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1 | /* | |
2 | * EFI application loader | |
3 | * | |
4 | * Copyright (c) 2016 Alexander Graf | |
5 | * | |
6 | * SPDX-License-Identifier: GPL-2.0+ | |
7 | */ | |
8 | ||
9 | #ifndef _EFI_LOADER_H | |
10 | #define _EFI_LOADER_H 1 | |
11 | ||
12 | #include <common.h> | |
13 | #include <part_efi.h> | |
14 | #include <efi_api.h> | |
15 | ||
16 | /* No need for efi loader support in SPL */ | |
17 | #if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD) | |
18 | ||
19 | #include <linux/list.h> | |
20 | ||
21 | int __efi_entry_check(void); | |
22 | int __efi_exit_check(void); | |
23 | const char *__efi_nesting(void); | |
24 | const char *__efi_nesting_inc(void); | |
25 | const char *__efi_nesting_dec(void); | |
26 | ||
27 | /* | |
28 | * Enter the u-boot world from UEFI: | |
29 | */ | |
30 | #define EFI_ENTRY(format, ...) do { \ | |
31 | assert(__efi_entry_check()); \ | |
32 | debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \ | |
33 | __func__, ##__VA_ARGS__); \ | |
34 | } while(0) | |
35 | ||
36 | /* | |
37 | * Exit the u-boot world back to UEFI: | |
38 | */ | |
39 | #define EFI_EXIT(ret) ({ \ | |
40 | typeof(ret) _r = ret; \ | |
41 | debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \ | |
42 | __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \ | |
43 | assert(__efi_exit_check()); \ | |
44 | _r; \ | |
45 | }) | |
46 | ||
47 | /* | |
48 | * Call non-void UEFI function from u-boot and retrieve return value: | |
49 | */ | |
50 | #define EFI_CALL(exp) ({ \ | |
51 | debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \ | |
52 | assert(__efi_exit_check()); \ | |
53 | typeof(exp) _r = exp; \ | |
54 | assert(__efi_entry_check()); \ | |
55 | debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \ | |
56 | (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \ | |
57 | _r; \ | |
58 | }) | |
59 | ||
60 | /* | |
61 | * Call void UEFI function from u-boot: | |
62 | */ | |
63 | #define EFI_CALL_VOID(exp) do { \ | |
64 | debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \ | |
65 | assert(__efi_exit_check()); \ | |
66 | exp; \ | |
67 | assert(__efi_entry_check()); \ | |
68 | debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \ | |
69 | } while(0) | |
70 | ||
71 | /* | |
72 | * Write an indented message with EFI prefix | |
73 | */ | |
74 | #define EFI_PRINT(format, ...) ({ \ | |
75 | debug("%sEFI: " format, __efi_nesting(), \ | |
76 | ##__VA_ARGS__); \ | |
77 | }) | |
78 | ||
79 | extern struct efi_runtime_services efi_runtime_services; | |
80 | extern struct efi_system_table systab; | |
81 | ||
82 | extern struct efi_simple_text_output_protocol efi_con_out; | |
83 | extern struct efi_simple_input_interface efi_con_in; | |
84 | extern struct efi_console_control_protocol efi_console_control; | |
85 | extern const struct efi_device_path_to_text_protocol efi_device_path_to_text; | |
86 | ||
87 | uint16_t *efi_dp_str(struct efi_device_path *dp); | |
88 | ||
89 | /* GUID of the EFI_BLOCK_IO_PROTOCOL */ | |
90 | extern const efi_guid_t efi_block_io_guid; | |
91 | extern const efi_guid_t efi_global_variable_guid; | |
92 | extern const efi_guid_t efi_guid_console_control; | |
93 | extern const efi_guid_t efi_guid_device_path; | |
94 | /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */ | |
95 | extern const efi_guid_t efi_guid_driver_binding_protocol; | |
96 | extern const efi_guid_t efi_guid_loaded_image; | |
97 | extern const efi_guid_t efi_guid_device_path_to_text_protocol; | |
98 | extern const efi_guid_t efi_simple_file_system_protocol_guid; | |
99 | extern const efi_guid_t efi_file_info_guid; | |
100 | ||
101 | extern unsigned int __efi_runtime_start, __efi_runtime_stop; | |
102 | extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop; | |
103 | ||
104 | /* | |
105 | * When a protocol is opened a open protocol info entry is created. | |
106 | * These are maintained in a list. | |
107 | */ | |
108 | struct efi_open_protocol_info_item { | |
109 | /* Link to the list of open protocol info entries of a protocol */ | |
110 | struct list_head link; | |
111 | struct efi_open_protocol_info_entry info; | |
112 | }; | |
113 | ||
114 | /* | |
115 | * When the UEFI payload wants to open a protocol on an object to get its | |
116 | * interface (usually a struct with callback functions), this struct maps the | |
117 | * protocol GUID to the respective protocol interface | |
