summaryrefslogtreecommitdiff
path: root/drivers/firmware/efi/libstub/efistub.h
blob: b50a6c67d9bd23da5d55127e25bc658b76309931 (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
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
#define _DRIVERS_FIRMWARE_EFI_EFISTUB_H

#include <linux/compiler.h>
#include <linux/efi.h>
#include <linux/kernel.h>
#include <linux/kern_levels.h>
#include <linux/types.h>
#include <asm/efi.h>

/*
 * __init annotations should not be used in the EFI stub, since the code is
 * either included in the decompressor (x86, ARM) where they have no effect,
 * or the whole stub is __init annotated at the section level (arm64), by
 * renaming the sections, in which case the __init annotation will be
 * redundant, and will result in section names like .init.init.text, and our
 * linker script does not expect that.
 */
#undef __init

/*
 * Allow the platform to override the allocation granularity: this allows
 * systems that have the capability to run with a larger page size to deal
 * with the allocations for initrd and fdt more efficiently.
 */
#ifndef EFI_ALLOC_ALIGN
#define EFI_ALLOC_ALIGN		EFI_PAGE_SIZE
#endif

extern bool efi_nochunk;
extern bool efi_nokaslr;
extern bool efi_noinitrd;
extern int efi_loglevel;
extern bool efi_novamap;

extern const efi_system_table_t *efi_system_table;

efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
				   efi_system_table_t *sys_table_arg);

#ifndef ARCH_HAS_EFISTUB_WRAPPERS

#define efi_is_native()		(true)
#define efi_bs_call(func, ...)	efi_system_table->boottime->func(__VA_ARGS__)
#define efi_rt_call(func, ...)	efi_system_table->runtime->func(__VA_ARGS__)
#define efi_table_attr(inst, attr)	(inst->attr)
#define efi_call_proto(inst, func, ...) inst->func(inst, ##__VA_ARGS__)

#endif

#define efi_info(fmt, ...) \
	efi_printk(KERN_INFO fmt, ##__VA_ARGS__)
#define efi_warn(fmt, ...) \
	efi_printk(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__)
#define efi_err(fmt, ...) \
	efi_printk(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)
#define efi_debug(fmt, ...) \
	efi_printk(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)

#define efi_printk_once(fmt, ...) 		\
({						\
	static bool __print_once;		\
	bool __ret_print_once = !__print_once;	\
						\
	if (!__print_once) {			\
		__print_once = true;		\
		efi_printk(fmt, ##__VA_ARGS__);	\
	}					\
	__ret_print_once;			\
})

#define efi_info_once(fmt, ...) \
	efi_printk_once(KERN_INFO fmt, ##__VA_ARGS__)
#define efi_warn_once(fmt, ...) \
	efi_printk_once(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__)
#define efi_err_once(fmt, ...) \
	efi_printk_once(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)
#define efi_debug_once(fmt, ...) \
	efi_printk_once(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)

/* Helper macros for the usual case of using simple C variables: */
#ifndef fdt_setprop_inplace_var
#define fdt_setprop_inplace_var(fdt, node_offset, name, var) \
	fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var))
#endif

#ifndef fdt_setprop_var
#define fdt_setprop_var(fdt, node_offset, name, var) \
	fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var))
#endif

#define get_efi_var(name, vendor, ...)				\
	efi_rt_call(get_variable, (efi_char16_t *)(name),	\
		    (efi_guid_t *)(vendor), __VA_ARGS__)

#define set_efi_var(name, vendor, ...)				\
	efi_rt_call(set_variable, (efi_char16_t *)(name),	\
		    (efi_guid_t *)(vendor), __VA_ARGS__)

#define efi_get_handle_at(array, idx)					\
	(efi_is_native() ? (array)[idx] 				\
		: (efi_handle_t)(unsigned long)((u32 *)(array))[idx])

#define efi_get_handle_num(size)					\
	((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32)))

