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efi: Fix comment for efi_mem_type() wrt absent physical addresses
[linux.git] / include / linux / efi.h
CommitLineData
b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
1da177e4
LT		 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 <[email protected]>
11 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
12 * David Mosberger-Tang <[email protected]>
13 * Stephane Eranian <[email protected]>
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>
4a3575fd 22#include <linux/pfn.h>
5ee9c198 23#include <linux/pstore.h>
60863c0d 24#include <linux/range.h>
8562c99c 25#include <linux/reboot.h>
ba7e34b1 26#include <linux/uuid.h>
2c23b73c 27#include <linux/screen_info.h>
1da177e4
LT		 28
29#include <asm/page.h>
1da177e4
LT		 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)))
5d9db883
MG		 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)))
1da177e4 41#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
dce48e35 42#define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1)))
5d9db883 43#define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
1da177e4
LT		 44
45typedef unsigned long efi_status_t;
46typedef u8 efi_bool_t;
47typedef u16 efi_char16_t; /* UNICODE character */
ed37ddff
RF		 48typedef u64 efi_physical_addr_t;
49typedef void *efi_handle_t;
1da177e4 50
89ed4865 51#if defined(CONFIG_X86_64)
8f24f8c2 52#define __efiapi __attribute__((ms_abi))
89ed4865
AB		 53#elif defined(CONFIG_X86_32)
54#define __efiapi __attribute__((regparm(0)))
8f24f8c2
AB		 55#else
56#define __efiapi
57#endif
58
2732ea0d 59#define efi_get_handle_at(array, idx) \
f958efe9 60 (efi_is_native() ? (array)[idx] \
2732ea0d
AB		 61 : (efi_handle_t)(unsigned long)((u32 *)(array))[idx])
62
63#define efi_get_handle_num(size) \
f958efe9 64 ((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32)))
2732ea0d
AB		 65
66#define for_each_efi_handle(handle, array, size, i) \
67 for (i = 0; \
68 i < efi_get_handle_num(size) && \
69 ((handle = efi_get_handle_at((array), i)) || true); \
70 i++)
71
494c704f
AB		 72/*
73 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as
74 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
75 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM),
76 * this means that firmware services invoked by the kernel may assume that
77 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that
78 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits.
79 *
80 * Note that the UEFI spec as well as some comments in the EDK2 code base
81 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be
82 * a mistake, given that no code seems to exist that actually enforces that
83 * or relies on it.
84 */
85typedef guid_t efi_guid_t __aligned(__alignof__(u32));
1da177e4
LT		 86
87#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
c0020756 88 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
1da177e4
LT		 89
90/*
91 * Generic EFI table header
92 */
93typedef struct {
94 u64 signature;
95 u32 revision;
96 u32 headersize;
97 u32 crc32;
98 u32 reserved;
99} efi_table_hdr_t;
100
101/*
102 * Memory map descriptor:
103 */
104
105/* Memory types: */
106#define EFI_RESERVED_TYPE 0
107#define EFI_LOADER_CODE 1
108#define EFI_LOADER_DATA 2
109#define EFI_BOOT_SERVICES_CODE 3
110#define EFI_BOOT_SERVICES_DATA 4
111#define EFI_RUNTIME_SERVICES_CODE 5
112#define EFI_RUNTIME_SERVICES_DATA 6
113#define EFI_CONVENTIONAL_MEMORY 7
114#define EFI_UNUSABLE_MEMORY 8
115#define EFI_ACPI_RECLAIM_MEMORY 9
116#define EFI_ACPI_MEMORY_NVS 10
117#define EFI_MEMORY_MAPPED_IO 11
118#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
119#define EFI_PAL_CODE 13
ad5fb870
DW		 120#define EFI_PERSISTENT_MEMORY 14
121#define EFI_MAX_MEMORY_TYPE 15
1da177e4
LT		 122
123/* Attribute values: */
124#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
125#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
