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 extern struct efi_runtime_services efi_runtime_services;
79 extern struct efi_system_table systab;
81 extern struct efi_simple_text_output_protocol efi_con_out;
82 extern struct efi_simple_input_interface efi_con_in;
83 extern struct efi_console_control_protocol efi_console_control;
84 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
85 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
86 extern const struct efi_device_path_utilities_protocol
87 efi_device_path_utilities;
89 uint16_t *efi_dp_str(struct efi_device_path *dp);
91 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
92 extern const efi_guid_t efi_block_io_guid;
93 extern const efi_guid_t efi_global_variable_guid;
94 extern const efi_guid_t efi_guid_console_control;
95 extern const efi_guid_t efi_guid_device_path;
96 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
97 extern const efi_guid_t efi_guid_driver_binding_protocol;
98 /* event group ExitBootServices() invoked */
99 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
100 /* event group SetVirtualAddressMap() invoked */
101 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
102 /* event group memory map changed */
103 extern const efi_guid_t efi_guid_event_group_memory_map_change;
104 /* event group boot manager about to boot */
105 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
106 /* event group ResetSystem() invoked (before ExitBootServices) */
107 extern const efi_guid_t efi_guid_event_group_reset_system;
108 /* GUID of the device tree table */
109 extern const efi_guid_t efi_guid_fdt;
110 extern const efi_guid_t efi_guid_loaded_image;
111 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
112 extern const efi_guid_t efi_simple_file_system_protocol_guid;
113 extern const efi_guid_t efi_file_info_guid;
114 /* GUID for file system information */
115 extern const efi_guid_t efi_file_system_info_guid;
116 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
118 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
119 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
122 * When a protocol is opened a open protocol info entry is created.
123 * These are maintained in a list.
125 struct efi_open_protocol_info_item {
126 /* Link to the list of open protocol info entries of a protocol */
127 struct list_head link;
128 struct efi_open_protocol_info_entry info;
132 * When the UEFI payload wants to open a protocol on an object to get its
133 * interface (usually a struct with callback functions), this struct maps the
134 * protocol GUID to the respective protocol interface
137 /* Link to the list of protocols of a handle */
138 struct list_head link;
139 const efi_guid_t *guid;
140 void *protocol_interface;
141 /* Link to the list of open protocol info items */
142 struct list_head open_infos;
146 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
147 * multiple different protocols (classes) attached to it.
149 * This struct is the parent struct for all of our actual implementation objects
150 * that can include it to make themselves an EFI object
153 /* Every UEFI object is part of a global object list */
154 struct list_head link;
155 /* The list of protocols */
156 struct list_head protocols;
157 /* The object spawner can either use this for data or as identifier */
164 * @link: Link to list of all events
165 * @type: Type of event, see efi_create_event
166 * @notify_tpl: Task priority level of notifications
167 * @nofify_function: Function to call when the event is triggered
168 * @notify_context: Data to be passed to the notify function
169 * @group: Event group
170 * @trigger_time: Period of the timer
171 * @trigger_next: Next time to trigger the timer
172 * @trigger_type: Type of timer, see efi_set_timer
173 * @is_queued: The notification function is queued
174 * @is_signaled: The event occurred. The event is in the signaled state.
