1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * EFI application loader
5 * Copyright (c) 2016 Alexander Graf
9 #define _EFI_LOADER_H 1
16 static inline int guidcmp(const void *g1, const void *g2)
18 return memcmp(g1, g2, sizeof(efi_guid_t));
21 static inline void *guidcpy(void *dst, const void *src)
23 return memcpy(dst, src, sizeof(efi_guid_t));
26 /* No need for efi loader support in SPL */
27 #if CONFIG_IS_ENABLED(EFI_LOADER)
29 #include <linux/list.h>
30 #include <linux/oid_registry.h>
32 /* Maximum number of configuration tables */
33 #define EFI_MAX_CONFIGURATION_TABLES 16
35 /* GUID used by the root node */
37 EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
38 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
39 /* GUID used as host device on sandbox */
40 #define U_BOOT_HOST_DEV_GUID \
41 EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
42 0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
44 /* Use internal device tree when starting UEFI application */
45 #define EFI_FDT_USE_INTERNAL NULL
48 extern efi_handle_t efi_root;
50 /* EFI system partition */
51 extern struct efi_system_partition {
55 } efi_system_partition;
57 int __efi_entry_check(void);
58 int __efi_exit_check(void);
59 const char *__efi_nesting(void);
60 const char *__efi_nesting_inc(void);
61 const char *__efi_nesting_dec(void);
64 * Enter the u-boot world from UEFI:
66 #define EFI_ENTRY(format, ...) do { \
67 assert(__efi_entry_check()); \
68 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
69 __func__, ##__VA_ARGS__); \
73 * Exit the u-boot world back to UEFI:
75 #define EFI_EXIT(ret) ({ \
76 typeof(ret) _r = ret; \
77 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
78 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
79 assert(__efi_exit_check()); \
84 * Call non-void UEFI function from u-boot and retrieve return value:
86 #define EFI_CALL(exp) ({ \
87 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
88 assert(__efi_exit_check()); \
89 typeof(exp) _r = exp; \
90 assert(__efi_entry_check()); \
91 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
92 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
97 * Call void UEFI function from u-boot:
99 #define EFI_CALL_VOID(exp) do { \
100 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
101 assert(__efi_exit_check()); \
103 assert(__efi_entry_check()); \
104 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
108 * Write an indented message with EFI prefix
110 #define EFI_PRINT(format, ...) ({ \
111 debug("%sEFI: " format, __efi_nesting(), \
115 #ifdef CONFIG_SYS_CACHELINE_SIZE
116 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
118 /* Just use the greatest cache flush alignment requirement I'm aware of */
119 #define EFI_CACHELINE_SIZE 128
122 /* Key identifying current memory map */
123 extern efi_uintn_t efi_memory_map_key;
125 extern struct efi_runtime_services efi_runtime_services;
126 extern struct efi_system_table systab;
128 extern struct efi_simple_text_output_protocol efi_con_out;
129 extern struct efi_simple_text_input_protocol efi_con_in;
130 extern struct efi_console_control_protocol efi_console_control;
131 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
132 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
133 extern const struct efi_device_path_utilities_protocol
134 efi_device_path_utilities;
135 /* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */
136 extern const struct efi_unicode_collation_protocol
137 efi_unicode_collation_protocol;
138 /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
139 extern const struct efi_unicode_collation_protocol
140 efi_unicode_collation_protocol2;
141 extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
142 extern const struct efi_hii_config_access_protocol efi_hii_config_access;
143 extern const struct efi_hii_database_protocol efi_hii_database;
144 extern const struct efi_hii_string_protocol efi_hii_string;
145 extern const struct efi_rng_protocol efi_rng_protocol;
147 uint16_t *efi_dp_str(struct efi_device_path *dp);
149 /* GUID of the U-Boot root node */
150 extern const efi_guid_t efi_u_boot_guid;
151 #ifdef CONFIG_SANDBOX
152 /* GUID of U-Boot host device on sandbox */
153 extern const efi_guid_t efi_guid_host_dev;
155 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
