1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * EFI application loader
5 * Copyright (c) 2016 Alexander Graf
9 #define _EFI_LOADER_H 1
15 /* No need for efi loader support in SPL */
16 #if CONFIG_IS_ENABLED(EFI_LOADER)
18 #include <linux/list.h>
20 /* Maximum number of configuration tables */
21 #define EFI_MAX_CONFIGURATION_TABLES 16
23 /* GUID used by the root node */
25 EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
26 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
29 extern efi_handle_t efi_root
;
31 int __efi_entry_check(void);
32 int __efi_exit_check(void);
33 const char *__efi_nesting(void);
34 const char *__efi_nesting_inc(void);
35 const char *__efi_nesting_dec(void);
38 * Enter the u-boot world from UEFI:
40 #define EFI_ENTRY(format, ...) do { \
41 assert(__efi_entry_check()); \
42 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
43 __func__, ##__VA_ARGS__); \
47 * Exit the u-boot world back to UEFI:
49 #define EFI_EXIT(ret) ({ \
50 typeof(ret) _r = ret; \
51 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
52 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
53 assert(__efi_exit_check()); \
58 * Call non-void UEFI function from u-boot and retrieve return value:
60 #define EFI_CALL(exp) ({ \
61 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
62 assert(__efi_exit_check()); \
63 typeof(exp) _r = exp; \
64 assert(__efi_entry_check()); \
65 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
66 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
71 * Call void UEFI function from u-boot:
73 #define EFI_CALL_VOID(exp) do { \
74 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
75 assert(__efi_exit_check()); \
77 assert(__efi_entry_check()); \
78 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
82 * Write an indented message with EFI prefix
84 #define EFI_PRINT(format, ...) ({ \
85 debug("%sEFI: " format, __efi_nesting(), \
89 #ifdef CONFIG_SYS_CACHELINE_SIZE
90 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
92 /* Just use the greatest cache flush alignment requirement I'm aware of */
93 #define EFI_CACHELINE_SIZE 128
96 /* Key identifying current memory map */
97 extern efi_uintn_t efi_memory_map_key
;
99 extern struct efi_runtime_services efi_runtime_services
;
100 extern struct efi_system_table systab
;
102 extern struct efi_simple_text_output_protocol efi_con_out
;
103 extern struct efi_simple_text_input_protocol efi_con_in
;
104 extern struct efi_console_control_protocol efi_console_control
;
105 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text
;
106 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
107 extern const struct efi_device_path_utilities_protocol
108 efi_device_path_utilities
;
109 /* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */
110 extern const struct efi_unicode_collation_protocol
111 efi_unicode_collation_protocol
;
112 /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
113 extern const struct efi_unicode_collation_protocol
114 efi_unicode_collation_protocol2
;
115 extern const struct efi_hii_config_routing_protocol efi_hii_config_routing
;
116 extern const struct efi_hii_config_access_protocol efi_hii_config_access
;
117 extern const struct efi_hii_database_protocol efi_hii_database
;
118 extern const struct efi_hii_string_protocol efi_hii_string
;
120 uint16_t *efi_dp_str(struct efi_device_path
*dp
);
122 /* GUID of the U-Boot root node */
123 extern const efi_guid_t efi_u_boot_guid
;
124 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
125 extern const efi_guid_t efi_block_io_guid
;
126 extern const efi_guid_t efi_global_variable_guid
;
127 extern const efi_guid_t efi_guid_console_control
;
128 extern const efi_guid_t efi_guid_device_path
;
129 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
130 extern const efi_guid_t efi_guid_driver_binding_protocol
;
131 /* event group ExitBootServices() invoked */
132 extern const efi_guid_t efi_guid_event_group_exit_boot_services
;
133 /* event group SetVirtualAddressMap() invoked */
134 extern const efi_guid_t efi_guid_event_group_virtual_address_change
;
135 /* event group memory map changed */
136 extern const efi_guid_t efi_guid_event_group_memory_map_change
;
137 /* event group boot manager about to boot */
138 extern const efi_guid_t efi_guid_event_group_ready_to_boot
;
139 /* event group ResetSystem() invoked (before ExitBootServices) */
140 extern const efi_guid_t efi_guid_event_group_reset_system
;
141 /* GUID of the device tree table */