118 | */ | |
119 | struct efi_handler { | |
120 | /* Link to the list of protocols of a handle */ | |
121 | struct list_head link; | |
122 | const efi_guid_t *guid; | |
123 | void *protocol_interface; | |
124 | /* Link to the list of open protocol info items */ | |
125 | struct list_head open_infos; | |
126 | }; | |
127 | ||
128 | /* | |
129 | * UEFI has a poor man's OO model where one "object" can be polymorphic and have | |
130 | * multiple different protocols (classes) attached to it. | |
131 | * | |
132 | * This struct is the parent struct for all of our actual implementation objects | |
133 | * that can include it to make themselves an EFI object | |
134 | */ | |
135 | struct efi_object { | |
136 | /* Every UEFI object is part of a global object list */ | |
137 | struct list_head link; | |
138 | /* The list of protocols */ | |
139 | struct list_head protocols; | |
140 | /* The object spawner can either use this for data or as identifier */ | |
141 | void *handle; | |
142 | }; | |
143 | ||
144 | /** | |
145 | * struct efi_event | |
146 | * | |
147 | * @type: Type of event, see efi_create_event | |
148 | * @notify_tpl: Task priority level of notifications | |
149 | * @trigger_time: Period of the timer | |
150 | * @trigger_next: Next time to trigger the timer | |
151 | * @nofify_function: Function to call when the event is triggered | |
152 | * @notify_context: Data to be passed to the notify function | |
153 | * @trigger_type: Type of timer, see efi_set_timer | |
154 | * @queued: The notification function is queued | |
155 | * @signaled: The event occurred. The event is in the signaled state. | |
156 | */ | |
157 | struct efi_event { | |
158 | uint32_t type; | |
159 | efi_uintn_t notify_tpl; | |
160 | void (EFIAPI *notify_function)(struct efi_event *event, void *context); | |
161 | void *notify_context; | |
162 | u64 trigger_next; | |
163 | u64 trigger_time; | |
164 | enum efi_timer_delay trigger_type; | |
165 | bool is_queued; | |
166 | bool is_signaled; | |
167 | }; | |
168 | ||
169 | ||
170 | /* This list contains all UEFI objects we know of */ | |
171 | extern struct list_head efi_obj_list; | |
172 | ||
173 | /* Called by bootefi to make console interface available */ | |
174 | int efi_console_register(void); | |
175 | /* Called by bootefi to make all disk storage accessible as EFI objects */ | |
176 | int efi_disk_register(void); | |
177 | /* Create handles and protocols for the partitions of a block device */ | |
178 | int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc, | |
179 | const char *if_typename, int diskid, | |
180 | const char *pdevname); | |
181 | /* Called by bootefi to make GOP (graphical) interface available */ | |
182 | int efi_gop_register(void); | |
183 | /* Called by bootefi to make the network interface available */ | |
184 | int efi_net_register(void); | |
185 | /* Called by bootefi to make the watchdog available */ | |
186 | int efi_watchdog_register(void); | |
187 | /* Called by bootefi to make SMBIOS tables available */ | |
188 | void efi_smbios_register(void); | |
189 | ||
190 | struct efi_simple_file_system_protocol * | |
191 | efi_fs_from_path(struct efi_device_path *fp); | |
192 | ||
193 | /* Called by networking code to memorize the dhcp ack package */ | |
194 | void efi_net_set_dhcp_ack(void *pkt, int len); | |
195 | /* Called by efi_set_watchdog_timer to reset the timer */ | |
196 | efi_status_t efi_set_watchdog(unsigned long timeout); | |
197 | ||
198 | /* Called from places to check whether a timer expired */ | |
199 | void efi_timer_check(void); | |
200 | /* PE loader implementation */ | |
201 | void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info); | |
202 | /* Called once to store the pristine gd pointer */ | |
203 | void efi_save_gd(void); | |
204 | /* Special case handler for error/abort that just tries to dtrt to get | |
205 | * back to u-boot world */ | |
206 | void efi_restore_gd(void); | |
207 | /* Call this to relocate the runtime section to an address space */ | |
208 | void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map); | |
209 | /* Call this to set the current device name */ | |
210 | void efi_set_bootdev(const char *dev, const char *devnr, const char *path); | |
211 | /* Add a new object to the object list. */ | |
212 | void efi_add_handle(struct efi_object *obj); | |
213 | /* Create handle */ | |
