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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_EFI_H
3#define _LINUX_EFI_H
4
5/*
6 * Extensible Firmware Interface
7 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
8 *
9 * Copyright (C) 1999 VA Linux Systems
10 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
11 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
12 * David Mosberger-Tang <davidm@hpl.hp.com>
13 * Stephane Eranian <eranian@hpl.hp.com>
14 */
15#include <linux/init.h>
16#include <linux/string.h>
17#include <linux/time.h>
18#include <linux/types.h>
19#include <linux/proc_fs.h>
20#include <linux/rtc.h>
21#include <linux/ioport.h>
22#include <linux/pfn.h>
23#include <linux/pstore.h>
24#include <linux/range.h>
25#include <linux/reboot.h>
26#include <linux/uuid.h>
27#include <linux/screen_info.h>
28
29#include <asm/page.h>
30
31#define EFI_SUCCESS 0
32#define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))
33#define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1)))
34#define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1)))
35#define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))
36#define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1)))
37#define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1)))
38#define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1)))
39#define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1)))
40#define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1)))
41#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
42#define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1)))
43#define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
44
45typedef unsigned long efi_status_t;
46typedef u8 efi_bool_t;
47typedef u16 efi_char16_t; /* UNICODE character */
48typedef u64 efi_physical_addr_t;
49typedef void *efi_handle_t;
50
51typedef guid_t efi_guid_t;
52
53#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
54 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
55
56/*
57 * Generic EFI table header
58 */
59typedef struct {
60 u64 signature;
61 u32 revision;
62 u32 headersize;
63 u32 crc32;
64 u32 reserved;
65} efi_table_hdr_t;
66
67/*
68 * Memory map descriptor:
69 */
70
71/* Memory types: */
72#define EFI_RESERVED_TYPE 0
73#define EFI_LOADER_CODE 1
74#define EFI_LOADER_DATA 2
75#define EFI_BOOT_SERVICES_CODE 3
76#define EFI_BOOT_SERVICES_DATA 4
77#define EFI_RUNTIME_SERVICES_CODE 5
78#define EFI_RUNTIME_SERVICES_DATA 6
79#define EFI_CONVENTIONAL_MEMORY 7
80#define EFI_UNUSABLE_MEMORY 8
81#define EFI_ACPI_RECLAIM_MEMORY 9
82#define EFI_ACPI_MEMORY_NVS 10
83#define EFI_MEMORY_MAPPED_IO 11
84#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
85#define EFI_PAL_CODE 13
86#define EFI_PERSISTENT_MEMORY 14
87#define EFI_MAX_MEMORY_TYPE 15
88
89/* Attribute values: */
90#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
91#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
92#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
93#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
94#define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
95#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
96#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
97#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
98#define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
99#define EFI_MEMORY_MORE_RELIABLE \
100 ((u64)0x0000000000010000ULL) /* higher reliability */
101#define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
102#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
103#define EFI_MEMORY_DESCRIPTOR_VERSION 1
104
105#define EFI_PAGE_SHIFT 12
106#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
107#define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
108
109typedef struct {
110 u32 type;
111 u32 pad;
112 u64 phys_addr;
113 u64 virt_addr;
114 u64 num_pages;
115 u64 attribute;
116} efi_memory_desc_t;
117
118typedef struct {
119 efi_guid_t guid;
120 u32 headersize;
121 u32 flags;
122 u32 imagesize;
123} efi_capsule_header_t;
124
125struct efi_boot_memmap {
126 efi_memory_desc_t **map;
127 unsigned long *map_size;
128 unsigned long *desc_size;
129 u32 *desc_ver;
130 unsigned long *key_ptr;
131 unsigned long *buff_size;
132};
133
134/*
135 * EFI capsule flags
136 */
137#define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
138#define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
139#define EFI_CAPSULE_INITIATE_RESET 0x00040000
140
141struct capsule_info {
142 efi_capsule_header_t header;
143 int reset_type;
144 long index;
145 size_t count;
146 size_t total_size;
147 phys_addr_t *pages;
148 size_t page_bytes_remain;
149};
150
151int __efi_capsule_setup_info(struct capsule_info *cap_info);
152
153/*
154 * Allocation types for calls to boottime->allocate_pages.
155 */
156#define EFI_ALLOCATE_ANY_PAGES 0
157#define EFI_ALLOCATE_MAX_ADDRESS 1
158#define EFI_ALLOCATE_ADDRESS 2
159#define EFI_MAX_ALLOCATE_TYPE 3
160
161typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
162
163/*
164 * Types and defines for Time Services
165 */
166#define EFI_TIME_ADJUST_DAYLIGHT 0x1
167#define EFI_TIME_IN_DAYLIGHT 0x2
168#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
169
170typedef struct {
171 u16 year;
172 u8 month;
173 u8 day;
174 u8 hour;
175 u8 minute;
176 u8 second;
177 u8 pad1;
178 u32 nanosecond;
179 s16 timezone;
180 u8 daylight;
181 u8 pad2;
182} efi_time_t;
183
184typedef struct {
185 u32 resolution;
186 u32 accuracy;
187 u8 sets_to_zero;
188} efi_time_cap_t;
189
190typedef struct {
191 efi_table_hdr_t hdr;
192 u32 raise_tpl;
193 u32 restore_tpl;
194 u32 allocate_pages;
195 u32 free_pages;
196 u32 get_memory_map;
197 u32 allocate_pool;
198 u32 free_pool;
199 u32 create_event;
200 u32 set_timer;
201 u32 wait_for_event;
202 u32 signal_event;
203 u32 close_event;
204 u32 check_event;
