efi_loader.h 29 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * EFI application loader
  4. *
  5. * Copyright (c) 2016 Alexander Graf
  6. */
  7. #ifndef _EFI_LOADER_H
  8. #define _EFI_LOADER_H 1
  9. #include <common.h>
  10. #include <blk.h>
  11. #include <log.h>
  12. #include <part_efi.h>
  13. #include <efi_api.h>
  14. #include <image.h>
  15. #include <pe.h>
  16. struct blk_desc;
  17. static inline int guidcmp(const void *g1, const void *g2)
  18. {
  19. return memcmp(g1, g2, sizeof(efi_guid_t));
  20. }
  21. static inline void *guidcpy(void *dst, const void *src)
  22. {
  23. return memcpy(dst, src, sizeof(efi_guid_t));
  24. }
  25. /* No need for efi loader support in SPL */
  26. #if CONFIG_IS_ENABLED(EFI_LOADER)
  27. #include <linux/list.h>
  28. #include <linux/oid_registry.h>
  29. /* Maximum number of configuration tables */
  30. #define EFI_MAX_CONFIGURATION_TABLES 16
  31. /* GUID used by the root node */
  32. #define U_BOOT_GUID \
  33. EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
  34. 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
  35. /* GUID used as host device on sandbox */
  36. #define U_BOOT_HOST_DEV_GUID \
  37. EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
  38. 0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
  39. /* GUID used as root for virtio devices */
  40. #define U_BOOT_VIRTIO_DEV_GUID \
  41. EFI_GUID(0x63293792, 0xadf5, 0x9325, \
  42. 0xb9, 0x9f, 0x4e, 0x0e, 0x45, 0x5c, 0x1b, 0x1e)
  43. /* Use internal device tree when starting UEFI application */
  44. #define EFI_FDT_USE_INTERNAL NULL
  45. /* Root node */
  46. extern efi_handle_t efi_root;
  47. /* Set to EFI_SUCCESS when initialized */
  48. extern efi_status_t efi_obj_list_initialized;
  49. /* Flag used by the selftest to avoid detaching devices in ExitBootServices() */
  50. extern bool efi_st_keep_devices;
  51. /* EFI system partition */
  52. extern struct efi_system_partition {
  53. enum if_type if_type;
  54. int devnum;
  55. u8 part;
  56. } efi_system_partition;
  57. int __efi_entry_check(void);
  58. int __efi_exit_check(void);
  59. const char *__efi_nesting(void);
  60. const char *__efi_nesting_inc(void);
  61. const char *__efi_nesting_dec(void);
  62. /*
  63. * Enter the u-boot world from UEFI:
  64. */
  65. #define EFI_ENTRY(format, ...) do { \
  66. assert(__efi_entry_check()); \
  67. debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
  68. __func__, ##__VA_ARGS__); \
  69. } while(0)
  70. /*
  71. * Exit the u-boot world back to UEFI:
  72. */
  73. #define EFI_EXIT(ret) ({ \
  74. typeof(ret) _r = ret; \
  75. debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
  76. __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
  77. assert(__efi_exit_check()); \
  78. _r; \
  79. })
  80. /*
  81. * Call non-void UEFI function from u-boot and retrieve return value:
  82. */
  83. #define EFI_CALL(exp) ({ \
  84. debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
  85. assert(__efi_exit_check()); \
  86. typeof(exp) _r = exp; \
  87. assert(__efi_entry_check()); \
  88. debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
  89. (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
  90. _r; \
  91. })
  92. /*
  93. * Call void UEFI function from u-boot:
  94. */
  95. #define EFI_CALL_VOID(exp) do { \
  96. debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
  97. assert(__efi_exit_check()); \
  98. exp; \
  99. assert(__efi_entry_check()); \
  100. debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
  101. } while(0)
  102. /*
  103. * Write an indented message with EFI prefix
  104. */
  105. #define EFI_PRINT(format, ...) ({ \
  106. debug("%sEFI: " format, __efi_nesting(), \
  107. ##__VA_ARGS__); \
  108. })
  109. #ifdef CONFIG_SYS_CACHELINE_SIZE
  110. #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
  111. #else
  112. /* Just use the greatest cache flush alignment requirement I'm aware of */
  113. #define EFI_CACHELINE_SIZE 128
  114. #endif
  115. /* Key identifying current memory map */
  116. extern efi_uintn_t efi_memory_map_key;
  117. extern struct efi_runtime_services efi_runtime_services;
