include/linux/efi.h

   1 #ifndef _LINUX_EFI_H
   2 #define _LINUX_EFI_H
   3
   4 /*
   5  * Extensible Firmware Interface
   6  * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
   7  *
   8  * Copyright (C) 1999 VA Linux Systems
   9  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
  10  * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
  11  *      David Mosberger-Tang <davidm@hpl.hp.com>
  12  *      Stephane Eranian <eranian@hpl.hp.com>
  13  */
  14 #include <linux/init.h>
  15 #include <linux/string.h>
  16 #include <linux/time.h>
  17 #include <linux/types.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/rtc.h>
  20 #include <linux/ioport.h>
  21 #include <linux/pfn.h>
  22 #include <linux/pstore.h>
  23
  24 #include <asm/page.h>
  25
  26 #define EFI_SUCCESS             0
  27 #define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
  28 #define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
  29 #define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
  30 #define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
  31 #define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
  32 #define EFI_NOT_READY           ( 6 | (1UL << (BITS_PER_LONG-1)))
  33 #define EFI_DEVICE_ERROR        ( 7 | (1UL << (BITS_PER_LONG-1)))
  34 #define EFI_WRITE_PROTECTED     ( 8 | (1UL << (BITS_PER_LONG-1)))
  35 #define EFI_OUT_OF_RESOURCES    ( 9 | (1UL << (BITS_PER_LONG-1)))
  36 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  37 #define EFI_SECURITY_VIOLATION  (26 | (1UL << (BITS_PER_LONG-1)))
  38
  39 typedef unsigned long efi_status_t;
  40 typedef u8 efi_bool_t;
  41 typedef u16 efi_char16_t;               /* UNICODE character */
  42
  43
  44 typedef 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  */
  58 typedef 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
 100 typedef 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
 109 typedef 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
 124 typedef 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
 133 typedef 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
 147 typedef 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  */
 156 typedef 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
 204 typedef 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
 220 typedef enum {
 221         EfiPciIoAttributeOperationGet,
 222         EfiPciIoAttributeOperationSet,
 223         EfiPciIoAttributeOperationEnable,
 224         EfiPciIoAttributeOperationDisable,
 225         EfiPciIoAttributeOperationSupported,
 226     EfiPciIoAttributeOperationMaximum
 227 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
 228
 229
 230 typedef struct {
 231         void *read;
 232         void *write;
 233 } efi_pci_io_protocol_access_t;
 234
 235 typedef 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
 288 typedef struct {
 289         efi_table_hdr_t hdr;
 290         void *get_time;
 291         void *set_time;
 292         void *get_wakeup_time;
 293         void *set_wakeup_time;
 294         void *set_virtual_address_map;
 295         void *convert_pointer;
 296         void *get_variable;
 297         void *get_next_variable;
 298         void *set_variable;
 299         void *get_next_high_mono_count;
 300         void *reset_system;
 301         void *update_capsule;
 302         void *query_capsule_caps;
 303         void *query_variable_info;
 304 } efi_runtime_services_t;
 305
 306 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 307 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 308 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 309                                             efi_time_t *tm);
 310 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 311 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 312                                          unsigned long *data_size, void *data);
 313 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 314                                               efi_guid_t *vendor);
 315 typedef 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);
 318 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 319 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 320                                  unsigned long data_size, efi_char16_t *data);
 321 typedef 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);
 325 typedef efi_status_t efi_query_variable_info_t(u32 attr,
 326                                                u64 *storage_space,
 327                                                u64 *remaining_space,
 328                                                u64 *max_variable_size);
 329 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 330                                           unsigned long count,
 331                                           unsigned long sg_list);
 332 typedef 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 typedef efi_status_t efi_query_variable_store_t(u32 attributes, unsigned long size);
