include/linux/efi.h

   1 #ifndef _LINUX_EFI_H
   2 #define _LINUX_EFI_H
   3
   4 /*
   5  * Extensible Firmware Interface
   6  * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
   7  *
   8  * Copyright (C) 1999 VA Linux Systems
   9  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
  10  * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
  11  *      David Mosberger-Tang <davidm@hpl.hp.com>
  12  *      Stephane Eranian <eranian@hpl.hp.com>
  13  */
  14 #include <linux/init.h>
  15 #include <linux/string.h>
  16 #include <linux/time.h>
  17 #include <linux/types.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/rtc.h>
  20 #include <linux/ioport.h>
  21 #include <linux/pfn.h>
  22 #include <linux/pstore.h>
  23 #include <linux/reboot.h>
  24 #include <linux/uuid.h>
  25 #include <linux/screen_info.h>
  26
  27 #include <asm/page.h>
  28
  29 #define EFI_SUCCESS             0
  30 #define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
  31 #define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
  32 #define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
  33 #define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
  34 #define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
  35 #define EFI_NOT_READY           ( 6 | (1UL << (BITS_PER_LONG-1)))
  36 #define EFI_DEVICE_ERROR        ( 7 | (1UL << (BITS_PER_LONG-1)))
  37 #define EFI_WRITE_PROTECTED     ( 8 | (1UL << (BITS_PER_LONG-1)))
  38 #define EFI_OUT_OF_RESOURCES    ( 9 | (1UL << (BITS_PER_LONG-1)))
  39 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  40 #define EFI_SECURITY_VIOLATION  (26 | (1UL << (BITS_PER_LONG-1)))
  41
  42 typedef unsigned long efi_status_t;
  43 typedef u8 efi_bool_t;
  44 typedef u16 efi_char16_t;               /* UNICODE character */
  45 typedef u64 efi_physical_addr_t;
  46 typedef void *efi_handle_t;
  47
  48 typedef uuid_le efi_guid_t;
  49
  50 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  51         UUID_LE(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
  52
  53 /*
  54  * Generic EFI table header
  55  */
  56 typedef struct {
  57         u64 signature;
  58         u32 revision;
  59         u32 headersize;
  60         u32 crc32;
  61         u32 reserved;
  62 } efi_table_hdr_t;
  63
  64 /*
  65  * Memory map descriptor:
  66  */
  67
  68 /* Memory types: */
  69 #define EFI_RESERVED_TYPE                0
  70 #define EFI_LOADER_CODE                  1
  71 #define EFI_LOADER_DATA                  2
  72 #define EFI_BOOT_SERVICES_CODE           3
  73 #define EFI_BOOT_SERVICES_DATA           4
  74 #define EFI_RUNTIME_SERVICES_CODE        5
  75 #define EFI_RUNTIME_SERVICES_DATA        6
  76 #define EFI_CONVENTIONAL_MEMORY          7
  77 #define EFI_UNUSABLE_MEMORY              8
  78 #define EFI_ACPI_RECLAIM_MEMORY          9
  79 #define EFI_ACPI_MEMORY_NVS             10
  80 #define EFI_MEMORY_MAPPED_IO            11
  81 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
  82 #define EFI_PAL_CODE                    13
  83 #define EFI_PERSISTENT_MEMORY           14
  84 #define EFI_MAX_MEMORY_TYPE             15
  85
  86 /* Attribute values: */
  87 #define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
  88 #define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
  89 #define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
  90 #define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
  91 #define EFI_MEMORY_UCE          ((u64)0x0000000000000010ULL)    /* uncached, exported */
  92 #define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
  93 #define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
  94 #define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
  95 #define EFI_MEMORY_NV           ((u64)0x0000000000008000ULL)    /* non-volatile */
  96 #define EFI_MEMORY_MORE_RELIABLE \
  97                                 ((u64)0x0000000000010000ULL)    /* higher reliability */
  98 #define EFI_MEMORY_RO           ((u64)0x0000000000020000ULL)    /* read-only */
  99 #define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
 100 #define EFI_MEMORY_DESCRIPTOR_VERSION   1
 101
 102 #define EFI_PAGE_SHIFT          12
 103 #define EFI_PAGE_SIZE           (1UL << EFI_PAGE_SHIFT)
 104
 105 typedef struct {
 106         u32 type;
 107         u32 pad;
 108         u64 phys_addr;
 109         u64 virt_addr;
 110         u64 num_pages;
 111         u64 attribute;
 112 } efi_memory_desc_t;
 113
 114 typedef struct {
 115         efi_guid_t guid;
 116         u32 headersize;
 117         u32 flags;
 118         u32 imagesize;
 119 } efi_capsule_header_t;
 120
 121 /*
 122  * EFI capsule flags
 123  */
 124 #define EFI_CAPSULE_PERSIST_ACROSS_RESET        0x00010000
 125 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE       0x00020000
 126 #define EFI_CAPSULE_INITIATE_RESET              0x00040000
 127
 128 /*
 129  * Allocation types for calls to boottime->allocate_pages.
