1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
4 #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H
5
6 #include <linux/compiler.h>
7 #include <linux/efi.h>
8 #include <linux/kernel.h>
9 #include <linux/kern_levels.h>
10 #include <linux/types.h>
11 #include <asm/efi.h>
12
13 /*
14 * __init annotations should not be used in the EFI stub, since the code is
15 * either included in the decompressor (x86, ARM) where they have no effect,
16 * or the whole stub is __init annotated at the section level (arm64), by
17 * renaming the sections, in which case the __init annotation will be
18 * redundant, and will result in section names like .init.init.text, and our
19 * linker script does not expect that.
20 */
21 #undef __init
22
23 /*
24 * Allow the platform to override the allocation granularity: this allows
25 * systems that have the capability to run with a larger page size to deal
26 * with the allocations for initrd and fdt more efficiently.
27 */
28 #ifndef EFI_ALLOC_ALIGN
29 #define EFI_ALLOC_ALIGN EFI_PAGE_SIZE
30 #endif
31
32 #ifndef EFI_ALLOC_LIMIT
33 #define EFI_ALLOC_LIMIT ULONG_MAX
34 #endif
35
36 extern bool efi_no5lvl;
37 extern bool efi_nochunk;
38 extern bool efi_nokaslr;
39 extern int efi_loglevel;
40 extern bool efi_novamap;
41
42 extern const efi_system_table_t *efi_system_table;
43
44 typedef union efi_dxe_services_table efi_dxe_services_table_t;
45 extern const efi_dxe_services_table_t *efi_dxe_table;
46
47 efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
48 efi_system_table_t *sys_table_arg);
49
50 #ifndef ARCH_HAS_EFISTUB_WRAPPERS
51
52 #define efi_is_native() (true)
53 #define efi_table_attr(inst, attr) (inst)->attr
54 #define efi_fn_call(inst, func, ...) (inst)->func(__VA_ARGS__)
55
56 #endif
57
58 #define efi_call_proto(inst, func, ...) ({ \
59 __typeof__(inst) __inst = (inst); \
60 efi_fn_call(__inst, func, __inst, ##__VA_ARGS__); \
61 })
62 #define efi_bs_call(func, ...) \
63 efi_fn_call(efi_table_attr(efi_system_table, boottime), func, ##__VA_ARGS__)
64 #define efi_rt_call(func, ...) \
65 efi_fn_call(efi_table_attr(efi_system_table, runtime), func, ##__VA_ARGS__)
66 #define efi_dxe_call(func, ...) \
67 efi_fn_call(efi_dxe_table, func, ##__VA_ARGS__)
68
69 #define efi_info(fmt, ...) \
70 efi_printk(KERN_INFO fmt, ##__VA_ARGS__)
71 #define efi_warn(fmt, ...) \
72 efi_printk(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__)
73 #define efi_err(fmt, ...) \
74 efi_printk(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)
75 #define efi_debug(fmt, ...) \
76 efi_printk(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)
77
78 #define efi_printk_once(fmt, ...) \
79 ({ \
80 static bool __print_once; \
81 bool __ret_print_once = !__print_once; \
82 \
83 if (!__print_once) { \
84 __print_once = true; \
85 efi_printk(fmt, ##__VA_ARGS__); \
86 } \
87 __ret_print_once; \
88 })
89
90 #define efi_info_once(fmt, ...) \
91 efi_printk_once(KERN_INFO fmt, ##__VA_ARGS__)
92 #define efi_warn_once(fmt, ...) \
93 efi_printk_once(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__)
94 #define efi_err_once(fmt, ...) \
95 efi_printk_once(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)
96 #define efi_debug_once(fmt, ...) \
97 efi_printk_once(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)
98
99 /* Helper macros for the usual case of using simple C variables: */
100 #ifndef fdt_setprop_inplace_var
101 #define fdt_setprop_inplace_var(fdt, node_offset, name, var) \
102 fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var))
103 #endif
104
105 #ifndef fdt_setprop_var
106 #define fdt_setprop_var(fdt, node_offset, name, var) \
107 fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var))
108 #endif
109
110 #define get_efi_var(name, vendor, ...) \
111 efi_rt_call(get_variable, (efi_char16_t *)(name), \
112 (efi_guid_t *)(vendor), __VA_ARGS__)
113
114 #define set_efi_var(name, vendor, ...) \
115 efi_rt_call(set_variable, (efi_char16_t *)(name), \
116 (efi_guid_t *)(vendor), __VA_ARGS__)
117
118 #define efi_get_handle_at(array, idx) \
119 (efi_is_native() ? (array)[idx] \
120 : (efi_handle_t)(unsigned long)((u32 *)(array))[idx])
121
122 #define efi_get_handle_num(size) \
123 ((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32)))
124
125 #define for_each_efi_handle(handle, array, size, i) \
126 for (i = 0; \
127 i < efi_get_handle_num(size) && \
128 ((handle = efi_get_handle_at((array), i)) || true); \
129 i++)
130
131 static inline
efi_set_u64_split(u64 data,u32 * lo,u32 * hi)132 void efi_set_u64_split(u64 data, u32 *lo, u32 *hi)
133 {
134 *lo = lower_32_bits(data);
135 *hi = upper_32_bits(data);
136 }
137
138 /*
139 * Allocation types for calls to boottime->allocate_pages.