 337
 338 /*
 339  *  EFI Configuration Table and GUID definitions
 340  */
 341 #define NULL_GUID \
 342     EFI_GUID(  0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
 343
 344 #define MPS_TABLE_GUID    \
 345     EFI_GUID(  0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 346
 347 #define ACPI_TABLE_GUID    \
 348     EFI_GUID(  0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 349
 350 #define ACPI_20_TABLE_GUID    \
 351     EFI_GUID(  0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
 352
 353 #define SMBIOS_TABLE_GUID    \
 354     EFI_GUID(  0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 355
 356 #define SAL_SYSTEM_TABLE_GUID    \
 357     EFI_GUID(  0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 358
 359 #define HCDP_TABLE_GUID \
 360     EFI_GUID(  0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
 361
 362 #define UGA_IO_PROTOCOL_GUID \
 363     EFI_GUID(  0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
 364
 365 #define EFI_GLOBAL_VARIABLE_GUID \
 366     EFI_GUID(  0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
 367
 368 #define UV_SYSTEM_TABLE_GUID \
 369     EFI_GUID(  0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
 370
 371 #define LINUX_EFI_CRASH_GUID \
 372     EFI_GUID(  0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
 373
 374 #define LOADED_IMAGE_PROTOCOL_GUID \
 375     EFI_GUID(  0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 376
 377 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
 378     EFI_GUID(  0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
 379
 380 #define EFI_UGA_PROTOCOL_GUID \
 381     EFI_GUID(  0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
 382
 383 #define EFI_PCI_IO_PROTOCOL_GUID \
 384     EFI_GUID(  0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
 385
 386 #define EFI_FILE_INFO_ID \
 387     EFI_GUID(  0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 388
 389 #define EFI_FILE_SYSTEM_GUID \
 390     EFI_GUID(  0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 391
 392 typedef struct {
 393         efi_guid_t guid;
 394         u64 table;
 395 } efi_config_table_64_t;
 396
 397 typedef struct {
 398         efi_guid_t guid;
 399         u32 table;
 400 } efi_config_table_32_t;
 401
 402 typedef struct {
 403         efi_guid_t guid;
 404         unsigned long table;
 405 } efi_config_table_t;
 406
 407 typedef struct {
 408         efi_guid_t guid;
 409         const char *name;
 410         unsigned long *ptr;
 411 } efi_config_table_type_t;
 412
 413 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 414
 415 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 416 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 417 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 418 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 419 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 420 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 421
 422 typedef struct {
 423         efi_table_hdr_t hdr;
 424         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 425         u32 fw_revision;
 426         u32 __pad1;
 427         u64 con_in_handle;
 428         u64 con_in;
 429         u64 con_out_handle;
 430         u64 con_out;
 431         u64 stderr_handle;
 432         u64 stderr;
 433         u64 runtime;
 434         u64 boottime;
 435         u32 nr_tables;
 436         u32 __pad2;
 437         u64 tables;
 438 } efi_system_table_64_t;
 439
 440 typedef struct {
 441         efi_table_hdr_t hdr;
 442         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 443         u32 fw_revision;
 444         u32 con_in_handle;
 445         u32 con_in;
 446         u32 con_out_handle;
 447         u32 con_out;
 448         u32 stderr_handle;
 449         u32 stderr;
 450         u32 runtime;
 451         u32 boottime;
 452         u32 nr_tables;
 453         u32 tables;
 454 } efi_system_table_32_t;
 455
 456 typedef struct {
 457         efi_table_hdr_t hdr;
 458         unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 459         u32 fw_revision;
 460         unsigned long con_in_handle;
 461         unsigned long con_in;
 462         unsigned long con_out_handle;
 463         unsigned long con_out;
 464         unsigned long stderr_handle;
 465         unsigned long stderr;
 466         efi_runtime_services_t *runtime;
 467         efi_boot_services_t *boottime;
 468         unsigned long nr_tables;
 469         unsigned long tables;
 470 } efi_system_table_t;
 471
 472 struct efi_memory_map {
 473         void *phys_map;
 474         void *map;
 475         void *map_end;
 476         int nr_map;
 477         unsigned long desc_version;
 478         unsigned long desc_size;
 479 };
 480
 481 typedef struct {
 482         u32 revision;
 483         void *parent_handle;
 484         efi_system_table_t *system_table;
 485         void *device_handle;
 486         void *file_path;
