efi: Defer freeing boot services memory until after ACPI init
[linux-3.10.git] / include / linux / efi.h
1 #ifndef _LINUX_EFI_H
2 #define _LINUX_EFI_H
3
4 /*
5  * Extensible Firmware Interface
6  * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
7  *
8  * Copyright (C) 1999 VA Linux Systems
9  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
10  * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
11  *      David Mosberger-Tang <davidm@hpl.hp.com>
12  *      Stephane Eranian <eranian@hpl.hp.com>
13  */
14 #include <linux/init.h>
15 #include <linux/string.h>
16 #include <linux/time.h>
17 #include <linux/types.h>
18 #include <linux/proc_fs.h>
19 #include <linux/rtc.h>
20 #include <linux/ioport.h>
21 #include <linux/pfn.h>
22 #include <linux/pstore.h>
23
24 #include <asm/page.h>
25
26 #define EFI_SUCCESS             0
27 #define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
28 #define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
29 #define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
30 #define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
31 #define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
32 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
33
34 typedef unsigned long efi_status_t;
35 typedef u8 efi_bool_t;
36 typedef u16 efi_char16_t;               /* UNICODE character */
37
38
39 typedef 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  */
53 typedef 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
95 typedef 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
104 typedef 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
119 typedef 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
128 typedef 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
142 typedef 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  */
151 typedef 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
212 typedef 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
230 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
231 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
232 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
233                                             efi_time_t *tm);
234 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
235 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
236                                          unsigned long *data_size, void *data);
237 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
238                                               efi_guid_t *vendor);
239 typedef 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);
242 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
243 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
244                                  unsigned long data_size, efi_char16_t *data);
245 typedef 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);
249 typedef efi_status_t efi_query_variable_info_t(u32 attr,
250                                                u64 *storage_space,
251                                                u64 *remaining_space,
252                                                u64 *max_variable_size);
253 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
254                                           unsigned long count,
255                                           unsigned long sg_list);
256 typedef 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
315 typedef struct {
316         efi_guid_t guid;
317         u64 table;
318 } efi_config_table_64_t;
319
320 typedef struct {
321         efi_guid_t guid;
322         u32 table;
323 } efi_config_table_32_t;
324
325 typedef 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
339 typedef 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
357 typedef 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
373 typedef 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
389 struct 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
398 typedef 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
414 typedef struct {
415         u64 revision;
416         void *open_volume;
417 } efi_file_io_interface_t;
418
419 typedef 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
430 typedef 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  */
453 extern 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
480 static inline int
481 efi_guidcmp (efi_guid_t left, efi_guid_t right)
482 {
483         return memcmp(&left, &right, sizeof (efi_guid_t));
484 }
485
486 static inline char *
487 efi_guid_unparse(efi_guid_t *guid, char *out)
488 {
489         sprintf(out, "%pUl", guid->b);
490         return out;
491 }
492
493 extern void efi_init (void);
494 extern void *efi_get_pal_addr (void);
495 extern void efi_map_pal_code (void);
496 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
497 extern void efi_gettimeofday (struct timespec *ts);
498 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
499 #ifdef CONFIG_X86
500 extern void efi_free_boot_services(void);
501 #else
502 static inline void efi_free_boot_services(void) {}
503 #endif
504 extern u64 efi_get_iobase (void);
505 extern u32 efi_mem_type (unsigned long phys_addr);
506 extern u64 efi_mem_attributes (unsigned long phys_addr);
507 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
508 extern int __init efi_uart_console_only (void);
509 extern void efi_initialize_iomem_resources(struct resource *code_resource,
510                 struct resource *data_resource, struct resource *bss_resource);
511 extern unsigned long efi_get_time(void);
512 extern int efi_set_rtc_mmss(unsigned long nowtime);
513 extern void efi_reserve_boot_services(void);
514 extern struct efi_memory_map memmap;
515
516 /**
517  * efi_range_is_wc - check the WC bit on an address range
518  * @start: starting kvirt address
519  * @len: length of range
520  *
521  * Consult the EFI memory map and make sure it's ok to set this range WC.
522  * Returns true or false.
523  */
524 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
525 {
526         unsigned long i;
527
528         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
529                 unsigned long paddr = __pa(start + i);
530                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
531                         return 0;
532         }
533         /* The range checked out */
534         return 1;
535 }
536
537 #ifdef CONFIG_EFI_PCDP
538 extern int __init efi_setup_pcdp_console(char *);
539 #endif
540
541 /*
542  * We play games with efi_enabled so that the compiler will, if possible, remove
543  * EFI-related code altogether.