140 */
141 #define EFI_ALLOCATE_ANY_PAGES 0
142 #define EFI_ALLOCATE_MAX_ADDRESS 1
143 #define EFI_ALLOCATE_ADDRESS 2
144 #define EFI_MAX_ALLOCATE_TYPE 3
145
146 /*
147 * The type of search to perform when calling boottime->locate_handle
148 */
149 #define EFI_LOCATE_ALL_HANDLES 0
150 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
151 #define EFI_LOCATE_BY_PROTOCOL 2
152
153 /*
154 * boottime->stall takes the time period in microseconds
155 */
156 #define EFI_USEC_PER_SEC 1000000
157
158 /*
159 * boottime->set_timer takes the time in 100ns units
160 */
161 #define EFI_100NSEC_PER_USEC ((u64)10)
162
163 /*
164 * An efi_boot_memmap is used by efi_get_memory_map() to return the
165 * EFI memory map in a dynamically allocated buffer.
166 *
167 * The buffer allocated for the EFI memory map includes extra room for
168 * a minimum of EFI_MMAP_NR_SLACK_SLOTS additional EFI memory descriptors.
169 * This facilitates the reuse of the EFI memory map buffer when a second
170 * call to ExitBootServices() is needed because of intervening changes to
171 * the EFI memory map. Other related structures, e.g. x86 e820ext, need
172 * to factor in this headroom requirement as well.
173 */
174 #define EFI_MMAP_NR_SLACK_SLOTS 8
175
176 typedef struct efi_generic_dev_path efi_device_path_protocol_t;
177
178 union efi_device_path_to_text_protocol {
179 struct {
180 efi_char16_t *(__efiapi *convert_device_node_to_text)(
181 const efi_device_path_protocol_t *,
182 bool, bool);
183 efi_char16_t *(__efiapi *convert_device_path_to_text)(
184 const efi_device_path_protocol_t *,
185 bool, bool);
186 };
187 struct {
188 u32 convert_device_node_to_text;
189 u32 convert_device_path_to_text;
190 } mixed_mode;
191 };
192
193 typedef union efi_device_path_to_text_protocol efi_device_path_to_text_protocol_t;
194
195 union efi_device_path_from_text_protocol {
196 struct {
197 efi_device_path_protocol_t *
198 (__efiapi *convert_text_to_device_node)(const efi_char16_t *);
199 efi_device_path_protocol_t *
200 (__efiapi *convert_text_to_device_path)(const efi_char16_t *);
201 };
202 struct {
203 u32 convert_text_to_device_node;
204 u32 convert_text_to_device_path;
205 } mixed_mode;
206 };
207
208 typedef union efi_device_path_from_text_protocol efi_device_path_from_text_protocol_t;
209
210 typedef void *efi_event_t;
211 /* Note that notifications won't work in mixed mode */
212 typedef void (__efiapi *efi_event_notify_t)(efi_event_t, void *);
213
214 #define EFI_EVT_TIMER 0x80000000U
215 #define EFI_EVT_RUNTIME 0x40000000U
216 #define EFI_EVT_NOTIFY_WAIT 0x00000100U
217 #define EFI_EVT_NOTIFY_SIGNAL 0x00000200U
218
219 /**
220 * efi_set_event_at() - add event to events array
221 *
222 * @events: array of UEFI events
223 * @ids: index where to put the event in the array
224 * @event: event to add to the aray
225 *
226 * boottime->wait_for_event() takes an array of events as input.
227 * Provide a helper to set it up correctly for mixed mode.