205 u32 install_protocol_interface;
206 u32 reinstall_protocol_interface;
207 u32 uninstall_protocol_interface;
208 u32 handle_protocol;
209 u32 __reserved;
210 u32 register_protocol_notify;
211 u32 locate_handle;
212 u32 locate_device_path;
213 u32 install_configuration_table;
214 u32 load_image;
215 u32 start_image;
216 u32 exit;
217 u32 unload_image;
218 u32 exit_boot_services;
219 u32 get_next_monotonic_count;
220 u32 stall;
221 u32 set_watchdog_timer;
222 u32 connect_controller;
223 u32 disconnect_controller;
224 u32 open_protocol;
225 u32 close_protocol;
226 u32 open_protocol_information;
227 u32 protocols_per_handle;
228 u32 locate_handle_buffer;
229 u32 locate_protocol;
230 u32 install_multiple_protocol_interfaces;
231 u32 uninstall_multiple_protocol_interfaces;
232 u32 calculate_crc32;
233 u32 copy_mem;
234 u32 set_mem;
235 u32 create_event_ex;
236} __packed efi_boot_services_32_t;
237
238typedef struct {
239 efi_table_hdr_t hdr;
240 u64 raise_tpl;
241 u64 restore_tpl;
242 u64 allocate_pages;
243 u64 free_pages;
244 u64 get_memory_map;
245 u64 allocate_pool;
246 u64 free_pool;
247 u64 create_event;
248 u64 set_timer;
249 u64 wait_for_event;
250 u64 signal_event;
251 u64 close_event;
252 u64 check_event;
253 u64 install_protocol_interface;
254 u64 reinstall_protocol_interface;
255 u64 uninstall_protocol_interface;
256 u64 handle_protocol;
257 u64 __reserved;
258 u64 register_protocol_notify;
259 u64 locate_handle;
260 u64 locate_device_path;
261 u64 install_configuration_table;
262 u64 load_image;
263 u64 start_image;
264 u64 exit;
265 u64 unload_image;
266 u64 exit_boot_services;
267 u64 get_next_monotonic_count;
268 u64 stall;
269 u64 set_watchdog_timer;
270 u64 connect_controller;
271 u64 disconnect_controller;
272 u64 open_protocol;
273 u64 close_protocol;
274 u64 open_protocol_information;
275 u64 protocols_per_handle;
276 u64 locate_handle_buffer;
277 u64 locate_protocol;
278 u64 install_multiple_protocol_interfaces;
279 u64 uninstall_multiple_protocol_interfaces;
280 u64 calculate_crc32;
281 u64 copy_mem;
282 u64 set_mem;
283 u64 create_event_ex;
284} __packed efi_boot_services_64_t;
285
286/*
287 * EFI Boot Services table
288 */
289typedef struct {
290 efi_table_hdr_t hdr;
291 void *raise_tpl;
292 void *restore_tpl;
293 efi_status_t (*allocate_pages)(int, int, unsigned long,
294 efi_physical_addr_t *);
295 efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
296 efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
297 unsigned long *, u32 *);
298 efi_status_t (*allocate_pool)(int, unsigned long, void **);
299 efi_status_t (*free_pool)(void *);
300 void *create_event;
301 void *set_timer;
302 void *wait_for_event;
303 void *signal_event;
304 void *close_event;
305 void *check_event;
306 void *install_protocol_interface;
307 void *reinstall_protocol_interface;
308 void *uninstall_protocol_interface;
309 efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
310 void *__reserved;
311 void *register_protocol_notify;
312 efi_status_t (*locate_handle)(int, efi_guid_t *, void *,
313 unsigned long *, efi_handle_t *);
314 void *locate_device_path;
315 efi_status_t (*install_configuration_table)(efi_guid_t *, void *);
316 void *load_image;
317 void *start_image;
318 void *exit;
319 void *unload_image;
320 efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
321 void *get_next_monotonic_count;
322 void *stall;
323 void *set_watchdog_timer;
324 void *connect_controller;
325 void *disconnect_controller;
326 void *open_protocol;
327 void *close_protocol;
328 void *open_protocol_information;
329 void *protocols_per_handle;
330 void *locate_handle_buffer;
331 efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
332 void *install_multiple_protocol_interfaces;
333 void *uninstall_multiple_protocol_interfaces;
334 void *calculate_crc32;
335 void *copy_mem;
336 void *set_mem;
337 void *create_event_ex;
338} efi_boot_services_t;
339
340typedef enum {
341 EfiPciIoWidthUint8,
342 EfiPciIoWidthUint16,
343 EfiPciIoWidthUint32,
344 EfiPciIoWidthUint64,
345 EfiPciIoWidthFifoUint8,
346 EfiPciIoWidthFifoUint16,
347 EfiPciIoWidthFifoUint32,
348 EfiPciIoWidthFifoUint64,
349 EfiPciIoWidthFillUint8,
350 EfiPciIoWidthFillUint16,
351 EfiPciIoWidthFillUint32,
352 EfiPciIoWidthFillUint64,
353 EfiPciIoWidthMaximum
354} EFI_PCI_IO_PROTOCOL_WIDTH;
355
356typedef enum {
357 EfiPciIoAttributeOperationGet,
358 EfiPciIoAttributeOperationSet,
359 EfiPciIoAttributeOperationEnable,
360 EfiPciIoAttributeOperationDisable,
361 EfiPciIoAttributeOperationSupported,
362 EfiPciIoAttributeOperationMaximum
363} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
364
365typedef struct {
366 u32 read;
367 u32 write;
368} efi_pci_io_protocol_access_32_t;
369
370typedef struct {
371 u64 read;
372 u64 write;
373} efi_pci_io_protocol_access_64_t;
374
375typedef struct {
376 void *read;
377 void *write;
378} efi_pci_io_protocol_access_t;
379
380typedef struct {
381 u32 poll_mem;
382 u32 poll_io;
383 efi_pci_io_protocol_access_32_t mem;
384 efi_pci_io_protocol_access_32_t io;
385 efi_pci_io_protocol_access_32_t pci;
386 u32 copy_mem;
387 u32 map;
388 u32 unmap;
389 u32 allocate_buffer;
390 u32 free_buffer;
391 u32 flush;
392 u32 get_location;
393 u32 attributes;
394 u32 get_bar_attributes;
395 u32 set_bar_attributes;
396 uint64_t romsize;
397 void *romimage;
398} efi_pci_io_protocol_32;
399
400typedef struct {
401 u64 poll_mem;
402 u64 poll_io;
403 efi_pci_io_protocol_access_64_t mem;
404 efi_pci_io_protocol_access_64_t io;
405 efi_pci_io_protocol_access_64_t pci;
406 u64 copy_mem;
407 u64 map;
408 u64 unmap;
409 u64 allocate_buffer;
410 u64 free_buffer;
411 u64 flush;
412 u64 get_location;
413 u64 attributes;
414 u64 get_bar_attributes;
415 u64 set_bar_attributes;
416 uint64_t romsize;
417 void *romimage;
418} efi_pci_io_protocol_64;
419
420typedef struct {
