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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_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
33
34typedef unsigned long efi_status_t;
35typedef u8 efi_bool_t;
36typedef u16 efi_char16_t; /* UNICODE character */
37
38
39typedef struct {
40 u8 b[16];
41} efi_guid_t;
42
43#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
44((efi_guid_t) \
45{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
46 (b) & 0xff, ((b) >> 8) & 0xff, \
47 (c) & 0xff, ((c) >> 8) & 0xff, \
48 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
49
50/*
51 * Generic EFI table header
52 */
53typedef struct {
54 u64 signature;
55 u32 revision;
56 u32 headersize;
57 u32 crc32;
58 u32 reserved;
59} efi_table_hdr_t;
60
61/*
62 * Memory map descriptor:
63 */
64
65/* Memory types: */
66#define EFI_RESERVED_TYPE 0
67#define EFI_LOADER_CODE 1
68#define EFI_LOADER_DATA 2
69#define EFI_BOOT_SERVICES_CODE 3
70#define EFI_BOOT_SERVICES_DATA 4
71#define EFI_RUNTIME_SERVICES_CODE 5
72#define EFI_RUNTIME_SERVICES_DATA 6
73#define EFI_CONVENTIONAL_MEMORY 7
74#define EFI_UNUSABLE_MEMORY 8
75#define EFI_ACPI_RECLAIM_MEMORY 9
76#define EFI_ACPI_MEMORY_NVS 10
77#define EFI_MEMORY_MAPPED_IO 11
78#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
79#define EFI_PAL_CODE 13
80#define EFI_MAX_MEMORY_TYPE 14
81
82/* Attribute values: */
83#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
84#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
85#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
86#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
87#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
88#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
89#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
90#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
91#define EFI_MEMORY_DESCRIPTOR_VERSION 1
92
93#define EFI_PAGE_SHIFT 12
94
95typedef struct {
96 u32 type;
97 u32 pad;
98 u64 phys_addr;
99 u64 virt_addr;
100 u64 num_pages;
101 u64 attribute;
102} efi_memory_desc_t;
103
104typedef struct {
105 efi_guid_t guid;
106 u32 headersize;
107 u32 flags;
108 u32 imagesize;
109} efi_capsule_header_t;
110
111/*
112 * Allocation types for calls to boottime->allocate_pages.
113 */
114#define EFI_ALLOCATE_ANY_PAGES 0
115#define EFI_ALLOCATE_MAX_ADDRESS 1
116#define EFI_ALLOCATE_ADDRESS 2
117#define EFI_MAX_ALLOCATE_TYPE 3
118
119typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
120
121/*
122 * Types and defines for Time Services
123 */
124#define EFI_TIME_ADJUST_DAYLIGHT 0x1
125#define EFI_TIME_IN_DAYLIGHT 0x2
126#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
127
128typedef struct {
129 u16 year;
130 u8 month;
131 u8 day;
132 u8 hour;
133 u8 minute;
134 u8 second;
135 u8 pad1;
136 u32 nanosecond;
137 s16 timezone;
138 u8 daylight;
139 u8 pad2;
140} efi_time_t;
141
142typedef struct {
143 u32 resolution;
144 u32 accuracy;
145 u8 sets_to_zero;
146} efi_time_cap_t;
147
148/*
149 * EFI Boot Services table
150 */
151typedef struct {
152 efi_table_hdr_t hdr;
153 void *raise_tpl;
154 void *restore_tpl;
155 void *allocate_pages;
156 void *free_pages;
157 void *get_memory_map;
158 void *allocate_pool;
159 void *free_pool;
160 void *create_event;
161 void *set_timer;
162 void *wait_for_event;
163 void *signal_event;
164 void *close_event;
165 void *check_event;
166 void *install_protocol_interface;
167 void *reinstall_protocol_interface;
168 void *uninstall_protocol_interface;
169 void *handle_protocol;
170 void *__reserved;
171 void *register_protocol_notify;
172 void *locate_handle;
173 void *locate_device_path;
174 void *install_configuration_table;
175 void *load_image;
176 void *start_image;
177 void *exit;
178 void *unload_image;
179 void *exit_boot_services;
180 void *get_next_monotonic_count;
181 void *stall;
182 void *set_watchdog_timer;
183 void *connect_controller;
184 void *disconnect_controller;
185 void *open_protocol;
186 void *close_protocol;
187 void *open_protocol_information;
188 void *protocols_per_handle;
189 void *locate_handle_buffer;
190 void *locate_protocol;
191 void *install_multiple_protocol_interfaces;
192 void *uninstall_multiple_protocol_interfaces;
193 void *calculate_crc32;
194 void *copy_mem;
195 void *set_mem;
196 void *create_event_ex;
197} efi_boot_services_t;
198
199/*
200 * Types and defines for EFI ResetSystem
201 */
202#define EFI_RESET_COLD 0
203#define EFI_RESET_WARM 1
204#define EFI_RESET_SHUTDOWN 2
205
206/*
207 * EFI Runtime Services table
208 */
209#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
210#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
211
212typedef struct {
213 efi_table_hdr_t hdr;
214 unsigned long get_time;