142 extern const efi_guid_t efi_guid_fdt
;
143 extern const efi_guid_t efi_guid_loaded_image
;
144 extern const efi_guid_t efi_guid_loaded_image_device_path
;
145 extern const efi_guid_t efi_guid_device_path_to_text_protocol
;
146 extern const efi_guid_t efi_simple_file_system_protocol_guid
;
147 extern const efi_guid_t efi_file_info_guid
;
148 /* GUID for file system information */
149 extern const efi_guid_t efi_file_system_info_guid
;
150 extern const efi_guid_t efi_guid_device_path_utilities_protocol
;
151 /* GUID of the deprecated Unicode collation protocol */
152 extern const efi_guid_t efi_guid_unicode_collation_protocol
;
153 /* GUID of the Unicode collation protocol */
154 extern const efi_guid_t efi_guid_unicode_collation_protocol2
;
155 extern const efi_guid_t efi_guid_hii_config_routing_protocol
;
156 extern const efi_guid_t efi_guid_hii_config_access_protocol
;
157 extern const efi_guid_t efi_guid_hii_database_protocol
;
158 extern const efi_guid_t efi_guid_hii_string_protocol
;
160 extern unsigned int __efi_runtime_start
, __efi_runtime_stop
;
161 extern unsigned int __efi_runtime_rel_start
, __efi_runtime_rel_stop
;
164 * struct efi_open_protocol_info_item - open protocol info item
166 * When a protocol is opened a open protocol info entry is created.
167 * These are maintained in a list.
169 * @link: link to the list of open protocol info entries of a protocol
170 * @info: information about the opening of a protocol
172 struct efi_open_protocol_info_item
{
173 struct list_head link
;
174 struct efi_open_protocol_info_entry info
;
178 * struct efi_handler - single protocol interface of a handle
180 * When the UEFI payload wants to open a protocol on an object to get its
181 * interface (usually a struct with callback functions), this struct maps the
182 * protocol GUID to the respective protocol interface
184 * @link: link to the list of protocols of a handle
185 * @guid: GUID of the protocol
186 * @protocol_interface: protocol interface
187 * @open_infos link to the list of open protocol info items
190 struct list_head link
;
191 const efi_guid_t
*guid
;
192 void *protocol_interface
;
193 struct list_head open_infos
;
197 * enum efi_object_type - type of EFI object
199 * In UnloadImage we must be able to identify if the handle relates to a
202 enum efi_object_type
{
203 EFI_OBJECT_TYPE_UNDEFINED
= 0,
204 EFI_OBJECT_TYPE_U_BOOT_FIRMWARE
,
205 EFI_OBJECT_TYPE_LOADED_IMAGE
,
206 EFI_OBJECT_TYPE_STARTED_IMAGE
,
210 * struct efi_object - dereferenced EFI handle
212 * @link: pointers to put the handle into a linked list
213 * @protocols: linked list with the protocol interfaces installed on this
216 * UEFI offers a flexible and expandable object model. The objects in the UEFI
217 * API are devices, drivers, and loaded images. struct efi_object is our storage
218 * structure for these objects.
220 * When including this structure into a larger structure always put it first so
221 * that when deleting a handle the whole encompassing structure can be freed.
223 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
224 * has been created for such pointers.
227 /* Every UEFI object is part of a global object list */
228 struct list_head link
;
229 /* The list of protocols */
230 struct list_head protocols
;
231 enum efi_object_type type
;
235 * struct efi_loaded_image_obj - handle of a loaded image
237 * @header: EFI object header
238 * @exit_status: exit status passed to Exit()
239 * @exit_data_size: exit data size passed to Exit()
240 * @exit_data: exit data passed to Exit()
241 * @exit_jmp: long jump buffer for returning form started image
242 * @entry: entry address of the relocated image
244 struct efi_loaded_image_obj
{
245 struct efi_object header
;
246 efi_status_t exit_status
;
247 efi_uintn_t
*exit_data_size
;
249 struct jmp_buf_data exit_jmp
;
250 EFIAPI
efi_status_t (*entry
)(efi_handle_t image_handle
,
251 struct efi_system_table
*st
);
258 * @link: Link to list of all events
259 * @queue_link: Link to the list of queued events
260 * @type: Type of event, see efi_create_event
261 * @notify_tpl: Task priority level of notifications
262 * @nofify_function: Function to call when the event is triggered
263 * @notify_context: Data to be passed to the notify function
264 * @group: Event group
265 * @trigger_time: Period of the timer
266 * @trigger_next: Next time to trigger the timer
267 * @trigger_type: Type of timer, see efi_set_timer
268 * @is_signaled: The event occurred. The event is in the signaled state.