156 extern const efi_guid_t efi_block_io_guid;
157 extern const efi_guid_t efi_global_variable_guid;
158 extern const efi_guid_t efi_guid_console_control;
159 extern const efi_guid_t efi_guid_device_path;
160 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
161 extern const efi_guid_t efi_guid_driver_binding_protocol;
162 /* event group ExitBootServices() invoked */
163 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
164 /* event group SetVirtualAddressMap() invoked */
165 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
166 /* event group memory map changed */
167 extern const efi_guid_t efi_guid_event_group_memory_map_change;
168 /* event group boot manager about to boot */
169 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
170 /* event group ResetSystem() invoked (before ExitBootServices) */
171 extern const efi_guid_t efi_guid_event_group_reset_system;
172 /* GUID of the device tree table */
173 extern const efi_guid_t efi_guid_fdt;
174 extern const efi_guid_t efi_guid_loaded_image;
175 extern const efi_guid_t efi_guid_loaded_image_device_path;
176 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
177 extern const efi_guid_t efi_simple_file_system_protocol_guid;
178 extern const efi_guid_t efi_file_info_guid;
179 /* GUID for file system information */
180 extern const efi_guid_t efi_file_system_info_guid;
181 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
182 /* GUID of the deprecated Unicode collation protocol */
183 extern const efi_guid_t efi_guid_unicode_collation_protocol;
184 /* GUID of the Unicode collation protocol */
185 extern const efi_guid_t efi_guid_unicode_collation_protocol2;
186 extern const efi_guid_t efi_guid_hii_config_routing_protocol;
187 extern const efi_guid_t efi_guid_hii_config_access_protocol;
188 extern const efi_guid_t efi_guid_hii_database_protocol;
189 extern const efi_guid_t efi_guid_hii_string_protocol;
190 /* GUIDs for authentication */
191 extern const efi_guid_t efi_guid_image_security_database;
192 extern const efi_guid_t efi_guid_sha256;
193 extern const efi_guid_t efi_guid_cert_x509;
194 extern const efi_guid_t efi_guid_cert_x509_sha256;
195 extern const efi_guid_t efi_guid_cert_type_pkcs7;
197 /* GUID of RNG protocol */
198 extern const efi_guid_t efi_guid_rng_protocol;
200 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
201 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
204 * struct efi_open_protocol_info_item - open protocol info item
206 * When a protocol is opened a open protocol info entry is created.
207 * These are maintained in a list.
209 * @link: link to the list of open protocol info entries of a protocol
210 * @info: information about the opening of a protocol
212 struct efi_open_protocol_info_item {
213 struct list_head link;
214 struct efi_open_protocol_info_entry info;
218 * struct efi_handler - single protocol interface of a handle
220 * When the UEFI payload wants to open a protocol on an object to get its
221 * interface (usually a struct with callback functions), this struct maps the
222 * protocol GUID to the respective protocol interface
224 * @link: link to the list of protocols of a handle
225 * @guid: GUID of the protocol
226 * @protocol_interface: protocol interface
227 * @open_infos link to the list of open protocol info items
230 struct list_head link;
231 const efi_guid_t *guid;
232 void *protocol_interface;
233 struct list_head open_infos;
237 * enum efi_object_type - type of EFI object
239 * In UnloadImage we must be able to identify if the handle relates to a
242 enum efi_object_type {
243 EFI_OBJECT_TYPE_UNDEFINED = 0,
244 EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
245 EFI_OBJECT_TYPE_LOADED_IMAGE,
246 EFI_OBJECT_TYPE_STARTED_IMAGE,
250 * struct efi_object - dereferenced EFI handle
252 * @link: pointers to put the handle into a linked list
253 * @protocols: linked list with the protocol interfaces installed on this
256 * UEFI offers a flexible and expandable object model. The objects in the UEFI
257 * API are devices, drivers, and loaded images. struct efi_object is our storage
258 * structure for these objects.
260 * When including this structure into a larger structure always put it first so
261 * that when deleting a handle the whole encompassing structure can be freed.
