1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * EFI application loader
5 * Copyright (c) 2016 Alexander Graf
9 #define _EFI_LOADER_H 1
19 #include <linux/list.h>
20 #include <linux/oid_registry.h>
25 static inline int guidcmp(const void *g1, const void *g2)
27 return memcmp(g1, g2, sizeof(efi_guid_t));
30 static inline void *guidcpy(void *dst, const void *src)
32 return memcpy(dst, src, sizeof(efi_guid_t));
35 #if CONFIG_IS_ENABLED(EFI_LOADER)
38 * __efi_runtime_data - declares a non-const variable for EFI runtime section
40 * This macro indicates that a variable is non-const and should go into the
41 * EFI runtime section, and thus still be available when the OS is running.
43 * Only use on variables not declared const.
49 * static __efi_runtime_data my_computed_table[256];
51 #define __efi_runtime_data __section(".data.efi_runtime")
54 * __efi_runtime_rodata - declares a read-only variable for EFI runtime section
56 * This macro indicates that a variable is read-only (const) and should go into
57 * the EFI runtime section, and thus still be available when the OS is running.
59 * Only use on variables also declared const.
65 * static const __efi_runtime_rodata my_const_table[] = { 1, 2, 3 };
67 #define __efi_runtime_rodata __section(".rodata.efi_runtime")
70 * __efi_runtime - declares a function for EFI runtime section
72 * This macro indicates that a function should go into the EFI runtime section,
73 * and thus still be available when the OS is running.
79 * static __efi_runtime compute_my_table(void);
81 #define __efi_runtime __section(".text.efi_runtime")
84 * Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
85 * to make it available at runtime
87 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
90 * Special case handler for error/abort that just tries to dtrt to get
91 * back to u-boot world
93 void efi_restore_gd(void);
94 /* Call this to set the current device name */
95 void efi_set_bootdev(const char *dev, const char *devnr, const char *path,
96 void *buffer, size_t buffer_size);
97 /* Called by networking code to memorize the dhcp ack package */
98 void efi_net_set_dhcp_ack(void *pkt, int len);
99 /* Print information about all loaded images */
100 void efi_print_image_infos(void *pc);
102 /* Hook at initialization */
103 efi_status_t efi_launch_capsules(void);
105 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
107 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
108 #define __efi_runtime_data
109 #define __efi_runtime_rodata
110 #define __efi_runtime
111 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
116 /* No loader configured, stub out EFI_ENTRY */
117 static inline void efi_restore_gd(void) { }
118 static inline void efi_set_bootdev(const char *dev, const char *devnr,
119 const char *path, void *buffer,
120 size_t buffer_size) { }
121 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
122 static inline void efi_print_image_infos(void *pc) { }
123 static inline efi_status_t efi_launch_capsules(void)
128 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
130 /* Maximum number of configuration tables */
131 #define EFI_MAX_CONFIGURATION_TABLES 16
133 /* GUID used by the root node */
134 #define U_BOOT_GUID \
135 EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
136 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
137 /* GUID used as root for blkmap devices */
138 #define U_BOOT_BLKMAP_DEV_GUID \
139 EFI_GUID(0x4cad859d, 0xd644, 0x42ff, \
140 0x87, 0x0b, 0xc0, 0x2e, 0xac, 0x05, 0x58, 0x63)
141 /* GUID used as host device on sandbox */
142 #define U_BOOT_HOST_DEV_GUID \
143 EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
144 0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
145 /* GUID used as root for virtio devices */
146 #define U_BOOT_VIRTIO_DEV_GUID \
147 EFI_GUID(0x63293792, 0xadf5, 0x9325, \
148 0xb9, 0x9f, 0x4e, 0x0e, 0x45, 0x5c, 0x1b, 0x1e)
150 /* GUID for the auto generated boot menu entry */
151 #define EFICONFIG_AUTO_GENERATED_ENTRY_GUID \
152 EFI_GUID(0x38c1acc1, 0x9fc0, 0x41f0, \
153 0xb9, 0x01, 0xfa, 0x74, 0xd6, 0xd6, 0xe4, 0xde)
155 /* Use internal device tree when starting UEFI application */
156 #define EFI_FDT_USE_INTERNAL NULL
159 extern efi_handle_t efi_root;
161 /* Set to EFI_SUCCESS when initialized */
162 extern efi_status_t efi_obj_list_initialized;
164 /* Flag used by the selftest to avoid detaching devices in ExitBootServices() */
165 extern bool efi_st_keep_devices;
167 /* EFI system partition */
168 extern struct efi_system_partition {
169 enum uclass_id uclass_id;
172 } efi_system_partition;
174 int __efi_entry_check(void);
175 int __efi_exit_check(void);
176 const char *__efi_nesting(void);
177 const char *__efi_nesting_inc(void);
178 const char *__efi_nesting_dec(void);
181 * Enter the u-boot world from UEFI:
183 #define EFI_ENTRY(format, ...) do { \
184 assert(__efi_entry_check()); \
185 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
186 __func__, ##__VA_ARGS__); \
190 * Exit the u-boot world back to UEFI:
192 #define EFI_EXIT(ret) ({ \
193 typeof(ret) _r = ret; \
194 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
195 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
196 assert(__efi_exit_check()); \
201 * Call non-void UEFI function from u-boot and retrieve return value:
203 #define EFI_CALL(exp) ({ \
204 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
205 assert(__efi_exit_check()); \
206 typeof(exp) _r = exp; \
207 assert(__efi_entry_check()); \
208 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
209 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
