uninstall_multiple_protocol_interfaces;
 261         u64 calculate_crc32;
 262         u64 copy_mem;
 263         u64 set_mem;
 264         u64 create_event_ex;
 265 } __packed efi_boot_services_64_t;
 266
 267 /*
 268  * EFI Boot Services table
 269  */
 270 typedef struct {
 271         efi_table_hdr_t hdr;
 272         void *raise_tpl;
 273         void *restore_tpl;
 274         efi_status_t (*allocate_pages)(int, int, unsigned long,
 275                                        efi_physical_addr_t *);
 276         efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
 277         efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
 278                                        unsigned long *, u32 *);
 279         efi_status_t (*allocate_pool)(int, unsigned long, void **);
 280         efi_status_t (*free_pool)(void *);
 281         void *create_event;
 282         void *set_timer;
 283         void *wait_for_event;
 284         void *signal_event;
 285         void *close_event;
 286         void *check_event;
 287         void *install_protocol_interface;
 288         void *reinstall_protocol_interface;
 289         void *uninstall_protocol_interface;
 290         efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
 291         void *__reserved;
 292         void *register_protocol_notify;
 293         efi_status_t (*locate_handle)(int, efi_guid_t *, void *,
 294                                       unsigned long *, efi_handle_t *);
 295         void *locate_device_path;
 296         efi_status_t (*install_configuration_table)(efi_guid_t *, void *);
 297         void *load_image;
 298         void *start_image;
 299         void *exit;
 300         void *unload_image;
 301         efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
 302         void *get_next_monotonic_count;
 303         void *stall;
 304         void *set_watchdog_timer;
 305         void *connect_controller;
 306         void *disconnect_controller;
 307         void *open_protocol;
 308         void *close_protocol;
 309         void *open_protocol_information;
 310         void *protocols_per_handle;
 311         void *locate_handle_buffer;
 312         efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
 313         void *install_multiple_protocol_interfaces;
 314         void *uninstall_multiple_protocol_interfaces;
 315         void *calculate_crc32;
 316         void *copy_mem;
 317         void *set_mem;
 318         void *create_event_ex;
 319 } efi_boot_services_t;
 320
 321 typedef enum {
 322         EfiPciIoWidthUint8,
 323         EfiPciIoWidthUint16,
 324         EfiPciIoWidthUint32,
 325         EfiPciIoWidthUint64,
 326         EfiPciIoWidthFifoUint8,
 327         EfiPciIoWidthFifoUint16,
 328         EfiPciIoWidthFifoUint32,
 329         EfiPciIoWidthFifoUint64,
 330         EfiPciIoWidthFillUint8,
 331         EfiPciIoWidthFillUint16,
 332         EfiPciIoWidthFillUint32,
 333         EfiPciIoWidthFillUint64,
 334         EfiPciIoWidthMaximum
 335 } EFI_PCI_IO_PROTOCOL_WIDTH;
 336
 337 typedef enum {
 338         EfiPciIoAttributeOperationGet,
 339         EfiPciIoAttributeOperationSet,
 340         EfiPciIoAttributeOperationEnable,
 341         EfiPciIoAttributeOperationDisable,
 342         EfiPciIoAttributeOperationSupported,
 343     EfiPciIoAttributeOperationMaximum
 344 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
 345
 346 typedef struct {
 347         u32 read;
 348         u32 write;
 349 } efi_pci_io_protocol_access_32_t;
 350
 351 typedef struct {
 352         u64 read;
 353         u64 write;
 354 } efi_pci_io_protocol_access_64_t;
 355
 356 typedef struct {
 357         void *read;
 358         void *write;
 359 } efi_pci_io_protocol_access_t;
 360
 361 typedef struct {
 362         u32 poll_mem;
 363         u32 poll_io;
 364         efi_pci_io_protocol_access_32_t mem;
 365         efi_pci_io_protocol_access_32_t io;
 366         efi_pci_io_protocol_access_32_t pci;
 367         u32 copy_mem;
 368         u32 map;
 369         u32 unmap;
 370         u32 allocate_buffer;
 371         u32 free_buffer;
 372         u32 flush;
 373         u32 get_location;
 374         u32 attributes;
 375         u32 get_bar_attributes;
 376         u32 set_bar_attributes;
 377         uint64_t romsize;
 378         void *romimage;
 379 } efi_pci_io_protocol_32;
 380
 381 typedef struct {
 382         u64 poll_mem;
 383         u64 poll_io;
 384         efi_pci_io_protocol_access_64_t mem;
 385         efi_pci_io_protocol_access_64_t io;
 386         efi_pci_io_protocol_access_64_t pci;
 387         u64 copy_mem;
 388         u64 map;
 389         u64 unmap;
 390         u64 allocate_buffer;
 391         u64 free_buffer;
 392         u64 flush;
 393         u64 get_location;
 394         u64 attributes;
 395         u64 get_bar_attributes;
 396         u64 set_bar_attributes;
 397         uint64_t romsize;
 398         void *romimage;
 399 } efi_pci_io_protocol_64;
 400
 401 typedef struct {
 402         void *poll_mem;
 403         void *poll_io;
 404         efi_pci_io_protocol_access_t mem;
 405         efi_pci_io_protocol_access_t io;
 406         efi_pci_io_protocol_access_t pci;
 407         void *copy_mem;
 408         void *map;
 409         void *unmap;
 410         void *allocate_buffer;
 411         void *free_buffer;
 412         void *flush;
 413         void *get_location;
 414         void *attributes;
 415         void *get_bar_attributes;
 416         void *set_bar_attributes;
 417         uint64_t romsize;
 418         void *romimage;
 419 } efi_pci_io_protocol;
 420
 421 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
 422 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
 423 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
 424 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
 425 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
