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;
157 extern const struct efi_rng_protocol efi_rng_protocol;
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 /* GUID of the Unicode collation protocol */
197 extern const efi_guid_t efi_guid_unicode_collation_protocol2;
198 extern const efi_guid_t efi_guid_hii_config_routing_protocol;
199 extern const efi_guid_t efi_guid_hii_config_access_protocol;
200 extern const efi_guid_t efi_guid_hii_database_protocol;
201 extern const efi_guid_t efi_guid_hii_string_protocol;
202 /* GUIDs for authentication */
203 extern const efi_guid_t efi_guid_image_security_database;
204 extern const efi_guid_t efi_guid_sha256;
205 extern const efi_guid_t efi_guid_cert_x509;
206 extern const efi_guid_t efi_guid_cert_x509_sha256;
207 extern const efi_guid_t efi_guid_cert_type_pkcs7;
209 /* GUID of RNG protocol */
210 extern const efi_guid_t efi_guid_rng_protocol;
212 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
213 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
216 * struct efi_open_protocol_info_item - open protocol info item
218 * When a protocol is opened a open protocol info entry is created.
219 * These are maintained in a list.
221 * @link: link to the list of open protocol info entries of a protocol
222 * @info: information about the opening of a protocol
224 struct efi_open_protocol_info_item {
225 struct list_head link;
226 struct efi_open_protocol_info_entry info;
230 * struct efi_handler - single protocol interface of a handle
232 * When the UEFI payload wants to open a protocol on an object to get its
233 * interface (usually a struct with callback functions), this struct maps the
234 * protocol GUID to the respective protocol interface
236 * @link: link to the list of protocols of a handle
237 * @guid: GUID of the protocol
238 * @protocol_interface: protocol interface
239 * @open_infos link to the list of open protocol info items
242 struct list_head link;
243 const efi_guid_t *guid;
244 void *protocol_interface;
245 struct list_head open_infos;
249 * enum efi_object_type - type of EFI object
251 * In UnloadImage we must be able to identify if the handle relates to a
254 enum efi_object_type {
255 EFI_OBJECT_TYPE_UNDEFINED = 0,
256 EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
257 EFI_OBJECT_TYPE_LOADED_IMAGE,
258 EFI_OBJECT_TYPE_STARTED_IMAGE,
262 * struct efi_object - dereferenced EFI handle
264 * @link: pointers to put the handle into a linked list
265 * @protocols: linked list with the protocol interfaces installed on this
268 * UEFI offers a flexible and expandable object model. The objects in the UEFI
269 * API are devices, drivers, and loaded images. struct efi_object is our storage
270 * structure for these objects.
272 * When including this structure into a larger structure always put it first so
273 * that when deleting a handle the whole encompassing structure can be freed.
275 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
276 * has been created for such pointers.
279 /* Every UEFI object is part of a global object list */
280 struct list_head link;
281 /* The list of protocols */
282 struct list_head protocols;
283 enum efi_object_type type;
286 enum efi_image_auth_status {
287 EFI_IMAGE_AUTH_FAILED = 0,
288 EFI_IMAGE_AUTH_PASSED,
292 * struct efi_loaded_image_obj - handle of a loaded image
294 * @header: EFI object header
295 * @exit_status: exit status passed to Exit()
296 * @exit_data_size: exit data size passed to Exit()
297 * @exit_data: exit data passed to Exit()
298 * @exit_jmp: long jump buffer for returning form started image
299 * @entry: entry address of the relocated image
301 struct efi_loaded_image_obj {
302 struct efi_object header;
303 efi_status_t exit_status;
304 efi_uintn_t *exit_data_size;
306 struct jmp_buf_data exit_jmp;
307 EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
308 struct efi_system_table *st);
310 enum efi_image_auth_status auth_status;
316 * @link: Link to list of all events
317 * @queue_link: Link to the list of queued events
318 * @type: Type of event, see efi_create_event
319 * @notify_tpl: Task priority level of notifications
320 * @nofify_function: Function to call when the event is triggered
321 * @notify_context: Data to be passed to the notify function
322 * @group: Event group
323 * @trigger_time: Period of the timer
324 * @trigger_next: Next time to trigger the timer
325 * @trigger_type: Type of timer, see efi_set_timer
326 * @is_signaled: The event occurred. The event is in the signaled state.
329 struct list_head link;
330 struct list_head queue_link;
332 efi_uintn_t notify_tpl;
333 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
334 void *notify_context;
335 const efi_guid_t *group;
338 enum efi_timer_delay trigger_type;
342 /* This list contains all UEFI objects we know of */
343 extern struct list_head efi_obj_list;
344 /* List of all events */
345 extern struct list_head efi_events;
348 * struct efi_protocol_notification - handle for notified protocol
350 * When a protocol interface is installed for which an event was registered with
351 * the RegisterProtocolNotify() service this structure is used to hold the
352 * handle on which the protocol interface was installed.
