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