 426 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
 427 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
 428 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
 429 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
 430 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
 431 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
 432 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
 433 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
 434 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
 435 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
 436 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
 437 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
 438 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
 439 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
 440
 441 /*
 442  * Types and defines for EFI ResetSystem
 443  */
 444 #define EFI_RESET_COLD 0
 445 #define EFI_RESET_WARM 1
 446 #define EFI_RESET_SHUTDOWN 2
 447
 448 /*
 449  * EFI Runtime Services table
 450  */
 451 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 452 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 453
 454 typedef struct {
 455         efi_table_hdr_t hdr;
 456         u32 get_time;
 457         u32 set_time;
 458         u32 get_wakeup_time;
 459         u32 set_wakeup_time;
 460         u32 set_virtual_address_map;
 461         u32 convert_pointer;
 462         u32 get_variable;
 463         u32 get_next_variable;
 464         u32 set_variable;
 465         u32 get_next_high_mono_count;
 466         u32 reset_system;
 467         u32 update_capsule;
 468         u32 query_capsule_caps;
 469         u32 query_variable_info;
 470 } efi_runtime_services_32_t;
 471
 472 typedef struct {
 473         efi_table_hdr_t hdr;
 474         u64 get_time;
 475         u64 set_time;
 476         u64 get_wakeup_time;
 477         u64 set_wakeup_time;
 478         u64 set_virtual_address_map;
 479         u64 convert_pointer;
 480         u64 get_variable;
 481         u64 get_next_variable;
 482         u64 set_variable;
 483         u64 get_next_high_mono_count;
 484         u64 reset_system;
 485         u64 update_capsule;
 486         u64 query_capsule_caps;
 487         u64 query_variable_info;
 488 } efi_runtime_services_64_t;
 489
 490 typedef struct {
 491         efi_table_hdr_t hdr;
 492         void *get_time;
 493         void *set_time;
 494         void *get_wakeup_time;
 495         void *set_wakeup_time;
 496         void *set_virtual_address_map;
 497         void *convert_pointer;
 498         void *get_variable;
 499         void *get_next_variable;
 500         void *set_variable;
 501         void *get_next_high_mono_count;
 502         void *reset_system;
 503         void *update_capsule;
 504         void *query_capsule_caps;
 505         void *query_variable_info;
 506 } efi_runtime_services_t;
 507
 508 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 509 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 510 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 511                                             efi_time_t *tm);
 512 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 513 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 514                                          unsigned long *data_size, void *data);
 515 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 516                                               efi_guid_t *vendor);
 517 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 518                                          u32 attr, unsigned long data_size,
 519                                          void *data);
 520 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 521 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 522                                  unsigned long data_size, efi_char16_t *data);
 523 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 524                                                 unsigned long descriptor_size,
 525                                                 u32 descriptor_version,
 526                                                 efi_memory_desc_t *virtual_map);
 527 typedef efi_status_t efi_query_variable_info_t(u32 attr,
 528                                                u64 *storage_space,
 529                                                u64 *remaining_space,
 530                                                u64 *max_variable_size);
 531 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 532                                           unsigned long count,
 533                                           unsigned long sg_list);
 534 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 535                                               unsigned long count,
 536                                               u64 *max_size,
 537                                               int *reset_type);
 538 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
 539                                                 unsigned long size,
 540                                                 bool nonblocking);
 541
 542 void efi_native_runtime_setup(void);
 543
 544 /*
 545  *  EFI Configuration Table and GUID definitions
 546  */
 547 #define NULL_GUID \
 548         EFI_GUID(0x00000000, 0x0000, 0x0000, \
 549                  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
 550
 551 #define MPS_TABLE_GUID    \
 552         EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, \
 553                  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 554
 555 #define ACPI_TABLE_GUID    \
 556         EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, \
 557                  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 558
 559 #define ACPI_20_TABLE_GUID    \
 560         EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, \
 561                  0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
