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 typedef u64 efi_physical_addr_t;
  43 typedef void *efi_handle_t;
  44
  45
  46 typedef struct {
  47         u8 b[16];
  48 } efi_guid_t;
  49
  50 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  51 ((efi_guid_t) \
  52 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  53   (b) & 0xff, ((b) >> 8) & 0xff, \
  54   (c) & 0xff, ((c) >> 8) & 0xff, \
  55   (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  56
  57 /*
  58  * Generic EFI table header
  59  */
  60 typedef struct {
  61         u64 signature;
  62         u32 revision;
  63         u32 headersize;
  64         u32 crc32;
  65         u32 reserved;
  66 } efi_table_hdr_t;
  67
  68 /*
  69  * Memory map descriptor:
  70  */
  71
  72 /* Memory types: */
  73 #define EFI_RESERVED_TYPE                0
  74 #define EFI_LOADER_CODE                  1
  75 #define EFI_LOADER_DATA                  2
  76 #define EFI_BOOT_SERVICES_CODE           3
  77 #define EFI_BOOT_SERVICES_DATA           4
  78 #define EFI_RUNTIME_SERVICES_CODE        5
  79 #define EFI_RUNTIME_SERVICES_DATA        6
  80 #define EFI_CONVENTIONAL_MEMORY          7
  81 #define EFI_UNUSABLE_MEMORY              8
  82 #define EFI_ACPI_RECLAIM_MEMORY          9
  83 #define EFI_ACPI_MEMORY_NVS             10
  84 #define EFI_MEMORY_MAPPED_IO            11
  85 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
  86 #define EFI_PAL_CODE                    13
  87 #define EFI_MAX_MEMORY_TYPE             14
  88
  89 /* Attribute values: */
  90 #define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
  91 #define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
  92 #define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
  93 #define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
  94 #define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
  95 #define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
  96 #define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
  97 #define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
  98 #define EFI_MEMORY_DESCRIPTOR_VERSION   1
  99
 100 #define EFI_PAGE_SHIFT          12
 101 #define EFI_PAGE_SIZE           (1UL << EFI_PAGE_SHIFT)
 102
 103 typedef struct {
 104         u32 type;
 105         u32 pad;
 106         u64 phys_addr;
 107         u64 virt_addr;
 108         u64 num_pages;
 109         u64 attribute;
 110 } efi_memory_desc_t;
 111
 112 typedef struct {
 113         efi_guid_t guid;
 114         u32 headersize;
 115         u32 flags;
 116         u32 imagesize;
 117 } efi_capsule_header_t;
 118
 119 /*
 120  * Allocation types for calls to boottime->allocate_pages.
 121  */
 122 #define EFI_ALLOCATE_ANY_PAGES          0
 123 #define EFI_ALLOCATE_MAX_ADDRESS        1
 124 #define EFI_ALLOCATE_ADDRESS            2
 125 #define EFI_MAX_ALLOCATE_TYPE           3
 126
 127 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
 128
 129 /*
 130  * Types and defines for Time Services
 131  */
 132 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 133 #define EFI_TIME_IN_DAYLIGHT     0x2
 134 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 135
 136 typedef struct {
 137         u16 year;
 138         u8 month;
 139         u8 day;
 140         u8 hour;
 141         u8 minute;
 142         u8 second;
 143         u8 pad1;
 144         u32 nanosecond;
 145         s16 timezone;
 146         u8 daylight;
 147         u8 pad2;
 148 } efi_time_t;
 149
 150 typedef struct {
 151         u32 resolution;
 152         u32 accuracy;
 153         u8 sets_to_zero;
 154 } efi_time_cap_t;
 155
 156 /*
 157  * EFI Boot Services table
 158  */
 159 typedef struct {
 160         efi_table_hdr_t hdr;
 161         void *raise_tpl;
 162         void *restore_tpl;
 163         efi_status_t (*allocate_pages)(int, int, unsigned long,
 164                                        efi_physical_addr_t *);
 165         efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
 166         efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
 167                                        unsigned long *, u32 *);
 168         efi_status_t (*allocate_pool)(int, unsigned long, void **);
 169         efi_status_t (*free_pool)(void *);
 170         void *create_event;
 171         void *set_timer;
 172         void *wait_for_event;
 173         void *signal_event;
 174         void *close_event;
 175         void *check_event;
 176         void *install_protocol_interface;
 177         void *reinstall_protocol_interface;
