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1#ifndef _LINUX_EFI_H
2#define _LINUX_EFI_H
3
4/*
5 * Extensible Firmware Interface
6 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
7 *
8 * Copyright (C) 1999 VA Linux Systems
9 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
10 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
11 * David Mosberger-Tang <davidm@hpl.hp.com>
12 * Stephane Eranian <eranian@hpl.hp.com>
13 */
14#include <linux/init.h>
15#include <linux/string.h>
16#include <linux/time.h>
17#include <linux/types.h>
18#include <linux/proc_fs.h>
19#include <linux/rtc.h>
20#include <linux/ioport.h>
21#include <linux/pfn.h>
22#include <linux/pstore.h>
23
24#include <asm/page.h>
25
26#define EFI_SUCCESS 0
27#define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))
28#define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1)))
29#define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1)))
30#define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))
31#define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1)))
32#define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1)))
33#define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1)))
34#define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1)))
35#define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1)))
36#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
37#define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
38
39typedef unsigned long efi_status_t;
40typedef u8 efi_bool_t;
41typedef u16 efi_char16_t; /* UNICODE character */
42
43
44typedef struct {
45 u8 b[16];
46} efi_guid_t;
47
48#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
49((efi_guid_t) \
50{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
51 (b) & 0xff, ((b) >> 8) & 0xff, \
52 (c) & 0xff, ((c) >> 8) & 0xff, \
53 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
54
55/*
56 * Generic EFI table header
57 */
58typedef struct {
59 u64 signature;
60 u32 revision;
61 u32 headersize;
62 u32 crc32;
63 u32 reserved;
64} efi_table_hdr_t;
65
66/*
67 * Memory map descriptor:
68 */
69
70/* Memory types: */
71#define EFI_RESERVED_TYPE 0
72#define EFI_LOADER_CODE 1
73#define EFI_LOADER_DATA 2
74#define EFI_BOOT_SERVICES_CODE 3
75#define EFI_BOOT_SERVICES_DATA 4
76#define EFI_RUNTIME_SERVICES_CODE 5
77#define EFI_RUNTIME_SERVICES_DATA 6
78#define EFI_CONVENTIONAL_MEMORY 7
79#define EFI_UNUSABLE_MEMORY 8
80#define EFI_ACPI_RECLAIM_MEMORY 9
81#define EFI_ACPI_MEMORY_NVS 10
82#define EFI_MEMORY_MAPPED_IO 11
83#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
84#define EFI_PAL_CODE 13
85#define EFI_MAX_MEMORY_TYPE 14
86
87/* Attribute values: */
88#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
89#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
90#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
91#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
92#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
93#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
94#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
95#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
96#define EFI_MEMORY_DESCRIPTOR_VERSION 1
97
98#define EFI_PAGE_SHIFT 12
99
100typedef struct {
101 u32 type;
102 u32 pad;
103 u64 phys_addr;
104 u64 virt_addr;
105 u64 num_pages;
106 u64 attribute;
107} efi_memory_desc_t;
108
109typedef struct {
110 efi_guid_t guid;
111 u32 headersize;
112 u32 flags;
113 u32 imagesize;
114} efi_capsule_header_t;
115
116/*
117 * Allocation types for calls to boottime->allocate_pages.
