summaryrefslogtreecommitdiffstats
path: root/include/linux/efi.h
blob: 80b21d1c6eafafd825686b8454e66808a83ce470 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_EFI_H
#define _LINUX_EFI_H

/*
 * Extensible Firmware Interface
 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
 *
 * Copyright (C) 1999 VA Linux Systems
 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 *	Stephane Eranian <eranian@hpl.hp.com>
 */
#include <linux/init.h>
#include <linux/string.h>
#include <linux/time.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/rtc.h>
#include <linux/ioport.h>
#include <linux/pfn.h>
#include <linux/pstore.h>
#include <linux/range.h>
#include <linux/reboot.h>
#include <linux/uuid.h>

#include <asm/page.h>

struct screen_info;

#define EFI_SUCCESS		0
#define EFI_LOAD_ERROR		( 1 | (1UL << (BITS_PER_LONG-1)))
#define EFI_INVALID_PARAMETER	( 2 | (1UL << (BITS_PER_LONG-1)))
#define EFI_UNSUPPORTED		( 3 | (1UL << (BITS_PER_LONG-1)))
#define EFI_BAD_BUFFER_SIZE	( 4 | (1UL << (BITS_PER_LONG-1)))
#define EFI_BUFFER_TOO_SMALL	( 5 | (1UL << (BITS_PER_LONG-1)))
#define EFI_NOT_READY		( 6 | (1UL << (BITS_PER_LONG-1)))
#define EFI_DEVICE_ERROR	( 7 | (1UL << (BITS_PER_LONG-1)))
#define EFI_WRITE_PROTECTED	( 8 | (1UL << (BITS_PER_LONG-1)))
#define EFI_OUT_OF_RESOURCES	( 9 | (1UL << (BITS_PER_LONG-1)))
#define EFI_NOT_FOUND		(14 | (1UL << (BITS_PER_LONG-1)))
#define EFI_TIMEOUT		(18 | (1UL << (BITS_PER_LONG-1)))
#define EFI_ABORTED		(21 | (1UL << (BITS_PER_LONG-1)))
#define EFI_SECURITY_VIOLATION	(26 | (1UL << (BITS_PER_LONG-1)))

typedef unsigned long efi_status_t;
typedef u8 efi_bool_t;
typedef u16 efi_char16_t;		/* UNICODE character */
typedef u64 efi_physical_addr_t;
typedef void *efi_handle_t;

#if defined(CONFIG_X86_64)
#define __efiapi __attribute__((ms_abi))
#elif defined(CONFIG_X86_32)
#define __efiapi __attribute__((regparm(0)))
#else
#define __efiapi
#endif

/*
 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as
 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM),
 * this means that firmware services invoked by the kernel may assume that
 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that
 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits.
 *
 * Note that the UEFI spec as well as some comments in the EDK2 code base
 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be
 * a mistake, given that no code seems to exist that actually enforces that
 * or relies on it.
 */
typedef guid_t efi_guid_t __aligned(__alignof__(u32));

#define EFI_GUID(a, b, c, d...) (efi_guid_t){ {					\
	(a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff,	\
	(b) & 0xff, ((b) >> 8) & 0xff,						\
	(c) & 0xff, ((c) >> 8) & 0xff, d } }

/*
 * Generic EFI table header
 */
typedef	struct {
	u64 signature;
	u32 revision;
	u32 headersize;
	u32 crc32;
	u32 reserved;
} efi_table_hdr_t;

/*
 * Memory map descriptor:
 */

/* Memory types: */
#define EFI_RESERVED_TYPE		 0
#define EFI_LOADER_CODE			 1
#define EFI_LOADER_DATA			 2
#define EFI_BOOT_SERVICES_CODE		 3
#define EFI_BOOT_SERVICES_DATA		 4
#define EFI_RUNTIME_SERVICES_CODE	 5
#define EFI_RUNTIME_SERVICES_DATA	 6
#define EFI_CONVENTIONAL_MEMORY		 7
#define EFI_UNUSABLE_MEMORY		 8
#define EFI_ACPI_RECLAIM_MEMORY		 9
#define EFI_ACPI_MEMORY_NVS		10
#define EFI_MEMORY_MAPPED_IO		11
#define EFI_MEMORY_MAPPED_IO_PORT_SPACE	12
#define EFI_PAL_CODE			13
#define EFI_PERSISTENT_MEMORY		14
#define EFI_UNACCEPTED_MEMORY		15
#define EFI_MAX_MEMORY_TYPE		16

/* Attribute values: */
#define EFI_MEMORY_UC		((u64)0x0000000000000001ULL)	/* uncached */
#define EFI_MEMORY_WC		((u64)0x0000000000000002ULL)	/* write-coalescing */
#define EFI_MEMORY_WT		((u64)0x0000000000000004ULL)	/* write-through */
#define EFI_MEMORY_WB		((u64)0x0000000000000008ULL)	/* write-back */
#define EFI_MEMORY_UCE		((u64)0x0000000000000010ULL)	/* uncached, exported */
#define EFI_MEMORY_WP		((u64)0x0000000000001000ULL)	/* write-protect */
#define EFI_MEMORY_RP		((u64)0x0000000000002000ULL)	/* read-protect */
#define EFI_MEMORY_XP		((u64)0x0000000000004000ULL)	/* execute-protect */
#define EFI_MEMORY_NV		((u64)0x0000000000008000ULL)	/* non-volatile */
#define EFI_MEMORY_MORE_RELIABLE \
				((u64)0x0000000000010000ULL)	/* higher reliability */
#define EFI_MEMORY_RO		((u64)0x0000000000020000ULL)	/* read-only */
#define EFI_MEMORY_SP		((u64)0x0000000000040000ULL)	/* soft reserved */
#define EFI_MEMORY_CPU_CRYPTO	((u64)0x0000000000080000ULL)	/* supports encryption */
#define EFI_MEMORY_RUNTIME	((u64)0x8000000000000000ULL)	/* range requires runtime mapping */
#define EFI_MEMORY_DESCRIPTOR_VERSION	1