214 | efi_status_t efi_create_handle(efi_handle_t *handle); | |
215 | /* Delete handle */ | |
216 | void efi_delete_handle(struct efi_object *obj); | |
217 | /* Call this to validate a handle and find the EFI object for it */ | |
218 | struct efi_object *efi_search_obj(const efi_handle_t handle); | |
219 | /* Find a protocol on a handle */ | |
220 | efi_status_t efi_search_protocol(const efi_handle_t handle, | |
221 | const efi_guid_t *protocol_guid, | |
222 | struct efi_handler **handler); | |
223 | /* Install new protocol on a handle */ | |
224 | efi_status_t efi_add_protocol(const efi_handle_t handle, | |
225 | const efi_guid_t *protocol, | |
226 | void *protocol_interface); | |
227 | /* Delete protocol from a handle */ | |
228 | efi_status_t efi_remove_protocol(const efi_handle_t handle, | |
229 | const efi_guid_t *protocol, | |
230 | void *protocol_interface); | |
231 | /* Delete all protocols from a handle */ | |
232 | efi_status_t efi_remove_all_protocols(const efi_handle_t handle); | |
233 | /* Call this to create an event */ | |
234 | efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl, | |
235 | void (EFIAPI *notify_function) ( | |
236 | struct efi_event *event, | |
237 | void *context), | |
238 | void *notify_context, struct efi_event **event); | |
239 | /* Call this to set a timer */ | |
240 | efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type, | |
241 | uint64_t trigger_time); | |
242 | /* Call this to signal an event */ | |
243 | void efi_signal_event(struct efi_event *event, bool check_tpl); | |
244 | ||
245 | /* open file system: */ | |
246 | struct efi_simple_file_system_protocol *efi_simple_file_system( | |
247 | struct blk_desc *desc, int part, struct efi_device_path *dp); | |
248 | ||
249 | /* open file from device-path: */ | |
250 | struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp); | |
251 | ||
252 | ||
253 | /* Generic EFI memory allocator, call this to get memory */ | |
254 | void *efi_alloc(uint64_t len, int memory_type); | |
255 | /* More specific EFI memory allocator, called by EFI payloads */ | |
256 | efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages, | |
257 | uint64_t *memory); | |
258 | /* EFI memory free function. */ | |
259 | efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages); | |
260 | /* EFI memory allocator for small allocations */ | |
261 | efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size, | |
262 | void **buffer); | |
263 | /* EFI pool memory free function. */ | |
264 | efi_status_t efi_free_pool(void *buffer); | |
265 | /* Returns the EFI memory map */ | |
266 | efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size, | |
267 | struct efi_mem_desc *memory_map, | |
268 | efi_uintn_t *map_key, | |
269 | efi_uintn_t *descriptor_size, | |
270 | uint32_t *descriptor_version); | |
271 | /* Adds a range into the EFI memory map */ | |
272 | uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type, | |
273 | bool overlap_only_ram); | |
274 | /* Called by board init to initialize the EFI drivers */ | |
275 | int efi_driver_init(void); | |
276 | /* Called by board init to initialize the EFI memory map */ | |
277 | int efi_memory_init(void); | |
278 | /* Adds new or overrides configuration table entry to the system table */ | |
279 | efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table); | |
280 | /* Sets up a loaded image */ | |
281 | efi_status_t efi_setup_loaded_image( | |
282 | struct efi_loaded_image *info, struct efi_object *obj, | |
283 | struct efi_device_path *device_path, | |
284 | struct efi_device_path *file_path); | |
285 | efi_status_t efi_load_image_from_path(struct efi_device_path *file_path, | |
286 | void **buffer); | |
287 | ||
288 | #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER | |
289 | extern void *efi_bounce_buffer; | |
290 | #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024) | |
291 | #endif | |
292 | ||
293 | ||
294 | struct efi_device_path *efi_dp_next(const struct efi_device_path *dp); | |
295 | int efi_dp_match(const struct efi_device_path *a, | |
296 | const struct efi_device_path *b); | |
297 | struct efi_object *efi_dp_find_obj(struct efi_device_path *dp, | |
298 | struct efi_device_path **rem); | |
299 | unsigned efi_dp_size(const struct efi_device_path *dp); | |
300 | struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp); | |
301 | struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1, | |