421 void *poll_mem;
422 void *poll_io;
423 efi_pci_io_protocol_access_t mem;
424 efi_pci_io_protocol_access_t io;
425 efi_pci_io_protocol_access_t pci;
426 void *copy_mem;
427 void *map;
428 void *unmap;
429 void *allocate_buffer;
430 void *free_buffer;
431 void *flush;
432 void *get_location;
433 void *attributes;
434 void *get_bar_attributes;
435 void *set_bar_attributes;
436 uint64_t romsize;
437 void *romimage;
438} efi_pci_io_protocol;
439
440#define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
441#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
442#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
443#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
444#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
445#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
446#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
447#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
448#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
449#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
450#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
451#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
452#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
453#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
454#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
455#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
456#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
457#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
458#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
459
460typedef struct {
461 u32 version;
462 u32 get;
463 u32 set;
464 u32 del;
465 u32 get_all;
466} apple_properties_protocol_32_t;
467
468typedef struct {
469 u64 version;
470 u64 get;
471 u64 set;
472 u64 del;
473 u64 get_all;
474} apple_properties_protocol_64_t;
475
476/*
477 * Types and defines for EFI ResetSystem
478 */
479#define EFI_RESET_COLD 0
480#define EFI_RESET_WARM 1
481#define EFI_RESET_SHUTDOWN 2
482
483/*
484 * EFI Runtime Services table
485 */
486#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
487#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
488
489typedef struct {
490 efi_table_hdr_t hdr;
491 u32 get_time;
492 u32 set_time;
493 u32 get_wakeup_time;
494 u32 set_wakeup_time;
495 u32 set_virtual_address_map;
496 u32 convert_pointer;
497 u32 get_variable;
498 u32 get_next_variable;
499 u32 set_variable;
500 u32 get_next_high_mono_count;
501 u32 reset_system;
502 u32 update_capsule;
503 u32 query_capsule_caps;
504 u32 query_variable_info;
505} efi_runtime_services_32_t;
506
507typedef struct {
508 efi_table_hdr_t hdr;
509 u64 get_time;
510 u64 set_time;
511 u64 get_wakeup_time;
512 u64 set_wakeup_time;
513 u64 set_virtual_address_map;
514 u64 convert_pointer;
515 u64 get_variable;
516 u64 get_next_variable;
517 u64 set_variable;
518 u64 get_next_high_mono_count;
519 u64 reset_system;
520 u64 update_capsule;
521 u64 query_capsule_caps;
522 u64 query_variable_info;
523} efi_runtime_services_64_t;
524
525typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
526typedef efi_status_t efi_set_time_t (efi_time_t *tm);
527typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
528 efi_time_t *tm);
529typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
530typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
531 unsigned long *data_size, void *data);
532typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
533 efi_guid_t *vendor);
534typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
535 u32 attr, unsigned long data_size,
536 void *data);
537typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
538typedef void efi_reset_system_t (int reset_type, efi_status_t status,
539 unsigned long data_size, efi_char16_t *data);
540typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
541 unsigned long descriptor_size,
542 u32 descriptor_version,
543 efi_memory_desc_t *virtual_map);
544typedef efi_status_t efi_query_variable_info_t(u32 attr,
545 u64 *storage_space,
546 u64 *remaining_space,
547 u64 *max_variable_size);
548typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
549 unsigned long count,
550 unsigned long sg_list);
551typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
552 unsigned long count,
553 u64 *max_size,
554 int *reset_type);
555typedef efi_status_t efi_query_variable_store_t(u32 attributes,
556 unsigned long size,
557 bool nonblocking);
558
559typedef struct {
560 efi_table_hdr_t hdr;
561 efi_get_time_t *get_time;
562 efi_set_time_t *set_time;
563 efi_get_wakeup_time_t *get_wakeup_time;
564 efi_set_wakeup_time_t *set_wakeup_time;
565 efi_set_virtual_address_map_t *set_virtual_address_map;
566 void *convert_pointer;
567 efi_get_variable_t *get_variable;
568 efi_get_next_variable_t *get_next_variable;
569 efi_set_variable_t *set_variable;
570 efi_get_next_high_mono_count_t *get_next_high_mono_count;
571 efi_reset_system_t *reset_system;
572 efi_update_capsule_t *update_capsule;
573 efi_query_capsule_caps_t *query_capsule_caps;
574 efi_query_variable_info_t *query_variable_info;
575} efi_runtime_services_t;
576
577void efi_native_runtime_setup(void);
578
579/*
580 * EFI Configuration Table and GUID definitions
581 *
582 * These are all defined in a single line to make them easier to
583 * grep for and to see them at a glance - while still having a
584 * similar structure to the definitions in the spec.
585 *
586 * Here's how they are structured:
587 *
588 * GUID: 12345678-1234-1234-1234-123456789012
589 * Spec:
590 * #define EFI_SOME_PROTOCOL_GUID \
591 * {0x12345678,0x1234,0x1234,\
592 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
593 * Here:
594 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
595 * ^ tabs ^extra space
596 *
597 * Note that the 'extra space' separates the values at the same place
598 * where the UEFI SPEC breaks the line.
