efi_loader.h 31 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. /* GUIDs of the Load File and Load File2 protocol */
  173. extern const efi_guid_t efi_guid_load_file_protocol;
  174. extern const efi_guid_t efi_guid_load_file2_protocol;
  175. /* GUID of the Unicode collation protocol */
  176. extern const efi_guid_t efi_guid_unicode_collation_protocol2;
  177. extern const efi_guid_t efi_guid_hii_config_routing_protocol;
  178. extern const efi_guid_t efi_guid_hii_config_access_protocol;
  179. extern const efi_guid_t efi_guid_hii_database_protocol;
  180. extern const efi_guid_t efi_guid_hii_string_protocol;
  181. /* GUIDs for authentication */
  182. extern const efi_guid_t efi_guid_image_security_database;
  183. extern const efi_guid_t efi_guid_sha256;
  184. extern const efi_guid_t efi_guid_cert_x509;
  185. extern const efi_guid_t efi_guid_cert_x509_sha256;
  186. extern const efi_guid_t efi_guid_cert_type_pkcs7;
  187. /* GUID of RNG protocol */
  188. extern const efi_guid_t efi_guid_rng_protocol;
  189. /* GUID of capsule update result */
  190. extern const efi_guid_t efi_guid_capsule_report;
  191. /* GUID of firmware management protocol */
  192. extern const efi_guid_t efi_guid_firmware_management_protocol;
  193. extern unsigned int __efi_runtime_start, __efi_runtime_stop;
  194. extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
  195. /**
  196. * struct efi_open_protocol_info_item - open protocol info item
  197. *
  198. * When a protocol is opened a open protocol info entry is created.
  199. * These are maintained in a list.
  200. *
  201. * @link: link to the list of open protocol info entries of a protocol
  202. * @info: information about the opening of a protocol
  203. */
  204. struct efi_open_protocol_info_item {
  205. struct list_head link;
  206. struct efi_open_protocol_info_entry info;
  207. };
  208. /**
  209. * struct efi_handler - single protocol interface of a handle
  210. *
  211. * When the UEFI payload wants to open a protocol on an object to get its
  212. * interface (usually a struct with callback functions), this struct maps the
  213. * protocol GUID to the respective protocol interface
  214. *
  215. * @link: link to the list of protocols of a handle
  216. * @guid: GUID of the protocol
  217. * @protocol_interface: protocol interface
  218. * @open_infos link to the list of open protocol info items
  219. */
  220. struct efi_handler {
  221. struct list_head link;
  222. const efi_guid_t *guid;
  223. void *protocol_interface;
  224. struct list_head open_infos;
  225. };
  226. /**
  227. * enum efi_object_type - type of EFI object
  228. *
  229. * In UnloadImage we must be able to identify if the handle relates to a
  230. * started image.
  231. */
  232. enum efi_object_type {
  233. EFI_OBJECT_TYPE_UNDEFINED = 0,
  234. EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
  235. EFI_OBJECT_TYPE_LOADED_IMAGE,
  236. EFI_OBJECT_TYPE_STARTED_IMAGE,
  237. };
  238. /**
  239. * struct efi_object - dereferenced EFI handle
  240. *
  241. * @link: pointers to put the handle into a linked list
  242. * @protocols: linked list with the protocol interfaces installed on this
  243. * handle
  244. *
  245. * UEFI offers a flexible and expandable object model. The objects in the UEFI
  246. * API are devices, drivers, and loaded images. struct efi_object is our storage
  247. * structure for these objects.
  248. *
  249. * When including this structure into a larger structure always put it first so
  250. * that when deleting a handle the whole encompassing structure can be freed.
  251. *
  252. * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
  253. * has been created for such pointers.