 178         void *uninstall_protocol_interface;
 179         efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
 180         void *__reserved;
 181         void *register_protocol_notify;
 182         void *locate_handle;
 183         void *locate_device_path;
 184         void *install_configuration_table;
 185         void *load_image;
 186         void *start_image;
 187         void *exit;
 188         void *unload_image;
 189         efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
 190         void *get_next_monotonic_count;
 191         void *stall;
 192         void *set_watchdog_timer;
 193         void *connect_controller;
 194         void *disconnect_controller;
 195         void *open_protocol;
 196         void *close_protocol;
 197         void *open_protocol_information;
 198         void *protocols_per_handle;
 199         void *locate_handle_buffer;
 200         void *locate_protocol;
 201         void *install_multiple_protocol_interfaces;
 202         void *uninstall_multiple_protocol_interfaces;
 203         void *calculate_crc32;
 204         void *copy_mem;
 205         void *set_mem;
 206         void *create_event_ex;
 207 } efi_boot_services_t;
 208
 209 typedef enum {
 210         EfiPciIoWidthUint8,
 211         EfiPciIoWidthUint16,
 212         EfiPciIoWidthUint32,
 213         EfiPciIoWidthUint64,
 214         EfiPciIoWidthFifoUint8,
 215         EfiPciIoWidthFifoUint16,
 216         EfiPciIoWidthFifoUint32,
 217         EfiPciIoWidthFifoUint64,
 218         EfiPciIoWidthFillUint8,
 219         EfiPciIoWidthFillUint16,
 220         EfiPciIoWidthFillUint32,
 221         EfiPciIoWidthFillUint64,
 222         EfiPciIoWidthMaximum
 223 } EFI_PCI_IO_PROTOCOL_WIDTH;
 224
 225 typedef enum {
 226         EfiPciIoAttributeOperationGet,
 227         EfiPciIoAttributeOperationSet,
 228         EfiPciIoAttributeOperationEnable,
 229         EfiPciIoAttributeOperationDisable,
 230         EfiPciIoAttributeOperationSupported,
 231     EfiPciIoAttributeOperationMaximum
 232 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
 233
 234
 235 typedef struct {
 236         void *read;
 237         void *write;
 238 } efi_pci_io_protocol_access_t;
 239
 240 typedef struct {
 241         void *poll_mem;
 242         void *poll_io;
 243         efi_pci_io_protocol_access_t mem;
 244         efi_pci_io_protocol_access_t io;
 245         efi_pci_io_protocol_access_t pci;
 246         void *copy_mem;
 247         void *map;
 248         void *unmap;
 249         void *allocate_buffer;
 250         void *free_buffer;
 251         void *flush;
 252         void *get_location;
 253         void *attributes;
 254         void *get_bar_attributes;
 255         void *set_bar_attributes;
 256         uint64_t romsize;
 257         void *romimage;
 258 } efi_pci_io_protocol;
 259
 260 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
 261 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
 262 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
 263 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
 264 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
 265 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
 266 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
 267 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
 268 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
 269 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
 270 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
 271 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
 272 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
 273 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
 274 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
 275 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
 276 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
 277 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
 278 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
 279
 280 /*
 281  * Types and defines for EFI ResetSystem
 282  */
 283 #define EFI_RESET_COLD 0
 284 #define EFI_RESET_WARM 1
 285 #define EFI_RESET_SHUTDOWN 2
 286
 287 /*
 288  * EFI Runtime Services table
 289  */
 290 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 291 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 292
 293 typedef struct {
 294         efi_table_hdr_t hdr;
 295         void *get_time;
 296         void *set_time;
 297         void *get_wakeup_time;
 298         void *set_wakeup_time;
 299         void *set_virtual_address_map;
