/* SPDX-License-Identifier: GPL-2.0+ */ /* * EFI application loader * * Copyright (c) 2016 Alexander Graf */ #ifndef _EFI_LOADER_H #define _EFI_LOADER_H 1 #include #include #include /* No need for efi loader support in SPL */ #if CONFIG_IS_ENABLED(EFI_LOADER) #include /* Maximum number of configuration tables */ #define EFI_MAX_CONFIGURATION_TABLES 16 /* GUID used by the root node */ #define U_BOOT_GUID \ EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \ 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b) /* Root node */ extern efi_handle_t efi_root; int __efi_entry_check(void); int __efi_exit_check(void); const char *__efi_nesting(void); const char *__efi_nesting_inc(void); const char *__efi_nesting_dec(void); /* * Enter the u-boot world from UEFI: */ #define EFI_ENTRY(format, ...) do { \ assert(__efi_entry_check()); \ debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \ __func__, ##__VA_ARGS__); \ } while(0) /* * Exit the u-boot world back to UEFI: */ #define EFI_EXIT(ret) ({ \ typeof(ret) _r = ret; \ debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \ __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \ assert(__efi_exit_check()); \ _r; \ }) /* * Call non-void UEFI function from u-boot and retrieve return value: */ #define EFI_CALL(exp) ({ \ debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \ assert(__efi_exit_check()); \ typeof(exp) _r = exp; \ assert(__efi_entry_check()); \ debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \ (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \ _r; \ }) /* * Call void UEFI function from u-boot: */ #define EFI_CALL_VOID(exp) do { \ debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \ assert(__efi_exit_check()); \ exp; \ assert(__efi_entry_check()); \ debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \ } while(0) /* * Write an indented message with EFI prefix */ #define EFI_PRINT(format, ...) ({ \ debug("%sEFI: " format, __efi_nesting(), \ ##__VA_ARGS__); \ }) #ifdef CONFIG_SYS_CACHELINE_SIZE #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE #else /* Just use the greatest cache flush alignment requirement I'm aware of */ #define EFI_CACHELINE_SIZE 128 #endif /* Key identifying current memory map */ extern efi_uintn_t efi_memory_map_key; extern struct efi_runtime_services efi_runtime_services; extern struct efi_system_table systab; extern struct efi_simple_text_output_protocol efi_con_out; extern struct efi_simple_text_input_protocol efi_con_in; extern struct efi_console_control_protocol efi_console_control; extern const struct efi_device_path_to_text_protocol efi_device_path_to_text; /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */ extern const struct efi_device_path_utilities_protocol efi_device_path_utilities; /* deprecated version of the EFI_UNICODE_COLLATION_PROTOCOL */ extern const struct efi_unicode_collation_protocol efi_unicode_collation_protocol; /* current version of the EFI_UNICODE_COLLATION_PROTOCOL */ extern const struct efi_unicode_collation_protocol efi_unicode_collation_protocol2; extern const struct efi_hii_config_routing_protocol efi_hii_config_routing; extern const struct efi_hii_config_access_protocol efi_hii_config_access; extern const struct efi_hii_database_protocol efi_hii_database; extern const struct efi_hii_string_protocol efi_hii_string; uint16_t *efi_dp_str(struct efi_device_path *dp); /* GUID of the U-Boot root node */ extern const efi_guid_t efi_u_boot_guid; /* GUID of the EFI_BLOCK_IO_PROTOCOL */ extern const efi_guid_t efi_block_io_guid; extern const efi_guid_t efi_global_variable_guid; extern const efi_guid_t efi_guid_console_control; extern const efi_guid_t efi_guid_device_path; /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */ extern const efi_guid_t efi_guid_driver_binding_protocol; /* event group ExitBootServices() invoked */ extern const efi_guid_t efi_guid_event_group_exit_boot_services; /* event group SetVirtualAddressMap() invoked */ extern const efi_guid_t efi_guid_event_group_virtual_address_change; /* event group memory map changed */ extern const efi_guid_t efi_guid_event_group_memory_map_change; /* event group boot manager about to boot */ extern const efi_guid_t efi_guid_event_group_ready_to_boot; /* event group ResetSystem() invoked (before ExitBootServices) */ extern const efi_guid_t efi_guid_event_group_reset_system; /* GUID of the device tree table */ extern const efi_guid_t efi_guid_fdt; extern const efi_guid_t efi_guid_loaded_image; extern const efi_guid_t efi_guid_loaded_image_device_path; extern const efi_guid_t