  254. */
  255. struct efi_object {
  256. /* Every UEFI object is part of a global object list */
  257. struct list_head link;
  258. /* The list of protocols */
  259. struct list_head protocols;
  260. enum efi_object_type type;
  261. };
  262. enum efi_image_auth_status {
  263. EFI_IMAGE_AUTH_FAILED = 0,
  264. EFI_IMAGE_AUTH_PASSED,
  265. };
  266. /**
  267. * struct efi_loaded_image_obj - handle of a loaded image
  268. *
  269. * @header: EFI object header
  270. * @exit_status: exit status passed to Exit()
  271. * @exit_data_size: exit data size passed to Exit()
  272. * @exit_data: exit data passed to Exit()
  273. * @exit_jmp: long jump buffer for returning from started image
  274. * @entry: entry address of the relocated image
  275. * @image_type: indicates if the image is an applicition or a driver
  276. * @auth_status: indicates if the image is authenticated
  277. */
  278. struct efi_loaded_image_obj {
  279. struct efi_object header;
  280. efi_status_t *exit_status;
  281. efi_uintn_t *exit_data_size;
  282. u16 **exit_data;
  283. struct jmp_buf_data *exit_jmp;
  284. EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
  285. struct efi_system_table *st);
  286. u16 image_type;
  287. enum efi_image_auth_status auth_status;
  288. };
  289. /**
  290. * struct efi_event
  291. *
  292. * @link: Link to list of all events
  293. * @queue_link: Link to the list of queued events
  294. * @type: Type of event, see efi_create_event
  295. * @notify_tpl: Task priority level of notifications
  296. * @nofify_function: Function to call when the event is triggered
  297. * @notify_context: Data to be passed to the notify function
  298. * @group: Event group
  299. * @trigger_time: Period of the timer
  300. * @trigger_next: Next time to trigger the timer
  301. * @trigger_type: Type of timer, see efi_set_timer
  302. * @is_signaled: The event occurred. The event is in the signaled state.
  303. */
  304. struct efi_event {
  305. struct list_head link;
  306. struct list_head queue_link;
  307. uint32_t type;
  308. efi_uintn_t notify_tpl;
  309. void (EFIAPI *notify_function)(struct efi_event *event, void *context);
  310. void *notify_context;
  311. const efi_guid_t *group;
  312. u64 trigger_next;
  313. u64 trigger_time;
  314. enum efi_timer_delay trigger_type;
  315. bool is_signaled;
  316. };
  317. /* This list contains all UEFI objects we know of */
  318. extern struct list_head efi_obj_list;
  319. /* List of all events */
  320. extern struct list_head efi_events;
  321. /**
  322. * struct efi_protocol_notification - handle for notified protocol
  323. *
  324. * When a protocol interface is installed for which an event was registered with
  325. * the RegisterProtocolNotify() service this structure is used to hold the
  326. * handle on which the protocol interface was installed.
  327. *
  328. * @link: link to list of all handles notified for this event
  329. * @handle: handle on which the notified protocol interface was installed
  330. */
  331. struct efi_protocol_notification {
  332. struct list_head link;
  333. efi_handle_t handle;
  334. };
  335. /**
  336. * efi_register_notify_event - event registered by RegisterProtocolNotify()
  337. *
  338. * The address of this structure serves as registration value.
  339. *
  340. * @link: link to list of all registered events
  341. * @event: registered event. The same event may registered for multiple
  342. * GUIDs.
  343. * @protocol: protocol for which the event is registered
  344. * @handles: linked list of all handles on which the notified protocol was
  345. * installed
  346. */
  347. struct efi_register_notify_event {
  348. struct list_head link;
  349. struct efi_event *event;
  350. efi_guid_t protocol;
  351. struct list_head handles;
  352. };
  353. /* List of all events registered by RegisterProtocolNotify() */
  354. extern struct list_head efi_register_notify_events;
  355. /* Initialize efi execution environment */
  356. efi_status_t efi_init_obj_list(void);
  357. /* Install device tree */
  358. efi_status_t efi_install_fdt(void *fdt);
  359. /* Run loaded UEFI image */
  360. efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
  361. /* Initialize variable services */
  362. efi_status_t efi_init_variables(void);
  363. /* Notify ExitBootServices() is called */
  364. void efi_variables_boot_exit_notify(void);
  365. /* Called by bootefi to initialize root node */
  366. efi_status_t efi_root_node_register(void);
  367. /* Called by bootefi to initialize runtime */
  368. efi_status_t efi_initialize_system_table(void);
  369. /* efi_runtime_detach() - detach unimplemented runtime functions */
  370. void efi_runtime_detach(void);
  371. /* efi_convert_pointer() - convert pointer to virtual address */
  372. efi_status_t EFIAPI efi_convert_pointer(efi_uintn_t debug_disposition,
  373. void **address);
  374. /* Called by bootefi to make console interface available */