 300         void *convert_pointer;
 301         void *get_variable;
 302         void *get_next_variable;
 303         void *set_variable;
 304         void *get_next_high_mono_count;
 305         void *reset_system;
 306         void *update_capsule;
 307         void *query_capsule_caps;
 308         void *query_variable_info;
 309 } efi_runtime_services_t;
 310
 311 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 312 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 313 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 314                                             efi_time_t *tm);
 315 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 316 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 317                                          unsigned long *data_size, void *data);
 318 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 319                                               efi_guid_t *vendor);
 320 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 321                                          u32 attr, unsigned long data_size,
 322                                          void *data);
 323 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 324 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 325                                  unsigned long data_size, efi_char16_t *data);
 326 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 327                                                 unsigned long descriptor_size,
 328                                                 u32 descriptor_version,
 329                                                 efi_memory_desc_t *virtual_map);
 330 typedef efi_status_t efi_query_variable_info_t(u32 attr,
 331                                                u64 *storage_space,
 332                                                u64 *remaining_space,
 333                                                u64 *max_variable_size);
 334 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 335                                           unsigned long count,
 336                                           unsigned long sg_list);
 337 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 338                                               unsigned long count,
 339                                               u64 *max_size,
 340                                               int *reset_type);
 341 typedef efi_status_t efi_query_variable_store_t(u32 attributes, unsigned long size);
 342
 343 /*
 344  *  EFI Configuration Table and GUID definitions
 345  */
 346 #define NULL_GUID \
 347     EFI_GUID(  0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
 348
 349 #define MPS_TABLE_GUID    \
 350     EFI_GUID(  0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 351
 352 #define ACPI_TABLE_GUID    \
 353     EFI_GUID(  0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 354
 355 #define ACPI_20_TABLE_GUID    \
 356     EFI_GUID(  0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
 357
 358 #define SMBIOS_TABLE_GUID    \
 359     EFI_GUID(  0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 360
 361 #define SAL_SYSTEM_TABLE_GUID    \
 362     EFI_GUID(  0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 363
 364 #define HCDP_TABLE_GUID \
 365     EFI_GUID(  0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
 366
 367 #define UGA_IO_PROTOCOL_GUID \
 368     EFI_GUID(  0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
 369
 370 #define EFI_GLOBAL_VARIABLE_GUID \
 371     EFI_GUID(  0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
 372
 373 #define UV_SYSTEM_TABLE_GUID \
 374     EFI_GUID(  0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
 375
 376 #define LINUX_EFI_CRASH_GUID \
 377     EFI_GUID(  0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
 378
 379 #define LOADED_IMAGE_PROTOCOL_GUID \
 380     EFI_GUID(  0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 381
 382 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
 383     EFI_GUID(  0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
 384
 385 #define EFI_UGA_PROTOCOL_GUID \
 386     EFI_GUID(  0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
 387
 388 #define EFI_PCI_IO_PROTOCOL_GUID \
 389     EFI_GUID(  0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
 390
 391 #define EFI_FILE_INFO_ID \
 392     EFI_GUID(  0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 393
 394 #define EFI_FILE_SYSTEM_GUID \
 395     EFI_GUID(  0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
 396
 397 typedef struct {