  118. extern struct efi_system_table systab;
  119. extern struct efi_simple_text_output_protocol efi_con_out;
  120. extern struct efi_simple_text_input_protocol efi_con_in;
  121. extern struct efi_console_control_protocol efi_console_control;
  122. extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
  123. /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
  124. extern const struct efi_device_path_utilities_protocol
  125. efi_device_path_utilities;
  126. /* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */
  127. extern const struct efi_unicode_collation_protocol
  128. efi_unicode_collation_protocol;
  129. /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
  130. extern const struct efi_unicode_collation_protocol
  131. efi_unicode_collation_protocol2;
  132. extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
  133. extern const struct efi_hii_config_access_protocol efi_hii_config_access;
  134. extern const struct efi_hii_database_protocol efi_hii_database;
  135. extern const struct efi_hii_string_protocol efi_hii_string;
  136. uint16_t *efi_dp_str(struct efi_device_path *dp);
  137. /* GUID of the U-Boot root node */
  138. extern const efi_guid_t efi_u_boot_guid;
  139. #ifdef CONFIG_SANDBOX
  140. /* GUID of U-Boot host device on sandbox */
  141. extern const efi_guid_t efi_guid_host_dev;
  142. #endif
  143. /* GUID of the EFI_BLOCK_IO_PROTOCOL */
  144. extern const efi_guid_t efi_block_io_guid;
  145. extern const efi_guid_t efi_global_variable_guid;
  146. extern const efi_guid_t efi_guid_console_control;
  147. extern const efi_guid_t efi_guid_device_path;
  148. /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
  149. extern const efi_guid_t efi_guid_driver_binding_protocol;
  150. /* event group ExitBootServices() invoked */
  151. extern const efi_guid_t efi_guid_event_group_exit_boot_services;
  152. /* event group SetVirtualAddressMap() invoked */
  153. extern const efi_guid_t efi_guid_event_group_virtual_address_change;
  154. /* event group memory map changed */
  155. extern const efi_guid_t efi_guid_event_group_memory_map_change;
  156. /* event group boot manager about to boot */
  157. extern const efi_guid_t efi_guid_event_group_ready_to_boot;
  158. /* event group ResetSystem() invoked (before ExitBootServices) */
  159. extern const efi_guid_t efi_guid_event_group_reset_system;
  160. /* GUID of the device tree table */
  161. extern const efi_guid_t efi_guid_fdt;
  162. extern const efi_guid_t efi_guid_loaded_image;
  163. extern const efi_guid_t efi_guid_loaded_image_device_path;
  164. extern const efi_guid_t efi_guid_device_path_to_text_protocol;
  165. extern const efi_guid_t efi_simple_file_system_protocol_guid;
  166. extern const efi_guid_t efi_file_info_guid;
  167. /* GUID for file system information */
  168. extern const efi_guid_t efi_file_system_info_guid;
  169. extern const efi_guid_t efi_guid_device_path_utilities_protocol;
  170. /* GUID of the deprecated Unicode collation protocol */
  171. extern const efi_guid_t efi_guid_unicode_collation_protocol;
  172. /* GUID of the Unicode collation protocol */
  173. extern const efi_guid_t efi_guid_unicode_collation_protocol2;
  174. extern const efi_guid_t efi_guid_hii_config_routing_protocol;
  175. extern const efi_guid_t efi_guid_hii_config_access_protocol;
  176. extern const efi_guid_t efi_guid_hii_database_protocol;
  177. extern const efi_guid_t efi_guid_hii_string_protocol;
  178. /* GUIDs for authentication */
  179. extern const efi_guid_t efi_guid_image_security_database;
  180. extern const efi_guid_t efi_guid_sha256;
  181. extern const efi_guid_t efi_guid_cert_x509;
  182. extern const efi_guid_t efi_guid_cert_x509_sha256;
  183. extern const efi_guid_t efi_guid_cert_type_pkcs7;
  184. /* GUID of RNG protocol */
  185. extern const efi_guid_t efi_guid_rng_protocol;
  186. extern unsigned int __efi_runtime_start, __efi_runtime_stop;
  187. extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
  188. /**
  189. * struct efi_open_protocol_info_item - open protocol info item
  190. *
  191. * When a protocol is opened a open protocol info entry is created.