118 */
119#define EFI_ALLOCATE_ANY_PAGES 0
120#define EFI_ALLOCATE_MAX_ADDRESS 1
121#define EFI_ALLOCATE_ADDRESS 2
122#define EFI_MAX_ALLOCATE_TYPE 3
123
124typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
125
126/*
127 * Types and defines for Time Services
128 */
129#define EFI_TIME_ADJUST_DAYLIGHT 0x1
130#define EFI_TIME_IN_DAYLIGHT 0x2
131#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
132
133typedef struct {
134 u16 year;
135 u8 month;
136 u8 day;
137 u8 hour;
138 u8 minute;
139 u8 second;
140 u8 pad1;
141 u32 nanosecond;
142 s16 timezone;
143 u8 daylight;
144 u8 pad2;
145} efi_time_t;
146
147typedef struct {
148 u32 resolution;
149 u32 accuracy;
150 u8 sets_to_zero;
151} efi_time_cap_t;
152
153/*
154 * EFI Boot Services table
155 */
156typedef struct {
157 efi_table_hdr_t hdr;
158 void *raise_tpl;
159 void *restore_tpl;
160 void *allocate_pages;
161 void *free_pages;
162 void *get_memory_map;
163 void *allocate_pool;
164 void *free_pool;
165 void *create_event;
166 void *set_timer;
167 void *wait_for_event;
168 void *signal_event;
169 void *close_event;
170 void *check_event;
171 void *install_protocol_interface;
172 void *reinstall_protocol_interface;
173 void *uninstall_protocol_interface;
174 void *handle_protocol;
175 void *__reserved;
176 void *register_protocol_notify;
177 void *locate_handle;
178 void *locate_device_path;
179 void *install_configuration_table;
180 void *load_image;
181 void *start_image;
182 void *exit;
183 void *unload_image;
184 void *exit_boot_services;
185 void *get_next_monotonic_count;
186 void *stall;
187 void *set_watchdog_timer;
188 void *connect_controller;
189 void *disconnect_controller;
190 void *open_protocol;
191 void *close_protocol;
192 void *open_protocol_information;
193 void *protocols_per_handle;
194 void *locate_handle_buffer;
195 void *locate_protocol;
196 void *install_multiple_protocol_interfaces;
197 void *uninstall_multiple_protocol_interfaces;
198 void *calculate_crc32;
199 void *copy_mem;
200 void *set_mem;
201 void *create_event_ex;
202} efi_boot_services_t;
203
204typedef enum {
205 EfiPciIoWidthUint8,
206 EfiPciIoWidthUint16,
207 EfiPciIoWidthUint32,
208 EfiPciIoWidthUint64,
209 EfiPciIoWidthFifoUint8,
210 EfiPciIoWidthFifoUint16,
211 EfiPciIoWidthFifoUint32,
212 EfiPciIoWidthFifoUint64,
213 EfiPciIoWidthFillUint8,
214 EfiPciIoWidthFillUint16,
215 EfiPciIoWidthFillUint32,
216 EfiPciIoWidthFillUint64,
217 EfiPciIoWidthMaximum
218} EFI_PCI_IO_PROTOCOL_WIDTH;
219
220typedef enum {
221 EfiPciIoAttributeOperationGet,
222 EfiPciIoAttributeOperationSet,
223 EfiPciIoAttributeOperationEnable,
224 EfiPciIoAttributeOperationDisable,
225 EfiPciIoAttributeOperationSupported,
226 EfiPciIoAttributeOperationMaximum
227} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
228
229
230typedef struct {
231 void *read;
232 void *write;
233} efi_pci_io_protocol_access_t;
234
235typedef struct {
236 void *poll_mem;
237 void *poll_io;
238 efi_pci_io_protocol_access_t mem;
239 efi_pci_io_protocol_access_t io;
240 efi_pci_io_protocol_access_t pci;
241 void *copy_mem;
242 void *map;
243 void *unmap;
244 void *allocate_buffer;
245 void *free_buffer;
246 void *flush;
247 void *get_location;
248 void *attributes;
249 void *get_bar_attributes;
250 void *set_bar_attributes;
251 uint64_t romsize;
252 void *romimage;
253} efi_pci_io_protocol;
254
255#define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
256#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
257#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
258#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
259#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
260#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
261#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
262#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
263#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
264#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
265#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
266#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
267#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
268#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
269#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
270#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
271#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
272#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
273#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
274
275/*
276 * Types and defines for EFI ResetSystem
277 */
278#define EFI_RESET_COLD 0
279#define EFI_RESET_WARM 1
280#define EFI_RESET_SHUTDOWN 2
281
282/*
283 * EFI Runtime Services table
284 */
285#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
286#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
287
288typedef struct {
289 efi_table_hdr_t hdr;
290 unsigned long get_time;
291 unsigned long set_time;
292 unsigned long get_wakeup_time;
293 unsigned long set_wakeup_time;
294 unsigned long set_virtual_address_map;
295 unsigned long convert_pointer;