 130  */
 131 #define EFI_ALLOCATE_ANY_PAGES          0
 132 #define EFI_ALLOCATE_MAX_ADDRESS        1
 133 #define EFI_ALLOCATE_ADDRESS            2
 134 #define EFI_MAX_ALLOCATE_TYPE           3
 135
 136 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
 137
 138 /*
 139  * Types and defines for Time Services
 140  */
 141 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 142 #define EFI_TIME_IN_DAYLIGHT     0x2
 143 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 144
 145 typedef struct {
 146         u16 year;
 147         u8 month;
 148         u8 day;
 149         u8 hour;
 150         u8 minute;
 151         u8 second;
 152         u8 pad1;
 153         u32 nanosecond;
 154         s16 timezone;
 155         u8 daylight;
 156         u8 pad2;
 157 } efi_time_t;
 158
 159 typedef struct {
 160         u32 resolution;
 161         u32 accuracy;
 162         u8 sets_to_zero;
 163 } efi_time_cap_t;
 164
 165 typedef struct {
 166         efi_table_hdr_t hdr;
 167         u32 raise_tpl;
 168         u32 restore_tpl;
 169         u32 allocate_pages;
 170         u32 free_pages;
 171         u32 get_memory_map;
 172         u32 allocate_pool;
 173         u32 free_pool;
 174         u32 create_event;
 175         u32 set_timer;
 176         u32 wait_for_event;
 177         u32 signal_event;
 178         u32 close_event;
 179         u32 check_event;
 180         u32 install_protocol_interface;
 181         u32 reinstall_protocol_interface;
 182         u32 uninstall_protocol_interface;
 183         u32 handle_protocol;
 184         u32 __reserved;
 185         u32 register_protocol_notify;
 186         u32 locate_handle;
 187         u32 locate_device_path;
 188         u32 install_configuration_table;
 189         u32 load_image;
 190         u32 start_image;
 191         u32 exit;
 192         u32 unload_image;
 193         u32 exit_boot_services;
 194         u32 get_next_monotonic_count;
 195         u32 stall;
 196         u32 set_watchdog_timer;
 197         u32 connect_controller;
 198         u32 disconnect_controller;
 199         u32 open_protocol;
 200         u32 close_protocol;
 201         u32 open_protocol_information;
 202         u32 protocols_per_handle;
 203         u32 locate_handle_buffer;
 204         u32 locate_protocol;
 205         u32 install_multiple_protocol_interfaces;
 206         u32 uninstall_multiple_protocol_interfaces;
 207         u32 calculate_crc32;
 208         u32 copy_mem;
 209         u32 set_mem;
 210         u32 create_event_ex;
 211 } __packed efi_boot_services_32_t;
 212
 213 typedef struct {
 214         efi_table_hdr_t hdr;
 215         u64 raise_tpl;
 216         u64 restore_tpl;
 217         u64 allocate_pages;
 218         u64 free_pages;
 219         u64 get_memory_map;
 220         u64 allocate_pool;
 221         u64 free_pool;
 222         u64 create_event;
 223         u64 set_timer;
 224         u64 wait_for_event;
 225         u64 signal_event;
 226         u64 close_event;
 227         u64 check_event;
 228         u64 install_protocol_interface;
 229         u64 reinstall_protocol_interface;
 230         u64 uninstall_protocol_interface;
 231         u64 handle_protocol;
 232         u64 __reserved;
 233         u64 register_protocol_notify;
 234         u64 locate_handle;
 235         u64 locate_device_path;
 236         u64 install_configuration_table;
 237         u64 load_image;
 238         u64 start_image;
 239         u64 exit;
 240         u64 unload_image;
 241         u64 exit_boot_services;
 242         u64 get_next_monotonic_count;
 243         u64 stall;
 244         u64 set_watchdog_timer;
 245         u64 connect_controller;
 246         u64 disconnect_controller;
 247         u64 open_protocol;
 248         u64 close_protocol;
 249         u64 open_protocol_information;
 250         u64 protocols_per_handle;
 251         u64 locate_handle_buffer;
 252         u64 locate_protocol;
 253         u64 install_multiple_protocol_interfaces;
 254         u64 uninstall_multiple_protocol_interfaces;
 255         u64 calculate_crc32;
 256         u64 copy_mem;
 257         u64 set_mem;
 258         u64 create_event_ex;
 259 } __packed efi_boot_services_64_t;
 260
 261 /*
 262  * EFI Boot Services table
 263  */
 264 typedef struct {
 265         efi_table_hdr_t hdr;
 266         void *raise_tpl;
 267         void *restore_tpl;
 268         efi_status_t (*allocate_pages)(int, int, unsigned long,
 269                                        efi_physical_addr_t *);
 270         efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
 271         efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
 272                                        unsigned long *, u32 *);
 273         efi_status_t (*allocate_pool)(int, unsigned long, void **);
 274         efi_status_t (*free_pool)(void *);
 275         void *create_event;
 276         void *set_timer;
 277         void *wait_for_event;
 278         void *signal_event;
 279         void *close_event;
 280         void *check_event;
 281         void *install_protocol_interface;
 282         void *reinstall_protocol_interface;
 283         void *uninstall_protocol_interface;
 284         efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
 285         void *__reserved;
 286         void *register_protocol_notify;
 287         efi_status_t (*locate_handle)(int, efi_guid_t *, void *,
 288                                       unsigned long *, efi_handle_t *);
 289         void *locate_device_path;
 290         efi_status_t (*install_configuration_table)(efi_guid_t *, void *);
 291         void *load_image;
 292         void *start_image;
 293         void *exit;
 294         void *unload_image;
 295         efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
 296         void *get_next_monotonic_count;
 297         void *stall;
 298         void *set_watchdog_timer;
 299         void *connect_controller;
 300         void *disconnect_controller;
 301         void *open_protocol;
 302         void *close_protocol;
 303         void *open_protocol_information;
 304         void *protocols_per_handle;
 305         void *locate_handle_buffer;
 306         efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
 307         void *install_multiple_protocol_interfaces;
 308         void *uninstall_multiple_protocol_interfaces;
 309         void *calculate_crc32;
 310         void *copy_mem;
 311         void *set_mem;
 312         void *create_event_ex;
 313 } efi_boot_services_t;
 314
 315 typedef enum {
 316         EfiPciIoWidthUint8,
 317         EfiPciIoWidthUint16,
 318         EfiPciIoWidthUint32,
 319         EfiPciIoWidthUint64,
 320         EfiPciIoWidthFifoUint8,
 321         EfiPciIoWidthFifoUint16,
 322         EfiPciIoWidthFifoUint32,
 323         EfiPciIoWidthFifoUint64,
 324         EfiPciIoWidthFillUint8,
 325         EfiPciIoWidthFillUint16,
 326         EfiPciIoWidthFillUint32,
 327         EfiPciIoWidthFillUint64,
 328         EfiPciIoWidthMaximum
 329 } EFI_PCI_IO_PROTOCOL_WIDTH;
 330
 331 typedef enum {
 332         EfiPciIoAttributeOperationGet,
 333         EfiPciIoAttributeOperationSet,
 334         EfiPciIoAttributeOperationEnable,
 335         EfiPciIoAttributeOperationDisable,
 336         EfiPciIoAttributeOperationSupported,
 337     EfiPciIoAttributeOperationMaximum
 338 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
 339
 340 typedef struct {
 341         u32 read;
 342         u32 write;
 343 } efi_pci_io_protocol_access_32_t;
 344
 345 typedef struct {
 346         u64 read;
 347         u64 write;
 348 } efi_pci_io_protocol_access_64_t;
 349
 350 typedef struct {
 351         void *read;
 352         void *write;
 353 } efi_pci_io_protocol_access_t;
 354
 355 typedef struct {
 356         u32 poll_mem;
 357         u32 poll_io;
 358         efi_pci_io_protocol_access_32_t mem;
 359         efi_pci_io_protocol_access_32_t io;
 360         efi_pci_io_protocol_access_32_t pci;
 361         u32 copy_mem;
