1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * EFI application loader
5 * Copyright (c) 2016 Alexander Graf
9 #define _EFI_LOADER_H 1
21 static inline int guidcmp(const void *g1, const void *g2)
23 return memcmp(g1, g2, sizeof(efi_guid_t));
26 static inline void *guidcpy(void *dst, const void *src)
28 return memcpy(dst, src, sizeof(efi_guid_t));
31 /* No need for efi loader support in SPL */
32 #if CONFIG_IS_ENABLED(EFI_LOADER)
34 #include <linux/list.h>
35 #include <linux/oid_registry.h>
37 /* Maximum number of configuration tables */
38 #define EFI_MAX_CONFIGURATION_TABLES 16
40 /* GUID used by the root node */
42 EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
43 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
44 /* GUID used as host device on sandbox */
45 #define U_BOOT_HOST_DEV_GUID \
46 EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
47 0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
48 /* GUID used as root for virtio devices */
49 #define U_BOOT_VIRTIO_DEV_GUID \
50 EFI_GUID(0x63293792, 0xadf5, 0x9325, \
51 0xb9, 0x9f, 0x4e, 0x0e, 0x45, 0x5c, 0x1b, 0x1e)
53 /* Use internal device tree when starting UEFI application */
54 #define EFI_FDT_USE_INTERNAL NULL
57 extern efi_handle_t efi_root;
59 /* Set to EFI_SUCCESS when initialized */
60 extern efi_status_t efi_obj_list_initialized;
62 /* Flag used by the selftest to avoid detaching devices in ExitBootServices() */
63 extern bool efi_st_keep_devices;
65 /* EFI system partition */
66 extern struct efi_system_partition {
70 } efi_system_partition;
72 int __efi_entry_check(void);
73 int __efi_exit_check(void);
74 const char *__efi_nesting(void);
75 const char *__efi_nesting_inc(void);
76 const char *__efi_nesting_dec(void);
79 * Enter the u-boot world from UEFI:
81 #define EFI_ENTRY(format, ...) do { \
82 assert(__efi_entry_check()); \
83 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
84 __func__, ##__VA_ARGS__); \
88 * Exit the u-boot world back to UEFI:
90 #define EFI_EXIT(ret) ({ \
91 typeof(ret) _r = ret; \
92 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
93 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
94 assert(__efi_exit_check()); \
99 * Call non-void UEFI function from u-boot and retrieve return value:
101 #define EFI_CALL(exp) ({ \
102 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
103 assert(__efi_exit_check()); \
104 typeof(exp) _r = exp; \
105 assert(__efi_entry_check()); \
106 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
107 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
112 * Call void UEFI function from u-boot:
114 #define EFI_CALL_VOID(exp) do { \
115 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
116 assert(__efi_exit_check()); \
118 assert(__efi_entry_check()); \
119 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
123 * Write an indented message with EFI prefix
125 #define EFI_PRINT(format, ...) ({ \
126 debug("%sEFI: " format, __efi_nesting(), \
130 #ifdef CONFIG_SYS_CACHELINE_SIZE
131 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
133 /* Just use the greatest cache flush alignment requirement I'm aware of */
134 #define EFI_CACHELINE_SIZE 128
137 /* Key identifying current memory map */
138 extern efi_uintn_t efi_memory_map_key;
140 extern struct efi_runtime_services efi_runtime_services;
141 extern struct efi_system_table systab;
143 extern struct efi_simple_text_output_protocol efi_con_out;
144 extern struct efi_simple_text_input_protocol efi_con_in;
145 extern struct efi_console_control_protocol efi_console_control;
146 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
147 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
148 extern const struct efi_device_path_utilities_protocol
149 efi_device_path_utilities;
150 /* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */
151 extern const struct efi_unicode_collation_protocol
152 efi_unicode_collation_protocol;
153 /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
154 extern const struct efi_unicode_collation_protocol
155 efi_unicode_collation_protocol2;
156 extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
157 extern const struct efi_hii_config_access_protocol efi_hii_config_access;
158 extern const struct efi_hii_database_protocol efi_hii_database;
159 extern const struct efi_hii_string_protocol efi_hii_string;
161 uint16_t *efi_dp_str(struct efi_device_path *dp);
163 /* GUID of the U-Boot root node */
164 extern const efi_guid_t efi_u_boot_guid;
165 #ifdef CONFIG_SANDBOX
166 /* GUID of U-Boot host device on sandbox */
167 extern const efi_guid_t efi_guid_host_dev;
169 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
170 extern const efi_guid_t efi_block_io_guid;
171 extern const efi_guid_t efi_global_variable_guid;
172 extern const efi_guid_t efi_guid_console_control;
173 extern const efi_guid_t efi_guid_device_path;
174 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
175 extern const efi_guid_t efi_guid_driver_binding_protocol;
176 /* event group ExitBootServices() invoked */
177 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
178 /* event group SetVirtualAddressMap() invoked */
179 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
180 /* event group memory map changed */
181 extern const efi_guid_t efi_guid_event_group_memory_map_change;
182 /* event group boot manager about to boot */
183 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
184 /* event group ResetSystem() invoked (before ExitBootServices) */
185 extern const efi_guid_t efi_guid_event_group_reset_system;
186 /* GUID of the device tree table */
187 extern const efi_guid_t efi_guid_fdt;
188 extern const efi_guid_t efi_guid_loaded_image;
189 extern const efi_guid_t efi_guid_loaded_image_device_path;
190 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
191 extern const efi_guid_t efi_simple_file_system_protocol_guid;
192 extern const efi_guid_t efi_file_info_guid;
193 /* GUID for file system information */
194 extern const efi_guid_t efi_file_system_info_guid;
195 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
196 /* GUID of the deprecated Unicode collation protocol */
197 extern const efi_guid_t efi_guid_unicode_collation_protocol;
198 /* GUIDs of the Load File and Load File2 protocol */
199 extern const efi_guid_t efi_guid_load_file_protocol;
200 extern const efi_guid_t efi_guid_load_file2_protocol;
201 /* GUID of the Unicode collation protocol */
202 extern const efi_guid_t efi_guid_unicode_collation_protocol2;
203 extern const efi_guid_t efi_guid_hii_config_routing_protocol;
204 extern const efi_guid_t efi_guid_hii_config_access_protocol;
205 extern const efi_guid_t efi_guid_hii_database_protocol;
206 extern const efi_guid_t efi_guid_hii_string_protocol;
207 /* GUIDs for authentication */
208 extern const efi_guid_t efi_guid_image_security_database;
209 extern const efi_guid_t efi_guid_sha256;
210 extern const efi_guid_t efi_guid_cert_x509;
211 extern const efi_guid_t efi_guid_cert_x509_sha256;
212 extern const efi_guid_t efi_guid_cert_type_pkcs7;
214 /* GUID of RNG protocol */
215 extern const efi_guid_t efi_guid_rng_protocol;
216 /* GUID of capsule update result */
217 extern const efi_guid_t efi_guid_capsule_report;
218 /* GUID of firmware management protocol */
219 extern const efi_guid_t efi_guid_firmware_management_protocol;
221 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
222 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
225 * struct efi_open_protocol_info_item - open protocol info item
227 * When a protocol is opened a open protocol info entry is created.
228 * These are maintained in a list.