 562
 563 #define SMBIOS_TABLE_GUID    \
 564         EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, \
 565                  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 566
 567 #define SMBIOS3_TABLE_GUID    \
 568         EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, \
 569                  0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
 570
 571 #define SAL_SYSTEM_TABLE_GUID    \
 572         EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, \
 573                  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 574
 575 #define HCDP_TABLE_GUID \
 576         EFI_GUID(0xf951938d, 0x620b, 0x42ef, \
 577                  0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
 578
 579 #define UGA_IO_PROTOCOL_GUID \
 580         EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, \
 581                  0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
 582
 583 #define EFI_GLOBAL_VARIABLE_GUID \
 584         EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, \
 585                  0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
 586
 587 #define UV_SYSTEM_TABLE_GUID \
 588         EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, \
 589                  0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
 590
 591 #define LINUX_EFI_CRASH_GUID \
 592         EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, \
 593                  0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
 594
 595 #define LOADED_IMAGE_PROTOCOL_GUID \
 596         EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, \
 597                  0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 598
 599 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
 600         EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, \
 601                  0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
 602
 603 #define EFI_UGA_PROTOCOL_GUID \
 604         EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, \
 605                  0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
 606
 607 #define EFI_PCI_IO_PROTOCOL_GUID \
 608         EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, \
 609                  0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
 610
 611 #define EFI_FILE_INFO_ID \
 612         EFI_GUID(0x9576e92, 0x6d3f, 0x11d2, \
 613                  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 614
 615 #define EFI_SYSTEM_RESOURCE_TABLE_GUID \
 616         EFI_GUID(0xb122a263, 0x3661, 0x4f68, \
 617                  0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
 618
 619 #define EFI_FILE_SYSTEM_GUID \
 620         EFI_GUID(0x964e5b22, 0x6459, 0x11d2, \
 621                  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 622
 623 #define DEVICE_TREE_GUID \
 624         EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, \
 625                  0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
 626
 627 #define EFI_PROPERTIES_TABLE_GUID \
 628         EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, \
 629                  0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
 630
 631 #define EFI_RNG_PROTOCOL_GUID \
 632         EFI_GUID(0x3152bca5, 0xeade, 0x433d, \
 633                  0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
 634
 635 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID \
 636         EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, \
 637                  0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
 638
 639 #define EFI_CONSOLE_OUT_DEVICE_GUID \
 640         EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, \
 641                  0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 642
 643 /*
 644  * This GUID is used to pass to the kernel proper the struct screen_info
 645  * structure that was populated by the stub based on the GOP protocol instance
 646  * associated with ConOut
 647  */
 648 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID \
 649         EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, \
 650                  0xb9, 0xe, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
 651
 652 #define LINUX_EFI_LOADER_ENTRY_GUID \
 653         EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, \
 654                  0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
 655
 656 typedef struct {
 657         efi_guid_t guid;
 658         u64 table;
 659 } efi_config_table_64_t;
 660
 661 typedef struct {
 662         efi_guid_t guid;
 663         u32 table;
 664 } efi_config_table_32_t;
 665
 666 typedef struct {
 667         efi_guid_t guid;
 668         unsigned long table;
 669 } efi_config_table_t;
 670
 671 typedef struct {
 672         efi_guid_t guid;
 673         const char *name;
 674         unsigned long *ptr;
 675 } efi_config_table_type_t;
 676
 677 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 678
 679 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 680 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 681 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 682 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 683 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 684 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 685
 686 typedef struct {
 687         efi_table_hdr_t hdr;
 688         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 689         u32 fw_revision;
 690         u32 __pad1;
 691         u64 con_in_handle;
 692         u64 con_in;
 693         u64 con_out_handle;
 694         u64 con_out;
 695         u64 stderr_handle;
 696         u64 stderr;
 697         u64 runtime;
 698         u64 boottime;
 699         u32 nr_tables;
 700         u32 __pad2;
 701         u64 tables;
 702 } efi_system_table_64_t;
 703
 704 typedef struct {
 705         efi_table_hdr_t hdr;