228 */
229 static inline
efi_set_event_at(efi_event_t * events,size_t idx,efi_event_t event)230 void efi_set_event_at(efi_event_t *events, size_t idx, efi_event_t event)
231 {
232 if (efi_is_native())
233 events[idx] = event;
234 else
235 ((u32 *)events)[idx] = (u32)(unsigned long)event;
236 }
237
238 #define EFI_TPL_APPLICATION 4
239 #define EFI_TPL_CALLBACK 8
240 #define EFI_TPL_NOTIFY 16
241 #define EFI_TPL_HIGH_LEVEL 31
242
243 typedef enum {
244 EfiTimerCancel,
245 EfiTimerPeriodic,
246 EfiTimerRelative
247 } EFI_TIMER_DELAY;
248
249 /*
250 * EFI Boot Services table
251 */
252 union efi_boot_services {
253 struct {
254 efi_table_hdr_t hdr;
255 void *raise_tpl;
256 void *restore_tpl;
257 efi_status_t (__efiapi *allocate_pages)(int, int, unsigned long,
258 efi_physical_addr_t *);
259 efi_status_t (__efiapi *free_pages)(efi_physical_addr_t,
260 unsigned long);
261 efi_status_t (__efiapi *get_memory_map)(unsigned long *, void *,
262 unsigned long *,
263 unsigned long *, u32 *);
264 efi_status_t (__efiapi *allocate_pool)(int, unsigned long,
265 void **);
266 efi_status_t (__efiapi *free_pool)(void *);
267 efi_status_t (__efiapi *create_event)(u32, unsigned long,
268 efi_event_notify_t, void *,
269 efi_event_t *);
270 efi_status_t (__efiapi *set_timer)(efi_event_t,
271 EFI_TIMER_DELAY, u64);
272 efi_status_t (__efiapi *wait_for_event)(unsigned long,
273 efi_event_t *,
274 unsigned long *);
275 void *signal_event;
276 efi_status_t (__efiapi *close_event)(efi_event_t);
277 void *check_event;
278 void *install_protocol_interface;
279 void *reinstall_protocol_interface;
280 void *uninstall_protocol_interface;
281 efi_status_t (__efiapi *handle_protocol)(efi_handle_t,
282 efi_guid_t *, void **);
283 void *__reserved;
284 void *register_protocol_notify;
285 efi_status_t (__efiapi *locate_handle)(int, efi_guid_t *,
286 void *, unsigned long *,
287 efi_handle_t *);
288 efi_status_t (__efiapi *locate_device_path)(efi_guid_t *,
289 efi_device_path_protocol_t **,
290 efi_handle_t *);
291 efi_status_t (__efiapi *install_configuration_table)(efi_guid_t *,
292 void *);
293 efi_status_t (__efiapi *load_image)(bool, efi_handle_t,
294 efi_device_path_protocol_t *,
295 void *, unsigned long,
296 efi_handle_t *);
297 efi_status_t (__efiapi *start_image)(efi_handle_t, unsigned long *,
298 efi_char16_t **);
299 efi_status_t __noreturn (__efiapi *exit)(efi_handle_t,
300 efi_status_t,
301 unsigned long,
302 efi_char16_t *);
303 efi_status_t (__efiapi *unload_image)(efi_handle_t);
304 efi_status_t (__efiapi *exit_boot_services)(efi_handle_t,
305 unsigned long);
306 void *get_next_monotonic_count;
307 efi_status_t (__efiapi *stall)(unsigned long);
308 void *set_watchdog_timer;
309 void *connect_controller;
310 efi_status_t (__efiapi *disconnect_controller)(efi_handle_t,
311 efi_handle_t,
312 efi_handle_t);
313 void *open_protocol;
314 void *close_protocol;
315 void *open_protocol_information;
316 void *protocols_per_handle;
317 void *locate_handle_buffer;
318 efi_status_t (__efiapi *locate_protocol)(efi_guid_t *, void *,
319 void **);
320 efi_status_t (__efiapi *install_multiple_protocol_interfaces)(efi_handle_t *, ...);
321 efi_status_t (__efiapi *uninstall_multiple_protocol_interfaces)(efi_handle_t, ...);
322 void *calculate_crc32;
323 void (__efiapi *copy_mem)(void *, const void *, unsigned long);
324 void (__efiapi *set_mem)(void *, unsigned long, unsigned char);
325 void *create_event_ex;
326 };
327 struct {
328 efi_table_hdr_t hdr;
329 u32 raise_tpl;
330 u32 restore_tpl;
331 u32 allocate_pages;
332 u32 free_pages;
333 u32 get_memory_map;
334 u32 allocate_pool;
335 u32 free_pool;
336 u32 create_event;
337 u32 set_timer;
338 u32 wait_for_event;
339 u32 signal_event;
340 u32 close_event;
341 u32 check_event;
342 u32 install_protocol_interface;
343 u32 reinstall_protocol_interface;
344 u32 uninstall_protocol_interface;
345 u32 handle_protocol;
346 u32 __reserved;
347 u32 register_protocol_notify;
348 u32 locate_handle;
349 u32 locate_device_path;
350 u32 install_configuration_table;
351 u32 load_image;
352 u32 start_image;
353 u32 exit;
354 u32 unload_image;
355 u32 exit_boot_services;
356 u32 get_next_monotonic_count;
357 u32 stall;
358 u32 set_watchdog_timer;
359 u32 connect_controller;
360 u32 disconnect_controller;
361 u32 open_protocol;
362 u32 close_protocol;
363 u32 open_protocol_information;
364 u32 protocols_per_handle;
365 u32 locate_handle_buffer;
366 u32 locate_protocol;
367 u32 install_multiple_protocol_interfaces;
368 u32 uninstall_multiple_protocol_interfaces;
369 u32 calculate_crc32;
370 u32 copy_mem;
371 u32 set_mem;
372 u32 create_event_ex;
373 } mixed_mode;
374 };
375
376 typedef enum {
377 EfiGcdMemoryTypeNonExistent,