 362         u32 map;
 363         u32 unmap;
 364         u32 allocate_buffer;
 365         u32 free_buffer;
 366         u32 flush;
 367         u32 get_location;
 368         u32 attributes;
 369         u32 get_bar_attributes;
 370         u32 set_bar_attributes;
 371         uint64_t romsize;
 372         void *romimage;
 373 } efi_pci_io_protocol_32;
 374
 375 typedef struct {
 376         u64 poll_mem;
 377         u64 poll_io;
 378         efi_pci_io_protocol_access_64_t mem;
 379         efi_pci_io_protocol_access_64_t io;
 380         efi_pci_io_protocol_access_64_t pci;
 381         u64 copy_mem;
 382         u64 map;
 383         u64 unmap;
 384         u64 allocate_buffer;
 385         u64 free_buffer;
 386         u64 flush;
 387         u64 get_location;
 388         u64 attributes;
 389         u64 get_bar_attributes;
 390         u64 set_bar_attributes;
 391         uint64_t romsize;
 392         void *romimage;
 393 } efi_pci_io_protocol_64;
 394
 395 typedef struct {
 396         void *poll_mem;
 397         void *poll_io;
 398         efi_pci_io_protocol_access_t mem;
 399         efi_pci_io_protocol_access_t io;
 400         efi_pci_io_protocol_access_t pci;
 401         void *copy_mem;
 402         void *map;
 403         void *unmap;
 404         void *allocate_buffer;
 405         void *free_buffer;
 406         void *flush;
 407         void *get_location;
 408         void *attributes;
 409         void *get_bar_attributes;
 410         void *set_bar_attributes;
 411         uint64_t romsize;
 412         void *romimage;
 413 } efi_pci_io_protocol;
 414
 415 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
 416 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
 417 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
 418 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
 419 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
 420 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
 421 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
 422 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
 423 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
 424 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
 425 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
 426 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
 427 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
 428 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
 429 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
 430 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
 431 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
 432 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
 433 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
 434
 435 /*
 436  * Types and defines for EFI ResetSystem
 437  */
 438 #define EFI_RESET_COLD 0
 439 #define EFI_RESET_WARM 1
 440 #define EFI_RESET_SHUTDOWN 2
 441
 442 /*
 443  * EFI Runtime Services table
 444  */
 445 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 446 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 447
 448 typedef struct {
 449         efi_table_hdr_t hdr;
 450         u32 get_time;
 451         u32 set_time;
 452         u32 get_wakeup_time;
 453         u32 set_wakeup_time;
 454         u32 set_virtual_address_map;
 455         u32 convert_pointer;
 456         u32 get_variable;
 457         u32 get_next_variable;
 458         u32 set_variable;
 459         u32 get_next_high_mono_count;
 460         u32 reset_system;
 461         u32 update_capsule;
 462         u32 query_capsule_caps;
 463         u32 query_variable_info;
 464 } efi_runtime_services_32_t;
 465
 466 typedef struct {
 467         efi_table_hdr_t hdr;
 468         u64 get_time;
 469         u64 set_time;
 470         u64 get_wakeup_time;
 471         u64 set_wakeup_time;
 472         u64 set_virtual_address_map;
 473         u64 convert_pointer;
 474         u64 get_variable;
 475         u64 get_next_variable;
 476         u64 set_variable;
 477         u64 get_next_high_mono_count;
 478         u64 reset_system;
 479         u64 update_capsule;
 480         u64 query_capsule_caps;
 481         u64 query_variable_info;
 482 } efi_runtime_services_64_t;
 483
 484 typedef struct {
 485         efi_table_hdr_t hdr;
 486         void *get_time;
 487         void *set_time;
 488         void *get_wakeup_time;
 489         void *set_wakeup_time;
 490         void *set_virtual_address_map;
 491         void *convert_pointer;
 492         void *get_variable;
 493         void *get_next_variable;
 494         void *set_variable;
 495         void *get_next_high_mono_count;
 496         void *reset_system;
 497         void *update_capsule;
 498         void *query_capsule_caps;
 499         void *query_variable_info;
 500 } efi_runtime_services_t;
 501
 502 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 503 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 504 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 505                                             efi_time_t *tm);
 506 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 507 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 508                                          unsigned long *data_size, void *data);
 509 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 510                                               efi_guid_t *vendor);
 511 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 512                                          u32 attr, unsigned long data_size,
 513                                          void *data);
 514 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 515 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 516                                  unsigned long data_size, efi_char16_t *data);
 517 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 518                                                 unsigned long descriptor_size,
 519                                                 u32 descriptor_version,
 520                                                 efi_memory_desc_t *virtual_map);
 521 typedef efi_status_t efi_query_variable_info_t(u32 attr,
 522                                                u64 *storage_space,
 523                                                u64 *remaining_space,
 524                                                u64 *max_variable_size);
 525 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
 526                                           unsigned long count,
 527                                           unsigned long sg_list);
 528 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
 529                                               unsigned long count,
 530                                               u64 *max_size,
 531                                               int *reset_type);
 532 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
 533                                                 unsigned long size,
 534                                                 bool nonblocking);
 535
 536 void efi_native_runtime_setup(void);
 537
 538 /*
 539  * EFI Configuration Table and GUID definitions
 540  *
 541  * These are all defined in a single line to make them easier to
 542  * grep for and to see them at a glance - while still having a
 543  * similar structure to the definitions in the spec.
 544  *
 545  * Here's how they are structured:
 546  *
 547  * GUID: 12345678-1234-1234-1234-123456789012
 548  * Spec:
 549  *      #define EFI_SOME_PROTOCOL_GUID \
 550  *        {0x12345678,0x1234,0x1234,\
 551  *          {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
 552  * Here:
 553  *      #define SOME_PROTOCOL_GUID              EFI_GUID(0x12345678, 0x1234, 0x1234,  0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
 554  *                                      ^ tabs                                      ^extra space
 555  *
 556  * Note that the 'extra space' separates the values at the same place
 557  * where the UEFI SPEC breaks the line.
