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/uuid.h>
  25 #include <linux/screen_info.h>
  26
  27 #include <asm/page.h>
  28
  29 #define EFI_SUCCESS             0
  30 #define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
  31 #define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
  32 #define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
  33 #define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
  34 #define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
  35 #define EFI_NOT_READY           ( 6 | (1UL << (BITS_PER_LONG-1)))
  36 #define EFI_DEVICE_ERROR        ( 7 | (1UL << (BITS_PER_LONG-1)))
  37 #define EFI_WRITE_PROTECTED     ( 8 | (1UL << (BITS_PER_LONG-1)))
  38 #define EFI_OUT_OF_RESOURCES    ( 9 | (1UL << (BITS_PER_LONG-1)))
  39 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  40 #define EFI_SECURITY_VIOLATION  (26 | (1UL << (BITS_PER_LONG-1)))
  41
  42 typedef unsigned long efi_status_t;
  43 typedef u8 efi_bool_t;
  44 typedef u16 efi_char16_t;               /* UNICODE character */
  45 typedef u64 efi_physical_addr_t;
  46 typedef void *efi_handle_t;
  47
  48 typedef uuid_le efi_guid_t;
  49
  50 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  51         UUID_LE(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
  52
  53 /*
  54  * Generic EFI table header
  55  */
  56 typedef struct {
  57         u64 signature;
  58         u32 revision;
  59         u32 headersize;
  60         u32 crc32;
  61         u32 reserved;
  62 } efi_table_hdr_t;
  63
  64 /*
  65  * Memory map descriptor:
  66  */
  67
  68 /* Memory types: */
  69 #define EFI_RESERVED_TYPE                0
  70 #define EFI_LOADER_CODE                  1
  71 #define EFI_LOADER_DATA                  2
  72 #define EFI_BOOT_SERVICES_CODE           3
  73 #define EFI_BOOT_SERVICES_DATA           4
  74 #define EFI_RUNTIME_SERVICES_CODE        5
  75 #define EFI_RUNTIME_SERVICES_DATA        6
  76 #define EFI_CONVENTIONAL_MEMORY          7
  77 #define EFI_UNUSABLE_MEMORY              8
  78 #define EFI_ACPI_RECLAIM_MEMORY          9
  79 #define EFI_ACPI_MEMORY_NVS             10
  80 #define EFI_MEMORY_MAPPED_IO            11
  81 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
  82 #define EFI_PAL_CODE                    13
  83 #define EFI_PERSISTENT_MEMORY           14
  84 #define EFI_MAX_MEMORY_TYPE             15
  85
  86 /* Attribute values: */
  87 #define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
  88 #define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
  89 #define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
  90 #define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
  91 #define EFI_MEMORY_UCE          ((u64)0x0000000000000010ULL)    /* uncached, exported */
  92 #define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
  93 #define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
  94 #define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
  95 #define EFI_MEMORY_NV           ((u64)0x0000000000008000ULL)    /* non-volatile */
  96 #define EFI_MEMORY_MORE_RELIABLE \
  97                                 ((u64)0x0000000000010000ULL)    /* higher reliability */
  98 #define EFI_MEMORY_RO           ((u64)0x0000000000020000ULL)    /* read-only */
  99 #define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
 100 #define EFI_MEMORY_DESCRIPTOR_VERSION   1
 101
 102 #define EFI_PAGE_SHIFT          12
 103 #define EFI_PAGE_SIZE           (1UL << EFI_PAGE_SHIFT)
 104
 105 typedef struct {
 106         u32 type;
 107         u32 pad;
 108         u64 phys_addr;
 109         u64 virt_addr;
 110         u64 num_pages;
 111         u64 attribute;
 112 } efi_memory_desc_t;
 113
 114 typedef struct {
 115         efi_guid_t guid;
 116         u32 headersize;
 117         u32 flags;
 118         u32 imagesize;
 119 } efi_capsule_header_t;
 120
 121 struct efi_boot_memmap {
 122         efi_memory_desc_t       **map;
 123         unsigned long           *map_size;
 124         unsigned long           *desc_size;
 125         u32                     *desc_ver;
 126         unsigned long           *key_ptr;
 127         unsigned long           *buff_size;
 128 };
 129
 130 /*
 131  * EFI capsule flags
 132  */
 133 #define EFI_CAPSULE_PERSIST_ACROSS_RESET        0x00010000
 134 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE       0x00020000
 135 #define EFI_CAPSULE_INITIATE_RESET              0x00040000
 136
 137 /*
 138  * Allocation types for calls to boottime->allocate_pages.
