1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * EFI application loader
5 * Copyright (c) 2016 Alexander Graf
9 #define _EFI_LOADER_H 1
15 static inline int guidcmp(const void *g1, const void *g2)
17 return memcmp(g1, g2, sizeof(efi_guid_t));
20 static inline void *guidcpy(void *dst, const void *src)
22 return memcpy(dst, src, sizeof(efi_guid_t));
25 /* No need for efi loader support in SPL */
26 #if CONFIG_IS_ENABLED(EFI_LOADER)
28 #include <linux/list.h>
30 /* Maximum number of configuration tables */
31 #define EFI_MAX_CONFIGURATION_TABLES 16
33 /* GUID used by the root node */
35 EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
36 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
37 /* GUID used as host device on sandbox */
38 #define U_BOOT_HOST_DEV_GUID \
39 EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
40 0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
42 /* Use internal device tree when starting UEFI application */
43 #define EFI_FDT_USE_INTERNAL NULL
46 extern efi_handle_t efi_root;
48 int __efi_entry_check(void);
49 int __efi_exit_check(void);
50 const char *__efi_nesting(void);
51 const char *__efi_nesting_inc(void);
52 const char *__efi_nesting_dec(void);
55 * Enter the u-boot world from UEFI:
57 #define EFI_ENTRY(format, ...) do { \
58 assert(__efi_entry_check()); \
59 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
60 __func__, ##__VA_ARGS__); \
64 * Exit the u-boot world back to UEFI:
66 #define EFI_EXIT(ret) ({ \
67 typeof(ret) _r = ret; \
68 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
69 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
70 assert(__efi_exit_check()); \
75 * Call non-void UEFI function from u-boot and retrieve return value:
77 #define EFI_CALL(exp) ({ \
78 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
79 assert(__efi_exit_check()); \
80 typeof(exp) _r = exp; \
81 assert(__efi_entry_check()); \
82 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
83 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
88 * Call void UEFI function from u-boot:
90 #define EFI_CALL_VOID(exp) do { \
91 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
92 assert(__efi_exit_check()); \
94 assert(__efi_entry_check()); \
95 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
99 * Write an indented message with EFI prefix
101 #define EFI_PRINT(format, ...) ({ \
102 debug("%sEFI: " format, __efi_nesting(), \
106 #ifdef CONFIG_SYS_CACHELINE_SIZE
107 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
109 /* Just use the greatest cache flush alignment requirement I'm aware of */
110 #define EFI_CACHELINE_SIZE 128
113 /* Key identifying current memory map */
114 extern efi_uintn_t efi_memory_map_key;
116 extern struct efi_runtime_services efi_runtime_services;
117 extern struct efi_system_table systab;
119 extern struct efi_simple_text_output_protocol efi_con_out;
120 extern struct efi_simple_text_input_protocol efi_con_in;
121 extern struct efi_console_control_protocol efi_console_control;
122 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
123 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
124 extern const struct efi_device_path_utilities_protocol
125 efi_device_path_utilities;
126 /* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */
127 extern const struct efi_unicode_collation_protocol
128 efi_unicode_collation_protocol;
129 /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
130 extern const struct efi_unicode_collation_protocol
131 efi_unicode_collation_protocol2;
132 extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
133 extern const struct efi_hii_config_access_protocol efi_hii_config_access;
134 extern const struct efi_hii_database_protocol efi_hii_database;
135 extern const struct efi_hii_string_protocol efi_hii_string;
136 extern const struct efi_rng_protocol efi_rng_protocol;
138 uint16_t *efi_dp_str(struct efi_device_path *dp);
140 /* GUID of the U-Boot root node */
141 extern const efi_guid_t efi_u_boot_guid;
142 #ifdef CONFIG_SANDBOX
143 /* GUID of U-Boot host device on sandbox */
144 extern const efi_guid_t efi_guid_host_dev;
146 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
147 extern const efi_guid_t efi_block_io_guid;
148 extern const efi_guid_t efi_global_variable_guid;
149 extern const efi_guid_t efi_guid_console_control;
150 extern const efi_guid_t efi_guid_device_path;
151 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
152 extern const efi_guid_t efi_guid_driver_binding_protocol;
153 /* event group ExitBootServices() invoked */
154 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
155 /* event group SetVirtualAddressMap() invoked */
156 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
157 /* event group memory map changed */
158 extern const efi_guid_t efi_guid_event_group_memory_map_change;