126#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
127#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
9c97e0bd 128#define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
1da177e4
LT		 129#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
130#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
131#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
c016ca08 132#define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
b05b9f5f
TL		 133#define EFI_MEMORY_MORE_RELIABLE \
134 ((u64)0x0000000000010000ULL) /* higher reliability */
87db73ae 135#define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
fe3e5e65 136#define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */
1da177e4
LT		 137#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
138#define EFI_MEMORY_DESCRIPTOR_VERSION 1
139
140#define EFI_PAGE_SHIFT 12
ed37ddff 141#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
0100a3e6 142#define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
1da177e4 143
1da177e4
LT		 144typedef struct {
145 u32 type;
146 u32 pad;
147 u64 phys_addr;
148 u64 virt_addr;
149 u64 num_pages;
150 u64 attribute;
1da177e4
LT		 151} efi_memory_desc_t;
152
3b370237
MG		 153typedef struct {
154 efi_guid_t guid;
155 u32 headersize;
156 u32 flags;
157 u32 imagesize;
158} efi_capsule_header_t;
159
dadb57ab
JH		 160struct efi_boot_memmap {
161 efi_memory_desc_t **map;
162 unsigned long *map_size;
163 unsigned long *desc_size;
164 u32 *desc_ver;
165 unsigned long *key_ptr;
166 unsigned long *buff_size;
167};
168
f0133f3c
MF		 169/*
170 * EFI capsule flags
171 */
172#define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
173#define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
174#define EFI_CAPSULE_INITIATE_RESET 0x00040000
175
3fabd628
AB		 176struct capsule_info {
177 efi_capsule_header_t header;
f24c4d47 178 efi_capsule_header_t *capsule;
3fabd628
AB		 179 int reset_type;
180 long index;
181 size_t count;
182 size_t total_size;
f24c4d47
AB		 183 struct page **pages;
184 phys_addr_t *phys;
3fabd628
AB		 185 size_t page_bytes_remain;
186};
187
188int __efi_capsule_setup_info(struct capsule_info *cap_info);
189
bb05e4ba
MF		 190/*
191 * Allocation types for calls to boottime->allocate_pages.
192 */
193#define EFI_ALLOCATE_ANY_PAGES 0
194#define EFI_ALLOCATE_MAX_ADDRESS 1
195#define EFI_ALLOCATE_ADDRESS 2
196#define EFI_MAX_ALLOCATE_TYPE 3
197
e088a4ad 198typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
1da177e4
LT		 199
200/*
201 * Types and defines for Time Services
202 */
203#define EFI_TIME_ADJUST_DAYLIGHT 0x1
204#define EFI_TIME_IN_DAYLIGHT 0x2
205#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
206
207typedef struct {
208 u16 year;
209 u8 month;
210 u8 day;
211 u8 hour;
212 u8 minute;
213 u8 second;
214 u8 pad1;
215 u32 nanosecond;
216 s16 timezone;
217 u8 daylight;
218 u8 pad2;
219} efi_time_t;
220
221typedef struct {
222 u32 resolution;
223 u32 accuracy;
224 u8 sets_to_zero;
225} efi_time_cap_t;
226
677703ce
MF		 227typedef struct {
228 efi_table_hdr_t hdr;
229 u32 raise_tpl;
230 u32 restore_tpl;
231 u32 allocate_pages;
232 u32 free_pages;
233 u32 get_memory_map;
234 u32 allocate_pool;
235 u32 free_pool;
236 u32 create_event;
237 u32 set_timer;
238 u32 wait_for_event;
239 u32 signal_event;
240 u32 close_event;
241 u32 check_event;
242 u32 install_protocol_interface;
243 u32 reinstall_protocol_interface;
244 u32 uninstall_protocol_interface;
245 u32 handle_protocol;
246 u32 __reserved;
247 u32 register_protocol_notify;
248 u32 locate_handle;
249 u32 locate_device_path;
250 u32 install_configuration_table;
251 u32 load_image;
252 u32 start_image;
253 u32 exit;
254 u32 unload_image;
255 u32 exit_boot_services;
256 u32 get_next_monotonic_count;
257 u32 stall;
258 u32 set_watchdog_timer;
259 u32 connect_controller;
260 u32 disconnect_controller;
261 u32 open_protocol;
262 u32 close_protocol;
263 u32 open_protocol_information;