 139  */
 140 #define EFI_ALLOCATE_ANY_PAGES          0
 141 #define EFI_ALLOCATE_MAX_ADDRESS        1
 142 #define EFI_ALLOCATE_ADDRESS            2
 143 #define EFI_MAX_ALLOCATE_TYPE           3
 144
 145 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
 146
 147 /*
 148  * Types and defines for Time Services
 149  */
 150 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 151 #define EFI_TIME_IN_DAYLIGHT     0x2
 152 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 153
 154 typedef struct {
 155         u16 year;
 156         u8 month;
 157         u8 day;
 158         u8 hour;
 159         u8 minute;
 160         u8 second;
 161         u8 pad1;
 162         u32 nanosecond;
 163         s16 timezone;
 164         u8 daylight;
 165         u8 pad2;
 166 } efi_time_t;
 167
 168 typedef struct {
 169         u32 resolution;
 170         u32 accuracy;
 171         u8 sets_to_zero;
 172 } efi_time_cap_t;
 173
 174 typedef struct {
 175         efi_table_hdr_t hdr;
 176         u32 raise_tpl;
 177         u32 restore_tpl;
 178         u32 allocate_pages;
 179         u32 free_pages;
 180         u32 get_memory_map;
 181         u32 allocate_pool;
 182         u32 free_pool;
 183         u32 create_event;
 184         u32 set_timer;
 185         u32 wait_for_event;
 186         u32 signal_event;
 187         u32 close_event;
 188         u32 check_event;
 189         u32 install_protocol_interface;
 190         u32 reinstall_protocol_interface;
 191         u32 uninstall_protocol_interface;
 192         u32 handle_protocol;
 193         u32 __reserved;
 194         u32 register_protocol_notify;
 195         u32 locate_handle;
 196         u32 locate_device_path;
 197         u32 install_configuration_table;
 198         u32 load_image;
 199         u32 start_image;
 200         u32 exit;
 201         u32 unload_image;
 202         u32 exit_boot_services;
 203         u32 get_next_monotonic_count;
 204         u32 stall;
 205         u32 set_watchdog_timer;
 206         u32 connect_controller;
 207         u32 disconnect_controller;
 208         u32 open_protocol;
 209         u32 close_protocol;
 210         u32 open_protocol_information;
 211         u32 protocols_per_handle;
 212         u32 locate_handle_buffer;
 213         u32 locate_protocol;
 214         u32 install_multiple_protocol_interfaces;
 215         u32 uninstall_multiple_protocol_interfaces;
 216         u32 calculate_crc32;
 217         u32 copy_mem;
 218         u32 set_mem;
 219         u32 create_event_ex;
 220 } __packed efi_boot_services_32_t;
 221
 222 typedef struct {
 223         efi_table_hdr_t hdr;
 224         u64 raise_tpl;
 225         u64 restore_tpl;
 226         u64 allocate_pages;
 227         u64 free_pages;
 228         u64 get_memory_map;
 229         u64 allocate_pool;
 230         u64 free_pool;
 231         u64 create_event;
 232         u64 set_timer;
 233         u64 wait_for_event;
 234         u64 signal_event;
 235         u64 close_event;
 236         u64 check_event;
 237         u64 install_protocol_interface;
 238         u64 reinstall_protocol_interface;
 239         u64 uninstall_protocol_interface;
 240         u64 handle_protocol;
 241         u64 __reserved;
 242         u64 register_protocol_notify;
 243         u64 locate_handle;
 244         u64 locate_device_path;
 245         u64 install_configuration_table;
 246         u64 load_image;
 247         u64 start_image;
 248         u64 exit;
 249         u64 unload_image;
 250         u64 exit_boot_services;
 251         u64 get_next_monotonic_count;
 252         u64 stall;
 253         u64 set_watchdog_timer;
 254         u64 connect_controller;
 255         u64 disconnect_controller;
 256         u64 open_protocol;
 257         u64 close_protocol;
 258         u64 open_protocol_information;
 259         u64 protocols_per_handle;
 260         u64 locate_handle_buffer;
 261         u64 locate_protocol;
 262         u64 install_multiple_protocol_interfaces;
 263         u64 uninstall_multiple_protocol_interfaces;
 264         u64 calculate_crc32;
 265         u64 copy_mem;
 266         u64 set_mem;
 267         u64 create_event_ex;
 268 } __packed efi_boot_services_64_t;
 269
 270 /*
 271  * EFI Boot Services table
 272  */
 273 typedef struct {
 274         efi_table_hdr_t hdr;
 275         void *raise_tpl;
 276         void *restore_tpl;
 277         efi_status_t (*allocate_pages)(int, int, unsigned long,
 278                                        efi_physical_addr_t *);
 279         efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
 280         efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
 281                                        unsigned long *, u32 *);
 282         efi_status_t (*allocate_pool)(int, unsigned long, void **);
 283         efi_status_t (*free_pool)(void *);
 284         void *create_event;
 285         void *set_timer;
 286         void *wait_for_event;
 287         void *signal_event;
 288         void *close_event;
 289         void *check_event;
 290         void *install_protocol_interface;
 291         void *reinstall_protocol_interface;
 292         void *uninstall_protocol_interface;
 293         efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
 294         void *__reserved;
 295         void *register_protocol_notify;
 296         efi_status_t (*locate_handle)(int, efi_guid_t *, void *,
 297                                       unsigned long *, efi_handle_t *);
 298         void *locate_device_path;
 299         efi_status_t (*install_configuration_table)(efi_guid_t *, void *);
 300         void *load_image;
 301         void *start_image;
 302         void *exit;
 303         void *unload_image;
 304         efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
 305         void *get_next_monotonic_count;
 306         void *stall;
 307         void *set_watchdog_timer;
 308         void *connect_controller;
 309         void *disconnect_controller;
 310         void *open_protocol;
 311         void *close_protocol;
 312         void *open_protocol_information;
 313         void *protocols_per_handle;
 314         void *locate_handle_buffer;
 315         efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
 316         void *install_multiple_protocol_interfaces;
 317         void *uninstall_multiple_protocol_interfaces;
 318         void *calculate_crc32;
 319         void *copy_mem;
 320         void *set_mem;
 321         void *create_event_ex;
 322 } efi_boot_services_t;
 323
 324 typedef enum {
 325         EfiPciIoWidthUint8,
 326         EfiPciIoWidthUint16,
 327         EfiPciIoWidthUint32,
 328         EfiPciIoWidthUint64,
 329         EfiPciIoWidthFifoUint8,
 330         EfiPciIoWidthFifoUint16,
 331         EfiPciIoWidthFifoUint32,
 332         EfiPciIoWidthFifoUint64,
 333         EfiPciIoWidthFillUint8,
 334         EfiPciIoWidthFillUint16,
 335         EfiPciIoWidthFillUint32,
 336         EfiPciIoWidthFillUint64,
 337         EfiPciIoWidthMaximum
 338 } EFI_PCI_IO_PROTOCOL_WIDTH;
 339
 340 typedef enum {
 341         EfiPciIoAttributeOperationGet,
 342         EfiPciIoAttributeOperationSet,
 343         EfiPciIoAttributeOperationEnable,
 344         EfiPciIoAttributeOperationDisable,
 345         EfiPciIoAttributeOperationSupported,
 346     EfiPciIoAttributeOperationMaximum
 347 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
 348
 349 typedef struct {
 350         u32 read;
 351         u32 write;
 352 } efi_pci_io_protocol_access_32_t;
 353
 354 typedef struct {
 355         u64 read;
 356         u64 write;
 357 } efi_pci_io_protocol_access_64_t;
 358
 359 typedef struct {
 360         void *read;
 361         void *write;
 362 } efi_pci_io_protocol_access_t;
 363
 364 typedef struct {
 365         u32 poll_mem;
 366         u32 poll_io;
 367         efi_pci_io_protocol_access_32_t mem;
 368         efi_pci_io_protocol_access_32_t io;
 369         efi_pci_io_protocol_access_32_t pci;
 370         u32 copy_mem;