214 * Call void UEFI function from u-boot:
216 #define EFI_CALL_VOID(exp) do { \
217 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
218 assert(__efi_exit_check()); \
220 assert(__efi_entry_check()); \
221 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
225 * Write an indented message with EFI prefix
227 #define EFI_PRINT(format, ...) ({ \
228 debug("%sEFI: " format, __efi_nesting(), \
232 #ifdef CONFIG_SYS_CACHELINE_SIZE
233 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
235 /* Just use the greatest cache flush alignment requirement I'm aware of */
236 #define EFI_CACHELINE_SIZE 128
239 /* max bootmenu title size for volume selection */
240 #define BOOTMENU_DEVICE_NAME_MAX 16
242 /* Key identifying current memory map */
243 extern efi_uintn_t efi_memory_map_key;
245 extern struct efi_runtime_services efi_runtime_services;
246 extern struct efi_system_table systab;
248 extern struct efi_simple_text_output_protocol efi_con_out;
249 extern struct efi_simple_text_input_protocol efi_con_in;
250 extern struct efi_console_control_protocol efi_console_control;
251 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
252 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
253 extern const struct efi_device_path_utilities_protocol
254 efi_device_path_utilities;
255 /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
256 extern const struct efi_unicode_collation_protocol
257 efi_unicode_collation_protocol2;
258 extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
259 extern const struct efi_hii_config_access_protocol efi_hii_config_access;
260 extern const struct efi_hii_database_protocol efi_hii_database;
261 extern const struct efi_hii_string_protocol efi_hii_string;
263 uint16_t *efi_dp_str(struct efi_device_path *dp);
265 /* GUID for the auto generated boot menu entry */
266 extern const efi_guid_t efi_guid_bootmenu_auto_generated;
268 /* GUID of the U-Boot root node */
269 extern const efi_guid_t efi_u_boot_guid;
270 #ifdef CONFIG_SANDBOX
271 /* GUID of U-Boot host device on sandbox */
272 extern const efi_guid_t efi_guid_host_dev;
274 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
275 extern const efi_guid_t efi_block_io_guid;
276 extern const efi_guid_t efi_global_variable_guid;
277 extern const efi_guid_t efi_guid_console_control;
278 extern const efi_guid_t efi_guid_device_path;
279 /* GUID of the EFI system partition */
280 extern const efi_guid_t efi_system_partition_guid;
281 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
282 extern const efi_guid_t efi_guid_driver_binding_protocol;
283 /* event group ExitBootServices() invoked */
284 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
285 /* event group SetVirtualAddressMap() invoked */
286 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
287 /* event group memory map changed */
288 extern const efi_guid_t efi_guid_event_group_memory_map_change;
289 /* event group boot manager about to boot */
290 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
291 /* event group ResetSystem() invoked (before ExitBootServices) */
292 extern const efi_guid_t efi_guid_event_group_reset_system;
293 /* GUID of the device tree table */
294 extern const efi_guid_t efi_guid_fdt;
295 extern const efi_guid_t efi_guid_loaded_image;
296 extern const efi_guid_t efi_guid_loaded_image_device_path;
297 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
298 extern const efi_guid_t efi_simple_file_system_protocol_guid;
299 extern const efi_guid_t efi_file_info_guid;
300 /* GUID for file system information */
301 extern const efi_guid_t efi_file_system_info_guid;
302 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
303 /* GUID of the deprecated Unicode collation protocol */
304 extern const efi_guid_t efi_guid_unicode_collation_protocol;
305 /* GUIDs of the Load File and Load File2 protocol */
306 extern const efi_guid_t efi_guid_load_file_protocol;
307 extern const efi_guid_t efi_guid_load_file2_protocol;
308 /* GUID of the Unicode collation protocol */
309 extern const efi_guid_t efi_guid_unicode_collation_protocol2;
310 extern const efi_guid_t efi_guid_hii_config_routing_protocol;
311 extern const efi_guid_t efi_guid_hii_config_access_protocol;
312 extern const efi_guid_t efi_guid_hii_database_protocol;
313 extern const efi_guid_t efi_guid_hii_string_protocol;
314 /* GUIDs for authentication */
315 extern const efi_guid_t efi_guid_image_security_database;
316 extern const efi_guid_t efi_guid_sha256;
317 extern const efi_guid_t efi_guid_cert_x509;
318 extern const efi_guid_t efi_guid_cert_x509_sha256;
319 extern const efi_guid_t efi_guid_cert_x509_sha384;
320 extern const efi_guid_t efi_guid_cert_x509_sha512;
321 extern const efi_guid_t efi_guid_cert_type_pkcs7;
323 /* GUID of RNG protocol */
324 extern const efi_guid_t efi_guid_rng_protocol;
325 /* GUID of capsule update result */
326 extern const efi_guid_t efi_guid_capsule_report;
327 /* GUID of firmware management protocol */
328 extern const efi_guid_t efi_guid_firmware_management_protocol;
329 /* GUID for the ESRT */
330 extern const efi_guid_t efi_esrt_guid;
331 /* GUID of the SMBIOS table */
332 extern const efi_guid_t smbios_guid;
334 extern const efi_guid_t efi_guid_text_input_protocol;
335 extern const efi_guid_t efi_guid_text_output_protocol;
337 extern char __efi_runtime_start[], __efi_runtime_stop[];
338 extern char __efi_runtime_rel_start[], __efi_runtime_rel_stop[];
341 * struct efi_open_protocol_info_item - open protocol info item
343 * When a protocol is opened a open protocol info entry is created.