264 u32 protocols_per_handle;
265 u32 locate_handle_buffer;
266 u32 locate_protocol;
267 u32 install_multiple_protocol_interfaces;
268 u32 uninstall_multiple_protocol_interfaces;
269 u32 calculate_crc32;
270 u32 copy_mem;
271 u32 set_mem;
272 u32 create_event_ex;
273} __packed efi_boot_services_32_t;
274
f30ca6ba
MF		 275/*
276 * EFI Boot Services table
277 */
1786e830
AB		 278typedef union {
279 struct {
280 efi_table_hdr_t hdr;
281 void *raise_tpl;
282 void *restore_tpl;
8f24f8c2
AB		 283 efi_status_t (__efiapi *allocate_pages)(int, int, unsigned long,
284 efi_physical_addr_t *);
285 efi_status_t (__efiapi *free_pages)(efi_physical_addr_t,
286 unsigned long);
287 efi_status_t (__efiapi *get_memory_map)(unsigned long *, void *,
288 unsigned long *,
289 unsigned long *, u32 *);
290 efi_status_t (__efiapi *allocate_pool)(int, unsigned long,
291 void **);
292 efi_status_t (__efiapi *free_pool)(void *);
1786e830
AB		 293 void *create_event;
294 void *set_timer;
295 void *wait_for_event;
296 void *signal_event;
297 void *close_event;
298 void *check_event;
299 void *install_protocol_interface;
300 void *reinstall_protocol_interface;
301 void *uninstall_protocol_interface;
8f24f8c2
AB		 302 efi_status_t (__efiapi *handle_protocol)(efi_handle_t,
303 efi_guid_t *, void **);
1786e830
AB		 304 void *__reserved;
305 void *register_protocol_notify;
8f24f8c2
AB		 306 efi_status_t (__efiapi *locate_handle)(int, efi_guid_t *,
307 void *, unsigned long *,
308 efi_handle_t *);
1786e830 309 void *locate_device_path;
8f24f8c2
AB		 310 efi_status_t (__efiapi *install_configuration_table)(efi_guid_t *,
311 void *);
1786e830
AB		 312 void *load_image;
313 void *start_image;
314 void *exit;
315 void *unload_image;
8f24f8c2
AB		 316 efi_status_t (__efiapi *exit_boot_services)(efi_handle_t,
317 unsigned long);
1786e830
AB		 318 void *get_next_monotonic_count;
319 void *stall;
320 void *set_watchdog_timer;
321 void *connect_controller;
4444f854
MG		 322 efi_status_t (__efiapi *disconnect_controller)(efi_handle_t,
323 efi_handle_t,
324 efi_handle_t);
1786e830
AB		 325 void *open_protocol;
326 void *close_protocol;
327 void *open_protocol_information;
328 void *protocols_per_handle;
329 void *locate_handle_buffer;
8f24f8c2
AB		 330 efi_status_t (__efiapi *locate_protocol)(efi_guid_t *, void *,
331 void **);
1786e830
AB		 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 };
339 efi_boot_services_32_t mixed_mode;
f30ca6ba
MF		 340} efi_boot_services_t;
341
dd5fc854
MG		 342typedef enum {
343 EfiPciIoWidthUint8,
344 EfiPciIoWidthUint16,
345 EfiPciIoWidthUint32,
346 EfiPciIoWidthUint64,
347 EfiPciIoWidthFifoUint8,
348 EfiPciIoWidthFifoUint16,
349 EfiPciIoWidthFifoUint32,
350 EfiPciIoWidthFifoUint64,
351 EfiPciIoWidthFillUint8,
352 EfiPciIoWidthFillUint16,
353 EfiPciIoWidthFillUint32,
354 EfiPciIoWidthFillUint64,
355 EfiPciIoWidthMaximum
356} EFI_PCI_IO_PROTOCOL_WIDTH;
357
358typedef enum {
359 EfiPciIoAttributeOperationGet,
360 EfiPciIoAttributeOperationSet,
361 EfiPciIoAttributeOperationEnable,
362 EfiPciIoAttributeOperationDisable,
363 EfiPciIoAttributeOperationSupported,
364 EfiPciIoAttributeOperationMaximum
365} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
366
677703ce
MF		 367typedef struct {
368 u32 read;
369 u32 write;
370} efi_pci_io_protocol_access_32_t;
371
1786e830
AB		 372typedef union efi_pci_io_protocol efi_pci_io_protocol_t;
373
374typedef
8f24f8c2
AB		 375efi_status_t (__efiapi *efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *,
376 EFI_PCI_IO_PROTOCOL_WIDTH,
377 u32 offset,
378 unsigned long count,
379 void *buffer);
1786e830 380
dd5fc854
MG		 381typedef struct {
382 void *read;
383 void *write;
384} efi_pci_io_protocol_access_t;
385
1786e830
AB		 386typedef struct {
387 efi_pci_io_protocol_cfg_t read;
388 efi_pci_io_protocol_cfg_t write;
389} efi_pci_io_protocol_config_access_t;
390
1786e830
AB		 391union efi_pci_io_protocol {