 487         void *reserved;
 488         u32 load_options_size;
 489         void *load_options;
 490         void *image_base;
 491         __aligned_u64 image_size;
 492         unsigned int image_code_type;
 493         unsigned int image_data_type;
 494         unsigned long unload;
 495 } efi_loaded_image_t;
 496
 497 typedef struct {
 498         u64 revision;
 499         void *open_volume;
 500 } efi_file_io_interface_t;
 501
 502 typedef struct {
 503         u64 size;
 504         u64 file_size;
 505         u64 phys_size;
 506         efi_time_t create_time;
 507         efi_time_t last_access_time;
 508         efi_time_t modification_time;
 509         __aligned_u64 attribute;
 510         efi_char16_t filename[1];
 511 } efi_file_info_t;
 512
 513 typedef struct {
 514         u64 revision;
 515         void *open;
 516         void *close;
 517         void *delete;
 518         void *read;
 519         void *write;
 520         void *get_position;
 521         void *set_position;
 522         void *get_info;
 523         void *set_info;
 524         void *flush;
 525 } efi_file_handle_t;
 526
 527 #define EFI_FILE_MODE_READ      0x0000000000000001
 528 #define EFI_FILE_MODE_WRITE     0x0000000000000002
 529 #define EFI_FILE_MODE_CREATE    0x8000000000000000
 530
 531 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 532
 533 /*
 534  * All runtime access to EFI goes through this structure:
 535  */
 536 extern struct efi {
 537         efi_system_table_t *systab;     /* EFI system table */
 538         unsigned int runtime_version;   /* Runtime services version */
 539         unsigned long mps;              /* MPS table */
 540         unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
 541         unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
 542         unsigned long smbios;           /* SM BIOS table */
 543         unsigned long sal_systab;       /* SAL system table */
 544         unsigned long boot_info;        /* boot info table */
 545         unsigned long hcdp;             /* HCDP table */
 546         unsigned long uga;              /* UGA table */
 547         unsigned long uv_systab;        /* UV system table */
 548         efi_get_time_t *get_time;
 549         efi_set_time_t *set_time;
 550         efi_get_wakeup_time_t *get_wakeup_time;
 551         efi_set_wakeup_time_t *set_wakeup_time;
 552         efi_get_variable_t *get_variable;
 553         efi_get_next_variable_t *get_next_variable;
 554         efi_set_variable_t *set_variable;
 555         efi_query_variable_info_t *query_variable_info;
 556         efi_update_capsule_t *update_capsule;
 557         efi_query_capsule_caps_t *query_capsule_caps;
 558         efi_get_next_high_mono_count_t *get_next_high_mono_count;
 559         efi_reset_system_t *reset_system;
 560         efi_set_virtual_address_map_t *set_virtual_address_map;
 561 } efi;
 562
 563 static inline int
 564 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 565 {
 566         return memcmp(&left, &right, sizeof (efi_guid_t));
 567 }
 568
 569 static inline char *
 570 efi_guid_unparse(efi_guid_t *guid, char *out)
 571 {
 572         sprintf(out, "%pUl", guid->b);
 573         return out;
 574 }
 575
 576 extern void efi_init (void);
 577 extern void *efi_get_pal_addr (void);
 578 extern void efi_map_pal_code (void);
 579 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 580 extern void efi_gettimeofday (struct timespec *ts);
 581 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 582 #ifdef CONFIG_X86
 583 extern void efi_late_init(void);
 584 extern void efi_free_boot_services(void);
 585 extern efi_status_t efi_query_variable_store(u32 attributes, unsigned long size);
 586 #else
 587 static inline void efi_late_init(void) {}
 588 static inline void efi_free_boot_services(void) {}
 589
 590 static inline efi_status_t efi_query_variable_store(u32 attributes, unsigned long size)
 591 {
 592         return EFI_SUCCESS;
 593 }
 594 #endif
 595 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 596 extern int efi_config_init(efi_config_table_type_t *arch_tables);
 597 extern u64 efi_get_iobase (void);
 598 extern u32 efi_mem_type (unsigned long phys_addr);
 599 extern u64 efi_mem_attributes (unsigned long phys_addr);
 600 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 601 extern int __init efi_uart_console_only (void);
 602 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 603                 struct resource *data_resource, struct resource *bss_resource);
 604 extern void efi_get_time(struct timespec *now);
 605 extern int efi_set_rtc_mmss(const struct timespec *now);
 606 extern void efi_reserve_boot_services(void);
 607 extern struct efi_memory_map memmap;
 608
 609 /**
 610  * efi_range_is_wc - check the WC bit on an address range
 611  * @start: starting kvirt address
 612  * @len: length of range
 613  *
 614  * Consult the EFI memory map and make sure it's ok to set this range WC.
