1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * EFI application loader
5 * Copyright (c) 2016 Alexander Graf
9 #define _EFI_LOADER_H 1
22 static inline int guidcmp(const void *g1, const void *g2)
24 return memcmp(g1, g2, sizeof(efi_guid_t));
27 static inline void *guidcpy(void *dst, const void *src)
29 return memcpy(dst, src, sizeof(efi_guid_t));
32 /* No need for efi loader support in SPL */
33 #if CONFIG_IS_ENABLED(EFI_LOADER)
35 #include <linux/list.h>
36 #include <linux/oid_registry.h>
38 /* Maximum number of configuration tables */
39 #define EFI_MAX_CONFIGURATION_TABLES 16
41 /* GUID used by the root node */
43 EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
44 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
45 /* GUID used as host device on sandbox */
46 #define U_BOOT_HOST_DEV_GUID \
47 EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
48 0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
49 /* GUID used as root for virtio devices */
50 #define U_BOOT_VIRTIO_DEV_GUID \
51 EFI_GUID(0x63293792, 0xadf5, 0x9325, \
52 0xb9, 0x9f, 0x4e, 0x0e, 0x45, 0x5c, 0x1b, 0x1e)
54 /* Use internal device tree when starting UEFI application */
55 #define EFI_FDT_USE_INTERNAL NULL
58 extern efi_handle_t efi_root;
60 /* Set to EFI_SUCCESS when initialized */
61 extern efi_status_t efi_obj_list_initialized;
63 /* Flag used by the selftest to avoid detaching devices in ExitBootServices() */
64 extern bool efi_st_keep_devices;
66 /* EFI system partition */
67 extern struct efi_system_partition {
71 } efi_system_partition;
73 int __efi_entry_check(void);
74 int __efi_exit_check(void);
75 const char *__efi_nesting(void);
76 const char *__efi_nesting_inc(void);
77 const char *__efi_nesting_dec(void);
80 * Enter the u-boot world from UEFI:
82 #define EFI_ENTRY(format, ...) do { \
83 assert(__efi_entry_check()); \
84 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
85 __func__, ##__VA_ARGS__); \
89 * Exit the u-boot world back to UEFI:
91 #define EFI_EXIT(ret) ({ \
92 typeof(ret) _r = ret; \
93 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
94 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
95 assert(__efi_exit_check()); \
100 * Call non-void UEFI function from u-boot and retrieve return value:
102 #define EFI_CALL(exp) ({ \
103 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
104 assert(__efi_exit_check()); \
105 typeof(exp) _r = exp; \
106 assert(__efi_entry_check()); \
107 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
108 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
113 * Call void UEFI function from u-boot:
115 #define EFI_CALL_VOID(exp) do { \
116 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
117 assert(__efi_exit_check()); \
119 assert(__efi_entry_check()); \
120 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
124 * Write an indented message with EFI prefix
126 #define EFI_PRINT(format, ...) ({ \
127 debug("%sEFI: " format, __efi_nesting(), \
131 #ifdef CONFIG_SYS_CACHELINE_SIZE
132 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
134 /* Just use the greatest cache flush alignment requirement I'm aware of */
135 #define EFI_CACHELINE_SIZE 128
138 /* Key identifying current memory map */
139 extern efi_uintn_t efi_memory_map_key;
141 extern struct efi_runtime_services efi_runtime_services;
142 extern struct efi_system_table systab;
144 extern struct efi_simple_text_output_protocol efi_con_out;
145 extern struct efi_simple_text_input_protocol efi_con_in;
146 extern struct efi_console_control_protocol efi_console_control;
147 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
148 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
149 extern const struct efi_device_path_utilities_protocol
150 efi_device_path_utilities;
151 /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
152 extern const struct efi_unicode_collation_protocol
153 efi_unicode_collation_protocol2;
154 extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
155 extern const struct efi_hii_config_access_protocol efi_hii_config_access;
156 extern const struct efi_hii_database_protocol efi_hii_database;
157 extern const struct efi_hii_string_protocol efi_hii_string;
159 uint16_t *efi_dp_str(struct efi_device_path *dp);