  375. efi_status_t efi_console_register(void);
  376. /* Called by bootefi to make all disk storage accessible as EFI objects */
  377. efi_status_t efi_disk_register(void);
  378. /* Called by efi_init_obj_list() to install EFI_RNG_PROTOCOL */
  379. efi_status_t efi_rng_register(void);
  380. /* Called by efi_init_obj_list() to install EFI_TCG2_PROTOCOL */
  381. efi_status_t efi_tcg2_register(void);
  382. /* Create handles and protocols for the partitions of a block device */
  383. int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
  384. const char *if_typename, int diskid,
  385. const char *pdevname);
  386. /* Check if it is EFI system partition */
  387. bool efi_disk_is_system_part(efi_handle_t handle);
  388. /* Called by bootefi to make GOP (graphical) interface available */
  389. efi_status_t efi_gop_register(void);
  390. /* Called by bootefi to make the network interface available */
  391. efi_status_t efi_net_register(void);
  392. /* Called by bootefi to make the watchdog available */
  393. efi_status_t efi_watchdog_register(void);
  394. efi_status_t efi_initrd_register(void);
  395. /* Called by bootefi to make SMBIOS tables available */
  396. /**
  397. * efi_acpi_register() - write out ACPI tables
  398. *
  399. * Called by bootefi to make ACPI tables available
  400. *
  401. * @return 0 if OK, -ENOMEM if no memory is available for the tables
  402. */
  403. efi_status_t efi_acpi_register(void);
  404. /**
  405. * efi_smbios_register() - write out SMBIOS tables
  406. *
  407. * Called by bootefi to make SMBIOS tables available
  408. *
  409. * @return 0 if OK, -ENOMEM if no memory is available for the tables
  410. */
  411. efi_status_t efi_smbios_register(void);
  412. struct efi_simple_file_system_protocol *
  413. efi_fs_from_path(struct efi_device_path *fp);
  414. /* Called by networking code to memorize the dhcp ack package */
  415. void efi_net_set_dhcp_ack(void *pkt, int len);
  416. /* Called by efi_set_watchdog_timer to reset the timer */
  417. efi_status_t efi_set_watchdog(unsigned long timeout);
  418. /* Called from places to check whether a timer expired */
  419. void efi_timer_check(void);
  420. /* PE loader implementation */
  421. efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
  422. void *efi, size_t efi_size,
  423. struct efi_loaded_image *loaded_image_info);
  424. /* Called once to store the pristine gd pointer */
  425. void efi_save_gd(void);
  426. /* Special case handler for error/abort that just tries to dtrt to get
  427. * back to u-boot world */
  428. void efi_restore_gd(void);
  429. /* Call this to relocate the runtime section to an address space */
  430. void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
  431. /* Call this to set the current device name */
  432. void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
  433. /* Add a new object to the object list. */
  434. void efi_add_handle(efi_handle_t obj);
  435. /* Create handle */
  436. efi_status_t efi_create_handle(efi_handle_t *handle);
  437. /* Delete handle */
  438. void efi_delete_handle(efi_handle_t obj);
  439. /* Call this to validate a handle and find the EFI object for it */
  440. struct efi_object *efi_search_obj(const efi_handle_t handle);
  441. /* Load image */
  442. efi_status_t EFIAPI efi_load_image(bool boot_policy,
  443. efi_handle_t parent_image,
  444. struct efi_device_path *file_path,
  445. void *source_buffer,
  446. efi_uintn_t source_size,
  447. efi_handle_t *image_handle);
  448. /* Start image */
  449. efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
  450. efi_uintn_t *exit_data_size,
  451. u16 **exit_data);
  452. /* Unload image */
  453. efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
  454. /* Find a protocol on a handle */
  455. efi_status_t efi_search_protocol(const efi_handle_t handle,
  456. const efi_guid_t *protocol_guid,
  457. struct efi_handler **handler);
  458. /* Install new protocol on a handle */
  459. efi_status_t efi_add_protocol(const efi_handle_t handle,
  460. const efi_guid_t *protocol,
  461. void *protocol_interface);
  462. /* Open protocol */
  463. efi_status_t efi_protocol_open(struct efi_handler *handler,
  464. void **protocol_interface, void *agent_handle,
  465. void *controller_handle, uint32_t attributes);
  466. /* Delete protocol from a handle */
  467. efi_status_t efi_remove_protocol(const efi_handle_t handle,
  468. const efi_guid_t *protocol,
  469. void *protocol_interface);
  470. /* Delete all protocols from a handle */
  471. efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
  472. /* Install multiple protocol interfaces */
  473. efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
  474. (efi_handle_t *handle, ...);
  475. /* Get handles that support a given protocol */
  476. efi_status_t EFIAPI efi_locate_handle_buffer(
  477. enum efi_locate_search_type search_type,
  478. const efi_guid_t *protocol, void *search_key,
