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 /* EFI system partition */
63 extern struct efi_system_partition {
67 } efi_system_partition;
69 int __efi_entry_check(void);
70 int __efi_exit_check(void);
71 const char *__efi_nesting(void);
72 const char *__efi_nesting_inc(void);
73 const char *__efi_nesting_dec(void);
76 * Enter the u-boot world from UEFI:
78 #define EFI_ENTRY(format, ...) do { \
79 assert(__efi_entry_check()); \
80 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
81 __func__, ##__VA_ARGS__); \
85 * Exit the u-boot world back to UEFI:
87 #define EFI_EXIT(ret) ({ \
88 typeof(ret) _r = ret; \
89 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
90 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
91 assert(__efi_exit_check()); \
96 * Call non-void UEFI function from u-boot and retrieve return value:
98 #define EFI_CALL(exp) ({ \
99 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
100 assert(__efi_exit_check()); \
101 typeof(exp) _r = exp; \
102 assert(__efi_entry_check()); \
103 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
104 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
109 * Call void UEFI function from u-boot:
111 #define EFI_CALL_VOID(exp) do { \
112 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
113 assert(__efi_exit_check()); \
115 assert(__efi_entry_check()); \
116 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
120 * Write an indented message with EFI prefix
122 #define EFI_PRINT(format, ...) ({ \
123 debug("%sEFI: " format, __efi_nesting(), \
127 #ifdef CONFIG_SYS_CACHELINE_SIZE
128 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
130 /* Just use the greatest cache flush alignment requirement I'm aware of */
131 #define EFI_CACHELINE_SIZE 128
134 /* Key identifying current memory map */
135 extern efi_uintn_t efi_memory_map_key;
137 extern struct efi_runtime_services efi_runtime_services;
138 extern struct efi_system_table systab;
140 extern struct efi_simple_text_output_protocol efi_con_out;
141 extern struct efi_simple_text_input_protocol efi_con_in;
142 extern struct efi_console_control_protocol efi_console_control;
143 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
144 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
145 extern const struct efi_device_path_utilities_protocol
146 efi_device_path_utilities;
147 /* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */
148 extern const struct efi_unicode_collation_protocol
149 efi_unicode_collation_protocol;
150 /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
151 extern const struct efi_unicode_collation_protocol
152 efi_unicode_collation_protocol2;
153 extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
154 extern const struct efi_hii_config_access_protocol efi_hii_config_access;
155 extern const struct efi_hii_database_protocol efi_hii_database;
156 extern const struct efi_hii_string_protocol efi_hii_string;
158 uint16_t *efi_dp_str(struct efi_device_path *dp);
160 /* GUID of the U-Boot root node */
161 extern const efi_guid_t efi_u_boot_guid;
162 #ifdef CONFIG_SANDBOX
163 /* GUID of U-Boot host device on sandbox */
164 extern const efi_guid_t efi_guid_host_dev;
166 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
167 extern const efi_guid_t efi_block_io_guid;
168 extern const efi_guid_t efi_global_variable_guid;
169 extern const efi_guid_t efi_guid_console_control;
170 extern const efi_guid_t efi_guid_device_path;
171 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
172 extern const efi_guid_t efi_guid_driver_binding_protocol;
173 /* event group ExitBootServices() invoked */
174 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
175 /* event group SetVirtualAddressMap() invoked */
176 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
177 /* event group memory map changed */
178 extern const efi_guid_t efi_guid_event_group_memory_map_change;
179 /* event group boot manager about to boot */
180 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
181 /* event group ResetSystem() invoked (before ExitBootServices) */
182 extern const efi_guid_t efi_guid_event_group_reset_system;
183 /* GUID of the device tree table */
184 extern const efi_guid_t efi_guid_fdt;
185 extern const efi_guid_t efi_guid_loaded_image;
186 extern const efi_guid_t efi_guid_loaded_image_device_path;
187 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
188 extern const efi_guid_t efi_simple_file_system_protocol_guid;
189 extern const efi_guid_t efi_file_info_guid;
190 /* GUID for file system information */
