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 CONFIG_IS_ENABLED(EFI_LOADER)
18 #include <linux/list.h>
20 /* Maximum number of configuration tables */
21 #define EFI_MAX_CONFIGURATION_TABLES 16
23 int __efi_entry_check(void);
24 int __efi_exit_check(void);
25 const char *__efi_nesting(void);
26 const char *__efi_nesting_inc(void);
27 const char *__efi_nesting_dec(void);
30 * Enter the u-boot world from UEFI:
32 #define EFI_ENTRY(format, ...) do { \
33 assert(__efi_entry_check()); \
34 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
35 __func__, ##__VA_ARGS__); \
39 * Exit the u-boot world back to UEFI:
41 #define EFI_EXIT(ret) ({ \
42 typeof(ret) _r = ret; \
43 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
44 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
45 assert(__efi_exit_check()); \
50 * Call non-void UEFI function from u-boot and retrieve return value:
52 #define EFI_CALL(exp) ({ \
53 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
54 assert(__efi_exit_check()); \
55 typeof(exp) _r = exp; \
56 assert(__efi_entry_check()); \
57 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
58 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
63 * Call void UEFI function from u-boot:
65 #define EFI_CALL_VOID(exp) do { \
66 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
67 assert(__efi_exit_check()); \
69 assert(__efi_entry_check()); \
70 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
74 * Write an indented message with EFI prefix
76 #define EFI_PRINT(format, ...) ({ \
77 debug("%sEFI: " format, __efi_nesting(), \
81 #ifdef CONFIG_SYS_CACHELINE_SIZE
82 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
84 /* Just use the greatest cache flush alignment requirement I'm aware of */
85 #define EFI_CACHELINE_SIZE 128
88 /* Key identifying current memory map */
89 extern efi_uintn_t efi_memory_map_key;
91 extern struct efi_runtime_services efi_runtime_services;
92 extern struct efi_system_table systab;
94 extern struct efi_simple_text_output_protocol efi_con_out;
95 extern struct efi_simple_text_input_protocol efi_con_in;
96 extern struct efi_console_control_protocol efi_console_control;
97 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
98 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
99 extern const struct efi_device_path_utilities_protocol
100 efi_device_path_utilities;
101 /* Implementation of the EFI_UNICODE_COLLATION_PROTOCOL */
102 extern const struct efi_unicode_collation_protocol
103 efi_unicode_collation_protocol;
105 uint16_t *efi_dp_str(struct efi_device_path *dp);
107 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
108 extern const efi_guid_t efi_block_io_guid;
109 extern const efi_guid_t efi_global_variable_guid;
110 extern const efi_guid_t efi_guid_console_control;
111 extern const efi_guid_t efi_guid_device_path;
112 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
113 extern const efi_guid_t efi_guid_driver_binding_protocol;
114 /* event group ExitBootServices() invoked */
115 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
116 /* event group SetVirtualAddressMap() invoked */
117 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
118 /* event group memory map changed */
119 extern const efi_guid_t efi_guid_event_group_memory_map_change;
120 /* event group boot manager about to boot */
121 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
122 /* event group ResetSystem() invoked (before ExitBootServices) */
123 extern const efi_guid_t efi_guid_event_group_reset_system;
124 /* GUID of the device tree table */
125 extern const efi_guid_t efi_guid_fdt;
126 extern const efi_guid_t efi_guid_loaded_image;
127 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
128 extern const efi_guid_t efi_simple_file_system_protocol_guid;
129 extern const efi_guid_t efi_file_info_guid;
130 /* GUID for file system information */
131 extern const efi_guid_t efi_file_system_info_guid;
132 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
133 /* GUID of the Unicode collation protocol */
134 extern const efi_guid_t efi_guid_unicode_collation_protocol;
136 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
137 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
140 * When a protocol is opened a open protocol info entry is created.
141 * These are maintained in a list.
143 struct efi_open_protocol_info_item {
144 /* Link to the list of open protocol info entries of a protocol */
145 struct list_head link;
146 struct efi_open_protocol_info_entry info;
150 * When the UEFI payload wants to open a protocol on an object to get its
151 * interface (usually a struct with callback functions), this struct maps the
152 * protocol GUID to the respective protocol interface
155 /* Link to the list of protocols of a handle */
156 struct list_head link;
157 const efi_guid_t *guid;
158 void *protocol_interface;
159 /* Link to the list of open protocol info items */
160 struct list_head open_infos;
164 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
165 * multiple different protocols (classes) attached to it.
