linux/include/linux/efi.h
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   1#ifndef _LINUX_EFI_H
   2#define _LINUX_EFI_H
   3
   4/*
   5 * Extensible Firmware Interface
   6 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
   7 *
   8 * Copyright (C) 1999 VA Linux Systems
   9 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
  10 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
  11 *      David Mosberger-Tang <davidm@hpl.hp.com>
  12 *      Stephane Eranian <eranian@hpl.hp.com>
  13 */
  14#include <linux/init.h>
  15#include <linux/string.h>
  16#include <linux/time.h>
  17#include <linux/types.h>
  18#include <linux/proc_fs.h>
  19#include <linux/rtc.h>
  20#include <linux/ioport.h>
  21#include <linux/pfn.h>
  22#include <linux/pstore.h>
  23
  24#include <asm/page.h>
  25
  26#define EFI_SUCCESS             0
  27#define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
  28#define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
  29#define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
  30#define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
  31#define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
  32#define EFI_NOT_READY           ( 6 | (1UL << (BITS_PER_LONG-1)))
  33#define EFI_DEVICE_ERROR        ( 7 | (1UL << (BITS_PER_LONG-1)))
  34#define EFI_WRITE_PROTECTED     ( 8 | (1UL << (BITS_PER_LONG-1)))
  35#define EFI_OUT_OF_RESOURCES    ( 9 | (1UL << (BITS_PER_LONG-1)))
  36#define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  37#define EFI_SECURITY_VIOLATION  (26 | (1UL << (BITS_PER_LONG-1)))
  38
  39typedef unsigned long efi_status_t;
  40typedef u8 efi_bool_t;
  41typedef u16 efi_char16_t;               /* UNICODE character */
  42
  43
  44typedef struct {
  45        u8 b[16];
  46} efi_guid_t;
  47
  48#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  49((efi_guid_t) \
  50{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  51  (b) & 0xff, ((b) >> 8) & 0xff, \
  52  (c) & 0xff, ((c) >> 8) & 0xff, \
  53  (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  54
  55/*
  56 * Generic EFI table header
  57 */
  58typedef struct {
  59        u64 signature;
  60        u32 revision;
  61        u32 headersize;
  62        u32 crc32;
  63        u32 reserved;
  64} efi_table_hdr_t;
  65
  66/*
  67 * Memory map descriptor:
  68 */
  69
  70/* Memory types: */
  71#define EFI_RESERVED_TYPE                0
  72#define EFI_LOADER_CODE                  1
  73#define EFI_LOADER_DATA                  2
  74#define EFI_BOOT_SERVICES_CODE           3
  75#define EFI_BOOT_SERVICES_DATA           4
  76#define EFI_RUNTIME_SERVICES_CODE        5
  77#define EFI_RUNTIME_SERVICES_DATA        6
  78#define EFI_CONVENTIONAL_MEMORY          7
  79#define EFI_UNUSABLE_MEMORY              8
  80#define EFI_ACPI_RECLAIM_MEMORY          9
  81#define EFI_ACPI_MEMORY_NVS             10
  82#define EFI_MEMORY_MAPPED_IO            11
  83#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
  84#define EFI_PAL_CODE                    13
  85#define EFI_MAX_MEMORY_TYPE             14
  86
  87/* Attribute values: */
  88#define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
  89#define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
  90#define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
  91#define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
  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_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
  96#define EFI_MEMORY_DESCRIPTOR_VERSION   1
  97
  98#define EFI_PAGE_SHIFT          12
  99
 100typedef struct {
 101        u32 type;
 102        u32 pad;
 103        u64 phys_addr;
 104        u64 virt_addr;
 105        u64 num_pages;
 106        u64 attribute;
 107} efi_memory_desc_t;
 108
 109typedef struct {
 110        efi_guid_t guid;
 111        u32 headersize;
 112        u32 flags;
 113        u32 imagesize;
 114} efi_capsule_header_t;
 115
 116/*
 117 * Allocation types for calls to boottime->allocate_pages.