191 extern const efi_guid_t efi_file_system_info_guid;
192 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
193 /* GUID of the deprecated Unicode collation protocol */
194 extern const efi_guid_t efi_guid_unicode_collation_protocol;
195 /* GUID of the Unicode collation protocol */
196 extern const efi_guid_t efi_guid_unicode_collation_protocol2;
197 extern const efi_guid_t efi_guid_hii_config_routing_protocol;
198 extern const efi_guid_t efi_guid_hii_config_access_protocol;
199 extern const efi_guid_t efi_guid_hii_database_protocol;
200 extern const efi_guid_t efi_guid_hii_string_protocol;
201 /* GUIDs for authentication */
202 extern const efi_guid_t efi_guid_image_security_database;
203 extern const efi_guid_t efi_guid_sha256;
204 extern const efi_guid_t efi_guid_cert_x509;
205 extern const efi_guid_t efi_guid_cert_x509_sha256;
206 extern const efi_guid_t efi_guid_cert_type_pkcs7;
208 /* GUID of RNG protocol */
209 extern const efi_guid_t efi_guid_rng_protocol;
211 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
212 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
215 * struct efi_open_protocol_info_item - open protocol info item
217 * When a protocol is opened a open protocol info entry is created.
218 * These are maintained in a list.
220 * @link: link to the list of open protocol info entries of a protocol
221 * @info: information about the opening of a protocol
223 struct efi_open_protocol_info_item {
224 struct list_head link;
225 struct efi_open_protocol_info_entry info;
229 * struct efi_handler - single protocol interface of a handle
231 * When the UEFI payload wants to open a protocol on an object to get its
232 * interface (usually a struct with callback functions), this struct maps the
233 * protocol GUID to the respective protocol interface
235 * @link: link to the list of protocols of a handle
236 * @guid: GUID of the protocol
237 * @protocol_interface: protocol interface
238 * @open_infos link to the list of open protocol info items
241 struct list_head link;
242 const efi_guid_t *guid;
243 void *protocol_interface;
244 struct list_head open_infos;
248 * enum efi_object_type - type of EFI object
250 * In UnloadImage we must be able to identify if the handle relates to a
253 enum efi_object_type {
254 EFI_OBJECT_TYPE_UNDEFINED = 0,
255 EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
256 EFI_OBJECT_TYPE_LOADED_IMAGE,
257 EFI_OBJECT_TYPE_STARTED_IMAGE,
261 * struct efi_object - dereferenced EFI handle
263 * @link: pointers to put the handle into a linked list
264 * @protocols: linked list with the protocol interfaces installed on this
267 * UEFI offers a flexible and expandable object model. The objects in the UEFI
268 * API are devices, drivers, and loaded images. struct efi_object is our storage
269 * structure for these objects.
271 * When including this structure into a larger structure always put it first so
272 * that when deleting a handle the whole encompassing structure can be freed.
274 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
275 * has been created for such pointers.
278 /* Every UEFI object is part of a global object list */
279 struct list_head link;
280 /* The list of protocols */
281 struct list_head protocols;
282 enum efi_object_type type;
285 enum efi_image_auth_status {
286 EFI_IMAGE_AUTH_FAILED = 0,
287 EFI_IMAGE_AUTH_PASSED,
291 * struct efi_loaded_image_obj - handle of a loaded image
293 * @header: EFI object header
294 * @exit_status: exit status passed to Exit()
295 * @exit_data_size: exit data size passed to Exit()
296 * @exit_data: exit data passed to Exit()
297 * @exit_jmp: long jump buffer for returning form started image
298 * @entry: entry address of the relocated image
300 struct efi_loaded_image_obj {
301 struct efi_object header;
302 efi_status_t exit_status;
303 efi_uintn_t *exit_data_size;
305 struct jmp_buf_data exit_jmp;
306 EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
307 struct efi_system_table *st);
309 enum efi_image_auth_status auth_status;
315 * @link: Link to list of all events
316 * @queue_link: Link to the list of queued events
317 * @type: Type of event, see efi_create_event
318 * @notify_tpl: Task priority level of notifications
319 * @nofify_function: Function to call when the event is triggered
320 * @notify_context: Data to be passed to the notify function
321 * @group: Event group
322 * @trigger_time: Period of the timer
323 * @trigger_next: Next time to trigger the timer
324 * @trigger_type: Type of timer, see efi_set_timer
325 * @is_signaled: The event occurred. The event is in the signaled state.