230 * @link: link to the list of open protocol info entries of a protocol
231 * @info: information about the opening of a protocol
233 struct efi_open_protocol_info_item {
234 struct list_head link;
235 struct efi_open_protocol_info_entry info;
239 * struct efi_handler - single protocol interface of a handle
241 * When the UEFI payload wants to open a protocol on an object to get its
242 * interface (usually a struct with callback functions), this struct maps the
243 * protocol GUID to the respective protocol interface
245 * @link: link to the list of protocols of a handle
246 * @guid: GUID of the protocol
247 * @protocol_interface: protocol interface
248 * @open_infos link to the list of open protocol info items
251 struct list_head link;
252 const efi_guid_t *guid;
253 void *protocol_interface;
254 struct list_head open_infos;
258 * enum efi_object_type - type of EFI object
260 * In UnloadImage we must be able to identify if the handle relates to a
263 enum efi_object_type {
264 EFI_OBJECT_TYPE_UNDEFINED = 0,
265 EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
266 EFI_OBJECT_TYPE_LOADED_IMAGE,
267 EFI_OBJECT_TYPE_STARTED_IMAGE,
271 * struct efi_object - dereferenced EFI handle
273 * @link: pointers to put the handle into a linked list
274 * @protocols: linked list with the protocol interfaces installed on this
277 * UEFI offers a flexible and expandable object model. The objects in the UEFI
278 * API are devices, drivers, and loaded images. struct efi_object is our storage
279 * structure for these objects.
281 * When including this structure into a larger structure always put it first so
282 * that when deleting a handle the whole encompassing structure can be freed.
284 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
285 * has been created for such pointers.
288 /* Every UEFI object is part of a global object list */
289 struct list_head link;
290 /* The list of protocols */
291 struct list_head protocols;
292 enum efi_object_type type;
295 enum efi_image_auth_status {
296 EFI_IMAGE_AUTH_FAILED = 0,
297 EFI_IMAGE_AUTH_PASSED,
301 * struct efi_loaded_image_obj - handle of a loaded image
303 * @header: EFI object header
304 * @exit_status: exit status passed to Exit()
305 * @exit_data_size: exit data size passed to Exit()
306 * @exit_data: exit data passed to Exit()
307 * @exit_jmp: long jump buffer for returning from started image
308 * @entry: entry address of the relocated image
309 * @image_type: indicates if the image is an applicition or a driver
310 * @auth_status: indicates if the image is authenticated
312 struct efi_loaded_image_obj {
313 struct efi_object header;
314 efi_status_t *exit_status;
315 efi_uintn_t *exit_data_size;
317 struct jmp_buf_data *exit_jmp;
318 EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
319 struct efi_system_table *st);
321 enum efi_image_auth_status auth_status;
327 * @link: Link to list of all events
328 * @queue_link: Link to the list of queued events
329 * @type: Type of event, see efi_create_event
330 * @notify_tpl: Task priority level of notifications
331 * @nofify_function: Function to call when the event is triggered
332 * @notify_context: Data to be passed to the notify function
333 * @group: Event group
334 * @trigger_time: Period of the timer
335 * @trigger_next: Next time to trigger the timer
336 * @trigger_type: Type of timer, see efi_set_timer
337 * @is_signaled: The event occurred. The event is in the signaled state.
340 struct list_head link;
341 struct list_head queue_link;
343 efi_uintn_t notify_tpl;
344 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
345 void *notify_context;
346 const efi_guid_t *group;
349 enum efi_timer_delay trigger_type;
353 /* This list contains all UEFI objects we know of */
354 extern struct list_head efi_obj_list;
355 /* List of all events */
356 extern struct list_head efi_events;
359 * struct efi_protocol_notification - handle for notified protocol
361 * When a protocol interface is installed for which an event was registered with
362 * the RegisterProtocolNotify() service this structure is used to hold the
363 * handle on which the protocol interface was installed.
365 * @link: link to list of all handles notified for this event
366 * @handle: handle on which the notified protocol interface was installed
368 struct efi_protocol_notification {
369 struct list_head link;
374 * efi_register_notify_event - event registered by RegisterProtocolNotify()
376 * The address of this structure serves as registration value.