159 /* event group boot manager about to boot */
160 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
161 /* event group ResetSystem() invoked (before ExitBootServices) */
162 extern const efi_guid_t efi_guid_event_group_reset_system;
163 /* GUID of the device tree table */
164 extern const efi_guid_t efi_guid_fdt;
165 extern const efi_guid_t efi_guid_loaded_image;
166 extern const efi_guid_t efi_guid_loaded_image_device_path;
167 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
168 extern const efi_guid_t efi_simple_file_system_protocol_guid;
169 extern const efi_guid_t efi_file_info_guid;
170 /* GUID for file system information */
171 extern const efi_guid_t efi_file_system_info_guid;
172 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
173 /* GUID of the deprecated Unicode collation protocol */
174 extern const efi_guid_t efi_guid_unicode_collation_protocol;
175 /* GUID of the Unicode collation protocol */
176 extern const efi_guid_t efi_guid_unicode_collation_protocol2;
177 extern const efi_guid_t efi_guid_hii_config_routing_protocol;
178 extern const efi_guid_t efi_guid_hii_config_access_protocol;
179 extern const efi_guid_t efi_guid_hii_database_protocol;
180 extern const efi_guid_t efi_guid_hii_string_protocol;
182 /* GUID of RNG protocol */
183 extern const efi_guid_t efi_guid_rng_protocol;
185 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
186 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
189 * struct efi_open_protocol_info_item - open protocol info item
191 * When a protocol is opened a open protocol info entry is created.
192 * These are maintained in a list.
194 * @link: link to the list of open protocol info entries of a protocol
195 * @info: information about the opening of a protocol
197 struct efi_open_protocol_info_item {
198 struct list_head link;
199 struct efi_open_protocol_info_entry info;
203 * struct efi_handler - single protocol interface of a handle
205 * When the UEFI payload wants to open a protocol on an object to get its
206 * interface (usually a struct with callback functions), this struct maps the
207 * protocol GUID to the respective protocol interface
209 * @link: link to the list of protocols of a handle
210 * @guid: GUID of the protocol
211 * @protocol_interface: protocol interface
212 * @open_infos link to the list of open protocol info items
215 struct list_head link;
216 const efi_guid_t *guid;
217 void *protocol_interface;
218 struct list_head open_infos;
222 * enum efi_object_type - type of EFI object
224 * In UnloadImage we must be able to identify if the handle relates to a
227 enum efi_object_type {
228 EFI_OBJECT_TYPE_UNDEFINED = 0,
229 EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
230 EFI_OBJECT_TYPE_LOADED_IMAGE,
231 EFI_OBJECT_TYPE_STARTED_IMAGE,
235 * struct efi_object - dereferenced EFI handle
237 * @link: pointers to put the handle into a linked list
238 * @protocols: linked list with the protocol interfaces installed on this
241 * UEFI offers a flexible and expandable object model. The objects in the UEFI
242 * API are devices, drivers, and loaded images. struct efi_object is our storage
243 * structure for these objects.
245 * When including this structure into a larger structure always put it first so
246 * that when deleting a handle the whole encompassing structure can be freed.
248 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
249 * has been created for such pointers.
252 /* Every UEFI object is part of a global object list */
253 struct list_head link;
254 /* The list of protocols */
255 struct list_head protocols;
256 enum efi_object_type type;
260 * struct efi_loaded_image_obj - handle of a loaded image
262 * @header: EFI object header
263 * @exit_status: exit status passed to Exit()
264 * @exit_data_size: exit data size passed to Exit()
265 * @exit_data: exit data passed to Exit()
266 * @exit_jmp: long jump buffer for returning form started image
267 * @entry: entry address of the relocated image
269 struct efi_loaded_image_obj {
270 struct efi_object header;
271 efi_status_t exit_status;
272 efi_uintn_t *exit_data_size;
274 struct jmp_buf_data exit_jmp;
275 EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
276 struct efi_system_table *st);
283 * @link: Link to list of all events
284 * @queue_link: Link to the list of queued events
285 * @type: Type of event, see efi_create_event
286 * @notify_tpl: Task priority level of notifications
287 * @nofify_function: Function to call when the event is triggered
288 * @notify_context: Data to be passed to the notify function
289 * @group: Event group
290 * @trigger_time: Period of the timer
291 * @trigger_next: Next time to trigger the timer
292 * @trigger_type: Type of timer, see efi_set_timer
293 * @is_signaled: The event occurred. The event is in the signaled state.