354 * @link: link to list of all handles notified for this event
355 * @handle: handle on which the notified protocol interface was installed
357 struct efi_protocol_notification {
358 struct list_head link;
363 * efi_register_notify_event - event registered by RegisterProtocolNotify()
365 * The address of this structure serves as registration value.
367 * @link: link to list of all registered events
368 * @event: registered event. The same event may registered for multiple
370 * @protocol: protocol for which the event is registered
371 * @handles: linked list of all handles on which the notified protocol was
374 struct efi_register_notify_event {
375 struct list_head link;
376 struct efi_event *event;
378 struct list_head handles;
381 /* List of all events registered by RegisterProtocolNotify() */
382 extern struct list_head efi_register_notify_events;
384 /* Initialize efi execution environment */
385 efi_status_t efi_init_obj_list(void);
386 /* Install device tree */
387 efi_status_t efi_install_fdt(void *fdt);
388 /* Run loaded UEFI image */
389 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
390 /* Initialize variable services */
391 efi_status_t efi_init_variables(void);
392 /* Notify ExitBootServices() is called */
393 void efi_variables_boot_exit_notify(void);
394 /* Called by bootefi to initialize root node */
395 efi_status_t efi_root_node_register(void);
396 /* Called by bootefi to initialize runtime */
397 efi_status_t efi_initialize_system_table(void);
398 /* efi_runtime_detach() - detach unimplemented runtime functions */
399 void efi_runtime_detach(void);
400 /* efi_convert_pointer() - convert pointer to virtual address */
401 efi_status_t EFIAPI efi_convert_pointer(efi_uintn_t debug_disposition,
403 /* Called by bootefi to make console interface available */
404 efi_status_t efi_console_register(void);
405 /* Called by bootefi to make all disk storage accessible as EFI objects */
406 efi_status_t efi_disk_register(void);
407 /* Create handles and protocols for the partitions of a block device */
408 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
409 const char *if_typename, int diskid,
410 const char *pdevname);
411 /* Check if it is EFI system partition */
412 bool efi_disk_is_system_part(efi_handle_t handle);
413 /* Called by bootefi to make GOP (graphical) interface available */
414 efi_status_t efi_gop_register(void);
415 /* Called by bootefi to make the network interface available */
416 efi_status_t efi_net_register(void);
417 /* Called by bootefi to make the watchdog available */
418 efi_status_t efi_watchdog_register(void);
419 efi_status_t efi_initrd_register(void);
420 /* Called by bootefi to make SMBIOS tables available */
422 * efi_acpi_register() - write out ACPI tables
424 * Called by bootefi to make ACPI tables available
426 * @return 0 if OK, -ENOMEM if no memory is available for the tables
428 efi_status_t efi_acpi_register(void);
430 * efi_smbios_register() - write out SMBIOS tables
432 * Called by bootefi to make SMBIOS tables available
434 * @return 0 if OK, -ENOMEM if no memory is available for the tables
436 efi_status_t efi_smbios_register(void);
438 struct efi_simple_file_system_protocol *
439 efi_fs_from_path(struct efi_device_path *fp);
441 /* Called by networking code to memorize the dhcp ack package */
442 void efi_net_set_dhcp_ack(void *pkt, int len);
443 /* Called by efi_set_watchdog_timer to reset the timer */
444 efi_status_t efi_set_watchdog(unsigned long timeout);
446 /* Called from places to check whether a timer expired */
447 void efi_timer_check(void);
448 /* PE loader implementation */
449 efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
450 void *efi, size_t efi_size,
451 struct efi_loaded_image *loaded_image_info);
452 /* Called once to store the pristine gd pointer */
453 void efi_save_gd(void);
454 /* Special case handler for error/abort that just tries to dtrt to get
455 * back to u-boot world */
456 void efi_restore_gd(void);
457 /* Call this to relocate the runtime section to an address space */
458 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
459 /* Call this to set the current device name */
460 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
461 /* Add a new object to the object list. */
462 void efi_add_handle(efi_handle_t obj);
464 efi_status_t efi_create_handle(efi_handle_t *handle);
466 void efi_delete_handle(efi_handle_t obj);
467 /* Call this to validate a handle and find the EFI object for it */
468 struct efi_object *efi_search_obj(const efi_handle_t handle);
470 efi_status_t EFIAPI efi_load_image(bool boot_policy,
471 efi_handle_t parent_image,
472 struct efi_device_path *file_path,
474 efi_uintn_t source_size,
475 efi_handle_t *image_handle);
477 efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
478 efi_uintn_t *exit_data_size,
481 efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
482 /* Find a protocol on a handle */
483 efi_status_t efi_search_protocol(const efi_handle_t handle,
484 const efi_guid_t *protocol_guid,
485 struct efi_handler **handler);
486 /* Install new protocol on a handle */
487 efi_status_t efi_add_protocol(const efi_handle_t handle,
488 const efi_guid_t *protocol,
489 void *protocol_interface);
490 /* Delete protocol from a handle */
491 efi_status_t efi_remove_protocol(const efi_handle_t handle,
492 const efi_guid_t *protocol,
493 void *protocol_interface);
494 /* Delete all protocols from a handle */
495 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
496 /* Install multiple protocol interfaces */
497 efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
498 (efi_handle_t *handle, ...);
499 /* Get handles that support a given protocol */
500 efi_status_t EFIAPI efi_locate_handle_buffer(
501 enum efi_locate_search_type search_type,
502 const efi_guid_t *protocol, void *search_key,
503 efi_uintn_t *no_handles, efi_handle_t **buffer);
504 /* Close an previously opened protocol interface */
505 efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
506 const efi_guid_t *protocol,
507 efi_handle_t agent_handle,
508 efi_handle_t controller_handle);
509 /* Open a protocol interface */
510 efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
511 const efi_guid_t *protocol,
512 void **protocol_interface);