  192. * These are maintained in a list.
  193. *
  194. * @link: link to the list of open protocol info entries of a protocol
  195. * @info: information about the opening of a protocol
  196. */
  197. struct efi_open_protocol_info_item {
  198. struct list_head link;
  199. struct efi_open_protocol_info_entry info;
  200. };
  201. /**
  202. * struct efi_handler - single protocol interface of a handle
  203. *
  204. * When the UEFI payload wants to open a protocol on an object to get its
  205. * interface (usually a struct with callback functions), this struct maps the
  206. * protocol GUID to the respective protocol interface
  207. *
  208. * @link: link to the list of protocols of a handle
  209. * @guid: GUID of the protocol
  210. * @protocol_interface: protocol interface
  211. * @open_infos link to the list of open protocol info items
  212. */
  213. struct efi_handler {
  214. struct list_head link;
  215. const efi_guid_t *guid;
  216. void *protocol_interface;
  217. struct list_head open_infos;
  218. };
  219. /**
  220. * enum efi_object_type - type of EFI object
  221. *
  222. * In UnloadImage we must be able to identify if the handle relates to a
  223. * started image.
  224. */
  225. enum efi_object_type {
  226. EFI_OBJECT_TYPE_UNDEFINED = 0,
  227. EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
  228. EFI_OBJECT_TYPE_LOADED_IMAGE,
  229. EFI_OBJECT_TYPE_STARTED_IMAGE,
  230. };
  231. /**
  232. * struct efi_object - dereferenced EFI handle
  233. *
  234. * @link: pointers to put the handle into a linked list
  235. * @protocols: linked list with the protocol interfaces installed on this
  236. * handle
  237. *
  238. * UEFI offers a flexible and expandable object model. The objects in the UEFI
  239. * API are devices, drivers, and loaded images. struct efi_object is our storage
  240. * structure for these objects.
  241. *
  242. * When including this structure into a larger structure always put it first so
  243. * that when deleting a handle the whole encompassing structure can be freed.
  244. *
  245. * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
  246. * has been created for such pointers.