#define for_each_efi_handle(handle, array, size, i)			\
	for (i = 0;							\
	     i < efi_get_handle_num(size) &&				\
		((handle = efi_get_handle_at((array), i)) || true);	\
	     i++)

static inline
void efi_set_u64_split(u64 data, u32 *lo, u32 *hi)
{
	*lo = lower_32_bits(data);
	*hi = upper_32_bits(data);
}

/*
 * Allocation types for calls to boottime->allocate_pages.
 */
#define EFI_ALLOCATE_ANY_PAGES		0
#define EFI_ALLOCATE_MAX_ADDRESS	1
#define EFI_ALLOCATE_ADDRESS		2
#define EFI_MAX_ALLOCATE_TYPE		3

/*
 * The type of search to perform when calling boottime->locate_handle
 */
#define EFI_LOCATE_ALL_HANDLES			0
#define EFI_LOCATE_BY_REGISTER_NOTIFY		1
#define EFI_LOCATE_BY_PROTOCOL			2

/*
 * boottime->stall takes the time period in microseconds
 */
#define EFI_USEC_PER_SEC		1000000

/*
 * boottime->set_timer takes the time in 100ns units
 */
#define EFI_100NSEC_PER_USEC	((u64)10)

/*
 * An efi_boot_memmap is used by efi_get_memory_map() to return the
 * EFI memory map in a dynamically allocated buffer.
 *
 * The buffer allocated for the EFI memory map includes extra room for
 * a minimum of EFI_MMAP_NR_SLACK_SLOTS additional EFI memory descriptors.
 * This facilitates the reuse of the EFI memory map buffer when a second
 * call to ExitBootServices() is needed because of intervening changes to
 * the EFI memory map. Other related structures, e.g. x86 e820ext, need
 * to factor in this headroom requirement as well.
 */
#define EFI_MMAP_NR_SLACK_SLOTS	8

struct efi_boot_memmap {
	efi_memory_desc_t	**map;
	unsigned long		*map_size;
	unsigned long		*desc_size;
	u32			*desc_ver;
	unsigned long		*key_ptr;
	unsigned long		*buff_size;
};

typedef struct efi_generic_dev_path efi_device_path_protocol_t;

typedef void *efi_event_t;
/* Note that notifications won't work in mixed mode */
typedef void (__efiapi *efi_event_notify_t)(efi_event_t, void *);

#define EFI_EVT_TIMER		0x80000000U
#define EFI_EVT_RUNTIME		0x40000000U
#define EFI_EVT_NOTIFY_WAIT	0x00000100U
#define EFI_EVT_NOTIFY_SIGNAL	0x00000200U

/**
 * efi_set_event_at() - add event to events array
 *
 * @events:	array of UEFI events
 * @ids:	index where to put the event in the array
 * @event:	event to add to the aray
 *
 * boottime->wait_for_event() takes an array of events as input.
 * Provide a helper to set it up correctly for mixed mode.
 */
static inline
void efi_set_event_at(efi_event_t *events, size_t idx, efi_event_t event)
{
	if (efi_is_native())
		events[idx] = event;
	else
		((u32 *)events)[idx] = (u32)(unsigned long)event;
}

#define EFI_TPL_APPLICATION	4
#define EFI_TPL_CALLBACK	8
#define EFI_TPL_NOTIFY		16
#define EFI_TPL_HIGH_LEVEL	31

typedef enum {
	EfiTimerCancel,
	EfiTimerPeriodic,
	EfiTimerRelative
} EFI_TIMER_DELAY;