 706         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 707         u32 fw_revision;
 708         u32 con_in_handle;
 709         u32 con_in;
 710         u32 con_out_handle;
 711         u32 con_out;
 712         u32 stderr_handle;
 713         u32 stderr;
 714         u32 runtime;
 715         u32 boottime;
 716         u32 nr_tables;
 717         u32 tables;
 718 } efi_system_table_32_t;
 719
 720 typedef struct {
 721         efi_table_hdr_t hdr;
 722         unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 723         u32 fw_revision;
 724         unsigned long con_in_handle;
 725         unsigned long con_in;
 726         unsigned long con_out_handle;
 727         unsigned long con_out;
 728         unsigned long stderr_handle;
 729         unsigned long stderr;
 730         efi_runtime_services_t *runtime;
 731         efi_boot_services_t *boottime;
 732         unsigned long nr_tables;
 733         unsigned long tables;
 734 } efi_system_table_t;
 735
 736 struct efi_memory_map {
 737         phys_addr_t phys_map;
 738         void *map;
 739         void *map_end;
 740         int nr_map;
 741         unsigned long desc_version;
 742         unsigned long desc_size;
 743 };
 744
 745 struct efi_fdt_params {
 746         u64 system_table;
 747         u64 mmap;
 748         u32 mmap_size;
 749         u32 desc_size;
 750         u32 desc_ver;
 751 };
 752
 753 typedef struct {
 754         u32 revision;
 755         u32 parent_handle;
 756         u32 system_table;
 757         u32 device_handle;
 758         u32 file_path;
 759         u32 reserved;
 760         u32 load_options_size;
 761         u32 load_options;
 762         u32 image_base;
 763         __aligned_u64 image_size;
 764         unsigned int image_code_type;
 765         unsigned int image_data_type;
 766         unsigned long unload;
 767 } efi_loaded_image_32_t;
 768
 769 typedef struct {
 770         u32 revision;
 771         u64 parent_handle;
 772         u64 system_table;
 773         u64 device_handle;
 774         u64 file_path;
 775         u64 reserved;
 776         u32 load_options_size;
 777         u64 load_options;
 778         u64 image_base;
 779         __aligned_u64 image_size;
 780         unsigned int image_code_type;
 781         unsigned int image_data_type;
 782         unsigned long unload;
 783 } efi_loaded_image_64_t;
 784
 785 typedef struct {
 786         u32 revision;
 787         void *parent_handle;
 788         efi_system_table_t *system_table;
 789         void *device_handle;
 790         void *file_path;
 791         void *reserved;
 792         u32 load_options_size;
 793         void *load_options;
 794         void *image_base;
 795         __aligned_u64 image_size;
 796         unsigned int image_code_type;
 797         unsigned int image_data_type;
 798         unsigned long unload;
 799 } efi_loaded_image_t;
 800
 801
 802 typedef struct {
 803         u64 size;
 804         u64 file_size;
 805         u64 phys_size;
 806         efi_time_t create_time;
 807         efi_time_t last_access_time;
 808         efi_time_t modification_time;
 809         __aligned_u64 attribute;
 810         efi_char16_t filename[1];
 811 } efi_file_info_t;
 812
 813 typedef struct {
 814         u64 revision;
 815         u32 open;
 816         u32 close;
 817         u32 delete;
 818         u32 read;
 819         u32 write;
 820         u32 get_position;
 821         u32 set_position;
 822         u32 get_info;
 823         u32 set_info;
 824         u32 flush;
 825 } efi_file_handle_32_t;
 826
 827 typedef struct {
 828         u64 revision;
 829         u64 open;
 830         u64 close;
 831         u64 delete;
 832         u64 read;
 833         u64 write;
 834         u64 get_position;
 835         u64 set_position;
 836         u64 get_info;
 837         u64 set_info;
 838         u64 flush;
 839 } efi_file_handle_64_t;
 840
 841 typedef struct _efi_file_handle {
 842         u64 revision;
 843         efi_status_t (*open)(struct _efi_file_handle *,
 844                              struct _efi_file_handle **,
 845                              efi_char16_t *, u64, u64);
 846         efi_status_t (*close)(struct _efi_file_handle *);
 847         void *delete;
 848         efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
 849                              void *);
 850         void *write;
 851         void *get_position;
 852         void *set_position;
 853         efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
 854                         unsigned long *, void *);
 855         void *set_info;
 856         void *flush;
 857 } efi_file_handle_t;
 858
 859 typedef struct _efi_file_io_interface {
 860         u64 revision;
 861         int (*open_volume)(struct _efi_file_io_interface *,
 862                            efi_file_handle_t **);
 863 } efi_file_io_interface_t;
 864
 865 #define EFI_FILE_MODE_READ      0x0000000000000001
 866 #define EFI_FILE_MODE_WRITE     0x0000000000000002
 867 #define EFI_FILE_MODE_CREATE    0x8000000000000000
 868
 869 typedef struct {
 870         u32 version;
 871         u32 length;
 872         u64 memory_protection_attribute;
 873 } efi_properties_table_t;
 874
 875 #define EFI_PROPERTIES_TABLE_VERSION    0x00010000
 876 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
 877
 878 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 879
 880 typedef struct {
 881         u32 version;
 882         u32 num_entries;
 883         u32 desc_size;
 884         u32 reserved;
 885         efi_memory_desc_t entry[0];
 886 } efi_memory_attributes_table_t;
 887
 888 /*
 889  * All runtime access to EFI goes through this structure:
 890  */
 891 extern struct efi {
 892         efi_system_table_t *systab;     /* EFI system table */
 893         unsigned int runtime_version;   /* Runtime services version */
 894         unsigned long mps;              /* MPS table */