 398         efi_guid_t guid;
 399         u64 table;
 400 } efi_config_table_64_t;
 401
 402 typedef struct {
 403         efi_guid_t guid;
 404         u32 table;
 405 } efi_config_table_32_t;
 406
 407 typedef struct {
 408         efi_guid_t guid;
 409         unsigned long table;
 410 } efi_config_table_t;
 411
 412 typedef struct {
 413         efi_guid_t guid;
 414         const char *name;
 415         unsigned long *ptr;
 416 } efi_config_table_type_t;
 417
 418 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 419
 420 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 421 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 422 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 423 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 424 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 425 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 426
 427 typedef struct {
 428         efi_table_hdr_t hdr;
 429         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 430         u32 fw_revision;
 431         u32 __pad1;
 432         u64 con_in_handle;
 433         u64 con_in;
 434         u64 con_out_handle;
 435         u64 con_out;
 436         u64 stderr_handle;
 437         u64 stderr;
 438         u64 runtime;
 439         u64 boottime;
 440         u32 nr_tables;
 441         u32 __pad2;
 442         u64 tables;
 443 } efi_system_table_64_t;
 444
 445 typedef struct {
 446         efi_table_hdr_t hdr;
 447         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 448         u32 fw_revision;
 449         u32 con_in_handle;
 450         u32 con_in;
 451         u32 con_out_handle;
 452         u32 con_out;
 453         u32 stderr_handle;
 454         u32 stderr;
 455         u32 runtime;
 456         u32 boottime;
 457         u32 nr_tables;
 458         u32 tables;
 459 } efi_system_table_32_t;
 460
 461 typedef struct {
 462         efi_table_hdr_t hdr;
 463         unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 464         u32 fw_revision;
 465         unsigned long con_in_handle;
 466         unsigned long con_in;
 467         unsigned long con_out_handle;
 468         unsigned long con_out;
 469         unsigned long stderr_handle;
 470         unsigned long stderr;
 471         efi_runtime_services_t *runtime;
 472         efi_boot_services_t *boottime;
 473         unsigned long nr_tables;
 474         unsigned long tables;
 475 } efi_system_table_t;
 476
 477 struct efi_memory_map {
 478         void *phys_map;
 479         void *map;
 480         void *map_end;
 481         int nr_map;
 482         unsigned long desc_version;
 483         unsigned long desc_size;
 484 };
 485
 486 typedef struct {
 487         u32 revision;
 488         void *parent_handle;
 489         efi_system_table_t *system_table;
 490         void *device_handle;
 491         void *file_path;
 492         void *reserved;
 493         u32 load_options_size;
 494         void *load_options;
 495         void *image_base;
 496         __aligned_u64 image_size;
 497         unsigned int image_code_type;
 498         unsigned int image_data_type;
 499         unsigned long unload;
 500 } efi_loaded_image_t;
 501
 502
 503 typedef struct {
 504         u64 size;
 505         u64 file_size;
 506         u64 phys_size;
 507         efi_time_t create_time;
 508         efi_time_t last_access_time;
 509         efi_time_t modification_time;
 510         __aligned_u64 attribute;
 511         efi_char16_t filename[1];
 512 } efi_file_info_t;
 513
 514 typedef struct _efi_file_handle {
 515         u64 revision;
 516         efi_status_t (*open)(struct _efi_file_handle *,
 517                              struct _efi_file_handle **,
 518                              efi_char16_t *, u64, u64);
 519         efi_status_t (*close)(struct _efi_file_handle *);
 520         void *delete;
 521         efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
 522                              void *);
 523         void *write;
 524         void *get_position;
 525         void *set_position;
 526         efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
 527                         unsigned long *, void *);
 528         void *set_info;
 529         void *flush;
 530 } efi_file_handle_t;
 531
 532 typedef struct _efi_file_io_interface {
 533         u64 revision;
 534         int (*open_volume)(struct _efi_file_io_interface *,
 535                            efi_file_handle_t **);
 536 } efi_file_io_interface_t;
 537
 538 #define EFI_FILE_MODE_READ      0x0000000000000001
