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