263 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
264 * has been created for such pointers.
267 /* Every UEFI object is part of a global object list */
268 struct list_head link;
269 /* The list of protocols */
270 struct list_head protocols;
271 enum efi_object_type type;
274 enum efi_image_auth_status {
275 EFI_IMAGE_AUTH_FAILED = 0,
276 EFI_IMAGE_AUTH_PASSED,
280 * struct efi_loaded_image_obj - handle of a loaded image
282 * @header: EFI object header
283 * @exit_status: exit status passed to Exit()
284 * @exit_data_size: exit data size passed to Exit()
285 * @exit_data: exit data passed to Exit()
286 * @exit_jmp: long jump buffer for returning form started image
287 * @entry: entry address of the relocated image
289 struct efi_loaded_image_obj {
290 struct efi_object header;
291 efi_status_t exit_status;
292 efi_uintn_t *exit_data_size;
294 struct jmp_buf_data exit_jmp;
295 EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
296 struct efi_system_table *st);
298 enum efi_image_auth_status auth_status;
304 * @link: Link to list of all events
305 * @queue_link: Link to the list of queued events
306 * @type: Type of event, see efi_create_event
307 * @notify_tpl: Task priority level of notifications
308 * @nofify_function: Function to call when the event is triggered
309 * @notify_context: Data to be passed to the notify function
310 * @group: Event group
311 * @trigger_time: Period of the timer
312 * @trigger_next: Next time to trigger the timer
313 * @trigger_type: Type of timer, see efi_set_timer
314 * @is_signaled: The event occurred. The event is in the signaled state.
317 struct list_head link;
318 struct list_head queue_link;
320 efi_uintn_t notify_tpl;
321 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
322 void *notify_context;
323 const efi_guid_t *group;
326 enum efi_timer_delay trigger_type;
330 /* This list contains all UEFI objects we know of */
331 extern struct list_head efi_obj_list;
332 /* List of all events */
333 extern struct list_head efi_events;
336 * struct efi_protocol_notification - handle for notified protocol
338 * When a protocol interface is installed for which an event was registered with
339 * the RegisterProtocolNotify() service this structure is used to hold the
340 * handle on which the protocol interface was installed.
342 * @link: link to list of all handles notified for this event
343 * @handle: handle on which the notified protocol interface was installed
345 struct efi_protocol_notification {
346 struct list_head link;
351 * efi_register_notify_event - event registered by RegisterProtocolNotify()
353 * The address of this structure serves as registration value.
355 * @link: link to list of all registered events
356 * @event: registered event. The same event may registered for multiple
358 * @protocol: protocol for which the event is registered
359 * @handles: linked list of all handles on which the notified protocol was
362 struct efi_register_notify_event {
363 struct list_head link;
364 struct efi_event *event;
366 struct list_head handles;
369 /* List of all events registered by RegisterProtocolNotify() */
370 extern struct list_head efi_register_notify_events;
372 /* Initialize efi execution environment */
373 efi_status_t efi_init_obj_list(void);
374 /* Install device tree */
375 efi_status_t efi_install_fdt(void *fdt);
376 /* Run loaded UEFI image */
377 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
378 /* Initialize variable services */
379 efi_status_t efi_init_variables(void);
380 /* Notify ExitBootServices() is called */
381 void efi_variables_boot_exit_notify(void);
382 /* Called by bootefi to initialize root node */
383 efi_status_t efi_root_node_register(void);
384 /* Called by bootefi to initialize runtime */
385 efi_status_t efi_initialize_system_table(void);
386 /* efi_runtime_detach() - detach unimplemented runtime functions */
387 void efi_runtime_detach(void);
388 /* Called by bootefi to make console interface available */
389 efi_status_t efi_console_register(void);
390 /* Called by bootefi to make all disk storage accessible as EFI objects */
391 efi_status_t efi_disk_register(void);
392 /* Create handles and protocols for the partitions of a block device */
393 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
394 const char *if_typename, int diskid,
395 const char *pdevname);
396 /* Called by bootefi to make GOP (graphical) interface available */
397 efi_status_t efi_gop_register(void);
398 /* Called by bootefi to make the network interface available */
399 efi_status_t efi_net_register(void);
400 /* Called by bootefi to make the watchdog available */
401 efi_status_t efi_watchdog_register(void);
402 efi_status_t efi_initrd_register(void);
403 /* Called by bootefi to make SMBIOS tables available */
405 * efi_acpi_register() - write out ACPI tables
407 * Called by bootefi to make ACPI tables available