378 * @link: link to list of all registered events
379 * @event: registered event. The same event may registered for multiple
381 * @protocol: protocol for which the event is registered
382 * @handles: linked list of all handles on which the notified protocol was
385 struct efi_register_notify_event {
386 struct list_head link;
387 struct efi_event *event;
389 struct list_head handles;
392 /* List of all events registered by RegisterProtocolNotify() */
393 extern struct list_head efi_register_notify_events;
395 /* Initialize efi execution environment */
396 efi_status_t efi_init_obj_list(void);
397 /* Install device tree */
398 efi_status_t efi_install_fdt(void *fdt);
399 /* Run loaded UEFI image */
400 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
401 /* Initialize variable services */
402 efi_status_t efi_init_variables(void);
403 /* Notify ExitBootServices() is called */
404 void efi_variables_boot_exit_notify(void);
405 /* Called by bootefi to initialize root node */
406 efi_status_t efi_root_node_register(void);
407 /* Called by bootefi to initialize runtime */
408 efi_status_t efi_initialize_system_table(void);
409 /* efi_runtime_detach() - detach unimplemented runtime functions */
410 void efi_runtime_detach(void);
411 /* efi_convert_pointer() - convert pointer to virtual address */
412 efi_status_t EFIAPI efi_convert_pointer(efi_uintn_t debug_disposition,
414 /* Called by bootefi to make console interface available */
415 efi_status_t efi_console_register(void);
416 /* Called by bootefi to make all disk storage accessible as EFI objects */
417 efi_status_t efi_disk_register(void);
418 /* Called by efi_init_obj_list() to install EFI_RNG_PROTOCOL */
419 efi_status_t efi_rng_register(void);
420 /* Called by efi_init_obj_list() to install EFI_TCG2_PROTOCOL */
421 efi_status_t efi_tcg2_register(void);
422 /* Create handles and protocols for the partitions of a block device */
423 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
424 const char *if_typename, int diskid,
425 const char *pdevname);
426 /* Check if it is EFI system partition */
427 bool efi_disk_is_system_part(efi_handle_t handle);
428 /* Called by bootefi to make GOP (graphical) interface available */
429 efi_status_t efi_gop_register(void);
430 /* Called by bootefi to make the network interface available */
431 efi_status_t efi_net_register(void);
432 /* Called by bootefi to make the watchdog available */
433 efi_status_t efi_watchdog_register(void);
434 efi_status_t efi_initrd_register(void);
435 /* Called by bootefi to make SMBIOS tables available */
437 * efi_acpi_register() - write out ACPI tables
439 * Called by bootefi to make ACPI tables available
441 * @return 0 if OK, -ENOMEM if no memory is available for the tables
443 efi_status_t efi_acpi_register(void);
445 * efi_smbios_register() - write out SMBIOS tables
447 * Called by bootefi to make SMBIOS tables available
449 * @return 0 if OK, -ENOMEM if no memory is available for the tables
451 efi_status_t efi_smbios_register(void);
453 struct efi_simple_file_system_protocol *
454 efi_fs_from_path(struct efi_device_path *fp);
456 /* Called by networking code to memorize the dhcp ack package */
457 void efi_net_set_dhcp_ack(void *pkt, int len);
458 /* Called by efi_set_watchdog_timer to reset the timer */
459 efi_status_t efi_set_watchdog(unsigned long timeout);
461 /* Called from places to check whether a timer expired */
462 void efi_timer_check(void);
463 /* Check if a buffer contains a PE-COFF image */
464 efi_status_t efi_check_pe(void *buffer, size_t size, void **nt_header);
465 /* PE loader implementation */
466 efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
467 void *efi, size_t efi_size,
468 struct efi_loaded_image *loaded_image_info);
469 /* Called once to store the pristine gd pointer */
470 void efi_save_gd(void);
471 /* Special case handler for error/abort that just tries to dtrt to get
472 * back to u-boot world */
473 void efi_restore_gd(void);
474 /* Call this to relocate the runtime section to an address space */
475 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
476 /* Call this to set the current device name */
477 void efi_set_bootdev(const char *dev, const char *devnr, const char *path,
478 void *buffer, size_t buffer_size);
479 /* Add a new object to the object list. */
480 void efi_add_handle(efi_handle_t obj);
482 efi_status_t efi_create_handle(efi_handle_t *handle);
484 void efi_delete_handle(efi_handle_t obj);
485 /* Call this to validate a handle and find the EFI object for it */
486 struct efi_object *efi_search_obj(const efi_handle_t handle);
488 efi_status_t EFIAPI efi_load_image(bool boot_policy,
489 efi_handle_t parent_image,
490 struct efi_device_path *file_path,
492 efi_uintn_t source_size,
493 efi_handle_t *image_handle);
495 efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
496 efi_uintn_t *exit_data_size,