328 struct list_head link;
329 struct list_head queue_link;
331 efi_uintn_t notify_tpl;
332 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
333 void *notify_context;
334 const efi_guid_t *group;
337 enum efi_timer_delay trigger_type;
341 /* This list contains all UEFI objects we know of */
342 extern struct list_head efi_obj_list;
343 /* List of all events */
344 extern struct list_head efi_events;
347 * struct efi_protocol_notification - handle for notified protocol
349 * When a protocol interface is installed for which an event was registered with
350 * the RegisterProtocolNotify() service this structure is used to hold the
351 * handle on which the protocol interface was installed.
353 * @link: link to list of all handles notified for this event
354 * @handle: handle on which the notified protocol interface was installed
356 struct efi_protocol_notification {
357 struct list_head link;
362 * efi_register_notify_event - event registered by RegisterProtocolNotify()
364 * The address of this structure serves as registration value.
366 * @link: link to list of all registered events
367 * @event: registered event. The same event may registered for multiple
369 * @protocol: protocol for which the event is registered
370 * @handles: linked list of all handles on which the notified protocol was
373 struct efi_register_notify_event {
374 struct list_head link;
375 struct efi_event *event;
377 struct list_head handles;
380 /* List of all events registered by RegisterProtocolNotify() */
381 extern struct list_head efi_register_notify_events;
383 /* Initialize efi execution environment */
384 efi_status_t efi_init_obj_list(void);
385 /* Install device tree */
386 efi_status_t efi_install_fdt(void *fdt);
387 /* Run loaded UEFI image */
388 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
389 /* Initialize variable services */
390 efi_status_t efi_init_variables(void);
391 /* Notify ExitBootServices() is called */
392 void efi_variables_boot_exit_notify(void);
393 /* Called by bootefi to initialize root node */
394 efi_status_t efi_root_node_register(void);
395 /* Called by bootefi to initialize runtime */
396 efi_status_t efi_initialize_system_table(void);
397 /* efi_runtime_detach() - detach unimplemented runtime functions */
398 void efi_runtime_detach(void);
399 /* efi_convert_pointer() - convert pointer to virtual address */
400 efi_status_t EFIAPI efi_convert_pointer(efi_uintn_t debug_disposition,
402 /* Called by bootefi to make console interface available */
403 efi_status_t efi_console_register(void);
404 /* Called by bootefi to make all disk storage accessible as EFI objects */
405 efi_status_t efi_disk_register(void);
406 /* Called by efi_init_obj_list() to install EFI_RNG_PROTOCOL */
407 efi_status_t efi_rng_register(void);
408 /* Create handles and protocols for the partitions of a block device */
409 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
410 const char *if_typename, int diskid,
411 const char *pdevname);
412 /* Check if it is EFI system partition */
413 bool efi_disk_is_system_part(efi_handle_t handle);
414 /* Called by bootefi to make GOP (graphical) interface available */
415 efi_status_t efi_gop_register(void);
416 /* Called by bootefi to make the network interface available */
417 efi_status_t efi_net_register(void);
418 /* Called by bootefi to make the watchdog available */
419 efi_status_t efi_watchdog_register(void);
420 efi_status_t efi_initrd_register(void);
421 /* Called by bootefi to make SMBIOS tables available */
423 * efi_acpi_register() - write out ACPI tables
425 * Called by bootefi to make ACPI tables available
427 * @return 0 if OK, -ENOMEM if no memory is available for the tables
429 efi_status_t efi_acpi_register(void);
431 * efi_smbios_register() - write out SMBIOS tables
433 * Called by bootefi to make SMBIOS tables available
435 * @return 0 if OK, -ENOMEM if no memory is available for the tables
437 efi_status_t efi_smbios_register(void);
439 struct efi_simple_file_system_protocol *
440 efi_fs_from_path(struct efi_device_path *fp);
442 /* Called by networking code to memorize the dhcp ack package */
443 void efi_net_set_dhcp_ack(void *pkt, int len);
444 /* Called by efi_set_watchdog_timer to reset the timer */
445 efi_status_t efi_set_watchdog(unsigned long timeout);
447 /* Called from places to check whether a timer expired */
448 void efi_timer_check(void);
449 /* PE loader implementation */
450 efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