344 * These are maintained in a list.
346 * @link: link to the list of open protocol info entries of a protocol
347 * @info: information about the opening of a protocol
349 struct efi_open_protocol_info_item {
350 struct list_head link;
351 struct efi_open_protocol_info_entry info;
355 * struct efi_handler - single protocol interface of a handle
357 * When the UEFI payload wants to open a protocol on an object to get its
358 * interface (usually a struct with callback functions), this struct maps the
359 * protocol GUID to the respective protocol interface
361 * @link: link to the list of protocols of a handle
362 * @guid: GUID of the protocol
363 * @protocol_interface: protocol interface
364 * @open_infos: link to the list of open protocol info items
367 struct list_head link;
368 const efi_guid_t guid;
369 void *protocol_interface;
370 struct list_head open_infos;
374 * enum efi_object_type - type of EFI object
376 * In UnloadImage we must be able to identify if the handle relates to a
379 enum efi_object_type {
380 /** @EFI_OBJECT_TYPE_UNDEFINED: undefined image type */
381 EFI_OBJECT_TYPE_UNDEFINED = 0,
382 /** @EFI_OBJECT_TYPE_U_BOOT_FIRMWARE: U-Boot firmware */
383 EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
384 /** @EFI_OBJECT_TYPE_LOADED_IMAGE: loaded image (not started) */
385 EFI_OBJECT_TYPE_LOADED_IMAGE,
386 /** @EFI_OBJECT_TYPE_STARTED_IMAGE: started image */
387 EFI_OBJECT_TYPE_STARTED_IMAGE,
391 * struct efi_object - dereferenced EFI handle
393 * @link: pointers to put the handle into a linked list
394 * @protocols: linked list with the protocol interfaces installed on this
396 * @type: image type if the handle relates to an image
397 * @dev: pointer to the DM device which is associated with this EFI handle
399 * UEFI offers a flexible and expandable object model. The objects in the UEFI
400 * API are devices, drivers, and loaded images. struct efi_object is our storage
401 * structure for these objects.
403 * When including this structure into a larger structure always put it first so
404 * that when deleting a handle the whole encompassing structure can be freed.
406 * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
407 * has been created for such pointers.
410 /* Every UEFI object is part of a global object list */
411 struct list_head link;
412 /* The list of protocols */
413 struct list_head protocols;
414 enum efi_object_type type;
418 enum efi_image_auth_status {
419 EFI_IMAGE_AUTH_FAILED = 0,
420 EFI_IMAGE_AUTH_PASSED,
424 * struct efi_loaded_image_obj - handle of a loaded image
426 * @header: EFI object header
427 * @exit_status: exit status passed to Exit()
428 * @exit_data_size: exit data size passed to Exit()
429 * @exit_data: exit data passed to Exit()
430 * @exit_jmp: long jump buffer for returning from started image
431 * @entry: entry address of the relocated image
432 * @image_type: indicates if the image is an applicition or a driver
433 * @auth_status: indicates if the image is authenticated
435 struct efi_loaded_image_obj {
436 struct efi_object header;
437 efi_status_t *exit_status;
438 efi_uintn_t *exit_data_size;
440 struct jmp_buf_data *exit_jmp;
441 EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
442 struct efi_system_table *st);
444 enum efi_image_auth_status auth_status;
450 * @link: Link to list of all events
451 * @queue_link: Link to the list of queued events
452 * @type: Type of event, see efi_create_event
453 * @notify_tpl: Task priority level of notifications
454 * @notify_function: Function to call when the event is triggered
455 * @notify_context: Data to be passed to the notify function
456 * @group: Event group
457 * @trigger_time: Period of the timer
458 * @trigger_next: Next time to trigger the timer
459 * @trigger_type: Type of timer, see efi_set_timer
460 * @is_signaled: The event occurred. The event is in the signaled state.
