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