  479. efi_uintn_t *no_handles, efi_handle_t **buffer);
  480. /* Close an previously opened protocol interface */
  481. efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
  482. const efi_guid_t *protocol,
  483. efi_handle_t agent_handle,
  484. efi_handle_t controller_handle);
  485. /* Open a protocol interface */
  486. efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
  487. const efi_guid_t *protocol,
  488. void **protocol_interface);
  489. /* Call this to create an event */
  490. efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
  491. void (EFIAPI *notify_function) (
  492. struct efi_event *event,
  493. void *context),
  494. void *notify_context, efi_guid_t *group,
  495. struct efi_event **event);
  496. /* Call this to set a timer */
  497. efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
  498. uint64_t trigger_time);
  499. /* Call this to signal an event */
  500. void efi_signal_event(struct efi_event *event);
  501. /* open file system: */
  502. struct efi_simple_file_system_protocol *efi_simple_file_system(
  503. struct blk_desc *desc, int part, struct efi_device_path *dp);
  504. /* open file from device-path: */
  505. struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
  506. /**
  507. * efi_size_in_pages() - convert size in bytes to size in pages
  508. *
  509. * This macro returns the number of EFI memory pages required to hold 'size'
  510. * bytes.
  511. *
  512. * @size: size in bytes
  513. * Return: size in pages
  514. */
  515. #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
  516. /* Generic EFI memory allocator, call this to get memory */
  517. void *efi_alloc(uint64_t len, int memory_type);
  518. /* More specific EFI memory allocator, called by EFI payloads */
  519. efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
  520. uint64_t *memory);
  521. /* EFI memory free function. */
  522. efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
  523. /* EFI memory allocator for small allocations */
  524. efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
  525. void **buffer);
  526. /* EFI pool memory free function. */
  527. efi_status_t efi_free_pool(void *buffer);
  528. /* Returns the EFI memory map */
  529. efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
  530. struct efi_mem_desc *memory_map,
  531. efi_uintn_t *map_key,
  532. efi_uintn_t *descriptor_size,
  533. uint32_t *descriptor_version);
  534. /* Adds a range into the EFI memory map */
  535. efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type);
  536. /* Adds a conventional range into the EFI memory map */
  537. efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
  538. u64 ram_top);
  539. /* Called by board init to initialize the EFI drivers */
  540. efi_status_t efi_driver_init(void);
  541. /* Called by board init to initialize the EFI memory map */
  542. int efi_memory_init(void);
  543. /* Adds new or overrides configuration table entry to the system table */
  544. efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
  545. /* Sets up a loaded image */
  546. efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
  547. struct efi_device_path *file_path,
  548. struct efi_loaded_image_obj **handle_ptr,
  549. struct efi_loaded_image **info_ptr);
  550. /* Print information about all loaded images */
  551. void efi_print_image_infos(void *pc);
  552. #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
  553. extern void *efi_bounce_buffer;
  554. #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
  555. #endif
  556. struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
  557. int efi_dp_match(const struct efi_device_path *a,
  558. const struct efi_device_path *b);
  559. struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
  560. struct efi_device_path **rem);
  561. /* get size of the first device path instance excluding end node */
  562. efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
  563. /* size of multi-instance device path excluding end node */
  564. efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
  565. struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
  566. struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
  567. const struct efi_device_path *dp2);
  568. struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
  569. const struct efi_device_path *node);
  570. /* Create a device path node of given type, sub-type, length */
  571. struct efi_device_path *efi_dp_create_device_node(const u8 type,
  572. const u8 sub_type,
  573. const u16 length);
  574. /* Append device path instance */
  575. struct efi_device_path *efi_dp_append_instance(
  576. const struct efi_device_path *dp,
  577. const struct efi_device_path *dpi);
  578. /* Get next device path instance */
  579. struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
  580. efi_uintn_t *size);
  581. /* Check if a device path contains muliple instances */
  582. bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