463 struct list_head link;
464 struct list_head queue_link;
466 efi_uintn_t notify_tpl;
467 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
468 void *notify_context;
469 const efi_guid_t *group;
472 enum efi_timer_delay trigger_type;
476 /* This list contains all UEFI objects we know of */
477 extern struct list_head efi_obj_list;
478 /* List of all events */
479 extern struct list_head efi_events;
482 * struct efi_protocol_notification - handle for notified protocol
484 * When a protocol interface is installed for which an event was registered with
485 * the RegisterProtocolNotify() service this structure is used to hold the
486 * handle on which the protocol interface was installed.
488 * @link: link to list of all handles notified for this event
489 * @handle: handle on which the notified protocol interface was installed
491 struct efi_protocol_notification {
492 struct list_head link;
497 * struct efi_register_notify_event - event registered by
498 * RegisterProtocolNotify()
500 * The address of this structure serves as registration value.
502 * @link: link to list of all registered events
503 * @event: registered event. The same event may registered for multiple
505 * @protocol: protocol for which the event is registered
506 * @handles: linked list of all handles on which the notified protocol was
509 struct efi_register_notify_event {
510 struct list_head link;
511 struct efi_event *event;
513 struct list_head handles;
516 /* called at pre-initialization */
517 int efi_init_early(void);
518 /* Initialize efi execution environment */
519 efi_status_t efi_init_obj_list(void);
520 /* Append new boot option in BootOrder variable */
521 efi_status_t efi_bootmgr_append_bootorder(u16 index);
522 /* Get unused "Boot####" index */
523 efi_status_t efi_bootmgr_get_unused_bootoption(u16 *buf,
524 efi_uintn_t buf_size, u32 *index);
525 /* Generate the media device boot option */
526 efi_status_t efi_bootmgr_update_media_device_boot_option(void);
527 /* Delete selected boot option */
528 efi_status_t efi_bootmgr_delete_boot_option(u16 boot_index);
529 /* search the boot option index in BootOrder */
530 bool efi_search_bootorder(u16 *bootorder, efi_uintn_t num, u32 target, u32 *index);
531 /* Set up console modes */
532 void efi_setup_console_size(void);
533 /* Install device tree */
534 efi_status_t efi_install_fdt(void *fdt);
535 /* Run loaded UEFI image */
536 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
537 /* Initialize variable services */
538 efi_status_t efi_init_variables(void);
539 /* Notify ExitBootServices() is called */
540 void efi_variables_boot_exit_notify(void);
541 efi_status_t efi_tcg2_notify_exit_boot_services_failed(void);
542 /* Measure efi application invocation */
543 efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *handle);
544 /* Measure efi application exit */
545 efi_status_t efi_tcg2_measure_efi_app_exit(void);
547 efi_status_t efi_tcg2_measure_dtb(void *dtb);
548 /* Called by bootefi to initialize root node */
549 efi_status_t efi_root_node_register(void);
550 /* Called by bootefi to initialize runtime */
551 efi_status_t efi_initialize_system_table(void);
552 /* efi_runtime_detach() - detach unimplemented runtime functions */
553 void efi_runtime_detach(void);
554 /* efi_convert_pointer() - convert pointer to virtual address */
555 efi_status_t EFIAPI efi_convert_pointer(efi_uintn_t debug_disposition,
557 /* Carve out DT reserved memory ranges */
558 void efi_carve_out_dt_rsv(void *fdt);
559 /* Purge unused kaslr-seed */
560 void efi_try_purge_kaslr_seed(void *fdt);
561 /* Called by bootefi to make console interface available */
562 efi_status_t efi_console_register(void);
563 /* Called by efi_init_obj_list() to proble all block devices */
564 efi_status_t efi_disks_register(void);
565 /* Called by efi_init_obj_list() to install EFI_RNG_PROTOCOL */
566 efi_status_t efi_rng_register(void);
567 /* Called by efi_init_obj_list() to install EFI_TCG2_PROTOCOL */
568 efi_status_t efi_tcg2_register(void);
569 /* Called by efi_init_obj_list() to install RISCV_EFI_BOOT_PROTOCOL */
570 efi_status_t efi_riscv_register(void);
571 /* Called by efi_init_obj_list() to do initial measurement */
572 efi_status_t efi_tcg2_do_initial_measurement(void);
573 /* measure the pe-coff image, extend PCR and add Event Log */
574 efi_status_t tcg2_measure_pe_image(void *efi, u64 efi_size,
575 struct efi_loaded_image_obj *handle,
576 struct efi_loaded_image *loaded_image_info);
577 /* Create handles and protocols for the partitions of a block device */
578 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
579 const char *uclass_idname, int diskid,
580 const char *pdevname);