/*
 * EFI Boot Services table
 */
union efi_boot_services {
	struct {
		efi_table_hdr_t hdr;
		void *raise_tpl;
		void *restore_tpl;
		efi_status_t (__efiapi *allocate_pages)(int, int, unsigned long,
							efi_physical_addr_t *);
		efi_status_t (__efiapi *free_pages)(efi_physical_addr_t,
						    unsigned long);
		efi_status_t (__efiapi *get_memory_map)(unsigned long *, void *,
							unsigned long *,
							unsigned long *, u32 *);
		efi_status_t (__efiapi *allocate_pool)(int, unsigned long,
						       void **);
		efi_status_t (__efiapi *free_pool)(void *);
		efi_status_t (__efiapi *create_event)(u32, unsigned long,
						      efi_event_notify_t, void *,
						      efi_event_t *);
		efi_status_t (__efiapi *set_timer)(efi_event_t,
						  EFI_TIMER_DELAY, u64);
		efi_status_t (__efiapi *wait_for_event)(unsigned long,
							efi_event_t *,
							unsigned long *);
		void *signal_event;
		efi_status_t (__efiapi *close_event)(efi_event_t);
		void *check_event;
		void *install_protocol_interface;
		void *reinstall_protocol_interface;
		void *uninstall_protocol_interface;
		efi_status_t (__efiapi *handle_protocol)(efi_handle_t,
							 efi_guid_t *, void **);
		void *__reserved;
		void *register_protocol_notify;
		efi_status_t (__efiapi *locate_handle)(int, efi_guid_t *,
						       void *, unsigned long *,
						       efi_handle_t *);
		efi_status_t (__efiapi *locate_device_path)(efi_guid_t *,
							    efi_device_path_protocol_t **,
							    efi_handle_t *);
		efi_status_t (__efiapi *install_configuration_table)(efi_guid_t *,
								     void *);
		void *load_image;
		void *start_image;
		efi_status_t __noreturn (__efiapi *exit)(efi_handle_t,
							 efi_status_t,
							 unsigned long,
							 efi_char16_t *);
		void *unload_image;
		efi_status_t (__efiapi *exit_boot_services)(efi_handle_t,
							    unsigned long);
		void *get_next_monotonic_count;
		efi_status_t (__efiapi *stall)(unsigned long);
		void *set_watchdog_timer;
		void *connect_controller;
		efi_status_t (__efiapi *disconnect_controller)(efi_handle_t,
							       efi_handle_t,
							       efi_handle_t);
		void *open_protocol;
		void *close_protocol;
		void *open_protocol_information;
		void *protocols_per_handle;
		void *locate_handle_buffer;
		efi_status_t (__efiapi *locate_protocol)(efi_guid_t *, void *,
							 void **);
		void *install_multiple_protocol_interfaces;
		void *uninstall_multiple_protocol_interfaces;
		void *calculate_crc32;
		void *copy_mem;
		void *set_mem;
		void *create_event_ex;
	};
	struct {
		efi_table_hdr_t hdr;
		u32 raise_tpl;
		u32 restore_tpl;
		u32 allocate_pages;
		u32 free_pages;
		u32 get_memory_map;
		u32 allocate_pool;
		u32 free_pool;
		u32 create_event;
		u32 set_timer;
		u32 wait_for_event;
		u32 signal_event;
		u32 close_event;
		u32 check_event;
		u32 install_protocol_interface;
		u32 reinstall_protocol_interface;
		u32 uninstall_protocol_interface;
		u32 handle_protocol;
		u32 __reserved;
		u32 register_protocol_notify;
		u32 locate_handle;
		u32 locate_device_path;
		u32 install_configuration_table;
		u32 load_image;
		u32 start_image;
		u32 exit;
		u32 unload_image;
		u32 exit_boot_services;
		u32 get_next_monotonic_count;
		u32 stall;
		u32 set_watchdog_timer;
		u32 connect_controller;
		u32 disconnect_controller;
		u32 open_protocol;
		u32 close_protocol;
		u32 open_protocol_information;
		u32 protocols_per_handle;
		u32 locate_handle_buffer;
		u32 locate_protocol;
		u32 install_multiple_protocol_interfaces;
		u32 uninstall_multiple_protocol_interfaces;
		u32 calculate_crc32;
		u32 copy_mem;
		u32 set_mem;
		u32 create_event_ex;
	} mixed_mode;
};

typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t;