 558  */
 559 #define NULL_GUID                               EFI_GUID(0x00000000, 0x0000, 0x0000,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
 560 #define MPS_TABLE_GUID                          EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 561 #define ACPI_TABLE_GUID                         EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 562 #define ACPI_20_TABLE_GUID                      EFI_GUID(0x8868e871, 0xe4f1, 0x11d3,  0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
 563 #define SMBIOS_TABLE_GUID                       EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 564 #define SMBIOS3_TABLE_GUID                      EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c,  0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
 565 #define SAL_SYSTEM_TABLE_GUID                   EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 566 #define HCDP_TABLE_GUID                         EFI_GUID(0xf951938d, 0x620b, 0x42ef,  0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
 567 #define UGA_IO_PROTOCOL_GUID                    EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b,  0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
 568 #define EFI_GLOBAL_VARIABLE_GUID                EFI_GUID(0x8be4df61, 0x93ca, 0x11d2,  0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
 569 #define UV_SYSTEM_TABLE_GUID                    EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd,  0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
 570 #define LINUX_EFI_CRASH_GUID                    EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc,  0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
 571 #define LOADED_IMAGE_PROTOCOL_GUID              EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2,  0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 572 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID       EFI_GUID(0x9042a9de, 0x23dc, 0x4a38,  0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
 573 #define EFI_UGA_PROTOCOL_GUID                   EFI_GUID(0x982c298b, 0xf4fa, 0x41cb,  0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
 574 #define EFI_PCI_IO_PROTOCOL_GUID                EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5,  0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
 575 #define EFI_FILE_INFO_ID                        EFI_GUID(0x09576e92, 0x6d3f, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 576 #define EFI_SYSTEM_RESOURCE_TABLE_GUID          EFI_GUID(0xb122a263, 0x3661, 0x4f68,  0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
 577 #define EFI_FILE_SYSTEM_GUID                    EFI_GUID(0x964e5b22, 0x6459, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
 578 #define DEVICE_TREE_GUID                        EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5,  0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
 579 #define EFI_PROPERTIES_TABLE_GUID               EFI_GUID(0x880aaca3, 0x4adc, 0x4a04,  0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
 580 #define EFI_RNG_PROTOCOL_GUID                   EFI_GUID(0x3152bca5, 0xeade, 0x433d,  0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
 581 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID        EFI_GUID(0xdcfa911d, 0x26eb, 0x469f,  0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
 582 #define EFI_CONSOLE_OUT_DEVICE_GUID             EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4,  0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
 583
 584 /*
 585  * This GUID is used to pass to the kernel proper the struct screen_info
 586  * structure that was populated by the stub based on the GOP protocol instance
 587  * associated with ConOut
 588  */
 589 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID    EFI_GUID(0xe03fc20a, 0x85dc, 0x406e,  0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
 590 #define LINUX_EFI_LOADER_ENTRY_GUID             EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf,  0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
 591
 592 typedef struct {
 593         efi_guid_t guid;
 594         u64 table;
 595 } efi_config_table_64_t;
 596
 597 typedef struct {
 598         efi_guid_t guid;
 599         u32 table;
 600 } efi_config_table_32_t;
 601
 602 typedef struct {
 603         efi_guid_t guid;
 604         unsigned long table;
 605 } efi_config_table_t;
 606
 607 typedef struct {
 608         efi_guid_t guid;
 609         const char *name;
 610         unsigned long *ptr;
 611 } efi_config_table_type_t;
 612
 613 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 614
 615 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
 616 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
 617 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
 618 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
 619 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
 620 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
 621
 622 typedef struct {
 623         efi_table_hdr_t hdr;
 624         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
 625         u32 fw_revision;
 626         u32 __pad1;
 627         u64 con_in_handle;
 628         u64 con_in;
 629         u64 con_out_handle;
 630         u64 con_out;
 631         u64 stderr_handle;
 632         u64 stderr;
 633         u64 runtime;
 634         u64 boottime;
 635         u32 nr_tables;
 636         u32 __pad2;
 637         u64 tables;
 638 } efi_system_table_64_t;
 639
 640 typedef struct {
 641         efi_table_hdr_t hdr;
 642         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
 643         u32 fw_revision;
 644         u32 con_in_handle;
 645         u32 con_in;
 646         u32 con_out_handle;
 647         u32 con_out;
 648         u32 stderr_handle;
 649         u32 stderr;
 650         u32 runtime;
 651         u32 boottime;
 652         u32 nr_tables;
 653         u32 tables;
 654 } efi_system_table_32_t;
 655
 656 typedef struct {
 657         efi_table_hdr_t hdr;
 658         unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 659         u32 fw_revision;
 660         unsigned long con_in_handle;
 661         unsigned long con_in;
 662         unsigned long con_out_handle;
 663         unsigned long con_out;
 664         unsigned long stderr_handle;
 665         unsigned long stderr;
 666         efi_runtime_services_t *runtime;
 667         efi_boot_services_t *boottime;
 668         unsigned long nr_tables;
 669         unsigned long tables;
 670 } efi_system_table_t;
 671
 672 struct efi_memory_map {
 673         phys_addr_t phys_map;
 674         void *map;
 675         void *map_end;
 676         int nr_map;
 677         unsigned long desc_version;
 678         unsigned long desc_size;
 679 };
 680
 681 struct efi_fdt_params {
 682         u64 system_table;
 683         u64 mmap;
 684         u32 mmap_size;
 685         u32 desc_size;
 686         u32 desc_ver;
 687 };
 688
 689 typedef struct {
 690         u32 revision;
 691         u32 parent_handle;
 692         u32 system_table;
 693         u32 device_handle;
 694         u32 file_path;
 695         u32 reserved;
 696         u32 load_options_size;
 697         u32 load_options;
 698         u32 image_base;
 699         __aligned_u64 image_size;
 700         unsigned int image_code_type;
 701         unsigned int image_data_type;
 702         unsigned long unload;
 703 } efi_loaded_image_32_t;
 704
 705 typedef struct {
 706         u32 revision;
 707         u64 parent_handle;
 708         u64 system_table;
 709         u64 device_handle;
 710         u64 file_path;
 711         u64 reserved;
 712         u32 load_options_size;
 713         u64 load_options;
 714         u64 image_base;
 715         __aligned_u64 image_size;
 716         unsigned int image_code_type;
 717         unsigned int image_data_type;
 718         unsigned long unload;
 719 } efi_loaded_image_64_t;
 720
 721 typedef struct {
 722         u32 revision;
 723         void *parent_handle;
 724         efi_system_table_t *system_table;
 725         void *device_handle;
 726         void *file_path;
 727         void *reserved;
 728         u32 load_options_size;
 729         void *load_options;
 730         void *image_base;
 731         __aligned_u64 image_size;