  247. */
  248. struct efi_object {
  249. /* Every UEFI object is part of a global object list */
  250. struct list_head link;
  251. /* The list of protocols */
  252. struct list_head protocols;
  253. enum efi_object_type type;
  254. };
  255. enum efi_image_auth_status {
  256. EFI_IMAGE_AUTH_FAILED = 0,
  257. EFI_IMAGE_AUTH_PASSED,
  258. };
  259. /**
  260. * struct efi_loaded_image_obj - handle of a loaded image
  261. *
  262. * @header: EFI object header
  263. * @exit_status: exit status passed to Exit()
  264. * @exit_data_size: exit data size passed to Exit()
  265. * @exit_data: exit data passed to Exit()
  266. * @exit_jmp: long jump buffer for returning from started image
  267. * @entry: entry address of the relocated image
  268. * @image_type: indicates if the image is an applicition or a driver
  269. * @auth_status: indicates if the image is authenticated
  270. */
  271. struct efi_loaded_image_obj {
  272. struct efi_object header;
  273. efi_status_t *exit_status;
  274. efi_uintn_t *exit_data_size;
  275. u16 **exit_data;
  276. struct jmp_buf_data *exit_jmp;
  277. EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
  278. struct efi_system_table *st);
  279. u16 image_type;
  280. enum efi_image_auth_status auth_status;
  281. };
  282. /**
  283. * struct efi_event
  284. *
  285. * @link: Link to list of all events
  286. * @queue_link: Link to the list of queued events
  287. * @type: Type of event, see efi_create_event
  288. * @notify_tpl: Task priority level of notifications
  289. * @nofify_function: Function to call when the event is triggered
  290. * @notify_context: Data to be passed to the notify function
  291. * @group: Event group
  292. * @trigger_time: Period of the timer
  293. * @trigger_next: Next time to trigger the timer
  294. * @trigger_type: Type of timer, see efi_set_timer
  295. * @is_signaled: The event occurred. The event is in the signaled state.
  296. */
  297. struct efi_event {
  298. struct list_head link;
  299. struct list_head queue_link;
  300. uint32_t type;
  301. efi_uintn_t notify_tpl;
  302. void (EFIAPI *notify_function)(struct efi_event *event, void *context);
  303. void *notify_context;
  304. const efi_guid_t *group;
  305. u64 trigger_next;
  306. u64 trigger_time;
  307. enum efi_timer_delay trigger_type;
  308. bool is_signaled;
  309. };
  310. /* This list contains all UEFI objects we know of */
  311. extern struct list_head efi_obj_list;
  312. /* List of all events */
  313. extern struct list_head efi_events;
  314. /**
  315. * struct efi_protocol_notification - handle for notified protocol
  316. *
  317. * When a protocol interface is installed for which an event was registered with
  318. * the RegisterProtocolNotify() service this structure is used to hold the
  319. * handle on which the protocol interface was installed.
  320. *
  321. * @link: link to list of all handles notified for this event
  322. * @handle: handle on which the notified protocol interface was installed
  323. */
  324. struct efi_protocol_notification {
  325. struct list_head link;
  326. efi_handle_t handle;
  327. };
  328. /**
  329. * efi_register_notify_event - event registered by RegisterProtocolNotify()
  330. *
  331. * The address of this structure serves as registration value.
  332. *
  333. * @link: link to list of all registered events
  334. * @event: registered event. The same event may registered for multiple
  335. * GUIDs.
  336. * @protocol: protocol for which the event is registered
  337. * @handles: linked list of all handles on which the notified protocol was
  338. * installed
  339. */
  340. struct efi_register_notify_event {
  341. struct list_head link;
  342. struct efi_event *event;
  343. efi_guid_t protocol;
  344. struct list_head handles;
  345. };
  346. /* List of all events registered by RegisterProtocolNotify() */
  347. extern struct list_head efi_register_notify_events;
  348. /* Initialize efi execution environment */
  349. efi_status_t efi_init_obj_list(void);
  350. /* Install device tree */
  351. efi_status_t efi_install_fdt(void *fdt);
  352. /* Run loaded UEFI image */
  353. efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
  354. /* Initialize variable services */
  355. efi_status_t efi_init_variables(void);
  356. /* Notify ExitBootServices() is called */