 895         unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
 896         unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
 897         unsigned long smbios;           /* SMBIOS table (32 bit entry point) */
 898         unsigned long smbios3;          /* SMBIOS table (64 bit entry point) */
 899         unsigned long sal_systab;       /* SAL system table */
 900         unsigned long boot_info;        /* boot info table */
 901         unsigned long hcdp;             /* HCDP table */
 902         unsigned long uga;              /* UGA table */
 903         unsigned long uv_systab;        /* UV system table */
 904         unsigned long fw_vendor;        /* fw_vendor */
 905         unsigned long runtime;          /* runtime table */
 906         unsigned long config_table;     /* config tables */
 907         unsigned long esrt;             /* ESRT table */
 908         unsigned long properties_table; /* properties table */
 909         unsigned long mem_attr_table;   /* memory attributes table */
 910         efi_get_time_t *get_time;
 911         efi_set_time_t *set_time;
 912         efi_get_wakeup_time_t *get_wakeup_time;
 913         efi_set_wakeup_time_t *set_wakeup_time;
 914         efi_get_variable_t *get_variable;
 915         efi_get_next_variable_t *get_next_variable;
 916         efi_set_variable_t *set_variable;
 917         efi_set_variable_t *set_variable_nonblocking;
 918         efi_query_variable_info_t *query_variable_info;
 919         efi_query_variable_info_t *query_variable_info_nonblocking;
 920         efi_update_capsule_t *update_capsule;
 921         efi_query_capsule_caps_t *query_capsule_caps;
 922         efi_get_next_high_mono_count_t *get_next_high_mono_count;
 923         efi_reset_system_t *reset_system;
 924         efi_set_virtual_address_map_t *set_virtual_address_map;
 925         struct efi_memory_map memmap;
 926         unsigned long flags;
 927 } efi;
 928
 929 static inline int
 930 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 931 {
 932         return memcmp(&left, &right, sizeof (efi_guid_t));
 933 }
 934
 935 static inline char *
 936 efi_guid_to_str(efi_guid_t *guid, char *out)
 937 {
 938         sprintf(out, "%pUl", guid->b);
 939         return out;
 940 }
 941
 942 extern void efi_init (void);
 943 extern void *efi_get_pal_addr (void);
 944 extern void efi_map_pal_code (void);
 945 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 946 extern void efi_gettimeofday (struct timespec *ts);
 947 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 948 #ifdef CONFIG_X86
 949 extern void efi_late_init(void);
 950 extern void efi_free_boot_services(void);
 951 extern efi_status_t efi_query_variable_store(u32 attributes,
 952                                              unsigned long size,
 953                                              bool nonblocking);
 954 extern void efi_find_mirror(void);
 955 #else
 956 static inline void efi_late_init(void) {}
 957 static inline void efi_free_boot_services(void) {}
 958
 959 static inline efi_status_t efi_query_variable_store(u32 attributes,
 960                                                     unsigned long size,
 961                                                     bool nonblocking)
 962 {
 963         return EFI_SUCCESS;
 964 }
 965 #endif
 966 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 967 extern int efi_config_init(efi_config_table_type_t *arch_tables);
 968 #ifdef CONFIG_EFI_ESRT
 969 extern void __init efi_esrt_init(void);
 970 #else
 971 static inline void efi_esrt_init(void) { }
 972 #endif
 973 extern int efi_config_parse_tables(void *config_tables, int count, int sz,
 974                                    efi_config_table_type_t *arch_tables);
 975 extern u64 efi_get_iobase (void);
 976 extern u32 efi_mem_type (unsigned long phys_addr);
 977 extern u64 efi_mem_attributes (unsigned long phys_addr);
 978 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 979 extern int __init efi_uart_console_only (void);
 980 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
 981 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 982 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 983                 struct resource *data_resource, struct resource *bss_resource);
 984 extern void efi_get_time(struct timespec *now);
 985 extern void efi_reserve_boot_services(void);
 986 extern int efi_get_fdt_params(struct efi_fdt_params *params);
 987 extern struct kobject *efi_kobj;
 988
 989 extern int efi_reboot_quirk_mode;
 990 extern bool efi_poweroff_required(void);
 991
 992 #ifdef CONFIG_EFI_FAKE_MEMMAP
 993 extern void __init efi_fake_memmap(void);
 994 #else
 995 static inline void efi_fake_memmap(void) { }
 996 #endif
 997
 998 /*
 999  * efi_memattr_perm_setter - arch specific callback function passed into
1000  *                           efi_memattr_apply_permissions() that updates the
1001  *                           mapping permissions described by the second
1002  *                           argument in the page tables referred to by the
1003  *                           first argument.
1004  */
1005 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
1006
1007 extern int efi_memattr_init(void);
1008 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
1009                                          efi_memattr_perm_setter fn);
1010
1011 /* Iterate through an efi_memory_map */
1012 #define for_each_efi_memory_desc_in_map(m, md)                             \
1013         for ((md) = (m)->map;                                              \
1014              (md) <= (efi_memory_desc_t *)((m)->map_end - (m)->desc_size); \
1015              (md) = (void *)(md) + (m)->desc_size)
1016
1017 /**
1018  * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1019  * @md: the efi_memory_desc_t * iterator
1020  *
1021  * Once the loop finishes @md must not be accessed.
