include/efi_loader.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  *  EFI application loader
   4  *
   5  *  Copyright (c) 2016 Alexander Graf
   6  */
   7
   8 #ifndef _EFI_LOADER_H
   9 #define _EFI_LOADER_H 1
  10
  11 #include <common.h>
  12 #include <part_efi.h>
  13 #include <efi_api.h>
  14 #include <image.h>
  15 #include <pe.h>
  16
  17 static inline int guidcmp(const void *g1, const void *g2)
  18 {
  19         return memcmp(g1, g2, sizeof(efi_guid_t));
  20 }
  21
  22 static inline void *guidcpy(void *dst, const void *src)
  23 {
  24         return memcpy(dst, src, sizeof(efi_guid_t));
  25 }
  26
  27 /* No need for efi loader support in SPL */
  28 #if CONFIG_IS_ENABLED(EFI_LOADER)
  29
  30 #include <linux/list.h>
  31 #include <linux/oid_registry.h>
  32
  33 /* Maximum number of configuration tables */
  34 #define EFI_MAX_CONFIGURATION_TABLES 16
  35
  36 /* GUID used by the root node */
  37 #define U_BOOT_GUID \
  38         EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
  39                  0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
  40 /* GUID used as host device on sandbox */
  41 #define U_BOOT_HOST_DEV_GUID \
  42         EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \
  43                  0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82)
  44
  45 /* Use internal device tree when starting UEFI application */
  46 #define EFI_FDT_USE_INTERNAL NULL
  47
  48 /* Root node */
  49 extern efi_handle_t efi_root;
  50
  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
  58 int __efi_entry_check(void);
  59 int __efi_exit_check(void);
  60 const char *__efi_nesting(void);
  61 const char *__efi_nesting_inc(void);
  62 const char *__efi_nesting_dec(void);
  63
  64 /*
  65  * Enter the u-boot world from UEFI:
  66  */
  67 #define EFI_ENTRY(format, ...) do { \
  68         assert(__efi_entry_check()); \
  69         debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
  70                 __func__, ##__VA_ARGS__); \
  71         } while(0)
  72
  73 /*
  74  * Exit the u-boot world back to UEFI:
  75  */
  76 #define EFI_EXIT(ret) ({ \
  77         typeof(ret) _r = ret; \
  78         debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
  79                 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
  80         assert(__efi_exit_check()); \
  81         _r; \
  82         })
  83
  84 /*
  85  * Call non-void UEFI function from u-boot and retrieve return value:
  86  */
  87 #define EFI_CALL(exp) ({ \
  88         debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
  89         assert(__efi_exit_check()); \
  90         typeof(exp) _r = exp; \
  91         assert(__efi_entry_check()); \
  92         debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
  93               (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
  94         _r; \
  95 })
  96
  97 /*
  98  * Call void UEFI function from u-boot:
  99  */
 100 #define EFI_CALL_VOID(exp) do { \
 101         debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
 102         assert(__efi_exit_check()); \
 103         exp; \
 104         assert(__efi_entry_check()); \
 105         debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
 106         } while(0)
 107
 108 /*
 109  * Write an indented message with EFI prefix
 110  */
 111 #define EFI_PRINT(format, ...) ({ \
 112         debug("%sEFI: " format, __efi_nesting(), \
 113                 ##__VA_ARGS__); \
 114         })
 115
 116 #ifdef CONFIG_SYS_CACHELINE_SIZE
 117 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
 118 #else
 119 /* Just use the greatest cache flush alignment requirement I'm aware of */
 120 #define EFI_CACHELINE_SIZE 128
 121 #endif
 122
 123 /* Key identifying current memory map */
 124 extern efi_uintn_t efi_memory_map_key;
 125
 126 extern struct efi_runtime_services efi_runtime_services;
 127 extern struct efi_system_table systab;
 128
 129 extern struct efi_simple_text_output_protocol efi_con_out;
 130 extern struct efi_simple_text_input_protocol efi_con_in;
 131 extern struct efi_console_control_protocol efi_console_control;
 132 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
 133 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
 134 extern const struct efi_device_path_utilities_protocol
 135                                         efi_device_path_utilities;
 136 /* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */
 137 extern const struct efi_unicode_collation_protocol
 138                                         efi_unicode_collation_protocol;
 139 /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */
 140 extern const struct efi_unicode_collation_protocol
 141                                         efi_unicode_collation_protocol2;
 142 extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
 143 extern const struct efi_hii_config_access_protocol efi_hii_config_access;
 144 extern const struct efi_hii_database_protocol efi_hii_database;
 145 extern const struct efi_hii_string_protocol efi_hii_string;
 146 extern const struct efi_rng_protocol efi_rng_protocol;
 147
 148 uint16_t *efi_dp_str(struct efi_device_path *dp);
 149
 150 /* GUID of the U-Boot root node */
 151 extern const efi_guid_t efi_u_boot_guid;
 152 #ifdef CONFIG_SANDBOX
 153 /* GUID of U-Boot host device on sandbox */
 154 extern const efi_guid_t efi_guid_host_dev;
 155 #endif
 156 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
 157 extern const efi_guid_t efi_block_io_guid;
 158 extern const efi_guid_t efi_global_variable_guid;
 159 extern const efi_guid_t efi_guid_console_control;
 160 extern const efi_guid_t efi_guid_device_path;
 161 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
 162 extern const efi_guid_t efi_guid_driver_binding_protocol;
 163 /* event group ExitBootServices() invoked */
 164 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
 165 /* event group SetVirtualAddressMap() invoked */
 166 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
 167 /* event group memory map changed */
 168 extern const efi_guid_t efi_guid_event_group_memory_map_change;
 169 /* event group boot manager about to boot */
 170 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
 171 /* event group ResetSystem() invoked (before ExitBootServices) */
 172 extern const efi_guid_t efi_guid_event_group_reset_system;
 173 /* GUID of the device tree table */
 174 extern const efi_guid_t efi_guid_fdt;
 175 extern const efi_guid_t efi_guid_loaded_image;
 176 extern const efi_guid_t efi_guid_loaded_image_device_path;
 177 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
 178 extern const efi_guid_t efi_simple_file_system_protocol_guid;
 179 extern const efi_guid_t efi_file_info_guid;
 180 /* GUID for file system information */
 181 extern const efi_guid_t efi_file_system_info_guid;
 182 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
 183 /* GUID of the deprecated Unicode collation protocol */
 184 extern const efi_guid_t efi_guid_unicode_collation_protocol;
 185 /* GUID of the Unicode collation protocol */
 186 extern const efi_guid_t efi_guid_unicode_collation_protocol2;
 187 extern const efi_guid_t efi_guid_hii_config_routing_protocol;
 188 extern const efi_guid_t efi_guid_hii_config_access_protocol;
 189 extern const efi_guid_t efi_guid_hii_database_protocol;
 190 extern const efi_guid_t efi_guid_hii_string_protocol;
 191 /* GUIDs for authentication */
 192 extern const efi_guid_t efi_guid_image_security_database;
 193 extern const efi_guid_t efi_guid_sha256;
 194 extern const efi_guid_t efi_guid_cert_x509;
 195 extern const efi_guid_t efi_guid_cert_x509_sha256;
 196 extern const efi_guid_t efi_guid_cert_type_pkcs7;
 197
 198 /* GUID of RNG protocol */
 199 extern const efi_guid_t efi_guid_rng_protocol;
 200
 201 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
 202 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
 203
 204 /**
 205  * struct efi_open_protocol_info_item - open protocol info item
 206  *
 207  * When a protocol is opened a open protocol info entry is created.
 208  * These are maintained in a list.
 209  *
 210  * @link:       link to the list of open protocol info entries of a protocol
 211  * @info:       information about the opening of a protocol
 212  */
 213 struct efi_open_protocol_info_item {
 214         struct list_head link;
 215         struct efi_open_protocol_info_entry info;
 216 };
 217
 218 /**
 219  * struct efi_handler - single protocol interface of a handle
 220  *
 221  * When the UEFI payload wants to open a protocol on an object to get its
 222  * interface (usually a struct with callback functions), this struct maps the
 223  * protocol GUID to the respective protocol interface
 224  *
 225  * @link:               link to the list of protocols of a handle
 226  * @guid:               GUID of the protocol
 227  * @protocol_interface: protocol interface
 228  * @open_infos          link to the list of open protocol info items
 229  */
 230 struct efi_handler {
 231         struct list_head link;
 232         const efi_guid_t *guid;
 233         void *protocol_interface;
 234         struct list_head open_infos;
 235 };
 236
 237 /**
 238  * enum efi_object_type - type of EFI object
 239  *
 240  * In UnloadImage we must be able to identify if the handle relates to a
 241  * started image.