296 struct list_head link;
297 struct list_head queue_link;
299 efi_uintn_t notify_tpl;
300 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
301 void *notify_context;
302 const efi_guid_t *group;
305 enum efi_timer_delay trigger_type;
309 /* This list contains all UEFI objects we know of */
310 extern struct list_head efi_obj_list;
311 /* List of all events */
312 extern struct list_head efi_events;
315 * struct efi_protocol_notification - handle for notified protocol
317 * When a protocol interface is installed for which an event was registered with
318 * the RegisterProtocolNotify() service this structure is used to hold the
319 * handle on which the protocol interface was installed.
321 * @link: link to list of all handles notified for this event
322 * @handle: handle on which the notified protocol interface was installed
324 struct efi_protocol_notification {
325 struct list_head link;
330 * efi_register_notify_event - event registered by RegisterProtocolNotify()
332 * The address of this structure serves as registration value.
334 * @link: link to list of all registered events
335 * @event: registered event. The same event may registered for multiple
337 * @protocol: protocol for which the event is registered
338 * @handles: linked list of all handles on which the notified protocol was
341 struct efi_register_notify_event {
342 struct list_head link;
343 struct efi_event *event;
345 struct list_head handles;
348 /* List of all events registered by RegisterProtocolNotify() */
349 extern struct list_head efi_register_notify_events;
351 /* Initialize efi execution environment */
352 efi_status_t efi_init_obj_list(void);
353 /* Install device tree */
354 efi_status_t efi_install_fdt(void *fdt);
355 /* Run loaded UEFI image */
356 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
357 /* Initialize variable services */
358 efi_status_t efi_init_variables(void);
359 /* Notify ExitBootServices() is called */
360 void efi_variables_boot_exit_notify(void);
361 /* Called by bootefi to initialize root node */
362 efi_status_t efi_root_node_register(void);
363 /* Called by bootefi to initialize runtime */
364 efi_status_t efi_initialize_system_table(void);
365 /* efi_runtime_detach() - detach unimplemented runtime functions */
366 void efi_runtime_detach(void);
367 /* Called by bootefi to make console interface available */
368 efi_status_t efi_console_register(void);
369 /* Called by bootefi to make all disk storage accessible as EFI objects */
370 efi_status_t efi_disk_register(void);
371 /* Create handles and protocols for the partitions of a block device */
372 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
373 const char *if_typename, int diskid,
374 const char *pdevname);
375 /* Called by bootefi to make GOP (graphical) interface available */
376 efi_status_t efi_gop_register(void);
377 /* Called by bootefi to make the network interface available */
378 efi_status_t efi_net_register(void);
379 /* Called by bootefi to make the watchdog available */
380 efi_status_t efi_watchdog_register(void);
381 /* Called by bootefi to make SMBIOS tables available */
383 * efi_acpi_register() - write out ACPI tables
385 * Called by bootefi to make ACPI tables available
387 * @return 0 if OK, -ENOMEM if no memory is available for the tables
389 efi_status_t efi_acpi_register(void);
391 * efi_smbios_register() - write out SMBIOS tables
393 * Called by bootefi to make SMBIOS tables available
395 * @return 0 if OK, -ENOMEM if no memory is available for the tables
397 efi_status_t efi_smbios_register(void);
399 struct efi_simple_file_system_protocol *
400 efi_fs_from_path(struct efi_device_path *fp);
402 /* Called by networking code to memorize the dhcp ack package */
403 void efi_net_set_dhcp_ack(void *pkt, int len);
404 /* Called by efi_set_watchdog_timer to reset the timer */
405 efi_status_t efi_set_watchdog(unsigned long timeout);
407 /* Called from places to check whether a timer expired */
408 void efi_timer_check(void);
409 /* PE loader implementation */
410 efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle, void *efi,
411 struct efi_loaded_image *loaded_image_info);
412 /* Called once to store the pristine gd pointer */
413 void efi_save_gd(void);
414 /* Special case handler for error/abort that just tries to dtrt to get
415 * back to u-boot world */
416 void efi_restore_gd(void);
417 /* Call this to relocate the runtime section to an address space */
418 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
419 /* Call this to set the current device name */
420 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
421 /* Add a new object to the object list. */
422 void efi_add_handle(efi_handle_t obj);
424 efi_status_t efi_create_handle(efi_handle_t *handle);
426 void efi_delete_handle(efi_handle_t obj);