 118 */
 119#define EFI_ALLOCATE_ANY_PAGES          0
 120#define EFI_ALLOCATE_MAX_ADDRESS        1
 121#define EFI_ALLOCATE_ADDRESS            2
 122#define EFI_MAX_ALLOCATE_TYPE           3
 123
 124typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
 125
 126/*
 127 * Types and defines for Time Services
 128 */
 129#define EFI_TIME_ADJUST_DAYLIGHT 0x1
 130#define EFI_TIME_IN_DAYLIGHT     0x2
 131#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 132
 133typedef struct {
 134        u16 year;
 135        u8 month;
 136        u8 day;
 137        u8 hour;
 138        u8 minute;
 139        u8 second;
 140        u8 pad1;
 141        u32 nanosecond;
 142        s16 timezone;
 143        u8 daylight;
 144        u8 pad2;
 145} efi_time_t;
 146
 147typedef struct {
 148        u32 resolution;
 149        u32 accuracy;
 150        u8 sets_to_zero;
 151} efi_time_cap_t;
 152
 153/*
 154 * EFI Boot Services table
 155 */
 156typedef struct {
 157        efi_table_hdr_t hdr;
 158        void *raise_tpl;
 159        void *restore_tpl;
 160        void *allocate_pages;
 161        void *free_pages;
 162        void *get_memory_map;
 163        void *allocate_pool;
 164        void *free_pool;
 165        void *create_event;
 166        void *set_timer;
 167        void *wait_for_event;
 168        void *signal_event;
 169        void *close_event;
 170        void *check_event;
 171        void *install_protocol_interface;
 172        void *reinstall_protocol_interface;
 173        void *uninstall_protocol_interface;
 174        void *handle_protocol;
 175        void *__reserved;
 176        void *register_protocol_notify;
 177        void *locate_handle;
 178        void *locate_device_path;
 179        void *install_configuration_table;
 180        void *load_image;
 181        void *start_image;
 182        void *exit;
 183        void *unload_image;
 184        void *exit_boot_services;
 185        void *get_next_monotonic_count;
 186        void *stall;
 187        void *set_watchdog_timer;
 188        void *connect_controller;
 189        void *disconnect_controller;
 190        void *open_protocol;
 191        void *close_protocol;
 192        void *open_protocol_information;
 193        void *protocols_per_handle;
 194        void *locate_handle_buffer;
 195        void *locate_protocol;
 196        void *install_multiple_protocol_interfaces;
 197        void *uninstall_multiple_protocol_interfaces;
 198        void *calculate_crc32;
 199        void *copy_mem;
 200        void *set_mem;
 201        void *create_event_ex;
 202} efi_boot_services_t;
 203
 204typedef enum {
 205        EfiPciIoWidthUint8,
 206        EfiPciIoWidthUint16,
 207        EfiPciIoWidthUint32,
 208        EfiPciIoWidthUint64,
 209        EfiPciIoWidthFifoUint8,
 210        EfiPciIoWidthFifoUint16,
 211        EfiPciIoWidthFifoUint32,
 212        EfiPciIoWidthFifoUint64,
 213        EfiPciIoWidthFillUint8,
 214        EfiPciIoWidthFillUint16,
 215        EfiPciIoWidthFillUint32,
 216        EfiPciIoWidthFillUint64,
 217        EfiPciIoWidthMaximum
 218} EFI_PCI_IO_PROTOCOL_WIDTH;
 219
 220typedef enum {
 221        EfiPciIoAttributeOperationGet,
 222        EfiPciIoAttributeOperationSet,
 223        EfiPciIoAttributeOperationEnable,
 224        EfiPciIoAttributeOperationDisable,
 225        EfiPciIoAttributeOperationSupported,
 226    EfiPciIoAttributeOperationMaximum
 227} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
 228
 229
 230typedef struct {
 231        void *read;
 232        void *write;
 233} efi_pci_io_protocol_access_t;
 234
 235typedef struct {
 236        void *poll_mem;
 237        void *poll_io;
 238        efi_pci_io_protocol_access_t mem;
 239        efi_pci_io_protocol_access_t io;
 240        efi_pci_io_protocol_access_t pci;
 241        void *copy_mem;
 242        void *map;
 243        void *unmap;
 244        void *allocate_buffer;
 245        void *free_buffer;
 246        void *flush;
 247        void *get_location;
 248        void *attributes;
 249        void *get_bar_attributes;
 250        void *set_bar_attributes;
 251        uint64_t romsize;
 252        void *romimage;
 253} efi_pci_io_protocol;
 254
 255#define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
 256#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
 257#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
 258#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
 259#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
 260#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
 261#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