392 struct {
393 void *poll_mem;
394 void *poll_io;
395 efi_pci_io_protocol_access_t mem;
396 efi_pci_io_protocol_access_t io;
397 efi_pci_io_protocol_config_access_t pci;
398 void *copy_mem;
399 void *map;
400 void *unmap;
401 void *allocate_buffer;
402 void *free_buffer;
403 void *flush;
8f24f8c2
AB		 404 efi_status_t (__efiapi *get_location)(efi_pci_io_protocol_t *,
405 unsigned long *segment_nr,
406 unsigned long *bus_nr,
407 unsigned long *device_nr,
408 unsigned long *func_nr);
1786e830
AB		 409 void *attributes;
410 void *get_bar_attributes;
411 void *set_bar_attributes;
412 uint64_t romsize;
413 void *romimage;
414 };
415 struct {
416 u32 poll_mem;
417 u32 poll_io;
418 efi_pci_io_protocol_access_32_t mem;
419 efi_pci_io_protocol_access_32_t io;
420 efi_pci_io_protocol_access_32_t pci;
421 u32 copy_mem;
422 u32 map;
423 u32 unmap;
424 u32 allocate_buffer;
425 u32 free_buffer;
426 u32 flush;
427 u32 get_location;
428 u32 attributes;
429 u32 get_bar_attributes;
430 u32 set_bar_attributes;
431 u64 romsize;
432 u32 romimage;
433 } mixed_mode;
434};
dd5fc854
MG		 435
436#define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
437#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
438#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
439#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
440#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
441#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
442#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
443#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
444#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
445#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
446#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
447#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
448#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
449#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
450#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
451#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
452#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
453#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
454#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
455
1786e830
AB		 456struct efi_dev_path;
457
458typedef union apple_properties_protocol apple_properties_protocol_t;
459
460union apple_properties_protocol {
461 struct {
462 unsigned long version;
8f24f8c2
AB		 463 efi_status_t (__efiapi *get)(apple_properties_protocol_t *,
464 struct efi_dev_path *,
465 efi_char16_t *, void *, u32 *);
466 efi_status_t (__efiapi *set)(apple_properties_protocol_t *,
467 struct efi_dev_path *,
468 efi_char16_t *, void *, u32);
469 efi_status_t (__efiapi *del)(apple_properties_protocol_t *,
470 struct efi_dev_path *,
471 efi_char16_t *);
472 efi_status_t (__efiapi *get_all)(apple_properties_protocol_t *,
473 void *buffer, u32 *);
1786e830
AB		 474 };
475 struct {
476 u32 version;
477 u32 get;
478 u32 set;
479 u32 del;
480 u32 get_all;
481 } mixed_mode;
482};
483
33b6d034
TW		 484typedef u32 efi_tcg2_event_log_format;
485
1786e830
AB		 486typedef union efi_tcg2_protocol efi_tcg2_protocol_t;
487
488union efi_tcg2_protocol {
489 struct {
490 void *get_capability;
8f24f8c2
AB		 491 efi_status_t (__efiapi *get_event_log)(efi_handle_t,
492 efi_tcg2_event_log_format,
493 efi_physical_addr_t *,
494 efi_physical_addr_t *,
495 efi_bool_t *);
1786e830
AB		 496 void *hash_log_extend_event;
497 void *submit_command;
498 void *get_active_pcr_banks;
499 void *set_active_pcr_banks;
500 void *get_result_of_set_active_pcr_banks;
501 };
502 struct {
503 u32 get_capability;
504 u32 get_event_log;
505 u32 hash_log_extend_event;
506 u32 submit_command;
507 u32 get_active_pcr_banks;
508 u32 set_active_pcr_banks;
509 u32 get_result_of_set_active_pcr_banks;
510 } mixed_mode;
511};
33b6d034 512
1da177e4
LT		 513/*
514 * Types and defines for EFI ResetSystem
515 */