 732         unsigned int image_code_type;
 733         unsigned int image_data_type;
 734         unsigned long unload;
 735 } efi_loaded_image_t;
 736
 737
 738 typedef struct {
 739         u64 size;
 740         u64 file_size;
 741         u64 phys_size;
 742         efi_time_t create_time;
 743         efi_time_t last_access_time;
 744         efi_time_t modification_time;
 745         __aligned_u64 attribute;
 746         efi_char16_t filename[1];
 747 } efi_file_info_t;
 748
 749 typedef struct {
 750         u64 revision;
 751         u32 open;
 752         u32 close;
 753         u32 delete;
 754         u32 read;
 755         u32 write;
 756         u32 get_position;
 757         u32 set_position;
 758         u32 get_info;
 759         u32 set_info;
 760         u32 flush;
 761 } efi_file_handle_32_t;
 762
 763 typedef struct {
 764         u64 revision;
 765         u64 open;
 766         u64 close;
 767         u64 delete;
 768         u64 read;
 769         u64 write;
 770         u64 get_position;
 771         u64 set_position;
 772         u64 get_info;
 773         u64 set_info;
 774         u64 flush;
 775 } efi_file_handle_64_t;
 776
 777 typedef struct _efi_file_handle {
 778         u64 revision;
 779         efi_status_t (*open)(struct _efi_file_handle *,
 780                              struct _efi_file_handle **,
 781                              efi_char16_t *, u64, u64);
 782         efi_status_t (*close)(struct _efi_file_handle *);
 783         void *delete;
 784         efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
 785                              void *);
 786         void *write;
 787         void *get_position;
 788         void *set_position;
 789         efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
 790                         unsigned long *, void *);
 791         void *set_info;
 792         void *flush;
 793 } efi_file_handle_t;
 794
 795 typedef struct _efi_file_io_interface {
 796         u64 revision;
 797         int (*open_volume)(struct _efi_file_io_interface *,
 798                            efi_file_handle_t **);
 799 } efi_file_io_interface_t;
 800
 801 #define EFI_FILE_MODE_READ      0x0000000000000001
 802 #define EFI_FILE_MODE_WRITE     0x0000000000000002
 803 #define EFI_FILE_MODE_CREATE    0x8000000000000000
 804
 805 typedef struct {
 806         u32 version;
 807         u32 length;
 808         u64 memory_protection_attribute;
 809 } efi_properties_table_t;
 810
 811 #define EFI_PROPERTIES_TABLE_VERSION    0x00010000
 812 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
 813
 814 #define EFI_INVALID_TABLE_ADDR          (~0UL)
 815
 816 typedef struct {
 817         u32 version;
 818         u32 num_entries;
 819         u32 desc_size;
 820         u32 reserved;
 821         efi_memory_desc_t entry[0];
 822 } efi_memory_attributes_table_t;
 823
 824 /*
 825  * All runtime access to EFI goes through this structure:
 826  */
 827 extern struct efi {
 828         efi_system_table_t *systab;     /* EFI system table */
 829         unsigned int runtime_version;   /* Runtime services version */
 830         unsigned long mps;              /* MPS table */
 831         unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
 832         unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
 833         unsigned long smbios;           /* SMBIOS table (32 bit entry point) */
 834         unsigned long smbios3;          /* SMBIOS table (64 bit entry point) */
 835         unsigned long sal_systab;       /* SAL system table */
 836         unsigned long boot_info;        /* boot info table */
 837         unsigned long hcdp;             /* HCDP table */
 838         unsigned long uga;              /* UGA table */
 839         unsigned long uv_systab;        /* UV system table */
 840         unsigned long fw_vendor;        /* fw_vendor */
 841         unsigned long runtime;          /* runtime table */
 842         unsigned long config_table;     /* config tables */
 843         unsigned long esrt;             /* ESRT table */
 844         unsigned long properties_table; /* properties table */
 845         unsigned long mem_attr_table;   /* memory attributes table */
 846         efi_get_time_t *get_time;
 847         efi_set_time_t *set_time;
 848         efi_get_wakeup_time_t *get_wakeup_time;
 849         efi_set_wakeup_time_t *set_wakeup_time;
 850         efi_get_variable_t *get_variable;
 851         efi_get_next_variable_t *get_next_variable;
 852         efi_set_variable_t *set_variable;
 853         efi_set_variable_t *set_variable_nonblocking;
 854         efi_query_variable_info_t *query_variable_info;
 855         efi_query_variable_info_t *query_variable_info_nonblocking;
 856         efi_update_capsule_t *update_capsule;
 857         efi_query_capsule_caps_t *query_capsule_caps;
 858         efi_get_next_high_mono_count_t *get_next_high_mono_count;
 859         efi_reset_system_t *reset_system;
 860         efi_set_virtual_address_map_t *set_virtual_address_map;
 861         struct efi_memory_map memmap;
 862         unsigned long flags;
 863 } efi;
 864
 865 static inline int
 866 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 867 {
 868         return memcmp(&left, &right, sizeof (efi_guid_t));
 869 }
 870
 871 static inline char *
 872 efi_guid_to_str(efi_guid_t *guid, char *out)
 873 {
 874         sprintf(out, "%pUl", guid->b);
 875         return out;
 876 }
 877
 878 extern void efi_init (void);
 879 extern void *efi_get_pal_addr (void);
 880 extern void efi_map_pal_code (void);
 881 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 882 extern void efi_gettimeofday (struct timespec64 *ts);
 883 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 884 #ifdef CONFIG_X86
 885 extern void efi_late_init(void);
 886 extern void efi_free_boot_services(void);
 887 extern efi_status_t efi_query_variable_store(u32 attributes,
 888                                              unsigned long size,
 889                                              bool nonblocking);
 890 extern void efi_find_mirror(void);
 891 #else
 892 static inline void efi_late_init(void) {}
 893 static inline void efi_free_boot_services(void) {}
 894
 895 static inline efi_status_t efi_query_variable_store(u32 attributes,
 896                                                     unsigned long size,
 897                                                     bool nonblocking)
 898 {
 899         return EFI_SUCCESS;
 900 }
 901 #endif
 902 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
 903 extern int efi_config_init(efi_config_table_type_t *arch_tables);
 904 #ifdef CONFIG_EFI_ESRT
 905 extern void __init efi_esrt_init(void);
 906 #else
 907 static inline void efi_esrt_init(void) { }
 908 #endif
 909 extern int efi_config_parse_tables(void *config_tables, int count, int sz,
 910                                    efi_config_table_type_t *arch_tables);
 911 extern u64 efi_get_iobase (void);
 912 extern u32 efi_mem_type (unsigned long phys_addr);
 913 extern u64 efi_mem_attributes (unsigned long phys_addr);
 914 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 915 extern int __init efi_uart_console_only (void);
 916 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
 917 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 918 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 919                 struct resource *data_resource, struct resource *bss_resource);
 920 extern void efi_reserve_boot_services(void);
 921 extern int efi_get_fdt_params(struct efi_fdt_params *params);
 922 extern struct kobject *efi_kobj;
 923
 924 extern int efi_reboot_quirk_mode;
 925 extern bool efi_poweroff_required(void);
 926
 927 #ifdef CONFIG_EFI_FAKE_MEMMAP
 928 extern void __init efi_fake_memmap(void);
 929 #else
 930 static inline void efi_fake_memmap(void) { }
 931 #endif
 932
 933 /*
 934  * efi_memattr_perm_setter - arch specific callback function passed into
 935  *                           efi_memattr_apply_permissions() that updates the
 936  *                           mapping permissions described by the second
 937  *                           argument in the page tables referred to by the
 938  *                           first argument.