#define EFI_PAGE_SHIFT		12
#define EFI_PAGE_SIZE		(1UL << EFI_PAGE_SHIFT)
#define EFI_PAGES_MAX		(U64_MAX >> EFI_PAGE_SHIFT)

typedef struct {
	u32 type;
	u32 pad;
	u64 phys_addr;
	u64 virt_addr;
	u64 num_pages;
	u64 attribute;
} efi_memory_desc_t;

typedef struct {
	efi_guid_t guid;
	u32 headersize;
	u32 flags;
	u32 imagesize;
} efi_capsule_header_t;

/* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */
struct efi_manage_capsule_header {
	u32 ver;
	u16 emb_drv_cnt;
	u16 payload_cnt;
	/*
	 * Variable-size array of the size given by the sum of
	 * emb_drv_cnt and payload_cnt.
	 */
	u64 offset_list[];
} __packed;

/* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */
struct efi_manage_capsule_image_header {
	u32 ver;
	efi_guid_t image_type_id;
	u8 image_index;
	u8 reserved_bytes[3];
	u32 image_size;
	u32 vendor_code_size;
	/* hw_ins was introduced in version 2 */
	u64 hw_ins;
	/* capsule_support was introduced in version 3 */
	u64 capsule_support;
} __packed;

/* WIN_CERTIFICATE */
struct win_cert {
	u32 len;
	u16 rev;
	u16 cert_type;
};

/* WIN_CERTIFICATE_UEFI_GUID */
struct win_cert_uefi_guid {
	struct win_cert	hdr;
	efi_guid_t cert_type;
	u8 cert_data[];
};

/* EFI_FIRMWARE_IMAGE_AUTHENTICATION */
struct efi_image_auth {
	u64 mon_count;
	struct win_cert_uefi_guid auth_info;
};

/*
 * EFI capsule flags
 */
#define EFI_CAPSULE_PERSIST_ACROSS_RESET	0x00010000
#define EFI_CAPSULE_POPULATE_SYSTEM_TABLE	0x00020000
#define EFI_CAPSULE_INITIATE_RESET		0x00040000

struct capsule_info {
	efi_capsule_header_t	header;
	efi_capsule_header_t	*capsule;
	int			reset_type;
	long			index;
	size_t			count;
	size_t			total_size;
	struct page		**pages;
	phys_addr_t		*phys;
	size_t			page_bytes_remain;
};

int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff,
                           size_t hdr_bytes);
int __efi_capsule_setup_info(struct capsule_info *cap_info);

/*
 * Types and defines for Time Services
 */
#define EFI_TIME_ADJUST_DAYLIGHT 0x1
#define EFI_TIME_IN_DAYLIGHT     0x2
#define EFI_UNSPECIFIED_TIMEZONE 0x07ff

typedef struct {
	u16 year;
	u8 month;
	u8 day;
	u8 hour;
	u8 minute;
	u8 second;
	u8 pad1;
	u32 nanosecond;
	s16 timezone;
	u8 daylight;
	u8 pad2;
} efi_time_t;

typedef struct {
	u32 resolution;
	u32 accuracy;
	u8 sets_to_zero;
} efi_time_cap_t;

typedef union efi_boot_services efi_boot_services_t;

/*
 * Types and defines for EFI ResetSystem
 */
#define EFI_RESET_COLD 0
#define EFI_RESET_WARM 1
#define EFI_RESET_SHUTDOWN 2

/*
 * EFI Runtime Services table
 */
#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
#define EFI_RUNTIME_SERVICES_REVISION  0x00010000

typedef struct {
	efi_table_hdr_t hdr;
	u32 get_time;
	u32 set_time;
	u32 get_wakeup_time;
	u32 set_wakeup_time;
	u32 set_virtual_address_map;
	u32 convert_pointer;
	u32 get_variable;
	u32 get_next_variable;
	u32 set_variable;
	u32 get_next_high_mono_count;
	u32 reset_system;
	u32 update_capsule;
	u32 query_capsule_caps;
	u32 query_variable_info;
} efi_runtime_services_32_t;

typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
typedef efi_status_t efi_set_time_t (efi_time_t *tm);
typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
					    efi_time_t *tm);
typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
					 unsigned long *data_size, void *data);
typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
					      efi_guid_t *vendor);
typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, 
					 u32 attr, unsigned long data_size,
					 void *data);
typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
typedef void efi_reset_system_t (int reset_type, efi_status_t status,
				 unsigned long data_size, efi_char16_t *data);
typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
						unsigned long descriptor_size,
						u32 descriptor_version,
						efi_memory_desc_t *virtual_map);
typedef efi_status_t efi_query_variable_info_t(u32 attr,
					       u64 *storage_space,
					       u64 *remaining_space,
					       u64 *max_variable_size);
typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
					  unsigned long count,
					  unsigned long sg_list);
typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
					      unsigned long count,
					      u64 *max_size,
					      int *reset_type);
typedef efi_status_t efi_query_variable_store_t(u32 attributes,
						unsigned long size,
						bool nonblocking);

typedef union {
	struct {
		efi_table_hdr_t				hdr;
		efi_get_time_t __efiapi			*get_time;
		efi_set_time_t __efiapi			*set_time;
		efi_get_wakeup_time_t __efiapi		*get_wakeup_time;
		efi_set_wakeup_time_t __efiapi		*set_wakeup_time;
		efi_set_virtual_address_map_t __efiapi	*set_virtual_address_map;
		void					*convert_pointer;
		efi_get_variable_t __efiapi		*get_variable;
		efi_get_next_variable_t __efiapi	*get_next_variable;
		efi_set_variable_t __efiapi		*set_variable;
		efi_get_next_high_mono_count_t __efiapi	*get_next_high_mono_count;
		efi_reset_system_t __efiapi		*reset_system;
		efi_update_capsule_t __efiapi		*update_capsule;
		efi_query_capsule_caps_t __efiapi	*query_capsule_caps;
		efi_query_variable_info_t __efiapi	*query_variable_info;
	};
	efi_runtime_services_32_t mixed_mode;
} efi_runtime_services_t;

void efi_native_runtime_setup(void);

