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Diffstat (limited to 'include/efi_loader.h')
| -rw-r--r-- | include/efi_loader.h | 672 |
1 files changed, 672 insertions, 0 deletions
diff --git a/include/efi_loader.h b/include/efi_loader.h new file mode 100644 index 0000000..381da80 --- /dev/null +++ b/include/efi_loader.h @@ -0,0 +1,672 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * EFI application loader + * + * Copyright (c) 2016 Alexander Graf + */ + +#ifndef _EFI_LOADER_H +#define _EFI_LOADER_H 1 + +#include <common.h> +#include <part_efi.h> +#include <efi_api.h> + +static inline int guidcmp(const void *g1, const void *g2) +{ + return memcmp(g1, g2, sizeof(efi_guid_t)); +} + +/* No need for efi loader support in SPL */ +#if CONFIG_IS_ENABLED(EFI_LOADER) + +#include <linux/list.h> + +/* 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) +/* GUID used as host device on sandbox */ +#define U_BOOT_HOST_DEV_GUID \ + EFI_GUID(0xbbe4e671, 0x5773, 0x4ea1, \ + 0x9a, 0xab, 0x3a, 0x7d, 0xbf, 0x40, 0xc4, 0x82) + +/* 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; +#ifdef CONFIG_SANDBOX +/* GUID of U-Boot host device on sandbox */ +extern const efi_guid_t efi_guid_host_dev; +#endif +/* 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); +/* Initialize variable services */ +efi_status_t efi_init_variables(void); +/* Notify ExitBootServices() is called */ +void efi_variables_boot_exit_notify(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); +/* efi_runtime_detach() - detach unimplemented runtime functions */ +void efi_runtime_detach(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 */ +efi_status_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type, + bool overlap_only_ram); +/* Adds a conventional range into the EFI memory map */ +efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end, + u64 ram_top); + +/* 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)) + +/* + * 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); + +efi_status_t EFIAPI efi_query_variable_info( + u32 attributes, u64 *maximum_variable_storage_size, + u64 *remaining_variable_storage_size, + u64 *maximum_variable_size); + +/* + * 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 */ |