516#define EFI_RESET_COLD 0
517#define EFI_RESET_WARM 1
518#define EFI_RESET_SHUTDOWN 2
519
520/*
521 * EFI Runtime Services table
522 */
523#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
524#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
525
677703ce
MF		 526typedef struct {
527 efi_table_hdr_t hdr;
528 u32 get_time;
529 u32 set_time;
530 u32 get_wakeup_time;
531 u32 set_wakeup_time;
532 u32 set_virtual_address_map;
533 u32 convert_pointer;
534 u32 get_variable;
535 u32 get_next_variable;
536 u32 set_variable;
537 u32 get_next_high_mono_count;
538 u32 reset_system;
539 u32 update_capsule;
540 u32 query_capsule_caps;
541 u32 query_variable_info;
542} efi_runtime_services_32_t;
543
1da177e4
LT		 544typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
545typedef efi_status_t efi_set_time_t (efi_time_t *tm);
546typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
547 efi_time_t *tm);
548typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
549typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
550 unsigned long *data_size, void *data);
551typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
552 efi_guid_t *vendor);
553typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
f7a2d73f 554 u32 attr, unsigned long data_size,
1da177e4
LT		 555 void *data);
556typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
557typedef void efi_reset_system_t (int reset_type, efi_status_t status,
558 unsigned long data_size, efi_char16_t *data);
559typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
560 unsigned long descriptor_size,
561 u32 descriptor_version,
562 efi_memory_desc_t *virtual_map);
3b370237
MG		 563typedef efi_status_t efi_query_variable_info_t(u32 attr,
564 u64 *storage_space,
565 u64 *remaining_space,
566 u64 *max_variable_size);
567typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
568 unsigned long count,
569 unsigned long sg_list);
570typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
571 unsigned long count,
572 u64 *max_size,
573 int *reset_type);
ca0e30dc
AB		 574typedef efi_status_t efi_query_variable_store_t(u32 attributes,
575 unsigned long size,
576 bool nonblocking);
1da177e4 577
1786e830
AB		 578typedef union {
579 struct {
8f24f8c2
AB		 580 efi_table_hdr_t hdr;
581 efi_get_time_t __efiapi *get_time;
582 efi_set_time_t __efiapi *set_time;
583 efi_get_wakeup_time_t __efiapi *get_wakeup_time;
584 efi_set_wakeup_time_t __efiapi *set_wakeup_time;
585 efi_set_virtual_address_map_t __efiapi *set_virtual_address_map;
586 void *convert_pointer;
587 efi_get_variable_t __efiapi *get_variable;
588 efi_get_next_variable_t __efiapi *get_next_variable;
589 efi_set_variable_t __efiapi *set_variable;
590 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count;
591 efi_reset_system_t __efiapi *reset_system;
592 efi_update_capsule_t __efiapi *update_capsule;
593 efi_query_capsule_caps_t __efiapi *query_capsule_caps;
594 efi_query_variable_info_t __efiapi *query_variable_info;
1786e830
AB		 595 };
596 efi_runtime_services_32_t mixed_mode;
c4c39c70
AB		 597} efi_runtime_services_t;
598
022ee6c5
AB		 599void efi_native_runtime_setup(void);
600
1da177e4 601/*
54fd11fe
PJ		 602 * EFI Configuration Table and GUID definitions
603 *
7fb2b43c
IM		 604 * These are all defined in a single line to make them easier to
605 * grep for and to see them at a glance - while still having a
606 * similar structure to the definitions in the spec.
607 *
608 * Here's how they are structured:
54fd11fe
PJ		 609 *
610 * GUID: 12345678-1234-1234-1234-123456789012
611 * Spec:
612 * #define EFI_SOME_PROTOCOL_GUID \
613 * {0x12345678,0x1234,0x1234,\
614 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
615 * Here:
7fb2b43c
IM		 616 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
617 * ^ tabs ^extra space
618 *
619 * Note that the 'extra space' separates the values at the same place
620 * where the UEFI SPEC breaks the line.