378 EfiGcdMemoryTypeReserved,
379 EfiGcdMemoryTypeSystemMemory,
380 EfiGcdMemoryTypeMemoryMappedIo,
381 EfiGcdMemoryTypePersistent,
382 EfiGcdMemoryTypeMoreReliable,
383 EfiGcdMemoryTypeMaximum
384 } efi_gcd_memory_type_t;
385
386 typedef struct {
387 efi_physical_addr_t base_address;
388 u64 length;
389 u64 capabilities;
390 u64 attributes;
391 efi_gcd_memory_type_t gcd_memory_type;
392 void *image_handle;
393 void *device_handle;
394 } efi_gcd_memory_space_desc_t;
395
396 /*
397 * EFI DXE Services table
398 */
399 union efi_dxe_services_table {
400 struct {
401 efi_table_hdr_t hdr;
402 void *add_memory_space;
403 void *allocate_memory_space;
404 void *free_memory_space;
405 void *remove_memory_space;
406 efi_status_t (__efiapi *get_memory_space_descriptor)(efi_physical_addr_t,
407 efi_gcd_memory_space_desc_t *);
408 efi_status_t (__efiapi *set_memory_space_attributes)(efi_physical_addr_t,
409 u64, u64);
410 void *get_memory_space_map;
411 void *add_io_space;
412 void *allocate_io_space;
413 void *free_io_space;
414 void *remove_io_space;
415 void *get_io_space_descriptor;
416 void *get_io_space_map;
417 void *dispatch;
418 void *schedule;
419 void *trust;
420 void *process_firmware_volume;
421 void *set_memory_space_capabilities;
422 };
423 struct {
424 efi_table_hdr_t hdr;
425 u32 add_memory_space;
426 u32 allocate_memory_space;
427 u32 free_memory_space;
428 u32 remove_memory_space;
429 u32 get_memory_space_descriptor;
430 u32 set_memory_space_attributes;
431 u32 get_memory_space_map;
432 u32 add_io_space;
433 u32 allocate_io_space;
434 u32 free_io_space;
435 u32 remove_io_space;
436 u32 get_io_space_descriptor;
437 u32 get_io_space_map;
438 u32 dispatch;
439 u32 schedule;
440 u32 trust;
441 u32 process_firmware_volume;
442 u32 set_memory_space_capabilities;
443 } mixed_mode;
444 };
445
446 typedef union efi_memory_attribute_protocol efi_memory_attribute_protocol_t;
447
448 union efi_memory_attribute_protocol {
449 struct {
450 efi_status_t (__efiapi *get_memory_attributes)(
451 efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64 *);
452
453 efi_status_t (__efiapi *set_memory_attributes)(
454 efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64);
455
456 efi_status_t (__efiapi *clear_memory_attributes)(
457 efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64);
458 };
459 struct {
460 u32 get_memory_attributes;
461 u32 set_memory_attributes;
462 u32 clear_memory_attributes;
463 } mixed_mode;
464 };
465
466 typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t;
467
468 union efi_uga_draw_protocol {
469 struct {
470 efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *,
471 u32*, u32*, u32*, u32*);
472 void *set_mode;
473 void *blt;
474 };
475 struct {
476 u32 get_mode;
477 u32 set_mode;
478 u32 blt;
479 } mixed_mode;
480 };
481
482 typedef struct {
483 u16 scan_code;
484 efi_char16_t unicode_char;
485 } efi_input_key_t;
486
487 union efi_simple_text_input_protocol {
488 struct {
489 void *reset;
490 efi_status_t (__efiapi *read_keystroke)(efi_simple_text_input_protocol_t *,
491 efi_input_key_t *);
492 efi_event_t wait_for_key;
493 };
494 struct {
495 u32 reset;
496 u32 read_keystroke;
497 u32 wait_for_key;
498 } mixed_mode;
499 };
500
501 efi_status_t efi_wait_for_key(unsigned long usec, efi_input_key_t *key);
502
503 union efi_simple_text_output_protocol {
504 struct {
505 void *reset;
506 efi_status_t (__efiapi *output_string)(efi_simple_text_output_protocol_t *,
507 efi_char16_t *);
508 void *test_string;
509 };
510 struct {
511 u32 reset;
512 u32 output_string;
513 u32 test_string;
514 } mixed_mode;
515 };
516
517 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
518 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
519 #define PIXEL_BIT_MASK 2
520 #define PIXEL_BLT_ONLY 3
521 #define PIXEL_FORMAT_MAX 4
522
523 typedef struct {
524 u32 red_mask;
525 u32 green_mask;
526 u32 blue_mask;
527 u32 reserved_mask;
528 } efi_pixel_bitmask_t;
529
530 typedef struct {
531 u32 version;
532 u32 horizontal_resolution;
533 u32 vertical_resolution;
534 int pixel_format;
535 efi_pixel_bitmask_t pixel_information;
536 u32 pixels_per_scan_line;
537 } efi_graphics_output_mode_info_t;
538
539 typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t;
540
541 union efi_graphics_output_protocol_mode {
542 struct {
543 u32 max_mode;
544 u32 mode;
545 efi_graphics_output_mode_info_t *info;
546 unsigned long size_of_info;
547 efi_physical_addr_t frame_buffer_base;
548 unsigned long frame_buffer_size;
549 };
550 struct {
551 u32 max_mode;
552 u32 mode;
553 u32 info;
554 u32 size_of_info;
555 u64 frame_buffer_base;
556 u32 frame_buffer_size;
557 } mixed_mode;
558 };
559
560 typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t;