/*
 * EFI Configuration Table and GUID definitions
 *
 * These are all defined in a single line to make them easier to
 * grep for and to see them at a glance - while still having a
 * similar structure to the definitions in the spec.
 *
 * Here's how they are structured:
 *
 * GUID: 12345678-1234-1234-1234-123456789012
 * Spec:
 *      #define EFI_SOME_PROTOCOL_GUID \
 *        {0x12345678,0x1234,0x1234,\
 *          {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
 * Here:
 *	#define SOME_PROTOCOL_GUID		EFI_GUID(0x12345678, 0x1234, 0x1234,  0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
 *					^ tabs					    ^extra space
 *
 * Note that the 'extra space' separates the values at the same place
 * where the UEFI SPEC breaks the line.
 */
#define NULL_GUID				EFI_GUID(0x00000000, 0x0000, 0x0000,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
#define MPS_TABLE_GUID				EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
#define ACPI_TABLE_GUID				EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
#define ACPI_20_TABLE_GUID			EFI_GUID(0x8868e871, 0xe4f1, 0x11d3,  0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
#define SMBIOS_TABLE_GUID			EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
#define SMBIOS3_TABLE_GUID			EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c,  0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
#define SAL_SYSTEM_TABLE_GUID			EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3,  0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
#define HCDP_TABLE_GUID				EFI_GUID(0xf951938d, 0x620b, 0x42ef,  0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
#define UGA_IO_PROTOCOL_GUID			EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b,  0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
#define EFI_GLOBAL_VARIABLE_GUID		EFI_GUID(0x8be4df61, 0x93ca, 0x11d2,  0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
#define UV_SYSTEM_TABLE_GUID			EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd,  0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
#define LINUX_EFI_CRASH_GUID			EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc,  0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
#define LOADED_IMAGE_PROTOCOL_GUID		EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2,  0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define LOADED_IMAGE_DEVICE_PATH_PROTOCOL_GUID	EFI_GUID(0xbc62157e, 0x3e33, 0x4fec,  0x99, 0x20, 0x2d, 0x3b, 0x36, 0xd7, 0x50, 0xdf)
#define EFI_DEVICE_PATH_PROTOCOL_GUID		EFI_GUID(0x09576e91, 0x6d3f, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID	EFI_GUID(0x8b843e20, 0x8132, 0x4852,  0x90, 0xcc, 0x55, 0x1a, 0x4e, 0x4a, 0x7f, 0x1c)
#define EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL_GUID	EFI_GUID(0x05c99a21, 0xc70f, 0x4ad2,  0x8a, 0x5f, 0x35, 0xdf, 0x33, 0x43, 0xf5, 0x1e)
#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID	EFI_GUID(0x9042a9de, 0x23dc, 0x4a38,  0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
#define EFI_UGA_PROTOCOL_GUID			EFI_GUID(0x982c298b, 0xf4fa, 0x41cb,  0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
#define EFI_PCI_IO_PROTOCOL_GUID		EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5,  0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
#define EFI_FILE_INFO_ID			EFI_GUID(0x09576e92, 0x6d3f, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define EFI_SYSTEM_RESOURCE_TABLE_GUID		EFI_GUID(0xb122a263, 0x3661, 0x4f68,  0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
#define EFI_FILE_SYSTEM_GUID			EFI_GUID(0x964e5b22, 0x6459, 0x11d2,  0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define DEVICE_TREE_GUID			EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5,  0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
#define EFI_PROPERTIES_TABLE_GUID		EFI_GUID(0x880aaca3, 0x4adc, 0x4a04,  0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
#define EFI_RNG_PROTOCOL_GUID			EFI_GUID(0x3152bca5, 0xeade, 0x433d,  0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
#define EFI_RNG_ALGORITHM_RAW			EFI_GUID(0xe43176d7, 0xb6e8, 0x4827,  0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
#define EFI_MEMORY_ATTRIBUTES_TABLE_GUID	EFI_GUID(0xdcfa911d, 0x26eb, 0x469f,  0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
#define EFI_CONSOLE_OUT_DEVICE_GUID		EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4,  0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
#define APPLE_PROPERTIES_PROTOCOL_GUID		EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb,  0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
#define EFI_TCG2_PROTOCOL_GUID			EFI_GUID(0x607f766c, 0x7455, 0x42be,  0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
#define EFI_LOAD_FILE_PROTOCOL_GUID		EFI_GUID(0x56ec3091, 0x954c, 0x11d2,  0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define EFI_LOAD_FILE2_PROTOCOL_GUID		EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e,  0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d)
#define EFI_RT_PROPERTIES_TABLE_GUID		EFI_GUID(0xeb66918a, 0x7eef, 0x402a,  0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)
#define EFI_DXE_SERVICES_TABLE_GUID		EFI_GUID(0x05ad34ba, 0x6f02, 0x4214,  0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
#define EFI_SMBIOS_PROTOCOL_GUID		EFI_GUID(0x03583ff6, 0xcb36, 0x4940,  0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7)
#define EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID	EFI_GUID(0xf4560cf6, 0x40ec, 0x4b4a,  0xa1, 0x92, 0xbf, 0x1d, 0x57, 0xd0, 0xb1, 0x89)

#define EFI_IMAGE_SECURITY_DATABASE_GUID	EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596,  0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
#define EFI_SHIM_LOCK_GUID			EFI_GUID(0x605dab50, 0xe046, 0x4300,  0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)

#define EFI_CERT_SHA256_GUID			EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
#define EFI_CERT_X509_GUID			EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
#define EFI_CERT_X509_SHA256_GUID		EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
#define EFI_CC_BLOB_GUID			EFI_GUID(0x067b1f5f, 0xcf26, 0x44c5, 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42)

