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 /* GUID used by the root node */
25 EFI_GUID(0xe61d73b9, 0xa384, 0x4acc, \
26 0xae, 0xab, 0x82, 0xe8, 0x28, 0xf3, 0x62, 0x8b)
28 int __efi_entry_check(void);
29 int __efi_exit_check(void);
30 const char *__efi_nesting(void);
31 const char *__efi_nesting_inc(void);
32 const char *__efi_nesting_dec(void);
35 * Enter the u-boot world from UEFI:
37 #define EFI_ENTRY(format, ...) do { \
38 assert(__efi_entry_check()); \
39 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
40 __func__, ##__VA_ARGS__); \
44 * Exit the u-boot world back to UEFI:
46 #define EFI_EXIT(ret) ({ \
47 typeof(ret) _r = ret; \
48 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
49 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
50 assert(__efi_exit_check()); \
55 * Call non-void UEFI function from u-boot and retrieve return value:
57 #define EFI_CALL(exp) ({ \
58 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
59 assert(__efi_exit_check()); \
60 typeof(exp) _r = exp; \
61 assert(__efi_entry_check()); \
62 debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
63 (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
68 * Call void UEFI function from u-boot:
70 #define EFI_CALL_VOID(exp) do { \
71 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
72 assert(__efi_exit_check()); \
74 assert(__efi_entry_check()); \
75 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
79 * Write an indented message with EFI prefix
81 #define EFI_PRINT(format, ...) ({ \
82 debug("%sEFI: " format, __efi_nesting(), \
86 #ifdef CONFIG_SYS_CACHELINE_SIZE
87 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
89 /* Just use the greatest cache flush alignment requirement I'm aware of */
90 #define EFI_CACHELINE_SIZE 128
93 /* Key identifying current memory map */
94 extern efi_uintn_t efi_memory_map_key;
96 extern struct efi_runtime_services efi_runtime_services;
97 extern struct efi_system_table systab;
99 extern struct efi_simple_text_output_protocol efi_con_out;
100 extern struct efi_simple_text_input_protocol efi_con_in;
101 extern struct efi_console_control_protocol efi_console_control;
102 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
103 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
104 extern const struct efi_device_path_utilities_protocol
105 efi_device_path_utilities;
106 /* Implementation of the EFI_UNICODE_COLLATION_PROTOCOL */
107 extern const struct efi_unicode_collation_protocol
108 efi_unicode_collation_protocol;
110 uint16_t *efi_dp_str(struct efi_device_path *dp);
112 /* GUID of the U-Boot root node */
113 extern const efi_guid_t efi_u_boot_guid;
114 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
115 extern const efi_guid_t efi_block_io_guid;
116 extern const efi_guid_t efi_global_variable_guid;
117 extern const efi_guid_t efi_guid_console_control;
118 extern const efi_guid_t efi_guid_device_path;
119 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
120 extern const efi_guid_t efi_guid_driver_binding_protocol;
121 /* event group ExitBootServices() invoked */
122 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
123 /* event group SetVirtualAddressMap() invoked */
124 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
125 /* event group memory map changed */
126 extern const efi_guid_t efi_guid_event_group_memory_map_change;
127 /* event group boot manager about to boot */
128 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
129 /* event group ResetSystem() invoked (before ExitBootServices) */
130 extern const efi_guid_t efi_guid_event_group_reset_system;
131 /* GUID of the device tree table */
132 extern const efi_guid_t efi_guid_fdt;
133 extern const efi_guid_t efi_guid_loaded_image;
134 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
135 extern const efi_guid_t efi_simple_file_system_protocol_guid;
136 extern const efi_guid_t efi_file_info_guid;
137 /* GUID for file system information */
138 extern const efi_guid_t efi_file_system_info_guid;
139 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
140 /* GUID of the Unicode collation protocol */
141 extern const efi_guid_t efi_guid_unicode_collation_protocol;
143 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
144 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
147 * When a protocol is opened a open protocol info entry is created.
148 * These are maintained in a list.
150 struct efi_open_protocol_info_item {
151 /* Link to the list of open protocol info entries of a protocol */
152 struct list_head link;
153 struct efi_open_protocol_info_entry info;
157 * When the UEFI payload wants to open a protocol on an object to get its
158 * interface (usually a struct with callback functions), this struct maps the
159 * protocol GUID to the respective protocol interface
162 /* Link to the list of protocols of a handle */
163 struct list_head link;
164 const efi_guid_t *guid;
165 void *protocol_interface;
166 /* Link to the list of open protocol info items */
167 struct list_head open_infos;
171 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
172 * multiple different protocols (classes) attached to it.
