summaryrefslogtreecommitdiff
path: root/include/efi_loader.h
blob: c2cae814b652eba95579ae344fa271cce1223068 (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
/* SPDX-License-Identifier: GPL-2.0+ */
/*
 *  EFI application loader
 *
 *  Copyright (c) 2016 Alexander Graf
 */

#ifndef _EFI_LOADER_H
#define _EFI_LOADER_H 1

#include <common.h>
#include <blk.h>
#include <log.h>
#include <part_efi.h>
#include <efi_api.h>
#include <image.h>
#include <pe.h>

struct blk_desc;

static inline int guidcmp(const void *g1, const void *g2)
{
	return memcmp(g1, g2, sizeof(efi_guid_t));
}

static inline void *guidcpy(void *dst, const void *src)
{
	return memcpy(dst, src, sizeof(efi_guid_t));
}

/* No need for efi loader support in SPL */
#if CONFIG_IS_ENABLED(EFI_LOADER)

#include <linux/list.h>
#include <linux/oid_registry.h>

/* Maximum number of configuration tables */
#define EFI_MAX_CONFIGURATION_TABLES 16

/* GUID used by the root node */
#define U_BOOT_GUID \
	EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
		 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
/* GUID used as host device on sandbox */
#define U_BOOT_HOST_DEV_GUID \
	EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
		 0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
/* GUID used as root for virtio devices */
#define U_BOOT_VIRTIO_DEV_GUID \
	EFI_GUID(0x63293792, 0xadf5, 0x9325, \
		 0xb9, 0x9f, 0x4e, 0x0e, 0x45, 0x5c, 0x1b, 0x1e)

/* Use internal device tree when starting UEFI application */
#define EFI_FDT_USE_INTERNAL NULL

/* Root node */
extern efi_handle_t efi_root;

/* EFI system partition */
extern struct efi_system_partition {
	enum if_type if_type;
	int devnum;
	u8 part;
} efi_system_partition;

int __efi_entry_check(void);
int __efi_exit_check(void);
const char *__efi_nesting(void);
const char *__efi_nesting_inc(void);
const char *__efi_nesting_dec(void);

/*
 * Enter the u-boot world from UEFI:
 */
#define EFI_ENTRY(format, ...) do { \
	assert(__efi_entry_check()); \
	debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
		__func__, ##__VA_ARGS__); \
	} while(0)

/*
 * Exit the u-boot world back to UEFI:
 */
#define EFI_EXIT(ret) ({ \
	typeof(ret) _r = ret; \
	debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
		__func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
	assert(__efi_exit_check()); \
	_r; \
	})

/*
 * Call non-void UEFI function from u-boot and retrieve return value:
 */
#define EFI_CALL(exp) ({ \
	debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
	assert(__efi_exit_check()); \
	typeof(exp) _r = exp; \
	assert(__efi_entry_check()); \
	debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
	      (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
	_r; \
})

/*
 * Call void UEFI function from u-boot:
 */
#define EFI_CALL_VOID(exp) do { \
	debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
	assert(__efi_exit_check()); \
	exp; \
	assert(__efi_entry_check()); \
	debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
	} while(0)

/*
 * Write an indented message with EFI prefix
 */
#define EFI_PRINT(format, ...) ({ \
	debug("%sEFI: " format, __efi_nesting(), \
		##__VA_ARGS__); \
	})

#ifdef CONFIG_SYS_CACHELINE_SIZE
#define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
#else
/* Just use the greatest cache flush alignment requirement I'm aware of */
#define EFI_CACHELINE_SIZE 128
#endif

/* Key identifying current memory map */
extern efi_uintn_t efi_memory_map_key;

extern struct efi_runtime_services efi_runtime_services;
extern struct efi_system_table systab;

extern struct efi_simple_text_output_protocol efi_con_out;
extern struct efi_simple_text_input_protocol efi_con_in;
extern struct efi_console_control_protocol efi_console_control;
extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
/* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
extern const struct efi_device_path_utilities_protocol
					efi_device_path_utilities;
/* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */
extern const struct efi_unicode_collation_protocol
					efi_unicode_collation_protocol;
/* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
extern const struct efi_unicode_collation_protocol
					efi_unicode_collation_protocol2;
extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
extern const struct efi_hii_config_access_protocol efi_hii_config_access;
extern const struct efi_hii_database_protocol efi_hii_database;
extern const struct efi_hii_string_protocol efi_hii_string;
extern const struct efi_rng_protocol efi_rng_protocol;

uint16_t *efi_dp_str(struct efi_device_path *dp);