215 unsigned long set_time;
216 unsigned long get_wakeup_time;
217 unsigned long set_wakeup_time;
218 unsigned long set_virtual_address_map;
219 unsigned long convert_pointer;
220 unsigned long get_variable;
221 unsigned long get_next_variable;
222 unsigned long set_variable;
223 unsigned long get_next_high_mono_count;
224 unsigned long reset_system;
225 unsigned long update_capsule;
226 unsigned long query_capsule_caps;
227 unsigned long query_variable_info;
228} efi_runtime_services_t;
229
230typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
231typedef efi_status_t efi_set_time_t (efi_time_t *tm);
232typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
233 efi_time_t *tm);
234typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
235typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
236 unsigned long *data_size, void *data);
237typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
238 efi_guid_t *vendor);
239typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
240 u32 attr, unsigned long data_size,
241 void *data);
242typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
243typedef void efi_reset_system_t (int reset_type, efi_status_t status,
244 unsigned long data_size, efi_char16_t *data);
245typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
246 unsigned long descriptor_size,
247 u32 descriptor_version,
248 efi_memory_desc_t *virtual_map);
249typedef efi_status_t efi_query_variable_info_t(u32 attr,
250 u64 *storage_space,
251 u64 *remaining_space,
252 u64 *max_variable_size);
253typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
254 unsigned long count,
255 unsigned long sg_list);
256typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
257 unsigned long count,
258 u64 *max_size,
259 int *reset_type);
260
261/*
262 * EFI Configuration Table and GUID definitions
263 */
264#define NULL_GUID \
265 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
266
267#define MPS_TABLE_GUID \
268 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
269
270#define ACPI_TABLE_GUID \
271 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
272
273#define ACPI_20_TABLE_GUID \
274 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
275
276#define SMBIOS_TABLE_GUID \
277 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
278
279#define SAL_SYSTEM_TABLE_GUID \
280 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
281
282#define HCDP_TABLE_GUID \
283 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
284
285#define UGA_IO_PROTOCOL_GUID \
286 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
287
288#define EFI_GLOBAL_VARIABLE_GUID \
289 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
290
291#define UV_SYSTEM_TABLE_GUID \
292 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
293
294#define LINUX_EFI_CRASH_GUID \
295 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
296
297#define LOADED_IMAGE_PROTOCOL_GUID \
298 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
299
300#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
301 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
302
303#define EFI_UGA_PROTOCOL_GUID \
304 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
305
306#define EFI_PCI_IO_PROTOCOL_GUID \
307 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
308
309#define EFI_FILE_INFO_ID \
310 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
311
312#define EFI_FILE_SYSTEM_GUID \
313 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
314
315typedef struct {
316 efi_guid_t guid;
317 u64 table;
318} efi_config_table_64_t;
319
320typedef struct {
321 efi_guid_t guid;
322 u32 table;
323} efi_config_table_32_t;
324
325typedef struct {
326 efi_guid_t guid;
327 unsigned long table;
328} efi_config_table_t;
329
330#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
331
332#define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
333#define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
334#define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
335#define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
336#define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
337#define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
338
339typedef struct {
340 efi_table_hdr_t hdr;
341 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
342 u32 fw_revision;
343 u32 __pad1;
344 u64 con_in_handle;
345 u64 con_in;
346 u64 con_out_handle;
347 u64 con_out;
348 u64 stderr_handle;
349 u64 stderr;
350 u64 runtime;
351 u64 boottime;
352 u32 nr_tables;
353 u32 __pad2;
354 u64 tables;
355} efi_system_table_64_t;
356
357typedef struct {
358 efi_table_hdr_t hdr;
359 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
360 u32 fw_revision;