599 */
600#define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
601#define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
602#define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
603#define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
604#define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
605#define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
606#define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
607#define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
608#define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
609#define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
610#define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
611#define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
612#define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
613#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
614#define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
615#define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
616#define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
617#define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
618#define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
619#define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
620#define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
621#define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
622#define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
623#define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
624#define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
625#define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
626
627#define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
628#define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
629
630/*
631 * This GUID is used to pass to the kernel proper the struct screen_info
632 * structure that was populated by the stub based on the GOP protocol instance
633 * associated with ConOut
634 */
635#define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
636#define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
637#define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
638
639typedef struct {
640 efi_guid_t guid;
641 u64 table;
642} efi_config_table_64_t;
643
644typedef struct {
645 efi_guid_t guid;
646 u32 table;
647} efi_config_table_32_t;
648
649typedef struct {
650 efi_guid_t guid;
651 unsigned long table;
652} efi_config_table_t;
653
654typedef struct {
655 efi_guid_t guid;
656 const char *name;
657 unsigned long *ptr;
658} efi_config_table_type_t;
659
660#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
661
662#define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
663#define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
664#define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
665#define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
666#define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
667#define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
668
669typedef struct {
670 efi_table_hdr_t hdr;
671 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
672 u32 fw_revision;
673 u32 __pad1;
674 u64 con_in_handle;
675 u64 con_in;
676 u64 con_out_handle;
677 u64 con_out;
678 u64 stderr_handle;
679 u64 stderr;
680 u64 runtime;
681 u64 boottime;
682 u32 nr_tables;
683 u32 __pad2;
684 u64 tables;
685} efi_system_table_64_t;
686
687typedef struct {
688 efi_table_hdr_t hdr;
689 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
690 u32 fw_revision;
691 u32 con_in_handle;
692 u32 con_in;
693 u32 con_out_handle;
694 u32 con_out;
695 u32 stderr_handle;
696 u32 stderr;
697 u32 runtime;
698 u32 boottime;
699 u32 nr_tables;
700 u32 tables;
701} efi_system_table_32_t;
702
703typedef struct {
704 efi_table_hdr_t hdr;
705 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
706 u32 fw_revision;
707 unsigned long con_in_handle;
708 unsigned long con_in;
709 unsigned long con_out_handle;
710 unsigned long con_out;
711 unsigned long stderr_handle;
712 unsigned long stderr;
713 efi_runtime_services_t *runtime;
714 efi_boot_services_t *boottime;
715 unsigned long nr_tables;
716 unsigned long tables;
717} efi_system_table_t;
718
719/*
720 * Architecture independent structure for describing a memory map for the
721 * benefit of efi_memmap_init_early(), saving us the need to pass four
722 * parameters.
723 */
724struct efi_memory_map_data {
725 phys_addr_t phys_map;
726 unsigned long size;
727 unsigned long desc_version;
728 unsigned long desc_size;
729};
730
731struct efi_memory_map {
732 phys_addr_t phys_map;
733 void *map;
734 void *map_end;
735 int nr_map;
736 unsigned long desc_version;
737 unsigned long desc_size;
738 bool late;
739};
740
741struct efi_mem_range {
742 struct range range;
743 u64 attribute;
744};
745
746struct efi_fdt_params {
747 u64 system_table;
748 u64 mmap;
749 u32 mmap_size;
750 u32 desc_size;
751 u32 desc_ver;
752};
753
754typedef struct {
755 u32 revision;
756 u32 parent_handle;
757 u32 system_table;
758 u32 device_handle;
759 u32 file_path;
760 u32 reserved;
761 u32 load_options_size;
762 u32 load_options;
763 u32 image_base;
764 __aligned_u64 image_size;
765 unsigned int image_code_type;
766 unsigned int image_data_type;
767 unsigned long unload;
768} efi_loaded_image_32_t;
769
770typedef struct {
771 u32 revision;
772 u64 parent_handle;
773 u64 system_table;
774 u64 device_handle;
775 u64 file_path;
776 u64 reserved;
777 u32 load_options_size;
778 u64 load_options;
779 u64 image_base;
780 __aligned_u64 image_size;
781 unsigned int image_code_type;
782 unsigned int image_data_type;
783 unsigned long unload;
784} efi_loaded_image_64_t;
785
786typedef struct {
787 u32 revision;
788 void *parent_handle;
789 efi_system_table_t *system_table;
790 void *device_handle;
791 void *file_path;
792 void *reserved;
793 u32 load_options_size;
794 void *load_options;
795 void *image_base;
796 __aligned_u64 image_size;
797 unsigned int image_code_type;
798 unsigned int image_data_type;
799 unsigned long unload;
800} efi_loaded_image_t;
801
802
803typedef struct {
804 u64 size;
805 u64 file_size;
806 u64 phys_size;
807 efi_time_t create_time;
808 efi_time_t last_access_time;
809 efi_time_t modification_time;
810 __aligned_u64 attribute;
811 efi_char16_t filename[1];
812} efi_file_info_t;
813
814typedef struct {
815 u64 revision;
816 u32 open;
817 u32 close;
818 u32 delete;
819 u32 read;
820 u32 write;
821 u32 get_position;
822 u32 set_position;
823 u32 get_info;
824 u32 set_info;
825 u32 flush;
826} efi_file_handle_32_t;
827
828typedef struct {
829 u64 revision;