1da177e4 621 */
7fb2b43c
IM		 622#define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
623#define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
624#define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
625#define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
626#define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
627#define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
628#define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
629#define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
630#define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
631#define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
632#define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
633#define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
634#define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
635#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
636#define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
637#define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
638#define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
639#define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
640#define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
641#define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
642#define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
643#define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
568bc4e8 644#define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
7fb2b43c
IM		 645#define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
646#define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
58c5475a 647#define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
33b6d034 648#define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
fc372064 649
e58910cd
JB		 650#define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
651#define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
652
5c126ba2
DH		 653#define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
654#define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
655#define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
656
801820be
AB		 657/*
658 * This GUID is used to pass to the kernel proper the struct screen_info
659 * structure that was populated by the stub based on the GOP protocol instance
660 * associated with ConOut
661 */
7fb2b43c
IM		 662#define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
663#define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
63625988 664#define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
33b6d034 665#define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
c46f3405 666#define LINUX_EFI_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
71e0940d 667#define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
06f7d4a1 668
1c5fecb6
N		 669/* OEM GUIDs */
670#define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
671
1adbfa35
OJ		 672typedef struct {
673 efi_guid_t guid;
674 u64 table;
675} efi_config_table_64_t;
676
677typedef struct {
678 efi_guid_t guid;
679 u32 table;
680} efi_config_table_32_t;
681
1786e830
AB		 682typedef union {
683 struct {
684 efi_guid_t guid;
f958efe9 685 void *table;
1786e830
AB		 686 };
687 efi_config_table_32_t mixed_mode;
1da177e4
LT		 688} efi_config_table_t;
689
272686bf
LL		 690typedef struct {
691 efi_guid_t guid;
692 const char *name;
693 unsigned long *ptr;
694} efi_config_table_type_t;
695
1da177e4 696#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
1da177e4 697
3b370237
MG		 698#define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
699#define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
700#define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
701#define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
702#define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
703#define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
704
1adbfa35
OJ		 705typedef struct {
706 efi_table_hdr_t hdr;
707 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
708 u32 fw_revision;
709 u32 __pad1;
710 u64 con_in_handle;
711 u64 con_in;
712 u64 con_out_handle;
713 u64 con_out;
714 u64 stderr_handle;
715 u64 stderr;
716 u64 runtime;
717 u64 boottime;
718 u32 nr_tables;
719 u32 __pad2;
720 u64 tables;
721} efi_system_table_64_t;
722
723typedef struct {
724 efi_table_hdr_t hdr;
725 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
726 u32 fw_revision;
727 u32 con_in_handle;
728 u32 con_in;
729 u32 con_out_handle;
730 u32 con_out;
731 u32 stderr_handle;
732 u32 stderr;
733 u32 runtime;
734 u32 boottime;
735 u32 nr_tables;
736 u32 tables;
737} efi_system_table_32_t;
738
960a8d01
AB		 739typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
740
1786e830
AB		 741typedef union {
742 struct {
743 efi_table_hdr_t hdr;
744 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
745 u32 fw_revision;
746 unsigned long con_in_handle;
747 unsigned long con_in;
748 unsigned long con_out_handle;
960a8d01 749 efi_simple_text_output_protocol_t *con_out;
1786e830
AB		 750 unsigned long stderr_handle;
751 unsigned long stderr;