271 struct list_head link
;
272 struct list_head queue_link
;
274 efi_uintn_t notify_tpl
;
275 void (EFIAPI
*notify_function
)(struct efi_event
*event
, void *context
);
276 void *notify_context
;
277 const efi_guid_t
*group
;
280 enum efi_timer_delay trigger_type
;
284 /* This list contains all UEFI objects we know of */
285 extern struct list_head efi_obj_list
;
286 /* List of all events */
287 extern struct list_head efi_events
;
290 * struct efi_protocol_notification - handle for notified protocol
292 * When a protocol interface is installed for which an event was registered with
293 * the RegisterProtocolNotify() service this structure is used to hold the
294 * handle on which the protocol interface was installed.
296 * @link: link to list of all handles notified for this event
297 * @handle: handle on which the notified protocol interface was installed
299 struct efi_protocol_notification
{
300 struct list_head link
;
305 * efi_register_notify_event - event registered by RegisterProtocolNotify()
307 * The address of this structure serves as registration value.
309 * @link: link to list of all registered events
310 * @event: registered event. The same event may registered for multiple
312 * @protocol: protocol for which the event is registered
313 * @handles: linked list of all handles on which the notified protocol was
316 struct efi_register_notify_event
{
317 struct list_head link
;
318 struct efi_event
*event
;
320 struct list_head handles
;
323 /* List of all events registered by RegisterProtocolNotify() */
324 extern struct list_head efi_register_notify_events
;
326 /* Initialize efi execution environment */
327 efi_status_t
efi_init_obj_list(void);
328 /* Called by bootefi to initialize root node */
329 efi_status_t
efi_root_node_register(void);
330 /* Called by bootefi to initialize runtime */
331 efi_status_t
efi_initialize_system_table(void);
332 /* Called by bootefi to make console interface available */
333 efi_status_t
efi_console_register(void);
334 /* Called by bootefi to make all disk storage accessible as EFI objects */
335 efi_status_t
efi_disk_register(void);
336 /* Create handles and protocols for the partitions of a block device */
337 int efi_disk_create_partitions(efi_handle_t parent
, struct blk_desc
*desc
,
338 const char *if_typename
, int diskid
,
339 const char *pdevname
);
340 /* Called by bootefi to make GOP (graphical) interface available */
341 efi_status_t
efi_gop_register(void);
342 /* Called by bootefi to make the network interface available */
343 efi_status_t
efi_net_register(void);
344 /* Called by bootefi to make the watchdog available */
345 efi_status_t
efi_watchdog_register(void);
346 /* Called by bootefi to make SMBIOS tables available */
348 * efi_acpi_register() - write out ACPI tables
350 * Called by bootefi to make ACPI tables available
352 * @return 0 if OK, -ENOMEM if no memory is available for the tables
354 efi_status_t
efi_acpi_register(void);
356 * efi_smbios_register() - write out SMBIOS tables
358 * Called by bootefi to make SMBIOS tables available
360 * @return 0 if OK, -ENOMEM if no memory is available for the tables
362 efi_status_t
efi_smbios_register(void);
364 struct efi_simple_file_system_protocol
*
365 efi_fs_from_path(struct efi_device_path
*fp
);
367 /* Called by networking code to memorize the dhcp ack package */
368 void efi_net_set_dhcp_ack(void *pkt
, int len
);
369 /* Called by efi_set_watchdog_timer to reset the timer */
370 efi_status_t
efi_set_watchdog(unsigned long timeout
);
372 /* Called from places to check whether a timer expired */
373 void efi_timer_check(void);
374 /* PE loader implementation */
375 efi_status_t
efi_load_pe(struct efi_loaded_image_obj
*handle
, void *efi
,
376 struct efi_loaded_image
*loaded_image_info
);
377 /* Called once to store the pristine gd pointer */