451 void *efi, size_t efi_size,
452 struct efi_loaded_image *loaded_image_info);
453 /* Called once to store the pristine gd pointer */
454 void efi_save_gd(void);
455 /* Special case handler for error/abort that just tries to dtrt to get
456 * back to u-boot world */
457 void efi_restore_gd(void);
458 /* Call this to relocate the runtime section to an address space */
459 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
460 /* Call this to set the current device name */
461 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
462 /* Add a new object to the object list. */
463 void efi_add_handle(efi_handle_t obj);
465 efi_status_t efi_create_handle(efi_handle_t *handle);
467 void efi_delete_handle(efi_handle_t obj);
468 /* Call this to validate a handle and find the EFI object for it */
469 struct efi_object *efi_search_obj(const efi_handle_t handle);
471 efi_status_t EFIAPI efi_load_image(bool boot_policy,
472 efi_handle_t parent_image,
473 struct efi_device_path *file_path,
475 efi_uintn_t source_size,
476 efi_handle_t *image_handle);
478 efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
479 efi_uintn_t *exit_data_size,
482 efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
483 /* Find a protocol on a handle */
484 efi_status_t efi_search_protocol(const efi_handle_t handle,
485 const efi_guid_t *protocol_guid,
486 struct efi_handler **handler);
487 /* Install new protocol on a handle */
488 efi_status_t efi_add_protocol(const efi_handle_t handle,
489 const efi_guid_t *protocol,
490 void *protocol_interface);
491 /* Delete protocol from a handle */
492 efi_status_t efi_remove_protocol(const efi_handle_t handle,
493 const efi_guid_t *protocol,
494 void *protocol_interface);
495 /* Delete all protocols from a handle */
496 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
497 /* Install multiple protocol interfaces */
498 efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
499 (efi_handle_t *handle, ...);
500 /* Get handles that support a given protocol */
501 efi_status_t EFIAPI efi_locate_handle_buffer(
502 enum efi_locate_search_type search_type,
503 const efi_guid_t *protocol, void *search_key,
504 efi_uintn_t *no_handles, efi_handle_t **buffer);
505 /* Close an previously opened protocol interface */
506 efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
507 const efi_guid_t *protocol,
508 efi_handle_t agent_handle,
509 efi_handle_t controller_handle);
510 /* Open a protocol interface */
511 efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
512 const efi_guid_t *protocol,
513 void **protocol_interface);
514 /* Call this to create an event */
515 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
516 void (EFIAPI *notify_function) (
517 struct efi_event *event,
519 void *notify_context, efi_guid_t *group,
520 struct efi_event **event);
521 /* Call this to set a timer */
522 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
523 uint64_t trigger_time);
524 /* Call this to signal an event */
525 void efi_signal_event(struct efi_event *event);
527 /* open file system: */
528 struct efi_simple_file_system_protocol *efi_simple_file_system(
529 struct blk_desc *desc, int part, struct efi_device_path *dp);
531 /* open file from device-path: */
532 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
535 * efi_size_in_pages() - convert size in bytes to size in pages
537 * This macro returns the number of EFI memory pages required to hold 'size'
540 * @size: size in bytes
541 * Return: size in pages
543 #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
544 /* Generic EFI memory allocator, call this to get memory */
545 void *efi_alloc(uint64_t len, int memory_type);
546 /* More specific EFI memory allocator, called by EFI payloads */
547 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
549 /* EFI memory free function. */
550 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
551 /* EFI memory allocator for small allocations */
552 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
554 /* EFI pool memory free function. */
555 efi_status_t efi_free_pool(void *buffer);
556 /* Returns the EFI memory map */
557 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
558 struct efi_mem_desc *memory_map,
559 efi_uintn_t *map_key,
560 efi_uintn_t *descriptor_size,
561 uint32_t *descriptor_version);
562 /* Adds a range into the EFI memory map */
563 efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type);
564 /* Adds a conventional range into the EFI memory map */