union efi_uga_draw_protocol {
	struct {
		efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *,
						  u32*, u32*, u32*, u32*);
		void *set_mode;
		void *blt;
	};
	struct {
		u32 get_mode;
		u32 set_mode;
		u32 blt;
	} mixed_mode;
};

typedef struct {
	u16 scan_code;
	efi_char16_t unicode_char;
} efi_input_key_t;

union efi_simple_text_input_protocol {
	struct {
		void *reset;
		efi_status_t (__efiapi *read_keystroke)(efi_simple_text_input_protocol_t *,
							efi_input_key_t *);
		efi_event_t wait_for_key;
	};
	struct {
		u32 reset;
		u32 read_keystroke;
		u32 wait_for_key;
	} mixed_mode;
};

efi_status_t efi_wait_for_key(unsigned long usec, efi_input_key_t *key);

union efi_simple_text_output_protocol {
	struct {
		void *reset;
		efi_status_t (__efiapi *output_string)(efi_simple_text_output_protocol_t *,
						       efi_char16_t *);
		void *test_string;
	};
	struct {
		u32 reset;
		u32 output_string;
		u32 test_string;
	} mixed_mode;
};

#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR		0
#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR		1
#define PIXEL_BIT_MASK					2
#define PIXEL_BLT_ONLY					3
#define PIXEL_FORMAT_MAX				4

typedef struct {
	u32 red_mask;
	u32 green_mask;
	u32 blue_mask;
	u32 reserved_mask;
} efi_pixel_bitmask_t;

typedef struct {
	u32 version;
	u32 horizontal_resolution;
	u32 vertical_resolution;
	int pixel_format;
	efi_pixel_bitmask_t pixel_information;
	u32 pixels_per_scan_line;
} efi_graphics_output_mode_info_t;

typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t;

union efi_graphics_output_protocol_mode {
	struct {
		u32 max_mode;
		u32 mode;
		efi_graphics_output_mode_info_t *info;
		unsigned long size_of_info;
		efi_physical_addr_t frame_buffer_base;
		unsigned long frame_buffer_size;
	};
	struct {
		u32 max_mode;
		u32 mode;
		u32 info;
		u32 size_of_info;
		u64 frame_buffer_base;
		u32 frame_buffer_size;
	} mixed_mode;
};

typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t;

union efi_graphics_output_protocol {
	struct {
		efi_status_t (__efiapi *query_mode)(efi_graphics_output_protocol_t *,
						    u32, unsigned long *,
						    efi_graphics_output_mode_info_t **);
		efi_status_t (__efiapi *set_mode)  (efi_graphics_output_protocol_t *, u32);
		void *blt;
		efi_graphics_output_protocol_mode_t *mode;
	};
	struct {
		u32 query_mode;
		u32 set_mode;
		u32 blt;
		u32 mode;
	} mixed_mode;
};

typedef union {
	struct {
		u32			revision;
		efi_handle_t		parent_handle;
		efi_system_table_t	*system_table;
		efi_handle_t		device_handle;
		void			*file_path;
		void			*reserved;
		u32			load_options_size;
		void			*load_options;
		void			*image_base;
		__aligned_u64		image_size;
		unsigned int		image_code_type;
		unsigned int		image_data_type;
		efi_status_t		(__efiapi *unload)(efi_handle_t image_handle);
	};
	struct {
		u32		revision;
		u32		parent_handle;
		u32		system_table;
		u32		device_handle;
		u32		file_path;
		u32		reserved;
		u32		load_options_size;
		u32		load_options;
		u32		image_base;
		__aligned_u64	image_size;
		u32		image_code_type;
		u32		image_data_type;
		u32		unload;
	} mixed_mode;
} efi_loaded_image_t;

typedef struct {
	u64			size;
	u64			file_size;
	u64			phys_size;
	efi_time_t		create_time;
	efi_time_t		last_access_time;
	efi_time_t		modification_time;
	__aligned_u64		attribute;
	efi_char16_t		filename[];
} efi_file_info_t;