167 * This struct is the parent struct for all of our actual implementation objects
168 * that can include it to make themselves an EFI object
171 /* Every UEFI object is part of a global object list */
172 struct list_head link;
173 /* The list of protocols */
174 struct list_head protocols;
175 /* The object spawner can either use this for data or as identifier */
182 * @link: Link to list of all events
183 * @type: Type of event, see efi_create_event
184 * @notify_tpl: Task priority level of notifications
185 * @nofify_function: Function to call when the event is triggered
186 * @notify_context: Data to be passed to the notify function
187 * @group: Event group
188 * @trigger_time: Period of the timer
189 * @trigger_next: Next time to trigger the timer
190 * @trigger_type: Type of timer, see efi_set_timer
191 * @is_queued: The notification function is queued
192 * @is_signaled: The event occurred. The event is in the signaled state.
195 struct list_head link;
197 efi_uintn_t notify_tpl;
198 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
199 void *notify_context;
200 const efi_guid_t *group;
203 enum efi_timer_delay trigger_type;
208 /* This list contains all UEFI objects we know of */
209 extern struct list_head efi_obj_list;
210 /* List of all events */
211 extern struct list_head efi_events;
213 /* Called by bootefi to initialize runtime */
214 efi_status_t efi_initialize_system_table(void);
215 /* Called by bootefi to make console interface available */
216 int efi_console_register(void);
217 /* Called by bootefi to make all disk storage accessible as EFI objects */
218 efi_status_t efi_disk_register(void);
219 /* Create handles and protocols for the partitions of a block device */
220 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
221 const char *if_typename, int diskid,
222 const char *pdevname);
223 /* Called by bootefi to make GOP (graphical) interface available */
224 efi_status_t efi_gop_register(void);
225 /* Called by bootefi to make the network interface available */
226 efi_status_t efi_net_register(void);
227 /* Called by bootefi to make the watchdog available */
228 efi_status_t efi_watchdog_register(void);
229 /* Called by bootefi to make SMBIOS tables available */
231 * efi_acpi_register() - write out ACPI tables
233 * Called by bootefi to make ACPI tables available
235 * @return 0 if OK, -ENOMEM if no memory is available for the tables
237 efi_status_t efi_acpi_register(void);
239 * efi_smbios_register() - write out SMBIOS tables
241 * Called by bootefi to make SMBIOS tables available
243 * @return 0 if OK, -ENOMEM if no memory is available for the tables
245 efi_status_t efi_smbios_register(void);
247 struct efi_simple_file_system_protocol *
248 efi_fs_from_path(struct efi_device_path *fp);
250 /* Called by networking code to memorize the dhcp ack package */
251 void efi_net_set_dhcp_ack(void *pkt, int len);
252 /* Called by efi_set_watchdog_timer to reset the timer */
253 efi_status_t efi_set_watchdog(unsigned long timeout);
255 /* Called from places to check whether a timer expired */
256 void efi_timer_check(void);
257 /* PE loader implementation */
258 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
259 /* Called once to store the pristine gd pointer */
260 void efi_save_gd(void);
261 /* Special case handler for error/abort that just tries to dtrt to get
262 * back to u-boot world */
263 void efi_restore_gd(void);
264 /* Call this to relocate the runtime section to an address space */
265 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
266 /* Call this to set the current device name */
267 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
268 /* Add a new object to the object list. */
269 void efi_add_handle(struct efi_object *obj);
271 efi_status_t efi_create_handle(efi_handle_t *handle);
273 void efi_delete_handle(struct efi_object *obj);
274 /* Call this to validate a handle and find the EFI object for it */
275 struct efi_object *efi_search_obj(const efi_handle_t handle);
276 /* Find a protocol on a handle */
277 efi_status_t efi_search_protocol(const efi_handle_t handle,
278 const efi_guid_t *protocol_guid,
279 struct efi_handler **handler);
280 /* Install new protocol on a handle */
281 efi_status_t efi_add_protocol(const efi_handle_t handle,
282 const efi_guid_t *protocol,
283 void *protocol_interface);
284 /* Delete protocol from a handle */
285 efi_status_t efi_remove_protocol(const efi_handle_t handle,
286 const efi_guid_t *protocol,
287 void *protocol_interface);
288 /* Delete all protocols from a handle */
289 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
290 /* Call this to create an event */
291 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
292 void (EFIAPI *notify_function) (
293 struct efi_event *event,
295 void *notify_context, efi_guid_t *group,
296 struct efi_event **event);
297 /* Call this to set a timer */
298 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
299 uint64_t trigger_time);
300 /* Call this to signal an event */
301 void efi_signal_event(struct efi_event *event, bool check_tpl);
303 /* open file system: */
304 struct efi_simple_file_system_protocol *efi_simple_file_system(
305 struct blk_desc *desc, int part, struct efi_device_path *dp);
307 /* open file from device-path: */
308 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
311 /* Generic EFI memory allocator, call this to get memory */
312 void *efi_alloc(uint64_t len, int memory_type);
313 /* More specific EFI memory allocator, called by EFI payloads */
314 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
316 /* EFI memory free function. */
317 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
318 /* EFI memory allocator for small allocations */
319 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
321 /* EFI pool memory free function. */
322 efi_status_t efi_free_pool(void *buffer);
323 /* Returns the EFI memory map */
324 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
325 struct efi_mem_desc *memory_map,