544  */
545 #ifdef CONFIG_EFI
546 # ifdef CONFIG_X86
547    extern int efi_enabled;
548    extern bool efi_64bit;
549 # else
550 #  define efi_enabled 1
551 # endif
552 #else
553 # define efi_enabled 0
554 #endif
555
556 /*
557  * Variable Attributes
558  */
559 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
560 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
561 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
562 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
563 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
564 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
565 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
566
567 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
568                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
569                                 EFI_VARIABLE_RUNTIME_ACCESS | \
570                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
571                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
572                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
573                                 EFI_VARIABLE_APPEND_WRITE)
574 /*
575  * The type of search to perform when calling boottime->locate_handle
576  */
577 #define EFI_LOCATE_ALL_HANDLES                  0
578 #define EFI_LOCATE_BY_REGISTER_NOTIFY           1
579 #define EFI_LOCATE_BY_PROTOCOL                  2
580
581 /*
582  * EFI Device Path information
583  */
584 #define EFI_DEV_HW                      0x01
585 #define  EFI_DEV_PCI                             1
586 #define  EFI_DEV_PCCARD                          2
587 #define  EFI_DEV_MEM_MAPPED                      3
588 #define  EFI_DEV_VENDOR                          4
589 #define  EFI_DEV_CONTROLLER                      5
590 #define EFI_DEV_ACPI                    0x02
591 #define   EFI_DEV_BASIC_ACPI                     1
592 #define   EFI_DEV_EXPANDED_ACPI                  2
593 #define EFI_DEV_MSG                     0x03
594 #define   EFI_DEV_MSG_ATAPI                      1
595 #define   EFI_DEV_MSG_SCSI                       2
596 #define   EFI_DEV_MSG_FC                         3
597 #define   EFI_DEV_MSG_1394                       4
598 #define   EFI_DEV_MSG_USB                        5
599 #define   EFI_DEV_MSG_USB_CLASS                 15
600 #define   EFI_DEV_MSG_I20                        6
601 #define   EFI_DEV_MSG_MAC                       11
602 #define   EFI_DEV_MSG_IPV4                      12
603 #define   EFI_DEV_MSG_IPV6                      13
604 #define   EFI_DEV_MSG_INFINIBAND                 9
605 #define   EFI_DEV_MSG_UART                      14
606 #define   EFI_DEV_MSG_VENDOR                    10
607 #define EFI_DEV_MEDIA                   0x04
608 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
609 #define   EFI_DEV_MEDIA_CDROM                    2
610 #define   EFI_DEV_MEDIA_VENDOR                   3
611 #define   EFI_DEV_MEDIA_FILE                     4
612 #define   EFI_DEV_MEDIA_PROTOCOL                 5
613 #define EFI_DEV_BIOS_BOOT               0x05
614 #define EFI_DEV_END_PATH                0x7F
615 #define EFI_DEV_END_PATH2               0xFF
616 #define   EFI_DEV_END_INSTANCE                  0x01
617 #define   EFI_DEV_END_ENTIRE                    0xFF
618
619 struct efi_generic_dev_path {
620         u8 type;
621         u8 sub_type;
622         u16 length;
623 } __attribute ((packed));
624
625 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
626 {
627         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
628         *addr &= PAGE_MASK;
629 }
630
631 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
632 /*
633  * EFI Variable support.
634  *
635  * Different firmware drivers can expose their EFI-like variables using
636  * the following.
637  */
638
639 struct efivar_operations {
640         efi_get_variable_t *get_variable;
641         efi_get_next_variable_t *get_next_variable;
642         efi_set_variable_t *set_variable;
643 };
644
645 struct efivars {
646         /*
647          * ->lock protects two things:
648          * 1) ->list - adds, removals, reads, writes
649          * 2) ops.[gs]et_variable() calls.
650          * It must not be held when creating sysfs entries or calling kmalloc.
651          * ops.get_next_variable() is only called from register_efivars(),
652          * which is protected by the BKL, so that path is safe.
653          */
654         spinlock_t lock;
655         struct list_head list;
656         struct kset *kset;
657         struct bin_attribute *new_var, *del_var;
658         const struct efivar_operations *ops;
659         struct efivar_entry *walk_entry;
660         struct pstore_info efi_pstore_info;
661 };
662
663 int register_efivars(struct efivars *efivars,
664                      const struct efivar_operations *ops,
665                      struct kobject *parent_kobj);
666 void unregister_efivars(struct efivars *efivars);
667
668 #endif /* CONFIG_EFI_VARS */
669
670 #endif /* _LINUX_EFI_H */