513 /* Call this to create an event */
514 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
515 void (EFIAPI *notify_function) (
516 struct efi_event *event,
518 void *notify_context, efi_guid_t *group,
519 struct efi_event **event);
520 /* Call this to set a timer */
521 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
522 uint64_t trigger_time);
523 /* Call this to signal an event */
524 void efi_signal_event(struct efi_event *event);
526 /* open file system: */
527 struct efi_simple_file_system_protocol *efi_simple_file_system(
528 struct blk_desc *desc, int part, struct efi_device_path *dp);
530 /* open file from device-path: */
531 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
534 * efi_size_in_pages() - convert size in bytes to size in pages
536 * This macro returns the number of EFI memory pages required to hold 'size'
539 * @size: size in bytes
540 * Return: size in pages
542 #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
543 /* Generic EFI memory allocator, call this to get memory */
544 void *efi_alloc(uint64_t len, int memory_type);
545 /* More specific EFI memory allocator, called by EFI payloads */
546 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
548 /* EFI memory free function. */
549 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
550 /* EFI memory allocator for small allocations */
551 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
553 /* EFI pool memory free function. */
554 efi_status_t efi_free_pool(void *buffer);
555 /* Returns the EFI memory map */
556 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
557 struct efi_mem_desc *memory_map,
558 efi_uintn_t *map_key,
559 efi_uintn_t *descriptor_size,
560 uint32_t *descriptor_version);
561 /* Adds a range into the EFI memory map */
562 efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type);
563 /* Adds a conventional range into the EFI memory map */
564 efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
567 /* Called by board init to initialize the EFI drivers */
568 efi_status_t efi_driver_init(void);
569 /* Called by board init to initialize the EFI memory map */
570 int efi_memory_init(void);
571 /* Adds new or overrides configuration table entry to the system table */
572 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
573 /* Sets up a loaded image */
574 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
575 struct efi_device_path *file_path,
576 struct efi_loaded_image_obj **handle_ptr,
577 struct efi_loaded_image **info_ptr);
578 /* Print information about all loaded images */
579 void efi_print_image_infos(void *pc);
581 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
582 extern void *efi_bounce_buffer;
583 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
587 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
588 int efi_dp_match(const struct efi_device_path *a,
589 const struct efi_device_path *b);
590 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
591 struct efi_device_path **rem);
592 /* get size of the first device path instance excluding end node */
593 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
594 /* size of multi-instance device path excluding end node */
595 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
596 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
597 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
598 const struct efi_device_path *dp2);
599 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
600 const struct efi_device_path *node);
601 /* Create a device path node of given type, sub-type, length */
602 struct efi_device_path *efi_dp_create_device_node(const u8 type,
605 /* Append device path instance */
606 struct efi_device_path *efi_dp_append_instance(
607 const struct efi_device_path *dp,
608 const struct efi_device_path *dpi);
609 /* Get next device path instance */
610 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
612 /* Check if a device path contains muliple instances */
613 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
615 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
616 /* Create a device node for a block device partition. */
617 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
618 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
620 struct efi_device_path *efi_dp_from_eth(void);
621 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
622 uint64_t start_address,
623 uint64_t end_address);
624 /* Determine the last device path node that is not the end node. */
625 const struct efi_device_path *efi_dp_last_node(
626 const struct efi_device_path *dp);
627 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
628 struct efi_device_path **device_path,
629 struct efi_device_path **file_path);
630 efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
632 struct efi_device_path **device,
633 struct efi_device_path **file);
635 #define EFI_DP_TYPE(_dp, _type, _subtype) \
636 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
637 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
640 * Use these to indicate that your code / data should go into the EFI runtime
641 * section and thus still be available when the OS is running
643 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
644 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
646 /* Indicate supported runtime services */
647 efi_status_t efi_init_runtime_supported(void);
649 /* Update CRC32 in table header */
650 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
652 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
653 * to make it available at runtime */
654 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
656 /* Boards may provide the functions below to implement RTS functionality */
658 void __efi_runtime EFIAPI efi_reset_system(
659 enum efi_reset_type reset_type,
660 efi_status_t reset_status,
661 unsigned long data_size, void *reset_data);
663 /* Architecture specific initialization of the EFI subsystem */
664 efi_status_t efi_reset_system_init(void);
666 efi_status_t __efi_runtime EFIAPI efi_get_time(
667 struct efi_time *time,
668 struct efi_time_cap *capabilities);
670 efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
672 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
674 * Entry point for the tests of the EFI API.