typedef struct efi_file_protocol efi_file_protocol_t;

struct efi_file_protocol {
	u64		revision;
	efi_status_t	(__efiapi *open)	(efi_file_protocol_t *,
						 efi_file_protocol_t **,
						 efi_char16_t *, u64, u64);
	efi_status_t	(__efiapi *close)	(efi_file_protocol_t *);
	efi_status_t	(__efiapi *delete)	(efi_file_protocol_t *);
	efi_status_t	(__efiapi *read)	(efi_file_protocol_t *,
						 unsigned long *, void *);
	efi_status_t	(__efiapi *write)	(efi_file_protocol_t *,
						 unsigned long, void *);
	efi_status_t	(__efiapi *get_position)(efi_file_protocol_t *, u64 *);
	efi_status_t	(__efiapi *set_position)(efi_file_protocol_t *, u64);
	efi_status_t	(__efiapi *get_info)	(efi_file_protocol_t *,
						 efi_guid_t *, unsigned long *,
						 void *);
	efi_status_t	(__efiapi *set_info)	(efi_file_protocol_t *,
						 efi_guid_t *, unsigned long,
						 void *);
	efi_status_t	(__efiapi *flush)	(efi_file_protocol_t *);
};

typedef struct efi_simple_file_system_protocol efi_simple_file_system_protocol_t;

struct efi_simple_file_system_protocol {
	u64	revision;
	int	(__efiapi *open_volume)(efi_simple_file_system_protocol_t *,
					efi_file_protocol_t **);
};

#define EFI_FILE_MODE_READ	0x0000000000000001
#define EFI_FILE_MODE_WRITE	0x0000000000000002
#define EFI_FILE_MODE_CREATE	0x8000000000000000

typedef enum {
	EfiPciIoWidthUint8,
	EfiPciIoWidthUint16,
	EfiPciIoWidthUint32,
	EfiPciIoWidthUint64,
	EfiPciIoWidthFifoUint8,
	EfiPciIoWidthFifoUint16,
	EfiPciIoWidthFifoUint32,
	EfiPciIoWidthFifoUint64,
	EfiPciIoWidthFillUint8,
	EfiPciIoWidthFillUint16,
	EfiPciIoWidthFillUint32,
	EfiPciIoWidthFillUint64,
	EfiPciIoWidthMaximum
} EFI_PCI_IO_PROTOCOL_WIDTH;

typedef enum {
	EfiPciIoAttributeOperationGet,
	EfiPciIoAttributeOperationSet,
	EfiPciIoAttributeOperationEnable,
	EfiPciIoAttributeOperationDisable,
	EfiPciIoAttributeOperationSupported,
    EfiPciIoAttributeOperationMaximum
} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;

typedef struct {
	u32 read;
	u32 write;
} efi_pci_io_protocol_access_32_t;

typedef union efi_pci_io_protocol efi_pci_io_protocol_t;

typedef
efi_status_t (__efiapi *efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *,
						   EFI_PCI_IO_PROTOCOL_WIDTH,
						   u32 offset,
						   unsigned long count,
						   void *buffer);

typedef struct {
	void *read;
	void *write;
} efi_pci_io_protocol_access_t;

typedef struct {
	efi_pci_io_protocol_cfg_t read;
	efi_pci_io_protocol_cfg_t write;
} efi_pci_io_protocol_config_access_t;

