1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * EFI application loader
5 * Copyright (c) 2016 Alexander Graf
9 #define _EFI_LOADER_H 1
15 /* No need for efi loader support in SPL */
16 #if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD)
18 #include <linux/list.h>
20 int __efi_entry_check(void);
21 int __efi_exit_check(void);
22 const char *__efi_nesting(void);
23 const char *__efi_nesting_inc(void);
24 const char *__efi_nesting_dec(void);
27 * Enter the u-boot world from UEFI:
29 #define EFI_ENTRY(format, ...) do { \
30 assert(__efi_entry_check()); \
31 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
32 __func__, ##__VA_ARGS__); \
36 * Exit the u-boot world back to UEFI:
38 #define EFI_EXIT(ret) ({ \
39 typeof(ret) _r = ret; \
40 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
41 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
42 assert(__efi_exit_check()); \
47 * Call non-void UEFI function from u-boot and retrieve return value:
49 #define EFI_CALL(exp) ({ \
50 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
51 assert(__efi_exit_check()); \
52 typeof(exp) _r = exp; \
53 assert(__efi_entry_check()); \
54 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
55 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
60 * Call void UEFI function from u-boot:
62 #define EFI_CALL_VOID(exp) do { \
63 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
64 assert(__efi_exit_check()); \
66 assert(__efi_entry_check()); \
67 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
71 * Write an indented message with EFI prefix
73 #define EFI_PRINT(format, ...) ({ \
74 debug("%sEFI: " format, __efi_nesting(), \
78 #ifdef CONFIG_SYS_CACHELINE_SIZE
79 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
81 /* Just use the greatest cache flush alignment requirement I'm aware of */
82 #define EFI_CACHELINE_SIZE 128
85 /* Key identifying current memory map */
86 extern efi_uintn_t efi_memory_map_key;
88 extern struct efi_runtime_services efi_runtime_services;
89 extern struct efi_system_table systab;
91 extern struct efi_simple_text_output_protocol efi_con_out;
92 extern struct efi_simple_input_interface efi_con_in;
93 extern struct efi_console_control_protocol efi_console_control;
94 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
95 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
96 extern const struct efi_device_path_utilities_protocol
97 efi_device_path_utilities;
99 uint16_t *efi_dp_str(struct efi_device_path *dp);
101 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
102 extern const efi_guid_t efi_block_io_guid;
103 extern const efi_guid_t efi_global_variable_guid;
104 extern const efi_guid_t efi_guid_console_control;
105 extern const efi_guid_t efi_guid_device_path;
106 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
107 extern const efi_guid_t efi_guid_driver_binding_protocol;
108 /* event group ExitBootServices() invoked */
109 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
110 /* event group SetVirtualAddressMap() invoked */
111 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
112 /* event group memory map changed */
113 extern const efi_guid_t efi_guid_event_group_memory_map_change;
114 /* event group boot manager about to boot */
115 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
116 /* event group ResetSystem() invoked (before ExitBootServices) */
117 extern const efi_guid_t efi_guid_event_group_reset_system;
118 /* GUID of the device tree table */
119 extern const efi_guid_t efi_guid_fdt;
120 extern const efi_guid_t efi_guid_loaded_image;
121 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
122 extern const efi_guid_t efi_simple_file_system_protocol_guid;
123 extern const efi_guid_t efi_file_info_guid;
124 /* GUID for file system information */
125 extern const efi_guid_t efi_file_system_info_guid;
126 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
128 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
129 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
132 * When a protocol is opened a open protocol info entry is created.
133 * These are maintained in a list.
135 struct efi_open_protocol_info_item {
136 /* Link to the list of open protocol info entries of a protocol */
137 struct list_head link;
138 struct efi_open_protocol_info_entry info;
142 * When the UEFI payload wants to open a protocol on an object to get its
143 * interface (usually a struct with callback functions), this struct maps the
144 * protocol GUID to the respective protocol interface
147 /* Link to the list of protocols of a handle */
148 struct list_head link;
149 const efi_guid_t *guid;
150 void *protocol_interface;
151 /* Link to the list of open protocol info items */
152 struct list_head open_infos;
156 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
157 * multiple different protocols (classes) attached to it.
159 * This struct is the parent struct for all of our actual implementation objects
160 * that can include it to make themselves an EFI object
163 /* Every UEFI object is part of a global object list */
164 struct list_head link;
165 /* The list of protocols */
166 struct list_head protocols;
167 /* The object spawner can either use this for data or as identifier */
174 * @link: Link to list of all events
175 * @type: Type of event, see efi_create_event
176 * @notify_tpl: Task priority level of notifications
177 * @nofify_function: Function to call when the event is triggered
178 * @notify_context: Data to be passed to the notify function
179 * @group: Event group
180 * @trigger_time: Period of the timer
181 * @trigger_next: Next time to trigger the timer
182 * @trigger_type: Type of timer, see efi_set_timer
183 * @is_queued: The notification function is queued
184 * @is_signaled: The event occurred. The event is in the signaled state.