  583. struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
  584. /* Create a device node for a block device partition. */
  585. struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
  586. struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
  587. const char *path);
  588. struct efi_device_path *efi_dp_from_eth(void);
  589. struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
  590. uint64_t start_address,
  591. uint64_t end_address);
  592. /* Determine the last device path node that is not the end node. */
  593. const struct efi_device_path *efi_dp_last_node(
  594. const struct efi_device_path *dp);
  595. efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
  596. struct efi_device_path **device_path,
  597. struct efi_device_path **file_path);
  598. efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
  599. const char *path,
  600. struct efi_device_path **device,
  601. struct efi_device_path **file);
  602. ssize_t efi_dp_check_length(const struct efi_device_path *dp,
  603. const size_t maxlen);
  604. #define EFI_DP_TYPE(_dp, _type, _subtype) \
  605. (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
  606. ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
  607. /*
  608. * Use these to indicate that your code / data should go into the EFI runtime
  609. * section and thus still be available when the OS is running
  610. */
  611. #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
  612. #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
  613. /* Indicate supported runtime services */
  614. efi_status_t efi_init_runtime_supported(void);
  615. /* Update CRC32 in table header */
  616. void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
  617. /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
  618. * to make it available at runtime */
  619. efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
  620. /* Boards may provide the functions below to implement RTS functionality */
  621. void __efi_runtime EFIAPI efi_reset_system(
  622. enum efi_reset_type reset_type,
  623. efi_status_t reset_status,
  624. unsigned long data_size, void *reset_data);
  625. /* Architecture specific initialization of the EFI subsystem */
  626. efi_status_t efi_reset_system_init(void);
  627. efi_status_t __efi_runtime EFIAPI efi_get_time(
  628. struct efi_time *time,
  629. struct efi_time_cap *capabilities);
  630. efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
  631. #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
  632. /*
  633. * Entry point for the tests of the EFI API.
  634. * It is called by 'bootefi selftest'
  635. */
  636. efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
  637. struct efi_system_table *systab);
  638. #endif
  639. efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
  640. const efi_guid_t *vendor, u32 *attributes,
  641. efi_uintn_t *data_size, void *data);
  642. efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
  643. u16 *variable_name,
  644. efi_guid_t *vendor);
  645. efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
  646. const efi_guid_t *vendor, u32 attributes,
  647. efi_uintn_t data_size, const void *data);
  648. efi_status_t EFIAPI efi_query_variable_info(
  649. u32 attributes, u64 *maximum_variable_storage_size,
  650. u64 *remaining_variable_storage_size,
  651. u64 *maximum_variable_size);
  652. /*
  653. * See section 3.1.3 in the v2.7 UEFI spec for more details on
  654. * the layout of EFI_LOAD_OPTION. In short it is:
  655. *
  656. * typedef struct _EFI_LOAD_OPTION {
  657. * UINT32 Attributes;
  658. * UINT16 FilePathListLength;
  659. * // CHAR16 Description[]; <-- variable length, NULL terminated
  660. * // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
  661. * <-- FilePathListLength bytes
  662. * // UINT8 OptionalData[];
  663. * } EFI_LOAD_OPTION;
  664. */
  665. struct efi_load_option {
  666. u32 attributes;
  667. u16 file_path_length;
  668. u16 *label;
  669. struct efi_device_path *file_path;
  670. const u8 *optional_data;
  671. };
  672. efi_status_t efi_deserialize_load_option(struct efi_load_option *lo, u8 *data,
  673. efi_uintn_t *size);
  674. unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
  675. efi_status_t efi_set_load_options(efi_handle_t handle,
  676. efi_uintn_t load_options_size,
  677. void *load_options);
  678. efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options);
  679. /**
  680. * efi_image_regions - A list of memory regions
  681. *
  682. * @max: Maximum number of regions
  683. * @num: Number of regions
  684. * @reg: array of regions
  685. */
  686. struct efi_image_regions {
  687. int max;
  688. int num;
  689. struct image_region reg[];
  690. };
  691. /**
  692. * efi_sig_data - A decoded data of struct efi_signature_data
  693. *
  694. * This structure represents an internal form of signature in
  695. * signature database. A listed list may represent a signature list.