 371         u32 map;
 372         u32 unmap;
 373         u32 allocate_buffer;
 374         u32 free_buffer;
 375         u32 flush;
 376         u32 get_location;
 377         u32 attributes;
 378         u32 get_bar_attributes;
 379         u32 set_bar_attributes;
 380         uint64_t romsize;
 381         void *romimage;
 382 } efi_pci_io_protocol_32;
 383
 384 typedef struct {
 385         u64 poll_mem;
 386         u64 poll_io;
 387         efi_pci_io_protocol_access_64_t mem;
 388         efi_pci_io_protocol_access_64_t io;
 389         efi_pci_io_protocol_access_64_t pci;
 390         u64 copy_mem;
 391         u64 map;
 392         u64 unmap;
 393         u64 allocate_buffer;
 394         u64 free_buffer;
 395         u64 flush;
 396         u64 get_location;
 397         u64 attributes;
 398         u64 get_bar_attributes;
 399         u64 set_bar_attributes;
 400         uint64_t romsize;
 401         void *romimage;
 402 } efi_pci_io_protocol_64;
 403
 404 typedef struct {
 405         void *poll_mem;
 406         void *poll_io;
 407         efi_pci_io_protocol_access_t mem;
 408         efi_pci_io_protocol_access_t io;
 409         efi_pci_io_protocol_access_t pci;
 410         void *copy_mem;
 411         void *map;
 412         void *unmap;
 413         void *allocate_buffer;
 414         void *free_buffer;
 415         void *flush;
 416         void *get_location;
 417         void *attributes;
 418         void *get_bar_attributes;
 419         void *set_bar_attributes;
 420         uint64_t romsize;
 421         void *romimage;
 422 } efi_pci_io_protocol;
 423
 424 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
 425 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
 426 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
 427 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
 428 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
 429 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
 430 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
 431 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
 432 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
 433 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
 434 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
 435 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
 436 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
 437 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
 438 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
 439 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
 440 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
 441 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
 442 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
 443
 444 /*
 445  * Types and defines for EFI ResetSystem
 446  */
 447 #define EFI_RESET_COLD 0
 448 #define EFI_RESET_WARM 1
 449 #define EFI_RESET_SHUTDOWN 2
 450
 451 /*
 452  * EFI Runtime Services table
 453  */
 454 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 455 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 456
 457 typedef struct {
 458         efi_table_hdr_t hdr;
 459         u32 get_time;
 460         u32 set_time;
 461         u32 get_wakeup_time;
 462         u32 set_wakeup_time;
 463         u32 set_virtual_address_map;
 464         u32 convert_pointer;
 465         u32 get_variable;
 466         u32 get_next_variable;
 467         u32 set_variable;
 468         u32 get_next_high_mono_count;
 469         u32 reset_system;
 470         u32 update_capsule;
 471         u32 query_capsule_caps;
 472         u32 query_variable_info;
 473 } efi_runtime_services_32_t;
 474
 475 typedef struct {
 476         efi_table_hdr_t hdr;
 477         u64 get_time;
 478         u64 set_time;
 479         u64 get_wakeup_time;
 480         u64 set_wakeup_time;
 481         u64 set_virtual_address_map;
 482         u64 convert_pointer;
 483         u64 get_variable;
 484         u64 get_next_variable;
 485         u64 set_variable;
 486         u64 get_next_high_mono_count;
 487         u64 reset_system;
 488         u64 update_capsule;
 489         u64 query_capsule_caps;
 490         u64 query_variable_info;
 491 } efi_runtime_services_64_t;
 492
 493 typedef struct {
 494         efi_table_hdr_t hdr;
 495         void *get_time;
 496         void *set_time;
 497         void *get_wakeup_time;
 498         void *set_wakeup_time;
 499         void *set_virtual_address_map;
 500         void *convert_pointer;
 501         void *get_variable;
 502         void *get_next_variable;
 503         void *set_variable;
 504         void *get_next_high_mono_count;
 505         void *reset_system;
 506         void *update_capsule;
 507         void *query_capsule_caps;
 508         void *query_variable_info;
 509 } efi_runtime_services_t;
 510
 511 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 512 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 513 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 514                                             efi_time_t *tm);
 515 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 516 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 517                                          unsigned long *data_size, void *data);
 518 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 519                                               efi_guid_t *vendor);
 520 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 521                                          u32 attr, unsigned long data_size,
 522                                          void *data);
 523 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 524 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 525                                  unsigned long data_size, efi_char16_t *data);
 526 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 527                                                 unsigned long descriptor_size,
 528                                                 u32 descriptor_version,
 529                                                 efi_memory_desc_t *virtual_map);
 530 typedef efi_status_t efi_query_variable_info_t(u32 attr,
 531                                                u64 *storage_space,
 532                                                u64 *remaining_space,
 533                                                u64 *max_variable_size);
 534 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 535                                           unsigned long count,
 536                                           unsigned long sg_list);
 537 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 538                                               unsigned long count,
 539                                               u64 *max_size,
 540                                               int *reset_type);
 541 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
 542                                                 unsigned long size,
 543                                                 bool nonblocking);
 544
 545 void efi_native_runtime_setup(void);
 546
 547 /*
 548  * EFI Configuration Table and GUID definitions
 549  *
 550  * These are all defined in a single line to make them easier to
 551  * grep for and to see them at a glance - while still having a
 552  * similar structure to the definitions in the spec.
 553  *
 554  * Here's how they are structured:
 555  *
 556  * GUID: 12345678-1234-1234-1234-123456789012
 557  * Spec:
 558  *      #define EFI_SOME_PROTOCOL_GUID \
 559  *        {0x12345678,0x1234,0x1234,\
 560  *          {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
 561  * Here:
 562  *      #define SOME_PROTOCOL_GUID              EFI_GUID(0x12345678, 0x1234, 0x1234,  0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
 563  *                                      ^ tabs                                      ^extra space
 564  *
 565  * Note that the 'extra space' separates the values at the same place
 566  * where the UEFI SPEC breaks the line.