296 unsigned long get_variable;
297 unsigned long get_next_variable;
298 unsigned long set_variable;
299 unsigned long get_next_high_mono_count;
300 unsigned long reset_system;
301 unsigned long update_capsule;
302 unsigned long query_capsule_caps;
303 unsigned long query_variable_info;
304} efi_runtime_services_t;
305
306typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
307typedef efi_status_t efi_set_time_t (efi_time_t *tm);
308typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
309 efi_time_t *tm);
310typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
311typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
312 unsigned long *data_size, void *data);
313typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
314 efi_guid_t *vendor);
315typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
316 u32 attr, unsigned long data_size,
317 void *data);
318typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
319typedef void efi_reset_system_t (int reset_type, efi_status_t status,
320 unsigned long data_size, efi_char16_t *data);
321typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
322 unsigned long descriptor_size,
323 u32 descriptor_version,
324 efi_memory_desc_t *virtual_map);
325typedef efi_status_t efi_query_variable_info_t(u32 attr,
326 u64 *storage_space,
327 u64 *remaining_space,
328 u64 *max_variable_size);
329typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
330 unsigned long count,
331 unsigned long sg_list);
332typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
333 unsigned long count,
334 u64 *max_size,
335 int *reset_type);
336
337/*
338 * EFI Configuration Table and GUID definitions
339 */
340#define NULL_GUID \
341 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
342
343#define MPS_TABLE_GUID \
344 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
345
346#define ACPI_TABLE_GUID \
347 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
348
349#define ACPI_20_TABLE_GUID \
350 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
351
352#define SMBIOS_TABLE_GUID \
353 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
354
355#define SAL_SYSTEM_TABLE_GUID \
356 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
357
358#define HCDP_TABLE_GUID \
359 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
360
361#define UGA_IO_PROTOCOL_GUID \
362 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
363
364#define EFI_GLOBAL_VARIABLE_GUID \
365 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
366
367#define UV_SYSTEM_TABLE_GUID \
368 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
369
370#define LINUX_EFI_CRASH_GUID \
371 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
372
373#define LOADED_IMAGE_PROTOCOL_GUID \
374 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
375
376#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
377 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
378
379#define EFI_UGA_PROTOCOL_GUID \
380 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
381
382#define EFI_PCI_IO_PROTOCOL_GUID \
383 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
384
385#define EFI_FILE_INFO_ID \
386 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
387
388#define EFI_FILE_SYSTEM_GUID \
389 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
390
391typedef struct {
392 efi_guid_t guid;
393 u64 table;
394} efi_config_table_64_t;
395
396typedef struct {
397 efi_guid_t guid;
398 u32 table;
399} efi_config_table_32_t;
400
401typedef struct {
402 efi_guid_t guid;
403 unsigned long table;
404} efi_config_table_t;
405
406#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
407
408#define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
409#define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
410#define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
411#define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
412#define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
413#define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
414
415typedef struct {
416 efi_table_hdr_t hdr;
417 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
418 u32 fw_revision;
419 u32 __pad1;
420 u64 con_in_handle;
421 u64 con_in;
422 u64 con_out_handle;
423 u64 con_out;
424 u64 stderr_handle;
425 u64 stderr;
426 u64 runtime;
427 u64 boottime;
428 u32 nr_tables;
429 u32 __pad2;
430 u64 tables;
431} efi_system_table_64_t;
432
433typedef struct {
434 efi_table_hdr_t hdr;
435 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
436 u32 fw_revision;
437 u32 con_in_handle;
438 u32 con_in;
439 u32 con_out_handle;
440 u32 con_out;
441 u32 stderr_handle;
442 u32 stderr;
443 u32 runtime;
444 u32 boottime;
445 u32 nr_tables;
446 u32 tables;
447} efi_system_table_32_t;
448
449typedef struct {
450 efi_table_hdr_t hdr;
451 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
452 u32 fw_revision;
453 unsigned long con_in_handle;
454 unsigned long con_in;
455 unsigned long con_out_handle;
456 unsigned long con_out;
457 unsigned long stderr_handle;