 242  */
 243 enum efi_object_type {
 244         EFI_OBJECT_TYPE_UNDEFINED = 0,
 245         EFI_OBJECT_TYPE_U_BOOT_FIRMWARE,
 246         EFI_OBJECT_TYPE_LOADED_IMAGE,
 247         EFI_OBJECT_TYPE_STARTED_IMAGE,
 248 };
 249
 250 /**
 251  * struct efi_object - dereferenced EFI handle
 252  *
 253  * @link:       pointers to put the handle into a linked list
 254  * @protocols:  linked list with the protocol interfaces installed on this
 255  *              handle
 256  *
 257  * UEFI offers a flexible and expandable object model. The objects in the UEFI
 258  * API are devices, drivers, and loaded images. struct efi_object is our storage
 259  * structure for these objects.
 260  *
 261  * When including this structure into a larger structure always put it first so
 262  * that when deleting a handle the whole encompassing structure can be freed.
 263  *
 264  * A pointer to this structure is referred to as a handle. Typedef efi_handle_t
 265  * has been created for such pointers.
 266  */
 267 struct efi_object {
 268         /* Every UEFI object is part of a global object list */
 269         struct list_head link;
 270         /* The list of protocols */
 271         struct list_head protocols;
 272         enum efi_object_type type;
 273 };
 274
 275 enum efi_image_auth_status {
 276         EFI_IMAGE_AUTH_FAILED = 0,
 277         EFI_IMAGE_AUTH_PASSED,
 278 };
 279
 280 /**
 281  * struct efi_loaded_image_obj - handle of a loaded image
 282  *
 283  * @header:             EFI object header
 284  * @exit_status:        exit status passed to Exit()
 285  * @exit_data_size:     exit data size passed to Exit()
 286  * @exit_data:          exit data passed to Exit()
 287  * @exit_jmp:           long jump buffer for returning form started image
 288  * @entry:              entry address of the relocated image
 289  */
 290 struct efi_loaded_image_obj {
 291         struct efi_object header;
 292         efi_status_t exit_status;
 293         efi_uintn_t *exit_data_size;
 294         u16 **exit_data;
 295         struct jmp_buf_data exit_jmp;
 296         EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
 297                                      struct efi_system_table *st);
 298         u16 image_type;
 299         enum efi_image_auth_status auth_status;
 300 };
 301
 302 /**
 303  * struct efi_event
 304  *
 305  * @link:               Link to list of all events
 306  * @queue_link:         Link to the list of queued events
 307  * @type:               Type of event, see efi_create_event
 308  * @notify_tpl:         Task priority level of notifications
 309  * @nofify_function:    Function to call when the event is triggered
 310  * @notify_context:     Data to be passed to the notify function
 311  * @group:              Event group
 312  * @trigger_time:       Period of the timer
 313  * @trigger_next:       Next time to trigger the timer
 314  * @trigger_type:       Type of timer, see efi_set_timer
 315  * @is_signaled:        The event occurred. The event is in the signaled state.
 316  */
 317 struct efi_event {
 318         struct list_head link;
 319         struct list_head queue_link;
 320         uint32_t type;
 321         efi_uintn_t notify_tpl;
 322         void (EFIAPI *notify_function)(struct efi_event *event, void *context);
 323         void *notify_context;
 324         const efi_guid_t *group;
 325         u64 trigger_next;
 326         u64 trigger_time;
 327         enum efi_timer_delay trigger_type;
 328         bool is_signaled;
 329 };
 330
 331 /* This list contains all UEFI objects we know of */
 332 extern struct list_head efi_obj_list;
 333 /* List of all events */
 334 extern struct list_head efi_events;
 335
 336 /**
 337  * struct efi_protocol_notification - handle for notified protocol
 338  *
 339  * When a protocol interface is installed for which an event was registered with
 340  * the RegisterProtocolNotify() service this structure is used to hold the
 341  * handle on which the protocol interface was installed.