378 void efi_save_gd(void);
379 /* Special case handler for error/abort that just tries to dtrt to get
380 * back to u-boot world */
381 void efi_restore_gd(void);
382 /* Call this to relocate the runtime section to an address space */
383 void efi_runtime_relocate(ulong offset
, struct efi_mem_desc
*map
);
384 /* Call this to set the current device name */
385 void efi_set_bootdev(const char *dev
, const char *devnr
, const char *path
);
386 /* Add a new object to the object list. */
387 void efi_add_handle(efi_handle_t obj
);
389 efi_status_t
efi_create_handle(efi_handle_t
*handle
);
391 void efi_delete_handle(efi_handle_t obj
);
392 /* Call this to validate a handle and find the EFI object for it */
393 struct efi_object
*efi_search_obj(const efi_handle_t handle
);
395 efi_status_t EFIAPI
efi_load_image(bool boot_policy
,
396 efi_handle_t parent_image
,
397 struct efi_device_path
*file_path
,
399 efi_uintn_t source_size
,
400 efi_handle_t
*image_handle
);
402 efi_status_t EFIAPI
efi_start_image(efi_handle_t image_handle
,
403 efi_uintn_t
*exit_data_size
,
406 efi_status_t EFIAPI
efi_unload_image(efi_handle_t image_handle
);
407 /* Find a protocol on a handle */
408 efi_status_t
efi_search_protocol(const efi_handle_t handle
,
409 const efi_guid_t
*protocol_guid
,
410 struct efi_handler
**handler
);
411 /* Install new protocol on a handle */
412 efi_status_t
efi_add_protocol(const efi_handle_t handle
,
413 const efi_guid_t
*protocol
,
414 void *protocol_interface
);
415 /* Delete protocol from a handle */
416 efi_status_t
efi_remove_protocol(const efi_handle_t handle
,
417 const efi_guid_t
*protocol
,
418 void *protocol_interface
);
419 /* Delete all protocols from a handle */
420 efi_status_t
efi_remove_all_protocols(const efi_handle_t handle
);
421 /* Install multiple protocol interfaces */
422 efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
423 (efi_handle_t
*handle
, ...);
424 /* Call this to create an event */
425 efi_status_t
efi_create_event(uint32_t type
, efi_uintn_t notify_tpl
,
426 void (EFIAPI
*notify_function
) (
427 struct efi_event
*event
,
429 void *notify_context
, efi_guid_t
*group
,
430 struct efi_event
**event
);
431 /* Call this to set a timer */
432 efi_status_t
efi_set_timer(struct efi_event
*event
, enum efi_timer_delay type
,
433 uint64_t trigger_time
);
434 /* Call this to signal an event */
435 void efi_signal_event(struct efi_event
*event
);
437 /* open file system: */
438 struct efi_simple_file_system_protocol
*efi_simple_file_system(
439 struct blk_desc
*desc
, int part
, struct efi_device_path
*dp
);
441 /* open file from device-path: */
442 struct efi_file_handle
*efi_file_from_path(struct efi_device_path
*fp
);
445 * efi_size_in_pages() - convert size in bytes to size in pages
447 * This macro returns the number of EFI memory pages required to hold 'size'
450 * @size: size in bytes
451 * Return: size in pages
453 #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
454 /* Generic EFI memory allocator, call this to get memory */
455 void *efi_alloc(uint64_t len
, int memory_type
);
456 /* More specific EFI memory allocator, called by EFI payloads */
457 efi_status_t
efi_allocate_pages(int type
, int memory_type
, efi_uintn_t pages
,
459 /* EFI memory free function. */
460 efi_status_t
efi_free_pages(uint64_t memory
, efi_uintn_t pages
);
461 /* EFI memory allocator for small allocations */
462 efi_status_t
efi_allocate_pool(int pool_type
, efi_uintn_t size
,
464 /* EFI pool memory free function. */
465 efi_status_t
efi_free_pool(void *buffer
);
466 /* Returns the EFI memory map */
467 efi_status_t
efi_get_memory_map(efi_uintn_t
*memory_map_size
,
468 struct efi_mem_desc
*memory_map
,
469 efi_uintn_t
*map_key
,
470 efi_uintn_t
*descriptor_size
,
471 uint32_t *descriptor_version