161 /* GUID of the U-Boot root node */
162 extern const efi_guid_t efi_u_boot_guid;
163 #ifdef CONFIG_SANDBOX
164 /* GUID of U-Boot host device on sandbox */
165 extern const efi_guid_t efi_guid_host_dev;
167 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
168 extern const efi_guid_t efi_block_io_guid;
169 extern const efi_guid_t efi_global_variable_guid;
170 extern const efi_guid_t efi_guid_console_control;
171 extern const efi_guid_t efi_guid_device_path;
172 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
173 extern const efi_guid_t efi_guid_driver_binding_protocol;
174 /* event group ExitBootServices() invoked */
175 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
176 /* event group SetVirtualAddressMap() invoked */
177 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
178 /* event group memory map changed */
179 extern const efi_guid_t efi_guid_event_group_memory_map_change;
180 /* event group boot manager about to boot */
181 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
182 /* event group ResetSystem() invoked (before ExitBootServices) */
183 extern const efi_guid_t efi_guid_event_group_reset_system;
184 /* GUID of the device tree table */
185 extern const efi_guid_t efi_guid_fdt;
186 extern const efi_guid_t efi_guid_loaded_image;
187 extern const efi_guid_t efi_guid_loaded_image_device_path;
188 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
189 extern const efi_guid_t efi_simple_file_system_protocol_guid;
190 extern const efi_guid_t efi_file_info_guid;
191 /* GUID for file system information */
192 extern const efi_guid_t efi_file_system_info_guid;
193 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
194 /* GUID of the deprecated Unicode collation protocol */
195 extern const efi_guid_t efi_guid_unicode_collation_protocol;
196 /* GUIDs of the Load File and Load File2 protocol */
197 extern const efi_guid_t efi_guid_load_file_protocol;
198 extern const efi_guid_t efi_guid_load_file2_protocol;
199 /* GUID of the Unicode collation protocol */
200 extern const efi_guid_t efi_guid_unicode_collation_protocol2;
201 extern const efi_guid_t efi_guid_hii_config_routing_protocol;
202 extern const efi_guid_t efi_guid_hii_config_access_protocol;
203 extern const efi_guid_t efi_guid_hii_database_protocol;
204 extern const efi_guid_t efi_guid_hii_string_protocol;
205 /* GUIDs for authentication */
206 extern const efi_guid_t efi_guid_image_security_database;
207 extern const efi_guid_t efi_guid_sha256;
208 extern const efi_guid_t efi_guid_cert_x509;
209 extern const efi_guid_t efi_guid_cert_x509_sha256;
210 extern const efi_guid_t efi_guid_cert_type_pkcs7;
212 /* GUID of RNG protocol */
213 extern const efi_guid_t efi_guid_rng_protocol;
214 /* GUID of capsule update result */
215 extern const efi_guid_t efi_guid_capsule_report;
216 /* GUID of firmware management protocol */
217 extern const efi_guid_t efi_guid_firmware_management_protocol;
218 /* GUID for the ESRT */
219 extern const efi_guid_t efi_esrt_guid;
221 extern char __efi_runtime_start[], __efi_runtime_stop[];
222 extern char __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: undefined image type */
265 EFI_OBJECT_TYPE_UNDEFINED = 0,
266 /** @EFI_OBJECT_TYPE_U_BOOT_FIRMWARE: U-Boot firmware */
267 EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
268 /** @EFI_OBJECT_TYPE_LOADED_IMAGE: loaded image (not started) */
269 EFI_OBJECT_TYPE_LOADED_IMAGE,
270 /** @EFI_OBJECT_TYPE_STARTED_IMAGE: started image */
271 EFI_OBJECT_TYPE_STARTED_IMAGE,
275 * struct efi_object - dereferenced EFI handle
277 * @link: pointers to put the handle into a linked list
278 * @protocols: linked list with the protocol interfaces installed on this
280 * @type: image type if the handle relates to an image
282 * UEFI offers a flexible and expandable object model. The objects in the UEFI
283 * API are devices, drivers, and loaded images. struct efi_object is our storage
284 * structure for these objects.
286 * When including this structure into a larger structure always put it first so
287 * that when deleting a handle the whole encompassing structure can be freed.
289 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
290 * has been created for such pointers.