361 u32 con_in_handle;
362 u32 con_in;
363 u32 con_out_handle;
364 u32 con_out;
365 u32 stderr_handle;
366 u32 stderr;
367 u32 runtime;
368 u32 boottime;
369 u32 nr_tables;
370 u32 tables;
371} efi_system_table_32_t;
372
373typedef struct {
374 efi_table_hdr_t hdr;
375 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
376 u32 fw_revision;
377 unsigned long con_in_handle;
378 unsigned long con_in;
379 unsigned long con_out_handle;
380 unsigned long con_out;
381 unsigned long stderr_handle;
382 unsigned long stderr;
383 efi_runtime_services_t *runtime;
384 efi_boot_services_t *boottime;
385 unsigned long nr_tables;
386 unsigned long tables;
387} efi_system_table_t;
388
389struct efi_memory_map {
390 void *phys_map;
391 void *map;
392 void *map_end;
393 int nr_map;
394 unsigned long desc_version;
395 unsigned long desc_size;
396};
397
398typedef struct {
399 u32 revision;
400 void *parent_handle;
401 efi_system_table_t *system_table;
402 void *device_handle;
403 void *file_path;
404 void *reserved;
405 u32 load_options_size;
406 void *load_options;
407 void *image_base;
408 __aligned_u64 image_size;
409 unsigned int image_code_type;
410 unsigned int image_data_type;
411 unsigned long unload;
412} efi_loaded_image_t;
413
414typedef struct {
415 u64 revision;
416 void *open_volume;
417} efi_file_io_interface_t;
418
419typedef struct {
420 u64 size;
421 u64 file_size;
422 u64 phys_size;
423 efi_time_t create_time;
424 efi_time_t last_access_time;
425 efi_time_t modification_time;
426 __aligned_u64 attribute;
427 efi_char16_t filename[1];
428} efi_file_info_t;
429
430typedef struct {
431 u64 revision;
432 void *open;
433 void *close;
434 void *delete;
435 void *read;
436 void *write;
437 void *get_position;
438 void *set_position;
439 void *get_info;
440 void *set_info;
441 void *flush;
442} efi_file_handle_t;
443
444#define EFI_FILE_MODE_READ 0x0000000000000001
445#define EFI_FILE_MODE_WRITE 0x0000000000000002
446#define EFI_FILE_MODE_CREATE 0x8000000000000000
447
448#define EFI_INVALID_TABLE_ADDR (~0UL)
449
450/*
451 * All runtime access to EFI goes through this structure:
452 */
453extern struct efi {
454 efi_system_table_t *systab; /* EFI system table */
455 unsigned int runtime_version; /* Runtime services version */
456 unsigned long mps; /* MPS table */
457 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
458 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
459 unsigned long smbios; /* SM BIOS table */
460 unsigned long sal_systab; /* SAL system table */
461 unsigned long boot_info; /* boot info table */
462 unsigned long hcdp; /* HCDP table */
463 unsigned long uga; /* UGA table */
464 unsigned long uv_systab; /* UV system table */
465 efi_get_time_t *get_time;
466 efi_set_time_t *set_time;
467 efi_get_wakeup_time_t *get_wakeup_time;
468 efi_set_wakeup_time_t *set_wakeup_time;
469 efi_get_variable_t *get_variable;
470 efi_get_next_variable_t *get_next_variable;
471 efi_set_variable_t *set_variable;
472 efi_query_variable_info_t *query_variable_info;
473 efi_update_capsule_t *update_capsule;
474 efi_query_capsule_caps_t *query_capsule_caps;
475 efi_get_next_high_mono_count_t *get_next_high_mono_count;
476 efi_reset_system_t *reset_system;
477 efi_set_virtual_address_map_t *set_virtual_address_map;
478} efi;
479
480static inline int
481efi_guidcmp (efi_guid_t left, efi_guid_t right)
482{
483 return memcmp(&left, &right, sizeof (efi_guid_t));
484}
485
486static inline char *
487efi_guid_unparse(efi_guid_t *guid, char *out)
488{
489 sprintf(out, "%pUl", guid->b);
490 return out;
491}
492
493extern void efi_init (void);
494extern void *efi_get_pal_addr (void);
495extern void efi_map_pal_code (void);
496extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
497extern void efi_gettimeofday (struct timespec *ts);
498extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
499extern u64 efi_get_iobase (void);
500extern u32 efi_mem_type (unsigned long phys_addr);
501extern u64 efi_mem_attributes (unsigned long phys_addr);
502extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
503extern int __init efi_uart_console_only (void);
504extern void efi_initialize_iomem_resources(struct resource *code_resource,
505 struct resource *data_resource, struct resource *bss_resource);
506extern unsigned long efi_get_time(void);
507extern int efi_set_rtc_mmss(unsigned long nowtime);
508extern void efi_reserve_boot_services(void);
509extern struct efi_memory_map memmap;
510
511/**
512 * efi_range_is_wc - check the WC bit on an address range
513 * @start: starting kvirt address
514 * @len: length of range
515 *
516 * Consult the EFI memory map and make sure it's ok to set this range WC.
517 * Returns true or false.