/* GUID of the U-Boot root node */
extern const efi_guid_t efi_u_boot_guid;
#ifdef CONFIG_SANDBOX
/* GUID of U-Boot host device on sandbox */
extern const efi_guid_t efi_guid_host_dev;
#endif
/* GUID of the EFI_BLOCK_IO_PROTOCOL */
extern const efi_guid_t efi_block_io_guid;
extern const efi_guid_t efi_global_variable_guid;
extern const efi_guid_t efi_guid_console_control;
extern const efi_guid_t efi_guid_device_path;
/* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
extern const efi_guid_t efi_guid_driver_binding_protocol;
/* event group ExitBootServices() invoked */
extern const efi_guid_t efi_guid_event_group_exit_boot_services;
/* event group SetVirtualAddressMap() invoked */
extern const efi_guid_t efi_guid_event_group_virtual_address_change;
/* event group memory map changed */
extern const efi_guid_t efi_guid_event_group_memory_map_change;
/* event group boot manager about to boot */
extern const efi_guid_t efi_guid_event_group_ready_to_boot;
/* event group ResetSystem() invoked (before ExitBootServices) */
extern const efi_guid_t efi_guid_event_group_reset_system;
/* GUID of the device tree table */
extern const efi_guid_t efi_guid_fdt;
extern const efi_guid_t efi_guid_loaded_image;
extern const efi_guid_t efi_guid_loaded_image_device_path;
extern const efi_guid_t efi_guid_device_path_to_text_protocol;
extern const efi_guid_t efi_simple_file_system_protocol_guid;
extern const efi_guid_t efi_file_info_guid;
/* GUID for file system information */
extern const efi_guid_t efi_file_system_info_guid;
extern const efi_guid_t efi_guid_device_path_utilities_protocol;
/* GUID of the deprecated Unicode collation protocol */
extern const efi_guid_t efi_guid_unicode_collation_protocol;
/* GUID of the Unicode collation protocol */
extern const efi_guid_t efi_guid_unicode_collation_protocol2;
extern const efi_guid_t efi_guid_hii_config_routing_protocol;
extern const efi_guid_t efi_guid_hii_config_access_protocol;
extern const efi_guid_t efi_guid_hii_database_protocol;
extern const efi_guid_t efi_guid_hii_string_protocol;
/* GUIDs for authentication */
extern const efi_guid_t efi_guid_image_security_database;
extern const efi_guid_t efi_guid_sha256;
extern const efi_guid_t efi_guid_cert_x509;
extern const efi_guid_t efi_guid_cert_x509_sha256;
extern const efi_guid_t efi_guid_cert_type_pkcs7;

/* GUID of RNG protocol */
extern const efi_guid_t efi_guid_rng_protocol;

extern unsigned int __efi_runtime_start, __efi_runtime_stop;
extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;

/**
 * struct efi_open_protocol_info_item - open protocol info item
 *
 * When a protocol is opened a open protocol info entry is created.
 * These are maintained in a list.
 *
 * @link:	link to the list of open protocol info entries of a protocol
 * @info:	information about the opening of a protocol
 */
struct efi_open_protocol_info_item {
	struct list_head link;
	struct efi_open_protocol_info_entry info;
};

/**
 * struct efi_handler - single protocol interface of a handle
 *
 * When the UEFI payload wants to open a protocol on an object to get its
 * interface (usually a struct with callback functions), this struct maps the
 * protocol GUID to the respective protocol interface
 *
 * @link:		link to the list of protocols of a handle
 * @guid:		GUID of the protocol
 * @protocol_interface:	protocol interface
 * @open_infos		link to the list of open protocol info items
 */
struct efi_handler {
	struct list_head link;
	const efi_guid_t *guid;
	void *protocol_interface;
	struct list_head open_infos;
};

/**
 * enum efi_object_type - type of EFI object
 *
 * In UnloadImage we must be able to identify if the handle relates to a
 * started image.
 */
enum efi_object_type {
	EFI_OBJECT_TYPE_UNDEFINED = 0,
	EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
	EFI_OBJECT_TYPE_LOADED_IMAGE,
	EFI_OBJECT_TYPE_STARTED_IMAGE,
};