561
562 union efi_graphics_output_protocol {
563 struct {
564 efi_status_t (__efiapi *query_mode)(efi_graphics_output_protocol_t *,
565 u32, unsigned long *,
566 efi_graphics_output_mode_info_t **);
567 efi_status_t (__efiapi *set_mode) (efi_graphics_output_protocol_t *, u32);
568 void *blt;
569 efi_graphics_output_protocol_mode_t *mode;
570 };
571 struct {
572 u32 query_mode;
573 u32 set_mode;
574 u32 blt;
575 u32 mode;
576 } mixed_mode;
577 };
578
579 typedef union {
580 struct {
581 u32 revision;
582 efi_handle_t parent_handle;
583 efi_system_table_t *system_table;
584 efi_handle_t device_handle;
585 void *file_path;
586 void *reserved;
587 u32 load_options_size;
588 void *load_options;
589 void *image_base;
590 __aligned_u64 image_size;
591 unsigned int image_code_type;
592 unsigned int image_data_type;
593 efi_status_t (__efiapi *unload)(efi_handle_t image_handle);
594 };
595 struct {
596 u32 revision;
597 u32 parent_handle;
598 u32 system_table;
599 u32 device_handle;
600 u32 file_path;
601 u32 reserved;
602 u32 load_options_size;
603 u32 load_options;
604 u32 image_base;
605 __aligned_u64 image_size;
606 u32 image_code_type;
607 u32 image_data_type;
608 u32 unload;
609 } mixed_mode;
610 } efi_loaded_image_t;
611
612 typedef struct {
613 u64 size;
614 u64 file_size;
615 u64 phys_size;
616 efi_time_t create_time;
617 efi_time_t last_access_time;
618 efi_time_t modification_time;
619 __aligned_u64 attribute;
620 efi_char16_t filename[];
621 } efi_file_info_t;
622
623 typedef union efi_file_protocol efi_file_protocol_t;
624
625 union efi_file_protocol {
626 struct {
627 u64 revision;
628 efi_status_t (__efiapi *open) (efi_file_protocol_t *,
629 efi_file_protocol_t **,
630 efi_char16_t *, u64,
631 u64);
632 efi_status_t (__efiapi *close) (efi_file_protocol_t *);
633 efi_status_t (__efiapi *delete) (efi_file_protocol_t *);
634 efi_status_t (__efiapi *read) (efi_file_protocol_t *,
635 unsigned long *,
636 void *);
637 efi_status_t (__efiapi *write) (efi_file_protocol_t *,
638 unsigned long, void *);
639 efi_status_t (__efiapi *get_position)(efi_file_protocol_t *,
640 u64 *);
641 efi_status_t (__efiapi *set_position)(efi_file_protocol_t *,
642 u64);
643 efi_status_t (__efiapi *get_info) (efi_file_protocol_t *,
644 efi_guid_t *,
645 unsigned long *,
646 void *);
647 efi_status_t (__efiapi *set_info) (efi_file_protocol_t *,
648 efi_guid_t *,
649 unsigned long,
650 void *);
651 efi_status_t (__efiapi *flush) (efi_file_protocol_t *);
652 };
653 struct {
654 u64 revision;
655 u32 open;
656 u32 close;
657 u32 delete;
658 u32 read;
659 u32 write;
660 u32 get_position;
661 u32 set_position;
662 u32 get_info;
663 u32 set_info;
664 u32 flush;
665 } mixed_mode;
666 };
667
668 typedef union efi_simple_file_system_protocol efi_simple_file_system_protocol_t;
669
670 union efi_simple_file_system_protocol {
671 struct {
672 u64 revision;
673 efi_status_t (__efiapi *open_volume)(efi_simple_file_system_protocol_t *,
674 efi_file_protocol_t **);
675 };
676 struct {
677 u64 revision;
678 u32 open_volume;
679 } mixed_mode;
680 };
681
682 #define EFI_FILE_MODE_READ 0x0000000000000001
683 #define EFI_FILE_MODE_WRITE 0x0000000000000002
684 #define EFI_FILE_MODE_CREATE 0x8000000000000000
685
686 typedef enum {
687 EfiPciIoWidthUint8,
688 EfiPciIoWidthUint16,
689 EfiPciIoWidthUint32,
690 EfiPciIoWidthUint64,
691 EfiPciIoWidthFifoUint8,
692 EfiPciIoWidthFifoUint16,
693 EfiPciIoWidthFifoUint32,
694 EfiPciIoWidthFifoUint64,
695 EfiPciIoWidthFillUint8,
696 EfiPciIoWidthFillUint16,
697 EfiPciIoWidthFillUint32,
698 EfiPciIoWidthFillUint64,
699 EfiPciIoWidthMaximum
700 } EFI_PCI_IO_PROTOCOL_WIDTH;
701
702 typedef enum {
703 EfiPciIoAttributeOperationGet,
704 EfiPciIoAttributeOperationSet,
705 EfiPciIoAttributeOperationEnable,
706 EfiPciIoAttributeOperationDisable,
707 EfiPciIoAttributeOperationSupported,
708 EfiPciIoAttributeOperationMaximum
709 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
710
711 typedef struct {
712 u32 read;
713 u32 write;
714 } efi_pci_io_protocol_access_32_t;
715
716 typedef union efi_pci_io_protocol efi_pci_io_protocol_t;
717
718 typedef
719 efi_status_t (__efiapi *efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *,
720 EFI_PCI_IO_PROTOCOL_WIDTH,
721 u32 offset,
722 unsigned long count,
723 void *buffer);
724
725 typedef struct {
726 void *read;
727 void *write;
728 } efi_pci_io_protocol_access_t;
729
730 typedef struct {
731 efi_pci_io_protocol_cfg_t read;
732 efi_pci_io_protocol_cfg_t write;
733 } efi_pci_io_protocol_config_access_t;
734
735 union efi_pci_io_protocol {
736 struct {
737 void *poll_mem;
738 void *poll_io;
739 efi_pci_io_protocol_access_t mem;
740 efi_pci_io_protocol_access_t io;