293 /* Every UEFI object is part of a global object list */
294 struct list_head link;
295 /* The list of protocols */
296 struct list_head protocols;
297 enum efi_object_type type;
300 enum efi_image_auth_status {
301 EFI_IMAGE_AUTH_FAILED = 0,
302 EFI_IMAGE_AUTH_PASSED,
306 * struct efi_loaded_image_obj - handle of a loaded image
308 * @header: EFI object header
309 * @exit_status: exit status passed to Exit()
310 * @exit_data_size: exit data size passed to Exit()
311 * @exit_data: exit data passed to Exit()
312 * @exit_jmp: long jump buffer for returning from started image
313 * @entry: entry address of the relocated image
314 * @image_type: indicates if the image is an applicition or a driver
315 * @auth_status: indicates if the image is authenticated
317 struct efi_loaded_image_obj {
318 struct efi_object header;
319 efi_status_t *exit_status;
320 efi_uintn_t *exit_data_size;
322 struct jmp_buf_data *exit_jmp;
323 EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
324 struct efi_system_table *st);
326 enum efi_image_auth_status auth_status;
332 * @link: Link to list of all events
333 * @queue_link: Link to the list of queued events
334 * @type: Type of event, see efi_create_event
335 * @notify_tpl: Task priority level of notifications
336 * @notify_function: Function to call when the event is triggered
337 * @notify_context: Data to be passed to the notify function
338 * @group: Event group
339 * @trigger_time: Period of the timer
340 * @trigger_next: Next time to trigger the timer
341 * @trigger_type: Type of timer, see efi_set_timer
342 * @is_signaled: The event occurred. The event is in the signaled state.
345 struct list_head link;
346 struct list_head queue_link;
348 efi_uintn_t notify_tpl;
349 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
350 void *notify_context;
351 const efi_guid_t *group;
354 enum efi_timer_delay trigger_type;
358 /* This list contains all UEFI objects we know of */
359 extern struct list_head efi_obj_list;
360 /* List of all events */
361 extern struct list_head efi_events;
364 * struct efi_protocol_notification - handle for notified protocol
366 * When a protocol interface is installed for which an event was registered with
367 * the RegisterProtocolNotify() service this structure is used to hold the
368 * handle on which the protocol interface was installed.
370 * @link: link to list of all handles notified for this event
371 * @handle: handle on which the notified protocol interface was installed
373 struct efi_protocol_notification {
374 struct list_head link;
379 * struct efi_register_notify_event - event registered by
380 * RegisterProtocolNotify()
382 * The address of this structure serves as registration value.
384 * @link: link to list of all registered events
385 * @event: registered event. The same event may registered for multiple
387 * @protocol: protocol for which the event is registered
388 * @handles: linked list of all handles on which the notified protocol was
391 struct efi_register_notify_event {
392 struct list_head link;
393 struct efi_event *event;
395 struct list_head handles;
398 /* List of all events registered by RegisterProtocolNotify() */
399 extern struct list_head efi_register_notify_events;
401 /* Initialize efi execution environment */
402 efi_status_t efi_init_obj_list(void);
403 /* Install device tree */
404 efi_status_t efi_install_fdt(void *fdt);
405 /* Run loaded UEFI image */
406 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
407 /* Initialize variable services */
408 efi_status_t efi_init_variables(void);
409 /* Notify ExitBootServices() is called */
410 void efi_variables_boot_exit_notify(void);
411 /* Called by bootefi to initialize root node */
412 efi_status_t efi_root_node_register(void);
413 /* Called by bootefi to initialize runtime */
414 efi_status_t efi_initialize_system_table(void);
415 /* efi_runtime_detach() - detach unimplemented runtime functions */
416 void efi_runtime_detach(void);
417 /* efi_convert_pointer() - convert pointer to virtual address */
418 efi_status_t EFIAPI efi_convert_pointer(efi_uintn_t debug_disposition,
420 /* Carve out DT reserved memory ranges */
421 void efi_carve_out_dt_rsv(void *fdt);
422 /* Called by bootefi to make console interface available */
423 efi_status_t efi_console_register(void);
424 /* Called by bootefi to make all disk storage accessible as EFI objects */
425 efi_status_t efi_disk_register(void);
426 /* Called by efi_init_obj_list() to install EFI_RNG_PROTOCOL */
427 efi_status_t efi_rng_register(void);
428 /* Called by efi_init_obj_list() to install EFI_TCG2_PROTOCOL */
429 efi_status_t efi_tcg2_register(void);
430 /* measure the pe-coff image, extend PCR and add Event Log */
431 efi_status_t tcg2_measure_pe_image(void *efi, u64 efi_size,
432 struct efi_loaded_image_obj *handle,
433 struct efi_loaded_image *loaded_image_info);
434 /* Create handles and protocols for the partitions of a block device */
435 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
436 const char *if_typename, int diskid,
437 const char *pdevname);
438 /* Check if it is EFI system partition */