177 struct list_head link;
179 efi_uintn_t notify_tpl;
180 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
181 void *notify_context;
182 const efi_guid_t *group;
185 enum efi_timer_delay trigger_type;
190 /* This list contains all UEFI objects we know of */
191 extern struct list_head efi_obj_list;
192 /* List of all events */
193 extern struct list_head efi_events;
195 /* Called by bootefi to make console interface available */
196 int efi_console_register(void);
197 /* Called by bootefi to make all disk storage accessible as EFI objects */
198 efi_status_t efi_disk_register(void);
199 /* Create handles and protocols for the partitions of a block device */
200 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
201 const char *if_typename, int diskid,
202 const char *pdevname);
203 /* Called by bootefi to make GOP (graphical) interface available */
204 efi_status_t efi_gop_register(void);
205 /* Called by bootefi to make the network interface available */
206 efi_status_t efi_net_register(void);
207 /* Called by bootefi to make the watchdog available */
208 efi_status_t efi_watchdog_register(void);
209 /* Called by bootefi to make SMBIOS tables available */
210 efi_status_t efi_smbios_register(void);
212 struct efi_simple_file_system_protocol *
213 efi_fs_from_path(struct efi_device_path *fp);
215 /* Called by networking code to memorize the dhcp ack package */
216 void efi_net_set_dhcp_ack(void *pkt, int len);
217 /* Called by efi_set_watchdog_timer to reset the timer */
218 efi_status_t efi_set_watchdog(unsigned long timeout);
220 /* Called from places to check whether a timer expired */
221 void efi_timer_check(void);
222 /* PE loader implementation */
223 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
224 /* Called once to store the pristine gd pointer */
225 void efi_save_gd(void);
226 /* Special case handler for error/abort that just tries to dtrt to get
227 * back to u-boot world */
228 void efi_restore_gd(void);
229 /* Call this to relocate the runtime section to an address space */
230 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
231 /* Call this to set the current device name */
232 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
233 /* Add a new object to the object list. */
234 void efi_add_handle(struct efi_object *obj);
236 efi_status_t efi_create_handle(efi_handle_t *handle);
238 void efi_delete_handle(struct efi_object *obj);
239 /* Call this to validate a handle and find the EFI object for it */
240 struct efi_object *efi_search_obj(const efi_handle_t handle);
241 /* Find a protocol on a handle */
242 efi_status_t efi_search_protocol(const efi_handle_t handle,
243 const efi_guid_t *protocol_guid,
244 struct efi_handler **handler);
245 /* Install new protocol on a handle */
246 efi_status_t efi_add_protocol(const efi_handle_t handle,
247 const efi_guid_t *protocol,
248 void *protocol_interface);
249 /* Delete protocol from a handle */
250 efi_status_t efi_remove_protocol(const efi_handle_t handle,
251 const efi_guid_t *protocol,
252 void *protocol_interface);
253 /* Delete all protocols from a handle */
254 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
255 /* Call this to create an event */
256 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
257 void (EFIAPI *notify_function) (
258 struct efi_event *event,
260 void *notify_context, efi_guid_t *group,
261 struct efi_event **event);
262 /* Call this to set a timer */
263 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
264 uint64_t trigger_time);
265 /* Call this to signal an event */
266 void efi_signal_event(struct efi_event *event, bool check_tpl);
268 /* open file system: */
269 struct efi_simple_file_system_protocol *efi_simple_file_system(
270 struct blk_desc *desc, int part, struct efi_device_path *dp);
272 /* open file from device-path: */
273 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
276 /* Generic EFI memory allocator, call this to get memory */
277 void *efi_alloc(uint64_t len, int memory_type);
278 /* More specific EFI memory allocator, called by EFI payloads */
279 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
281 /* EFI memory free function. */
282 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
283 /* EFI memory allocator for small allocations */
284 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
286 /* EFI pool memory free function. */
287 efi_status_t efi_free_pool(void *buffer);
288 /* Returns the EFI memory map */
289 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
290 struct efi_mem_desc *memory_map,
291 efi_uintn_t *map_key,
292 efi_uintn_t *descriptor_size,
293 uint32_t *descriptor_version);
294 /* Adds a range into the EFI memory map */
295 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
296 bool overlap_only_ram);
297 /* Called by board init to initialize the EFI drivers */
298 efi_status_t efi_driver_init(void);
299 /* Called by board init to initialize the EFI memory map */
300 int efi_memory_init(void);
301 /* Adds new or overrides configuration table entry to the system table */
302 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
303 /* Sets up a loaded image */
304 efi_status_t efi_setup_loaded_image(
305 struct efi_loaded_image *info, struct efi_object *obj,
306 struct efi_device_path *device_path,