 539 #define EFI_FILE_MODE_WRITE     0x0000000000000002
 540 #define EFI_FILE_MODE_CREATE    0x8000000000000000
 541
 542 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 543
 544 /*
 545  * All runtime access to EFI goes through this structure:
 546  */
 547 extern struct efi {
 548         efi_system_table_t *systab;     /* EFI system table */
 549         unsigned int runtime_version;   /* Runtime services version */
 550         unsigned long mps;              /* MPS table */
 551         unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
 552         unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
 553         unsigned long smbios;           /* SM BIOS table */
 554         unsigned long sal_systab;       /* SAL system table */
 555         unsigned long boot_info;        /* boot info table */
 556         unsigned long hcdp;             /* HCDP table */
 557         unsigned long uga;              /* UGA table */
 558         unsigned long uv_systab;        /* UV system table */
 559         efi_get_time_t *get_time;
 560         efi_set_time_t *set_time;
 561         efi_get_wakeup_time_t *get_wakeup_time;
 562         efi_set_wakeup_time_t *set_wakeup_time;
 563         efi_get_variable_t *get_variable;
 564         efi_get_next_variable_t *get_next_variable;
 565         efi_set_variable_t *set_variable;
 566         efi_query_variable_info_t *query_variable_info;
 567         efi_update_capsule_t *update_capsule;
 568         efi_query_capsule_caps_t *query_capsule_caps;
 569         efi_get_next_high_mono_count_t *get_next_high_mono_count;
 570         efi_reset_system_t *reset_system;
 571         efi_set_virtual_address_map_t *set_virtual_address_map;
 572         struct efi_memory_map *memmap;
 573 } efi;
 574
 575 static inline int
 576 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 577 {
 578         return memcmp(&left, &right, sizeof (efi_guid_t));
 579 }
 580
 581 static inline char *
 582 efi_guid_unparse(efi_guid_t *guid, char *out)
 583 {
 584         sprintf(out, "%pUl", guid->b);
 585         return out;
 586 }
 587
 588 extern void efi_init (void);
 589 extern void *efi_get_pal_addr (void);
 590 extern void efi_map_pal_code (void);
 591 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 592 extern void efi_gettimeofday (struct timespec *ts);
 593 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 594 #ifdef CONFIG_X86
 595 extern void efi_late_init(void);
 596 extern void efi_free_boot_services(void);
 597 extern efi_status_t efi_query_variable_store(u32 attributes, unsigned long size);
 598 #else
 599 static inline void efi_late_init(void) {}
 600 static inline void efi_free_boot_services(void) {}
 601
 602 static inline efi_status_t efi_query_variable_store(u32 attributes, unsigned long size)
 603 {
 604         return EFI_SUCCESS;
 605 }
 606 #endif
 607 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 608 extern int efi_config_init(efi_config_table_type_t *arch_tables);
 609 extern u64 efi_get_iobase (void);
 610 extern u32 efi_mem_type (unsigned long phys_addr);
 611 extern u64 efi_mem_attributes (unsigned long phys_addr);
 612 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 613 extern int __init efi_uart_console_only (void);
 614 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 615                 struct resource *data_resource, struct resource *bss_resource);
 616 extern void efi_get_time(struct timespec *now);
 617 extern int efi_set_rtc_mmss(const struct timespec *now);
 618 extern void efi_reserve_boot_services(void);
 619 extern struct efi_memory_map memmap;
 620
 621 /**
 622  * efi_range_is_wc - check the WC bit on an address range
 623  * @start: starting kvirt address
 624  * @len: length of range
 625  *
 626  * Consult the EFI memory map and make sure it's ok to set this range WC.
 627  * Returns true or false.
 628  */
 629 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 630 {
 631         unsigned long i;
 632
 633         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 634                 unsigned long paddr = __pa(start + i);
 635                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 636                         return 0;
 637         }
 638         /* The range checked out */
 639         return 1;
 640 }
 641
 642 #ifdef CONFIG_EFI_PCDP
 643 extern int __init efi_setup_pcdp_console(char *);
 644 #endif
 645
 646 /*
 647  * We play games with efi_enabled so that the compiler will, if
 648  * possible, remove EFI-related code altogether.