  357. void efi_variables_boot_exit_notify(void);
  358. /* Called by bootefi to initialize root node */
  359. efi_status_t efi_root_node_register(void);
  360. /* Called by bootefi to initialize runtime */
  361. efi_status_t efi_initialize_system_table(void);
  362. /* efi_runtime_detach() - detach unimplemented runtime functions */
  363. void efi_runtime_detach(void);
  364. /* efi_convert_pointer() - convert pointer to virtual address */
  365. efi_status_t EFIAPI efi_convert_pointer(efi_uintn_t debug_disposition,
  366. void **address);
  367. /* Called by bootefi to make console interface available */
  368. efi_status_t efi_console_register(void);
  369. /* Called by bootefi to make all disk storage accessible as EFI objects */
  370. efi_status_t efi_disk_register(void);
  371. /* Called by efi_init_obj_list() to install EFI_RNG_PROTOCOL */
  372. efi_status_t efi_rng_register(void);
  373. /* Called by efi_init_obj_list() to install EFI_TCG2_PROTOCOL */
  374. efi_status_t efi_tcg2_register(void);
  375. /* Create handles and protocols for the partitions of a block device */
  376. int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
  377. const char *if_typename, int diskid,
  378. const char *pdevname);
  379. /* Check if it is EFI system partition */
  380. bool efi_disk_is_system_part(efi_handle_t handle);
  381. /* Called by bootefi to make GOP (graphical) interface available */
  382. efi_status_t efi_gop_register(void);
  383. /* Called by bootefi to make the network interface available */
  384. efi_status_t efi_net_register(void);
  385. /* Called by bootefi to make the watchdog available */
  386. efi_status_t efi_watchdog_register(void);
  387. efi_status_t efi_initrd_register(void);
  388. /* Called by bootefi to make SMBIOS tables available */
  389. /**
  390. * efi_acpi_register() - write out ACPI tables
  391. *
  392. * Called by bootefi to make ACPI tables available
  393. *
  394. * @return 0 if OK, -ENOMEM if no memory is available for the tables
  395. */
  396. efi_status_t efi_acpi_register(void);
  397. /**
  398. * efi_smbios_register() - write out SMBIOS tables
  399. *
  400. * Called by bootefi to make SMBIOS tables available
  401. *
  402. * @return 0 if OK, -ENOMEM if no memory is available for the tables
  403. */
  404. efi_status_t efi_smbios_register(void);
  405. struct efi_simple_file_system_protocol *
  406. efi_fs_from_path(struct efi_device_path *fp);
  407. /* Called by networking code to memorize the dhcp ack package */
  408. void efi_net_set_dhcp_ack(void *pkt, int len);
  409. /* Called by efi_set_watchdog_timer to reset the timer */
  410. efi_status_t efi_set_watchdog(unsigned long timeout);
  411. /* Called from places to check whether a timer expired */
  412. void efi_timer_check(void);
  413. /* PE loader implementation */
  414. efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
  415. void *efi, size_t efi_size,
  416. struct efi_loaded_image *loaded_image_info);
  417. /* Called once to store the pristine gd pointer */
  418. void efi_save_gd(void);
  419. /* Special case handler for error/abort that just tries to dtrt to get
  420. * back to u-boot world */
  421. void efi_restore_gd(void);
  422. /* Call this to relocate the runtime section to an address space */
  423. void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
  424. /* Call this to set the current device name */
  425. void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
  426. /* Add a new object to the object list. */
  427. void efi_add_handle(efi_handle_t obj);
  428. /* Create handle */
  429. efi_status_t efi_create_handle(efi_handle_t *handle);
  430. /* Delete handle */
  431. void efi_delete_handle(efi_handle_t obj);
  432. /* Call this to validate a handle and find the EFI object for it */
  433. struct efi_object *efi_search_obj(const efi_handle_t handle);
  434. /* Load image */
  435. efi_status_t EFIAPI efi_load_image(bool boot_policy,
  436. efi_handle_t parent_image,
  437. struct efi_device_path *file_path,
  438. void *source_buffer,
  439. efi_uintn_t source_size,
  440. efi_handle_t *image_handle);
  441. /* Start image */
  442. efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
  443. efi_uintn_t *exit_data_size,
  444. u16 **exit_data);
  445. /* Unload image */