 262#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
 263#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
 264#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
 265#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
 266#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
 267#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
 268#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
 269#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
 270#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
 271#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
 272#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
 273#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
 274
 275/*
 276 * Types and defines for EFI ResetSystem
 277 */
 278#define EFI_RESET_COLD 0
 279#define EFI_RESET_WARM 1
 280#define EFI_RESET_SHUTDOWN 2
 281
 282/*
 283 * EFI Runtime Services table
 284 */
 285#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 286#define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 287
 288typedef struct {
 289        efi_table_hdr_t hdr;
 290        unsigned long get_time;
 291        unsigned long set_time;
 292        unsigned long get_wakeup_time;
 293        unsigned long set_wakeup_time;
 294        unsigned long set_virtual_address_map;
 295        unsigned long convert_pointer;
 296        unsigned long get_variable;
 297        unsigned long get_next_variable;
 298        unsigned long set_variable;
 299        unsigned long get_next_high_mono_count;
 300        unsigned long reset_system;
 301        unsigned long update_capsule;
 302        unsigned long query_capsule_caps;
 303        unsigned long query_variable_info;
 304} efi_runtime_services_t;
 305
 306typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 307typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 308typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 309                                            efi_time_t *tm);
 310typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 311typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 312                                         unsigned long *data_size, void *data);
 313typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 314                                              efi_guid_t *vendor);
 315typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 
 316                                         u32 attr, unsigned long data_size,
 317                                         void *data);
 318typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 319typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 320                                 unsigned long data_size, efi_char16_t *data);
 321typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 322                                                unsigned long descriptor_size,
 323                                                u32 descriptor_version,
 324                                                efi_memory_desc_t *virtual_map);
 325typedef efi_status_t efi_query_variable_info_t(u32 attr,
 326                                               u64 *storage_space,
 327                                               u64 *remaining_space,
 328                                               u64 *max_variable_size);
 329typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 330                                          unsigned long count,
 331                                          unsigned long sg_list);
 332typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 333                                              unsigned long count,
 334                                              u64 *max_size,
 335                                              int *reset_type);
 336
 337/*
 338 *  EFI Configuration Table and GUID definitions
 339 */
 340#define NULL_GUID \
 341    EFI_GUID(  0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
 342
 343#define MPS_TABLE_GUID    \
 344    EFI_GUID(  0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 345
 346#define ACPI_TABLE_GUID    \
 347    EFI_GUID(  0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 348
 349#define ACPI_20_TABLE_GUID    \
 350    EFI_GUID(  0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
 351
 352#define SMBIOS_TABLE_GUID    \
 353    EFI_GUID(  0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 354
 355#define SAL_SYSTEM_TABLE_GUID    \
 356    EFI_GUID(  0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 357
 358#define HCDP_TABLE_GUID \