439 bool efi_disk_is_system_part(efi_handle_t handle);
440 /* Called by bootefi to make GOP (graphical) interface available */
441 efi_status_t efi_gop_register(void);
442 /* Called by bootefi to make the network interface available */
443 efi_status_t efi_net_register(void);
444 /* Called by bootefi to make the watchdog available */
445 efi_status_t efi_watchdog_register(void);
446 efi_status_t efi_initrd_register(void);
447 void efi_initrd_deregister(void);
448 /* Called by bootefi to make SMBIOS tables available */
450 * efi_acpi_register() - write out ACPI tables
452 * Called by bootefi to make ACPI tables available
454 * @return 0 if OK, -ENOMEM if no memory is available for the tables
456 efi_status_t efi_acpi_register(void);
458 * efi_smbios_register() - write out SMBIOS tables
460 * Called by bootefi to make SMBIOS tables available
462 * @return 0 if OK, -ENOMEM if no memory is available for the tables
464 efi_status_t efi_smbios_register(void);
466 struct efi_simple_file_system_protocol *
467 efi_fs_from_path(struct efi_device_path *fp);
469 /* Called by networking code to memorize the dhcp ack package */
470 void efi_net_set_dhcp_ack(void *pkt, int len);
471 /* Called by efi_set_watchdog_timer to reset the timer */
472 efi_status_t efi_set_watchdog(unsigned long timeout);
474 /* Called from places to check whether a timer expired */
475 void efi_timer_check(void);
476 /* Check if a buffer contains a PE-COFF image */
477 efi_status_t efi_check_pe(void *buffer, size_t size, void **nt_header);
478 /* PE loader implementation */
479 efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
480 void *efi, size_t efi_size,
481 struct efi_loaded_image *loaded_image_info);
482 /* Called once to store the pristine gd pointer */
483 void efi_save_gd(void);
484 /* Special case handler for error/abort that just tries to dtrt to get
485 * back to u-boot world */
486 void efi_restore_gd(void);
487 /* Call this to relocate the runtime section to an address space */
488 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
489 /* Call this to set the current device name */
490 void efi_set_bootdev(const char *dev, const char *devnr, const char *path,
491 void *buffer, size_t buffer_size);
492 /* Add a new object to the object list. */
493 void efi_add_handle(efi_handle_t obj);
495 efi_status_t efi_create_handle(efi_handle_t *handle);
497 void efi_delete_handle(efi_handle_t obj);
498 /* Call this to validate a handle and find the EFI object for it */
499 struct efi_object *efi_search_obj(const efi_handle_t handle);
501 efi_status_t EFIAPI efi_load_image(bool boot_policy,
502 efi_handle_t parent_image,
503 struct efi_device_path *file_path,
505 efi_uintn_t source_size,
506 efi_handle_t *image_handle);
508 efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
509 efi_uintn_t *exit_data_size,
512 efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
513 /* Find a protocol on a handle */
514 efi_status_t efi_search_protocol(const efi_handle_t handle,
515 const efi_guid_t *protocol_guid,
516 struct efi_handler **handler);
517 /* Install new protocol on a handle */
518 efi_status_t efi_add_protocol(const efi_handle_t handle,
519 const efi_guid_t *protocol,
520 void *protocol_interface);
522 efi_status_t efi_protocol_open(struct efi_handler *handler,
523 void **protocol_interface, void *agent_handle,
524 void *controller_handle, uint32_t attributes);
526 /* Delete protocol from a handle */
527 efi_status_t efi_remove_protocol(const efi_handle_t handle,
528 const efi_guid_t *protocol,
529 void *protocol_interface);
530 /* Delete all protocols from a handle */
531 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
532 /* Install multiple protocol interfaces */
533 efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
534 (efi_handle_t *handle, ...);
535 /* Get handles that support a given protocol */
536 efi_status_t EFIAPI efi_locate_handle_buffer(
537 enum efi_locate_search_type search_type,
538 const efi_guid_t *protocol, void *search_key,
539 efi_uintn_t *no_handles, efi_handle_t **buffer);
540 /* Close an previously opened protocol interface */
541 efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
542 const efi_guid_t *protocol,
543 efi_handle_t agent_handle,
544 efi_handle_t controller_handle);
545 /* Open a protocol interface */
546 efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
547 const efi_guid_t *protocol,
548 void **protocol_interface);
549 /* Call this to create an event */
550 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
551 void (EFIAPI *notify_function) (
552 struct efi_event *event,
554 void *notify_context, efi_guid_t *group,
555 struct efi_event **event);
556 /* Call this to set a timer */
557 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
558 uint64_t trigger_time);
559 /* Call this to signal an event */
560 void efi_signal_event(struct efi_event *event);
562 /* open file system: */
563 struct efi_simple_file_system_protocol *efi_simple_file_system(
564 struct blk_desc *desc, int part, struct efi_device_path *dp);
566 /* open file from device-path: */
567 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