1022  */
1023 #define for_each_efi_memory_desc(md) \
1024         for_each_efi_memory_desc_in_map(&efi.memmap, md)
1025
1026 /*
1027  * Format an EFI memory descriptor's type and attributes to a user-provided
1028  * character buffer, as per snprintf(), and return the buffer.
1029  */
1030 char * __init efi_md_typeattr_format(char *buf, size_t size,
1031                                      const efi_memory_desc_t *md);
1032
1033 /**
1034  * efi_range_is_wc - check the WC bit on an address range
1035  * @start: starting kvirt address
1036  * @len: length of range
1037  *
1038  * Consult the EFI memory map and make sure it's ok to set this range WC.
1039  * Returns true or false.
1040  */
1041 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
1042 {
1043         unsigned long i;
1044
1045         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
1046                 unsigned long paddr = __pa(start + i);
1047                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
1048                         return 0;
1049         }
1050         /* The range checked out */
1051         return 1;
1052 }
1053
1054 #ifdef CONFIG_EFI_PCDP
1055 extern int __init efi_setup_pcdp_console(char *);
1056 #endif
1057
1058 /*
1059  * We play games with efi_enabled so that the compiler will, if
1060  * possible, remove EFI-related code altogether.
1061  */
1062 #define EFI_BOOT                0       /* Were we booted from EFI? */
1063 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
1064 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
1065 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
1066 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
1067 #define EFI_PARAVIRT            6       /* Access is via a paravirt interface */
1068 #define EFI_ARCH_1              7       /* First arch-specific bit */
1069 #define EFI_DBG                 8       /* Print additional debug info at runtime */
1070 #define EFI_NX_PE_DATA          9       /* Can runtime data regions be mapped non-executable? */
1071
1072 #ifdef CONFIG_EFI
1073 /*
1074  * Test whether the above EFI_* bits are enabled.
1075  */
1076 static inline bool efi_enabled(int feature)
1077 {
1078         return test_bit(feature, &efi.flags) != 0;
1079 }
1080 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1081 #else
1082 static inline bool efi_enabled(int feature)
1083 {
1084         return false;
1085 }
1086 static inline void
1087 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1088
1089 static inline bool
1090 efi_capsule_pending(int *reset_type)
1091 {
1092         return false;
1093 }
1094 #endif
1095
1096 extern int efi_status_to_err(efi_status_t status);
1097
1098 /*
1099  * Variable Attributes
1100  */
1101 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
1102 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1103 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
1104 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1105 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1106 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1107 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
1108
1109 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
1110                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1111                                 EFI_VARIABLE_RUNTIME_ACCESS | \
1112                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1113                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1114                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1115                                 EFI_VARIABLE_APPEND_WRITE)
1116 /*
1117  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1118  * not including trailing NUL
1119  */
1120 #define EFI_VARIABLE_GUID_LEN 36
1121
1122 /*
1123  * The type of search to perform when calling boottime->locate_handle
1124  */
1125 #define EFI_LOCATE_ALL_HANDLES                  0
1126 #define EFI_LOCATE_BY_REGISTER_NOTIFY           1
1127 #define EFI_LOCATE_BY_PROTOCOL                  2
1128
1129 /*
1130  * EFI Device Path information
1131  */
1132 #define EFI_DEV_HW                      0x01
1133 #define  EFI_DEV_PCI                             1
1134 #define  EFI_DEV_PCCARD                          2
1135 #define  EFI_DEV_MEM_MAPPED                      3
1136 #define  EFI_DEV_VENDOR                          4
1137 #define  EFI_DEV_CONTROLLER                      5
1138 #define EFI_DEV_ACPI                    0x02
1139 #define   EFI_DEV_BASIC_ACPI                     1
1140 #define   EFI_DEV_EXPANDED_ACPI                  2
1141 #define EFI_DEV_MSG                     0x03
1142 #define   EFI_DEV_MSG_ATAPI                      1
1143 #define   EFI_DEV_MSG_SCSI                       2
1144 #define   EFI_DEV_MSG_FC                         3
1145 #define   EFI_DEV_MSG_1394                       4
1146 #define   EFI_DEV_MSG_USB                        5
1147 #define   EFI_DEV_MSG_USB_CLASS                 15
1148 #define   EFI_DEV_MSG_I20                        6
1149 #define   EFI_DEV_MSG_MAC                       11
1150 #define   EFI_DEV_MSG_IPV4                      12
1151 #define   EFI_DEV_MSG_IPV6                      13
1152 #define   EFI_DEV_MSG_INFINIBAND                 9
1153 #define   EFI_DEV_MSG_UART                      14
1154 #define   EFI_DEV_MSG_VENDOR                    10
1155 #define EFI_DEV_MEDIA                   0x04
1156 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
1157 #define   EFI_DEV_MEDIA_CDROM                    2
1158 #define   EFI_DEV_MEDIA_VENDOR                   3
1159 #define   EFI_DEV_MEDIA_FILE                     4
1160 #define   EFI_DEV_MEDIA_PROTOCOL                 5
1161 #define EFI_DEV_BIOS_BOOT               0x05
1162 #define EFI_DEV_END_PATH                0x7F
1163 #define EFI_DEV_END_PATH2               0xFF
1164 #define   EFI_DEV_END_INSTANCE                  0x01
1165 #define   EFI_DEV_END_ENTIRE                    0xFF
1166
1167 struct efi_generic_dev_path {
1168         u8 type;
1169         u8 sub_type;
1170         u16 length;
1171 } __attribute ((packed));
1172
1173 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1174 {
1175         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1176         *addr &= PAGE_MASK;
1177 }
1178
1179 /*
1180  * EFI Variable support.