741 efi_pci_io_protocol_config_access_t pci;
742 void *copy_mem;
743 void *map;
744 void *unmap;
745 void *allocate_buffer;
746 void *free_buffer;
747 void *flush;
748 efi_status_t (__efiapi *get_location)(efi_pci_io_protocol_t *,
749 unsigned long *segment_nr,
750 unsigned long *bus_nr,
751 unsigned long *device_nr,
752 unsigned long *func_nr);
753 void *attributes;
754 void *get_bar_attributes;
755 void *set_bar_attributes;
756 uint64_t romsize;
757 void *romimage;
758 };
759 struct {
760 u32 poll_mem;
761 u32 poll_io;
762 efi_pci_io_protocol_access_32_t mem;
763 efi_pci_io_protocol_access_32_t io;
764 efi_pci_io_protocol_access_32_t pci;
765 u32 copy_mem;
766 u32 map;
767 u32 unmap;
768 u32 allocate_buffer;
769 u32 free_buffer;
770 u32 flush;
771 u32 get_location;
772 u32 attributes;
773 u32 get_bar_attributes;
774 u32 set_bar_attributes;
775 u64 romsize;
776 u32 romimage;
777 } mixed_mode;
778 };
779
780 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
781 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
782 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
783 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
784 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
785 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
786 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
787 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
788 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
789 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
790 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
791 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
792 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
793 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
794 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
795 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
796 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
797 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
798 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
799
800 struct efi_dev_path;
801
802 typedef union apple_properties_protocol apple_properties_protocol_t;
803
804 union apple_properties_protocol {
805 struct {
806 unsigned long version;
807 efi_status_t (__efiapi *get)(apple_properties_protocol_t *,
808 struct efi_dev_path *,
809 efi_char16_t *, void *, u32 *);
810 efi_status_t (__efiapi *set)(apple_properties_protocol_t *,
811 struct efi_dev_path *,
812 efi_char16_t *, void *, u32);
813 efi_status_t (__efiapi *del)(apple_properties_protocol_t *,
814 struct efi_dev_path *,
815 efi_char16_t *);
816 efi_status_t (__efiapi *get_all)(apple_properties_protocol_t *,
817 void *buffer, u32 *);
818 };
819 struct {
820 u32 version;
821 u32 get;
822 u32 set;
823 u32 del;
824 u32 get_all;
825 } mixed_mode;
826 };
827
828 typedef u32 efi_tcg2_event_log_format;
829
830 #define INITRD_EVENT_TAG_ID 0x8F3B22ECU
831 #define LOAD_OPTIONS_EVENT_TAG_ID 0x8F3B22EDU
832 #define EV_EVENT_TAG 0x00000006U
833 #define EFI_TCG2_EVENT_HEADER_VERSION 0x1
834
835 struct efi_tcg2_event {
836 u32 event_size;
837 struct {
838 u32 header_size;
839 u16 header_version;
840 u32 pcr_index;
841 u32 event_type;
842 } __packed event_header;
843 /* u8[] event follows here */
844 } __packed;
845
846 struct efi_tcg2_tagged_event {
847 u32 tagged_event_id;
848 u32 tagged_event_data_size;
849 /* u8 tagged event data follows here */
850 } __packed;
851
852 typedef struct efi_tcg2_event efi_tcg2_event_t;
853 typedef struct efi_tcg2_tagged_event efi_tcg2_tagged_event_t;
854 typedef union efi_tcg2_protocol efi_tcg2_protocol_t;
855
856 union efi_tcg2_protocol {
857 struct {
858 void *get_capability;
859 efi_status_t (__efiapi *get_event_log)(efi_tcg2_protocol_t *,
860 efi_tcg2_event_log_format,
861 efi_physical_addr_t *,
862 efi_physical_addr_t *,
863 efi_bool_t *);
864 efi_status_t (__efiapi *hash_log_extend_event)(efi_tcg2_protocol_t *,
865 u64,
866 efi_physical_addr_t,
867 u64,
868 const efi_tcg2_event_t *);
869 void *submit_command;
870 void *get_active_pcr_banks;
871 void *set_active_pcr_banks;
872 void *get_result_of_set_active_pcr_banks;
873 };
874 struct {
875 u32 get_capability;
876 u32 get_event_log;
877 u32 hash_log_extend_event;
878 u32 submit_command;
879 u32 get_active_pcr_banks;
880 u32 set_active_pcr_banks;
881 u32 get_result_of_set_active_pcr_banks;
882 } mixed_mode;
883 };
884
885 struct riscv_efi_boot_protocol {
886 u64 revision;
887
888 efi_status_t (__efiapi *get_boot_hartid)(struct riscv_efi_boot_protocol *,
889 unsigned long *boot_hartid);
890 };
891
892 typedef union efi_load_file_protocol efi_load_file_protocol_t;
893 typedef union efi_load_file_protocol efi_load_file2_protocol_t;
894
895 union efi_load_file_protocol {
896 struct {