 649  */
 650 #define EFI_BOOT                0       /* Were we booted from EFI? */
 651 #define EFI_SYSTEM_TABLES       1       /* Can we use EFI system tables? */
 652 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
 653 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
 654 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
 655 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
 656
 657 #ifdef CONFIG_EFI
 658 # ifdef CONFIG_X86
 659 extern int efi_enabled(int facility);
 660 # else
 661 static inline int efi_enabled(int facility)
 662 {
 663         return 1;
 664 }
 665 # endif
 666 #else
 667 static inline int efi_enabled(int facility)
 668 {
 669         return 0;
 670 }
 671 #endif
 672
 673 /*
 674  * Variable Attributes
 675  */
 676 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 677 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 678 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 679 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
 680 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
 681 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
 682 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
 683
 684 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
 685                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
 686                                 EFI_VARIABLE_RUNTIME_ACCESS | \
 687                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
 688                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
 689                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
 690                                 EFI_VARIABLE_APPEND_WRITE)
 691 /*
 692  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
 693  * not including trailing NUL
 694  */
 695 #define EFI_VARIABLE_GUID_LEN 36
 696
 697 /*
 698  * The type of search to perform when calling boottime->locate_handle
 699  */
 700 #define EFI_LOCATE_ALL_HANDLES                  0
 701 #define EFI_LOCATE_BY_REGISTER_NOTIFY           1
 702 #define EFI_LOCATE_BY_PROTOCOL                  2
 703
 704 /*
 705  * EFI Device Path information
 706  */
 707 #define EFI_DEV_HW                      0x01
 708 #define  EFI_DEV_PCI                             1
 709 #define  EFI_DEV_PCCARD                          2
 710 #define  EFI_DEV_MEM_MAPPED                      3
 711 #define  EFI_DEV_VENDOR                          4
 712 #define  EFI_DEV_CONTROLLER                      5
 713 #define EFI_DEV_ACPI                    0x02
 714 #define   EFI_DEV_BASIC_ACPI                     1
 715 #define   EFI_DEV_EXPANDED_ACPI                  2
 716 #define EFI_DEV_MSG                     0x03
 717 #define   EFI_DEV_MSG_ATAPI                      1
 718 #define   EFI_DEV_MSG_SCSI                       2
 719 #define   EFI_DEV_MSG_FC                         3
 720 #define   EFI_DEV_MSG_1394                       4
 721 #define   EFI_DEV_MSG_USB                        5
 722 #define   EFI_DEV_MSG_USB_CLASS                 15
 723 #define   EFI_DEV_MSG_I20                        6
 724 #define   EFI_DEV_MSG_MAC                       11
 725 #define   EFI_DEV_MSG_IPV4                      12
 726 #define   EFI_DEV_MSG_IPV6                      13
 727 #define   EFI_DEV_MSG_INFINIBAND                 9
 728 #define   EFI_DEV_MSG_UART                      14
 729 #define   EFI_DEV_MSG_VENDOR                    10
 730 #define EFI_DEV_MEDIA                   0x04
 731 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
 732 #define   EFI_DEV_MEDIA_CDROM                    2
 733 #define   EFI_DEV_MEDIA_VENDOR                   3
 734 #define   EFI_DEV_MEDIA_FILE                     4
 735 #define   EFI_DEV_MEDIA_PROTOCOL                 5
 736 #define EFI_DEV_BIOS_BOOT               0x05
 737 #define EFI_DEV_END_PATH                0x7F
 738 #define EFI_DEV_END_PATH2               0xFF
 739 #define   EFI_DEV_END_INSTANCE                  0x01
 740 #define   EFI_DEV_END_ENTIRE                    0xFF
 741
 742 struct efi_generic_dev_path {
 743         u8 type;
 744         u8 sub_type;
 745         u16 length;
 746 } __attribute ((packed));
 747
 748 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
 749 {
 750         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
 751         *addr &= PAGE_MASK;
 752 }
 753
 754 /*
 755  * EFI Variable support.