326 efi_uintn_t *map_key,
327 efi_uintn_t *descriptor_size,
328 uint32_t *descriptor_version);
329 /* Adds a range into the EFI memory map */
330 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
331 bool overlap_only_ram);
332 /* Called by board init to initialize the EFI drivers */
333 efi_status_t efi_driver_init(void);
334 /* Called by board init to initialize the EFI memory map */
335 int efi_memory_init(void);
336 /* Adds new or overrides configuration table entry to the system table */
337 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
338 /* Sets up a loaded image */
339 efi_status_t efi_setup_loaded_image(
340 struct efi_loaded_image *info, struct efi_object *obj,
341 struct efi_device_path *device_path,
342 struct efi_device_path *file_path);
343 efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
345 /* Print information about a loaded image */
346 efi_status_t efi_print_image_info(struct efi_loaded_image *image, void *pc);
347 /* Print information about all loaded images */
348 void efi_print_image_infos(void *pc);
350 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
351 extern void *efi_bounce_buffer;
352 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
356 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
357 int efi_dp_match(const struct efi_device_path *a,
358 const struct efi_device_path *b);
359 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
360 struct efi_device_path **rem);
361 /* get size of the first device path instance excluding end node */
362 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
363 /* size of multi-instance device path excluding end node */
364 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
365 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
366 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
367 const struct efi_device_path *dp2);
368 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
369 const struct efi_device_path *node);
370 /* Create a device path node of given type, sub-type, length */
371 struct efi_device_path *efi_dp_create_device_node(const u8 type,
374 /* Append device path instance */
375 struct efi_device_path *efi_dp_append_instance(
376 const struct efi_device_path *dp,
377 const struct efi_device_path *dpi);
378 /* Get next device path instance */
379 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
381 /* Check if a device path contains muliple instances */
382 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
384 struct efi_device_path *efi_dp_from_dev(struct udevice *dev);
385 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
386 /* Create a device node for a block device partition. */
387 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
388 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
390 struct efi_device_path *efi_dp_from_eth(void);
391 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
392 uint64_t start_address,
393 uint64_t end_address);
394 /* Determine the last device path node that is not the end node. */
395 const struct efi_device_path *efi_dp_last_node(
396 const struct efi_device_path *dp);
397 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
398 struct efi_device_path **device_path,
399 struct efi_device_path **file_path);
401 #define EFI_DP_TYPE(_dp, _type, _subtype) \
402 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
403 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
405 /* Convert strings from normal C strings to uEFI strings */
406 static inline void ascii2unicode(u16 *unicode, const char *ascii)
409 *(unicode++) = *(ascii++);
413 static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
415 return memcmp(g1, g2, sizeof(efi_guid_t));
419 * Use these to indicate that your code / data should go into the EFI runtime
420 * section and thus still be available when the OS is running
422 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
423 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
425 /* Update CRC32 in table header */
426 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
428 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
429 * to make it available at runtime */
430 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
432 /* Boards may provide the functions below to implement RTS functionality */
434 void __efi_runtime EFIAPI efi_reset_system(
435 enum efi_reset_type reset_type,
436 efi_status_t reset_status,
437 unsigned long data_size, void *reset_data);
439 /* Architecture specific initialization of the EFI subsystem */
440 efi_status_t efi_reset_system_init(void);
442 efi_status_t __efi_runtime EFIAPI efi_get_time(
443 struct efi_time *time,
444 struct efi_time_cap *capabilities);
446 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
448 * Entry point for the tests of the EFI API.
449 * It is called by 'bootefi selftest'
451 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
452 struct efi_system_table *systab);
455 efi_status_t EFIAPI efi_get_variable(u16 *variable_name, efi_guid_t *vendor,
456 u32 *attributes, efi_uintn_t *data_size,
458 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
461 efi_status_t EFIAPI efi_set_variable(u16 *variable_name, efi_guid_t *vendor,
462 u32 attributes, efi_uintn_t data_size,
465 void *efi_bootmgr_load(struct efi_device_path **device_path,
466 struct efi_device_path **file_path);
468 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
470 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
471 #define __efi_runtime_data
472 #define __efi_runtime
473 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
478 /* No loader configured, stub out EFI_ENTRY */
479 static inline void efi_restore_gd(void) { }
480 static inline void efi_set_bootdev(const char *dev, const char *devnr,
481 const char *path) { }
482 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
483 static inline void efi_print_image_infos(void *pc) { }
485 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
487 #endif /* _EFI_LOADER_H */