 939  */
 940 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
 941
 942 extern int efi_memattr_init(void);
 943 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
 944                                          efi_memattr_perm_setter fn);
 945
 946 /* Iterate through an efi_memory_map */
 947 #define for_each_efi_memory_desc_in_map(m, md)                             \
 948         for ((md) = (m)->map;                                              \
 949              ((void *)(md) + (m)->desc_size) <= (m)->map_end;              \
 950              (md) = (void *)(md) + (m)->desc_size)
 951
 952 /**
 953  * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
 954  * @md: the efi_memory_desc_t * iterator
 955  *
 956  * Once the loop finishes @md must not be accessed.
 957  */
 958 #define for_each_efi_memory_desc(md) \
 959         for_each_efi_memory_desc_in_map(&efi.memmap, md)
 960
 961 /*
 962  * Format an EFI memory descriptor's type and attributes to a user-provided
 963  * character buffer, as per snprintf(), and return the buffer.
 964  */
 965 char * __init efi_md_typeattr_format(char *buf, size_t size,
 966                                      const efi_memory_desc_t *md);
 967
 968 /**
 969  * efi_range_is_wc - check the WC bit on an address range
 970  * @start: starting kvirt address
 971  * @len: length of range
 972  *
 973  * Consult the EFI memory map and make sure it's ok to set this range WC.
 974  * Returns true or false.
 975  */
 976 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 977 {
 978         unsigned long i;
 979
 980         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 981                 unsigned long paddr = __pa(start + i);
 982                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 983                         return 0;
 984         }
 985         /* The range checked out */
 986         return 1;
 987 }
 988
 989 #ifdef CONFIG_EFI_PCDP
 990 extern int __init efi_setup_pcdp_console(char *);
 991 #endif
 992
 993 /*
 994  * We play games with efi_enabled so that the compiler will, if
 995  * possible, remove EFI-related code altogether.
 996  */
 997 #define EFI_BOOT                0       /* Were we booted from EFI? */
 998 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
 999 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
1000 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
1001 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
1002 #define EFI_PARAVIRT            6       /* Access is via a paravirt interface */
1003 #define EFI_ARCH_1              7       /* First arch-specific bit */
1004 #define EFI_DBG                 8       /* Print additional debug info at runtime */
1005 #define EFI_NX_PE_DATA          9       /* Can runtime data regions be mapped non-executable? */
1006
1007 #ifdef CONFIG_EFI
1008 /*
1009  * Test whether the above EFI_* bits are enabled.
1010  */
1011 static inline bool efi_enabled(int feature)
1012 {
1013         return test_bit(feature, &efi.flags) != 0;
1014 }
1015 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1016 #else
1017 static inline bool efi_enabled(int feature)
1018 {
1019         return false;
1020 }
1021 static inline void
1022 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1023
1024 static inline bool
1025 efi_capsule_pending(int *reset_type)
1026 {
1027         return false;
1028 }
1029 #endif
1030
1031 extern int efi_status_to_err(efi_status_t status);
1032
1033 /*
1034  * Variable Attributes
1035  */
1036 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
1037 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1038 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
1039 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1040 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1041 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1042 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
1043
1044 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
1045                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1046                                 EFI_VARIABLE_RUNTIME_ACCESS | \
1047                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1048                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1049                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1050                                 EFI_VARIABLE_APPEND_WRITE)
1051 /*
1052  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1053  * not including trailing NUL
1054  */
1055 #define EFI_VARIABLE_GUID_LEN   UUID_STRING_LEN
1056
1057 /*
1058  * The type of search to perform when calling boottime->locate_handle
1059  */
1060 #define EFI_LOCATE_ALL_HANDLES                  0
1061 #define EFI_LOCATE_BY_REGISTER_NOTIFY           1
1062 #define EFI_LOCATE_BY_PROTOCOL                  2
1063
1064 /*
1065  * EFI Device Path information
1066  */
1067 #define EFI_DEV_HW                      0x01
1068 #define  EFI_DEV_PCI                             1
1069 #define  EFI_DEV_PCCARD                          2
1070 #define  EFI_DEV_MEM_MAPPED                      3
1071 #define  EFI_DEV_VENDOR                          4
1072 #define  EFI_DEV_CONTROLLER                      5
1073 #define EFI_DEV_ACPI                    0x02
1074 #define   EFI_DEV_BASIC_ACPI                     1
1075 #define   EFI_DEV_EXPANDED_ACPI                  2
1076 #define EFI_DEV_MSG                     0x03
1077 #define   EFI_DEV_MSG_ATAPI                      1
1078 #define   EFI_DEV_MSG_SCSI                       2
1079 #define   EFI_DEV_MSG_FC                         3
1080 #define   EFI_DEV_MSG_1394                       4
1081 #define   EFI_DEV_MSG_USB                        5
1082 #define   EFI_DEV_MSG_USB_CLASS                 15
1083 #define   EFI_DEV_MSG_I20                        6
1084 #define   EFI_DEV_MSG_MAC                       11
1085 #define   EFI_DEV_MSG_IPV4                      12
1086 #define   EFI_DEV_MSG_IPV6                      13
1087 #define   EFI_DEV_MSG_INFINIBAND                 9
1088 #define   EFI_DEV_MSG_UART                      14
1089 #define   EFI_DEV_MSG_VENDOR                    10
1090 #define EFI_DEV_MEDIA                   0x04
1091 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
1092 #define   EFI_DEV_MEDIA_CDROM                    2
1093 #define   EFI_DEV_MEDIA_VENDOR                   3
1094 #define   EFI_DEV_MEDIA_FILE                     4
1095 #define   EFI_DEV_MEDIA_PROTOCOL                 5
1096 #define EFI_DEV_BIOS_BOOT               0x05
1097 #define EFI_DEV_END_PATH                0x7F
1098 #define EFI_DEV_END_PATH2               0xFF
1099 #define   EFI_DEV_END_INSTANCE                  0x01
1100 #define   EFI_DEV_END_ENTIRE                    0xFF
1101
1102 struct efi_generic_dev_path {
1103         u8 type;
1104         u8 sub_type;
1105         u16 length;
1106 } __attribute ((packed));
1107
1108 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1109 {
1110         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1111         *addr &= PAGE_MASK;
1112 }
1113
1114 /*
1115  * EFI Variable support.