569 /* Registers a callback function for a notification event. */
570 efi_status_t EFIAPI efi_register_protocol_notify(const efi_guid_t *protocol,
571 struct efi_event *event,
572 void **registration);
573 efi_status_t efi_file_size(struct efi_file_handle *fh, efi_uintn_t *size);
575 /* get a device path from a Boot#### option */
576 struct efi_device_path *efi_get_dp_from_boot(const efi_guid_t guid);
579 * efi_size_in_pages() - convert size in bytes to size in pages
581 * This macro returns the number of EFI memory pages required to hold 'size'
584 * @size: size in bytes
585 * Return: size in pages
587 #define efi_size_in_pages(size) (((size) + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
588 /* Generic EFI memory allocator, call this to get memory */
589 void *efi_alloc(uint64_t len, int memory_type);
590 /* More specific EFI memory allocator, called by EFI payloads */
591 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
593 /* EFI memory free function. */
594 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
595 /* EFI memory allocator for small allocations */
596 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
598 /* EFI pool memory free function. */
599 efi_status_t efi_free_pool(void *buffer);
600 /* Returns the EFI memory map */
601 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
602 struct efi_mem_desc *memory_map,
603 efi_uintn_t *map_key,
604 efi_uintn_t *descriptor_size,
605 uint32_t *descriptor_version);
606 /* Adds a range into the EFI memory map */
607 efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type);
608 /* Adds a conventional range into the EFI memory map */
609 efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
612 /* Called by board init to initialize the EFI drivers */
613 efi_status_t efi_driver_init(void);
614 /* Called by board init to initialize the EFI memory map */
615 int efi_memory_init(void);
616 /* Adds new or overrides configuration table entry to the system table */
617 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
618 /* Sets up a loaded image */
619 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
620 struct efi_device_path *file_path,
621 struct efi_loaded_image_obj **handle_ptr,
622 struct efi_loaded_image **info_ptr);
623 /* Print information about all loaded images */
624 void efi_print_image_infos(void *pc);
626 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
627 extern void *efi_bounce_buffer;
628 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
632 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
633 int efi_dp_match(const struct efi_device_path *a,
634 const struct efi_device_path *b);
635 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
636 struct efi_device_path **rem);
637 /* get size of the first device path instance excluding end node */
638 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
639 /* size of multi-instance device path excluding end node */
640 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
641 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
642 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
643 const struct efi_device_path *dp2);
644 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
645 const struct efi_device_path *node);
646 /* Create a device path node of given type, sub-type, length */
647 struct efi_device_path *efi_dp_create_device_node(const u8 type,
650 /* Append device path instance */
651 struct efi_device_path *efi_dp_append_instance(
652 const struct efi_device_path *dp,
653 const struct efi_device_path *dpi);
654 /* Get next device path instance */
655 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
657 /* Check if a device path contains muliple instances */
658 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
660 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
661 /* Create a device node for a block device partition. */
662 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
663 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
665 struct efi_device_path *efi_dp_from_eth(void);
666 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
667 uint64_t start_address,
668 uint64_t end_address);
669 /* Determine the last device path node that is not the end node. */
670 const struct efi_device_path *efi_dp_last_node(
671 const struct efi_device_path *dp);
672 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
673 struct efi_device_path **device_path,
674 struct efi_device_path **file_path);
675 efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
677 struct efi_device_path **device,
678 struct efi_device_path **file);
679 ssize_t efi_dp_check_length(const struct efi_device_path *dp,
680 const size_t maxlen);
682 #define EFI_DP_TYPE(_dp, _type, _subtype) \
683 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
684 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
687 * __efi_runtime_data - declares a non-const variable for EFI runtime section
689 * This macro indicates that a variable is non-const and should go into the
690 * EFI runtime section, and thus still be available when the OS is running.