efi_guid_device_path_to_text_protocol; extern const efi_guid_t efi_simple_file_system_protocol_guid; extern const efi_guid_t efi_file_info_guid; /* GUID for file system information */ extern const efi_guid_t efi_file_system_info_guid; extern const efi_guid_t efi_guid_device_path_utilities_protocol; /* GUID of the deprecated Unicode collation protocol */ extern const efi_guid_t efi_guid_unicode_collation_protocol; /* GUID of the Unicode collation protocol */ extern const efi_guid_t efi_guid_unicode_collation_protocol2; extern const efi_guid_t efi_guid_hii_config_routing_protocol; extern const efi_guid_t efi_guid_hii_config_access_protocol; extern const efi_guid_t efi_guid_hii_database_protocol; extern const efi_guid_t efi_guid_hii_string_protocol; extern unsigned int __efi_runtime_start, __efi_runtime_stop; extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop; /** * struct efi_open_protocol_info_item - open protocol info item * * When a protocol is opened a open protocol info entry is created. * These are maintained in a list. * * @link: link to the list of open protocol info entries of a protocol * @info: information about the opening of a protocol */ struct efi_open_protocol_info_item { struct list_head link; struct efi_open_protocol_info_entry info; }; /** * struct efi_handler - single protocol interface of a handle * * When the UEFI payload wants to open a protocol on an object to get its * interface (usually a struct with callback functions), this struct maps the * protocol GUID to the respective protocol interface * * @link: link to the list of protocols of a handle * @guid: GUID of the protocol * @protocol_interface: protocol interface * @open_infos link to the list of open protocol info items */ struct efi_handler { struct list_head link; const efi_guid_t *guid; void *protocol_interface; struct list_head open_infos; }; /** * enum efi_object_type - type of EFI object * * In UnloadImage we must be able to identify if the handle relates to a * started image. */ enum efi_object_type { EFI_OBJECT_TYPE_UNDEFINED = 0, EFI_OBJECT_TYPE_U_BOOT_FIRMWARE, EFI_OBJECT_TYPE_LOADED_IMAGE, EFI_OBJECT_TYPE_STARTED_IMAGE, }; /** * struct efi_object - dereferenced EFI handle * * @link: pointers to put the handle into a linked list * @protocols: linked list with the protocol interfaces installed on this * handle * * UEFI offers a flexible and expandable object model. The objects in the UEFI * API are devices, drivers, and loaded images. struct efi_object is our storage * structure for these objects. * * When including this structure into a larger structure always put it first so * that when deleting a handle the whole encompassing structure can be freed. * * A pointer to this structure is referred to as a handle. Typedef efi_handle_t * has been created for such pointers. */ struct efi_object { /* Every UEFI object is part of a global object list */ struct list_head link; /* The list of protocols */ struct list_head protocols; enum efi_object_type type; }; /** * struct efi_loaded_image_obj - handle of a loaded image * * @header: EFI object header * @exit_status: exit status passed to Exit() * @exit_data_size: exit data size passed to Exit() * @exit_data: exit data passed to Exit() * @exit_jmp: long jump buffer for returning form started image * @entry: entry address of the relocated image */ struct efi_loaded_image_obj { struct efi_object header; efi_status_t exit_status; efi_uintn_t *exit_data_size; u16 **exit_data; struct jmp_buf_data exit_jmp; EFIAPI efi_status_t (*entry)(efi_handle_t image_handle, struct efi_system_table *st); u16 image_type; }; /** * struct efi_event * * @link: Link to list of all events * @queue_link: Link to the list of queued events * @type: Type of event, see efi_create_event * @notify_tpl: Task priority level of notifications * @nofify_function: Function to call when the event is triggered * @notify_context: Data to be passed to the notify function * @group: Event group * @trigger_time: Period of the timer * @trigger_next: Next time to trigger the timer * @trigger_type: Type of timer, see efi_set_timer * @is_signaled: The event occurred. The event is in the signaled state. */ struct efi_event { struct list_head link; struct list_head queue_link; uint32_t type; efi_uintn_t notify_tpl; void (EFIAPI *notify_function)(struct efi_event *event, void *context); void *notify_context; const efi_guid_t *group; u64 trigger_next; u64 trigger_time; enum efi_timer_delay trigger_type; bool is_signaled; }; /* This list contains all UEFI objects we know of */ extern struct list_head efi_obj_list; /* List of all