499 efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
500 /* Find a protocol on a handle */
501 efi_status_t efi_search_protocol(const efi_handle_t handle,
502 const efi_guid_t *protocol_guid,
503 struct efi_handler **handler);
504 /* Install new protocol on a handle */
505 efi_status_t efi_add_protocol(const efi_handle_t handle,
506 const efi_guid_t *protocol,
507 void *protocol_interface);
509 efi_status_t efi_protocol_open(struct efi_handler *handler,
510 void **protocol_interface, void *agent_handle,
511 void *controller_handle, uint32_t attributes);
513 /* Delete protocol from a handle */
514 efi_status_t efi_remove_protocol(const efi_handle_t handle,
515 const efi_guid_t *protocol,
516 void *protocol_interface);
517 /* Delete all protocols from a handle */
518 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
519 /* Install multiple protocol interfaces */
520 efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
521 (efi_handle_t *handle, ...);
522 /* Get handles that support a given protocol */
523 efi_status_t EFIAPI efi_locate_handle_buffer(
524 enum efi_locate_search_type search_type,
525 const efi_guid_t *protocol, void *search_key,
526 efi_uintn_t *no_handles, efi_handle_t **buffer);
527 /* Close an previously opened protocol interface */
528 efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
529 const efi_guid_t *protocol,
530 efi_handle_t agent_handle,
531 efi_handle_t controller_handle);
532 /* Open a protocol interface */
533 efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
534 const efi_guid_t *protocol,
535 void **protocol_interface);
536 /* Call this to create an event */
537 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
538 void (EFIAPI *notify_function) (
539 struct efi_event *event,
541 void *notify_context, efi_guid_t *group,
542 struct efi_event **event);
543 /* Call this to set a timer */
544 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
545 uint64_t trigger_time);
546 /* Call this to signal an event */
547 void efi_signal_event(struct efi_event *event);
549 /* open file system: */
550 struct efi_simple_file_system_protocol *efi_simple_file_system(
551 struct blk_desc *desc, int part, struct efi_device_path *dp);
553 /* open file from device-path: */
554 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
557 * efi_size_in_pages() - convert size in bytes to size in pages
559 * This macro returns the number of EFI memory pages required to hold 'size'
562 * @size: size in bytes
563 * Return: size in pages
565 #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
566 /* Generic EFI memory allocator, call this to get memory */
567 void *efi_alloc(uint64_t len, int memory_type);
568 /* More specific EFI memory allocator, called by EFI payloads */
569 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
571 /* EFI memory free function. */
572 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
573 /* EFI memory allocator for small allocations */
574 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
576 /* EFI pool memory free function. */
577 efi_status_t efi_free_pool(void *buffer);
578 /* Returns the EFI memory map */
579 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
580 struct efi_mem_desc *memory_map,
581 efi_uintn_t *map_key,
582 efi_uintn_t *descriptor_size,
583 uint32_t *descriptor_version);
584 /* Adds a range into the EFI memory map */
585 efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type);
586 /* Adds a conventional range into the EFI memory map */
587 efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
590 /* Called by board init to initialize the EFI drivers */
591 efi_status_t efi_driver_init(void);
592 /* Called by board init to initialize the EFI memory map */
593 int efi_memory_init(void);
594 /* Adds new or overrides configuration table entry to the system table */
595 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
596 /* Sets up a loaded image */
597 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
598 struct efi_device_path *file_path,
599 struct efi_loaded_image_obj **handle_ptr,
600 struct efi_loaded_image **info_ptr);
601 /* Print information about all loaded images */
602 void efi_print_image_infos(void *pc);
604 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
605 extern void *efi_bounce_buffer;
606 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
610 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
611 int efi_dp_match(const struct efi_device_path *a,
612 const struct efi_device_path *b);
613 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
614 struct efi_device_path **rem);
615 /* get size of the first device path instance excluding end node */
616 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
617 /* size of multi-instance device path excluding end node */
618 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
619 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