  446. efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
  447. /* Find a protocol on a handle */
  448. efi_status_t efi_search_protocol(const efi_handle_t handle,
  449. const efi_guid_t *protocol_guid,
  450. struct efi_handler **handler);
  451. /* Install new protocol on a handle */
  452. efi_status_t efi_add_protocol(const efi_handle_t handle,
  453. const efi_guid_t *protocol,
  454. void *protocol_interface);
  455. /* Delete protocol from a handle */
  456. efi_status_t efi_remove_protocol(const efi_handle_t handle,
  457. const efi_guid_t *protocol,
  458. void *protocol_interface);
  459. /* Delete all protocols from a handle */
  460. efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
  461. /* Install multiple protocol interfaces */
  462. efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
  463. (efi_handle_t *handle, ...);
  464. /* Get handles that support a given protocol */
  465. efi_status_t EFIAPI efi_locate_handle_buffer(
  466. enum efi_locate_search_type search_type,
  467. const efi_guid_t *protocol, void *search_key,
  468. efi_uintn_t *no_handles, efi_handle_t **buffer);
  469. /* Close an previously opened protocol interface */
  470. efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
  471. const efi_guid_t *protocol,
  472. efi_handle_t agent_handle,
  473. efi_handle_t controller_handle);
  474. /* Open a protocol interface */
  475. efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
  476. const efi_guid_t *protocol,
  477. void **protocol_interface);
  478. /* Call this to create an event */
  479. efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
  480. void (EFIAPI *notify_function) (
  481. struct efi_event *event,
  482. void *context),
  483. void *notify_context, efi_guid_t *group,
  484. struct efi_event **event);
  485. /* Call this to set a timer */
  486. efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
  487. uint64_t trigger_time);
  488. /* Call this to signal an event */
  489. void efi_signal_event(struct efi_event *event);
  490. /* open file system: */
  491. struct efi_simple_file_system_protocol *efi_simple_file_system(
  492. struct blk_desc *desc, int part, struct efi_device_path *dp);
  493. /* open file from device-path: */
  494. struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
  495. /**
  496. * efi_size_in_pages() - convert size in bytes to size in pages
  497. *
  498. * This macro returns the number of EFI memory pages required to hold 'size'
  499. * bytes.
  500. *
  501. * @size: size in bytes
  502. * Return: size in pages
  503. */
  504. #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
  505. /* Generic EFI memory allocator, call this to get memory */
  506. void *efi_alloc(uint64_t len, int memory_type);
  507. /* More specific EFI memory allocator, called by EFI payloads */
  508. efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
  509. uint64_t *memory);
  510. /* EFI memory free function. */
  511. efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
  512. /* EFI memory allocator for small allocations */
  513. efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
  514. void **buffer);
  515. /* EFI pool memory free function. */
  516. efi_status_t efi_free_pool(void *buffer);
  517. /* Returns the EFI memory map */
  518. efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
  519. struct efi_mem_desc *memory_map,
  520. efi_uintn_t *map_key,
  521. efi_uintn_t *descriptor_size,
  522. uint32_t *descriptor_version);
  523. /* Adds a range into the EFI memory map */
  524. efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type);
  525. /* Adds a conventional range into the EFI memory map */
  526. efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
  527. u64 ram_top);
  528. /* Called by board init to initialize the EFI drivers */
  529. efi_status_t efi_driver_init(void);
  530. /* Called by board init to initialize the EFI memory map */
  531. int efi_memory_init(void);
  532. /* Adds new or overrides configuration table entry to the system table */
  533. efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
  534. /* Sets up a loaded image */
  535. efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
  536. struct efi_device_path *file_path,
  537. struct efi_loaded_image_obj **handle_ptr,
  538. struct efi_loaded_image **info_ptr);