/*
 * This GUID is used to pass to the kernel proper the struct screen_info
 * structure that was populated by the stub based on the GOP protocol instance
 * associated with ConOut
 */
#define LINUX_EFI_SCREEN_INFO_TABLE_GUID	EFI_GUID(0xe03fc20a, 0x85dc, 0x406e,  0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
#define LINUX_EFI_ARM_CPU_STATE_TABLE_GUID	EFI_GUID(0xef79e4aa, 0x3c3d, 0x4989,  0xb9, 0x02, 0x07, 0xa9, 0x43, 0xe5, 0x50, 0xd2)
#define LINUX_EFI_LOADER_ENTRY_GUID		EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf,  0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
#define LINUX_EFI_RANDOM_SEED_TABLE_GUID	EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2,  0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
#define LINUX_EFI_TPM_EVENT_LOG_GUID		EFI_GUID(0xb7799cb0, 0xeca2, 0x4943,  0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
#define LINUX_EFI_TPM_FINAL_LOG_GUID		EFI_GUID(0x1e2ed096, 0x30e2, 0x4254,  0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
#define LINUX_EFI_MEMRESERVE_TABLE_GUID		EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5,  0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
#define LINUX_EFI_INITRD_MEDIA_GUID		EFI_GUID(0x5568e427, 0x68fc, 0x4f3d,  0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)
#define LINUX_EFI_MOK_VARIABLE_TABLE_GUID	EFI_GUID(0xc451ed2b, 0x9694, 0x45d3,  0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89)
#define LINUX_EFI_COCO_SECRET_AREA_GUID		EFI_GUID(0xadf956ad, 0xe98c, 0x484c,  0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47)
#define LINUX_EFI_BOOT_MEMMAP_GUID		EFI_GUID(0x800f683f, 0xd08b, 0x423a,  0xa2, 0x93, 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4)
#define LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID	EFI_GUID(0xd5d1de3c, 0x105c, 0x44f9,  0x9e, 0xa9, 0xbc, 0xef, 0x98, 0x12, 0x00, 0x31)

#define RISCV_EFI_BOOT_PROTOCOL_GUID		EFI_GUID(0xccd15fec, 0x6f73, 0x4eec,  0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf)

/*
 * This GUID may be installed onto the kernel image's handle as a NULL protocol
 * to signal to the stub that the placement of the image should be respected,
 * and moving the image in physical memory is undesirable. To ensure
 * compatibility with 64k pages kernels with virtually mapped stacks, and to
 * avoid defeating physical randomization, this protocol should only be
 * installed if the image was placed at a randomized 128k aligned address in
 * memory.
 */
#define LINUX_EFI_LOADED_IMAGE_FIXED_GUID	EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5,  0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a)

/* OEM GUIDs */
#define DELLEMC_EFI_RCI2_TABLE_GUID		EFI_GUID(0x2d9f28a2, 0xa886, 0x456a,  0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
#define AMD_SEV_MEM_ENCRYPT_GUID		EFI_GUID(0x0cf29b71, 0x9e51, 0x433a,  0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75)

/* OVMF protocol GUIDs */
#define OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID	EFI_GUID(0xc5a010fe, 0x38a7, 0x4531,  0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49)

typedef struct {
	efi_guid_t guid;
	u64 table;
} efi_config_table_64_t;

typedef struct {
	efi_guid_t guid;
	u32 table;
} efi_config_table_32_t;

typedef union {
	struct {
		efi_guid_t guid;
		void *table;
	};
	efi_config_table_32_t mixed_mode;
} efi_config_table_t;

typedef struct {
	efi_guid_t guid;
	unsigned long *ptr;
	const char name[16];
} efi_config_table_type_t;

#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
#define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL)

#define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
#define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
#define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
#define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
#define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
#define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))

typedef struct {
	efi_table_hdr_t hdr;
	u64 fw_vendor;	/* physical addr of CHAR16 vendor string */
	u32 fw_revision;
	u32 __pad1;
	u64 con_in_handle;
	u64 con_in;
	u64 con_out_handle;
	u64 con_out;
	u64 stderr_handle;
	u64 stderr;
	u64 runtime;
	u64 boottime;
	u32 nr_tables;
	u32 __pad2;
	u64 tables;
} efi_system_table_64_t;

typedef struct {
	efi_table_hdr_t hdr;
	u32 fw_vendor;	/* physical addr of CHAR16 vendor string */
	u32 fw_revision;
	u32 con_in_handle;
	u32 con_in;
	u32 con_out_handle;
	u32 con_out;
	u32 stderr_handle;
	u32 stderr;
	u32 runtime;
	u32 boottime;
	u32 nr_tables;
	u32 tables;
} efi_system_table_32_t;

typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t;
typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;

typedef union {
	struct {
		efi_table_hdr_t hdr;
		unsigned long fw_vendor;	/* physical addr of CHAR16 vendor string */
		u32 fw_revision;
		unsigned long con_in_handle;
		efi_simple_text_input_protocol_t *con_in;
		unsigned long con_out_handle;
		efi_simple_text_output_protocol_t *con_out;
		unsigned long stderr_handle;
		unsigned long stderr;
		efi_runtime_services_t *runtime;
		efi_boot_services_t *boottime;
		unsigned long nr_tables;
		unsigned long tables;
	};
	efi_system_table_32_t mixed_mode;
} efi_system_table_t;

struct efi_boot_memmap {
	unsigned long		map_size;
	unsigned long		desc_size;
	u32			desc_ver;
	unsigned long		map_key;
	unsigned long		buff_size;
	efi_memory_desc_t	map[];
};

struct efi_unaccepted_memory {
	u32 version;
	u32 unit_size;
	u64 phys_base;
	u64 size;
	unsigned long bitmap[];
};

/*
 * Architecture independent structure for describing a memory map for the
 * benefit of efi_memmap_init_early(), and for passing context between
 * efi_memmap_alloc() and efi_memmap_install().
 */
struct efi_memory_map_data {
	phys_addr_t phys_map;
	unsigned long size;
	unsigned long desc_version;
	unsigned long desc_size;
	unsigned long flags;
};

struct efi_memory_map {
	phys_addr_t phys_map;
	void *map;
	void *map_end;
	int nr_map;
	unsigned long desc_version;
	unsigned long desc_size;
#define EFI_MEMMAP_LATE (1UL << 0)
#define EFI_MEMMAP_MEMBLOCK (1UL << 1)
#define EFI_MEMMAP_SLAB (1UL << 2)
	unsigned long flags;
};

struct efi_mem_range {
	struct range range;
	u64 attribute;
};

typedef struct {
	u32 version;
	u32 length;
	u64 memory_protection_attribute;
} efi_properties_table_t;