565 efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
568 /* Called by board init to initialize the EFI drivers */
569 efi_status_t efi_driver_init(void);
570 /* Called by board init to initialize the EFI memory map */
571 int efi_memory_init(void);
572 /* Adds new or overrides configuration table entry to the system table */
573 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
574 /* Sets up a loaded image */
575 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
576 struct efi_device_path *file_path,
577 struct efi_loaded_image_obj **handle_ptr,
578 struct efi_loaded_image **info_ptr);
579 /* Print information about all loaded images */
580 void efi_print_image_infos(void *pc);
582 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
583 extern void *efi_bounce_buffer;
584 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
588 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
589 int efi_dp_match(const struct efi_device_path *a,
590 const struct efi_device_path *b);
591 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
592 struct efi_device_path **rem);
593 /* get size of the first device path instance excluding end node */
594 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
595 /* size of multi-instance device path excluding end node */
596 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
597 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
598 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
599 const struct efi_device_path *dp2);
600 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
601 const struct efi_device_path *node);
602 /* Create a device path node of given type, sub-type, length */
603 struct efi_device_path *efi_dp_create_device_node(const u8 type,
606 /* Append device path instance */
607 struct efi_device_path *efi_dp_append_instance(
608 const struct efi_device_path *dp,
609 const struct efi_device_path *dpi);
610 /* Get next device path instance */
611 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
613 /* Check if a device path contains muliple instances */
614 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
616 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
617 /* Create a device node for a block device partition. */
618 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
619 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
621 struct efi_device_path *efi_dp_from_eth(void);
622 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
623 uint64_t start_address,
624 uint64_t end_address);
625 /* Determine the last device path node that is not the end node. */
626 const struct efi_device_path *efi_dp_last_node(
627 const struct efi_device_path *dp);
628 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
629 struct efi_device_path **device_path,
630 struct efi_device_path **file_path);
631 efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
633 struct efi_device_path **device,
634 struct efi_device_path **file);
635 ssize_t efi_dp_check_length(const struct efi_device_path *dp,
636 const size_t maxlen);
638 #define EFI_DP_TYPE(_dp, _type, _subtype) \
639 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
640 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
643 * Use these to indicate that your code / data should go into the EFI runtime
644 * section and thus still be available when the OS is running
646 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
647 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
649 /* Indicate supported runtime services */
650 efi_status_t efi_init_runtime_supported(void);
652 /* Update CRC32 in table header */
653 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
655 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
656 * to make it available at runtime */
657 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
659 /* Boards may provide the functions below to implement RTS functionality */
661 void __efi_runtime EFIAPI efi_reset_system(
662 enum efi_reset_type reset_type,
663 efi_status_t reset_status,
664 unsigned long data_size, void *reset_data);
666 /* Architecture specific initialization of the EFI subsystem */
667 efi_status_t efi_reset_system_init(void);
669 efi_status_t __efi_runtime EFIAPI efi_get_time(
670 struct efi_time *time,
671 struct efi_time_cap *capabilities);
673 efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
675 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
677 * Entry point for the tests of the EFI API.
