1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * EFI application loader
4 *
5 * Copyright (c) 2016 Alexander Graf
6 */
7
8 #ifndef _EFI_LOADER_H
9 #define _EFI_LOADER_H 1
10
11 #include <common.h>
12 #include <part_efi.h>
13 #include <efi_api.h>
14
15 /* No need for efi loader support in SPL */
16 #if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD)
17
18 #include <linux/list.h>
19
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);
25
26 /*
27 * Enter the u-boot world from UEFI:
28 */
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__); \
33 } while(0)
34
35 /*
36 * Exit the u-boot world back to UEFI:
37 */
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()); \
43 _r; \
44 })
45
46 /*
47 * Call non-void UEFI function from u-boot and retrieve return value:
48 */
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); \
56 _r; \
57 })
58
59 /*
60 * Call void UEFI function from u-boot:
61 */
62 #define EFI_CALL_VOID(exp) do { \
63 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
64 assert(__efi_exit_check()); \
65 exp; \
66 assert(__efi_entry_check()); \
67 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
68 } while(0)
69
70 /*
71 * Write an indented message with EFI prefix
72 */
73 #define EFI_PRINT(format, ...) ({ \
74 debug("%sEFI: " format, __efi_nesting(), \
75 ##__VA_ARGS__); \
76 })
77
78 #ifdef CONFIG_SYS_CACHELINE_SIZE
79 #define EFI_CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
80 #else
81 /* Just use the greatest cache flush alignment requirement I'm aware of */
82 #define EFI_CACHELINE_SIZE 128
83 #endif
84
85 extern struct efi_runtime_services efi_runtime_services;
86 extern struct efi_system_table systab;
87
88 extern struct efi_simple_text_output_protocol efi_con_out;
89 extern struct efi_simple_input_interface efi_con_in;
90 extern struct efi_console_control_protocol efi_console_control;
91 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
92 /* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */
93 extern const struct efi_device_path_utilities_protocol
94 efi_device_path_utilities;
95
96 uint16_t *efi_dp_str(struct efi_device_path *dp);
97
98 /* GUID of the EFI_BLOCK_IO_PROTOCOL */
99 extern const efi_guid_t efi_block_io_guid;
100 extern const efi_guid_t efi_global_variable_guid;
101 extern const efi_guid_t efi_guid_console_control;
102 extern const efi_guid_t efi_guid_device_path;
103 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
104 extern const efi_guid_t efi_guid_driver_binding_protocol;
105 /* event group ExitBootServices() invoked */
106 extern const efi_guid_t efi_guid_event_group_exit_boot_services;
107 /* event group SetVirtualAddressMap() invoked */
108 extern const efi_guid_t efi_guid_event_group_virtual_address_change;
109 /* event group memory map changed */
110 extern const efi_guid_t efi_guid_event_group_memory_map_change;
111 /* event group boot manager about to boot */
112 extern const efi_guid_t efi_guid_event_group_ready_to_boot;
113 /* event group ResetSystem() invoked (before ExitBootServices) */
114 extern const efi_guid_t efi_guid_event_group_reset_system;
115 /* GUID of the device tree table */
116 extern const efi_guid_t efi_guid_fdt;
117 extern const efi_guid_t efi_guid_loaded_image;
118 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
119 extern const efi_guid_t efi_simple_file_system_protocol_guid;
120 extern const efi_guid_t efi_file_info_guid;
121 /* GUID for file system information */
122 extern const efi_guid_t efi_file_system_info_guid;
123 extern const efi_guid_t efi_guid_device_path_utilities_protocol;
124
125 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
126 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
127
128 /*
129 * When a protocol is opened a open protocol info entry is created.
130 * These are maintained in a list.