 359    EFI_GUID(  0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
 360
 361#define UGA_IO_PROTOCOL_GUID \
 362    EFI_GUID(  0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
 363
 364#define EFI_GLOBAL_VARIABLE_GUID \
 365    EFI_GUID(  0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
 366
 367#define UV_SYSTEM_TABLE_GUID \
 368    EFI_GUID(  0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
 369
 370#define LINUX_EFI_CRASH_GUID \
 371    EFI_GUID(  0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
 372
 373#define LOADED_IMAGE_PROTOCOL_GUID \
 374    EFI_GUID(  0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 375
 376#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
 377    EFI_GUID(  0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
 378
 379#define EFI_UGA_PROTOCOL_GUID \
 380    EFI_GUID(  0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
 381
 382#define EFI_PCI_IO_PROTOCOL_GUID \
 383    EFI_GUID(  0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
 384
 385#define EFI_FILE_INFO_ID \
 386    EFI_GUID(  0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 387
 388#define EFI_FILE_SYSTEM_GUID \
 389    EFI_GUID(  0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 390
 391typedef struct {
 392        efi_guid_t guid;
 393        u64 table;
 394} efi_config_table_64_t;
 395
 396typedef struct {
 397        efi_guid_t guid;
 398        u32 table;
 399} efi_config_table_32_t;
 400
 401typedef struct {
 402        efi_guid_t guid;
 403        unsigned long table;
 404} efi_config_table_t;
 405
 406#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 407
 408#define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 409#define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 410#define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 411#define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 412#define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 413#define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 414
 415typedef struct {
 416        efi_table_hdr_t hdr;
 417        u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 418        u32 fw_revision;
 419        u32 __pad1;
 420        u64 con_in_handle;
 421        u64 con_in;
 422        u64 con_out_handle;
 423        u64 con_out;
 424        u64 stderr_handle;
 425        u64 stderr;
 426        u64 runtime;
 427        u64 boottime;
 428        u32 nr_tables;
 429        u32 __pad2;
 430        u64 tables;
 431} efi_system_table_64_t;
 432
 433typedef struct {
 434        efi_table_hdr_t hdr;
 435        u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 436        u32 fw_revision;
 437        u32 con_in_handle;
 438        u32 con_in;
 439        u32 con_out_handle;
 440        u32 con_out;
 441        u32 stderr_handle;
 442        u32 stderr;
 443        u32 runtime;
 444        u32 boottime;
 445        u32 nr_tables;
 446        u32 tables;
 447} efi_system_table_32_t;
 448
 449typedef struct {
 450        efi_table_hdr_t hdr;
 451        unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 452        u32 fw_revision;
 453        unsigned long con_in_handle;
 454        unsigned long con_in;
 455        unsigned long con_out_handle;
 456        unsigned long con_out;
 457        unsigned long stderr_handle;
 458        unsigned long stderr;
 459        efi_runtime_services_t *runtime;
 460        efi_boot_services_t *boottime;
 461        unsigned long nr_tables;
 462        unsigned long tables;
 463} efi_system_table_t;
 464
 465struct efi_memory_map {
 466        void *phys_map;
 467        void *map;
 468        void *map_end;
 469        int nr_map;
 470        unsigned long desc_version;
 471        unsigned long desc_size;
 472};
 473
 474typedef struct {
 475        u32 revision;
 476        void *parent_handle;
 477        efi_system_table_t *system_table;
 478        void *device_handle;
 479        void *file_path;
 480        void *reserved;
 481        u32 load_options_size;
 482        void *load_options;
 483        void *image_base;
 484        __aligned_u64 image_size;
 485        unsigned int image_code_type;
 486        unsigned int image_data_type;
 487        unsigned long unload;
 488} efi_loaded_image_t;
 489
 490typedef struct {
 491        u64 revision;
 492        void *open_volume;
 493} efi_file_io_interface_t;
 494
 495typedef struct {
 496        u64 size;
 497        u64 file_size;
 498        u64 phys_size;
 499        efi_time_t create_time;
 500        efi_time_t last_access_time;
 501        efi_time_t modification_time;
 502        __aligned_u64 attribute;