);
472 /* Adds a range into the EFI memory map */
473 uint64_t efi_add_memory_map(uint64_t start
, uint64_t pages
, int memory_type
,
474 bool overlap_only_ram
);
475 /* Called by board init to initialize the EFI drivers */
476 efi_status_t
efi_driver_init(void);
477 /* Called by board init to initialize the EFI memory map */
478 int efi_memory_init(void);
479 /* Adds new or overrides configuration table entry to the system table */
480 efi_status_t
efi_install_configuration_table(const efi_guid_t
*guid
, void *table
);
481 /* Sets up a loaded image */
482 efi_status_t
efi_setup_loaded_image(struct efi_device_path
*device_path
,
483 struct efi_device_path
*file_path
,
484 struct efi_loaded_image_obj
**handle_ptr
,
485 struct efi_loaded_image
**info_ptr
);
486 /* Print information about all loaded images */
487 void efi_print_image_infos(void *pc
);
489 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
490 extern void *efi_bounce_buffer
;
491 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
495 struct efi_device_path
*efi_dp_next(const struct efi_device_path
*dp
);
496 int efi_dp_match(const struct efi_device_path
*a
,
497 const struct efi_device_path
*b
);
498 struct efi_object
*efi_dp_find_obj(struct efi_device_path
*dp
,
499 struct efi_device_path
**rem
);
500 /* get size of the first device path instance excluding end node */
501 efi_uintn_t
efi_dp_instance_size(const struct efi_device_path
*dp
);
502 /* size of multi-instance device path excluding end node */
503 efi_uintn_t
efi_dp_size(const struct efi_device_path
*dp
);
504 struct efi_device_path
*efi_dp_dup(const struct efi_device_path
*dp
);
505 struct efi_device_path
*efi_dp_append(const struct efi_device_path
*dp1
,
506 const struct efi_device_path
*dp2
);
507 struct efi_device_path
*efi_dp_append_node(const struct efi_device_path
*dp
,
508 const struct efi_device_path
*node
);
509 /* Create a device path node of given type, sub-type, length */
510 struct efi_device_path
*efi_dp_create_device_node(const u8 type
,
513 /* Append device path instance */
514 struct efi_device_path
*efi_dp_append_instance(
515 const struct efi_device_path
*dp
,
516 const struct efi_device_path
*dpi
);
517 /* Get next device path instance */
518 struct efi_device_path
*efi_dp_get_next_instance(struct efi_device_path
**dp
,
520 /* Check if a device path contains muliple instances */
521 bool efi_dp_is_multi_instance(const struct efi_device_path
*dp
);
523 struct efi_device_path
*efi_dp_from_dev(struct udevice
*dev
);
524 struct efi_device_path
*efi_dp_from_part(struct blk_desc
*desc
, int part
);
525 /* Create a device node for a block device partition. */
526 struct efi_device_path
*efi_dp_part_node(struct blk_desc
*desc
, int part
);
527 struct efi_device_path
*efi_dp_from_file(struct blk_desc
*desc
, int part
,
529 struct efi_device_path
*efi_dp_from_eth(void);
530 struct efi_device_path
*efi_dp_from_mem(uint32_t mem_type
,
531 uint64_t start_address
,
532 uint64_t end_address
);
533 /* Determine the last device path node that is not the end node. */
534 const struct efi_device_path
*efi_dp_last_node(
535 const struct efi_device_path
*dp
);
536 efi_status_t
efi_dp_split_file_path(struct efi_device_path
*full_path
,
537 struct efi_device_path
**device_path
,
538 struct efi_device_path
**file_path
);
539 efi_status_t
efi_dp_from_name(const char *dev
, const char *devnr
,
541 struct efi_device_path
**device
,
542 struct efi_device_path
**file
);
544 #define EFI_DP_TYPE(_dp, _type, _subtype) \
545 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
546 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
549 * ascii2unicode() - convert ASCII string to UTF-16 string
551 * A zero terminated ASCII string is converted to a zero terminated UTF-16
552 * string. The output buffer must be preassigned.