union efi_pci_io_protocol {
	struct {
		void *poll_mem;
		void *poll_io;
		efi_pci_io_protocol_access_t mem;
		efi_pci_io_protocol_access_t io;
		efi_pci_io_protocol_config_access_t pci;
		void *copy_mem;
		void *map;
		void *unmap;
		void *allocate_buffer;
		void *free_buffer;
		void *flush;
		efi_status_t (__efiapi *get_location)(efi_pci_io_protocol_t *,
						      unsigned long *segment_nr,
						      unsigned long *bus_nr,
						      unsigned long *device_nr,
						      unsigned long *func_nr);
		void *attributes;
		void *get_bar_attributes;
		void *set_bar_attributes;
		uint64_t romsize;
		void *romimage;
	};
	struct {
		u32 poll_mem;
		u32 poll_io;
		efi_pci_io_protocol_access_32_t mem;
		efi_pci_io_protocol_access_32_t io;
		efi_pci_io_protocol_access_32_t pci;
		u32 copy_mem;
		u32 map;
		u32 unmap;
		u32 allocate_buffer;
		u32 free_buffer;
		u32 flush;
		u32 get_location;
		u32 attributes;
		u32 get_bar_attributes;
		u32 set_bar_attributes;
		u64 romsize;
		u32 romimage;
	} mixed_mode;
};

#define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000

struct efi_dev_path;

typedef union apple_properties_protocol apple_properties_protocol_t;

union apple_properties_protocol {
	struct {
		unsigned long version;
		efi_status_t (__efiapi *get)(apple_properties_protocol_t *,
					     struct efi_dev_path *,
					     efi_char16_t *, void *, u32 *);
		efi_status_t (__efiapi *set)(apple_properties_protocol_t *,
					     struct efi_dev_path *,
					     efi_char16_t *, void *, u32);
		efi_status_t (__efiapi *del)(apple_properties_protocol_t *,
					     struct efi_dev_path *,
					     efi_char16_t *);
		efi_status_t (__efiapi *get_all)(apple_properties_protocol_t *,
						 void *buffer, u32 *);
	};
	struct {
		u32 version;
		u32 get;
		u32 set;
		u32 del;
		u32 get_all;
	} mixed_mode;
};

typedef u32 efi_tcg2_event_log_format;

typedef union efi_tcg2_protocol efi_tcg2_protocol_t;

union efi_tcg2_protocol {
	struct {
		void *get_capability;
		efi_status_t (__efiapi *get_event_log)(efi_handle_t,
						       efi_tcg2_event_log_format,
						       efi_physical_addr_t *,
						       efi_physical_addr_t *,
						       efi_bool_t *);
		void *hash_log_extend_event;
		void *submit_command;
		void *get_active_pcr_banks;
		void *set_active_pcr_banks;
		void *get_result_of_set_active_pcr_banks;
	};
	struct {
		u32 get_capability;
		u32 get_event_log;
		u32 hash_log_extend_event;
		u32 submit_command;
		u32 get_active_pcr_banks;
		u32 set_active_pcr_banks;
		u32 get_result_of_set_active_pcr_banks;
	} mixed_mode;
};

typedef union efi_load_file_protocol efi_load_file_protocol_t;
typedef union efi_load_file_protocol efi_load_file2_protocol_t;

union efi_load_file_protocol {
	struct {
		efi_status_t (__efiapi *load_file)(efi_load_file_protocol_t *,
						   efi_device_path_protocol_t *,
						   bool, unsigned long *, void *);
	};
	struct {
		u32 load_file;
	} mixed_mode;
};

typedef struct {
	u32 attributes;
	u16 file_path_list_length;
	u8 variable_data[];
	// efi_char16_t description[];
	// efi_device_path_protocol_t file_path_list[];
	// u8 optional_data[];
} __packed efi_load_option_t;

#define EFI_LOAD_OPTION_ACTIVE		0x0001U
#define EFI_LOAD_OPTION_FORCE_RECONNECT	0x0002U
#define EFI_LOAD_OPTION_HIDDEN		0x0008U
#define EFI_LOAD_OPTION_CATEGORY	0x1f00U
#define   EFI_LOAD_OPTION_CATEGORY_BOOT	0x0000U
#define   EFI_LOAD_OPTION_CATEGORY_APP	0x0100U