/**
 * struct efi_object - dereferenced EFI handle
 *
 * @link:	pointers to put the handle into a linked list
 * @protocols:	linked list with the protocol interfaces installed on this
 *		handle
 *
 * UEFI offers a flexible and expandable object model. The objects in the UEFI
 * API are devices, drivers, and loaded images. struct efi_object is our storage
 * structure for these objects.
 *
 * When including this structure into a larger structure always put it first so
 * that when deleting a handle the whole encompassing structure can be freed.
 *
 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
 * has been created for such pointers.
 */
struct efi_object {
	/* Every UEFI object is part of a global object list */
	struct list_head link;
	/* The list of protocols */
	struct list_head protocols;
	enum efi_object_type type;
};

enum efi_image_auth_status {
	EFI_IMAGE_AUTH_FAILED = 0,
	EFI_IMAGE_AUTH_PASSED,
};

/**
 * struct efi_loaded_image_obj - handle of a loaded image
 *
 * @header:		EFI object header
 * @exit_status:	exit status passed to Exit()
 * @exit_data_size:	exit data size passed to Exit()
 * @exit_data:		exit data passed to Exit()
 * @exit_jmp:		long jump buffer for returning form started image
 * @entry:		entry address of the relocated image
 */
struct efi_loaded_image_obj {
	struct efi_object header;
	efi_status_t exit_status;
	efi_uintn_t *exit_data_size;
	u16 **exit_data;
	struct jmp_buf_data exit_jmp;
	EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
				     struct efi_system_table *st);
	u16 image_type;
	enum efi_image_auth_status auth_status;
};

/**
 * struct efi_event
 *
 * @link:		Link to list of all events
 * @queue_link:		Link to the list of queued events
 * @type:		Type of event, see efi_create_event
 * @notify_tpl:		Task priority level of notifications
 * @nofify_function:	Function to call when the event is triggered
 * @notify_context:	Data to be passed to the notify function
 * @group:		Event group
 * @trigger_time:	Period of the timer
 * @trigger_next:	Next time to trigger the timer
 * @trigger_type:	Type of timer, see efi_set_timer
 * @is_signaled:	The event occurred. The event is in the signaled state.
 */
struct efi_event {
	struct list_head link;
	struct list_head queue_link;
	uint32_t type;
	efi_uintn_t notify_tpl;
	void (EFIAPI *notify_function)(struct efi_event *event, void *context);
	void *notify_context;
	const efi_guid_t *group;
	u64 trigger_next;
	u64 trigger_time;
	enum efi_timer_delay trigger_type;
	bool is_signaled;
};

/* This list contains all UEFI objects we know of */
extern struct list_head efi_obj_list;
/* List of all events */
extern struct list_head efi_events;

/**
 * struct efi_protocol_notification - handle for notified protocol
 *
 * When a protocol interface is installed for which an event was registered with
 * the RegisterProtocolNotify() service this structure is used to hold the
 * handle on which the protocol interface was installed.
 *
 * @link:	link to list of all handles notified for this event
 * @handle:	handle on which the notified protocol interface was installed
 */
struct efi_protocol_notification {
	struct list_head link;
	efi_handle_t handle;
};

/**
 * efi_register_notify_event - event registered by RegisterProtocolNotify()
 *
 * The address of this structure serves as registration value.
 *
 * @link:	link to list of all registered events
 * @event:	registered event. The same event may registered for multiple
 *		GUIDs.
 * @protocol:	protocol for which the event is registered
 * @handles:	linked list of all handles on which the notified protocol was
 *		installed
 */
struct efi_register_notify_event {
	struct list_head link;
	struct efi_event *event;
	efi_guid_t protocol;
	struct list_head handles;
};

/* List of all events registered by RegisterProtocolNotify() */
extern struct list_head efi_register_notify_events;