  539. /* Print information about all loaded images */
  540. void efi_print_image_infos(void *pc);
  541. #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
  542. extern void *efi_bounce_buffer;
  543. #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
  544. #endif
  545. struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
  546. int efi_dp_match(const struct efi_device_path *a,
  547. const struct efi_device_path *b);
  548. struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
  549. struct efi_device_path **rem);
  550. /* get size of the first device path instance excluding end node */
  551. efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
  552. /* size of multi-instance device path excluding end node */
  553. efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
  554. struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
  555. struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
  556. const struct efi_device_path *dp2);
  557. struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
  558. const struct efi_device_path *node);
  559. /* Create a device path node of given type, sub-type, length */
  560. struct efi_device_path *efi_dp_create_device_node(const u8 type,
  561. const u8 sub_type,
  562. const u16 length);
  563. /* Append device path instance */
  564. struct efi_device_path *efi_dp_append_instance(
  565. const struct efi_device_path *dp,
  566. const struct efi_device_path *dpi);
  567. /* Get next device path instance */
  568. struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
  569. efi_uintn_t *size);
  570. /* Check if a device path contains muliple instances */
  571. bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
  572. struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
  573. /* Create a device node for a block device partition. */
  574. struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
  575. struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
  576. const char *path);
  577. struct efi_device_path *efi_dp_from_eth(void);
  578. struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
  579. uint64_t start_address,
  580. uint64_t end_address);
  581. /* Determine the last device path node that is not the end node. */
  582. const struct efi_device_path *efi_dp_last_node(
  583. const struct efi_device_path *dp);
  584. efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
  585. struct efi_device_path **device_path,
  586. struct efi_device_path **file_path);
  587. efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
  588. const char *path,
  589. struct efi_device_path **device,
  590. struct efi_device_path **file);
  591. ssize_t efi_dp_check_length(const struct efi_device_path *dp,
  592. const size_t maxlen);
  593. #define EFI_DP_TYPE(_dp, _type, _subtype) \
  594. (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
  595. ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
  596. /*
  597. * Use these to indicate that your code / data should go into the EFI runtime
  598. * section and thus still be available when the OS is running
  599. */
  600. #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
  601. #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
  602. /* Indicate supported runtime services */
  603. efi_status_t efi_init_runtime_supported(void);
  604. /* Update CRC32 in table header */
  605. void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
  606. /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
  607. * to make it available at runtime */
  608. efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
  609. /* Boards may provide the functions below to implement RTS functionality */
  610. void __efi_runtime EFIAPI efi_reset_system(
  611. enum efi_reset_type reset_type,
  612. efi_status_t reset_status,
  613. unsigned long data_size, void *reset_data);
  614. /* Architecture specific initialization of the EFI subsystem */
  615. efi_status_t efi_reset_system_init(void);
  616. efi_status_t __efi_runtime EFIAPI efi_get_time(
  617. struct efi_time *time,
  618. struct efi_time_cap *capabilities);
  619. efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
  620. #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
  621. /*
  622. * Entry point for the tests of the EFI API.