620 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
621 const struct efi_device_path *dp2);
622 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
623 const struct efi_device_path *node);
624 /* Create a device path node of given type, sub-type, length */
625 struct efi_device_path *efi_dp_create_device_node(const u8 type,
628 /* Append device path instance */
629 struct efi_device_path *efi_dp_append_instance(
630 const struct efi_device_path *dp,
631 const struct efi_device_path *dpi);
632 /* Get next device path instance */
633 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
635 /* Check if a device path contains muliple instances */
636 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
638 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
639 /* Create a device node for a block device partition. */
640 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
641 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
643 struct efi_device_path *efi_dp_from_eth(void);
644 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
645 uint64_t start_address,
646 uint64_t end_address);
647 /* Determine the last device path node that is not the end node. */
648 const struct efi_device_path *efi_dp_last_node(
649 const struct efi_device_path *dp);
650 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
651 struct efi_device_path **device_path,
652 struct efi_device_path **file_path);
653 efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
655 struct efi_device_path **device,
656 struct efi_device_path **file);
657 ssize_t efi_dp_check_length(const struct efi_device_path *dp,
658 const size_t maxlen);
660 #define EFI_DP_TYPE(_dp, _type, _subtype) \
661 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
662 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
665 * Use these to indicate that your code / data should go into the EFI runtime
666 * section and thus still be available when the OS is running
668 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
669 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
671 /* Indicate supported runtime services */
672 efi_status_t efi_init_runtime_supported(void);
674 /* Update CRC32 in table header */
675 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
677 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
678 * to make it available at runtime */
679 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
681 /* Boards may provide the functions below to implement RTS functionality */
683 void __efi_runtime EFIAPI efi_reset_system(
684 enum efi_reset_type reset_type,
685 efi_status_t reset_status,
686 unsigned long data_size, void *reset_data);
688 /* Architecture specific initialization of the EFI subsystem */
689 efi_status_t efi_reset_system_init(void);
691 efi_status_t __efi_runtime EFIAPI efi_get_time(
692 struct efi_time *time,
693 struct efi_time_cap *capabilities);
695 efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
697 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
699 * Entry point for the tests of the EFI API.
700 * It is called by 'bootefi selftest'
702 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
703 struct efi_system_table *systab);
706 efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
707 const efi_guid_t *vendor, u32 *attributes,
708 efi_uintn_t *data_size, void *data);
709 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
712 efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
713 const efi_guid_t *vendor, u32 attributes,
714 efi_uintn_t data_size, const void *data);
716 efi_status_t EFIAPI efi_query_variable_info(
717 u32 attributes, u64 *maximum_variable_storage_size,
718 u64 *remaining_variable_storage_size,
719 u64 *maximum_variable_size);
722 * See section 3.1.3 in the v2.7 UEFI spec for more details on
723 * the layout of EFI_LOAD_OPTION. In short it is:
725 * typedef struct _EFI_LOAD_OPTION {
727 * UINT16 FilePathListLength;
728 * // CHAR16 Description[]; <-- variable length, NULL terminated
729 * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
730 * <-- FilePathListLength bytes
731 * // UINT8 OptionalData[];
734 struct efi_load_option {
736 u16 file_path_length;
738 struct efi_device_path *file_path;
739 const u8 *optional_data;
742 efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
744 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
745 efi_status_t efi_set_load_options(efi_handle_t handle,
746 efi_uintn_t load_options_size,
748 efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options);
751 * efi_image_regions - A list of memory regions
753 * @max: Maximum number of regions
754 * @num: Number of regions
755 * @reg: array of regions
757 struct efi_image_regions {
760 struct image_region reg[];
764 * efi_sig_data - A decoded data of struct efi_signature_data
766 * This structure represents an internal form of signature in
767 * signature database. A listed list may represent a signature list.