/* Initialize efi execution environment */
efi_status_t efi_init_obj_list(void);
/* Install device tree */
efi_status_t efi_install_fdt(void *fdt);
/* Run loaded UEFI image */
efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
/* Initialize variable services */
efi_status_t efi_init_variables(void);
/* Notify ExitBootServices() is called */
void efi_variables_boot_exit_notify(void);
/* Called by bootefi to initialize root node */
efi_status_t efi_root_node_register(void);
/* Called by bootefi to initialize runtime */
efi_status_t efi_initialize_system_table(void);
/* efi_runtime_detach() - detach unimplemented runtime functions */
void efi_runtime_detach(void);
/* Called by bootefi to make console interface available */
efi_status_t efi_console_register(void);
/* Called by bootefi to make all disk storage accessible as EFI objects */
efi_status_t efi_disk_register(void);
/* Create handles and protocols for the partitions of a block device */
int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
			       const char *if_typename, int diskid,
			       const char *pdevname);
/* Check if it is EFI system partition */
bool efi_disk_is_system_part(efi_handle_t handle);
/* Called by bootefi to make GOP (graphical) interface available */
efi_status_t efi_gop_register(void);
/* Called by bootefi to make the network interface available */
efi_status_t efi_net_register(void);
/* Called by bootefi to make the watchdog available */
efi_status_t efi_watchdog_register(void);
efi_status_t efi_initrd_register(void);
/* Called by bootefi to make SMBIOS tables available */
/**
 * efi_acpi_register() - write out ACPI tables
 *
 * Called by bootefi to make ACPI tables available
 *
 * @return 0 if OK, -ENOMEM if no memory is available for the tables
 */
efi_status_t efi_acpi_register(void);
/**
 * efi_smbios_register() - write out SMBIOS tables
 *
 * Called by bootefi to make SMBIOS tables available
 *
 * @return 0 if OK, -ENOMEM if no memory is available for the tables
 */
efi_status_t efi_smbios_register(void);

struct efi_simple_file_system_protocol *
efi_fs_from_path(struct efi_device_path *fp);

/* Called by networking code to memorize the dhcp ack package */
void efi_net_set_dhcp_ack(void *pkt, int len);
/* Called by efi_set_watchdog_timer to reset the timer */
efi_status_t efi_set_watchdog(unsigned long timeout);

/* Called from places to check whether a timer expired */
void efi_timer_check(void);
/* PE loader implementation */
efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
			 void *efi, size_t efi_size,
			 struct efi_loaded_image *loaded_image_info);
/* Called once to store the pristine gd pointer */
void efi_save_gd(void);
/* Special case handler for error/abort that just tries to dtrt to get
 * back to u-boot world */
void efi_restore_gd(void);
/* Call this to relocate the runtime section to an address space */
void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
/* Call this to set the current device name */
void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
/* Add a new object to the object list. */
void efi_add_handle(efi_handle_t obj);
/* Create handle */
efi_status_t efi_create_handle(efi_handle_t *handle);
/* Delete handle */
void efi_delete_handle(efi_handle_t obj);
/* Call this to validate a handle and find the EFI object for it */
struct efi_object *efi_search_obj(const efi_handle_t handle);
/* Load image */
efi_status_t EFIAPI efi_load_image(bool boot_policy,
				   efi_handle_t parent_image,
				   struct efi_device_path *file_path,
				   void *source_buffer,
				   efi_uintn_t source_size,
				   efi_handle_t *image_handle);
/* Start image */
efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
				    efi_uintn_t *exit_data_size,
				    u16 **exit_data);
/* Unload image */
efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
/* Find a protocol on a handle */
efi_status_t efi_search_protocol(const efi_handle_t handle,
				 const efi_guid_t *protocol_guid,
				 struct efi_handler **handler);
/* Install new protocol on a handle */
efi_status_t efi_add_protocol(const efi_handle_t handle,
			      const efi_guid_t *protocol,
			      void *protocol_interface);
/* Delete protocol from a handle */
efi_status_t efi_remove_protocol(const efi_handle_t handle,
				 const efi_guid_t *protocol,
				 void *protocol_interface);
/* Delete all protocols from a handle */
efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
/* Install multiple protocol interfaces */
efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
				(efi_handle_t *handle, ...);
/* Get handles that support a given protocol */
efi_status_t EFIAPI efi_locate_handle_buffer(
			enum efi_locate_search_type search_type,
			const efi_guid_t *protocol, void *search_key,
			efi_uintn_t *no_handles, efi_handle_t **buffer);
/* Close an previously opened protocol interface */
efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
				       const efi_guid_t *protocol,
				       efi_handle_t agent_handle,
				       efi_handle_t controller_handle);
/* Open a protocol interface */
efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
					const efi_guid_t *protocol,
					void **protocol_interface);
/* Call this to create an event */
efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
			      void (EFIAPI *notify_function) (
					struct efi_event *event,
					void *context),
			      void *notify_context, efi_guid_t *group,
			      struct efi_event **event);
/* Call this to set a timer */
efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
			   uint64_t trigger_time);
/* Call this to signal an event */
void efi_signal_event(struct efi_event *event);