 567  */
 568 #define NULL_GUID                               EFI_GUID(0x00000000, 0x0000, 0x0000,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
 569 #define MPS_TABLE_GUID                          EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 570 #define ACPI_TABLE_GUID                         EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 571 #define ACPI_20_TABLE_GUID                      EFI_GUID(0x8868e871, 0xe4f1, 0x11d3,  0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
 572 #define SMBIOS_TABLE_GUID                       EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 573 #define SMBIOS3_TABLE_GUID                      EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c,  0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
 574 #define SAL_SYSTEM_TABLE_GUID                   EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 575 #define HCDP_TABLE_GUID                         EFI_GUID(0xf951938d, 0x620b, 0x42ef,  0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
 576 #define UGA_IO_PROTOCOL_GUID                    EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b,  0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
 577 #define EFI_GLOBAL_VARIABLE_GUID                EFI_GUID(0x8be4df61, 0x93ca, 0x11d2,  0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
 578 #define UV_SYSTEM_TABLE_GUID                    EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd,  0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
 579 #define LINUX_EFI_CRASH_GUID                    EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc,  0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
 580 #define LOADED_IMAGE_PROTOCOL_GUID              EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2,  0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 581 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID       EFI_GUID(0x9042a9de, 0x23dc, 0x4a38,  0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
 582 #define EFI_UGA_PROTOCOL_GUID                   EFI_GUID(0x982c298b, 0xf4fa, 0x41cb,  0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
 583 #define EFI_PCI_IO_PROTOCOL_GUID                EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5,  0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
 584 #define EFI_FILE_INFO_ID                        EFI_GUID(0x09576e92, 0x6d3f, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 585 #define EFI_SYSTEM_RESOURCE_TABLE_GUID          EFI_GUID(0xb122a263, 0x3661, 0x4f68,  0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
 586 #define EFI_FILE_SYSTEM_GUID                    EFI_GUID(0x964e5b22, 0x6459, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 587 #define DEVICE_TREE_GUID                        EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5,  0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
 588 #define EFI_PROPERTIES_TABLE_GUID               EFI_GUID(0x880aaca3, 0x4adc, 0x4a04,  0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
 589 #define EFI_RNG_PROTOCOL_GUID                   EFI_GUID(0x3152bca5, 0xeade, 0x433d,  0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
 590 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID        EFI_GUID(0xdcfa911d, 0x26eb, 0x469f,  0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
 591 #define EFI_CONSOLE_OUT_DEVICE_GUID             EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4,  0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 592
 593 /*
 594  * This GUID is used to pass to the kernel proper the struct screen_info
 595  * structure that was populated by the stub based on the GOP protocol instance
 596  * associated with ConOut
 597  */
 598 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID    EFI_GUID(0xe03fc20a, 0x85dc, 0x406e,  0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
 599 #define LINUX_EFI_LOADER_ENTRY_GUID             EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf,  0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
 600
 601 typedef struct {
 602         efi_guid_t guid;
 603         u64 table;
 604 } efi_config_table_64_t;
 605
 606 typedef struct {
 607         efi_guid_t guid;
 608         u32 table;
 609 } efi_config_table_32_t;
 610
 611 typedef struct {
 612         efi_guid_t guid;
 613         unsigned long table;
 614 } efi_config_table_t;
 615
 616 typedef struct {
 617         efi_guid_t guid;
 618         const char *name;
 619         unsigned long *ptr;
 620 } efi_config_table_type_t;
 621
 622 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 623
 624 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 625 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 626 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 627 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 628 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 629 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 630
 631 typedef struct {
 632         efi_table_hdr_t hdr;
 633         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 634         u32 fw_revision;
 635         u32 __pad1;
 636         u64 con_in_handle;
 637         u64 con_in;
 638         u64 con_out_handle;
 639         u64 con_out;
 640         u64 stderr_handle;
 641         u64 stderr;
 642         u64 runtime;
 643         u64 boottime;
 644         u32 nr_tables;
 645         u32 __pad2;
 646         u64 tables;
 647 } efi_system_table_64_t;
 648
 649 typedef struct {
 650         efi_table_hdr_t hdr;
 651         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 652         u32 fw_revision;
 653         u32 con_in_handle;
 654         u32 con_in;
 655         u32 con_out_handle;
 656         u32 con_out;
 657         u32 stderr_handle;
 658         u32 stderr;
 659         u32 runtime;
 660         u32 boottime;
 661         u32 nr_tables;
 662         u32 tables;
 663 } efi_system_table_32_t;
 664
 665 typedef struct {
 666         efi_table_hdr_t hdr;
 667         unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 668         u32 fw_revision;
 669         unsigned long con_in_handle;
 670         unsigned long con_in;
 671         unsigned long con_out_handle;
 672         unsigned long con_out;
 673         unsigned long stderr_handle;
 674         unsigned long stderr;
 675         efi_runtime_services_t *runtime;
 676         efi_boot_services_t *boottime;
 677         unsigned long nr_tables;
 678         unsigned long tables;
 679 } efi_system_table_t;
 680
 681 struct efi_memory_map {
 682         phys_addr_t phys_map;
 683         void *map;
 684         void *map_end;
 685         int nr_map;
 686         unsigned long desc_version;
 687         unsigned long desc_size;
 688 };
 689
 690 struct efi_fdt_params {
 691         u64 system_table;
 692         u64 mmap;
 693         u32 mmap_size;
 694         u32 desc_size;
 695         u32 desc_ver;
 696 };
 697
 698 typedef struct {
 699         u32 revision;
 700         u32 parent_handle;
 701         u32 system_table;
 702         u32 device_handle;
 703         u32 file_path;
 704         u32 reserved;
 705         u32 load_options_size;
 706         u32 load_options;
 707         u32 image_base;
 708         __aligned_u64 image_size;
 709         unsigned int image_code_type;
 710         unsigned int image_data_type;
 711         unsigned long unload;
 712 } efi_loaded_image_32_t;
 713
 714 typedef struct {
 715         u32 revision;
 716         u64 parent_handle;
 717         u64 system_table;
 718         u64 device_handle;
 719         u64 file_path;
 720         u64 reserved;
 721         u32 load_options_size;
 722         u64 load_options;
 723         u64 image_base;
 724         __aligned_u64 image_size;
 725         unsigned int image_code_type;
 726         unsigned int image_data_type;
 727         unsigned long unload;
 728 } efi_loaded_image_64_t;
 729
 730 typedef struct {
 731         u32 revision;
 732         void *parent_handle;
 733         efi_system_table_t *system_table;
 734         void *device_handle;
 735         void *file_path;
 736         void *reserved;
 737         u32 load_options_size;
 738         void *load_options;
 739         void *image_base;
 740         __aligned_u64 image_size;