830 u64 open;
831 u64 close;
832 u64 delete;
833 u64 read;
834 u64 write;
835 u64 get_position;
836 u64 set_position;
837 u64 get_info;
838 u64 set_info;
839 u64 flush;
840} efi_file_handle_64_t;
841
842typedef struct _efi_file_handle {
843 u64 revision;
844 efi_status_t (*open)(struct _efi_file_handle *,
845 struct _efi_file_handle **,
846 efi_char16_t *, u64, u64);
847 efi_status_t (*close)(struct _efi_file_handle *);
848 void *delete;
849 efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
850 void *);
851 void *write;
852 void *get_position;
853 void *set_position;
854 efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
855 unsigned long *, void *);
856 void *set_info;
857 void *flush;
858} efi_file_handle_t;
859
860typedef struct _efi_file_io_interface {
861 u64 revision;
862 int (*open_volume)(struct _efi_file_io_interface *,
863 efi_file_handle_t **);
864} efi_file_io_interface_t;
865
866#define EFI_FILE_MODE_READ 0x0000000000000001
867#define EFI_FILE_MODE_WRITE 0x0000000000000002
868#define EFI_FILE_MODE_CREATE 0x8000000000000000
869
870typedef struct {
871 u32 version;
872 u32 length;
873 u64 memory_protection_attribute;
874} efi_properties_table_t;
875
876#define EFI_PROPERTIES_TABLE_VERSION 0x00010000
877#define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
878
879#define EFI_INVALID_TABLE_ADDR (~0UL)
880
881typedef struct {
882 u32 version;
883 u32 num_entries;
884 u32 desc_size;
885 u32 reserved;
886 efi_memory_desc_t entry[0];
887} efi_memory_attributes_table_t;
888
889/*
890 * All runtime access to EFI goes through this structure:
891 */
892extern struct efi {
893 efi_system_table_t *systab; /* EFI system table */
894 unsigned int runtime_version; /* Runtime services version */
895 unsigned long mps; /* MPS table */
896 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
897 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
898 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
899 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
900 unsigned long sal_systab; /* SAL system table */
901 unsigned long boot_info; /* boot info table */
902 unsigned long hcdp; /* HCDP table */
903 unsigned long uga; /* UGA table */
904 unsigned long uv_systab; /* UV system table */
905 unsigned long fw_vendor; /* fw_vendor */
906 unsigned long runtime; /* runtime table */
907 unsigned long config_table; /* config tables */
908 unsigned long esrt; /* ESRT table */
909 unsigned long properties_table; /* properties table */
910 unsigned long mem_attr_table; /* memory attributes table */
911 unsigned long rng_seed; /* UEFI firmware random seed */
912 efi_get_time_t *get_time;
913 efi_set_time_t *set_time;
914 efi_get_wakeup_time_t *get_wakeup_time;
915 efi_set_wakeup_time_t *set_wakeup_time;
916 efi_get_variable_t *get_variable;
917 efi_get_next_variable_t *get_next_variable;
918 efi_set_variable_t *set_variable;
919 efi_set_variable_t *set_variable_nonblocking;
920 efi_query_variable_info_t *query_variable_info;
921 efi_query_variable_info_t *query_variable_info_nonblocking;
922 efi_update_capsule_t *update_capsule;
923 efi_query_capsule_caps_t *query_capsule_caps;
924 efi_get_next_high_mono_count_t *get_next_high_mono_count;
925 efi_reset_system_t *reset_system;
926 efi_set_virtual_address_map_t *set_virtual_address_map;
927 struct efi_memory_map memmap;
928 unsigned long flags;
929} efi;
930
931static inline int
932efi_guidcmp (efi_guid_t left, efi_guid_t right)
933{
934 return memcmp(&left, &right, sizeof (efi_guid_t));
935}
936
937static inline char *
938efi_guid_to_str(efi_guid_t *guid, char *out)
939{
940 sprintf(out, "%pUl", guid->b);
941 return out;
942}
943
944extern void efi_init (void);
945extern void *efi_get_pal_addr (void);
946extern void efi_map_pal_code (void);
947extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
948extern void efi_gettimeofday (struct timespec64 *ts);
949extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
950#ifdef CONFIG_X86
951extern void efi_late_init(void);
952extern void efi_free_boot_services(void);
953extern efi_status_t efi_query_variable_store(u32 attributes,
954 unsigned long size,
955 bool nonblocking);
956extern void efi_find_mirror(void);
957#else
958static inline void efi_late_init(void) {}
959static inline void efi_free_boot_services(void) {}
960
961static inline efi_status_t efi_query_variable_store(u32 attributes,
962 unsigned long size,
963 bool nonblocking)
964{
965 return EFI_SUCCESS;
966}
967#endif
968extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
969
970extern phys_addr_t __init efi_memmap_alloc(unsigned int num_entries);
971extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
972extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
973extern void __init efi_memmap_unmap(void);
974extern int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map);
975extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
976 struct range *range);
977extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
978 void *buf, struct efi_mem_range *mem);
979
980extern int efi_config_init(efi_config_table_type_t *arch_tables);
981#ifdef CONFIG_EFI_ESRT
982extern void __init efi_esrt_init(void);
983#else
984static inline void efi_esrt_init(void) { }
985#endif
986extern int efi_config_parse_tables(void *config_tables, int count, int sz,
987 efi_config_table_type_t *arch_tables);
988extern u64 efi_get_iobase (void);
989extern int efi_mem_type(unsigned long phys_addr);
990extern u64 efi_mem_attributes (unsigned long phys_addr);
991extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
992extern int __init efi_uart_console_only (void);
993extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
994extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
995extern void efi_mem_reserve(phys_addr_t addr, u64 size);
996extern void efi_initialize_iomem_resources(struct resource *code_resource,
997 struct resource *data_resource, struct resource *bss_resource);
998extern void efi_reserve_boot_services(void);
999extern int efi_get_fdt_params(struct efi_fdt_params *params);
1000extern struct kobject *efi_kobj;
1001
1002extern int efi_reboot_quirk_mode;
1003extern bool efi_poweroff_required(void);
1004
1005#ifdef CONFIG_EFI_FAKE_MEMMAP
1006extern void __init efi_fake_memmap(void);
1007#else
1008static inline void efi_fake_memmap(void) { }
1009#endif
1010
1011/*
1012 * efi_memattr_perm_setter - arch specific callback function passed into
1013 * efi_memattr_apply_permissions() that updates the
1014 * mapping permissions described by the second
1015 * argument in the page tables referred to by the
1016 * first argument.