458 unsigned long stderr;
459 efi_runtime_services_t *runtime;
460 efi_boot_services_t *boottime;
461 unsigned long nr_tables;
462 unsigned long tables;
463} efi_system_table_t;
464
465struct efi_memory_map {
466 void *phys_map;
467 void *map;
468 void *map_end;
469 int nr_map;
470 unsigned long desc_version;
471 unsigned long desc_size;
472};
473
474typedef struct {
475 u32 revision;
476 void *parent_handle;
477 efi_system_table_t *system_table;
478 void *device_handle;
479 void *file_path;
480 void *reserved;
481 u32 load_options_size;
482 void *load_options;
483 void *image_base;
484 __aligned_u64 image_size;
485 unsigned int image_code_type;
486 unsigned int image_data_type;
487 unsigned long unload;
488} efi_loaded_image_t;
489
490typedef struct {
491 u64 revision;
492 void *open_volume;
493} efi_file_io_interface_t;
494
495typedef struct {
496 u64 size;
497 u64 file_size;
498 u64 phys_size;
499 efi_time_t create_time;
500 efi_time_t last_access_time;
501 efi_time_t modification_time;
502 __aligned_u64 attribute;
503 efi_char16_t filename[1];
504} efi_file_info_t;
505
506typedef struct {
507 u64 revision;
508 void *open;
509 void *close;
510 void *delete;
511 void *read;
512 void *write;
513 void *get_position;
514 void *set_position;
515 void *get_info;
516 void *set_info;
517 void *flush;
518} efi_file_handle_t;
519
520#define EFI_FILE_MODE_READ 0x0000000000000001
521#define EFI_FILE_MODE_WRITE 0x0000000000000002
522#define EFI_FILE_MODE_CREATE 0x8000000000000000
523
524#define EFI_INVALID_TABLE_ADDR (~0UL)
525
526/*
527 * All runtime access to EFI goes through this structure:
528 */
529extern struct efi {
530 efi_system_table_t *systab; /* EFI system table */
531 unsigned int runtime_version; /* Runtime services version */
532 unsigned long mps; /* MPS table */
533 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
534 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
535 unsigned long smbios; /* SM BIOS table */
536 unsigned long sal_systab; /* SAL system table */
537 unsigned long boot_info; /* boot info table */
538 unsigned long hcdp; /* HCDP table */
539 unsigned long uga; /* UGA table */
540 unsigned long uv_systab; /* UV system table */
541 efi_get_time_t *get_time;
542 efi_set_time_t *set_time;
543 efi_get_wakeup_time_t *get_wakeup_time;
544 efi_set_wakeup_time_t *set_wakeup_time;
545 efi_get_variable_t *get_variable;
546 efi_get_next_variable_t *get_next_variable;
547 efi_set_variable_t *set_variable;
548 efi_query_variable_info_t *query_variable_info;
549 efi_update_capsule_t *update_capsule;
550 efi_query_capsule_caps_t *query_capsule_caps;
551 efi_get_next_high_mono_count_t *get_next_high_mono_count;
552 efi_reset_system_t *reset_system;
553 efi_set_virtual_address_map_t *set_virtual_address_map;
554} efi;
555
556static inline int
557efi_guidcmp (efi_guid_t left, efi_guid_t right)
558{
559 return memcmp(&left, &right, sizeof (efi_guid_t));
560}
561
562static inline char *
563efi_guid_unparse(efi_guid_t *guid, char *out)
564{
565 sprintf(out, "%pUl", guid->b);
566 return out;
567}
568
569extern void efi_init (void);
570extern void *efi_get_pal_addr (void);
571extern void efi_map_pal_code (void);
572extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
573extern void efi_gettimeofday (struct timespec *ts);
574extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
575#ifdef CONFIG_X86
576extern void efi_late_init(void);
577extern void efi_free_boot_services(void);
578#else
579static inline void efi_late_init(void) {}
580static inline void efi_free_boot_services(void) {}
581#endif
582extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
583extern u64 efi_get_iobase (void);
584extern u32 efi_mem_type (unsigned long phys_addr);
585extern u64 efi_mem_attributes (unsigned long phys_addr);
586extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
587extern int __init efi_uart_console_only (void);
588extern void efi_initialize_iomem_resources(struct resource *code_resource,
589 struct resource *data_resource, struct resource *bss_resource);
590extern unsigned long efi_get_time(void);
591extern int efi_set_rtc_mmss(unsigned long nowtime);
592extern void efi_reserve_boot_services(void);
593extern struct efi_memory_map memmap;
594
595/**
596 * efi_range_is_wc - check the WC bit on an address range
597 * @start: starting kvirt address
598 * @len: length of range
599 *
600 * Consult the EFI memory map and make sure it's ok to set this range WC.
601 * Returns true or false.
602 */
603static inline int efi_range_is_wc(unsigned long start, unsigned long len)
604{
605 unsigned long i;
606
607 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
608 unsigned long paddr = __pa(start + i);
609 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
610 return 0;
611 }
612 /* The range checked out */
613 return 1;
614}
615
616#ifdef CONFIG_EFI_PCDP
617extern int __init efi_setup_pcdp_console(char *);
618#endif
619
620/*
621 * We play games with efi_enabled so that the compiler will, if
622 * possible, remove EFI-related code altogether.