 741         unsigned int image_code_type;
 742         unsigned int image_data_type;
 743         unsigned long unload;
 744 } efi_loaded_image_t;
 745
 746
 747 typedef struct {
 748         u64 size;
 749         u64 file_size;
 750         u64 phys_size;
 751         efi_time_t create_time;
 752         efi_time_t last_access_time;
 753         efi_time_t modification_time;
 754         __aligned_u64 attribute;
 755         efi_char16_t filename[1];
 756 } efi_file_info_t;
 757
 758 typedef struct {
 759         u64 revision;
 760         u32 open;
 761         u32 close;
 762         u32 delete;
 763         u32 read;
 764         u32 write;
 765         u32 get_position;
 766         u32 set_position;
 767         u32 get_info;
 768         u32 set_info;
 769         u32 flush;
 770 } efi_file_handle_32_t;
 771
 772 typedef struct {
 773         u64 revision;
 774         u64 open;
 775         u64 close;
 776         u64 delete;
 777         u64 read;
 778         u64 write;
 779         u64 get_position;
 780         u64 set_position;
 781         u64 get_info;
 782         u64 set_info;
 783         u64 flush;
 784 } efi_file_handle_64_t;
 785
 786 typedef struct _efi_file_handle {
 787         u64 revision;
 788         efi_status_t (*open)(struct _efi_file_handle *,
 789                              struct _efi_file_handle **,
 790                              efi_char16_t *, u64, u64);
 791         efi_status_t (*close)(struct _efi_file_handle *);
 792         void *delete;
 793         efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
 794                              void *);
 795         void *write;
 796         void *get_position;
 797         void *set_position;
 798         efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
 799                         unsigned long *, void *);
 800         void *set_info;
 801         void *flush;
 802 } efi_file_handle_t;
 803
 804 typedef struct _efi_file_io_interface {
 805         u64 revision;
 806         int (*open_volume)(struct _efi_file_io_interface *,
 807                            efi_file_handle_t **);
 808 } efi_file_io_interface_t;
 809
 810 #define EFI_FILE_MODE_READ      0x0000000000000001
 811 #define EFI_FILE_MODE_WRITE     0x0000000000000002
 812 #define EFI_FILE_MODE_CREATE    0x8000000000000000
 813
 814 typedef struct {
 815         u32 version;
 816         u32 length;
 817         u64 memory_protection_attribute;
 818 } efi_properties_table_t;
 819
 820 #define EFI_PROPERTIES_TABLE_VERSION    0x00010000
 821 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
 822
 823 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 824
 825 typedef struct {
 826         u32 version;
 827         u32 num_entries;
 828         u32 desc_size;
 829         u32 reserved;
 830         efi_memory_desc_t entry[0];
 831 } efi_memory_attributes_table_t;
 832
 833 /*
 834  * All runtime access to EFI goes through this structure:
 835  */
 836 extern struct efi {
 837         efi_system_table_t *systab;     /* EFI system table */
 838         unsigned int runtime_version;   /* Runtime services version */
 839         unsigned long mps;              /* MPS table */
 840         unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
 841         unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
 842         unsigned long smbios;           /* SMBIOS table (32 bit entry point) */
 843         unsigned long smbios3;          /* SMBIOS table (64 bit entry point) */
 844         unsigned long sal_systab;       /* SAL system table */
 845         unsigned long boot_info;        /* boot info table */
 846         unsigned long hcdp;             /* HCDP table */
 847         unsigned long uga;              /* UGA table */
 848         unsigned long uv_systab;        /* UV system table */
 849         unsigned long fw_vendor;        /* fw_vendor */
 850         unsigned long runtime;          /* runtime table */
 851         unsigned long config_table;     /* config tables */
 852         unsigned long esrt;             /* ESRT table */
 853         unsigned long properties_table; /* properties table */
 854         unsigned long mem_attr_table;   /* memory attributes table */
 855         efi_get_time_t *get_time;
 856         efi_set_time_t *set_time;
 857         efi_get_wakeup_time_t *get_wakeup_time;
 858         efi_set_wakeup_time_t *set_wakeup_time;
 859         efi_get_variable_t *get_variable;
 860         efi_get_next_variable_t *get_next_variable;
 861         efi_set_variable_t *set_variable;
 862         efi_set_variable_t *set_variable_nonblocking;
 863         efi_query_variable_info_t *query_variable_info;
 864         efi_query_variable_info_t *query_variable_info_nonblocking;
 865         efi_update_capsule_t *update_capsule;
 866         efi_query_capsule_caps_t *query_capsule_caps;
 867         efi_get_next_high_mono_count_t *get_next_high_mono_count;
 868         efi_reset_system_t *reset_system;
 869         efi_set_virtual_address_map_t *set_virtual_address_map;
 870         struct efi_memory_map memmap;
 871         unsigned long flags;
 872 } efi;
 873
 874 static inline int
 875 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 876 {
 877         return memcmp(&left, &right, sizeof (efi_guid_t));
 878 }
 879
 880 static inline char *
 881 efi_guid_to_str(efi_guid_t *guid, char *out)
 882 {
 883         sprintf(out, "%pUl", guid->b);
 884         return out;
 885 }
 886
 887 extern void efi_init (void);
 888 extern void *efi_get_pal_addr (void);
 889 extern void efi_map_pal_code (void);
 890 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 891 extern void efi_gettimeofday (struct timespec64 *ts);
 892 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 893 #ifdef CONFIG_X86
 894 extern void efi_late_init(void);
 895 extern void efi_free_boot_services(void);
 896 extern efi_status_t efi_query_variable_store(u32 attributes,
 897                                              unsigned long size,
 898                                              bool nonblocking);
 899 extern void efi_find_mirror(void);
 900 #else
 901 static inline void efi_late_init(void) {}
 902 static inline void efi_free_boot_services(void) {}
 903
 904 static inline efi_status_t efi_query_variable_store(u32 attributes,
 905                                                     unsigned long size,
 906                                                     bool nonblocking)
 907 {
 908         return EFI_SUCCESS;
 909 }
 910 #endif
 911 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 912 extern int efi_config_init(efi_config_table_type_t *arch_tables);
 913 #ifdef CONFIG_EFI_ESRT
 914 extern void __init efi_esrt_init(void);
 915 #else
 916 static inline void efi_esrt_init(void) { }
 917 #endif
 918 extern int efi_config_parse_tables(void *config_tables, int count, int sz,
 919                                    efi_config_table_type_t *arch_tables);
 920 extern u64 efi_get_iobase (void);
 921 extern u32 efi_mem_type (unsigned long phys_addr);
 922 extern u64 efi_mem_attributes (unsigned long phys_addr);
 923 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 924 extern int __init efi_uart_console_only (void);
 925 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
 926 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 927 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 928                 struct resource *data_resource, struct resource *bss_resource);
 929 extern void efi_reserve_boot_services(void);
 930 extern int efi_get_fdt_params(struct efi_fdt_params *params);
 931 extern struct kobject *efi_kobj;
 932
 933 extern int efi_reboot_quirk_mode;
 934 extern bool efi_poweroff_required(void);
 935
 936 #ifdef CONFIG_EFI_FAKE_MEMMAP
 937 extern void __init efi_fake_memmap(void);
 938 #else
 939 static inline void efi_fake_memmap(void) { }
 940 #endif
 941
 942 /*
 943  * efi_memattr_perm_setter - arch specific callback function passed into
 944  *                           efi_memattr_apply_permissions() that updates the
 945  *                           mapping permissions described by the second
 946  *                           argument in the page tables referred to by the
 947  *                           first argument.