131 */
132 struct efi_open_protocol_info_item {
133 /* Link to the list of open protocol info entries of a protocol */
134 struct list_head link;
135 struct efi_open_protocol_info_entry info;
136 };
137
138 /*
139 * When the UEFI payload wants to open a protocol on an object to get its
140 * interface (usually a struct with callback functions), this struct maps the
141 * protocol GUID to the respective protocol interface
142 */
143 struct efi_handler {
144 /* Link to the list of protocols of a handle */
145 struct list_head link;
146 const efi_guid_t *guid;
147 void *protocol_interface;
148 /* Link to the list of open protocol info items */
149 struct list_head open_infos;
150 };
151
152 /*
153 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
154 * multiple different protocols (classes) attached to it.
155 *
156 * This struct is the parent struct for all of our actual implementation objects
157 * that can include it to make themselves an EFI object
158 */
159 struct efi_object {
160 /* Every UEFI object is part of a global object list */
161 struct list_head link;
162 /* The list of protocols */
163 struct list_head protocols;
164 /* The object spawner can either use this for data or as identifier */
165 void *handle;
166 };
167
168 /**
169 * struct efi_event
170 *
171 * @link: Link to list of all events
172 * @type: Type of event, see efi_create_event
173 * @notify_tpl: Task priority level of notifications
174 * @nofify_function: Function to call when the event is triggered
175 * @notify_context: Data to be passed to the notify function
176 * @group: Event group
177 * @trigger_time: Period of the timer
178 * @trigger_next: Next time to trigger the timer
179 * @trigger_type: Type of timer, see efi_set_timer
180 * @is_queued: The notification function is queued
181 * @is_signaled: The event occurred. The event is in the signaled state.
182 */
183 struct efi_event {
184 struct list_head link;
185 uint32_t type;
186 efi_uintn_t notify_tpl;
187 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
188 void *notify_context;
189 const efi_guid_t *group;
190 u64 trigger_next;
191 u64 trigger_time;
192 enum efi_timer_delay trigger_type;
193 bool is_queued;
194 bool is_signaled;
195 };
196
197 /* This list contains all UEFI objects we know of */
198 extern struct list_head efi_obj_list;
199 /* List of all events */
200 extern struct list_head efi_events;
201
202 /* Called by bootefi to make console interface available */
203 int efi_console_register(void);
204 /* Called by bootefi to make all disk storage accessible as EFI objects */
205 efi_status_t efi_disk_register(void);
206 /* Create handles and protocols for the partitions of a block device */
207 int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
208 const char *if_typename, int diskid,
209 const char *pdevname);
210 /* Called by bootefi to make GOP (graphical) interface available */
211 efi_status_t efi_gop_register(void);
212 /* Called by bootefi to make the network interface available */
213 efi_status_t efi_net_register(void);
214 /* Called by bootefi to make the watchdog available */
215 efi_status_t efi_watchdog_register(void);
216 /* Called by bootefi to make SMBIOS tables available */
217 /**
218 * efi_acpi_register() - write out ACPI tables
219 *
220 * Called by bootefi to make ACPI tables available
221 *
222 * @return 0 if OK, -ENOMEM if no memory is available for the tables
223 */
224 efi_status_t efi_acpi_register(void);
225 /**
226 * efi_smbios_register() - write out SMBIOS tables
227 *
228 * Called by bootefi to make SMBIOS tables available
229 *
230 * @return 0 if OK, -ENOMEM if no memory is available for the tables
231 */
232 efi_status_t efi_smbios_register(void);
233
234 struct efi_simple_file_system_protocol *
235 efi_fs_from_path(struct efi_device_path *fp);
236
237 /* Called by networking code to memorize the dhcp ack package */
238 void efi_net_set_dhcp_ack(void *pkt, int len);
239 /* Called by efi_set_watchdog_timer to reset the timer */
240 efi_status_t efi_set_watchdog(unsigned long timeout);
241
242 /* Called from places to check whether a timer expired */
243 void efi_timer_check(void);
244 /* PE loader implementation */
245 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
246 /* Called once to store the pristine gd pointer */
247 void efi_save_gd(void);
248 /* Special case handler for error/abort that just tries to dtrt to get
249 * back to u-boot world */
250 void efi_restore_gd(void);
251 /* Call this to relocate the runtime section to an address space */
252 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
253 /* Call this to set the current device name */