581 /* Called by bootefi to make GOP (graphical) interface available */
582 efi_status_t efi_gop_register(void);
583 /* Called by bootefi to make the network interface available */
584 efi_status_t efi_net_register(void);
585 /* Called by bootefi to make the watchdog available */
586 efi_status_t efi_watchdog_register(void);
587 efi_status_t efi_initrd_register(void);
588 efi_status_t efi_initrd_deregister(void);
589 /* Called by bootefi to make SMBIOS tables available */
591 * efi_acpi_register() - write out ACPI tables
593 * Called by bootefi to make ACPI tables available
595 * Return: 0 if OK, -ENOMEM if no memory is available for the tables
597 efi_status_t efi_acpi_register(void);
599 * efi_smbios_register() - write out SMBIOS tables
601 * Called by bootefi to make SMBIOS tables available
603 * Return: 0 if OK, -ENOMEM if no memory is available for the tables
605 efi_status_t efi_smbios_register(void);
607 struct efi_simple_file_system_protocol *
608 efi_fs_from_path(struct efi_device_path *fp);
610 /* Called by efi_set_watchdog_timer to reset the timer */
611 efi_status_t efi_set_watchdog(unsigned long timeout);
613 /* Called from places to check whether a timer expired */
614 void efi_timer_check(void);
615 /* Check if a buffer contains a PE-COFF image */
616 efi_status_t efi_check_pe(void *buffer, size_t size, void **nt_header);
617 /* PE loader implementation */
618 efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
619 void *efi, size_t efi_size,
620 struct efi_loaded_image *loaded_image_info);
621 /* Called once to store the pristine gd pointer */
622 void efi_save_gd(void);
623 /* Call this to relocate the runtime section to an address space */
624 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
625 /* Call this to get image parameters */
626 void efi_get_image_parameters(void **img_addr, size_t *img_size);
627 /* Add a new object to the object list. */
628 void efi_add_handle(efi_handle_t obj);
630 efi_status_t efi_create_handle(efi_handle_t *handle);
632 efi_status_t efi_delete_handle(efi_handle_t obj);
633 /* Call this to validate a handle and find the EFI object for it */
634 struct efi_object *efi_search_obj(const efi_handle_t handle);
635 /* Locate device_path handle */
636 efi_status_t EFIAPI efi_locate_device_path(const efi_guid_t *protocol,
637 struct efi_device_path **device_path,
638 efi_handle_t *device);
640 efi_status_t EFIAPI efi_load_image(bool boot_policy,
641 efi_handle_t parent_image,
642 struct efi_device_path *file_path,
644 efi_uintn_t source_size,
645 efi_handle_t *image_handle);
647 efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
648 efi_uintn_t *exit_data_size,
651 efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
652 /* Find a protocol on a handle */
653 efi_status_t efi_search_protocol(const efi_handle_t handle,
654 const efi_guid_t *protocol_guid,
655 struct efi_handler **handler);
656 /* Install new protocol on a handle */
657 efi_status_t efi_add_protocol(const efi_handle_t handle,
658 const efi_guid_t *protocol,
659 void *protocol_interface);
661 efi_status_t efi_protocol_open(struct efi_handler *handler,
662 void **protocol_interface, void *agent_handle,
663 void *controller_handle, uint32_t attributes);
665 /* Install multiple protocol interfaces */
667 efi_install_multiple_protocol_interfaces(efi_handle_t *handle, ...);
669 efi_uninstall_multiple_protocol_interfaces(efi_handle_t handle, ...);
670 /* Get handles that support a given protocol */
671 efi_status_t EFIAPI efi_locate_handle_buffer(
672 enum efi_locate_search_type search_type,
673 const efi_guid_t *protocol, void *search_key,
674 efi_uintn_t *no_handles, efi_handle_t **buffer);
675 /* Close a previously opened protocol interface */
676 efi_status_t efi_close_protocol(efi_handle_t handle, const efi_guid_t *protocol,
677 efi_handle_t agent_handle,
678 efi_handle_t controller_handle);
679 /* Open a protocol interface */
680 efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
681 const efi_guid_t *protocol,
682 void **protocol_interface);
683 /* Call this to create an event */
684 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
685 void (EFIAPI *notify_function) (
686 struct efi_event *event,
688 void *notify_context, efi_guid_t *group,
689 struct efi_event **event);
690 /* Call this to set a timer */
691 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
692 uint64_t trigger_time);
693 /* Call this to signal an event */
694 void efi_signal_event(struct efi_event *event);
696 /* return true if the device is removable */
697 bool efi_disk_is_removable(efi_handle_t handle);
700 * efi_create_simple_file_system() - create simple file system protocol
702 * Create a simple file system protocol for a partition.