897 efi_status_t (__efiapi *load_file)(efi_load_file_protocol_t *,
898 efi_device_path_protocol_t *,
899 bool, unsigned long *, void *);
900 };
901 struct {
902 u32 load_file;
903 } mixed_mode;
904 };
905
906 typedef struct {
907 u32 attributes;
908 u16 file_path_list_length;
909 u8 variable_data[];
910 // efi_char16_t description[];
911 // efi_device_path_protocol_t file_path_list[];
912 // u8 optional_data[];
913 } __packed efi_load_option_t;
914
915 #define EFI_LOAD_OPTION_ACTIVE 0x0001U
916 #define EFI_LOAD_OPTION_FORCE_RECONNECT 0x0002U
917 #define EFI_LOAD_OPTION_HIDDEN 0x0008U
918 #define EFI_LOAD_OPTION_CATEGORY 0x1f00U
919 #define EFI_LOAD_OPTION_CATEGORY_BOOT 0x0000U
920 #define EFI_LOAD_OPTION_CATEGORY_APP 0x0100U
921
922 #define EFI_LOAD_OPTION_BOOT_MASK \
923 (EFI_LOAD_OPTION_ACTIVE|EFI_LOAD_OPTION_HIDDEN|EFI_LOAD_OPTION_CATEGORY)
924 #define EFI_LOAD_OPTION_MASK (EFI_LOAD_OPTION_FORCE_RECONNECT|EFI_LOAD_OPTION_BOOT_MASK)
925
926 typedef struct {
927 u32 attributes;
928 u16 file_path_list_length;
929 const efi_char16_t *description;
930 const efi_device_path_protocol_t *file_path_list;
931 u32 optional_data_size;
932 const void *optional_data;
933 } efi_load_option_unpacked_t;
934
935 void efi_pci_disable_bridge_busmaster(void);
936
937 typedef efi_status_t (*efi_exit_boot_map_processing)(
938 struct efi_boot_memmap *map,
939 void *priv);
940
941 efi_status_t efi_exit_boot_services(void *handle, void *priv,
942 efi_exit_boot_map_processing priv_func);
943
944 efi_status_t efi_boot_kernel(void *handle, efi_loaded_image_t *image,
945 unsigned long kernel_addr, char *cmdline_ptr);
946
947 void *get_fdt(unsigned long *fdt_size);
948
949 efi_status_t efi_alloc_virtmap(efi_memory_desc_t **virtmap,
950 unsigned long *desc_size, u32 *desc_ver);
951 void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
952 unsigned long desc_size, efi_memory_desc_t *runtime_map,
953 int *count);
954
955 efi_status_t efi_get_random_bytes(unsigned long size, u8 *out);
956
957 efi_status_t efi_random_alloc(unsigned long size, unsigned long align,
958 unsigned long *addr, unsigned long random_seed,
959 int memory_type, unsigned long alloc_limit);
960
961 efi_status_t efi_random_get_seed(void);
962
963 efi_status_t check_platform_features(void);
964
965 void *get_efi_config_table(efi_guid_t guid);
966
967 /* NOTE: These functions do not print a trailing newline after the string */
968 void efi_char16_puts(efi_char16_t *);
969 void efi_puts(const char *str);
970
971 __printf(1, 2) int efi_printk(char const *fmt, ...);
972
973 void efi_free(unsigned long size, unsigned long addr);
974
975 void efi_apply_loadoptions_quirk(const void **load_options, u32 *load_options_size);
976
977 char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len);
978
979 efi_status_t efi_get_memory_map(struct efi_boot_memmap **map,
980 bool install_cfg_tbl);
981
982 efi_status_t efi_allocate_pages(unsigned long size, unsigned long *addr,
983 unsigned long max);
984
985 efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr,
986 unsigned long max, unsigned long align,
987 int memory_type);
988
989 efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
990 unsigned long *addr, unsigned long min);
991
992 efi_status_t efi_relocate_kernel(unsigned long *image_addr,
993 unsigned long image_size,
994 unsigned long alloc_size,
995 unsigned long preferred_addr,
996 unsigned long alignment,
997 unsigned long min_addr);
998
999 efi_status_t efi_parse_options(char const *cmdline);
1000
1001 void efi_parse_option_graphics(char *option);
1002
1003 efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,
1004 unsigned long size);
1005
1006 efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
1007 const efi_char16_t *optstr,
1008 int optstr_size,
1009 unsigned long soft_limit,
1010 unsigned long hard_limit,
1011 unsigned long *load_addr,
1012 unsigned long *load_size);
1013
1014
efi_load_dtb(efi_loaded_image_t * image,unsigned long * load_addr,unsigned long * load_size)1015 static inline efi_status_t efi_load_dtb(efi_loaded_image_t *image,
1016 unsigned long *load_addr,
1017 unsigned long *load_size)
1018 {
1019 return handle_cmdline_files(image, L"dtb=", sizeof(L"dtb=") - 2,
1020 ULONG_MAX, ULONG_MAX, load_addr, load_size);
1021 }
1022
1023 efi_status_t efi_load_initrd(efi_loaded_image_t *image,
1024 unsigned long soft_limit,
1025 unsigned long hard_limit,
1026 const struct linux_efi_initrd **out);
1027 /*
1028 * This function handles the architcture specific differences between arm and
1029 * arm64 regarding where the kernel image must be loaded and any memory that
1030 * must be reserved. On failure it is required to free all
1031 * all allocations it has made.