307 struct efi_device_path *file_path);
308 efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
310 /* Print information about a loaded image */
311 efi_status_t efi_print_image_info(struct efi_loaded_image *image, void *pc);
312 /* Print information about all loaded images */
313 void efi_print_image_infos(void *pc);
315 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
316 extern void *efi_bounce_buffer;
317 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
321 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
322 int efi_dp_match(const struct efi_device_path *a,
323 const struct efi_device_path *b);
324 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
325 struct efi_device_path **rem);
326 /* get size of the first device path instance excluding end node */
327 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
328 /* size of multi-instance device path excluding end node */
329 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
330 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
331 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
332 const struct efi_device_path *dp2);
333 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
334 const struct efi_device_path *node);
335 /* Create a device path node of given type, sub-type, length */
336 struct efi_device_path *efi_dp_create_device_node(const u8 type,
339 /* Append device path instance */
340 struct efi_device_path *efi_dp_append_instance(
341 const struct efi_device_path *dp,
342 const struct efi_device_path *dpi);
343 /* Get next device path instance */
344 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
346 /* Check if a device path contains muliple instances */
347 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
349 struct efi_device_path *efi_dp_from_dev(struct udevice *dev);
350 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
351 /* Create a device node for a block device partition. */
352 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
353 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
355 struct efi_device_path *efi_dp_from_eth(void);
356 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
357 uint64_t start_address,
358 uint64_t end_address);
359 /* Determine the last device path node that is not the end node. */
360 const struct efi_device_path *efi_dp_last_node(
361 const struct efi_device_path *dp);
362 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
363 struct efi_device_path **device_path,
364 struct efi_device_path **file_path);
366 #define EFI_DP_TYPE(_dp, _type, _subtype) \
367 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
368 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
370 /* Convert strings from normal C strings to uEFI strings */
371 static inline void ascii2unicode(u16 *unicode, const char *ascii)
374 *(unicode++) = *(ascii++);
378 static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
380 return memcmp(g1, g2, sizeof(efi_guid_t));
384 * Use these to indicate that your code / data should go into the EFI runtime
385 * section and thus still be available when the OS is running
387 #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data")))
388 #define __efi_runtime __attribute__ ((section ("efi_runtime_text")))
390 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
391 * to make it available at runtime */
392 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
394 /* Boards may provide the functions below to implement RTS functionality */
396 void __efi_runtime EFIAPI efi_reset_system(
397 enum efi_reset_type reset_type,
398 efi_status_t reset_status,
399 unsigned long data_size, void *reset_data);
401 /* Architecture specific initialization of the EFI subsystem */
402 efi_status_t efi_reset_system_init(void);
404 efi_status_t __efi_runtime EFIAPI efi_get_time(
405 struct efi_time *time,
406 struct efi_time_cap *capabilities);
407 efi_status_t efi_get_time_init(void);
409 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
411 * Entry point for the tests of the EFI API.
412 * It is called by 'bootefi selftest'
414 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
415 struct efi_system_table *systab);
418 efi_status_t EFIAPI efi_get_variable(s16 *variable_name,
419 efi_guid_t *vendor, u32 *attributes,
420 unsigned long *data_size, void *data);
421 efi_status_t EFIAPI efi_get_next_variable(
422 unsigned long *variable_name_size,
423 s16 *variable_name, efi_guid_t *vendor);
424 efi_status_t EFIAPI efi_set_variable(s16 *variable_name,
425 efi_guid_t *vendor, u32 attributes,
426 unsigned long data_size, void *data);
428 void *efi_bootmgr_load(struct efi_device_path **device_path,
429 struct efi_device_path **file_path);
431 #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
433 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
434 #define __efi_runtime_data
435 #define __efi_runtime
436 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
441 /* No loader configured, stub out EFI_ENTRY */
442 static inline void efi_restore_gd(void) { }
443 static inline void efi_set_bootdev(const char *dev, const char *devnr,
444 const char *path) { }
445 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
446 static inline void efi_print_image_infos(void *pc) { }
448 #endif /* CONFIG_EFI_LOADER && !CONFIG_SPL_BUILD */
450 #endif /* _EFI_LOADER_H */