1116  *
1117  * Different firmware drivers can expose their EFI-like variables using
1118  * the following.
1119  */
1120
1121 struct efivar_operations {
1122         efi_get_variable_t *get_variable;
1123         efi_get_next_variable_t *get_next_variable;
1124         efi_set_variable_t *set_variable;
1125         efi_set_variable_t *set_variable_nonblocking;
1126         efi_query_variable_store_t *query_variable_store;
1127 };
1128
1129 struct efivars {
1130         /*
1131          * ->lock protects two things:
1132          * 1) efivarfs_list and efivars_sysfs_list
1133          * 2) ->ops calls
1134          */
1135         spinlock_t lock;
1136         struct kset *kset;
1137         struct kobject *kobject;
1138         const struct efivar_operations *ops;
1139 };
1140
1141 /*
1142  * The maximum size of VariableName + Data = 1024
1143  * Therefore, it's reasonable to save that much
1144  * space in each part of the structure,
1145  * and we use a page for reading/writing.
1146  */
1147
1148 #define EFI_VAR_NAME_LEN        1024
1149
1150 struct efi_variable {
1151         efi_char16_t  VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1152         efi_guid_t    VendorGuid;
1153         unsigned long DataSize;
1154         __u8          Data[1024];
1155         efi_status_t  Status;
1156         __u32         Attributes;
1157 } __attribute__((packed));
1158
1159 struct efivar_entry {
1160         struct efi_variable var;
1161         struct list_head list;
1162         struct kobject kobj;
1163         bool scanning;
1164         bool deleting;
1165 };
1166
1167 struct efi_simple_text_output_protocol_32 {
1168         u32 reset;
1169         u32 output_string;
1170         u32 test_string;
1171 };
1172
1173 struct efi_simple_text_output_protocol_64 {
1174         u64 reset;
1175         u64 output_string;
1176         u64 test_string;
1177 };
1178
1179 struct efi_simple_text_output_protocol {
1180         void *reset;
1181         efi_status_t (*output_string)(void *, void *);
1182         void *test_string;
1183 };
1184
1185 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR               0
1186 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR               1
1187 #define PIXEL_BIT_MASK                                  2
1188 #define PIXEL_BLT_ONLY                                  3
1189 #define PIXEL_FORMAT_MAX                                4
1190
1191 struct efi_pixel_bitmask {
1192         u32 red_mask;
1193         u32 green_mask;
1194         u32 blue_mask;
1195         u32 reserved_mask;
1196 };
1197
1198 struct efi_graphics_output_mode_info {
1199         u32 version;
1200         u32 horizontal_resolution;
1201         u32 vertical_resolution;
1202         int pixel_format;
1203         struct efi_pixel_bitmask pixel_information;
1204         u32 pixels_per_scan_line;
1205 } __packed;
1206
1207 struct efi_graphics_output_protocol_mode_32 {
1208         u32 max_mode;
1209         u32 mode;
1210         u32 info;
1211         u32 size_of_info;
1212         u64 frame_buffer_base;
1213         u32 frame_buffer_size;
1214 } __packed;
1215
1216 struct efi_graphics_output_protocol_mode_64 {
1217         u32 max_mode;
1218         u32 mode;
1219         u64 info;
1220         u64 size_of_info;
1221         u64 frame_buffer_base;
1222         u64 frame_buffer_size;
1223 } __packed;
1224
1225 struct efi_graphics_output_protocol_mode {
1226         u32 max_mode;
1227         u32 mode;
1228         unsigned long info;
1229         unsigned long size_of_info;
1230         u64 frame_buffer_base;
1231         unsigned long frame_buffer_size;
1232 } __packed;
1233
1234 struct efi_graphics_output_protocol_32 {
1235         u32 query_mode;
1236         u32 set_mode;
1237         u32 blt;
1238         u32 mode;
1239 };
1240
1241 struct efi_graphics_output_protocol_64 {
1242         u64 query_mode;
1243         u64 set_mode;
1244         u64 blt;
1245         u64 mode;
1246 };
1247
1248 struct efi_graphics_output_protocol {
1249         unsigned long query_mode;
1250         unsigned long set_mode;
1251         unsigned long blt;
1252         struct efi_graphics_output_protocol_mode *mode;
1253 };
1254
1255 typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
1256         struct efi_graphics_output_protocol *, u32, unsigned long *,
1257         struct efi_graphics_output_mode_info **);
1258
1259 extern struct list_head efivar_sysfs_list;
1260
1261 static inline void
1262 efivar_unregister(struct efivar_entry *var)
1263 {
1264         kobject_put(&var->kobj);
1265 }
1266
1267 int efivars_register(struct efivars *efivars,
1268                      const struct efivar_operations *ops,
1269                      struct kobject *kobject);
1270 int efivars_unregister(struct efivars *efivars);
1271 struct kobject *efivars_kobject(void);
1272
1273 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1274                 void *data, bool duplicates, struct list_head *head);
1275
1276 void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1277 void efivar_entry_remove(struct efivar_entry *entry);
1278
1279 int __efivar_entry_delete(struct efivar_entry *entry);
1280 int efivar_entry_delete(struct efivar_entry *entry);
1281
1282 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1283 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1284                        unsigned long *size, void *data);
1285 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1286                      unsigned long *size, void *data);
1287 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1288                      unsigned long size, void *data, struct list_head *head);
1289 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1290                               unsigned long *size, void *data, bool *set);
1291 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1292                           bool block, unsigned long size, void *data);
1293
1294 void efivar_entry_iter_begin(void);
1295 void efivar_entry_iter_end(void);
1296
1297 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1298                         struct list_head *head, void *data,
1299                         struct efivar_entry **prev);
1300 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1301                       struct list_head *head, void *data);
1302
1303 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1304                                        struct list_head *head, bool remove);
1305
1306 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1307                      unsigned long data_size);
1308 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1309                                   size_t len);