187 struct list_head link;
189 efi_uintn_t notify_tpl;
190 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
191 void *notify_context;
192 const efi_guid_t *group;
195 enum efi_timer_delay trigger_type;
200 /* This list contains all UEFI objects we know of */
201 extern struct list_head efi_obj_list;
202 /* List of all events */
203 extern struct list_head efi_events;
205 /* Called by bootefi to initialize runtime */
206 efi_status_t efi_initialize_system_table(void);
207 /* Called by bootefi to make console interface available */
208 int efi_console_register(void);
209 /* Called by bootefi to make all disk storage accessible as EFI objects */
210 efi_status_t efi_disk_register(void);
211 /* Create handles and protocols for the partitions of a block device */
212 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
213 const char *if_typename, int diskid,
214 const char *pdevname);
215 /* Called by bootefi to make GOP (graphical) interface available */
216 efi_status_t efi_gop_register(void);
217 /* Called by bootefi to make the network interface available */
218 efi_status_t efi_net_register(void);
219 /* Called by bootefi to make the watchdog available */
220 efi_status_t efi_watchdog_register(void);
221 /* Called by bootefi to make SMBIOS tables available */
223 * efi_acpi_register() - write out ACPI tables
225 * Called by bootefi to make ACPI tables available
227 * @return 0 if OK, -ENOMEM if no memory is available for the tables
229 efi_status_t efi_acpi_register(void);
231 * efi_smbios_register() - write out SMBIOS tables
233 * Called by bootefi to make SMBIOS tables available
235 * @return 0 if OK, -ENOMEM if no memory is available for the tables
237 efi_status_t efi_smbios_register(void);
239 struct efi_simple_file_system_protocol *
240 efi_fs_from_path(struct efi_device_path *fp);
242 /* Called by networking code to memorize the dhcp ack package */
243 void efi_net_set_dhcp_ack(void *pkt, int len);
244 /* Called by efi_set_watchdog_timer to reset the timer */
245 efi_status_t efi_set_watchdog(unsigned long timeout);
247 /* Called from places to check whether a timer expired */
248 void efi_timer_check(void);
249 /* PE loader implementation */
250 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
251 /* Called once to store the pristine gd pointer */
252 void efi_save_gd(void);
253 /* Special case handler for error/abort that just tries to dtrt to get
254 * back to u-boot world */
255 void efi_restore_gd(void);
256 /* Call this to relocate the runtime section to an address space */
257 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
258 /* Call this to set the current device name */
259 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
260 /* Add a new object to the object list. */
261 void efi_add_handle(struct efi_object *obj);
263 efi_status_t efi_create_handle(efi_handle_t *handle);
265 void efi_delete_handle(struct efi_object *obj);
266 /* Call this to validate a handle and find the EFI object for it */
267 struct efi_object *efi_search_obj(const efi_handle_t handle);
268 /* Find a protocol on a handle */
269 efi_status_t efi_search_protocol(const efi_handle_t handle,
270 const efi_guid_t *protocol_guid,
271 struct efi_handler **handler);
272 /* Install new protocol on a handle */
273 efi_status_t efi_add_protocol(const efi_handle_t handle,
274 const efi_guid_t *protocol,
275 void *protocol_interface);
276 /* Delete protocol from a handle */
277 efi_status_t efi_remove_protocol(const efi_handle_t handle,
278 const efi_guid_t *protocol,
279 void *protocol_interface);
280 /* Delete all protocols from a handle */
281 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
282 /* Call this to create an event */
283 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
284 void (EFIAPI *notify_function) (
285 struct efi_event *event,
287 void *notify_context, efi_guid_t *group,
288 struct efi_event **event);
289 /* Call this to set a timer */
290 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
291 uint64_t trigger_time);
292 /* Call this to signal an event */
293 void efi_signal_event(struct efi_event *event, bool check_tpl);
295 /* open file system: */
296 struct efi_simple_file_system_protocol *efi_simple_file_system(
297 struct blk_desc *desc, int part, struct efi_device_path *dp);
299 /* open file from device-path: */
300 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
303 /* Generic EFI memory allocator, call this to get memory */
304 void *efi_alloc(uint64_t len, int memory_type);
305 /* More specific EFI memory allocator, called by EFI payloads */
306 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
308 /* EFI memory free function. */
309 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
310 /* EFI memory allocator for small allocations */
311 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
313 /* EFI pool memory free function. */
314 efi_status_t efi_free_pool(void *buffer);
315 /* Returns the EFI memory map */
316 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
317 struct efi_mem_desc *memory_map,
318 efi_uintn_t *map_key,
319 efi_uintn_t *descriptor_size,
320 uint32_t *descriptor_version);
321 /* Adds a range into the EFI memory map */
322 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
323 bool overlap_only_ram);
324 /* Called by board init to initialize the EFI drivers */
325 efi_status_t efi_driver_init(void);
326 /* Called by board init to initialize the EFI memory map */
327 int efi_memory_init(void);