254 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
255 /* Add a new object to the object list. */
256 void efi_add_handle(struct efi_object *obj);
257 /* Create handle */
258 efi_status_t efi_create_handle(efi_handle_t *handle);
259 /* Delete handle */
260 void efi_delete_handle(struct efi_object *obj);
261 /* Call this to validate a handle and find the EFI object for it */
262 struct efi_object *efi_search_obj(const efi_handle_t handle);
263 /* Find a protocol on a handle */
264 efi_status_t efi_search_protocol(const efi_handle_t handle,
265 const efi_guid_t *protocol_guid,
266 struct efi_handler **handler);
267 /* Install new protocol on a handle */
268 efi_status_t efi_add_protocol(const efi_handle_t handle,
269 const efi_guid_t *protocol,
270 void *protocol_interface);
271 /* Delete protocol from a handle */
272 efi_status_t efi_remove_protocol(const efi_handle_t handle,
273 const efi_guid_t *protocol,
274 void *protocol_interface);
275 /* Delete all protocols from a handle */
276 efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
277 /* Call this to create an event */
278 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
279 void (EFIAPI *notify_function) (
280 struct efi_event *event,
281 void *context),
282 void *notify_context, efi_guid_t *group,
283 struct efi_event **event);
284 /* Call this to set a timer */
285 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
286 uint64_t trigger_time);
287 /* Call this to signal an event */
288 void efi_signal_event(struct efi_event *event, bool check_tpl);
289
290 /* open file system: */
291 struct efi_simple_file_system_protocol *efi_simple_file_system(
292 struct blk_desc *desc, int part, struct efi_device_path *dp);
293
294 /* open file from device-path: */
295 struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
296
297
298 /* Generic EFI memory allocator, call this to get memory */
299 void *efi_alloc(uint64_t len, int memory_type);
300 /* More specific EFI memory allocator, called by EFI payloads */
301 efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
302 uint64_t *memory);
303 /* EFI memory free function. */
304 efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
305 /* EFI memory allocator for small allocations */
306 efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
307 void **buffer);
308 /* EFI pool memory free function. */
309 efi_status_t efi_free_pool(void *buffer);
310 /* Returns the EFI memory map */
311 efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
312 struct efi_mem_desc *memory_map,
313 efi_uintn_t *map_key,
314 efi_uintn_t *descriptor_size,
315 uint32_t *descriptor_version);
316 /* Adds a range into the EFI memory map */
317 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
318 bool overlap_only_ram);
319 /* Called by board init to initialize the EFI drivers */
320 efi_status_t efi_driver_init(void);
321 /* Called by board init to initialize the EFI memory map */
322 int efi_memory_init(void);
323 /* Adds new or overrides configuration table entry to the system table */
324 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
325 /* Sets up a loaded image */
326 efi_status_t efi_setup_loaded_image(
327 struct efi_loaded_image *info, struct efi_object *obj,
328 struct efi_device_path *device_path,
329 struct efi_device_path *file_path);
330 efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
331 void **buffer);
332 /* Print information about a loaded image */
333 efi_status_t efi_print_image_info(struct efi_loaded_image *image, void *pc);
334 /* Print information about all loaded images */
335 void efi_print_image_infos(void *pc);
336
337 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
338 extern void *efi_bounce_buffer;
339 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
340 #endif
341
342
343 struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
344 int efi_dp_match(const struct efi_device_path *a,
345 const struct efi_device_path *b);
346 struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
347 struct efi_device_path **rem);
348 /* get size of the first device path instance excluding end node */
349 efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
350 /* size of multi-instance device path excluding end node */
351 efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
352 struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
353 struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
354 const struct efi_device_path *dp2);
355 struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
356 const struct efi_device_path *node);
357 /* Create a device path node of given type, sub-type, length */