/* open file system: */
struct efi_simple_file_system_protocol *efi_simple_file_system(
		struct blk_desc *desc, int part, struct efi_device_path *dp);

/* open file from device-path: */
struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);

/**
 * efi_size_in_pages() - convert size in bytes to size in pages
 *
 * This macro returns the number of EFI memory pages required to hold 'size'
 * bytes.
 *
 * @size:	size in bytes
 * Return:	size in pages
 */
#define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
/* Generic EFI memory allocator, call this to get memory */
void *efi_alloc(uint64_t len, int memory_type);
/* More specific EFI memory allocator, called by EFI payloads */
efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
				uint64_t *memory);
/* EFI memory free function. */
efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
/* EFI memory allocator for small allocations */
efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
			       void **buffer);
/* EFI pool memory free function. */
efi_status_t efi_free_pool(void *buffer);
/* Returns the EFI memory map */
efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
				struct efi_mem_desc *memory_map,
				efi_uintn_t *map_key,
				efi_uintn_t *descriptor_size,
				uint32_t *descriptor_version);
/* Adds a range into the EFI memory map */
efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type);
/* Adds a conventional range into the EFI memory map */
efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
					     u64 ram_top);

/* Called by board init to initialize the EFI drivers */
efi_status_t efi_driver_init(void);
/* Called by board init to initialize the EFI memory map */
int efi_memory_init(void);
/* Adds new or overrides configuration table entry to the system table */
efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
/* Sets up a loaded image */
efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
				    struct efi_device_path *file_path,
				    struct efi_loaded_image_obj **handle_ptr,
				    struct efi_loaded_image **info_ptr);
/* Print information about all loaded images */
void efi_print_image_infos(void *pc);

#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
extern void *efi_bounce_buffer;
#define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
#endif


struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
int efi_dp_match(const struct efi_device_path *a,
		 const struct efi_device_path *b);
struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
				   struct efi_device_path **rem);
/* get size of the first device path instance excluding end node */
efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
/* size of multi-instance device path excluding end node */
efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
				      const struct efi_device_path *dp2);
struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
					   const struct efi_device_path *node);
/* Create a device path node of given type, sub-type, length */
struct efi_device_path *efi_dp_create_device_node(const u8 type,
						  const u8 sub_type,
						  const u16 length);
/* Append device path instance */
struct efi_device_path *efi_dp_append_instance(
		const struct efi_device_path *dp,
		const struct efi_device_path *dpi);
/* Get next device path instance */
struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
						 efi_uintn_t *size);
/* Check if a device path contains muliple instances */
bool efi_dp_is_multi_instance(const struct efi_device_path *dp);

struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
/* Create a device node for a block device partition. */
struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
					 const char *path);
struct efi_device_path *efi_dp_from_eth(void);
struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
					uint64_t start_address,
					uint64_t end_address);
/* Determine the last device path node that is not the end node. */
const struct efi_device_path *efi_dp_last_node(
			const struct efi_device_path *dp);
efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
				    struct efi_device_path **device_path,
				    struct efi_device_path **file_path);
efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
			      const char *path,
			      struct efi_device_path **device,
			      struct efi_device_path **file);

#define EFI_DP_TYPE(_dp, _type, _subtype) \
	(((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
	 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))

/*
 * Use these to indicate that your code / data should go into the EFI runtime
 * section and thus still be available when the OS is running
 */
#define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
#define __efi_runtime __attribute__ ((section (".text.efi_runtime")))

/* Indicate supported runtime services */
efi_status_t efi_init_runtime_supported(void);

/* Update CRC32 in table header */
void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);

/* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
 * to make it available at runtime */
efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);

/* Boards may provide the functions below to implement RTS functionality */

void __efi_runtime EFIAPI efi_reset_system(
			enum efi_reset_type reset_type,
			efi_status_t reset_status,
			unsigned long data_size, void *reset_data);