events */ extern struct list_head efi_events; /** * struct efi_protocol_notification - handle for notified protocol * * When a protocol interface is installed for which an event was registered with * the RegisterProtocolNotify() service this structure is used to hold the * handle on which the protocol interface was installed. * * @link: link to list of all handles notified for this event * @handle: handle on which the notified protocol interface was installed */ struct efi_protocol_notification { struct list_head link; efi_handle_t handle; }; /** * efi_register_notify_event - event registered by RegisterProtocolNotify() * * The address of this structure serves as registration value. * * @link: link to list of all registered events * @event: registered event. The same event may registered for multiple * GUIDs. * @protocol: protocol for which the event is registered * @handles: linked list of all handles on which the notified protocol was * installed */ struct efi_register_notify_event { struct list_head link; struct efi_event *event; efi_guid_t protocol; struct list_head handles; }; /* List of all events registered by RegisterProtocolNotify() */ extern struct list_head efi_register_notify_events; /* Initialize efi execution environment */ efi_status_t efi_init_obj_list(void); /* Called by bootefi to initialize root node */ efi_status_t efi_root_node_register(void); /* Called by bootefi to initialize runtime */ efi_status_t efi_initialize_system_table(void); /* Called by bootefi to make console interface available */ efi_status_t efi_console_register(void); /* Called by bootefi to make all disk storage accessible as EFI objects */ efi_status_t efi_disk_register(void); /* Create handles and protocols for the partitions of a block device */ int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc, const char *if_typename, int diskid, const char *pdevname); /* Called by bootefi to make GOP (graphical) interface available */ efi_status_t efi_gop_register(void); /* Called by bootefi to make the network interface available */ efi_status_t efi_net_register(void); /* Called by bootefi to make the watchdog available */ efi_status_t efi_watchdog_register(void); /* Called by bootefi to make SMBIOS tables available */ /** * efi_acpi_register() - write out ACPI tables * * Called by bootefi to make ACPI tables available * * @return 0 if OK, -ENOMEM if no memory is available for the tables */ efi_status_t efi_acpi_register(void); /** * efi_smbios_register() - write out SMBIOS tables * * Called by bootefi to make SMBIOS tables available * * @return 0 if OK, -ENOMEM if no memory is available for the tables */ efi_status_t efi_smbios_register(void); struct efi_simple_file_system_protocol * efi_fs_from_path(struct efi_device_path *fp); /* Called by networking code to memorize the dhcp ack package */ void efi_net_set_dhcp_ack(void *pkt, int len); /* Called by efi_set_watchdog_timer to reset the timer */ efi_status_t efi_set_watchdog(unsigned long timeout); /* Called from places to check whether a timer expired */ void efi_timer_check(void); /* PE loader implementation */ efi_status_t efi_load_pe(struct efi_loaded_image_obj *handle, void *efi, struct efi_loaded_image *loaded_image_info); /* Called once to store the pristine gd pointer */ void efi_save_gd(void); /* Special case handler for error/abort that just tries to dtrt to get * back to u-boot world */ void efi_restore_gd(void); /* Call this to relocate the runtime section to an address space */ void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map); /* Call this to set the current device name */ void efi_set_bootdev(const char *dev, const char *devnr, const char *path); /* Add a new object to the object list. */ void efi_add_handle(efi_handle_t obj); /* Create handle */ efi_status_t efi_create_handle(efi_handle_t *handle); /* Delete handle */ void efi_delete_handle(efi_handle_t obj); /* Call this to validate a handle and find the EFI object for it */ struct efi_object *efi_search_obj(const efi_handle_t handle); /* Load image */ efi_status_t EFIAPI efi_load_image(bool boot_policy, efi_handle_t parent_image, struct efi_device_path *file_path, void *source_buffer, efi_uintn_t source_size, efi_handle_t *image_handle); /* Start image */ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, efi_uintn_t *exit_data_size, u16 **exit_data); /* Unload image */ efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle); /* Find a protocol on a handle */ efi_status_t efi_search_protocol(const efi_handle_t handle, const efi_guid_t *protocol_guid, struct efi_handler **handler); /* Install new protocol on a handle */ efi_status_t efi_add_protocol(const efi_handle_t handle, const efi_guid_t *protocol, void *protocol_interface); /* Delete protocol from a handle */ efi_status_t efi_remove_protocol(const efi_handle_t handle, const efi_guid_t *protocol, void *protocol_interface); /* Delete all protocols from a handle */ efi_status_t efi_remove_all_protocols(const efi_handle_t handle); /* Install multiple protocol interfaces */ efi_status_t EFIAPI efi_install_multiple_protocol_interfaces (efi_handle_t *handle, ...); /* Call this to create an event */ efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl, void (EFIAPI *notify_function) ( struct efi_event *event, void *context), void *notify_context, efi_guid_t *group, struct efi_event **event); /* Call this to set a timer */ efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type, uint64_t trigger_time); /* Call this to signal an event */ void efi_signal_event(struct efi_event *event); /* open file system: */ struct efi_simple_file_system_protocol *efi_simple_file_system( struct blk_desc *desc, int part, struct efi_device_path *dp); /* open file from device-path: */ struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp); /** * efi_size_in_pages() - convert size in bytes to size in pages * * This macro returns the number of EFI memory pages required to hold 'size' * bytes. * * @size: size in bytes * Return: size in pages */ #define efi_size_in_pages(size) ((size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT) /* Generic EFI memory allocator, call this to get memory */ void *efi_alloc(uint64_t len, int memory_type); /* More specific EFI memory allocator, called by EFI payloads */ efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages, uint64_t *memory); /* EFI memory free function. */ efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages); /* EFI memory allocator for small allocations */ efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size, void **buffer); /* EFI pool memory free function. */ efi_status_t efi_free_pool(void *buffer); /* Returns the EFI memory map */ efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size, struct efi_mem_desc *memory_map, efi_uintn_t *map_key, efi_uintn_t *descriptor_size, uint32_t *descriptor_version); /* Adds a range into the EFI memory map */ uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type, bool overlap_only_ram); /* Called by board init to initialize the EFI drivers */ efi_status_t efi_driver_init(void); /* Called by board init to initialize the EFI memory map */ int efi_memory_init(void); /* Adds new or overrides configuration table entry to the system table */ efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table); /* Sets up a loaded image */ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path, struct efi_device_path *file_path, struct efi_loaded_image_obj **handle_ptr, struct efi_loaded_image **info_ptr); /* Print information about all loaded images */ void efi_print_image_infos(void *pc); #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER extern void *efi_bounce_buffer; #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024) #endif struct efi_device_path *efi_dp_next(const struct efi_device_path *dp); int efi_dp_match(const struct efi_device_path *a, const struct efi_device_path *b); struct efi_object *efi_dp_find_obj(struct efi_device_path *dp, struct efi_device_path **rem); /* get size of the first device path instance excluding end node */ efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp); /* size of multi-instance device path excluding end node */ efi_uintn_t efi_dp_size(const struct efi_device_path *dp); struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp); struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1, const struct efi_device_path *dp2); struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp, const struct efi_device_path *node); /* Create a device path node of given type, sub-type, length */ struct efi_device_path *efi_dp_create_device_node(const u8 type, const u8 sub_type, const u16 length); /* Append device path instance */ struct efi_device_path *efi_dp_append_instance( const struct efi_device_path *dp, const struct efi_device_path *dpi); /* Get next device path instance */ struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp, efi_uintn_t *size); /* Check if a device path contains muliple instances */ bool efi_dp_is_multi_instance(const struct efi_device_path *dp); struct efi_device_path *efi_dp_from_dev(struct udevice *dev); struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part); /* Create