 615  * Returns true or false.
 616  */
 617 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 618 {
 619         unsigned long i;
 620
 621         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 622                 unsigned long paddr = __pa(start + i);
 623                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 624                         return 0;
 625         }
 626         /* The range checked out */
 627         return 1;
 628 }
 629
 630 #ifdef CONFIG_EFI_PCDP
 631 extern int __init efi_setup_pcdp_console(char *);
 632 #endif
 633
 634 /*
 635  * We play games with efi_enabled so that the compiler will, if
 636  * possible, remove EFI-related code altogether.
 637  */
 638 #define EFI_BOOT                0       /* Were we booted from EFI? */
 639 #define EFI_SYSTEM_TABLES       1       /* Can we use EFI system tables? */
 640 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
 641 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
 642 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
 643 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
 644
 645 #ifdef CONFIG_EFI
 646 # ifdef CONFIG_X86
 647 extern int efi_enabled(int facility);
 648 # else
 649 static inline int efi_enabled(int facility)
 650 {
 651         return 1;
 652 }
 653 # endif
 654 #else
 655 static inline int efi_enabled(int facility)
 656 {
 657         return 0;
 658 }
 659 #endif
 660
 661 /*
 662  * Variable Attributes
 663  */
 664 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 665 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 666 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 667 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
 668 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
 669 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
 670 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
 671
 672 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
 673                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
 674                                 EFI_VARIABLE_RUNTIME_ACCESS | \
 675                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
 676                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
 677                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
 678                                 EFI_VARIABLE_APPEND_WRITE)
 679 /*
 680  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
 681  * not including trailing NUL
 682  */
 683 #define EFI_VARIABLE_GUID_LEN 36
 684
 685 /*
 686  * The type of search to perform when calling boottime->locate_handle
 687  */
 688 #define EFI_LOCATE_ALL_HANDLES                  0
 689 #define EFI_LOCATE_BY_REGISTER_NOTIFY           1
 690 #define EFI_LOCATE_BY_PROTOCOL                  2
 691
 692 /*
 693  * EFI Device Path information
 694  */
 695 #define EFI_DEV_HW                      0x01
 696 #define  EFI_DEV_PCI                             1
 697 #define  EFI_DEV_PCCARD                          2
 698 #define  EFI_DEV_MEM_MAPPED                      3
 699 #define  EFI_DEV_VENDOR                          4
 700 #define  EFI_DEV_CONTROLLER                      5
 701 #define EFI_DEV_ACPI                    0x02
 702 #define   EFI_DEV_BASIC_ACPI                     1
 703 #define   EFI_DEV_EXPANDED_ACPI                  2
 704 #define EFI_DEV_MSG                     0x03
 705 #define   EFI_DEV_MSG_ATAPI                      1
 706 #define   EFI_DEV_MSG_SCSI                       2
 707 #define   EFI_DEV_MSG_FC                         3
 708 #define   EFI_DEV_MSG_1394                       4
 709 #define   EFI_DEV_MSG_USB                        5
 710 #define   EFI_DEV_MSG_USB_CLASS                 15
 711 #define   EFI_DEV_MSG_I20                        6
 712 #define   EFI_DEV_MSG_MAC                       11
 713 #define   EFI_DEV_MSG_IPV4                      12
 714 #define   EFI_DEV_MSG_IPV6                      13
 715 #define   EFI_DEV_MSG_INFINIBAND                 9
 716 #define   EFI_DEV_MSG_UART                      14
 717 #define   EFI_DEV_MSG_VENDOR                    10
 718 #define EFI_DEV_MEDIA                   0x04
 719 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
 720 #define   EFI_DEV_MEDIA_CDROM                    2
 721 #define   EFI_DEV_MEDIA_VENDOR                   3
 722 #define   EFI_DEV_MEDIA_FILE                     4
 723 #define   EFI_DEV_MEDIA_PROTOCOL                 5
 724 #define EFI_DEV_BIOS_BOOT               0x05
 725 #define EFI_DEV_END_PATH                0x7F
 726 #define EFI_DEV_END_PATH2               0xFF
 727 #define   EFI_DEV_END_INSTANCE                  0x01
 728 #define   EFI_DEV_END_ENTIRE                    0xFF
 729
 730 struct efi_generic_dev_path {
 731         u8 type;
 732         u8 sub_type;
 733         u16 length;
 734 } __attribute ((packed));
 735
 736 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
 737 {
 738         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
 739         *addr &= PAGE_MASK;
 740 }
 741
 742 /*
 743  * EFI Variable support.