#define EFI_PROPERTIES_TABLE_VERSION	0x00010000
#define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA	0x1

typedef struct {
	u16 version;
	u16 length;
	u32 runtime_services_supported;
} efi_rt_properties_table_t;

#define EFI_RT_PROPERTIES_TABLE_VERSION	0x1

#define EFI_INVALID_TABLE_ADDR		(~0UL)

// BIT0 implies that Runtime code includes the forward control flow guard
// instruction, such as X86 CET-IBT or ARM BTI.
#define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD	0x1

typedef struct {
	u32 version;
	u32 num_entries;
	u32 desc_size;
	u32 flags;
	efi_memory_desc_t entry[0];
} efi_memory_attributes_table_t;

typedef struct {
	efi_guid_t signature_owner;
	u8 signature_data[];
} efi_signature_data_t;

typedef struct {
	efi_guid_t signature_type;
	u32 signature_list_size;
	u32 signature_header_size;
	u32 signature_size;
	u8 signature_header[];
	/* efi_signature_data_t signatures[][] */
} efi_signature_list_t;

typedef u8 efi_sha256_hash_t[32];

typedef struct {
	efi_sha256_hash_t to_be_signed_hash;
	efi_time_t time_of_revocation;
} efi_cert_x509_sha256_t;

extern unsigned long __ro_after_init efi_rng_seed;		/* RNG Seed table */

/*
 * All runtime access to EFI goes through this structure:
 */
extern struct efi {
	const efi_runtime_services_t	*runtime;		/* EFI runtime services table */
	unsigned int			runtime_version;	/* Runtime services version */
	unsigned int			runtime_supported_mask;

	unsigned long			acpi;			/* ACPI table  (IA64 ext 0.71) */
	unsigned long			acpi20;			/* ACPI table  (ACPI 2.0) */
	unsigned long			smbios;			/* SMBIOS table (32 bit entry point) */
	unsigned long			smbios3;		/* SMBIOS table (64 bit entry point) */
	unsigned long			esrt;			/* ESRT table */
	unsigned long			tpm_log;		/* TPM2 Event Log table */
	unsigned long			tpm_final_log;		/* TPM2 Final Events Log table */
	unsigned long			mokvar_table;		/* MOK variable config table */
	unsigned long			coco_secret;		/* Confidential computing secret table */
	unsigned long			unaccepted;		/* Unaccepted memory table */

	efi_get_time_t			*get_time;
	efi_set_time_t			*set_time;
	efi_get_wakeup_time_t		*get_wakeup_time;
	efi_set_wakeup_time_t		*set_wakeup_time;
	efi_get_variable_t		*get_variable;
	efi_get_next_variable_t		*get_next_variable;
	efi_set_variable_t		*set_variable;
	efi_set_variable_t		*set_variable_nonblocking;
	efi_query_variable_info_t	*query_variable_info;
	efi_query_variable_info_t	*query_variable_info_nonblocking;
	efi_update_capsule_t		*update_capsule;
	efi_query_capsule_caps_t	*query_capsule_caps;
	efi_get_next_high_mono_count_t	*get_next_high_mono_count;
	efi_reset_system_t		*reset_system;

	struct efi_memory_map		memmap;
	unsigned long			flags;
} efi;

#define EFI_RT_SUPPORTED_GET_TIME				0x0001
#define EFI_RT_SUPPORTED_SET_TIME				0x0002
#define EFI_RT_SUPPORTED_GET_WAKEUP_TIME			0x0004
#define EFI_RT_SUPPORTED_SET_WAKEUP_TIME			0x0008
#define EFI_RT_SUPPORTED_GET_VARIABLE				0x0010
#define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME			0x0020
#define EFI_RT_SUPPORTED_SET_VARIABLE				0x0040
#define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP		0x0080
#define EFI_RT_SUPPORTED_CONVERT_POINTER			0x0100
#define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT		0x0200
#define EFI_RT_SUPPORTED_RESET_SYSTEM				0x0400
#define EFI_RT_SUPPORTED_UPDATE_CAPSULE				0x0800
#define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES		0x1000
#define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO			0x2000

#define EFI_RT_SUPPORTED_ALL					0x3fff

#define EFI_RT_SUPPORTED_TIME_SERVICES				0x0003
#define EFI_RT_SUPPORTED_WAKEUP_SERVICES			0x000c
#define EFI_RT_SUPPORTED_VARIABLE_SERVICES			0x0070

extern struct mm_struct efi_mm;

static inline int
efi_guidcmp (efi_guid_t left, efi_guid_t right)
{
	return memcmp(&left, &right, sizeof (efi_guid_t));
}

static inline char *
efi_guid_to_str(efi_guid_t *guid, char *out)
{
	sprintf(out, "%pUl", guid->b);
        return out;
}

extern void efi_init (void);
extern void efi_earlycon_reprobe(void);
#ifdef CONFIG_EFI
extern void efi_enter_virtual_mode (void);	/* switch EFI to virtual mode, if possible */
#else
static inline void efi_enter_virtual_mode (void) {}
#endif
#ifdef CONFIG_X86
extern efi_status_t efi_query_variable_store(u32 attributes,
					     unsigned long size,
					     bool nonblocking);
#else

static inline efi_status_t efi_query_variable_store(u32 attributes,
						    unsigned long size,
						    bool nonblocking)
{
	return EFI_SUCCESS;
}
#endif

extern int __init __efi_memmap_init(struct efi_memory_map_data *data);
extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
extern void __init efi_memmap_unmap(void);