 503        efi_char16_t filename[1];
 504} efi_file_info_t;
 505
 506typedef struct {
 507        u64 revision;
 508        void *open;
 509        void *close;
 510        void *delete;
 511        void *read;
 512        void *write;
 513        void *get_position;
 514        void *set_position;
 515        void *get_info;
 516        void *set_info;
 517        void *flush;
 518} efi_file_handle_t;
 519
 520#define EFI_FILE_MODE_READ      0x0000000000000001
 521#define EFI_FILE_MODE_WRITE     0x0000000000000002
 522#define EFI_FILE_MODE_CREATE    0x8000000000000000
 523
 524#define EFI_INVALID_TABLE_ADDR          (~0UL)
 525
 526/*
 527 * All runtime access to EFI goes through this structure:
 528 */
 529extern struct efi {
 530        efi_system_table_t *systab;     /* EFI system table */
 531        unsigned int runtime_version;   /* Runtime services version */
 532        unsigned long mps;              /* MPS table */
 533        unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
 534        unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
 535        unsigned long smbios;           /* SM BIOS table */
 536        unsigned long sal_systab;       /* SAL system table */
 537        unsigned long boot_info;        /* boot info table */
 538        unsigned long hcdp;             /* HCDP table */
 539        unsigned long uga;              /* UGA table */
 540        unsigned long uv_systab;        /* UV system table */
 541        efi_get_time_t *get_time;
 542        efi_set_time_t *set_time;
 543        efi_get_wakeup_time_t *get_wakeup_time;
 544        efi_set_wakeup_time_t *set_wakeup_time;
 545        efi_get_variable_t *get_variable;
 546        efi_get_next_variable_t *get_next_variable;
 547        efi_set_variable_t *set_variable;
 548        efi_query_variable_info_t *query_variable_info;
 549        efi_update_capsule_t *update_capsule;
 550        efi_query_capsule_caps_t *query_capsule_caps;
 551        efi_get_next_high_mono_count_t *get_next_high_mono_count;
 552        efi_reset_system_t *reset_system;
 553        efi_set_virtual_address_map_t *set_virtual_address_map;
 554} efi;
 555
 556static inline int
 557efi_guidcmp (efi_guid_t left, efi_guid_t right)
 558{
 559        return memcmp(&left, &right, sizeof (efi_guid_t));
 560}
 561
 562static inline char *
 563efi_guid_unparse(efi_guid_t *guid, char *out)
 564{
 565        sprintf(out, "%pUl", guid->b);
 566        return out;
 567}
 568
 569extern void efi_init (void);
 570extern void *efi_get_pal_addr (void);
 571extern void efi_map_pal_code (void);
 572extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 573extern void efi_gettimeofday (struct timespec *ts);
 574extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 575#ifdef CONFIG_X86
 576extern void efi_late_init(void);
 577extern void efi_free_boot_services(void);
 578#else
 579static inline void efi_late_init(void) {}
 580static inline void efi_free_boot_services(void) {}
 581#endif
 582extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 583extern u64 efi_get_iobase (void);
 584extern u32 efi_mem_type (unsigned long phys_addr);
 585extern u64 efi_mem_attributes (unsigned long phys_addr);
 586extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 587extern int __init efi_uart_console_only (void);
 588extern void efi_initialize_iomem_resources(struct resource *code_resource,
 589                struct resource *data_resource, struct resource *bss_resource);
 590extern unsigned long efi_get_time(void);
 591extern int efi_set_rtc_mmss(unsigned long nowtime);
 592extern void efi_reserve_boot_services(void);
 593extern struct efi_memory_map memmap;
 594
 595/**
 596 * efi_range_is_wc - check the WC bit on an address range
 597 * @start: starting kvirt address
 598 * @len: length of range
 599 *
 600 * Consult the EFI memory map and make sure it's ok to set this range WC.
 601 * Returns true or false.
 602 */
 603static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 604{
 605        unsigned long i;
 606
 607        for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 608                unsigned long paddr = __pa(start + i);
 609                if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 610                        return 0;
 611        }
 612        /* The range checked out */
 613        return 1;
 614}
 615
 616#ifdef CONFIG_EFI_PCDP
 617extern int __init efi_setup_pcdp_console(char *);
 618#endif
 619
 620/*
 621 * We play games with efi_enabled so that the compiler will, if
 622 * possible, remove EFI-related code altogether.
