summaryrefslogtreecommitdiff
path: root/drivers/firmware/efi/libstub/efistub.h
blob: cc90a748bcf0208a6a7c6cfc5b7815f2487dfe7f (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
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
#define _DRIVERS_FIRMWARE_EFI_EFISTUB_H

/* error code which can't be mistaken for valid address */
#define EFI_ERROR	(~0UL)

/*
 * __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

#ifdef CONFIG_ARM
#define __efistub_global	__section(.data)
#else
#define __efistub_global
#endif

extern bool __pure nochunk(void);
extern bool __pure nokaslr(void);
extern bool __pure noinitrd(void);
extern bool __pure is_quiet(void);
extern bool __pure novamap(void);

extern __pure efi_system_table_t  *efi_system_table(void);

#define pr_efi(msg)		do {			\
	if (!is_quiet()) efi_printk("EFI stub: "msg);	\
} while (0)

#define pr_efi_err(msg) efi_printk("EFI stub: ERROR: "msg)

/* 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++)

/*
 * 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

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;

/*
 * 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 *);
		void *create_event;
		void *set_timer;
		void *wait_for_event;
		void *signal_event;
		void *close_event;
		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;
		void *stall;
		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;
};

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 {
		void *query_mode;
		void *set_mode;
		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;
};

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);

void efi_char16_printk(efi_char16_t *);

efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
					    unsigned long *new_fdt_addr,
					    unsigned long max_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);

void efi_printk(char *str);

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

char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len,
			  unsigned long max_addr);

efi_status_t efi_get_memory_map(struct efi_boot_memmap *map);

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

static inline
efi_status_t efi_low_alloc(unsigned long size, unsigned long align,
			   unsigned long *addr)
{
	/*
	 * Don't allocate at 0x0. It will confuse code that
	 * checks pointers against NULL. Skip the first 8
	 * bytes so we start at a nice even number.
	 */
	return efi_low_alloc_above(size, align, addr, 0x8);
}

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

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);

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

efi_status_t efi_load_dtb(efi_loaded_image_t *image,
			  unsigned long *load_addr,
			  unsigned long *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);

efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr,
				      unsigned long *load_size,
				      unsigned long max);

#endif