328 /* Adds new or overrides configuration table entry to the system table */
329 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
330 /* Sets up a loaded image */
331 efi_status_t efi_setup_loaded_image(
332 struct efi_loaded_image *info, struct efi_object *obj,
333 struct efi_device_path *device_path,
334 struct efi_device_path *file_path);
335 efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
337 /* Print information about a loaded image */
338 efi_status_t efi_print_image_info(struct efi_loaded_image *image, void *pc);
339 /* Print information about all loaded images */
340 void efi_print_image_infos(void *pc);
342 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
343 extern void *efi_bounce_buffer;
344 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
348 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
349 int efi_dp_match(const struct efi_device_path *a,
350 const struct efi_device_path *b);
351 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
352 struct efi_device_path **rem);
353 /* get size of the first device path instance excluding end node */
354 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
355 /* size of multi-instance device path excluding end node */
356 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
357 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
358 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
359 const struct efi_device_path *dp2);
360 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
361 const struct efi_device_path *node);
362 /* Create a device path node of given type, sub-type, length */
363 struct efi_device_path *efi_dp_create_device_node(const u8 type,
366 /* Append device path instance */
367 struct efi_device_path *efi_dp_append_instance(
368 const struct efi_device_path *dp,
369 const struct efi_device_path *dpi);
370 /* Get next device path instance */
371 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
373 /* Check if a device path contains muliple instances */
374 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
376 struct efi_device_path *efi_dp_from_dev(struct udevice *dev);
377 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
378 /* Create a device node for a block device partition. */
379 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
380 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
382 struct efi_device_path *efi_dp_from_eth(void);
383 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
384 uint64_t start_address,
385 uint64_t end_address);
386 /* Determine the last device path node that is not the end node. */
387 const struct efi_device_path *efi_dp_last_node(
388 const struct efi_device_path *dp);
389 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
390 struct efi_device_path **device_path,
391 struct efi_device_path **file_path);
393 #define EFI_DP_TYPE(_dp, _type, _subtype) \
394 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
395 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
397 /* Convert strings from normal C strings to uEFI strings */
398 static inline void ascii2unicode(u16 *unicode, const char *ascii)
401 *(unicode++) = *(ascii++);
405 static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
407 return memcmp(g1, g2, sizeof(efi_guid_t));
411 * Use these to indicate that your code / data should go into the EFI runtime
412 * section and thus still be available when the OS is running
414 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
415 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
417 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
418 * to make it available at runtime */
419 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
421 /* Boards may provide the functions below to implement RTS functionality */
423 void __efi_runtime EFIAPI efi_reset_system(
424 enum efi_reset_type reset_type,
425 efi_status_t reset_status,
426 unsigned long data_size, void *reset_data);
428 /* Architecture specific initialization of the EFI subsystem */
429 efi_status_t efi_reset_system_init(void);
431 efi_status_t __efi_runtime EFIAPI efi_get_time(
432 struct efi_time *time,
433 struct efi_time_cap *capabilities);
434 efi_status_t efi_get_time_init(void);
436 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
438 * Entry point for the tests of the EFI API.
439 * It is called by 'bootefi selftest'
441 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
442 struct efi_system_table *systab);
445 efi_status_t EFIAPI efi_get_variable(u16 *variable_name, efi_guid_t *vendor,
446 u32 *attributes, efi_uintn_t *data_size,
448 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
451 efi_status_t EFIAPI efi_set_variable(u16 *variable_name, efi_guid_t *vendor,
452 u32 attributes, efi_uintn_t data_size,
455 void *efi_bootmgr_load(struct efi_device_path **device_path,
456 struct efi_device_path **file_path);
458 #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
460 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
461 #define __efi_runtime_data
462 #define __efi_runtime
463 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
468 /* No loader configured, stub out EFI_ENTRY */
469 static inline void efi_restore_gd(void) { }
470 static inline void efi_set_bootdev(const char *dev, const char *devnr,
471 const char *path) { }
472 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
473 static inline void efi_print_image_infos(void *pc) { }
475 #endif /* CONFIG_EFI_LOADER && !CONFIG_SPL_BUILD */
477 #endif /* _EFI_LOADER_H */