 623 */
 624#define EFI_BOOT                0       /* Were we booted from EFI? */
 625#define EFI_SYSTEM_TABLES       1       /* Can we use EFI system tables? */
 626#define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
 627#define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
 628#define EFI_MEMMAP              4       /* Can we use EFI memory map? */
 629#define EFI_64BIT               5       /* Is the firmware 64-bit? */
 630
 631#ifdef CONFIG_EFI
 632# ifdef CONFIG_X86
 633extern int efi_enabled(int facility);
 634# else
 635static inline int efi_enabled(int facility)
 636{
 637        return 1;
 638}
 639# endif
 640#else
 641static inline int efi_enabled(int facility)
 642{
 643        return 0;
 644}
 645#endif
 646
 647/*
 648 * Variable Attributes
 649 */
 650#define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 651#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 652#define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 653#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
 654#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
 655#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
 656#define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
 657
 658#define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
 659                                EFI_VARIABLE_BOOTSERVICE_ACCESS | \
 660                                EFI_VARIABLE_RUNTIME_ACCESS | \
 661                                EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
 662                                EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
 663                                EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
 664                                EFI_VARIABLE_APPEND_WRITE)
 665/*
 666 * The type of search to perform when calling boottime->locate_handle
 667 */
 668#define EFI_LOCATE_ALL_HANDLES                  0
 669#define EFI_LOCATE_BY_REGISTER_NOTIFY           1
 670#define EFI_LOCATE_BY_PROTOCOL                  2
 671
 672/*
 673 * EFI Device Path information
 674 */
 675#define EFI_DEV_HW                      0x01
 676#define  EFI_DEV_PCI                             1
 677#define  EFI_DEV_PCCARD                          2
 678#define  EFI_DEV_MEM_MAPPED                      3
 679#define  EFI_DEV_VENDOR                          4
 680#define  EFI_DEV_CONTROLLER                      5
 681#define EFI_DEV_ACPI                    0x02
 682#define   EFI_DEV_BASIC_ACPI                     1
 683#define   EFI_DEV_EXPANDED_ACPI                  2
 684#define EFI_DEV_MSG                     0x03
 685#define   EFI_DEV_MSG_ATAPI                      1
 686#define   EFI_DEV_MSG_SCSI                       2
 687#define   EFI_DEV_MSG_FC                         3
 688#define   EFI_DEV_MSG_1394                       4
 689#define   EFI_DEV_MSG_USB                        5
 690#define   EFI_DEV_MSG_USB_CLASS                 15
 691#define   EFI_DEV_MSG_I20                        6
 692#define   EFI_DEV_MSG_MAC                       11
 693#define   EFI_DEV_MSG_IPV4                      12
 694#define   EFI_DEV_MSG_IPV6                      13
 695#define   EFI_DEV_MSG_INFINIBAND                 9
 696#define   EFI_DEV_MSG_UART                      14
 697#define   EFI_DEV_MSG_VENDOR                    10
 698#define EFI_DEV_MEDIA                   0x04
 699#define   EFI_DEV_MEDIA_HARD_DRIVE               1
 700#define   EFI_DEV_MEDIA_CDROM                    2
 701#define   EFI_DEV_MEDIA_VENDOR                   3
 702#define   EFI_DEV_MEDIA_FILE                     4
 703#define   EFI_DEV_MEDIA_PROTOCOL                 5
 704#define EFI_DEV_BIOS_BOOT               0x05
 705#define EFI_DEV_END_PATH                0x7F
 706#define EFI_DEV_END_PATH2               0xFF
 707#define   EFI_DEV_END_INSTANCE                  0x01
 708#define   EFI_DEV_END_ENTIRE                    0xFF
 709
 710struct efi_generic_dev_path {
 711        u8 type;
 712        u8 sub_type;
 713        u16 length;
 714} __attribute ((packed));
 715
 716static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
 717{
 718        *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
 719        *addr &= PAGE_MASK;
 720}
 721
 722#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
 723/*
 724 * EFI Variable support.
 725 *
 726 * Different firmware drivers can expose their EFI-like variables using
 727 * the following.
 728 */
 729
 730struct efivar_operations {
 731        efi_get_variable_t *get_variable;
 732        efi_get_next_variable_t *get_next_variable;
 733        efi_set_variable_t *set_variable;
 734        efi_query_variable_info_t *query_variable_info;
 735};
 736
 737struct efivars {
 738        /*
 739         * ->lock protects two things:
 740         * 1) ->list - adds, removals, reads, writes
 741         * 2) ops.[gs]et_variable() calls.
 742         * It must not be held when creating sysfs entries or calling kmalloc.
 743         * ops.get_next_variable() is only called from register_efivars(),
 744         * which is protected by the BKL, so that path is safe.
 745         */
 746        spinlock_t lock;
 747        struct list_head list;
 748        struct kset *kset;
 749        struct kobject *kobject;
 750        struct bin_attribute *new_var, *del_var;
 751        const struct efivar_operations *ops;
 752        struct efivar_entry *walk_entry;
 753        struct pstore_info efi_pstore_info;
 754};
 755
 756int register_efivars(struct efivars *efivars,
 757                     const struct efivar_operations *ops,
 758                     struct kobject *parent_kobj);
 759void unregister_efivars(struct efivars *efivars);
 760
 761#endif /* CONFIG_EFI_VARS */
 762
 763#endif /* _LINUX_EFI_H */
 764
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