#ifdef CONFIG_EFI_ESRT
extern void __init efi_esrt_init(void);
#else
static inline void efi_esrt_init(void) { }
#endif
extern int efi_config_parse_tables(const efi_config_table_t *config_tables,
				   int count,
				   const efi_config_table_type_t *arch_tables);
extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr);
extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
				     unsigned long fw_vendor);
extern u64 efi_get_iobase (void);
extern int efi_mem_type(unsigned long phys_addr);
extern u64 efi_mem_attributes (unsigned long phys_addr);
extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
extern int __init efi_uart_console_only (void);
extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
extern int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
extern void efi_mem_reserve(phys_addr_t addr, u64 size);
extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
extern void efi_initialize_iomem_resources(struct resource *code_resource,
		struct resource *data_resource, struct resource *bss_resource);
extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);
extern struct kobject *efi_kobj;

extern int efi_reboot_quirk_mode;
extern bool efi_poweroff_required(void);

extern unsigned long efi_mem_attr_table;

/*
 * efi_memattr_perm_setter - arch specific callback function passed into
 *                           efi_memattr_apply_permissions() that updates the
 *                           mapping permissions described by the second
 *                           argument in the page tables referred to by the
 *                           first argument.
 */
typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool);

extern int efi_memattr_init(void);
extern int efi_memattr_apply_permissions(struct mm_struct *mm,
					 efi_memattr_perm_setter fn);

/*
 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
 * @map: the start of efi memmap
 * @desc_size: the size of space for each EFI memmap descriptor
 * @n: the index of efi memmap descriptor
 *
 * EFI boot service provides the GetMemoryMap() function to get a copy of the
 * current memory map which is an array of memory descriptors, each of
 * which describes a contiguous block of memory. It also gets the size of the
 * map, and the size of each descriptor, etc.
 *
 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
 * MUST use the returned size of the descriptor to find the start of each
 * efi_memory_memdesc_t in the memory map array. This should only be used
 * during bootup since for_each_efi_memory_desc_xxx() is available after the
 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
 */
#define efi_early_memdesc_ptr(map, desc_size, n)			\
	(efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))

/* Iterate through an efi_memory_map */
#define for_each_efi_memory_desc_in_map(m, md)				   \
	for ((md) = (m)->map;						   \
	     (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end;	   \
	     (md) = (void *)(md) + (m)->desc_size)

/**
 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
 * @md: the efi_memory_desc_t * iterator
 *
 * Once the loop finishes @md must not be accessed.
 */
#define for_each_efi_memory_desc(md) \
	for_each_efi_memory_desc_in_map(&efi.memmap, md)

/*
 * Format an EFI memory descriptor's type and attributes to a user-provided
 * character buffer, as per snprintf(), and return the buffer.
 */
char * __init efi_md_typeattr_format(char *buf, size_t size,
				     const efi_memory_desc_t *md);


typedef void (*efi_element_handler_t)(const char *source,
				      const void *element_data,
				      size_t element_size);
extern int __init parse_efi_signature_list(
	const char *source,
	const void *data, size_t size,
	efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));

/**
 * efi_range_is_wc - check the WC bit on an address range
 * @start: starting kvirt address
 * @len: length of range
 *
 * Consult the EFI memory map and make sure it's ok to set this range WC.
 * Returns true or false.
 */
static inline int efi_range_is_wc(unsigned long start, unsigned long len)
{
	unsigned long i;

	for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
		unsigned long paddr = __pa(start + i);
		if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
			return 0;
	}
	/* The range checked out */
	return 1;
}

#ifdef CONFIG_EFI_PCDP
extern int __init efi_setup_pcdp_console(char *);
#endif

/*
 * We play games with efi_enabled so that the compiler will, if
 * possible, remove EFI-related code altogether.
 */
#define EFI_BOOT		0	/* Were we booted from EFI? */
#define EFI_CONFIG_TABLES	2	/* Can we use EFI config tables? */
#define EFI_RUNTIME_SERVICES	3	/* Can we use runtime services? */
#define EFI_MEMMAP		4	/* Can we use EFI memory map? */
#define EFI_64BIT		5	/* Is the firmware 64-bit? */
#define EFI_PARAVIRT		6	/* Access is via a paravirt interface */
#define EFI_ARCH_1		7	/* First arch-specific bit */
#define EFI_DBG			8	/* Print additional debug info at runtime */
#define EFI_NX_PE_DATA		9	/* Can runtime data regions be mapped non-executable? */
#define EFI_MEM_ATTR		10	/* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
#define EFI_MEM_NO_SOFT_RESERVE	11	/* Is the kernel configured to ignore soft reservations? */
#define EFI_PRESERVE_BS_REGIONS	12	/* Are EFI boot-services memory segments available? */

#ifdef CONFIG_EFI
/*
 * Test whether the above EFI_* bits are enabled.
 */
static inline bool efi_enabled(int feature)
{
	return test_bit(feature, &efi.flags) != 0;
}
extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);

bool __pure __efi_soft_reserve_enabled(void);

static inline bool __pure efi_soft_reserve_enabled(void)
{
	return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
		&& __efi_soft_reserve_enabled();
}

static inline bool efi_rt_services_supported(unsigned int mask)
{
	return (efi.runtime_supported_mask & mask) == mask;
}
extern void efi_find_mirror(void);
#else
static inline bool efi_enabled(int feature)
{
	return false;
}
static inline void
efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}

static inline bool efi_soft_reserve_enabled(void)
{
	return false;
}

static inline bool efi_rt_services_supported(unsigned int mask)
{
	return false;
}

static inline void efi_find_mirror(void) {}
#endif

extern int efi_status_to_err(efi_status_t status);

/*
 * Variable Attributes
 */
#define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
#define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
#define EFI_VARIABLE_APPEND_WRITE	0x0000000000000040

#define EFI_VARIABLE_MASK	(EFI_VARIABLE_NON_VOLATILE | \
				EFI_VARIABLE_BOOTSERVICE_ACCESS | \
				EFI_VARIABLE_RUNTIME_ACCESS | \
				EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
				EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
				EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
				EFI_VARIABLE_APPEND_WRITE)
/*
 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
 * not including trailing NUL
 */
#define EFI_VARIABLE_GUID_LEN	UUID_STRING_LEN