302 | const struct efi_device_path *dp2); | |
303 | struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp, | |
304 | const struct efi_device_path *node); | |
305 | ||
306 | ||
307 | struct efi_device_path *efi_dp_from_dev(struct udevice *dev); | |
308 | struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part); | |
309 | /* Create a device node for a block device partition. */ | |
310 | struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part); | |
311 | struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part, | |
312 | const char *path); | |
313 | struct efi_device_path *efi_dp_from_eth(void); | |
314 | struct efi_device_path *efi_dp_from_mem(uint32_t mem_type, | |
315 | uint64_t start_address, | |
316 | uint64_t end_address); | |
317 | /* Determine the last device path node that is not the end node. */ | |
318 | const struct efi_device_path *efi_dp_last_node( | |
319 | const struct efi_device_path *dp); | |
320 | efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path, | |
321 | struct efi_device_path **device_path, | |
322 | struct efi_device_path **file_path); | |
323 | ||
324 | #define EFI_DP_TYPE(_dp, _type, _subtype) \ | |
325 | (((_dp)->type == DEVICE_PATH_TYPE_##_type) && \ | |
326 | ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype)) | |
327 | ||
328 | /* Convert strings from normal C strings to uEFI strings */ | |
329 | static inline void ascii2unicode(u16 *unicode, const char *ascii) | |
330 | { | |
331 | while (*ascii) | |
332 | *(unicode++) = *(ascii++); | |
333 | } | |
334 | ||
335 | static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2) | |
336 | { | |
337 | return memcmp(g1, g2, sizeof(efi_guid_t)); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Use these to indicate that your code / data should go into the EFI runtime | |
342 | * section and thus still be available when the OS is running | |
343 | */ | |
344 | #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data"))) | |
345 | #define __efi_runtime __attribute__ ((section ("efi_runtime_text"))) | |
346 | ||
347 | /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region | |
348 | * to make it available at runtime */ | |
349 | void efi_add_runtime_mmio(void *mmio_ptr, u64 len); | |
350 | ||
351 | /* Boards may provide the functions below to implement RTS functionality */ | |
352 | ||
353 | void __efi_runtime EFIAPI efi_reset_system( | |
354 | enum efi_reset_type reset_type, | |
355 | efi_status_t reset_status, | |
356 | unsigned long data_size, void *reset_data); | |
357 | void efi_reset_system_init(void); | |
358 | ||
359 | efi_status_t __efi_runtime EFIAPI efi_get_time( | |
360 | struct efi_time *time, | |
361 | struct efi_time_cap *capabilities); | |
362 | void efi_get_time_init(void); | |
363 | ||
364 | #ifdef CONFIG_CMD_BOOTEFI_SELFTEST | |
365 | /* | |
366 | * Entry point for the tests of the EFI API. | |
367 | * It is called by 'bootefi selftest' | |
368 | */ | |
369 | efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle, | |
370 | struct efi_system_table *systab); | |
371 | #endif | |
372 | ||
373 | efi_status_t EFIAPI efi_get_variable(s16 *variable_name, | |
374 | efi_guid_t *vendor, u32 *attributes, | |
375 | unsigned long *data_size, void *data); | |
376 | efi_status_t EFIAPI efi_get_next_variable( | |
377 | unsigned long *variable_name_size, | |
378 | s16 *variable_name, efi_guid_t *vendor); | |
379 | efi_status_t EFIAPI efi_set_variable(s16 *variable_name, | |
380 | efi_guid_t *vendor, u32 attributes, | |
381 | unsigned long data_size, void *data); | |
382 | ||
383 | void *efi_bootmgr_load(struct efi_device_path **device_path, | |
384 | struct efi_device_path **file_path); | |
385 | ||
386 | #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */ | |
387 | ||
388 | /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */ | |
389 | #define __efi_runtime_data | |
390 | #define __efi_runtime | |
391 | static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { } | |
392 | ||
393 | /* No loader configured, stub out EFI_ENTRY */ | |
394 | static inline void efi_restore_gd(void) { } | |
395 | static inline void efi_set_bootdev(const char *dev, const char *devnr, | |
396 | const char *path) { } | |
397 | static inline void efi_net_set_dhcp_ack(void *pkt, int len) { } | |
398 | ||
399 | #endif /* CONFIG_EFI_LOADER && !CONFIG_SPL_BUILD */ | |
400 | ||
401 | #endif /* _EFI_LOADER_H */ |