 756  *
 757  * Different firmware drivers can expose their EFI-like variables using
 758  * the following.
 759  */
 760
 761 struct efivar_operations {
 762         efi_get_variable_t *get_variable;
 763         efi_get_next_variable_t *get_next_variable;
 764         efi_set_variable_t *set_variable;
 765         efi_query_variable_store_t *query_variable_store;
 766 };
 767
 768 struct efivars {
 769         /*
 770          * ->lock protects two things:
 771          * 1) ->list - adds, removals, reads, writes
 772          * 2) ops.[gs]et_variable() calls.
 773          * It must not be held when creating sysfs entries or calling kmalloc.
 774          * ops.get_next_variable() is only called from register_efivars()
 775          * or efivar_update_sysfs_entries(),
 776          * which is protected by the BKL, so that path is safe.
 777          */
 778         spinlock_t lock;
 779         struct kset *kset;
 780         struct kobject *kobject;
 781         const struct efivar_operations *ops;
 782 };
 783
 784 /*
 785  * The maximum size of VariableName + Data = 1024
 786  * Therefore, it's reasonable to save that much
 787  * space in each part of the structure,
 788  * and we use a page for reading/writing.
 789  */
 790
 791 struct efi_variable {
 792         efi_char16_t  VariableName[1024/sizeof(efi_char16_t)];
 793         efi_guid_t    VendorGuid;
 794         unsigned long DataSize;
 795         __u8          Data[1024];
 796         efi_status_t  Status;
 797         __u32         Attributes;
 798 } __attribute__((packed));
 799
 800 struct efivar_entry {
 801         struct efi_variable var;
 802         struct list_head list;
 803         struct kobject kobj;
 804 };
 805
 806
 807 struct efi_simple_text_output_protocol {
 808         void *reset;
 809         efi_status_t (*output_string)(void *, void *);
 810         void *test_string;
 811 };
 812
 813 extern struct list_head efivar_sysfs_list;
 814
 815 static inline void
 816 efivar_unregister(struct efivar_entry *var)
 817 {
 818         kobject_put(&var->kobj);
 819 }
 820
 821 int efivars_register(struct efivars *efivars,
 822                      const struct efivar_operations *ops,
 823                      struct kobject *kobject);
 824 int efivars_unregister(struct efivars *efivars);
 825 struct kobject *efivars_kobject(void);
 826
 827 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
 828                 void *data, bool atomic, bool duplicates,
 829                 struct list_head *head);
 830
 831 void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
 832 void efivar_entry_remove(struct efivar_entry *entry);
 833
 834 int __efivar_entry_delete(struct efivar_entry *entry);
 835 int efivar_entry_delete(struct efivar_entry *entry);
 836
 837 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
 838 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
 839                        unsigned long *size, void *data);
 840 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
 841                      unsigned long *size, void *data);
 842 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
 843                      unsigned long size, void *data, struct list_head *head);
 844 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
 845                               unsigned long *size, void *data, bool *set);
 846 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
 847                           bool block, unsigned long size, void *data);
 848
 849 void efivar_entry_iter_begin(void);
 850 void efivar_entry_iter_end(void);
 851
 852 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
 853                         struct list_head *head, void *data,
 854                         struct efivar_entry **prev);
 855 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
 856                       struct list_head *head, void *data);
 857
 858 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
 859                                        struct list_head *head, bool remove);
 860
 861 bool efivar_validate(struct efi_variable *var, u8 *data, unsigned long len);
 862
 863 extern struct work_struct efivar_work;
 864 void efivar_run_worker(void);
 865
 866 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
 867 int efivars_sysfs_init(void);
 868
 869 #endif /* CONFIG_EFI_VARS */
 870
 871 #endif /* _LINUX_EFI_H */