174 * This struct is the parent struct for all of our actual implementation objects
175 * that can include it to make themselves an EFI object
178 /* Every UEFI object is part of a global object list */
179 struct list_head link;
180 /* The list of protocols */
181 struct list_head protocols;
182 /* The object spawner can either use this for data or as identifier */
187 * struct efi_loaded_image_obj - handle of a loaded image
189 struct efi_loaded_image_obj {
190 /* Generic EFI object parent class data */
191 struct efi_object parent;
193 aligned_u64 reloc_size;
194 efi_status_t exit_status;
195 struct jmp_buf_data exit_jmp;
196 EFIAPI efi_status_t (*entry)(efi_handle_t image_handle,
197 struct efi_system_table *st);
203 * @link: Link to list of all events
204 * @type: Type of event, see efi_create_event
205 * @notify_tpl: Task priority level of notifications
206 * @nofify_function: Function to call when the event is triggered
207 * @notify_context: Data to be passed to the notify function
208 * @group: Event group
209 * @trigger_time: Period of the timer
210 * @trigger_next: Next time to trigger the timer
211 * @trigger_type: Type of timer, see efi_set_timer
212 * @is_queued: The notification function is queued
213 * @is_signaled: The event occurred. The event is in the signaled state.
216 struct list_head link;
218 efi_uintn_t notify_tpl;
219 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
220 void *notify_context;
221 const efi_guid_t *group;
224 enum efi_timer_delay trigger_type;
229 /* This list contains all UEFI objects we know of */
230 extern struct list_head efi_obj_list;
231 /* List of all events */
232 extern struct list_head efi_events;
234 /* Called by bootefi to initialize root node */
235 efi_status_t efi_root_node_register(void);
236 /* Called by bootefi to initialize runtime */
237 efi_status_t efi_initialize_system_table(void);
238 /* Called by bootefi to make console interface available */
239 efi_status_t efi_console_register(void);
240 /* Called by bootefi to make all disk storage accessible as EFI objects */
241 efi_status_t efi_disk_register(void);
242 /* Create handles and protocols for the partitions of a block device */
243 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
244 const char *if_typename, int diskid,
245 const char *pdevname);
246 /* Called by bootefi to make GOP (graphical) interface available */
247 efi_status_t efi_gop_register(void);
248 /* Called by bootefi to make the network interface available */
249 efi_status_t efi_net_register(void);
250 /* Called by bootefi to make the watchdog available */
251 efi_status_t efi_watchdog_register(void);
252 /* Called by bootefi to make SMBIOS tables available */
254 * efi_acpi_register() - write out ACPI tables
256 * Called by bootefi to make ACPI tables available
258 * @return 0 if OK, -ENOMEM if no memory is available for the tables
260 efi_status_t efi_acpi_register(void);
262 * efi_smbios_register() - write out SMBIOS tables
264 * Called by bootefi to make SMBIOS tables available
266 * @return 0 if OK, -ENOMEM if no memory is available for the tables
268 efi_status_t efi_smbios_register(void);
270 struct efi_simple_file_system_protocol *
271 efi_fs_from_path(struct efi_device_path *fp);
273 /* Called by networking code to memorize the dhcp ack package */
274 void efi_net_set_dhcp_ack(void *pkt, int len);
275 /* Called by efi_set_watchdog_timer to reset the timer */
276 efi_status_t efi_set_watchdog(unsigned long timeout);
278 /* Called from places to check whether a timer expired */
279 void efi_timer_check(void);
280 /* PE loader implementation */
281 void *efi_load_pe(struct efi_loaded_image_obj *handle, void *efi,
282 struct efi_loaded_image *loaded_image_info);
283 /* Called once to store the pristine gd pointer */
284 void efi_save_gd(void);
285 /* Special case handler for error/abort that just tries to dtrt to get
286 * back to u-boot world */
287 void efi_restore_gd(void);
288 /* Call this to relocate the runtime section to an address space */
289 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
290 /* Call this to set the current device name */
291 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
292 /* Add a new object to the object list. */
293 void efi_add_handle(struct efi_object *obj);
295 efi_status_t efi_create_handle(efi_handle_t *handle);
297 void efi_delete_handle(struct efi_object *obj);
298 /* Call this to validate a handle and find the EFI object for it */
299 struct efi_object *efi_search_obj(const efi_handle_t handle);
300 /* Find a protocol on a handle */
301 efi_status_t efi_search_protocol(const efi_handle_t handle,
302 const efi_guid_t *protocol_guid,
303 struct efi_handler **handler);
304 /* Install new protocol on a handle */
305 efi_status_t efi_add_protocol(const efi_handle_t handle,
306 const efi_guid_t *protocol,
307 void *protocol_interface);
308 /* Delete protocol from a handle */
309 efi_status_t efi_remove_protocol(const efi_handle_t handle,
310 const efi_guid_t *protocol,
311 void *protocol_interface);
312 /* Delete all protocols from a handle */
313 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
314 /* Call this to create an event */
315 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
316 void (EFIAPI *notify_function) (
317 struct efi_event *event,
319 void *notify_context, efi_guid_t *group,
320 struct efi_event **event);
321 /* Call this to set a timer */
322 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
323 uint64_t trigger_time);
324 /* Call this to signal an event */
325 void efi_signal_event(struct efi_event *event, bool check_tpl);
327 /* open file system: */
328 struct efi_simple_file_system_protocol *efi_simple_file_system(
329 struct blk_desc *desc, int part, struct efi_device_path *dp);
331 /* open file from device-path: */
332 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
335 /* Generic EFI memory allocator, call this to get memory */
336 void *efi_alloc(uint64_t len, int memory_type);
337 /* More specific EFI memory allocator, called by EFI payloads */
338 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
340 /* EFI memory free function. */
341 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
342 /* EFI memory allocator for small allocations */
343 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