704 * @desc: block device descriptor
705 * @part: partition number
707 * @fsp: simple file system protocol
708 * Return: status code
711 efi_create_simple_file_system(struct blk_desc *desc, int part,
712 struct efi_device_path *dp,
713 struct efi_simple_file_system_protocol **fsp);
715 /* open file from device-path: */
716 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
718 /* Registers a callback function for a notification event. */
719 efi_status_t EFIAPI efi_register_protocol_notify(const efi_guid_t *protocol,
720 struct efi_event *event,
721 void **registration);
722 efi_status_t efi_file_size(struct efi_file_handle *fh, efi_uintn_t *size);
724 /* get a device path from a Boot#### option */
725 struct efi_device_path *efi_get_dp_from_boot(const efi_guid_t guid);
727 /* get len, string (used in u-boot crypto from a guid */
728 const char *guid_to_sha_str(const efi_guid_t *guid);
729 int algo_to_len(const char *algo);
731 int efi_link_dev(efi_handle_t handle, struct udevice *dev);
732 int efi_unlink_dev(efi_handle_t handle);
733 bool efi_varname_is_load_option(u16 *var_name16, int *index);
734 efi_status_t efi_next_variable_name(efi_uintn_t *size, u16 **buf,
738 * efi_size_in_pages() - convert size in bytes to size in pages
740 * This macro returns the number of EFI memory pages required to hold 'size'
743 * @size: size in bytes
744 * Return: size in pages
746 #define efi_size_in_pages(size) (((size) + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
747 /* Allocate boot service data pool memory */
748 void *efi_alloc(size_t len);
749 /* Allocate pages on the specified alignment */
750 void *efi_alloc_aligned_pages(u64 len, int memory_type, size_t align);
751 /* More specific EFI memory allocator, called by EFI payloads */
752 efi_status_t efi_allocate_pages(enum efi_allocate_type type,
753 enum efi_memory_type memory_type,
754 efi_uintn_t pages, uint64_t *memory);
755 /* EFI memory free function. */
756 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
757 /* EFI memory allocator for small allocations */
758 efi_status_t efi_allocate_pool(enum efi_memory_type pool_type,
759 efi_uintn_t size, void **buffer);
760 /* EFI pool memory free function. */
761 efi_status_t efi_free_pool(void *buffer);
762 /* Allocate and retrieve EFI memory map */
763 efi_status_t efi_get_memory_map_alloc(efi_uintn_t *map_size,
764 struct efi_mem_desc **memory_map);
765 /* Returns the EFI memory map */
766 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
767 struct efi_mem_desc *memory_map,
768 efi_uintn_t *map_key,
769 efi_uintn_t *descriptor_size,
770 uint32_t *descriptor_version);
771 /* Adds a range into the EFI memory map */
772 efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type);
773 /* Adds a conventional range into the EFI memory map */
774 efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
777 /* Called by board init to initialize the EFI drivers */
778 efi_status_t efi_driver_init(void);
779 /* Called when a block device is added */
780 int efi_disk_probe(void *ctx, struct event *event);
781 /* Called when a block device is removed */
782 int efi_disk_remove(void *ctx, struct event *event);
783 /* Called by board init to initialize the EFI memory map */
784 int efi_memory_init(void);
785 /* Adds new or overrides configuration table entry to the system table */
786 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
787 /* Sets up a loaded image */
788 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
789 struct efi_device_path *file_path,
790 struct efi_loaded_image_obj **handle_ptr,
791 struct efi_loaded_image **info_ptr);
793 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
794 extern void *efi_bounce_buffer;
795 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
798 /* shorten device path */
799 struct efi_device_path *efi_dp_shorten(struct efi_device_path *dp);
800 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
801 int efi_dp_match(const struct efi_device_path *a,
802 const struct efi_device_path *b);
803 efi_handle_t efi_dp_find_obj(struct efi_device_path *dp,
804 const efi_guid_t *guid,
805 struct efi_device_path **rem);
806 /* get size of the first device path instance excluding end node */
807 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
808 /* size of multi-instance device path excluding end node */
809 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
810 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
811 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
812 const struct efi_device_path *dp2);
813 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
814 const struct efi_device_path *node);
815 /* Create a device path node of given type, sub-type, length */
816 struct efi_device_path *efi_dp_create_device_node(const u8 type,
819 /* Append device path instance */
820 struct efi_device_path *efi_dp_append_instance(
821 const struct efi_device_path *dp,
822 const struct efi_device_path *dpi);
823 /* Get next device path instance */
824 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
826 /* Check if a device path contains muliple instances */
827 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
829 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
830 /* Create a device node for a block device partition. */
831 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
832 struct efi_device_path *efi_dp_from_file(const struct efi_device_path *dp,
834 struct efi_device_path *efi_dp_from_eth(void);
835 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
836 uint64_t start_address,
837 uint64_t end_address);
838 /* Determine the last device path node that is not the end node. */
839 const struct efi_device_path *efi_dp_last_node(
840 const struct efi_device_path *dp);
841 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
842 struct efi_device_path **device_path,
843 struct efi_device_path **file_path);
844 struct efi_device_path *efi_dp_from_uart(void);
845 efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
847 struct efi_device_path **device,
848 struct efi_device_path **file);
849 ssize_t efi_dp_check_length(const struct efi_device_path *dp,
850 const size_t maxlen);
852 #define EFI_DP_TYPE(_dp, _type, _subtype) \
853 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
854 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
856 /* template END node: */
857 extern const struct efi_device_path END;
859 /* Indicate supported runtime services */
860 efi_status_t efi_init_runtime_supported(void);
862 /* Update CRC32 in table header */
863 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
865 /* Boards may provide the functions below to implement RTS functionality */
867 void __efi_runtime EFIAPI efi_reset_system(
868 enum efi_reset_type reset_type,
869 efi_status_t reset_status,
870 unsigned long data_size, void *reset_data);
872 /* Architecture specific initialization of the EFI subsystem */
873 efi_status_t efi_reset_system_init(void);
875 efi_status_t __efi_runtime EFIAPI efi_get_time(
876 struct efi_time *time,
877 struct efi_time_cap *capabilities);
879 efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
881 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
883 * Entry point for the tests of the EFI API.