 342  *
 343  * @link:       link to list of all handles notified for this event
 344  * @handle:     handle on which the notified protocol interface was installed
 345  */
 346 struct efi_protocol_notification {
 347         struct list_head link;
 348         efi_handle_t handle;
 349 };
 350
 351 /**
 352  * efi_register_notify_event - event registered by RegisterProtocolNotify()
 353  *
 354  * The address of this structure serves as registration value.
 355  *
 356  * @link:       link to list of all registered events
 357  * @event:      registered event. The same event may registered for multiple
 358  *              GUIDs.
 359  * @protocol:   protocol for which the event is registered
 360  * @handles:    linked list of all handles on which the notified protocol was
 361  *              installed
 362  */
 363 struct efi_register_notify_event {
 364         struct list_head link;
 365         struct efi_event *event;
 366         efi_guid_t protocol;
 367         struct list_head handles;
 368 };
 369
 370 /* List of all events registered by RegisterProtocolNotify() */
 371 extern struct list_head efi_register_notify_events;
 372
 373 /* Initialize efi execution environment */
 374 efi_status_t efi_init_obj_list(void);
 375 /* Install device tree */
 376 efi_status_t efi_install_fdt(void *fdt);
 377 /* Run loaded UEFI image */
 378 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size);
 379 /* Initialize variable services */
 380 efi_status_t efi_init_variables(void);
 381 /* Notify ExitBootServices() is called */
 382 void efi_variables_boot_exit_notify(void);
 383 /* Called by bootefi to initialize root node */
 384 efi_status_t efi_root_node_register(void);
 385 /* Called by bootefi to initialize runtime */
 386 efi_status_t efi_initialize_system_table(void);
 387 /* efi_runtime_detach() - detach unimplemented runtime functions */
 388 void efi_runtime_detach(void);
 389 /* Called by bootefi to make console interface available */
 390 efi_status_t efi_console_register(void);
 391 /* Called by bootefi to make all disk storage accessible as EFI objects */
 392 efi_status_t efi_disk_register(void);
 393 /* Create handles and protocols for the partitions of a block device */
 394 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
 395                                const char *if_typename, int diskid,
 396                                const char *pdevname);
 397 /* Check if it is EFI system partition */
 398 bool efi_disk_is_system_part(efi_handle_t handle);
 399 /* Called by bootefi to make GOP (graphical) interface available */
 400 efi_status_t efi_gop_register(void);
 401 /* Called by bootefi to make the network interface available */
 402 efi_status_t efi_net_register(void);
 403 /* Called by bootefi to make the watchdog available */
 404 efi_status_t efi_watchdog_register(void);
 405 efi_status_t efi_initrd_register(void);
 406 /* Called by bootefi to make SMBIOS tables available */
 407 /**
 408  * efi_acpi_register() - write out ACPI tables
 409  *
 410  * Called by bootefi to make ACPI tables available
 411  *
 412  * @return 0 if OK, -ENOMEM if no memory is available for the tables
 413  */
 414 efi_status_t efi_acpi_register(void);
 415 /**
 416  * efi_smbios_register() - write out SMBIOS tables
 417  *
 418  * Called by bootefi to make SMBIOS tables available
 419  *
 420  * @return 0 if OK, -ENOMEM if no memory is available for the tables
 421  */
 422 efi_status_t efi_smbios_register(void);
 423
 424 struct efi_simple_file_system_protocol *
 425 efi_fs_from_path(struct efi_device_path *fp);
 426
 427 /* Called by networking code to memorize the dhcp ack package */
 428 void efi_net_set_dhcp_ack(void *pkt, int len);
 429 /* Called by efi_set_watchdog_timer to reset the timer */
 430 efi_status_t efi_set_watchdog(unsigned long timeout);
 431
 432 /* Called from places to check whether a timer expired */
 433 void efi_timer_check(void);
 434 /* PE loader implementation */
 435 efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle,
 436                          void *efi, size_t efi_size,
 437                          struct efi_loaded_image *loaded_image_info);
 438 /* Called once to store the pristine gd pointer */
 439 void efi_save_gd(void);
 440 /* Special case handler for error/abort that just tries to dtrt to get
 441  * back to u-boot world */
 442 void efi_restore_gd(void);