554 * @unicode: preassigned output buffer for UTF-16 string
555 * @ascii: ASCII string to be converted
557 static inline void ascii2unicode(u16
*unicode
, const char *ascii
)
560 *(unicode
++) = *(ascii
++);
564 static inline int guidcmp(const efi_guid_t
*g1
, const efi_guid_t
*g2
)
566 return memcmp(g1
, g2
, sizeof(efi_guid_t
));
570 * Use these to indicate that your code / data should go into the EFI runtime
571 * section and thus still be available when the OS is running
573 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
574 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
576 /* Indicate supported runtime services */
577 efi_status_t
efi_init_runtime_supported(void);
579 /* Update CRC32 in table header */
580 void __efi_runtime
efi_update_table_header_crc32(struct efi_table_hdr
*table
);
582 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
583 * to make it available at runtime */
584 efi_status_t
efi_add_runtime_mmio(void *mmio_ptr
, u64 len
);
586 /* Boards may provide the functions below to implement RTS functionality */
588 void __efi_runtime EFIAPI
efi_reset_system(
589 enum efi_reset_type reset_type
,
590 efi_status_t reset_status
,
591 unsigned long data_size
, void *reset_data
);
593 /* Architecture specific initialization of the EFI subsystem */
594 efi_status_t
efi_reset_system_init(void);
596 efi_status_t __efi_runtime EFIAPI
efi_get_time(
597 struct efi_time
*time
,
598 struct efi_time_cap
*capabilities
);
600 efi_status_t __efi_runtime EFIAPI
efi_set_time(struct efi_time
*time
);
602 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
604 * Entry point for the tests of the EFI API.
605 * It is called by 'bootefi selftest'
607 efi_status_t EFIAPI
efi_selftest(efi_handle_t image_handle
,
608 struct efi_system_table
*systab
);
611 efi_status_t EFIAPI
efi_get_variable(u16
*variable_name
,
612 const efi_guid_t
*vendor
, u32
*attributes
,
613 efi_uintn_t
*data_size
, void *data
);
614 efi_status_t EFIAPI
efi_get_next_variable_name(efi_uintn_t
*variable_name_size
,
616 const efi_guid_t
*vendor
);
617 efi_status_t EFIAPI
efi_set_variable(u16
*variable_name
,
618 const efi_guid_t
*vendor
, u32 attributes
,
619 efi_uintn_t data_size
, const void *data
);
622 * See section 3.1.3 in the v2.7 UEFI spec for more details on
623 * the layout of EFI_LOAD_OPTION. In short it is:
625 * typedef struct _EFI_LOAD_OPTION {
627 * UINT16 FilePathListLength;
628 * // CHAR16 Description[]; <-- variable length, NULL terminated
629 * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
630 * <-- FilePathListLength bytes
631 * // UINT8 OptionalData[];
634 struct efi_load_option
{
636 u16 file_path_length
;
638 struct efi_device_path
*file_path
;
639 const u8
*optional_data
;
642 void efi_deserialize_load_option(struct efi_load_option
*lo
, u8
*data
);
643 unsigned long efi_serialize_load_option(struct efi_load_option
*lo
, u8
**data
);
644 efi_status_t
efi_bootmgr_load(efi_handle_t
*handle
);
646 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
648 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
649 #define __efi_runtime_data
650 #define __efi_runtime
651 static inline efi_status_t
efi_add_runtime_mmio(void *mmio_ptr
, u64 len
)
656 /* No loader configured, stub out EFI_ENTRY */
657 static inline void efi_restore_gd(void) { }
658 static inline void efi_set_bootdev(const char *dev
, const char *devnr
,
659 const char *path
) { }
660 static inline void efi_net_set_dhcp_ack(void *pkt
, int len
) { }
661 static inline void efi_print_image_infos(void *pc
) { }
663 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
665 #endif /* _EFI_LOADER_H */