692 * Only use on variables not declared const.
698 * static __efi_runtime_data my_computed_table[256];
700 #define __efi_runtime_data __section(".data.efi_runtime")
703 * __efi_runtime_rodata - declares a read-only variable for EFI runtime section
705 * This macro indicates that a variable is read-only (const) and should go into
706 * the EFI runtime section, and thus still be available when the OS is running.
708 * Only use on variables also declared const.
714 * static const __efi_runtime_rodata my_const_table[] = { 1, 2, 3 };
716 #define __efi_runtime_rodata __section(".rodata.efi_runtime")
719 * __efi_runtime - declares a function for EFI runtime section
721 * This macro indicates that a function should go into the EFI runtime section,
722 * and thus still be available when the OS is running.
728 * static __efi_runtime compute_my_table(void);
730 #define __efi_runtime __section(".text.efi_runtime")
732 /* Indicate supported runtime services */
733 efi_status_t efi_init_runtime_supported(void);
735 /* Update CRC32 in table header */
736 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
738 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
739 * to make it available at runtime */
740 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
742 /* Boards may provide the functions below to implement RTS functionality */
744 void __efi_runtime EFIAPI efi_reset_system(
745 enum efi_reset_type reset_type,
746 efi_status_t reset_status,
747 unsigned long data_size, void *reset_data);
749 /* Architecture specific initialization of the EFI subsystem */
750 efi_status_t efi_reset_system_init(void);
752 efi_status_t __efi_runtime EFIAPI efi_get_time(
753 struct efi_time *time,
754 struct efi_time_cap *capabilities);
756 efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
758 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
760 * Entry point for the tests of the EFI API.
761 * It is called by 'bootefi selftest'
763 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
764 struct efi_system_table *systab);
767 efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
768 const efi_guid_t *vendor, u32 *attributes,
769 efi_uintn_t *data_size, void *data);
770 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
773 efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
774 const efi_guid_t *vendor, u32 attributes,
775 efi_uintn_t data_size, const void *data);
777 efi_status_t EFIAPI efi_query_variable_info(
778 u32 attributes, u64 *maximum_variable_storage_size,
779 u64 *remaining_variable_storage_size,
780 u64 *maximum_variable_size);
782 void *efi_get_var(u16 *name, const efi_guid_t *vendor, efi_uintn_t *size);
785 * See section 3.1.3 in the v2.7 UEFI spec for more details on
786 * the layout of EFI_LOAD_OPTION. In short it is:
788 * typedef struct _EFI_LOAD_OPTION {
790 * UINT16 FilePathListLength;
791 * // CHAR16 Description[]; <-- variable length, NULL terminated
792 * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
793 * <-- FilePathListLength bytes
794 * // UINT8 OptionalData[];
797 struct efi_load_option {
799 u16 file_path_length;
801 struct efi_device_path *file_path;
802 const u8 *optional_data;
805 struct efi_device_path *efi_dp_from_lo(struct efi_load_option *lo,
806 efi_uintn_t *size, efi_guid_t guid);
807 struct efi_device_path *efi_dp_concat(const struct efi_device_path *dp1,
808 const struct efi_device_path *dp2);
809 efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
811 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
812 efi_status_t efi_set_load_options(efi_handle_t handle,
813 efi_uintn_t load_options_size,
815 efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options);
818 * struct efi_image_regions - A list of memory regions
820 * @max: Maximum number of regions
821 * @num: Number of regions
822 * @reg: array of regions
824 struct efi_image_regions {
827 struct image_region reg[];
831 * struct efi_sig_data - A decoded data of struct efi_signature_data
833 * This structure represents an internal form of signature in
834 * signature database. A listed list may represent a signature list.