409 * @return 0 if OK, -ENOMEM if no memory is available for the tables
411 efi_status_t efi_acpi_register(void);
413 * efi_smbios_register() - write out SMBIOS tables
415 * Called by bootefi to make SMBIOS tables available
417 * @return 0 if OK, -ENOMEM if no memory is available for the tables
419 efi_status_t efi_smbios_register(void);
421 struct efi_simple_file_system_protocol *
422 efi_fs_from_path(struct efi_device_path *fp);
424 /* Called by networking code to memorize the dhcp ack package */
425 void efi_net_set_dhcp_ack(void *pkt, int len);
426 /* Called by efi_set_watchdog_timer to reset the timer */
427 efi_status_t efi_set_watchdog(unsigned long timeout);
429 /* Called from places to check whether a timer expired */
430 void efi_timer_check(void);
431 /* PE loader implementation */
432 efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
433 void *efi, size_t efi_size,
434 struct efi_loaded_image *loaded_image_info);
435 /* Called once to store the pristine gd pointer */
436 void efi_save_gd(void);
437 /* Special case handler for error/abort that just tries to dtrt to get
438 * back to u-boot world */
439 void efi_restore_gd(void);
440 /* Call this to relocate the runtime section to an address space */
441 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
442 /* Call this to set the current device name */
443 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
444 /* Add a new object to the object list. */
445 void efi_add_handle(efi_handle_t obj);
447 efi_status_t efi_create_handle(efi_handle_t *handle);
449 void efi_delete_handle(efi_handle_t obj);
450 /* Call this to validate a handle and find the EFI object for it */
451 struct efi_object *efi_search_obj(const efi_handle_t handle);
453 efi_status_t EFIAPI efi_load_image(bool boot_policy,
454 efi_handle_t parent_image,
455 struct efi_device_path *file_path,
457 efi_uintn_t source_size,
458 efi_handle_t *image_handle);
460 efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
461 efi_uintn_t *exit_data_size,
464 efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
465 /* Find a protocol on a handle */
466 efi_status_t efi_search_protocol(const efi_handle_t handle,
467 const efi_guid_t *protocol_guid,
468 struct efi_handler **handler);
469 /* Install new protocol on a handle */
470 efi_status_t efi_add_protocol(const efi_handle_t handle,
471 const efi_guid_t *protocol,
472 void *protocol_interface);
473 /* Delete protocol from a handle */
474 efi_status_t efi_remove_protocol(const efi_handle_t handle,
475 const efi_guid_t *protocol,
476 void *protocol_interface);
477 /* Delete all protocols from a handle */
478 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
479 /* Install multiple protocol interfaces */
480 efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
481 (efi_handle_t *handle, ...);
482 /* Get handles that support a given protocol */
483 efi_status_t EFIAPI efi_locate_handle_buffer(
484 enum efi_locate_search_type search_type,
485 const efi_guid_t *protocol, void *search_key,
486 efi_uintn_t *no_handles, efi_handle_t **buffer);
487 /* Close an previously opened protocol interface */
488 efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
489 const efi_guid_t *protocol,
490 efi_handle_t agent_handle,
491 efi_handle_t controller_handle);
492 /* Open a protocol interface */
493 efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
494 const efi_guid_t *protocol,
495 void **protocol_interface);
496 /* Call this to create an event */
497 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
498 void (EFIAPI *notify_function) (
499 struct efi_event *event,
501 void *notify_context, efi_guid_t *group,
502 struct efi_event **event);
503 /* Call this to set a timer */
504 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
505 uint64_t trigger_time);
506 /* Call this to signal an event */
507 void efi_signal_event(struct efi_event *event);
509 /* open file system: */
510 struct efi_simple_file_system_protocol *efi_simple_file_system(
511 struct blk_desc *desc, int part, struct efi_device_path *dp);
513 /* open file from device-path: */
514 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
517 * efi_size_in_pages() - convert size in bytes to size in pages
519 * This macro returns the number of EFI memory pages required to hold 'size'
522 * @size: size in bytes
523 * Return: size in pages
525 #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
526 /* Generic EFI memory allocator, call this to get memory */
527 void *efi_alloc(uint64_t len, int memory_type);
528 /* More specific EFI memory allocator, called by EFI payloads */
529 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
531 /* EFI memory free function. */
532 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
533 /* EFI memory allocator for small allocations */
534 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