678 * It is called by 'bootefi selftest'
680 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
681 struct efi_system_table *systab);
684 efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
685 const efi_guid_t *vendor, u32 *attributes,
686 efi_uintn_t *data_size, void *data);
687 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
690 efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
691 const efi_guid_t *vendor, u32 attributes,
692 efi_uintn_t data_size, const void *data);
694 efi_status_t EFIAPI efi_query_variable_info(
695 u32 attributes, u64 *maximum_variable_storage_size,
696 u64 *remaining_variable_storage_size,
697 u64 *maximum_variable_size);
700 * See section 3.1.3 in the v2.7 UEFI spec for more details on
701 * the layout of EFI_LOAD_OPTION. In short it is:
703 * typedef struct _EFI_LOAD_OPTION {
705 * UINT16 FilePathListLength;
706 * // CHAR16 Description[]; <-- variable length, NULL terminated
707 * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
708 * <-- FilePathListLength bytes
709 * // UINT8 OptionalData[];
712 struct efi_load_option {
714 u16 file_path_length;
716 struct efi_device_path *file_path;
717 const u8 *optional_data;
720 efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
722 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
723 efi_status_t efi_set_load_options(efi_handle_t handle,
724 efi_uintn_t load_options_size,
726 efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options);
729 * efi_image_regions - A list of memory regions
731 * @max: Maximum number of regions
732 * @num: Number of regions
733 * @reg: array of regions
735 struct efi_image_regions {
738 struct image_region reg[];
742 * efi_sig_data - A decoded data of struct efi_signature_data
744 * This structure represents an internal form of signature in
745 * signature database. A listed list may represent a signature list.
747 * @next: Pointer to next entry
748 * @onwer: Signature owner
749 * @data: Pointer to signature data
750 * @size: Size of signature data
752 struct efi_sig_data {
753 struct efi_sig_data *next;
760 * efi_signature_store - A decoded data of signature database
762 * This structure represents an internal form of signature database.
764 * @next: Pointer to next entry
765 * @sig_type: Signature type
766 * @sig_data_list: Pointer to signature list
768 struct efi_signature_store {
769 struct efi_signature_store *next;
771 struct efi_sig_data *sig_data_list;
774 struct x509_certificate;
775 struct pkcs7_message;
777 bool efi_signature_lookup_digest(struct efi_image_regions *regs,
778 struct efi_signature_store *db);
779 bool efi_signature_verify(struct efi_image_regions *regs,
780 struct pkcs7_message *msg,
781 struct efi_signature_store *db,
782 struct efi_signature_store *dbx);
783 static inline bool efi_signature_verify_one(struct efi_image_regions *regs,
784 struct pkcs7_message *msg,
785 struct efi_signature_store *db)
787 return efi_signature_verify(regs, msg, db, NULL);
789 bool efi_signature_check_signers(struct pkcs7_message *msg,
790 struct efi_signature_store *dbx);
792 efi_status_t efi_image_region_add(struct efi_image_regions *regs,
793 const void *start, const void *end,
796 void efi_sigstore_free(struct efi_signature_store *sigstore);
797 struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
799 bool efi_secure_boot_enabled(void);
801 bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
802 WIN_CERTIFICATE **auth, size_t *auth_len);
804 /* runtime implementation of memcpy() */
805 void efi_memcpy_runtime(void *dest, const void *src, size_t n);
807 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
809 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
810 #define __efi_runtime_data
811 #define __efi_runtime
812 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
817 /* No loader configured, stub out EFI_ENTRY */
818 static inline void efi_restore_gd(void) { }
819 static inline void efi_set_bootdev(const char *dev, const char *devnr,
820 const char *path) { }
821 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
822 static inline void efi_print_image_infos(void *pc) { }
824 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
826 #endif /* _EFI_LOADER_H */