752 efi_runtime_services_t *runtime;
753 efi_boot_services_t *boottime;
754 unsigned long nr_tables;
755 unsigned long tables;
756 };
757 efi_system_table_32_t mixed_mode;
1da177e4
LT		 758} efi_system_table_t;
759
9479c7ce
MF		 760/*
761 * Architecture independent structure for describing a memory map for the
762 * benefit of efi_memmap_init_early(), saving us the need to pass four
763 * parameters.
764 */
765struct efi_memory_map_data {
766 phys_addr_t phys_map;
767 unsigned long size;
768 unsigned long desc_version;
769 unsigned long desc_size;
770};
771
1da177e4 772struct efi_memory_map {
44511fb9 773 phys_addr_t phys_map;
7ae65fd3
MT		 774 void *map;
775 void *map_end;
1da177e4
LT		 776 int nr_map;
777 unsigned long desc_version;
7ae65fd3 778 unsigned long desc_size;
dca0f971 779 bool late;
1da177e4
LT		 780};
781
60863c0d
MF		 782struct efi_mem_range {
783 struct range range;
784 u64 attribute;
1da177e4
LT		 785};
786
0302f71c
MS		 787struct efi_fdt_params {
788 u64 system_table;
789 u64 mmap;
790 u32 mmap_size;
791 u32 desc_size;
792 u32 desc_ver;
793};
794
14e900c7
AB		 795typedef struct {
796 u32 revision;
797 efi_handle_t parent_handle;
798 efi_system_table_t *system_table;
799 efi_handle_t device_handle;
800 void *file_path;
801 void *reserved;
802 u32 load_options_size;
803 void *load_options;
804 void *image_base;
805 __aligned_u64 image_size;
806 unsigned int image_code_type;
807 unsigned int image_data_type;
808 efi_status_t ( __efiapi *unload)(efi_handle_t image_handle);
809} efi_loaded_image_t;
55839d51
MF		 810
811typedef struct {
812 u64 size;
813 u64 file_size;
814 u64 phys_size;
815 efi_time_t create_time;
816 efi_time_t last_access_time;
817 efi_time_t modification_time;
818 __aligned_u64 attribute;
819 efi_char16_t filename[1];
820} efi_file_info_t;
821
14e900c7
AB		 822typedef struct efi_file_handle efi_file_handle_t;
823
824struct efi_file_handle {
825 u64 revision;
826 efi_status_t (__efiapi *open)(efi_file_handle_t *,
827 efi_file_handle_t **,
828 efi_char16_t *, u64, u64);
829 efi_status_t (__efiapi *close)(efi_file_handle_t *);
830 void *delete;
831 efi_status_t (__efiapi *read)(efi_file_handle_t *,
832 unsigned long *, void *);
833 void *write;
834 void *get_position;
835 void *set_position;
836 efi_status_t (__efiapi *get_info)(efi_file_handle_t *,
837 efi_guid_t *, unsigned long *,
838 void *);
839 void *set_info;
840 void *flush;
1786e830 841};
55839d51 842
14e900c7 843typedef struct efi_file_io_interface efi_file_io_interface_t;
1786e830 844
14e900c7
AB		 845struct efi_file_io_interface {
846 u64 revision;
847 int (__efiapi *open_volume)(efi_file_io_interface_t *,
848 efi_file_handle_t **);
e8bd5ddf 849};
ed37ddff 850
55839d51
MF		 851#define EFI_FILE_MODE_READ 0x0000000000000001
852#define EFI_FILE_MODE_WRITE 0x0000000000000002
853#define EFI_FILE_MODE_CREATE 0x8000000000000000
854
bf924863
AB		 855typedef struct {
856 u32 version;
857 u32 length;
858 u64 memory_protection_attribute;
859} efi_properties_table_t;
860
861#define EFI_PROPERTIES_TABLE_VERSION 0x00010000
862#define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
863
b2c99e3c
BH		 864#define EFI_INVALID_TABLE_ADDR (~0UL)
865
a604af07
AB		 866typedef struct {
867 u32 version;
868 u32 num_entries;
869 u32 desc_size;
870 u32 reserved;
871 efi_memory_desc_t entry[0];
872} efi_memory_attributes_table_t;
873
5c126ba2
DH		 874typedef struct {
875 efi_guid_t signature_owner;
876 u8 signature_data[];
877} efi_signature_data_t;
878
879typedef struct {
880 efi_guid_t signature_type;
881 u32 signature_list_size;
882 u32 signature_header_size;
883 u32 signature_size;
884 u8 signature_header[];
885 /* efi_signature_data_t signatures[][] */
886} efi_signature_list_t;
887
888typedef u8 efi_sha256_hash_t[32];
889
890typedef struct {
891 efi_sha256_hash_t to_be_signed_hash;
892 efi_time_t time_of_revocation;
893} efi_cert_x509_sha256_t;
894
1da177e4
LT		 895/*
896 * All runtime access to EFI goes through this structure:
897 */
898extern struct efi {
899 efi_system_table_t *systab; /* EFI system table */
3b370237 900 unsigned int runtime_version; /* Runtime services version */
b2c99e3c
BH		 901 unsigned long mps; /* MPS table */
902 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
903 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
e1ccbbc9
AB		 904 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
905 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
b2c99e3c
BH		 906 unsigned long boot_info; /* boot info table */
907 unsigned long hcdp; /* HCDP table */
908 unsigned long uga; /* UGA table */
a0998eb1
DY		 909 unsigned long fw_vendor; /* fw_vendor */
910 unsigned long runtime; /* runtime table */
911 unsigned long config_table; /* config tables */
0bb54905 912 unsigned long esrt; /* ESRT table */
bf924863 913 unsigned long properties_table; /* properties table */
a604af07 914 unsigned long mem_attr_table; /* memory attributes table */
63625988 915 unsigned long rng_seed; /* UEFI firmware random seed */
33b6d034 916 unsigned long tpm_log; /* TPM2 Event Log table */
c46f3405 917 unsigned long tpm_final_log; /* TPM2 Final Events Log table */