518 */
519static inline int efi_range_is_wc(unsigned long start, unsigned long len)
520{
521 unsigned long i;
522
523 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
524 unsigned long paddr = __pa(start + i);
525 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
526 return 0;
527 }
528 /* The range checked out */
529 return 1;
530}
531
532#ifdef CONFIG_EFI_PCDP
533extern int __init efi_setup_pcdp_console(char *);
534#endif
535
536/*
537 * We play games with efi_enabled so that the compiler will, if possible, remove
538 * EFI-related code altogether.
539 */
540#ifdef CONFIG_EFI
541# ifdef CONFIG_X86
542 extern int efi_enabled;
543 extern bool efi_64bit;
544# else
545# define efi_enabled 1
546# endif
547#else
548# define efi_enabled 0
549#endif
550
551/*
552 * Variable Attributes
553 */
554#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
555#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
556#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
557#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
558#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
559#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
560#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
561
562#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
563 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
564 EFI_VARIABLE_RUNTIME_ACCESS | \
565 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
566 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
567 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
568 EFI_VARIABLE_APPEND_WRITE)
569/*
570 * The type of search to perform when calling boottime->locate_handle
571 */
572#define EFI_LOCATE_ALL_HANDLES 0
573#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
574#define EFI_LOCATE_BY_PROTOCOL 2
575
576/*
577 * EFI Device Path information
578 */
579#define EFI_DEV_HW 0x01
580#define EFI_DEV_PCI 1
581#define EFI_DEV_PCCARD 2
582#define EFI_DEV_MEM_MAPPED 3
583#define EFI_DEV_VENDOR 4
584#define EFI_DEV_CONTROLLER 5
585#define EFI_DEV_ACPI 0x02
586#define EFI_DEV_BASIC_ACPI 1
587#define EFI_DEV_EXPANDED_ACPI 2
588#define EFI_DEV_MSG 0x03
589#define EFI_DEV_MSG_ATAPI 1
590#define EFI_DEV_MSG_SCSI 2
591#define EFI_DEV_MSG_FC 3
592#define EFI_DEV_MSG_1394 4
593#define EFI_DEV_MSG_USB 5
594#define EFI_DEV_MSG_USB_CLASS 15
595#define EFI_DEV_MSG_I20 6
596#define EFI_DEV_MSG_MAC 11
597#define EFI_DEV_MSG_IPV4 12
598#define EFI_DEV_MSG_IPV6 13
599#define EFI_DEV_MSG_INFINIBAND 9
600#define EFI_DEV_MSG_UART 14
601#define EFI_DEV_MSG_VENDOR 10
602#define EFI_DEV_MEDIA 0x04
603#define EFI_DEV_MEDIA_HARD_DRIVE 1
604#define EFI_DEV_MEDIA_CDROM 2
605#define EFI_DEV_MEDIA_VENDOR 3
606#define EFI_DEV_MEDIA_FILE 4
607#define EFI_DEV_MEDIA_PROTOCOL 5
608#define EFI_DEV_BIOS_BOOT 0x05
609#define EFI_DEV_END_PATH 0x7F
610#define EFI_DEV_END_PATH2 0xFF
611#define EFI_DEV_END_INSTANCE 0x01
612#define EFI_DEV_END_ENTIRE 0xFF
613
614struct efi_generic_dev_path {
615 u8 type;
616 u8 sub_type;
617 u16 length;
618} __attribute ((packed));
619
620static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
621{
622 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
623 *addr &= PAGE_MASK;
624}
625
626#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
627/*
628 * EFI Variable support.
629 *
630 * Different firmware drivers can expose their EFI-like variables using
631 * the following.
632 */
633
634struct efivar_operations {
635 efi_get_variable_t *get_variable;
636 efi_get_next_variable_t *get_next_variable;
637 efi_set_variable_t *set_variable;
638};
639
640struct efivars {
641 /*
642 * ->lock protects two things:
643 * 1) ->list - adds, removals, reads, writes
644 * 2) ops.[gs]et_variable() calls.
645 * It must not be held when creating sysfs entries or calling kmalloc.
646 * ops.get_next_variable() is only called from register_efivars(),
647 * which is protected by the BKL, so that path is safe.
648 */
649 spinlock_t lock;
650 struct list_head list;
651 struct kset *kset;
652 struct bin_attribute *new_var, *del_var;
653 const struct efivar_operations *ops;
654 struct efivar_entry *walk_entry;
655 struct pstore_info efi_pstore_info;
656};
657
658int register_efivars(struct efivars *efivars,
659 const struct efivar_operations *ops,
660 struct kobject *parent_kobj);
661void unregister_efivars(struct efivars *efivars);
662
663#endif /* CONFIG_EFI_VARS */
664
665#endif /* _LINUX_EFI_H */