 948  */
 949 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
 950
 951 extern int efi_memattr_init(void);
 952 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
 953                                          efi_memattr_perm_setter fn);
 954
 955 /* Iterate through an efi_memory_map */
 956 #define for_each_efi_memory_desc_in_map(m, md)                             \
 957         for ((md) = (m)->map;                                              \
 958              (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end;      \
 959              (md) = (void *)(md) + (m)->desc_size)
 960
 961 /**
 962  * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
 963  * @md: the efi_memory_desc_t * iterator
 964  *
 965  * Once the loop finishes @md must not be accessed.
 966  */
 967 #define for_each_efi_memory_desc(md) \
 968         for_each_efi_memory_desc_in_map(&efi.memmap, md)
 969
 970 /*
 971  * Format an EFI memory descriptor's type and attributes to a user-provided
 972  * character buffer, as per snprintf(), and return the buffer.
 973  */
 974 char * __init efi_md_typeattr_format(char *buf, size_t size,
 975                                      const efi_memory_desc_t *md);
 976
 977 /**
 978  * efi_range_is_wc - check the WC bit on an address range
 979  * @start: starting kvirt address
 980  * @len: length of range
 981  *
 982  * Consult the EFI memory map and make sure it's ok to set this range WC.
 983  * Returns true or false.
 984  */
 985 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 986 {
 987         unsigned long i;
 988
 989         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 990                 unsigned long paddr = __pa(start + i);
 991                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 992                         return 0;
 993         }
 994         /* The range checked out */
 995         return 1;
 996 }
 997
 998 #ifdef CONFIG_EFI_PCDP
 999 extern int __init efi_setup_pcdp_console(char *);
1000 #endif
1001
1002 /*
1003  * We play games with efi_enabled so that the compiler will, if
1004  * possible, remove EFI-related code altogether.
1005  */
1006 #define EFI_BOOT                0       /* Were we booted from EFI? */
1007 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
1008 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
1009 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
1010 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
1011 #define EFI_PARAVIRT            6       /* Access is via a paravirt interface */
1012 #define EFI_ARCH_1              7       /* First arch-specific bit */
1013 #define EFI_DBG                 8       /* Print additional debug info at runtime */
1014 #define EFI_NX_PE_DATA          9       /* Can runtime data regions be mapped non-executable? */
1015
1016 #ifdef CONFIG_EFI
1017 /*
1018  * Test whether the above EFI_* bits are enabled.
1019  */
1020 static inline bool efi_enabled(int feature)
1021 {
1022         return test_bit(feature, &efi.flags) != 0;
1023 }
1024 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1025 #else
1026 static inline bool efi_enabled(int feature)
1027 {
1028         return false;
1029 }
1030 static inline void
1031 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1032
1033 static inline bool
1034 efi_capsule_pending(int *reset_type)
1035 {
1036         return false;
1037 }
1038 #endif
1039
1040 extern int efi_status_to_err(efi_status_t status);
1041
1042 /*
1043  * Variable Attributes
1044  */
1045 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
1046 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1047 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
1048 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1049 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1050 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1051 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
1052
1053 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
1054                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1055                                 EFI_VARIABLE_RUNTIME_ACCESS | \
1056                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1057                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1058                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1059                                 EFI_VARIABLE_APPEND_WRITE)
1060 /*
1061  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1062  * not including trailing NUL
1063  */
1064 #define EFI_VARIABLE_GUID_LEN   UUID_STRING_LEN
1065
1066 /*
1067  * The type of search to perform when calling boottime->locate_handle
1068  */
1069 #define EFI_LOCATE_ALL_HANDLES                  0
1070 #define EFI_LOCATE_BY_REGISTER_NOTIFY           1
1071 #define EFI_LOCATE_BY_PROTOCOL                  2
1072
1073 /*
1074  * EFI Device Path information
1075  */
1076 #define EFI_DEV_HW                      0x01
1077 #define  EFI_DEV_PCI                             1
1078 #define  EFI_DEV_PCCARD                          2
1079 #define  EFI_DEV_MEM_MAPPED                      3
1080 #define  EFI_DEV_VENDOR                          4
1081 #define  EFI_DEV_CONTROLLER                      5
1082 #define EFI_DEV_ACPI                    0x02
1083 #define   EFI_DEV_BASIC_ACPI                     1
1084 #define   EFI_DEV_EXPANDED_ACPI                  2
1085 #define EFI_DEV_MSG                     0x03
1086 #define   EFI_DEV_MSG_ATAPI                      1
1087 #define   EFI_DEV_MSG_SCSI                       2
1088 #define   EFI_DEV_MSG_FC                         3
1089 #define   EFI_DEV_MSG_1394                       4
1090 #define   EFI_DEV_MSG_USB                        5
1091 #define   EFI_DEV_MSG_USB_CLASS                 15
1092 #define   EFI_DEV_MSG_I20                        6
1093 #define   EFI_DEV_MSG_MAC                       11
1094 #define   EFI_DEV_MSG_IPV4                      12
1095 #define   EFI_DEV_MSG_IPV6                      13
1096 #define   EFI_DEV_MSG_INFINIBAND                 9
1097 #define   EFI_DEV_MSG_UART                      14
1098 #define   EFI_DEV_MSG_VENDOR                    10
1099 #define EFI_DEV_MEDIA                   0x04
1100 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
1101 #define   EFI_DEV_MEDIA_CDROM                    2
1102 #define   EFI_DEV_MEDIA_VENDOR                   3
1103 #define   EFI_DEV_MEDIA_FILE                     4
1104 #define   EFI_DEV_MEDIA_PROTOCOL                 5
1105 #define EFI_DEV_BIOS_BOOT               0x05
1106 #define EFI_DEV_END_PATH                0x7F
1107 #define EFI_DEV_END_PATH2               0xFF
1108 #define   EFI_DEV_END_INSTANCE                  0x01
1109 #define   EFI_DEV_END_ENTIRE                    0xFF
1110
1111 struct efi_generic_dev_path {
1112         u8 type;
1113         u8 sub_type;
1114         u16 length;
1115 } __attribute ((packed));
1116
1117 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1118 {
1119         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1120         *addr &= PAGE_MASK;
1121 }
1122
1123 /*
1124  * EFI Variable support.