 744  *
 745  * Different firmware drivers can expose their EFI-like variables using
 746  * the following.
 747  */
 748
 749 struct efivar_operations {
 750         efi_get_variable_t *get_variable;
 751         efi_get_next_variable_t *get_next_variable;
 752         efi_set_variable_t *set_variable;
 753         efi_query_variable_store_t *query_variable_store;
 754 };
 755
 756 struct efivars {
 757         /*
 758          * ->lock protects two things:
 759          * 1) ->list - adds, removals, reads, writes
 760          * 2) ops.[gs]et_variable() calls.
 761          * It must not be held when creating sysfs entries or calling kmalloc.
 762          * ops.get_next_variable() is only called from register_efivars()
 763          * or efivar_update_sysfs_entries(),
 764          * which is protected by the BKL, so that path is safe.
 765          */
 766         spinlock_t lock;
 767         struct kset *kset;
 768         struct kobject *kobject;
 769         const struct efivar_operations *ops;
 770 };
 771
 772 /*
 773  * The maximum size of VariableName + Data = 1024
 774  * Therefore, it's reasonable to save that much
 775  * space in each part of the structure,
 776  * and we use a page for reading/writing.
 777  */
 778
 779 struct efi_variable {
 780         efi_char16_t  VariableName[1024/sizeof(efi_char16_t)];
 781         efi_guid_t    VendorGuid;
 782         unsigned long DataSize;
 783         __u8          Data[1024];
 784         efi_status_t  Status;
 785         __u32         Attributes;
 786 } __attribute__((packed));
 787
 788 struct efivar_entry {
 789         struct efi_variable var;
 790         struct list_head list;
 791         struct kobject kobj;
 792 };
 793
 794 extern struct list_head efivar_sysfs_list;
 795
 796 static inline void
 797 efivar_unregister(struct efivar_entry *var)
 798 {
 799         kobject_put(&var->kobj);
 800 }
 801
 802 int efivars_register(struct efivars *efivars,
 803                      const struct efivar_operations *ops,
 804                      struct kobject *kobject);
 805 int efivars_unregister(struct efivars *efivars);
 806 struct kobject *efivars_kobject(void);
 807
 808 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
 809                 void *data, bool atomic, bool duplicates,
 810                 struct list_head *head);
 811
 812 void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
 813 void efivar_entry_remove(struct efivar_entry *entry);
 814
 815 int __efivar_entry_delete(struct efivar_entry *entry);
 816 int efivar_entry_delete(struct efivar_entry *entry);
 817
 818 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
 819 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
 820                        unsigned long *size, void *data);
 821 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
 822                      unsigned long *size, void *data);
 823 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
 824                      unsigned long size, void *data, struct list_head *head);
 825 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
 826                               unsigned long *size, void *data, bool *set);
 827 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
 828                           bool block, unsigned long size, void *data);
 829
 830 void efivar_entry_iter_begin(void);
 831 void efivar_entry_iter_end(void);
 832
 833 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
 834                         struct list_head *head, void *data,
 835                         struct efivar_entry **prev);
 836 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
 837                       struct list_head *head, void *data);
 838
 839 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
 840                                        struct list_head *head, bool remove);
 841
 842 bool efivar_validate(struct efi_variable *var, u8 *data, unsigned long len);
 843
 844 extern struct work_struct efivar_work;
 845 void efivar_run_worker(void);
 846
 847 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
 848 int efivars_sysfs_init(void);
 849
 850 #endif /* CONFIG_EFI_VARS */
 851
 852 #endif /* _LINUX_EFI_H */