  623. * It is called by 'bootefi selftest'
  624. */
  625. efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
  626. struct efi_system_table *systab);
  627. #endif
  628. efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
  629. const efi_guid_t *vendor, u32 *attributes,
  630. efi_uintn_t *data_size, void *data);
  631. efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
  632. u16 *variable_name,
  633. efi_guid_t *vendor);
  634. efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
  635. const efi_guid_t *vendor, u32 attributes,
  636. efi_uintn_t data_size, const void *data);
  637. efi_status_t EFIAPI efi_query_variable_info(
  638. u32 attributes, u64 *maximum_variable_storage_size,
  639. u64 *remaining_variable_storage_size,
  640. u64 *maximum_variable_size);
  641. /*
  642. * See section 3.1.3 in the v2.7 UEFI spec for more details on
  643. * the layout of EFI_LOAD_OPTION. In short it is:
  644. *
  645. * typedef struct _EFI_LOAD_OPTION {
  646. * UINT32 Attributes;
  647. * UINT16 FilePathListLength;
  648. * // CHAR16 Description[]; <-- variable length, NULL terminated
  649. * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
  650. * <-- FilePathListLength bytes
  651. * // UINT8 OptionalData[];
  652. * } EFI_LOAD_OPTION;
  653. */
  654. struct efi_load_option {
  655. u32 attributes;
  656. u16 file_path_length;
  657. u16 *label;
  658. struct efi_device_path *file_path;
  659. const u8 *optional_data;
  660. };
  661. efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
  662. efi_uintn_t *size);
  663. unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
  664. efi_status_t efi_set_load_options(efi_handle_t handle,
  665. efi_uintn_t load_options_size,
  666. void *load_options);
  667. efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options);
  668. /**
  669. * efi_image_regions - A list of memory regions
  670. *
  671. * @max: Maximum number of regions
  672. * @num: Number of regions
  673. * @reg: array of regions
  674. */
  675. struct efi_image_regions {
  676. int max;
  677. int num;
  678. struct image_region reg[];
  679. };
  680. /**
  681. * efi_sig_data - A decoded data of struct efi_signature_data
  682. *
  683. * This structure represents an internal form of signature in
  684. * signature database. A listed list may represent a signature list.
  685. *
  686. * @next: Pointer to next entry
  687. * @onwer: Signature owner
  688. * @data: Pointer to signature data
  689. * @size: Size of signature data
  690. */
  691. struct efi_sig_data {
  692. struct efi_sig_data *next;
  693. efi_guid_t owner;
  694. void *data;
  695. size_t size;
  696. };
  697. /**
  698. * efi_signature_store - A decoded data of signature database
  699. *
  700. * This structure represents an internal form of signature database.
  701. *
  702. * @next: Pointer to next entry
  703. * @sig_type: Signature type
  704. * @sig_data_list: Pointer to signature list
  705. */
  706. struct efi_signature_store {
  707. struct efi_signature_store *next;
  708. efi_guid_t sig_type;
  709. struct efi_sig_data *sig_data_list;
  710. };
  711. struct x509_certificate;
  712. struct pkcs7_message;
  713. bool efi_signature_lookup_digest(struct efi_image_regions *regs,
  714. struct efi_signature_store *db);
  715. bool efi_signature_verify(struct efi_image_regions *regs,
  716. struct pkcs7_message *msg,
  717. struct efi_signature_store *db,
  718. struct efi_signature_store *dbx);
  719. static inline bool efi_signature_verify_one(struct efi_image_regions *regs,
  720. struct pkcs7_message *msg,
  721. struct efi_signature_store *db)
  722. {
  723. return efi_signature_verify(regs, msg, db, NULL);
  724. }
  725. bool efi_signature_check_signers(struct pkcs7_message *msg,
  726. struct efi_signature_store *dbx);
  727. efi_status_t efi_image_region_add(struct efi_image_regions *regs,
  728. const void *start, const void *end,
  729. int nocheck);
  730. void efi_sigstore_free(struct efi_signature_store *sigstore);
  731. struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
  732. bool efi_secure_boot_enabled(void);
  733. bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
  734. WIN_CERTIFICATE **auth, size_t *auth_len);
  735. /* runtime implementation of memcpy() */
  736. void efi_memcpy_runtime(void *dest, const void *src, size_t n);
  737. /* commonly used helper function */
  738. u16 *efi_create_indexed_name(u16 *buffer, const char *name, unsigned int index);
  739. #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
  740. /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
  741. #define __efi_runtime_data
  742. #define __efi_runtime
  743. static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
  744. {
  745. return EFI_SUCCESS;
  746. }
  747. /* No loader configured, stub out EFI_ENTRY */
  748. static inline void efi_restore_gd(void) { }
  749. static inline void efi_set_bootdev(const char *dev, const char *devnr,
  750. const char *path) { }
  751. static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
  752. static inline void efi_print_image_infos(void *pc) { }
  753. #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
  754. #endif /* _EFI_LOADER_H */