 443 /* Call this to relocate the runtime section to an address space */
 444 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
 445 /* Call this to set the current device name */
 446 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
 447 /* Add a new object to the object list. */
 448 void efi_add_handle(efi_handle_t obj);
 449 /* Create handle */
 450 efi_status_t efi_create_handle(efi_handle_t *handle);
 451 /* Delete handle */
 452 void efi_delete_handle(efi_handle_t obj);
 453 /* Call this to validate a handle and find the EFI object for it */
 454 struct efi_object *efi_search_obj(const efi_handle_t handle);
 455 /* Load image */
 456 efi_status_t EFIAPI efi_load_image(bool boot_policy,
 457                                    efi_handle_t parent_image,
 458                                    struct efi_device_path *file_path,
 459                                    void *source_buffer,
 460                                    efi_uintn_t source_size,
 461                                    efi_handle_t *image_handle);
 462 /* Start image */
 463 efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
 464                                     efi_uintn_t *exit_data_size,
 465                                     u16 **exit_data);
 466 /* Unload image */
 467 efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle);
 468 /* Find a protocol on a handle */
 469 efi_status_t efi_search_protocol(const efi_handle_t handle,
 470                                  const efi_guid_t *protocol_guid,
 471                                  struct efi_handler **handler);
 472 /* Install new protocol on a handle */
 473 efi_status_t efi_add_protocol(const efi_handle_t handle,
 474                               const efi_guid_t *protocol,
 475                               void *protocol_interface);
 476 /* Delete protocol from a handle */
 477 efi_status_t efi_remove_protocol(const efi_handle_t handle,
 478                                  const efi_guid_t *protocol,
 479                                  void *protocol_interface);
 480 /* Delete all protocols from a handle */
 481 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
 482 /* Install multiple protocol interfaces */
 483 efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
 484                                 (efi_handle_t *handle, ...);
 485 /* Get handles that support a given protocol */
 486 efi_status_t EFIAPI efi_locate_handle_buffer(
 487                         enum efi_locate_search_type search_type,
 488                         const efi_guid_t *protocol, void *search_key,
 489                         efi_uintn_t *no_handles, efi_handle_t **buffer);
 490 /* Close an previously opened protocol interface */
 491 efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
 492                                        const efi_guid_t *protocol,
 493                                        efi_handle_t agent_handle,
 494                                        efi_handle_t controller_handle);
 495 /* Open a protocol interface */
 496 efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
 497                                         const efi_guid_t *protocol,
 498                                         void **protocol_interface);
 499 /* Call this to create an event */
 500 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
 501                               void (EFIAPI *notify_function) (
 502                                         struct efi_event *event,
 503                                         void *context),
 504                               void *notify_context, efi_guid_t *group,
 505                               struct efi_event **event);
 506 /* Call this to set a timer */
 507 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
 508                            uint64_t trigger_time);
 509 /* Call this to signal an event */
 510 void efi_signal_event(struct efi_event *event);
 511
 512 /* open file system: */
 513 struct efi_simple_file_system_protocol *efi_simple_file_system(
 514                 struct blk_desc *desc, int part, struct efi_device_path *dp);
 515
 516 /* open file from device-path: */
 517 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
 518
 519 /**
 520  * efi_size_in_pages() - convert size in bytes to size in pages
 521  *
 522  * This macro returns the number of EFI memory pages required to hold 'size'
 523  * bytes.