536 /* EFI pool memory free function. */
537 efi_status_t efi_free_pool(void *buffer);
538 /* Returns the EFI memory map */
539 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
540 struct efi_mem_desc *memory_map,
541 efi_uintn_t *map_key,
542 efi_uintn_t *descriptor_size,
543 uint32_t *descriptor_version);
544 /* Adds a range into the EFI memory map */
545 efi_status_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
546 bool overlap_only_ram);
547 /* Adds a conventional range into the EFI memory map */
548 efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
551 /* Called by board init to initialize the EFI drivers */
552 efi_status_t efi_driver_init(void);
553 /* Called by board init to initialize the EFI memory map */
554 int efi_memory_init(void);
555 /* Adds new or overrides configuration table entry to the system table */
556 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
557 /* Sets up a loaded image */
558 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
559 struct efi_device_path *file_path,
560 struct efi_loaded_image_obj **handle_ptr,
561 struct efi_loaded_image **info_ptr);
562 /* Print information about all loaded images */
563 void efi_print_image_infos(void *pc);
565 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
566 extern void *efi_bounce_buffer;
567 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
571 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
572 int efi_dp_match(const struct efi_device_path *a,
573 const struct efi_device_path *b);
574 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
575 struct efi_device_path **rem);
576 /* get size of the first device path instance excluding end node */
577 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
578 /* size of multi-instance device path excluding end node */
579 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
580 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
581 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
582 const struct efi_device_path *dp2);
583 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
584 const struct efi_device_path *node);
585 /* Create a device path node of given type, sub-type, length */
586 struct efi_device_path *efi_dp_create_device_node(const u8 type,
589 /* Append device path instance */
590 struct efi_device_path *efi_dp_append_instance(
591 const struct efi_device_path *dp,
592 const struct efi_device_path *dpi);
593 /* Get next device path instance */
594 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
596 /* Check if a device path contains muliple instances */
597 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
599 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
600 /* Create a device node for a block device partition. */
601 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
602 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
604 struct efi_device_path *efi_dp_from_eth(void);
605 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
606 uint64_t start_address,
607 uint64_t end_address);
608 /* Determine the last device path node that is not the end node. */
609 const struct efi_device_path *efi_dp_last_node(
610 const struct efi_device_path *dp);
611 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
612 struct efi_device_path **device_path,
613 struct efi_device_path **file_path);
614 efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
616 struct efi_device_path **device,
617 struct efi_device_path **file);
619 #define EFI_DP_TYPE(_dp, _type, _subtype) \
620 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
621 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
624 * Use these to indicate that your code / data should go into the EFI runtime
625 * section and thus still be available when the OS is running
627 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
628 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
630 /* Indicate supported runtime services */
631 efi_status_t efi_init_runtime_supported(void);
633 /* Update CRC32 in table header */
634 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
636 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
637 * to make it available at runtime */
638 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
640 /* Boards may provide the functions below to implement RTS functionality */
642 void __efi_runtime EFIAPI efi_reset_system(
643 enum efi_reset_type reset_type,
644 efi_status_t reset_status,
645 unsigned long data_size, void *reset_data);
647 /* Architecture specific initialization of the EFI subsystem */
648 efi_status_t efi_reset_system_init(void);
650 efi_status_t __efi_runtime EFIAPI efi_get_time(
651 struct efi_time *time,
652 struct efi_time_cap *capabilities);
654 efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
656 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
658 * Entry point for the tests of the EFI API.