427 /* Call this to validate a handle and find the EFI object for it */
428 struct efi_object *efi_search_obj(const efi_handle_t handle);
430 efi_status_t EFIAPI efi_load_image(bool boot_policy,
431 efi_handle_t parent_image,
432 struct efi_device_path *file_path,
434 efi_uintn_t source_size,
435 efi_handle_t *image_handle);
437 efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
438 efi_uintn_t *exit_data_size,
441 efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
442 /* Find a protocol on a handle */
443 efi_status_t efi_search_protocol(const efi_handle_t handle,
444 const efi_guid_t *protocol_guid,
445 struct efi_handler **handler);
446 /* Install new protocol on a handle */
447 efi_status_t efi_add_protocol(const efi_handle_t handle,
448 const efi_guid_t *protocol,
449 void *protocol_interface);
450 /* Delete protocol from a handle */
451 efi_status_t efi_remove_protocol(const efi_handle_t handle,
452 const efi_guid_t *protocol,
453 void *protocol_interface);
454 /* Delete all protocols from a handle */
455 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
456 /* Install multiple protocol interfaces */
457 efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
458 (efi_handle_t *handle, ...);
459 /* Call this to create an event */
460 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
461 void (EFIAPI *notify_function) (
462 struct efi_event *event,
464 void *notify_context, efi_guid_t *group,
465 struct efi_event **event);
466 /* Call this to set a timer */
467 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
468 uint64_t trigger_time);
469 /* Call this to signal an event */
470 void efi_signal_event(struct efi_event *event);
472 /* open file system: */
473 struct efi_simple_file_system_protocol *efi_simple_file_system(
474 struct blk_desc *desc, int part, struct efi_device_path *dp);
476 /* open file from device-path: */
477 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
480 * efi_size_in_pages() - convert size in bytes to size in pages
482 * This macro returns the number of EFI memory pages required to hold 'size'
485 * @size: size in bytes
486 * Return: size in pages
488 #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
489 /* Generic EFI memory allocator, call this to get memory */
490 void *efi_alloc(uint64_t len, int memory_type);
491 /* More specific EFI memory allocator, called by EFI payloads */
492 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
494 /* EFI memory free function. */
495 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
496 /* EFI memory allocator for small allocations */
497 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
499 /* EFI pool memory free function. */
500 efi_status_t efi_free_pool(void *buffer);
501 /* Returns the EFI memory map */
502 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
503 struct efi_mem_desc *memory_map,
504 efi_uintn_t *map_key,
505 efi_uintn_t *descriptor_size,
506 uint32_t *descriptor_version);
507 /* Adds a range into the EFI memory map */
508 efi_status_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
509 bool overlap_only_ram);
510 /* Adds a conventional range into the EFI memory map */
511 efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
514 /* Called by board init to initialize the EFI drivers */
515 efi_status_t efi_driver_init(void);
516 /* Called by board init to initialize the EFI memory map */
517 int efi_memory_init(void);
518 /* Adds new or overrides configuration table entry to the system table */
519 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
520 /* Sets up a loaded image */
521 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
522 struct efi_device_path *file_path,
523 struct efi_loaded_image_obj **handle_ptr,
524 struct efi_loaded_image **info_ptr);
525 /* Print information about all loaded images */
526 void efi_print_image_infos(void *pc);
528 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
529 extern void *efi_bounce_buffer;
530 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
534 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
535 int efi_dp_match(const struct efi_device_path *a,
536 const struct efi_device_path *b);
537 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
538 struct efi_device_path **rem);
539 /* get size of the first device path instance excluding end node */
540 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
541 /* size of multi-instance device path excluding end node */
542 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
543 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
544 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
545 const struct efi_device_path *dp2);
546 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
547 const struct efi_device_path *node);