675 * It is called by 'bootefi selftest'
677 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
678 struct efi_system_table *systab);
681 efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
682 const efi_guid_t *vendor, u32 *attributes,
683 efi_uintn_t *data_size, void *data);
684 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
687 efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
688 const efi_guid_t *vendor, u32 attributes,
689 efi_uintn_t data_size, const void *data);
691 efi_status_t EFIAPI efi_query_variable_info(
692 u32 attributes, u64 *maximum_variable_storage_size,
693 u64 *remaining_variable_storage_size,
694 u64 *maximum_variable_size);
697 * See section 3.1.3 in the v2.7 UEFI spec for more details on
698 * the layout of EFI_LOAD_OPTION. In short it is:
700 * typedef struct _EFI_LOAD_OPTION {
702 * UINT16 FilePathListLength;
703 * // CHAR16 Description[]; <-- variable length, NULL terminated
704 * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
705 * <-- FilePathListLength bytes
706 * // UINT8 OptionalData[];
709 struct efi_load_option {
711 u16 file_path_length;
713 struct efi_device_path *file_path;
714 const u8 *optional_data;
717 efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
719 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
720 efi_status_t efi_bootmgr_load(efi_handle_t *handle);
723 * efi_image_regions - A list of memory regions
725 * @max: Maximum number of regions
726 * @num: Number of regions
727 * @reg: array of regions
729 struct efi_image_regions {
732 struct image_region reg[];
736 * efi_sig_data - A decoded data of struct efi_signature_data
738 * This structure represents an internal form of signature in
739 * signature database. A listed list may represent a signature list.
741 * @next: Pointer to next entry
742 * @onwer: Signature owner
743 * @data: Pointer to signature data
744 * @size: Size of signature data
746 struct efi_sig_data {
747 struct efi_sig_data *next;
754 * efi_signature_store - A decoded data of signature database
756 * This structure represents an internal form of signature database.
758 * @next: Pointer to next entry
759 * @sig_type: Signature type
760 * @sig_data_list: Pointer to signature list
762 struct efi_signature_store {
763 struct efi_signature_store *next;
765 struct efi_sig_data *sig_data_list;
768 struct x509_certificate;
769 struct pkcs7_message;
771 bool efi_signature_lookup_digest(struct efi_image_regions *regs,
772 struct efi_signature_store *db);
773 bool efi_signature_verify_one(struct efi_image_regions *regs,
774 struct pkcs7_message *msg,
775 struct efi_signature_store *db);
776 bool efi_signature_verify_with_sigdb(struct efi_image_regions *regs,
777 struct pkcs7_message *msg,
778 struct efi_signature_store *db,
779 struct efi_signature_store *dbx);
780 bool efi_signature_check_signers(struct pkcs7_message *msg,
781 struct efi_signature_store *dbx);
783 efi_status_t efi_image_region_add(struct efi_image_regions *regs,
784 const void *start, const void *end,
787 void efi_sigstore_free(struct efi_signature_store *sigstore);
788 struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
790 bool efi_secure_boot_enabled(void);
792 bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
793 WIN_CERTIFICATE **auth, size_t *auth_len);
795 /* runtime implementation of memcpy() */
796 void efi_memcpy_runtime(void *dest, const void *src, size_t n);
798 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
800 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
801 #define __efi_runtime_data
802 #define __efi_runtime
803 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
808 /* No loader configured, stub out EFI_ENTRY */
809 static inline void efi_restore_gd(void) { }
810 static inline void efi_set_bootdev(const char *dev, const char *devnr,
811 const char *path) { }
812 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
813 static inline void efi_print_image_infos(void *pc) { }
815 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
817 #endif /* _EFI_LOADER_H */