659 * It is called by 'bootefi selftest'
661 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
662 struct efi_system_table *systab);
665 efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
666 const efi_guid_t *vendor, u32 *attributes,
667 efi_uintn_t *data_size, void *data);
668 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
671 efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
672 const efi_guid_t *vendor, u32 attributes,
673 efi_uintn_t data_size, const void *data);
675 efi_status_t EFIAPI efi_query_variable_info(
676 u32 attributes, u64 *maximum_variable_storage_size,
677 u64 *remaining_variable_storage_size,
678 u64 *maximum_variable_size);
681 * See section 3.1.3 in the v2.7 UEFI spec for more details on
682 * the layout of EFI_LOAD_OPTION. In short it is:
684 * typedef struct _EFI_LOAD_OPTION {
686 * UINT16 FilePathListLength;
687 * // CHAR16 Description[]; <-- variable length, NULL terminated
688 * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
689 * <-- FilePathListLength bytes
690 * // UINT8 OptionalData[];
693 struct efi_load_option {
695 u16 file_path_length;
697 struct efi_device_path *file_path;
698 const u8 *optional_data;
701 void efi_deserialize_load_option(struct efi_load_option *lo, u8 *data);
702 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
703 efi_status_t efi_bootmgr_load(efi_handle_t *handle);
705 #ifdef CONFIG_EFI_SECURE_BOOT
709 * efi_image_regions - A list of memory regions
711 * @max: Maximum number of regions
712 * @num: Number of regions
713 * @reg: array of regions
715 struct efi_image_regions {
718 struct image_region reg[];
722 * efi_sig_data - A decoded data of struct efi_signature_data
724 * This structure represents an internal form of signature in
725 * signature database. A listed list may represent a signature list.
727 * @next: Pointer to next entry
728 * @onwer: Signature owner
729 * @data: Pointer to signature data
730 * @size: Size of signature data
732 struct efi_sig_data {
733 struct efi_sig_data *next;
740 * efi_signature_store - A decoded data of signature database
742 * This structure represents an internal form of signature database.
744 * @next: Pointer to next entry
745 * @sig_type: Signature type
746 * @sig_data_list: Pointer to signature list
748 struct efi_signature_store {
749 struct efi_signature_store *next;
751 struct efi_sig_data *sig_data_list;
754 struct x509_certificate;
755 struct pkcs7_message;
757 bool efi_signature_verify_cert(struct x509_certificate *cert,
758 struct efi_signature_store *dbx);
759 bool efi_signature_verify_signers(struct pkcs7_message *msg,
760 struct efi_signature_store *dbx);
761 bool efi_signature_verify_with_sigdb(struct efi_image_regions *regs,
762 struct pkcs7_message *msg,
763 struct efi_signature_store *db,
764 struct x509_certificate **cert);
766 efi_status_t efi_image_region_add(struct efi_image_regions *regs,
767 const void *start, const void *end,
770 void efi_sigstore_free(struct efi_signature_store *sigstore);
771 struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
773 bool efi_secure_boot_enabled(void);
775 bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
776 WIN_CERTIFICATE **auth, size_t *auth_len);
777 #endif /* CONFIG_EFI_SECURE_BOOT */
779 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
781 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
782 #define __efi_runtime_data
783 #define __efi_runtime
784 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
789 /* No loader configured, stub out EFI_ENTRY */
790 static inline void efi_restore_gd(void) { }
791 static inline void efi_set_bootdev(const char *dev, const char *devnr,
792 const char *path) { }
793 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
794 static inline void efi_print_image_infos(void *pc) { }
796 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
798 #endif /* _EFI_LOADER_H */