1017 */
1018typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
1019
1020extern int efi_memattr_init(void);
1021extern int efi_memattr_apply_permissions(struct mm_struct *mm,
1022 efi_memattr_perm_setter fn);
1023
1024/*
1025 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
1026 * @map: the start of efi memmap
1027 * @desc_size: the size of space for each EFI memmap descriptor
1028 * @n: the index of efi memmap descriptor
1029 *
1030 * EFI boot service provides the GetMemoryMap() function to get a copy of the
1031 * current memory map which is an array of memory descriptors, each of
1032 * which describes a contiguous block of memory. It also gets the size of the
1033 * map, and the size of each descriptor, etc.
1034 *
1035 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
1036 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
1037 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
1038 * MUST use the returned size of the descriptor to find the start of each
1039 * efi_memory_memdesc_t in the memory map array. This should only be used
1040 * during bootup since for_each_efi_memory_desc_xxx() is available after the
1041 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
1042 */
1043#define efi_early_memdesc_ptr(map, desc_size, n) \
1044 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
1045
1046/* Iterate through an efi_memory_map */
1047#define for_each_efi_memory_desc_in_map(m, md) \
1048 for ((md) = (m)->map; \
1049 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
1050 (md) = (void *)(md) + (m)->desc_size)
1051
1052/**
1053 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1054 * @md: the efi_memory_desc_t * iterator
1055 *
1056 * Once the loop finishes @md must not be accessed.
1057 */
1058#define for_each_efi_memory_desc(md) \
1059 for_each_efi_memory_desc_in_map(&efi.memmap, md)
1060
1061/*
1062 * Format an EFI memory descriptor's type and attributes to a user-provided
1063 * character buffer, as per snprintf(), and return the buffer.
1064 */
1065char * __init efi_md_typeattr_format(char *buf, size_t size,
1066 const efi_memory_desc_t *md);
1067
1068/**
1069 * efi_range_is_wc - check the WC bit on an address range
1070 * @start: starting kvirt address
1071 * @len: length of range
1072 *
1073 * Consult the EFI memory map and make sure it's ok to set this range WC.
1074 * Returns true or false.
1075 */
1076static inline int efi_range_is_wc(unsigned long start, unsigned long len)
1077{
1078 unsigned long i;
1079
1080 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
1081 unsigned long paddr = __pa(start + i);
1082 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
1083 return 0;
1084 }
1085 /* The range checked out */
1086 return 1;
1087}
1088
1089#ifdef CONFIG_EFI_PCDP
1090extern int __init efi_setup_pcdp_console(char *);
1091#endif
1092
1093/*
1094 * We play games with efi_enabled so that the compiler will, if
1095 * possible, remove EFI-related code altogether.
1096 */
1097#define EFI_BOOT 0 /* Were we booted from EFI? */
1098#define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
1099#define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
1100#define EFI_MEMMAP 4 /* Can we use EFI memory map? */
1101#define EFI_64BIT 5 /* Is the firmware 64-bit? */
1102#define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
1103#define EFI_ARCH_1 7 /* First arch-specific bit */
1104#define EFI_DBG 8 /* Print additional debug info at runtime */
1105#define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
1106#define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
1107
1108#ifdef CONFIG_EFI
1109/*
1110 * Test whether the above EFI_* bits are enabled.
1111 */
1112static inline bool efi_enabled(int feature)
1113{
1114 return test_bit(feature, &efi.flags) != 0;
1115}
1116extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1117
1118extern bool efi_is_table_address(unsigned long phys_addr);
1119#else
1120static inline bool efi_enabled(int feature)
1121{
1122 return false;
1123}
1124static inline void
1125efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1126
1127static inline bool
1128efi_capsule_pending(int *reset_type)
1129{
1130 return false;
1131}
1132
1133static inline bool efi_is_table_address(unsigned long phys_addr)
1134{
1135 return false;
1136}
1137#endif
1138
1139extern int efi_status_to_err(efi_status_t status);
1140
1141/*
1142 * Variable Attributes
1143 */
1144#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
1145#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1146#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
1147#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1148#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1149#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1150#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
1151
1152#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
1153 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1154 EFI_VARIABLE_RUNTIME_ACCESS | \
1155 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1156 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1157 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1158 EFI_VARIABLE_APPEND_WRITE)
1159/*
1160 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1161 * not including trailing NUL
1162 */
1163#define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
1164
1165/*
1166 * The type of search to perform when calling boottime->locate_handle
1167 */
1168#define EFI_LOCATE_ALL_HANDLES 0
1169#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
1170#define EFI_LOCATE_BY_PROTOCOL 2
1171
1172/*
1173 * EFI Device Path information
1174 */
1175#define EFI_DEV_HW 0x01
1176#define EFI_DEV_PCI 1
1177#define EFI_DEV_PCCARD 2
1178#define EFI_DEV_MEM_MAPPED 3
1179#define EFI_DEV_VENDOR 4
1180#define EFI_DEV_CONTROLLER 5
1181#define EFI_DEV_ACPI 0x02
1182#define EFI_DEV_BASIC_ACPI 1
1183#define EFI_DEV_EXPANDED_ACPI 2
1184#define EFI_DEV_MSG 0x03
1185#define EFI_DEV_MSG_ATAPI 1
1186#define EFI_DEV_MSG_SCSI 2
1187#define EFI_DEV_MSG_FC 3
1188#define EFI_DEV_MSG_1394 4
1189#define EFI_DEV_MSG_USB 5
1190#define EFI_DEV_MSG_USB_CLASS 15
1191#define EFI_DEV_MSG_I20 6
1192#define EFI_DEV_MSG_MAC 11
1193#define EFI_DEV_MSG_IPV4 12
1194#define EFI_DEV_MSG_IPV6 13
1195#define EFI_DEV_MSG_INFINIBAND 9
1196#define EFI_DEV_MSG_UART 14
1197#define EFI_DEV_MSG_VENDOR 10
1198#define EFI_DEV_MEDIA 0x04
1199#define EFI_DEV_MEDIA_HARD_DRIVE 1
1200#define EFI_DEV_MEDIA_CDROM 2
1201#define EFI_DEV_MEDIA_VENDOR 3
1202#define EFI_DEV_MEDIA_FILE 4
1203#define EFI_DEV_MEDIA_PROTOCOL 5
1204#define EFI_DEV_BIOS_BOOT 0x05
1205#define EFI_DEV_END_PATH 0x7F
1206#define EFI_DEV_END_PATH2 0xFF
1207#define EFI_DEV_END_INSTANCE 0x01
1208#define EFI_DEV_END_ENTIRE 0xFF
1209
1210struct efi_generic_dev_path {
1211 u8 type;
1212 u8 sub_type;
1213 u16 length;
1214} __attribute ((packed));
1215
1216struct efi_dev_path {
1217 u8 type; /* can be replaced with unnamed */
1218 u8 sub_type; /* struct efi_generic_dev_path; */
1219 u16 length; /* once we've moved to -std=c11 */
1220 union {
1221 struct {
1222 u32 hid;
1223 u32 uid;
1224 } acpi;
1225 struct {
1226 u8 fn;
1227 u8 dev;
1228 } pci;
1229 };
1230} __attribute ((packed));
1231
1232#if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER)
1233struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len);
1234#endif
1235
1236static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1237{
1238 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1239 *addr &= PAGE_MASK;
1240}
1241
1242/*
1243 * EFI Variable support.