1125  *
1126  * Different firmware drivers can expose their EFI-like variables using
1127  * the following.
1128  */
1129
1130 struct efivar_operations {
1131         efi_get_variable_t *get_variable;
1132         efi_get_next_variable_t *get_next_variable;
1133         efi_set_variable_t *set_variable;
1134         efi_set_variable_t *set_variable_nonblocking;
1135         efi_query_variable_store_t *query_variable_store;
1136 };
1137
1138 struct efivars {
1139         /*
1140          * ->lock protects two things:
1141          * 1) efivarfs_list and efivars_sysfs_list
1142          * 2) ->ops calls
1143          */
1144         spinlock_t lock;
1145         struct kset *kset;
1146         struct kobject *kobject;
1147         const struct efivar_operations *ops;
1148 };
1149
1150 /*
1151  * The maximum size of VariableName + Data = 1024
1152  * Therefore, it's reasonable to save that much
1153  * space in each part of the structure,
1154  * and we use a page for reading/writing.
1155  */
1156
1157 #define EFI_VAR_NAME_LEN        1024
1158
1159 struct efi_variable {
1160         efi_char16_t  VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1161         efi_guid_t    VendorGuid;
1162         unsigned long DataSize;
1163         __u8          Data[1024];
1164         efi_status_t  Status;
1165         __u32         Attributes;
1166 } __attribute__((packed));
1167
1168 struct efivar_entry {
1169         struct efi_variable var;
1170         struct list_head list;
1171         struct kobject kobj;
1172         bool scanning;
1173         bool deleting;
1174 };
1175
1176 struct efi_simple_text_output_protocol_32 {
1177         u32 reset;
1178         u32 output_string;
1179         u32 test_string;
1180 };
1181
1182 struct efi_simple_text_output_protocol_64 {
1183         u64 reset;
1184         u64 output_string;
1185         u64 test_string;
1186 };
1187
1188 struct efi_simple_text_output_protocol {
1189         void *reset;
1190         efi_status_t (*output_string)(void *, void *);
1191         void *test_string;
1192 };
1193
1194 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR               0
1195 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR               1
1196 #define PIXEL_BIT_MASK                                  2
1197 #define PIXEL_BLT_ONLY                                  3
1198 #define PIXEL_FORMAT_MAX                                4
1199
1200 struct efi_pixel_bitmask {
1201         u32 red_mask;
1202         u32 green_mask;
1203         u32 blue_mask;
1204         u32 reserved_mask;
1205 };
1206
1207 struct efi_graphics_output_mode_info {
1208         u32 version;
1209         u32 horizontal_resolution;
1210         u32 vertical_resolution;
1211         int pixel_format;
1212         struct efi_pixel_bitmask pixel_information;
1213         u32 pixels_per_scan_line;
1214 } __packed;
1215
1216 struct efi_graphics_output_protocol_mode_32 {
1217         u32 max_mode;
1218         u32 mode;
1219         u32 info;
1220         u32 size_of_info;
1221         u64 frame_buffer_base;
1222         u32 frame_buffer_size;
1223 } __packed;
1224
1225 struct efi_graphics_output_protocol_mode_64 {
1226         u32 max_mode;
1227         u32 mode;
1228         u64 info;
1229         u64 size_of_info;
1230         u64 frame_buffer_base;
1231         u64 frame_buffer_size;
1232 } __packed;
1233
1234 struct efi_graphics_output_protocol_mode {
1235         u32 max_mode;
1236         u32 mode;
1237         unsigned long info;
1238         unsigned long size_of_info;
1239         u64 frame_buffer_base;
1240         unsigned long frame_buffer_size;
1241 } __packed;
1242
1243 struct efi_graphics_output_protocol_32 {
1244         u32 query_mode;
1245         u32 set_mode;
1246         u32 blt;
1247         u32 mode;
1248 };
1249
1250 struct efi_graphics_output_protocol_64 {
1251         u64 query_mode;
1252         u64 set_mode;
1253         u64 blt;
1254         u64 mode;
1255 };
1256
1257 struct efi_graphics_output_protocol {
1258         unsigned long query_mode;
1259         unsigned long set_mode;
1260         unsigned long blt;
1261         struct efi_graphics_output_protocol_mode *mode;
1262 };
1263
1264 typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
1265         struct efi_graphics_output_protocol *, u32, unsigned long *,
1266         struct efi_graphics_output_mode_info **);
1267
1268 extern struct list_head efivar_sysfs_list;
1269
1270 static inline void
1271 efivar_unregister(struct efivar_entry *var)
1272 {
1273         kobject_put(&var->kobj);
1274 }
1275
1276 int efivars_register(struct efivars *efivars,
1277                      const struct efivar_operations *ops,
1278                      struct kobject *kobject);
1279 int efivars_unregister(struct efivars *efivars);
1280 struct kobject *efivars_kobject(void);
1281
1282 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1283                 void *data, bool duplicates, struct list_head *head);
1284
1285 void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1286 void efivar_entry_remove(struct efivar_entry *entry);
1287
1288 int __efivar_entry_delete(struct efivar_entry *entry);
1289 int efivar_entry_delete(struct efivar_entry *entry);
1290
1291 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1292 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1293                        unsigned long *size, void *data);
1294 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1295                      unsigned long *size, void *data);
1296 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1297                      unsigned long size, void *data, struct list_head *head);
1298 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1299                               unsigned long *size, void *data, bool *set);
1300 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1301                           bool block, unsigned long size, void *data);
1302
1303 void efivar_entry_iter_begin(void);
1304 void efivar_entry_iter_end(void);
1305
1306 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1307                         struct list_head *head, void *data,
1308                         struct efivar_entry **prev);
1309 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1310                       struct list_head *head, void *data);
1311
1312 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1313                                        struct list_head *head, bool remove);
1314
1315 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1316                      unsigned long data_size);
1317 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1318                                   size_t len);
1319
1320 extern struct work_struct efivar_work;
1321 void efivar_run_worker(void);
1322