358 struct efi_device_path *efi_dp_create_device_node(const u8 type,
359 const u8 sub_type,
360 const u16 length);
361 /* Append device path instance */
362 struct efi_device_path *efi_dp_append_instance(
363 const struct efi_device_path *dp,
364 const struct efi_device_path *dpi);
365 /* Get next device path instance */
366 struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
367 efi_uintn_t *size);
368 /* Check if a device path contains muliple instances */
369 bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
370
371 struct efi_device_path *efi_dp_from_dev(struct udevice *dev);
372 struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
373 /* Create a device node for a block device partition. */
374 struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
375 struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
376 const char *path);
377 struct efi_device_path *efi_dp_from_eth(void);
378 struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
379 uint64_t start_address,
380 uint64_t end_address);
381 /* Determine the last device path node that is not the end node. */
382 const struct efi_device_path *efi_dp_last_node(
383 const struct efi_device_path *dp);
384 efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
385 struct efi_device_path **device_path,
386 struct efi_device_path **file_path);
387
388 #define EFI_DP_TYPE(_dp, _type, _subtype) \
389 (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
390 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
391
392 /* Convert strings from normal C strings to uEFI strings */
ascii2unicode(u16 * unicode,const char * ascii)393 static inline void ascii2unicode(u16 *unicode, const char *ascii)
394 {
395 while (*ascii)
396 *(unicode++) = *(ascii++);
397 *unicode = 0;
398 }
399
guidcmp(const efi_guid_t * g1,const efi_guid_t * g2)400 static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
401 {
402 return memcmp(g1, g2, sizeof(efi_guid_t));
403 }
404
405 /*
406 * Use these to indicate that your code / data should go into the EFI runtime
407 * section and thus still be available when the OS is running
408 */
409 #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data")))
410 #define __efi_runtime __attribute__ ((section ("efi_runtime_text")))
411
412 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
413 * to make it available at runtime */
414 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len);
415
416 /* Boards may provide the functions below to implement RTS functionality */
417
418 void __efi_runtime EFIAPI efi_reset_system(
419 enum efi_reset_type reset_type,
420 efi_status_t reset_status,
421 unsigned long data_size, void *reset_data);
422
423 /* Architecture specific initialization of the EFI subsystem */
424 efi_status_t efi_reset_system_init(void);
425
426 efi_status_t __efi_runtime EFIAPI efi_get_time(
427 struct efi_time *time,
428 struct efi_time_cap *capabilities);
429 efi_status_t efi_get_time_init(void);
430
431 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
432 /*
433 * Entry point for the tests of the EFI API.
434 * It is called by 'bootefi selftest'
435 */
436 efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
437 struct efi_system_table *systab);
438 #endif
439
440 efi_status_t EFIAPI efi_get_variable(u16 *variable_name, efi_guid_t *vendor,
441 u32 *attributes, efi_uintn_t *data_size,
442 void *data);
443 efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size,
444 u16 *variable_name,
445 efi_guid_t *vendor);
446 efi_status_t EFIAPI efi_set_variable(u16 *variable_name, efi_guid_t *vendor,
447 u32 attributes, efi_uintn_t data_size,
448 void *data);
449
450 void *efi_bootmgr_load(struct efi_device_path **device_path,
451 struct efi_device_path **file_path);
452
453 #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
454
455 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
456 #define __efi_runtime_data
457 #define __efi_runtime
efi_add_runtime_mmio(void * mmio_ptr,u64 len)458 static inline efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
459 {
460 return EFI_SUCCESS;
461 }
462
463 /* No loader configured, stub out EFI_ENTRY */
efi_restore_gd(void)464 static inline void efi_restore_gd(void) { }
efi_set_bootdev(const char * dev,const char * devnr,const char * path)465 static inline void efi_set_bootdev(const char *dev, const char *devnr,
466 const char *path) { }
efi_net_set_dhcp_ack(void * pkt,int len)467 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
efi_print_image_infos(void * pc)468 static inline void efi_print_image_infos(void *pc) { }
469
470 #endif /* CONFIG_EFI_LOADER && !CONFIG_SPL_BUILD */
471
472 #endif /* _EFI_LOADER_H */
473