884 * It is called by 'bootefi selftest'
886 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
887 struct efi_system_table *systab);
890 efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
891 const efi_guid_t *vendor, u32 *attributes,
892 efi_uintn_t *data_size, void *data);
893 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
896 efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
897 const efi_guid_t *vendor, u32 attributes,
898 efi_uintn_t data_size, const void *data);
900 efi_status_t EFIAPI efi_query_variable_info(
901 u32 attributes, u64 *maximum_variable_storage_size,
902 u64 *remaining_variable_storage_size,
903 u64 *maximum_variable_size);
905 void *efi_get_var(const u16 *name, const efi_guid_t *vendor, efi_uintn_t *size);
908 * See section 3.1.3 in the v2.7 UEFI spec for more details on
909 * the layout of EFI_LOAD_OPTION. In short it is:
911 * typedef struct _EFI_LOAD_OPTION {
913 * UINT16 FilePathListLength;
914 * // CHAR16 Description[]; <-- variable length, NULL terminated
915 * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
916 * <-- FilePathListLength bytes
917 * // UINT8 OptionalData[];
920 struct efi_load_option {
922 u16 file_path_length;
924 struct efi_device_path *file_path;
925 const u8 *optional_data;
928 struct efi_device_path *efi_dp_from_lo(struct efi_load_option *lo,
929 const efi_guid_t *guid);
930 struct efi_device_path *efi_dp_concat(const struct efi_device_path *dp1,
931 const struct efi_device_path *dp2);
932 struct efi_device_path *search_gpt_dp_node(struct efi_device_path *device_path);
933 efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
935 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
936 efi_status_t efi_set_load_options(efi_handle_t handle,
937 efi_uintn_t load_options_size,
939 efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options);
942 * struct efi_image_regions - A list of memory regions
944 * @max: Maximum number of regions
945 * @num: Number of regions
946 * @reg: array of regions
948 struct efi_image_regions {
951 struct image_region reg[];
955 * struct efi_sig_data - A decoded data of struct efi_signature_data
957 * This structure represents an internal form of signature in
958 * signature database. A listed list may represent a signature list.
960 * @next: Pointer to next entry
961 * @owner: Signature owner
962 * @data: Pointer to signature data
963 * @size: Size of signature data
965 struct efi_sig_data {
966 struct efi_sig_data *next;
973 * struct efi_signature_store - A decoded data of signature database
975 * This structure represents an internal form of signature database.
977 * @next: Pointer to next entry
978 * @sig_type: Signature type
979 * @sig_data_list: Pointer to signature list
981 struct efi_signature_store {
982 struct efi_signature_store *next;
984 struct efi_sig_data *sig_data_list;
987 struct x509_certificate;
988 struct pkcs7_message;
991 * struct eficonfig_media_boot_option - boot option for (removable) media device
993 * This structure is used to enumerate possible boot option
995 * @lo: Serialized load option data
996 * @size: Size of serialized load option data
997 * @exist: Flag to indicate the load option already exists
998 * in Non-volatile load option
1000 struct eficonfig_media_boot_option {
1006 bool efi_hash_regions(struct image_region *regs, int count,
1007 void **hash, const char *hash_algo, int *len);
1008 bool efi_signature_lookup_digest(struct efi_image_regions *regs,
1009 struct efi_signature_store *db,
1011 bool efi_signature_verify(struct efi_image_regions *regs,
1012 struct pkcs7_message *msg,
1013 struct efi_signature_store *db,
1014 struct efi_signature_store *dbx);
1015 static inline bool efi_signature_verify_one(struct efi_image_regions *regs,
1016 struct pkcs7_message *msg,
1017 struct efi_signature_store *db)
1019 return efi_signature_verify(regs, msg, db, NULL);
1021 bool efi_signature_check_signers(struct pkcs7_message *msg,
1022 struct efi_signature_store *dbx);
1024 efi_status_t efi_image_region_add(struct efi_image_regions *regs,
1025 const void *start, const void *end,
1028 void efi_sigstore_free(struct efi_signature_store *sigstore);
1029 struct efi_signature_store *efi_build_signature_store(void *sig_list,
1031 struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
1033 bool efi_secure_boot_enabled(void);