1310
1311 extern struct work_struct efivar_work;
1312 void efivar_run_worker(void);
1313
1314 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1315 int efivars_sysfs_init(void);
1316
1317 #define EFIVARS_DATA_SIZE_MAX 1024
1318
1319 #endif /* CONFIG_EFI_VARS */
1320 extern bool efi_capsule_pending(int *reset_type);
1321
1322 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1323                                  size_t size, int *reset);
1324
1325 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1326                               struct page **pages);
1327
1328 #ifdef CONFIG_EFI_RUNTIME_MAP
1329 int efi_runtime_map_init(struct kobject *);
1330 void efi_runtime_map_setup(void *, int, u32);
1331 int efi_get_runtime_map_size(void);
1332 int efi_get_runtime_map_desc_size(void);
1333 int efi_runtime_map_copy(void *buf, size_t bufsz);
1334 #else
1335 static inline int efi_runtime_map_init(struct kobject *kobj)
1336 {
1337         return 0;
1338 }
1339
1340 static inline void
1341 efi_runtime_map_setup(void *map, int nr_entries, u32 desc_size) {}
1342
1343 static inline int efi_get_runtime_map_size(void)
1344 {
1345         return 0;
1346 }
1347
1348 static inline int efi_get_runtime_map_desc_size(void)
1349 {
1350         return 0;
1351 }
1352
1353 static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1354 {
1355         return 0;
1356 }
1357
1358 #endif
1359
1360 /* prototypes shared between arch specific and generic stub code */
1361
1362 #define pr_efi(sys_table, msg)     efi_printk(sys_table, "EFI stub: "msg)
1363 #define pr_efi_err(sys_table, msg) efi_printk(sys_table, "EFI stub: ERROR: "msg)
1364
1365 void efi_printk(efi_system_table_t *sys_table_arg, char *str);
1366
1367 void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
1368               unsigned long addr);
1369
1370 char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
1371                           efi_loaded_image_t *image, int *cmd_line_len);
1372
1373 efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
1374                                 efi_memory_desc_t **map,
1375                                 unsigned long *map_size,
1376                                 unsigned long *desc_size,
1377                                 u32 *desc_ver,
1378                                 unsigned long *key_ptr);
1379
1380 efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
1381                            unsigned long size, unsigned long align,
1382                            unsigned long *addr);
1383
1384 efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
1385                             unsigned long size, unsigned long align,
1386                             unsigned long *addr, unsigned long max);
1387
1388 efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
1389                                  unsigned long *image_addr,
1390                                  unsigned long image_size,
1391                                  unsigned long alloc_size,
1392                                  unsigned long preferred_addr,
1393                                  unsigned long alignment);
1394
1395 efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
1396                                   efi_loaded_image_t *image,
1397                                   char *cmd_line, char *option_string,
1398                                   unsigned long max_addr,
1399                                   unsigned long *load_addr,
1400                                   unsigned long *load_size);
1401
1402 efi_status_t efi_parse_options(char *cmdline);
1403
1404 efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
1405                            struct screen_info *si, efi_guid_t *proto,
1406                            unsigned long size);
1407
1408 bool efi_runtime_disabled(void);
1409 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1410
1411 /*
1412  * Arch code can implement the following three template macros, avoiding
1413  * reptition for the void/non-void return cases of {__,}efi_call_virt():
1414  *
1415  *  * arch_efi_call_virt_setup()
1416  *
1417  *    Sets up the environment for the call (e.g. switching page tables,
1418  *    allowing kernel-mode use of floating point, if required).
1419  *
1420  *  * arch_efi_call_virt()
1421  *
1422  *    Performs the call. The last expression in the macro must be the call
1423  *    itself, allowing the logic to be shared by the void and non-void
1424  *    cases.
1425  *
1426  *  * arch_efi_call_virt_teardown()
1427  *
1428  *    Restores the usual kernel environment once the call has returned.
1429  */
1430
1431 #define efi_call_virt_pointer(p, f, args...)                            \
1432 ({                                                                      \
1433         efi_status_t __s;                                               \
1434         unsigned long __flags;                                          \
1435                                                                         \
1436         arch_efi_call_virt_setup();                                     \
1437                                                                         \
1438         local_save_flags(__flags);                                      \
1439         __s = arch_efi_call_virt(p, f, args);                           \
1440         efi_call_virt_check_flags(__flags, __stringify(f));             \
1441                                                                         \
1442         arch_efi_call_virt_teardown();                                  \
1443                                                                         \
1444         __s;                                                            \
1445 })
1446
1447 #define __efi_call_virt_pointer(p, f, args...)                          \
1448 ({                                                                      \
1449         unsigned long __flags;                                          \
1450                                                                         \
1451         arch_efi_call_virt_setup();                                     \
1452                                                                         \
1453         local_save_flags(__flags);                                      \
1454         arch_efi_call_virt(p, f, args);                                 \
1455         efi_call_virt_check_flags(__flags, __stringify(f));             \
1456                                                                         \
1457         arch_efi_call_virt_teardown();                                  \
1458 })
1459
1460 #endif /* _LINUX_EFI_H */