 524  *
 525  * @size:       size in bytes
 526  * Return:      size in pages
 527  */
 528 #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
 529 /* Generic EFI memory allocator, call this to get memory */
 530 void *efi_alloc(uint64_t len, int memory_type);
 531 /* More specific EFI memory allocator, called by EFI payloads */
 532 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
 533                                 uint64_t *memory);
 534 /* EFI memory free function. */
 535 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
 536 /* EFI memory allocator for small allocations */
 537 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
 538                                void **buffer);
 539 /* EFI pool memory free function. */
 540 efi_status_t efi_free_pool(void *buffer);
 541 /* Returns the EFI memory map */
 542 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
 543                                 struct efi_mem_desc *memory_map,
 544                                 efi_uintn_t *map_key,
 545                                 efi_uintn_t *descriptor_size,
 546                                 uint32_t *descriptor_version);
 547 /* Adds a range into the EFI memory map */
 548 efi_status_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
 549                                 bool overlap_only_ram);
 550 /* Adds a conventional range into the EFI memory map */
 551 efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
 552                                              u64 ram_top);
 553
 554 /* Called by board init to initialize the EFI drivers */
 555 efi_status_t efi_driver_init(void);
 556 /* Called by board init to initialize the EFI memory map */
 557 int efi_memory_init(void);
 558 /* Adds new or overrides configuration table entry to the system table */
 559 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
 560 /* Sets up a loaded image */
 561 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
 562                                     struct efi_device_path *file_path,
 563                                     struct efi_loaded_image_obj **handle_ptr,
 564                                     struct efi_loaded_image **info_ptr);
 565 /* Print information about all loaded images */
 566 void efi_print_image_infos(void *pc);
 567
 568 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
 569 extern void *efi_bounce_buffer;
 570 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
 571 #endif
 572
 573
 574 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
 575 int efi_dp_match(const struct efi_device_path *a,
 576                  const struct efi_device_path *b);
 577 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
 578                                    struct efi_device_path **rem);
 579 /* get size of the first device path instance excluding end node */
 580 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
 581 /* size of multi-instance device path excluding end node */
 582 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
 583 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
 584 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
 585                                       const struct efi_device_path *dp2);
 586 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
 587                                            const struct efi_device_path *node);
 588 /* Create a device path node of given type, sub-type, length */
 589 struct efi_device_path *efi_dp_create_device_node(const u8 type,
 590                                                   const u8 sub_type,
 591                                                   const u16 length);
 592 /* Append device path instance */
 593 struct efi_device_path *efi_dp_append_instance(
 594                 const struct efi_device_path *dp,
 595                 const struct efi_device_path *dpi);
 596 /* Get next device path instance */
 597 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
 598                                                  efi_uintn_t *size);
 599 /* Check if a device path contains muliple instances */
 600 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
 601
 602 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
 603 /* Create a device node for a block device partition. */
 604 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
 605 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
 606                                          const char *path);
 607 struct efi_device_path *efi_dp_from_eth(void);
 608 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
 609                                         uint64_t start_address,
 610                                         uint64_t end_address);
 611 /* Determine the last device path node that is not the end node. */
 612 const struct efi_device_path *efi_dp_last_node(
 613                         const struct efi_device_path *dp);
 614 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
 615                                     struct efi_device_path **device_path,
 616                                     struct efi_device_path **file_path);
 617 efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
 618                               const char *path,
 619                               struct efi_device_path **device,
 620                               struct efi_device_path **file);
 621
 622 #define EFI_DP_TYPE(_dp, _type, _subtype) \
 623         (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
 624          ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
 625
 626 /*
 627  * Use these to indicate that your code / data should go into the EFI runtime
 628  * section and thus still be available when the OS is running
 629  */
 630 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
 631 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
 632
 633 /* Indicate supported runtime services */
 634 efi_status_t efi_init_runtime_supported(void);
 635
 636 /* Update CRC32 in table header */
 637 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
 638
 639 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
 640  * to make it available at runtime */
 641 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
 642
 643 /* Boards may provide the functions below to implement RTS functionality */
 644
 645 void __efi_runtime EFIAPI efi_reset_system(
 646                         enum efi_reset_type reset_type,
 647                         efi_status_t reset_status,
 648                         unsigned long data_size, void *reset_data);
 649
 650 /* Architecture specific initialization of the EFI subsystem */
 651 efi_status_t efi_reset_system_init(void);
 652
 653 efi_status_t __efi_runtime EFIAPI efi_get_time(
 654                         struct efi_time *time,
 655                         struct efi_time_cap *capabilities);
 656
 657 efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time);
 658
 659 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
 660 /*
 661  * Entry point for the tests of the EFI API.