345 /* EFI pool memory free function. */
346 efi_status_t efi_free_pool(void *buffer);
347 /* Returns the EFI memory map */
348 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
349 struct efi_mem_desc *memory_map,
350 efi_uintn_t *map_key,
351 efi_uintn_t *descriptor_size,
352 uint32_t *descriptor_version);
353 /* Adds a range into the EFI memory map */
354 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
355 bool overlap_only_ram);
356 /* Called by board init to initialize the EFI drivers */
357 efi_status_t efi_driver_init(void);
358 /* Called by board init to initialize the EFI memory map */
359 int efi_memory_init(void);
360 /* Adds new or overrides configuration table entry to the system table */
361 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
362 /* Sets up a loaded image */
363 efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
364 struct efi_device_path *file_path,
365 struct efi_loaded_image_obj **handle_ptr,
366 struct efi_loaded_image **info_ptr);
367 efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
369 /* Print information about all loaded images */
370 void efi_print_image_infos(void *pc);
372 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
373 extern void *efi_bounce_buffer;
374 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
378 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
379 int efi_dp_match(const struct efi_device_path *a,
380 const struct efi_device_path *b);
381 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
382 struct efi_device_path **rem);
383 /* get size of the first device path instance excluding end node */
384 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
385 /* size of multi-instance device path excluding end node */
386 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
387 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
388 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
389 const struct efi_device_path *dp2);
390 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
391 const struct efi_device_path *node);
392 /* Create a device path node of given type, sub-type, length */
393 struct efi_device_path *efi_dp_create_device_node(const u8 type,
396 /* Append device path instance */
397 struct efi_device_path *efi_dp_append_instance(
398 const struct efi_device_path *dp,
399 const struct efi_device_path *dpi);
400 /* Get next device path instance */
401 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
403 /* Check if a device path contains muliple instances */
404 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
406 struct efi_device_path *efi_dp_from_dev(struct udevice *dev);
407 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
408 /* Create a device node for a block device partition. */
409 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
410 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
412 struct efi_device_path *efi_dp_from_eth(void);
413 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
414 uint64_t start_address,
415 uint64_t end_address);
416 /* Determine the last device path node that is not the end node. */
417 const struct efi_device_path *efi_dp_last_node(
418 const struct efi_device_path *dp);
419 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
420 struct efi_device_path **device_path,
421 struct efi_device_path **file_path);
423 #define EFI_DP_TYPE(_dp, _type, _subtype) \
424 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
425 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
428 * ascii2unicode() - convert ASCII string to UTF-16 string
430 * A zero terminated ASCII string is converted to a zero terminated UTF-16
431 * string. The output buffer must be preassigned.
433 * @unicode: preassigned output buffer for UTF-16 string
434 * @ascii: ASCII string to be converted
436 static inline void ascii2unicode(u16 *unicode, const char *ascii)
439 *(unicode++) = *(ascii++);
443 static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
445 return memcmp(g1, g2, sizeof(efi_guid_t));
449 * Use these to indicate that your code / data should go into the EFI runtime
450 * section and thus still be available when the OS is running
452 #define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
453 #define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
455 /* Update CRC32 in table header */
456 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);
458 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
459 * to make it available at runtime */
460 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
462 /* Boards may provide the functions below to implement RTS functionality */
464 void __efi_runtime EFIAPI efi_reset_system(
465 enum efi_reset_type reset_type,
466 efi_status_t reset_status,
467 unsigned long data_size, void *reset_data);
469 /* Architecture specific initialization of the EFI subsystem */
470 efi_status_t efi_reset_system_init(void);
472 efi_status_t __efi_runtime EFIAPI efi_get_time(
473 struct efi_time *time,
474 struct efi_time_cap *capabilities);
476 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
478 * Entry point for the tests of the EFI API.
479 * It is called by 'bootefi selftest'
481 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
482 struct efi_system_table *systab);
485 efi_status_t EFIAPI efi_get_variable(u16 *variable_name, efi_guid_t *vendor,
486 u32 *attributes, efi_uintn_t *data_size,
488 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
491 efi_status_t EFIAPI efi_set_variable(u16 *variable_name, efi_guid_t *vendor,
492 u32 attributes, efi_uintn_t data_size,
495 void *efi_bootmgr_load(struct efi_device_path **device_path,
496 struct efi_device_path **file_path);
498 #else /* CONFIG_IS_ENABLED(EFI_LOADER) */
500 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
501 #define __efi_runtime_data
502 #define __efi_runtime
503 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
508 /* No loader configured, stub out EFI_ENTRY */
509 static inline void efi_restore_gd(void) { }
510 static inline void efi_set_bootdev(const char *dev, const char *devnr,
511 const char *path) { }
512 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
513 static inline void efi_print_image_infos(void *pc) { }
515 #endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
517 #endif /* _EFI_LOADER_H */