#define EFI_LOAD_OPTION_BOOT_MASK \
	(EFI_LOAD_OPTION_ACTIVE|EFI_LOAD_OPTION_HIDDEN|EFI_LOAD_OPTION_CATEGORY)
#define EFI_LOAD_OPTION_MASK (EFI_LOAD_OPTION_FORCE_RECONNECT|EFI_LOAD_OPTION_BOOT_MASK)

typedef struct {
	u32 attributes;
	u16 file_path_list_length;
	const efi_char16_t *description;
	const efi_device_path_protocol_t *file_path_list;
	size_t optional_data_size;
	const void *optional_data;
} efi_load_option_unpacked_t;

void efi_pci_disable_bridge_busmaster(void);

typedef efi_status_t (*efi_exit_boot_map_processing)(
	struct efi_boot_memmap *map,
	void *priv);

efi_status_t efi_exit_boot_services(void *handle,
				    struct efi_boot_memmap *map,
				    void *priv,
				    efi_exit_boot_map_processing priv_func);

efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
					    unsigned long *new_fdt_addr,
					    u64 initrd_addr, u64 initrd_size,
					    char *cmdline_ptr,
					    unsigned long fdt_addr,
					    unsigned long fdt_size);

void *get_fdt(unsigned long *fdt_size);

void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
		     unsigned long desc_size, efi_memory_desc_t *runtime_map,
		     int *count);

efi_status_t efi_get_random_bytes(unsigned long size, u8 *out);

efi_status_t efi_random_alloc(unsigned long size, unsigned long align,
			      unsigned long *addr, unsigned long random_seed);

efi_status_t check_platform_features(void);

void *get_efi_config_table(efi_guid_t guid);

/* NOTE: These functions do not print a trailing newline after the string */
void efi_char16_puts(efi_char16_t *);
void efi_puts(const char *str);

__printf(1, 2) int efi_printk(char const *fmt, ...);

void efi_free(unsigned long size, unsigned long addr);

void efi_apply_loadoptions_quirk(const void **load_options, int *load_options_size);

char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len);

efi_status_t efi_get_memory_map(struct efi_boot_memmap *map);

efi_status_t efi_allocate_pages(unsigned long size, unsigned long *addr,
				unsigned long max);

efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr,
					unsigned long max, unsigned long align);

efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
				 unsigned long *addr, unsigned long min);

efi_status_t efi_relocate_kernel(unsigned long *image_addr,
				 unsigned long image_size,
				 unsigned long alloc_size,
				 unsigned long preferred_addr,
				 unsigned long alignment,
				 unsigned long min_addr);

efi_status_t efi_parse_options(char const *cmdline);

void efi_parse_option_graphics(char *option);

efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,
			   unsigned long size);

efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
				  const efi_char16_t *optstr,
				  int optstr_size,
				  unsigned long soft_limit,
				  unsigned long hard_limit,
				  unsigned long *load_addr,
				  unsigned long *load_size);


static inline efi_status_t efi_load_dtb(efi_loaded_image_t *image,
					unsigned long *load_addr,
					unsigned long *load_size)
{
	return handle_cmdline_files(image, L"dtb=", sizeof(L"dtb=") - 2,
				    ULONG_MAX, ULONG_MAX, load_addr, load_size);
}

efi_status_t efi_load_initrd(efi_loaded_image_t *image,
			     unsigned long *load_addr,
			     unsigned long *load_size,
			     unsigned long soft_limit,
			     unsigned long hard_limit);
/*
 * This function handles the architcture specific differences between arm and
 * arm64 regarding where the kernel image must be loaded and any memory that
 * must be reserved. On failure it is required to free all
 * all allocations it has made.
 */
efi_status_t handle_kernel_image(unsigned long *image_addr,
				 unsigned long *image_size,
				 unsigned long *reserve_addr,
				 unsigned long *reserve_size,
				 efi_loaded_image_t *image);

asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint,
					    unsigned long fdt_addr,
					    unsigned long fdt_size);

void efi_handle_post_ebs_state(void);

enum efi_secureboot_mode efi_get_secureboot(void);

#endif