 662  * It is called by 'bootefi selftest'
 663  */
 664 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
 665                                  struct efi_system_table *systab);
 666 #endif
 667
 668 efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
 669                                      const efi_guid_t *vendor, u32 *attributes,
 670                                      efi_uintn_t *data_size, void *data);
 671 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
 672                                                u16 *variable_name,
 673                                                efi_guid_t *vendor);
 674 efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
 675                                      const efi_guid_t *vendor, u32 attributes,
 676                                      efi_uintn_t data_size, const void *data);
 677
 678 efi_status_t EFIAPI efi_query_variable_info(
 679                         u32 attributes, u64 *maximum_variable_storage_size,
 680                         u64 *remaining_variable_storage_size,
 681                         u64 *maximum_variable_size);
 682
 683 /*
 684  * See section 3.1.3 in the v2.7 UEFI spec for more details on
 685  * the layout of EFI_LOAD_OPTION.  In short it is:
 686  *
 687  *    typedef struct _EFI_LOAD_OPTION {
 688  *        UINT32 Attributes;
 689  *        UINT16 FilePathListLength;
 690  *        // CHAR16 Description[];   <-- variable length, NULL terminated
 691  *        // EFI_DEVICE_PATH_PROTOCOL FilePathList[];
 692  *                                               <-- FilePathListLength bytes
 693  *        // UINT8 OptionalData[];
 694  *    } EFI_LOAD_OPTION;
 695  */
 696 struct efi_load_option {
 697         u32 attributes;
 698         u16 file_path_length;
 699         u16 *label;
 700         struct efi_device_path *file_path;
 701         const u8 *optional_data;
 702 };
 703
 704 void efi_deserialize_load_option(struct efi_load_option *lo, u8 *data);
 705 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data);
 706 efi_status_t efi_bootmgr_load(efi_handle_t *handle);
 707
 708 /**
 709  * efi_image_regions - A list of memory regions
 710  *
 711  * @max:        Maximum number of regions
 712  * @num:        Number of regions
 713  * @reg:        array of regions
 714  */
 715 struct efi_image_regions {
 716         int                     max;
 717         int                     num;
 718         struct image_region     reg[];
 719 };
 720
 721 /**
 722  * efi_sig_data - A decoded data of struct efi_signature_data
 723  *
 724  * This structure represents an internal form of signature in
 725  * signature database. A listed list may represent a signature list.
 726  *
 727  * @next:       Pointer to next entry
 728  * @onwer:      Signature owner
 729  * @data:       Pointer to signature data
 730  * @size:       Size of signature data
 731  */
 732 struct efi_sig_data {
 733         struct efi_sig_data *next;
 734         efi_guid_t owner;
 735         void *data;
 736         size_t size;
 737 };
 738
 739 /**
 740  * efi_signature_store - A decoded data of signature database
 741  *
 742  * This structure represents an internal form of signature database.
 743  *
 744  * @next:               Pointer to next entry
 745  * @sig_type:           Signature type
 746  * @sig_data_list:      Pointer to signature list
 747  */
 748 struct efi_signature_store {
 749         struct efi_signature_store *next;
 750         efi_guid_t sig_type;
 751         struct efi_sig_data *sig_data_list;
 752 };
 753
 754 struct x509_certificate;
 755 struct pkcs7_message;
 756
 757 bool efi_signature_verify_cert(struct x509_certificate *cert,
 758                                struct efi_signature_store *dbx);
 759 bool efi_signature_verify_signers(struct pkcs7_message *msg,
 760                                   struct efi_signature_store *dbx);
 761 bool efi_signature_verify_with_sigdb(struct efi_image_regions *regs,
 762                                      struct pkcs7_message *msg,
 763                                   struct efi_signature_store *db,
 764                                   struct x509_certificate **cert);
 765
 766 efi_status_t efi_image_region_add(struct efi_image_regions *regs,
 767                                   const void *start, const void *end,
 768                                   int nocheck);
 769
 770 void efi_sigstore_free(struct efi_signature_store *sigstore);
 771 struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
 772
 773 bool efi_secure_boot_enabled(void);
 774
 775 bool efi_image_parse(void *efi, size_t len, struct efi_image_regions **regp,
 776                      WIN_CERTIFICATE **auth, size_t *auth_len);
 777
 778 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
 779
 780 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
 781 #define __efi_runtime_data
 782 #define __efi_runtime
 783 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
 784 {
 785         return EFI_SUCCESS;
 786 }
 787
 788 /* No loader configured, stub out EFI_ENTRY */
 789 static inline void efi_restore_gd(void) { }
 790 static inline void efi_set_bootdev(const char *dev, const char *devnr,
 791                                    const char *path) { }
 792 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
 793 static inline void efi_print_image_infos(void *pc) { }
 794
 795 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
 796
 797 #endif /* _EFI_LOADER_H */