/* Architecture specific initialization of the EFI subsystem */
efi_status_t efi_reset_system_init(void);

efi_status_t __efi_runtime EFIAPI efi_get_time(
			struct efi_time *time,
			struct efi_time_cap *capabilities);

efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);

#ifdef CONFIG_CMD_BOOTEFI_SELFTEST
/*
 * Entry point for the tests of the EFI API.
 * It is called by 'bootefi selftest'
 */
efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
				 struct efi_system_table *systab);
#endif

efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
				     const efi_guid_t *vendor, u32 *attributes,
				     efi_uintn_t *data_size, void *data);
efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
					       u16 *variable_name,
					       efi_guid_t *vendor);
efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
				     const efi_guid_t *vendor, u32 attributes,
				     efi_uintn_t data_size, const void *data);

efi_status_t EFIAPI efi_query_variable_info(
			u32 attributes, u64 *maximum_variable_storage_size,
			u64 *remaining_variable_storage_size,
			u64 *maximum_variable_size);

/*
 * See section 3.1.3 in the v2.7 UEFI spec for more details on
 * the layout of EFI_LOAD_OPTION.  In short it is:
 *
 *    typedef struct _EFI_LOAD_OPTION {
 *        UINT32 Attributes;
 *        UINT16 FilePathListLength;
 *        // CHAR16 Description[];   <-- variable length, NULL terminated
 *        // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
 *						 <-- FilePathListLength bytes
 *        // UINT8 OptionalData[];
 *    } EFI_LOAD_OPTION;
 */
struct efi_load_option {
	u32 attributes;
	u16 file_path_length;
	u16 *label;
	struct efi_device_path *file_path;
	const u8 *optional_data;
};

efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
					 efi_uintn_t *size);
unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
efi_status_t efi_bootmgr_load(efi_handle_t *handle);

/**
 * efi_image_regions - A list of memory regions
 *
 * @max:	Maximum number of regions
 * @num:	Number of regions
 * @reg:	array of regions
 */
struct efi_image_regions {
	int			max;
	int			num;
	struct image_region	reg[];
};

/**
 * efi_sig_data - A decoded data of struct efi_signature_data
 *
 * This structure represents an internal form of signature in
 * signature database. A listed list may represent a signature list.
 *
 * @next:	Pointer to next entry
 * @onwer:	Signature owner
 * @data:	Pointer to signature data
 * @size:	Size of signature data
 */
struct efi_sig_data {
	struct efi_sig_data *next;
	efi_guid_t owner;
	void *data;
	size_t size;
};

/**
 * efi_signature_store - A decoded data of signature database
 *
 * This structure represents an internal form of signature database.
 *
 * @next:		Pointer to next entry
 * @sig_type:		Signature type
 * @sig_data_list:	Pointer to signature list
 */
struct efi_signature_store {
	struct efi_signature_store *next;
	efi_guid_t sig_type;
	struct efi_sig_data *sig_data_list;
};

struct x509_certificate;
struct pkcs7_message;

bool efi_signature_verify_cert(struct x509_certificate *cert,
			       struct efi_signature_store *dbx);
bool efi_signature_verify_signers(struct pkcs7_message *msg,
				  struct efi_signature_store *dbx);
bool efi_signature_verify_with_sigdb(struct efi_image_regions *regs,
				     struct pkcs7_message *msg,
				  struct efi_signature_store *db,
				  struct x509_certificate **cert);

efi_status_t efi_image_region_add(struct efi_image_regions *regs,
				  const void *start, const void *end,
				  int nocheck);

void efi_sigstore_free(struct efi_signature_store *sigstore);
struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);

bool efi_secure_boot_enabled(void);

bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
		     WIN_CERTIFICATE **auth, size_t *auth_len);

#else /* CONFIG_IS_ENABLED(EFI_LOADER) */

/* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
#define __efi_runtime_data
#define __efi_runtime
static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
{
	return EFI_SUCCESS;
}

/* No loader configured, stub out EFI_ENTRY */
static inline void efi_restore_gd(void) { }
static inline void efi_set_bootdev(const char *dev, const char *devnr,
				   const char *path) { }
static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
static inline void efi_print_image_infos(void *pc) { }

#endif /* CONFIG_IS_ENABLED(EFI_LOADER) */

#endif /* _EFI_LOADER_H */