1244 *
1245 * Different firmware drivers can expose their EFI-like variables using
1246 * the following.
1247 */
1248
1249struct efivar_operations {
1250 efi_get_variable_t *get_variable;
1251 efi_get_next_variable_t *get_next_variable;
1252 efi_set_variable_t *set_variable;
1253 efi_set_variable_t *set_variable_nonblocking;
1254 efi_query_variable_store_t *query_variable_store;
1255};
1256
1257struct efivars {
1258 struct kset *kset;
1259 struct kobject *kobject;
1260 const struct efivar_operations *ops;
1261};
1262
1263/*
1264 * The maximum size of VariableName + Data = 1024
1265 * Therefore, it's reasonable to save that much
1266 * space in each part of the structure,
1267 * and we use a page for reading/writing.
1268 */
1269
1270#define EFI_VAR_NAME_LEN 1024
1271
1272struct efi_variable {
1273 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1274 efi_guid_t VendorGuid;
1275 unsigned long DataSize;
1276 __u8 Data[1024];
1277 efi_status_t Status;
1278 __u32 Attributes;
1279} __attribute__((packed));
1280
1281struct efivar_entry {
1282 struct efi_variable var;
1283 struct list_head list;
1284 struct kobject kobj;
1285 bool scanning;
1286 bool deleting;
1287};
1288
1289typedef struct {
1290 u32 reset;
1291 u32 output_string;
1292 u32 test_string;
1293} efi_simple_text_output_protocol_32_t;
1294
1295typedef struct {
1296 u64 reset;
1297 u64 output_string;
1298 u64 test_string;
1299} efi_simple_text_output_protocol_64_t;
1300
1301struct efi_simple_text_output_protocol {
1302 void *reset;
1303 efi_status_t (*output_string)(void *, void *);
1304 void *test_string;
1305};
1306
1307#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
1308#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
1309#define PIXEL_BIT_MASK 2
1310#define PIXEL_BLT_ONLY 3
1311#define PIXEL_FORMAT_MAX 4
1312
1313struct efi_pixel_bitmask {
1314 u32 red_mask;
1315 u32 green_mask;
1316 u32 blue_mask;
1317 u32 reserved_mask;
1318};
1319
1320struct efi_graphics_output_mode_info {
1321 u32 version;
1322 u32 horizontal_resolution;
1323 u32 vertical_resolution;
1324 int pixel_format;
1325 struct efi_pixel_bitmask pixel_information;
1326 u32 pixels_per_scan_line;
1327} __packed;
1328
1329struct efi_graphics_output_protocol_mode_32 {
1330 u32 max_mode;
1331 u32 mode;
1332 u32 info;
1333 u32 size_of_info;
1334 u64 frame_buffer_base;
1335 u32 frame_buffer_size;
1336} __packed;
1337
1338struct efi_graphics_output_protocol_mode_64 {
1339 u32 max_mode;
1340 u32 mode;
1341 u64 info;
1342 u64 size_of_info;
1343 u64 frame_buffer_base;
1344 u64 frame_buffer_size;
1345} __packed;
1346
1347struct efi_graphics_output_protocol_mode {
1348 u32 max_mode;
1349 u32 mode;
1350 unsigned long info;
1351 unsigned long size_of_info;
1352 u64 frame_buffer_base;
1353 unsigned long frame_buffer_size;
1354} __packed;
1355
1356struct efi_graphics_output_protocol_32 {
1357 u32 query_mode;
1358 u32 set_mode;
1359 u32 blt;
1360 u32 mode;
1361};
1362
1363struct efi_graphics_output_protocol_64 {
1364 u64 query_mode;
1365 u64 set_mode;
1366 u64 blt;
1367 u64 mode;
1368};
1369
1370struct efi_graphics_output_protocol {
1371 unsigned long query_mode;
1372 unsigned long set_mode;
1373 unsigned long blt;
1374 struct efi_graphics_output_protocol_mode *mode;
1375};
1376
1377typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
1378 struct efi_graphics_output_protocol *, u32, unsigned long *,
1379 struct efi_graphics_output_mode_info **);
1380
1381extern struct list_head efivar_sysfs_list;
1382
1383static inline void
1384efivar_unregister(struct efivar_entry *var)
1385{
1386 kobject_put(&var->kobj);
1387}
1388
1389int efivars_register(struct efivars *efivars,
1390 const struct efivar_operations *ops,
1391 struct kobject *kobject);
1392int efivars_unregister(struct efivars *efivars);
1393struct kobject *efivars_kobject(void);
1394
1395int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1396 void *data, bool duplicates, struct list_head *head);
1397
1398int efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1399int efivar_entry_remove(struct efivar_entry *entry);
1400
1401int __efivar_entry_delete(struct efivar_entry *entry);
1402int efivar_entry_delete(struct efivar_entry *entry);
1403
1404int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1405int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1406 unsigned long *size, void *data);
1407int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1408 unsigned long *size, void *data);
1409int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1410 unsigned long size, void *data, struct list_head *head);
1411int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1412 unsigned long *size, void *data, bool *set);
1413int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1414 bool block, unsigned long size, void *data);
1415
1416int efivar_entry_iter_begin(void);
1417void efivar_entry_iter_end(void);
1418
1419int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1420 struct list_head *head, void *data,
1421 struct efivar_entry **prev);
1422int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1423 struct list_head *head, void *data);
1424
1425struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1426 struct list_head *head, bool remove);