1035 bool efi_capsule_auth_enabled(void);
1037 void *efi_prepare_aligned_image(void *efi, u64 *efi_size);
1039 bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
1040 WIN_CERTIFICATE **auth, size_t *auth_len);
1042 struct pkcs7_message *efi_parse_pkcs7_header(const void *buf,
1046 /* runtime implementation of memcpy() */
1047 void efi_memcpy_runtime(void *dest, const void *src, size_t n);
1049 /* commonly used helper functions */
1050 u16 *efi_create_indexed_name(u16 *buffer, size_t buffer_size, const char *name,
1051 unsigned int index);
1052 efi_string_t efi_convert_string(const char *str);
1054 extern const struct efi_firmware_management_protocol efi_fmp_fit;
1055 extern const struct efi_firmware_management_protocol efi_fmp_raw;
1057 /* Capsule update */
1058 efi_status_t EFIAPI efi_update_capsule(
1059 struct efi_capsule_header **capsule_header_array,
1060 efi_uintn_t capsule_count,
1061 u64 scatter_gather_list);
1062 efi_status_t EFIAPI efi_query_capsule_caps(
1063 struct efi_capsule_header **capsule_header_array,
1064 efi_uintn_t capsule_count,
1065 u64 *maximum_capsule_size,
1068 efi_status_t efi_capsule_authenticate(const void *capsule,
1069 efi_uintn_t capsule_size,
1070 void **image, efi_uintn_t *image_size);
1072 #define EFI_CAPSULE_DIR u"\\EFI\\UpdateCapsule\\"
1075 * struct efi_fw_image - Information on firmware images updatable through
1078 * This structure gives information about the firmware images on the platform
1079 * which can be updated through the capsule update mechanism
1081 * @image_type_id: Image GUID. Same value is to be used in the capsule
1082 * @fw_name: Name of the firmware image
1083 * @image_index: Image Index, same as value passed to SetImage FMP
1086 struct efi_fw_image {
1087 efi_guid_t image_type_id;
1093 * struct efi_capsule_update_info - Information needed for capsule updates
1095 * This structure provides information needed for performing firmware
1096 * updates. The structure needs to be initialised per platform, for all
1097 * platforms which enable capsule updates
1099 * @dfu_string: String used to populate dfu_alt_info
1100 * @num_images: The number of images array entries
1101 * @images: Pointer to an array of updatable images
1103 struct efi_capsule_update_info {
1104 const char *dfu_string;
1106 struct efi_fw_image *images;
1109 extern struct efi_capsule_update_info update_info;
1112 * Install the ESRT system table.
1114 * Return: status code
1116 efi_status_t efi_esrt_register(void);
1119 * efi_ecpt_register() - Install the ECPT system table.
1121 * Return: status code
1123 efi_status_t efi_ecpt_register(void);
1126 * efi_esrt_populate() - Populates the ESRT entries from the FMP instances
1127 * present in the system.
1128 * If an ESRT already exists, the old ESRT is replaced in the system table.
1129 * The memory of the old ESRT is deallocated.
1132 * - EFI_SUCCESS if the ESRT is correctly created
1133 * - error code otherwise.
1135 efi_status_t efi_esrt_populate(void);
1136 efi_status_t efi_load_capsule_drivers(void);
1138 efi_status_t platform_get_eventlog(struct udevice *dev, u64 *addr, u32 *sz);
1140 efi_status_t efi_locate_handle_buffer_int(enum efi_locate_search_type search_type,
1141 const efi_guid_t *protocol, void *search_key,
1142 efi_uintn_t *no_handles, efi_handle_t **buffer);
1144 efi_status_t efi_open_volume_int(struct efi_simple_file_system_protocol *this,
1145 struct efi_file_handle **root);
1146 efi_status_t efi_file_open_int(struct efi_file_handle *this,
1147 struct efi_file_handle **new_handle,
1148 u16 *file_name, u64 open_mode,
1150 efi_status_t efi_file_close_int(struct efi_file_handle *file);
1151 efi_status_t efi_file_read_int(struct efi_file_handle *this,
1152 efi_uintn_t *buffer_size, void *buffer);
1153 efi_status_t efi_file_setpos_int(struct efi_file_handle *file, u64 pos);
1155 typedef efi_status_t (*efi_console_filter_func)(struct efi_input_key *key);
1156 efi_status_t efi_console_get_u16_string
1157 (struct efi_simple_text_input_protocol *cin,
1158 u16 *buf, efi_uintn_t count, efi_console_filter_func filer_func,
1161 efi_status_t efi_disk_get_device_name(const efi_handle_t handle, char *buf, int size);
1164 * efi_add_known_memory() - add memory banks to EFI memory map
1166 * This weak function may be overridden for specific architectures.
1168 void efi_add_known_memory(void);
1170 #endif /* _EFI_LOADER_H */