1323 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1324 int efivars_sysfs_init(void);
1325
1326 #define EFIVARS_DATA_SIZE_MAX 1024
1327
1328 #endif /* CONFIG_EFI_VARS */
1329 extern bool efi_capsule_pending(int *reset_type);
1330
1331 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1332                                  size_t size, int *reset);
1333
1334 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1335                               struct page **pages);
1336
1337 #ifdef CONFIG_EFI_RUNTIME_MAP
1338 int efi_runtime_map_init(struct kobject *);
1339 void efi_runtime_map_setup(void *, int, u32);
1340 int efi_get_runtime_map_size(void);
1341 int efi_get_runtime_map_desc_size(void);
1342 int efi_runtime_map_copy(void *buf, size_t bufsz);
1343 #else
1344 static inline int efi_runtime_map_init(struct kobject *kobj)
1345 {
1346         return 0;
1347 }
1348
1349 static inline void
1350 efi_runtime_map_setup(void *map, int nr_entries, u32 desc_size) {}
1351
1352 static inline int efi_get_runtime_map_size(void)
1353 {
1354         return 0;
1355 }
1356
1357 static inline int efi_get_runtime_map_desc_size(void)
1358 {
1359         return 0;
1360 }
1361
1362 static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1363 {
1364         return 0;
1365 }
1366
1367 #endif
1368
1369 /* prototypes shared between arch specific and generic stub code */
1370
1371 #define pr_efi(sys_table, msg)     efi_printk(sys_table, "EFI stub: "msg)
1372 #define pr_efi_err(sys_table, msg) efi_printk(sys_table, "EFI stub: ERROR: "msg)
1373
1374 void efi_printk(efi_system_table_t *sys_table_arg, char *str);
1375
1376 void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
1377               unsigned long addr);
1378
1379 char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
1380                           efi_loaded_image_t *image, int *cmd_line_len);
1381
1382 efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
1383                                 struct efi_boot_memmap *map);
1384
1385 efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
1386                            unsigned long size, unsigned long align,
1387                            unsigned long *addr);
1388
1389 efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
1390                             unsigned long size, unsigned long align,
1391                             unsigned long *addr, unsigned long max);
1392
1393 efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
1394                                  unsigned long *image_addr,
1395                                  unsigned long image_size,
1396                                  unsigned long alloc_size,
1397                                  unsigned long preferred_addr,
1398                                  unsigned long alignment);
1399
1400 efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
1401                                   efi_loaded_image_t *image,
1402                                   char *cmd_line, char *option_string,
1403                                   unsigned long max_addr,
1404                                   unsigned long *load_addr,
1405                                   unsigned long *load_size);
1406
1407 efi_status_t efi_parse_options(char *cmdline);
1408
1409 efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
1410                            struct screen_info *si, efi_guid_t *proto,
1411                            unsigned long size);
1412
1413 bool efi_runtime_disabled(void);
1414 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1415
1416 /*
1417  * Arch code can implement the following three template macros, avoiding
1418  * reptition for the void/non-void return cases of {__,}efi_call_virt():
1419  *
1420  *  * arch_efi_call_virt_setup()
1421  *
1422  *    Sets up the environment for the call (e.g. switching page tables,
1423  *    allowing kernel-mode use of floating point, if required).
1424  *
1425  *  * arch_efi_call_virt()
1426  *
1427  *    Performs the call. The last expression in the macro must be the call
1428  *    itself, allowing the logic to be shared by the void and non-void
1429  *    cases.
1430  *
1431  *  * arch_efi_call_virt_teardown()
1432  *
1433  *    Restores the usual kernel environment once the call has returned.
1434  */
1435
1436 #define efi_call_virt_pointer(p, f, args...)                            \
1437 ({                                                                      \
1438         efi_status_t __s;                                               \
1439         unsigned long __flags;                                          \
1440                                                                         \
1441         arch_efi_call_virt_setup();                                     \
1442                                                                         \
1443         local_save_flags(__flags);                                      \
1444         __s = arch_efi_call_virt(p, f, args);                           \
1445         efi_call_virt_check_flags(__flags, __stringify(f));             \
1446                                                                         \
1447         arch_efi_call_virt_teardown();                                  \
1448                                                                         \
1449         __s;                                                            \
1450 })
1451
1452 #define __efi_call_virt_pointer(p, f, args...)                          \
1453 ({                                                                      \
1454         unsigned long __flags;                                          \
1455                                                                         \
1456         arch_efi_call_virt_setup();                                     \
1457                                                                         \
1458         local_save_flags(__flags);                                      \
1459         arch_efi_call_virt(p, f, args);                                 \
1460         efi_call_virt_check_flags(__flags, __stringify(f));             \
1461                                                                         \
1462         arch_efi_call_virt_teardown();                                  \
1463 })
1464
1465 typedef efi_status_t (*efi_exit_boot_map_processing)(
1466         efi_system_table_t *sys_table_arg,
1467         struct efi_boot_memmap *map,
1468         void *priv);
1469
1470 efi_status_t efi_exit_boot_services(efi_system_table_t *sys_table,
1471                                     void *handle,
1472                                     struct efi_boot_memmap *map,
1473                                     void *priv,
1474                                     efi_exit_boot_map_processing priv_func);
1475 #endif /* _LINUX_EFI_H */