1427
1428bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1429 unsigned long data_size);
1430bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1431 size_t len);
1432
1433extern struct work_struct efivar_work;
1434void efivar_run_worker(void);
1435
1436#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1437int efivars_sysfs_init(void);
1438
1439#define EFIVARS_DATA_SIZE_MAX 1024
1440
1441#endif /* CONFIG_EFI_VARS */
1442extern bool efi_capsule_pending(int *reset_type);
1443
1444extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1445 size_t size, int *reset);
1446
1447extern int efi_capsule_update(efi_capsule_header_t *capsule,
1448 phys_addr_t *pages);
1449
1450#ifdef CONFIG_EFI_RUNTIME_MAP
1451int efi_runtime_map_init(struct kobject *);
1452int efi_get_runtime_map_size(void);
1453int efi_get_runtime_map_desc_size(void);
1454int efi_runtime_map_copy(void *buf, size_t bufsz);
1455#else
1456static inline int efi_runtime_map_init(struct kobject *kobj)
1457{
1458 return 0;
1459}
1460
1461static inline int efi_get_runtime_map_size(void)
1462{
1463 return 0;
1464}
1465
1466static inline int efi_get_runtime_map_desc_size(void)
1467{
1468 return 0;
1469}
1470
1471static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1472{
1473 return 0;
1474}
1475
1476#endif
1477
1478/* prototypes shared between arch specific and generic stub code */
1479
1480void efi_printk(efi_system_table_t *sys_table_arg, char *str);
1481
1482void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
1483 unsigned long addr);
1484
1485char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
1486 efi_loaded_image_t *image, int *cmd_line_len);
1487
1488efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
1489 struct efi_boot_memmap *map);
1490
1491efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
1492 unsigned long size, unsigned long align,
1493 unsigned long *addr);
1494
1495efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
1496 unsigned long size, unsigned long align,
1497 unsigned long *addr, unsigned long max);
1498
1499efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
1500 unsigned long *image_addr,
1501 unsigned long image_size,
1502 unsigned long alloc_size,
1503 unsigned long preferred_addr,
1504 unsigned long alignment);
1505
1506efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
1507 efi_loaded_image_t *image,
1508 char *cmd_line, char *option_string,
1509 unsigned long max_addr,
1510 unsigned long *load_addr,
1511 unsigned long *load_size);
1512
1513efi_status_t efi_parse_options(char const *cmdline);
1514
1515efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
1516 struct screen_info *si, efi_guid_t *proto,
1517 unsigned long size);
1518
1519bool efi_runtime_disabled(void);
1520extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1521
1522enum efi_secureboot_mode {
1523 efi_secureboot_mode_unset,
1524 efi_secureboot_mode_unknown,
1525 efi_secureboot_mode_disabled,
1526 efi_secureboot_mode_enabled,
1527};
1528enum efi_secureboot_mode efi_get_secureboot(efi_system_table_t *sys_table);
1529
1530#ifdef CONFIG_RESET_ATTACK_MITIGATION
1531void efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg);
1532#else
1533static inline void
1534efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg) { }
1535#endif
1536
1537/*
1538 * Arch code can implement the following three template macros, avoiding
1539 * reptition for the void/non-void return cases of {__,}efi_call_virt():
1540 *
1541 * * arch_efi_call_virt_setup()
1542 *
1543 * Sets up the environment for the call (e.g. switching page tables,
1544 * allowing kernel-mode use of floating point, if required).
1545 *
1546 * * arch_efi_call_virt()
1547 *
1548 * Performs the call. The last expression in the macro must be the call
1549 * itself, allowing the logic to be shared by the void and non-void
1550 * cases.
1551 *
1552 * * arch_efi_call_virt_teardown()
1553 *
1554 * Restores the usual kernel environment once the call has returned.
1555 */
1556
1557#define efi_call_virt_pointer(p, f, args...) \
1558({ \
1559 efi_status_t __s; \
1560 unsigned long __flags; \
1561 \
1562 arch_efi_call_virt_setup(); \
1563 \
1564 local_save_flags(__flags); \
1565 __s = arch_efi_call_virt(p, f, args); \
1566 efi_call_virt_check_flags(__flags, __stringify(f)); \
1567 \
1568 arch_efi_call_virt_teardown(); \
1569 \
1570 __s; \
1571})
1572
1573#define __efi_call_virt_pointer(p, f, args...) \
1574({ \
1575 unsigned long __flags; \
1576 \
1577 arch_efi_call_virt_setup(); \
1578 \
1579 local_save_flags(__flags); \
1580 arch_efi_call_virt(p, f, args); \
1581 efi_call_virt_check_flags(__flags, __stringify(f)); \
1582 \
1583 arch_efi_call_virt_teardown(); \
1584})
1585
1586typedef efi_status_t (*efi_exit_boot_map_processing)(
1587 efi_system_table_t *sys_table_arg,
1588 struct efi_boot_memmap *map,
1589 void *priv);
1590
1591efi_status_t efi_exit_boot_services(efi_system_table_t *sys_table,
1592 void *handle,
1593 struct efi_boot_memmap *map,
1594 void *priv,
1595 efi_exit_boot_map_processing priv_func);
1596
1597#define EFI_RANDOM_SEED_SIZE 64U
1598
1599struct linux_efi_random_seed {
1600 u32 size;
1601 u8 bits[];
1602};
1603
1604#endif /* _LINUX_EFI_H */