/*
 * EFI Device Path information
 */
#define EFI_DEV_HW			0x01
#define  EFI_DEV_PCI				 1
#define  EFI_DEV_PCCARD				 2
#define  EFI_DEV_MEM_MAPPED			 3
#define  EFI_DEV_VENDOR				 4
#define  EFI_DEV_CONTROLLER			 5
#define EFI_DEV_ACPI			0x02
#define   EFI_DEV_BASIC_ACPI			 1
#define   EFI_DEV_EXPANDED_ACPI			 2
#define EFI_DEV_MSG			0x03
#define   EFI_DEV_MSG_ATAPI			 1
#define   EFI_DEV_MSG_SCSI			 2
#define   EFI_DEV_MSG_FC			 3
#define   EFI_DEV_MSG_1394			 4
#define   EFI_DEV_MSG_USB			 5
#define   EFI_DEV_MSG_USB_CLASS			15
#define   EFI_DEV_MSG_I20			 6
#define   EFI_DEV_MSG_MAC			11
#define   EFI_DEV_MSG_IPV4			12
#define   EFI_DEV_MSG_IPV6			13
#define   EFI_DEV_MSG_INFINIBAND		 9
#define   EFI_DEV_MSG_UART			14
#define   EFI_DEV_MSG_VENDOR			10
#define EFI_DEV_MEDIA			0x04
#define   EFI_DEV_MEDIA_HARD_DRIVE		 1
#define   EFI_DEV_MEDIA_CDROM			 2
#define   EFI_DEV_MEDIA_VENDOR			 3
#define   EFI_DEV_MEDIA_FILE			 4
#define   EFI_DEV_MEDIA_PROTOCOL		 5
#define   EFI_DEV_MEDIA_REL_OFFSET		 8
#define EFI_DEV_BIOS_BOOT		0x05
#define EFI_DEV_END_PATH		0x7F
#define EFI_DEV_END_PATH2		0xFF
#define   EFI_DEV_END_INSTANCE			0x01
#define   EFI_DEV_END_ENTIRE			0xFF

struct efi_generic_dev_path {
	u8				type;
	u8				sub_type;
	u16				length;
} __packed;

struct efi_acpi_dev_path {
	struct efi_generic_dev_path	header;
	u32				hid;
	u32				uid;
} __packed;

struct efi_pci_dev_path {
	struct efi_generic_dev_path	header;
	u8				fn;
	u8				dev;
} __packed;

struct efi_vendor_dev_path {
	struct efi_generic_dev_path	header;
	efi_guid_t			vendorguid;
	u8				vendordata[];
} __packed;

struct efi_rel_offset_dev_path {
	struct efi_generic_dev_path	header;
	u32				reserved;
	u64				starting_offset;
	u64				ending_offset;
} __packed;

struct efi_mem_mapped_dev_path {
	struct efi_generic_dev_path	header;
	u32				memory_type;
	u64				starting_addr;
	u64				ending_addr;
} __packed;

struct efi_file_path_dev_path {
	struct efi_generic_dev_path	header;
	efi_char16_t			filename[];
} __packed;

struct efi_dev_path {
	union {
		struct efi_generic_dev_path	header;
		struct efi_acpi_dev_path	acpi;
		struct efi_pci_dev_path		pci;
		struct efi_vendor_dev_path	vendor;
		struct efi_rel_offset_dev_path	rel_offset;
	};
} __packed;

struct device *efi_get_device_by_path(const struct efi_dev_path **node,
				      size_t *len);

static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
{
	*npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
	*addr &= PAGE_MASK;
}

/*
 * EFI Variable support.
 *
 * Different firmware drivers can expose their EFI-like variables using
 * the following.
 */

struct efivar_operations {
	efi_get_variable_t *get_variable;
	efi_get_next_variable_t *get_next_variable;
	efi_set_variable_t *set_variable;
	efi_set_variable_t *set_variable_nonblocking;
	efi_query_variable_store_t *query_variable_store;
	efi_query_variable_info_t *query_variable_info;
};

struct efivars {
	struct kset *kset;
	const struct efivar_operations *ops;
};

#ifdef CONFIG_X86
u64 __attribute_const__ efivar_reserved_space(void);
#else
static inline u64 efivar_reserved_space(void) { return 0; }
#endif

/*
 * The maximum size of VariableName + Data = 1024
 * Therefore, it's reasonable to save that much
 * space in each part of the structure,
 * and we use a page for reading/writing.
 */

#define EFI_VAR_NAME_LEN	1024

int efivars_register(struct efivars *efivars,
		     const struct efivar_operations *ops);
int efivars_unregister(struct efivars *efivars);

#ifdef CONFIG_EFI
bool efivar_is_available(void);
#else
static inline bool efivar_is_available(void) { return false; }
#endif

bool efivar_supports_writes(void);

int efivar_lock(void);
int efivar_trylock(void);
void efivar_unlock(void);

efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor,
				 u32 *attr, unsigned long *size, void *data);

efi_status_t efivar_get_next_variable(unsigned long *name_size,
				      efi_char16_t *name, efi_guid_t *vendor);

efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor,
					u32 attr, unsigned long data_size,
					void *data, bool nonblocking);

efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor,
				 u32 attr, unsigned long data_size, void *data);

efi_status_t efivar_query_variable_info(u32 attr, u64 *storage_space,
					u64 *remaining_space,
					u64 *max_variable_size);

#if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER)
extern bool efi_capsule_pending(int *reset_type);

extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
				 size_t size, int *reset);

extern int efi_capsule_update(efi_capsule_header_t *capsule,
			      phys_addr_t *pages);
#else
static inline bool efi_capsule_pending(int *reset_type) { return false; }
#endif