836 * @next: Pointer to next entry
837 * @owner: Signature owner
838 * @data: Pointer to signature data
839 * @size: Size of signature data
841 struct efi_sig_data {
842 struct efi_sig_data *next;
849 * struct efi_signature_store - A decoded data of signature database
851 * This structure represents an internal form of signature database.
853 * @next: Pointer to next entry
854 * @sig_type: Signature type
855 * @sig_data_list: Pointer to signature list
857 struct efi_signature_store {
858 struct efi_signature_store *next;
860 struct efi_sig_data *sig_data_list;
863 struct x509_certificate;
864 struct pkcs7_message;
866 bool efi_signature_lookup_digest(struct efi_image_regions *regs,
867 struct efi_signature_store *db);
868 bool efi_signature_verify(struct efi_image_regions *regs,
869 struct pkcs7_message *msg,
870 struct efi_signature_store *db,
871 struct efi_signature_store *dbx);
872 static inline bool efi_signature_verify_one(struct efi_image_regions *regs,
873 struct pkcs7_message *msg,
874 struct efi_signature_store *db)
876 return efi_signature_verify(regs, msg, db, NULL);
878 bool efi_signature_check_signers(struct pkcs7_message *msg,
879 struct efi_signature_store *dbx);
881 efi_status_t efi_image_region_add(struct efi_image_regions *regs,
882 const void *start, const void *end,
885 void efi_sigstore_free(struct efi_signature_store *sigstore);
886 struct efi_signature_store *efi_build_signature_store(void *sig_list,
888 struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
890 bool efi_secure_boot_enabled(void);
892 bool efi_capsule_auth_enabled(void);
894 void *efi_prepare_aligned_image(void *efi, u64 *efi_size);
896 bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
897 WIN_CERTIFICATE **auth, size_t *auth_len);
899 struct pkcs7_message *efi_parse_pkcs7_header(const void *buf,
903 /* runtime implementation of memcpy() */
904 void efi_memcpy_runtime(void *dest, const void *src, size_t n);
906 /* commonly used helper function */
907 u16 *efi_create_indexed_name(u16 *buffer, size_t buffer_size, const char *name,
910 extern const struct efi_firmware_management_protocol efi_fmp_fit;
911 extern const struct efi_firmware_management_protocol efi_fmp_raw;
914 efi_status_t EFIAPI efi_update_capsule(
915 struct efi_capsule_header **capsule_header_array,
916 efi_uintn_t capsule_count,
917 u64 scatter_gather_list);
918 efi_status_t EFIAPI efi_query_capsule_caps(
919 struct efi_capsule_header **capsule_header_array,
920 efi_uintn_t capsule_count,
921 u64 *maximum_capsule_size,
924 efi_status_t efi_capsule_authenticate(const void *capsule,
925 efi_uintn_t capsule_size,
926 void **image, efi_uintn_t *image_size);
928 #define EFI_CAPSULE_DIR L"\\EFI\\UpdateCapsule\\"
930 /* Hook at initialization */
931 efi_status_t efi_launch_capsules(void);
933 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
935 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
936 #define __efi_runtime_data
937 #define __efi_runtime_rodata
938 #define __efi_runtime
939 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
944 /* No loader configured, stub out EFI_ENTRY */
945 static inline void efi_restore_gd(void) { }
946 static inline void efi_set_bootdev(const char *dev, const char *devnr,
947 const char *path, void *buffer,
948 size_t buffer_size) { }
949 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
950 static inline void efi_print_image_infos(void *pc) { }
951 static inline efi_status_t efi_launch_capsules(void)
956 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
959 * Install the ESRT system table.
961 * @return status code
963 efi_status_t efi_esrt_register(void);
966 * efi_esrt_populate() - Populates the ESRT entries from the FMP instances
967 * present in the system.
968 * If an ESRT already exists, the old ESRT is replaced in the system table.
969 * The memory of the old ESRT is deallocated.
972 * - EFI_SUCCESS if the ESRT is correctly created
973 * - error code otherwise.
975 efi_status_t efi_esrt_populate(void);
976 efi_status_t efi_load_capsule_drivers(void);
977 #endif /* _EFI_LOADER_H */