  696. *
  697. * @next: Pointer to next entry
  698. * @onwer: Signature owner
  699. * @data: Pointer to signature data
  700. * @size: Size of signature data
  701. */
  702. struct efi_sig_data {
  703. struct efi_sig_data *next;
  704. efi_guid_t owner;
  705. void *data;
  706. size_t size;
  707. };
  708. /**
  709. * efi_signature_store - A decoded data of signature database
  710. *
  711. * This structure represents an internal form of signature database.
  712. *
  713. * @next: Pointer to next entry
  714. * @sig_type: Signature type
  715. * @sig_data_list: Pointer to signature list
  716. */
  717. struct efi_signature_store {
  718. struct efi_signature_store *next;
  719. efi_guid_t sig_type;
  720. struct efi_sig_data *sig_data_list;
  721. };
  722. struct x509_certificate;
  723. struct pkcs7_message;
  724. bool efi_signature_lookup_digest(struct efi_image_regions *regs,
  725. struct efi_signature_store *db);
  726. bool efi_signature_verify(struct efi_image_regions *regs,
  727. struct pkcs7_message *msg,
  728. struct efi_signature_store *db,
  729. struct efi_signature_store *dbx);
  730. static inline bool efi_signature_verify_one(struct efi_image_regions *regs,
  731. struct pkcs7_message *msg,
  732. struct efi_signature_store *db)
  733. {
  734. return efi_signature_verify(regs, msg, db, NULL);
  735. }
  736. bool efi_signature_check_signers(struct pkcs7_message *msg,
  737. struct efi_signature_store *dbx);
  738. efi_status_t efi_image_region_add(struct efi_image_regions *regs,
  739. const void *start, const void *end,
  740. int nocheck);
  741. void efi_sigstore_free(struct efi_signature_store *sigstore);
  742. struct efi_signature_store *efi_build_signature_store(void *sig_list,
  743. efi_uintn_t size);
  744. struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
  745. bool efi_secure_boot_enabled(void);
  746. bool efi_capsule_auth_enabled(void);
  747. bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
  748. WIN_CERTIFICATE **auth, size_t *auth_len);
  749. struct pkcs7_message *efi_parse_pkcs7_header(const void *buf,
  750. size_t buflen,
  751. u8 **tmpbuf);
  752. /* runtime implementation of memcpy() */
  753. void efi_memcpy_runtime(void *dest, const void *src, size_t n);
  754. /* commonly used helper function */
  755. u16 *efi_create_indexed_name(u16 *buffer, size_t buffer_size, const char *name,
  756. unsigned int index);
  757. extern const struct efi_firmware_management_protocol efi_fmp_fit;
  758. extern const struct efi_firmware_management_protocol efi_fmp_raw;
  759. /* Capsule update */
  760. efi_status_t EFIAPI efi_update_capsule(
  761. struct efi_capsule_header **capsule_header_array,
  762. efi_uintn_t capsule_count,
  763. u64 scatter_gather_list);
  764. efi_status_t EFIAPI efi_query_capsule_caps(
  765. struct efi_capsule_header **capsule_header_array,
  766. efi_uintn_t capsule_count,
  767. u64 *maximum_capsule_size,
  768. u32 *reset_type);
  769. efi_status_t efi_capsule_authenticate(const void *capsule,
  770. efi_uintn_t capsule_size,
  771. void **image, efi_uintn_t *image_size);
  772. #define EFI_CAPSULE_DIR L"\\EFI\\UpdateCapsule\\"
  773. /* Hook at initialization */
  774. efi_status_t efi_launch_capsules(void);
  775. #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
  776. /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
  777. #define __efi_runtime_data
  778. #define __efi_runtime
  779. static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
  780. {
  781. return EFI_SUCCESS;
  782. }
  783. /* No loader configured, stub out EFI_ENTRY */
  784. static inline void efi_restore_gd(void) { }
  785. static inline void efi_set_bootdev(const char *dev, const char *devnr,
  786. const char *path) { }
  787. static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
  788. static inline void efi_print_image_infos(void *pc) { }
  789. static inline efi_status_t efi_launch_capsules(void)
  790. {
  791. return EFI_SUCCESS;
  792. }
  793. #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
  794. #endif /* _EFI_LOADER_H */