1032 */
1033 efi_status_t handle_kernel_image(unsigned long *image_addr,
1034 unsigned long *image_size,
1035 unsigned long *reserve_addr,
1036 unsigned long *reserve_size,
1037 efi_loaded_image_t *image,
1038 efi_handle_t image_handle);
1039
1040 /* shared entrypoint between the normal stub and the zboot stub */
1041 efi_status_t efi_stub_common(efi_handle_t handle,
1042 efi_loaded_image_t *image,
1043 unsigned long image_addr,
1044 char *cmdline_ptr);
1045
1046 efi_status_t efi_handle_cmdline(efi_loaded_image_t *image, char **cmdline_ptr);
1047
1048 asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint,
1049 unsigned long fdt_addr,
1050 unsigned long fdt_size);
1051
1052 void efi_handle_post_ebs_state(void);
1053
1054 enum efi_secureboot_mode efi_get_secureboot(void);
1055
1056 #ifdef CONFIG_RESET_ATTACK_MITIGATION
1057 void efi_enable_reset_attack_mitigation(void);
1058 #else
1059 static inline void
efi_enable_reset_attack_mitigation(void)1060 efi_enable_reset_attack_mitigation(void) { }
1061 #endif
1062
1063 void efi_retrieve_tpm2_eventlog(void);
1064
1065 struct screen_info *alloc_screen_info(void);
1066 struct screen_info *__alloc_screen_info(void);
1067 void free_screen_info(struct screen_info *si);
1068
1069 void efi_cache_sync_image(unsigned long image_base,
1070 unsigned long alloc_size);
1071
1072 struct efi_smbios_record {
1073 u8 type;
1074 u8 length;
1075 u16 handle;
1076 };
1077
1078 const struct efi_smbios_record *efi_get_smbios_record(u8 type);
1079
1080 struct efi_smbios_type1_record {
1081 struct efi_smbios_record header;
1082
1083 u8 manufacturer;
1084 u8 product_name;
1085 u8 version;
1086 u8 serial_number;
1087 efi_guid_t uuid;
1088 u8 wakeup_type;
1089 u8 sku_number;
1090 u8 family;
1091 };
1092
1093 struct efi_smbios_type4_record {
1094 struct efi_smbios_record header;
1095
1096 u8 socket;
1097 u8 processor_type;
1098 u8 processor_family;
1099 u8 processor_manufacturer;
1100 u8 processor_id[8];
1101 u8 processor_version;
1102 u8 voltage;
1103 u16 external_clock;
1104 u16 max_speed;
1105 u16 current_speed;
1106 u8 status;
1107 u8 processor_upgrade;
1108 u16 l1_cache_handle;
1109 u16 l2_cache_handle;
1110 u16 l3_cache_handle;
1111 u8 serial_number;
1112 u8 asset_tag;
1113 u8 part_number;
1114 u8 core_count;
1115 u8 enabled_core_count;
1116 u8 thread_count;
1117 u16 processor_characteristics;
1118 u16 processor_family2;
1119 u16 core_count2;
1120 u16 enabled_core_count2;
1121 u16 thread_count2;
1122 u16 thread_enabled;
1123 };
1124
1125 #define efi_get_smbios_string(__record, __type, __name) ({ \
1126 int off = offsetof(struct efi_smbios_type ## __type ## _record, \
1127 __name); \
1128 __efi_get_smbios_string((__record), __type, off); \
1129 })
1130
1131 const u8 *__efi_get_smbios_string(const struct efi_smbios_record *record,
1132 u8 type, int offset);
1133
1134 void efi_remap_image(unsigned long image_base, unsigned alloc_size,
1135 unsigned long code_size);
1136 efi_status_t efi_kaslr_relocate_kernel(unsigned long *image_addr,
1137 unsigned long *reserve_addr,
1138 unsigned long *reserve_size,
1139 unsigned long kernel_size,
1140 unsigned long kernel_codesize,
1141 unsigned long kernel_memsize,
1142 u32 phys_seed);
1143 u32 efi_kaslr_get_phys_seed(efi_handle_t image_handle);
1144
1145 asmlinkage efi_status_t __efiapi
1146 efi_zboot_entry(efi_handle_t handle, efi_system_table_t *systab);
1147
1148 efi_status_t allocate_unaccepted_bitmap(__u32 nr_desc,
1149 struct efi_boot_memmap *map);
1150 void process_unaccepted_memory(u64 start, u64 end);
1151 void accept_memory(phys_addr_t start, phys_addr_t end);
1152 void arch_accept_memory(phys_addr_t start, phys_addr_t end);
1153
1154 #endif
1155