548 /* Create a device path node of given type, sub-type, length */
549 struct efi_device_path *efi_dp_create_device_node(const u8 type,
552 /* Append device path instance */
553 struct efi_device_path *efi_dp_append_instance(
554 const struct efi_device_path *dp,
555 const struct efi_device_path *dpi);
556 /* Get next device path instance */
557 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
559 /* Check if a device path contains muliple instances */
560 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
562 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
563 /* Create a device node for a block device partition. */
564 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
565 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
567 struct efi_device_path *efi_dp_from_eth(void);
568 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
569 uint64_t start_address,
570 uint64_t end_address);
571 /* Determine the last device path node that is not the end node. */
572 const struct efi_device_path *efi_dp_last_node(
573 const struct efi_device_path *dp);
574 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
575 struct efi_device_path **device_path,
576 struct efi_device_path **file_path);
577 efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
579 struct efi_device_path **device,
580 struct efi_device_path **file);
582 #define EFI_DP_TYPE(_dp, _type, _subtype) \
583 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
584 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
587 * Use these to indicate that your code / data should go into the EFI runtime
588 * section and thus still be available when the OS is running
590 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
591 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
593 /* Indicate supported runtime services */
594 efi_status_t efi_init_runtime_supported(void);
596 /* Update CRC32 in table header */
597 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
599 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
600 * to make it available at runtime */
601 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
603 /* Boards may provide the functions below to implement RTS functionality */
605 void __efi_runtime EFIAPI efi_reset_system(
606 enum efi_reset_type reset_type,
607 efi_status_t reset_status,
608 unsigned long data_size, void *reset_data);
610 /* Architecture specific initialization of the EFI subsystem */
611 efi_status_t efi_reset_system_init(void);
613 efi_status_t __efi_runtime EFIAPI efi_get_time(
614 struct efi_time *time,
615 struct efi_time_cap *capabilities);
617 efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
619 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
621 * Entry point for the tests of the EFI API.
622 * It is called by 'bootefi selftest'
624 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
625 struct efi_system_table *systab);
628 efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
629 const efi_guid_t *vendor, u32 *attributes,
630 efi_uintn_t *data_size, void *data);
631 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
633 const efi_guid_t *vendor);
634 efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
635 const efi_guid_t *vendor, u32 attributes,
636 efi_uintn_t data_size, const void *data);
638 efi_status_t EFIAPI efi_query_variable_info(
639 u32 attributes, u64 *maximum_variable_storage_size,
640 u64 *remaining_variable_storage_size,
641 u64 *maximum_variable_size);
644 * See section 3.1.3 in the v2.7 UEFI spec for more details on
645 * the layout of EFI_LOAD_OPTION. In short it is:
647 * typedef struct _EFI_LOAD_OPTION {
649 * UINT16 FilePathListLength;
650 * // CHAR16 Description[]; <-- variable length, NULL terminated
651 * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
652 * <-- FilePathListLength bytes
653 * // UINT8 OptionalData[];
656 struct efi_load_option {
658 u16 file_path_length;
660 struct efi_device_path *file_path;
661 const u8 *optional_data;
664 void efi_deserialize_load_option(struct efi_load_option *lo, u8 *data);
665 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
666 efi_status_t efi_bootmgr_load(efi_handle_t *handle);
668 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
670 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
671 #define __efi_runtime_data
672 #define __efi_runtime
673 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
678 /* No loader configured, stub out EFI_ENTRY */
679 static inline void efi_restore_gd(void) { }
680 static inline void efi_set_bootdev(const char *dev, const char *devnr,
681 const char *path) { }
682 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
683 static inline void efi_print_image_infos(void *pc) { }
685 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
687 #endif /* _EFI_LOADER_H */