#ifdef CONFIG_EFI
extern bool efi_runtime_disabled(void);
#else
static inline bool efi_runtime_disabled(void) { return true; }
#endif

extern void efi_call_virt_check_flags(unsigned long flags, const void *caller);
extern unsigned long efi_call_virt_save_flags(void);

enum efi_secureboot_mode {
	efi_secureboot_mode_unset,
	efi_secureboot_mode_unknown,
	efi_secureboot_mode_disabled,
	efi_secureboot_mode_enabled,
};

static inline
enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
{
	u8 secboot, setupmode = 0;
	efi_status_t status;
	unsigned long size;

	size = sizeof(secboot);
	status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
			 &secboot);
	if (status == EFI_NOT_FOUND)
		return efi_secureboot_mode_disabled;
	if (status != EFI_SUCCESS)
		return efi_secureboot_mode_unknown;

	size = sizeof(setupmode);
	get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
	if (secboot == 0 || setupmode == 1)
		return efi_secureboot_mode_disabled;
	return efi_secureboot_mode_enabled;
}

#ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
void efi_check_for_embedded_firmwares(void);
#else
static inline void efi_check_for_embedded_firmwares(void) { }
#endif

#define arch_efi_call_virt(p, f, args...)	((p)->f(args))

/*
 * Arch code must implement the following three routines:
 *
 *  * arch_efi_call_virt_setup()
 *
 *    Sets up the environment for the call (e.g. switching page tables,
 *    allowing kernel-mode use of floating point, if required).
 *
 *  * arch_efi_call_virt()
 *
 *    Performs the call. This routine takes a variable number of arguments so
 *    it must be implemented as a variadic preprocessor macro.
 *
 *  * arch_efi_call_virt_teardown()
 *
 *    Restores the usual kernel environment once the call has returned.
 */

#define efi_call_virt_pointer(p, f, args...)				\
({									\
	typeof((p)->f(args)) __s;					\
	unsigned long __flags;						\
									\
	arch_efi_call_virt_setup();					\
									\
	__flags = efi_call_virt_save_flags();				\
	__s = arch_efi_call_virt(p, f, args);				\
	efi_call_virt_check_flags(__flags, NULL);			\
									\
	arch_efi_call_virt_teardown();					\
									\
	__s;								\
})

#define EFI_RANDOM_SEED_SIZE		32U // BLAKE2S_HASH_SIZE

struct linux_efi_random_seed {
	u32	size;
	u8	bits[];
};

struct linux_efi_tpm_eventlog {
	u32	size;
	u32	final_events_preboot_size;
	u8	version;
	u8	log[];
};

extern int efi_tpm_eventlog_init(void);

struct efi_tcg2_final_events_table {
	u64 version;
	u64 nr_events;
	u8 events[];
};
extern int efi_tpm_final_log_size;

extern unsigned long rci2_table_phys;

efi_status_t
efi_call_acpi_prm_handler(efi_status_t (__efiapi *handler_addr)(u64, void *),
			  u64 param_buffer_addr, void *context);

/*
 * efi_runtime_service() function identifiers.
 * "NONE" is used by efi_recover_from_page_fault() to check if the page
 * fault happened while executing an efi runtime service.
 */
enum efi_rts_ids {
	EFI_NONE,
	EFI_GET_TIME,
	EFI_SET_TIME,
	EFI_GET_WAKEUP_TIME,
	EFI_SET_WAKEUP_TIME,
	EFI_GET_VARIABLE,
	EFI_GET_NEXT_VARIABLE,
	EFI_SET_VARIABLE,
	EFI_QUERY_VARIABLE_INFO,
	EFI_GET_NEXT_HIGH_MONO_COUNT,
	EFI_RESET_SYSTEM,
	EFI_UPDATE_CAPSULE,
	EFI_QUERY_CAPSULE_CAPS,
	EFI_ACPI_PRM_HANDLER,
};

union efi_rts_args;

/*
 * efi_runtime_work:	Details of EFI Runtime Service work
 * @args:		Pointer to union describing the arguments
 * @status:		Status of executing EFI Runtime Service
 * @efi_rts_id:		EFI Runtime Service function identifier
 * @efi_rts_comp:	Struct used for handling completions
 * @caller:		The caller of the runtime service
 */
struct efi_runtime_work {
	union efi_rts_args	*args;
	efi_status_t		status;
	struct work_struct	work;
	enum efi_rts_ids	efi_rts_id;
	struct completion	efi_rts_comp;
	const void		*caller;
};

extern struct efi_runtime_work efi_rts_work;

/* Workqueue to queue EFI Runtime Services */
extern struct workqueue_struct *efi_rts_wq;

struct linux_efi_memreserve {
	int		size;			// allocated size of the array
	atomic_t	count;			// number of entries used
	phys_addr_t	next;			// pa of next struct instance
	struct {
		phys_addr_t	base;
		phys_addr_t	size;
	} entry[];
};

#define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
	/ sizeof_field(struct linux_efi_memreserve, entry[0]))

void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);

char *efi_systab_show_arch(char *str);

/*
 * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided
 * to the kernel by an EFI boot loader. The table contains a packed
 * sequence of these entries, one for each named MOK variable.
 * The sequence is terminated by an entry with a completely NULL
 * name and 0 data size.
 */
struct efi_mokvar_table_entry {
	char name[256];
	u64 data_size;
	u8 data[];
} __attribute((packed));

#ifdef CONFIG_LOAD_UEFI_KEYS
extern void __init efi_mokvar_table_init(void);
extern struct efi_mokvar_table_entry *efi_mokvar_entry_next(
			struct efi_mokvar_table_entry **mokvar_entry);
extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name);
#else
static inline void efi_mokvar_table_init(void) { }
static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next(
			struct efi_mokvar_table_entry **mokvar_entry)
{
	return NULL;
}
static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find(
			const char *name)
{
	return NULL;
}
#endif

extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);

struct linux_efi_coco_secret_area {
	u64	base_pa;
	u64	size;
};

struct linux_efi_initrd {
	unsigned long	base;
	unsigned long	size;
};

/* Header of a populated EFI secret area */
#define EFI_SECRET_TABLE_HEADER_GUID	EFI_GUID(0x1e74f542, 0x71dd, 0x4d66,  0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)

bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table);

static inline
bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
{
	if (!IS_ENABLED(CONFIG_XEN_EFI))
		return true;
	return xen_efi_config_table_is_usable(guid, table);
}

umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n);

#endif /* _LINUX_EFI_H */