1181  *
1182  * Different firmware drivers can expose their EFI-like variables using
1183  * the following.
1184  */
1185
1186 struct efivar_operations {
1187         efi_get_variable_t *get_variable;
1188         efi_get_next_variable_t *get_next_variable;
1189         efi_set_variable_t *set_variable;
1190         efi_set_variable_t *set_variable_nonblocking;
1191         efi_query_variable_store_t *query_variable_store;
1192 };
1193
1194 struct efivars {
1195         /*
1196          * ->lock protects two things:
1197          * 1) efivarfs_list and efivars_sysfs_list
1198          * 2) ->ops calls
1199          */
1200         spinlock_t lock;
1201         struct kset *kset;
1202         struct kobject *kobject;
1203         const struct efivar_operations *ops;
1204 };
1205
1206 /*
1207  * The maximum size of VariableName + Data = 1024
1208  * Therefore, it's reasonable to save that much
1209  * space in each part of the structure,
1210  * and we use a page for reading/writing.
1211  */
1212
1213 #define EFI_VAR_NAME_LEN        1024
1214
1215 struct efi_variable {
1216         efi_char16_t  VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1217         efi_guid_t    VendorGuid;
1218         unsigned long DataSize;
1219         __u8          Data[1024];
1220         efi_status_t  Status;
1221         __u32         Attributes;
1222 } __attribute__((packed));
1223
1224 struct efivar_entry {
1225         struct efi_variable var;
1226         struct list_head list;
1227         struct kobject kobj;
1228         bool scanning;
1229         bool deleting;
1230 };
1231
1232 struct efi_simple_text_output_protocol_32 {
1233         u32 reset;
1234         u32 output_string;
1235         u32 test_string;
1236 };
1237
1238 struct efi_simple_text_output_protocol_64 {
1239         u64 reset;
1240         u64 output_string;
1241         u64 test_string;
1242 };
1243
1244 struct efi_simple_text_output_protocol {
1245         void *reset;
1246         efi_status_t (*output_string)(void *, void *);
1247         void *test_string;
1248 };
1249
1250 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR               0
1251 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR               1
1252 #define PIXEL_BIT_MASK                                  2
1253 #define PIXEL_BLT_ONLY                                  3
1254 #define PIXEL_FORMAT_MAX                                4
1255
1256 struct efi_pixel_bitmask {
1257         u32 red_mask;
1258         u32 green_mask;
1259         u32 blue_mask;
1260         u32 reserved_mask;
1261 };
1262
1263 struct efi_graphics_output_mode_info {
1264         u32 version;
1265         u32 horizontal_resolution;
1266         u32 vertical_resolution;
1267         int pixel_format;
1268         struct efi_pixel_bitmask pixel_information;
1269         u32 pixels_per_scan_line;
1270 } __packed;
1271
1272 struct efi_graphics_output_protocol_mode_32 {
1273         u32 max_mode;
1274         u32 mode;
1275         u32 info;
1276         u32 size_of_info;
1277         u64 frame_buffer_base;
1278         u32 frame_buffer_size;
1279 } __packed;
1280
1281 struct efi_graphics_output_protocol_mode_64 {
1282         u32 max_mode;
1283         u32 mode;
1284         u64 info;
1285         u64 size_of_info;
1286         u64 frame_buffer_base;
1287         u64 frame_buffer_size;
1288 } __packed;
1289
1290 struct efi_graphics_output_protocol_mode {
1291         u32 max_mode;
1292         u32 mode;
1293         unsigned long info;
1294         unsigned long size_of_info;
1295         u64 frame_buffer_base;
1296         unsigned long frame_buffer_size;
1297 } __packed;
1298
1299 struct efi_graphics_output_protocol_32 {
1300         u32 query_mode;
1301         u32 set_mode;
1302         u32 blt;
1303         u32 mode;
1304 };
1305
1306 struct efi_graphics_output_protocol_64 {
1307         u64 query_mode;
1308         u64 set_mode;
1309         u64 blt;
1310         u64 mode;
1311 };
1312
1313 struct efi_graphics_output_protocol {
1314         unsigned long query_mode;
1315         unsigned long set_mode;
1316         unsigned long blt;
1317         struct efi_graphics_output_protocol_mode *mode;
1318 };
1319
1320 typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
1321         struct efi_graphics_output_protocol *, u32, unsigned long *,
1322         struct efi_graphics_output_mode_info **);
1323
1324 extern struct list_head efivar_sysfs_list;
1325
1326 static inline void
1327 efivar_unregister(struct efivar_entry *var)
1328 {
1329         kobject_put(&var->kobj);
1330 }
1331
1332 int efivars_register(struct efivars *efivars,
1333                      const struct efivar_operations *ops,
1334                      struct kobject *kobject);
1335 int efivars_unregister(struct efivars *efivars);
1336 struct kobject *efivars_kobject(void);
1337
1338 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1339                 void *data, bool duplicates, struct list_head *head);
1340
1341 void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1342 void efivar_entry_remove(struct efivar_entry *entry);
1343
1344 int __efivar_entry_delete(struct efivar_entry *entry);
1345 int efivar_entry_delete(struct efivar_entry *entry);
1346