769 * @next: Pointer to next entry
770 * @onwer: Signature owner
771 * @data: Pointer to signature data
772 * @size: Size of signature data
774 struct efi_sig_data {
775 struct efi_sig_data *next;
782 * efi_signature_store - A decoded data of signature database
784 * This structure represents an internal form of signature database.
786 * @next: Pointer to next entry
787 * @sig_type: Signature type
788 * @sig_data_list: Pointer to signature list
790 struct efi_signature_store {
791 struct efi_signature_store *next;
793 struct efi_sig_data *sig_data_list;
796 struct x509_certificate;
797 struct pkcs7_message;
799 bool efi_signature_lookup_digest(struct efi_image_regions *regs,
800 struct efi_signature_store *db);
801 bool efi_signature_verify(struct efi_image_regions *regs,
802 struct pkcs7_message *msg,
803 struct efi_signature_store *db,
804 struct efi_signature_store *dbx);
805 static inline bool efi_signature_verify_one(struct efi_image_regions *regs,
806 struct pkcs7_message *msg,
807 struct efi_signature_store *db)
809 return efi_signature_verify(regs, msg, db, NULL);
811 bool efi_signature_check_signers(struct pkcs7_message *msg,
812 struct efi_signature_store *dbx);
814 efi_status_t efi_image_region_add(struct efi_image_regions *regs,
815 const void *start, const void *end,
818 void efi_sigstore_free(struct efi_signature_store *sigstore);
819 struct efi_signature_store *efi_build_signature_store(void *sig_list,
821 struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
823 bool efi_secure_boot_enabled(void);
825 bool efi_capsule_auth_enabled(void);
827 bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
828 WIN_CERTIFICATE **auth, size_t *auth_len);
830 struct pkcs7_message *efi_parse_pkcs7_header(const void *buf,
834 /* runtime implementation of memcpy() */
835 void efi_memcpy_runtime(void *dest, const void *src, size_t n);
837 /* commonly used helper function */
838 u16 *efi_create_indexed_name(u16 *buffer, size_t buffer_size, const char *name,
841 extern const struct efi_firmware_management_protocol efi_fmp_fit;
842 extern const struct efi_firmware_management_protocol efi_fmp_raw;
845 efi_status_t EFIAPI efi_update_capsule(
846 struct efi_capsule_header **capsule_header_array,
847 efi_uintn_t capsule_count,
848 u64 scatter_gather_list);
849 efi_status_t EFIAPI efi_query_capsule_caps(
850 struct efi_capsule_header **capsule_header_array,
851 efi_uintn_t capsule_count,
852 u64 *maximum_capsule_size,
855 efi_status_t efi_capsule_authenticate(const void *capsule,
856 efi_uintn_t capsule_size,
857 void **image, efi_uintn_t *image_size);
859 #define EFI_CAPSULE_DIR L"\\EFI\\UpdateCapsule\\"
861 /* Hook at initialization */
862 efi_status_t efi_launch_capsules(void);
864 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
866 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
867 #define __efi_runtime_data
868 #define __efi_runtime
869 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
874 /* No loader configured, stub out EFI_ENTRY */
875 static inline void efi_restore_gd(void) { }
876 static inline void efi_set_bootdev(const char *dev, const char *devnr,
877 const char *path, void *buffer,
878 size_t buffer_size) { }
879 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
880 static inline void efi_print_image_infos(void *pc) { }
881 static inline efi_status_t efi_launch_capsules(void)
886 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
888 #endif /* _EFI_LOADER_H */