623 */
624#define EFI_BOOT 0 /* Were we booted from EFI? */
625#define EFI_SYSTEM_TABLES 1 /* Can we use EFI system tables? */
626#define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
627#define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
628#define EFI_MEMMAP 4 /* Can we use EFI memory map? */
629#define EFI_64BIT 5 /* Is the firmware 64-bit? */
630
631#ifdef CONFIG_EFI
632# ifdef CONFIG_X86
633extern int efi_enabled(int facility);
634# else
635static inline int efi_enabled(int facility)
636{
637 return 1;
638}
639# endif
640#else
641static inline int efi_enabled(int facility)
642{
643 return 0;
644}
645#endif
646
647/*
648 * Variable Attributes
649 */
650#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
651#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
652#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
653#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
654#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
655#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
656#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
657
658#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
659 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
660 EFI_VARIABLE_RUNTIME_ACCESS | \
661 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
662 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
663 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
664 EFI_VARIABLE_APPEND_WRITE)
665/*
666 * The type of search to perform when calling boottime->locate_handle
667 */
668#define EFI_LOCATE_ALL_HANDLES 0
669#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
670#define EFI_LOCATE_BY_PROTOCOL 2
671
672/*
673 * EFI Device Path information
674 */
675#define EFI_DEV_HW 0x01
676#define EFI_DEV_PCI 1
677#define EFI_DEV_PCCARD 2
678#define EFI_DEV_MEM_MAPPED 3
679#define EFI_DEV_VENDOR 4
680#define EFI_DEV_CONTROLLER 5
681#define EFI_DEV_ACPI 0x02
682#define EFI_DEV_BASIC_ACPI 1
683#define EFI_DEV_EXPANDED_ACPI 2
684#define EFI_DEV_MSG 0x03
685#define EFI_DEV_MSG_ATAPI 1
686#define EFI_DEV_MSG_SCSI 2
687#define EFI_DEV_MSG_FC 3
688#define EFI_DEV_MSG_1394 4
689#define EFI_DEV_MSG_USB 5
690#define EFI_DEV_MSG_USB_CLASS 15
691#define EFI_DEV_MSG_I20 6
692#define EFI_DEV_MSG_MAC 11
693#define EFI_DEV_MSG_IPV4 12
694#define EFI_DEV_MSG_IPV6 13
695#define EFI_DEV_MSG_INFINIBAND 9
696#define EFI_DEV_MSG_UART 14
697#define EFI_DEV_MSG_VENDOR 10
698#define EFI_DEV_MEDIA 0x04
699#define EFI_DEV_MEDIA_HARD_DRIVE 1
700#define EFI_DEV_MEDIA_CDROM 2
701#define EFI_DEV_MEDIA_VENDOR 3
702#define EFI_DEV_MEDIA_FILE 4
703#define EFI_DEV_MEDIA_PROTOCOL 5
704#define EFI_DEV_BIOS_BOOT 0x05
705#define EFI_DEV_END_PATH 0x7F
706#define EFI_DEV_END_PATH2 0xFF
707#define EFI_DEV_END_INSTANCE 0x01
708#define EFI_DEV_END_ENTIRE 0xFF
709
710struct efi_generic_dev_path {
711 u8 type;
712 u8 sub_type;
713 u16 length;
714} __attribute ((packed));
715
716static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
717{
718 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
719 *addr &= PAGE_MASK;
720}
721
722#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
723/*
724 * EFI Variable support.
725 *
726 * Different firmware drivers can expose their EFI-like variables using
727 * the following.
728 */
729
730struct efivar_operations {
731 efi_get_variable_t *get_variable;
732 efi_get_next_variable_t *get_next_variable;
733 efi_set_variable_t *set_variable;
734 efi_query_variable_info_t *query_variable_info;
735};
736
737struct efivars {
738 /*
739 * ->lock protects two things:
740 * 1) ->list - adds, removals, reads, writes
741 * 2) ops.[gs]et_variable() calls.
742 * It must not be held when creating sysfs entries or calling kmalloc.
743 * ops.get_next_variable() is only called from register_efivars(),
744 * which is protected by the BKL, so that path is safe.
745 */
746 spinlock_t lock;
747 struct list_head list;
748 struct kset *kset;
749 struct kobject *kobject;
750 struct bin_attribute *new_var, *del_var;
751 const struct efivar_operations *ops;
752 struct efivar_entry *walk_entry;
753 struct pstore_info efi_pstore_info;
754};
755
756int register_efivars(struct efivars *efivars,
757 const struct efivar_operations *ops,
758 struct kobject *parent_kobj);
759void unregister_efivars(struct efivars *efivars);
760
761#endif /* CONFIG_EFI_VARS */
762
763#endif /* _LINUX_EFI_H */