1347 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1348 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1349                        unsigned long *size, void *data);
1350 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1351                      unsigned long *size, void *data);
1352 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1353                      unsigned long size, void *data, struct list_head *head);
1354 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1355                               unsigned long *size, void *data, bool *set);
1356 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1357                           bool block, unsigned long size, void *data);
1358
1359 void efivar_entry_iter_begin(void);
1360 void efivar_entry_iter_end(void);
1361
1362 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1363                         struct list_head *head, void *data,
1364                         struct efivar_entry **prev);
1365 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1366                       struct list_head *head, void *data);
1367
1368 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1369                                        struct list_head *head, bool remove);
1370
1371 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1372                      unsigned long data_size);
1373 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1374                                   size_t len);
1375
1376 extern struct work_struct efivar_work;
1377 void efivar_run_worker(void);
1378
1379 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1380 int efivars_sysfs_init(void);
1381
1382 #define EFIVARS_DATA_SIZE_MAX 1024
1383
1384 #endif /* CONFIG_EFI_VARS */
1385 extern bool efi_capsule_pending(int *reset_type);
1386
1387 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1388                                  size_t size, int *reset);
1389
1390 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1391                               struct page **pages);
1392
1393 #ifdef CONFIG_EFI_RUNTIME_MAP
1394 int efi_runtime_map_init(struct kobject *);
1395 void efi_runtime_map_setup(void *, int, u32);
1396 int efi_get_runtime_map_size(void);
1397 int efi_get_runtime_map_desc_size(void);
1398 int efi_runtime_map_copy(void *buf, size_t bufsz);
1399 #else
1400 static inline int efi_runtime_map_init(struct kobject *kobj)
1401 {
1402         return 0;
1403 }
1404
1405 static inline void
1406 efi_runtime_map_setup(void *map, int nr_entries, u32 desc_size) {}
1407
1408 static inline int efi_get_runtime_map_size(void)
1409 {
1410         return 0;
1411 }
1412
1413 static inline int efi_get_runtime_map_desc_size(void)
1414 {
1415         return 0;
1416 }
1417
1418 static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1419 {
1420         return 0;
1421 }
1422
1423 #endif
1424
1425 /* prototypes shared between arch specific and generic stub code */
1426
1427 #define pr_efi(sys_table, msg)     efi_printk(sys_table, "EFI stub: "msg)
1428 #define pr_efi_err(sys_table, msg) efi_printk(sys_table, "EFI stub: ERROR: "msg)
1429
1430 void efi_printk(efi_system_table_t *sys_table_arg, char *str);
1431
1432 void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
1433               unsigned long addr);
1434
1435 char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
1436                           efi_loaded_image_t *image, int *cmd_line_len);
1437
1438 efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
1439                                 efi_memory_desc_t **map,
1440                                 unsigned long *map_size,
1441                                 unsigned long *desc_size,
1442                                 u32 *desc_ver,
1443                                 unsigned long *key_ptr);
1444
1445 efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
1446                            unsigned long size, unsigned long align,
1447                            unsigned long *addr);
1448
1449 efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
1450                             unsigned long size, unsigned long align,
1451                             unsigned long *addr, unsigned long max);
1452
1453 efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
1454                                  unsigned long *image_addr,
1455                                  unsigned long image_size,
1456                                  unsigned long alloc_size,
1457                                  unsigned long preferred_addr,
1458                                  unsigned long alignment);
1459
1460 efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
1461                                   efi_loaded_image_t *image,
1462                                   char *cmd_line, char *option_string,
1463                                   unsigned long max_addr,
1464                                   unsigned long *load_addr,
1465                                   unsigned long *load_size);
1466
1467 efi_status_t efi_parse_options(char *cmdline);
1468
1469 efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
1470                            struct screen_info *si, efi_guid_t *proto,
1471                            unsigned long size);
1472
1473 bool efi_runtime_disabled(void);
1474 #endif /* _LINUX_EFI_H */