a device node for a block device partition. */ struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part); struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part, const char *path); struct efi_device_path *efi_dp_from_eth(void); struct efi_device_path *efi_dp_from_mem(uint32_t mem_type, uint64_t start_address, uint64_t end_address); /* Determine the last device path node that is not the end node. */ const struct efi_device_path *efi_dp_last_node( const struct efi_device_path *dp); efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path, struct efi_device_path **device_path, struct efi_device_path **file_path); efi_status_t efi_dp_from_name(const char *dev, const char *devnr, const char *path, struct efi_device_path **device, struct efi_device_path **file); #define EFI_DP_TYPE(_dp, _type, _subtype) \ (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \ ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype)) /** * ascii2unicode() - convert ASCII string to UTF-16 string * * A zero terminated ASCII string is converted to a zero terminated UTF-16 * string. The output buffer must be preassigned. * * @unicode: preassigned output buffer for UTF-16 string * @ascii: ASCII string to be converted */ static inline void ascii2unicode(u16 *unicode, const char *ascii) { while (*ascii) *(unicode++) = *(ascii++); *unicode = 0; } static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2) { return memcmp(g1, g2, sizeof(efi_guid_t)); } /* * Use these to indicate that your code / data should go into the EFI runtime * section and thus still be available when the OS is running */ #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime"))) #define __efi_runtime __attribute__ ((section (".text.efi_runtime"))) /* Indicate supported runtime services */ efi_status_t efi_init_runtime_supported(void); /* Update CRC32 in table header */ void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table); /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region * to make it available at runtime */ efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len); /* Boards may provide the functions below to implement RTS functionality */ void __efi_runtime EFIAPI efi_reset_system( enum efi_reset_type reset_type, efi_status_t reset_status, unsigned long data_size, void *reset_data); /* Architecture specific initialization of the EFI subsystem */ efi_status_t efi_reset_system_init(void); efi_status_t __efi_runtime EFIAPI efi_get_time( struct efi_time *time, struct efi_time_cap *capabilities); efi_status_t __efi_runtime EFIAPI efi_set_time(struct efi_time *time); #ifdef CONFIG_CMD_BOOTEFI_SELFTEST /* * Entry point for the tests of the EFI API. * It is called by 'bootefi selftest' */ efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle, struct efi_system_table *systab); #endif efi_status_t EFIAPI efi_get_variable(u16 *variable_name, const efi_guid_t *vendor, u32 *attributes, efi_uintn_t *data_size, void *data); efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size, u16 *variable_name, const efi_guid_t *vendor); efi_status_t EFIAPI efi_set_variable(u16 *variable_name, const efi_guid_t *vendor, u32 attributes, efi_uintn_t data_size, const void *data); /* * See section 3.1.3 in the v2.7 UEFI spec for more details on * the layout of EFI_LOAD_OPTION. In short it is: * * typedef struct _EFI_LOAD_OPTION { * UINT32 Attributes; * UINT16 FilePathListLength; * // CHAR16 Description[]; <-- variable length, NULL terminated * // EFI_DEVICE_PATH_PROTOCOL FilePathList[]; * <-- FilePathListLength bytes * // UINT8 OptionalData[]; * } EFI_LOAD_OPTION; */ struct efi_load_option { u32 attributes; u16 file_path_length; u16 *label; struct efi_device_path *file_path; const u8 *optional_data; }; void efi_deserialize_load_option(struct efi_load_option *lo, u8 *data); unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data); efi_status_t efi_bootmgr_load(efi_handle_t *handle); #else /* CONFIG_IS_ENABLED(EFI_LOADER) */ /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */ #define __efi_runtime_data #define __efi_runtime static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len) { return EFI_SUCCESS; } /* No loader configured, stub out EFI_ENTRY */ static inline void efi_restore_gd(void) { } static inline void efi_set_bootdev(const char *dev, const char *devnr, const char *path) { } static inline void efi_net_set_dhcp_ack(void *pkt, int len) { } static inline void efi_print_image_infos(void *pc) { } #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */ #endif /* _EFI_LOADER_H */