71e0940d 918 unsigned long mem_reserve; /* Linux EFI memreserve table */
1da177e4
LT		 919 efi_get_time_t *get_time;
920 efi_set_time_t *set_time;
921 efi_get_wakeup_time_t *get_wakeup_time;
922 efi_set_wakeup_time_t *set_wakeup_time;
923 efi_get_variable_t *get_variable;
924 efi_get_next_variable_t *get_next_variable;
925 efi_set_variable_t *set_variable;
70d2a3cf 926 efi_set_variable_t *set_variable_nonblocking;
3b370237 927 efi_query_variable_info_t *query_variable_info;
d3cac1f8 928 efi_query_variable_info_t *query_variable_info_nonblocking;
3b370237
MG		 929 efi_update_capsule_t *update_capsule;
930 efi_query_capsule_caps_t *query_capsule_caps;
1da177e4
LT		 931 efi_get_next_high_mono_count_t *get_next_high_mono_count;
932 efi_reset_system_t *reset_system;
884f4f66 933 struct efi_memory_map memmap;
3e909599 934 unsigned long flags;
1da177e4
LT		 935} efi;
936
7e904a91
SP		 937extern struct mm_struct efi_mm;
938
1da177e4
LT		 939static inline int
940efi_guidcmp (efi_guid_t left, efi_guid_t right)
941{
942 return memcmp(&left, &right, sizeof (efi_guid_t));
943}
944
945static inline char *
26e02272 946efi_guid_to_str(efi_guid_t *guid, char *out)
1da177e4 947{
925ede0b 948 sprintf(out, "%pUl", guid->b);
1da177e4
LT		 949 return out;
950}
951
952extern void efi_init (void);
953extern void *efi_get_pal_addr (void);
954extern void efi_map_pal_code (void);
1da177e4 955extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
70f4f935 956extern void efi_gettimeofday (struct timespec64 *ts);
1da177e4 957extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
78510792 958#ifdef CONFIG_X86
ca0e30dc
AB		 959extern efi_status_t efi_query_variable_store(u32 attributes,
960 unsigned long size,
961 bool nonblocking);
78510792 962#else
a6e4d5a0 963
ca0e30dc
AB		 964static inline efi_status_t efi_query_variable_store(u32 attributes,
965 unsigned long size,
966 bool nonblocking)
a6e4d5a0
MF		 967{
968 return EFI_SUCCESS;
969}
78510792 970#endif
7bc90e01 971extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
9479c7ce 972
20b1e22d 973extern phys_addr_t __init efi_memmap_alloc(unsigned int num_entries);
9479c7ce 974extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
dca0f971 975extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
9479c7ce 976extern void __init efi_memmap_unmap(void);
c45f4da3 977extern int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map);
60863c0d
MF		 978extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
979 struct range *range);
980extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
981 void *buf, struct efi_mem_range *mem);
9479c7ce 982
272686bf 983extern int efi_config_init(efi_config_table_type_t *arch_tables);
3846c158 984#ifdef CONFIG_EFI_ESRT
0bb54905 985extern void __init efi_esrt_init(void);
3846c158
PJ		 986#else
987static inline void efi_esrt_init(void) { }
988#endif
7bb68410
AB		 989extern int efi_config_parse_tables(void *config_tables, int count, int sz,
990 efi_config_table_type_t *arch_tables);
1da177e4 991extern u64 efi_get_iobase (void);
f99afd08 992extern int efi_mem_type(unsigned long phys_addr);
1da177e4 993extern u64 efi_mem_attributes (unsigned long phys_addr);
32e62c63 994extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
1da177e4 995extern int __init efi_uart_console_only (void);
0bb54905
PJ		 996extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
997extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
816e7612 998extern void efi_mem_reserve(phys_addr_t addr, u64 size);
a23d3bb0 999extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
1da177e4 1000extern void efi_initialize_iomem_resources(struct resource *code_resource,
00bf4098 1001 struct resource *data_resource, struct resource *bss_resource);
7968c0e3 1002extern int efi_get_fdt_params(struct efi_fdt_params *params);
0bb54905 1003extern struct kobject *efi_kobj;
1da177e4 1004
44be28e9 1005extern int efi_reboot_quirk_mode;
0c5ed61a
MF		 1006extern bool efi_poweroff_required(void);
1007
0f96a99d
TI		 1008#ifdef CONFIG_EFI_FAKE_MEMMAP
1009extern void __init efi_fake_memmap(void);
1010#else
1011static inline void efi_fake_memmap(void) { }
1012#endif
1013
10f0d2f5
AB		 1014/*
1015 * efi_memattr_perm_setter - arch specific callback function passed into
1016 * efi_memattr_apply_permissions() that updates the
1017 * mapping permissions described by the second
1018 * argument in the page tables referred to by the
1019 * first argument.
1020 */
1021typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
1022
1023extern int efi_memattr_init(void);
1024extern int efi_memattr_apply_permissions(struct mm_struct *mm,
1025 efi_memattr_perm_setter fn);
1026
02e43c2d
BH		 1027/*
1028 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
1029 * @map: the start of efi memmap
1030 * @desc_size: the size of space for each EFI memmap descriptor
1031 * @n: the index of efi memmap descriptor
1032 *
1033 * EFI boot service provides the GetMemoryMap() function to get a copy of the
1034 * current memory map which is an array of memory descriptors, each of
1035 * which describes a contiguous block of memory. It also gets the size of the
1036 * map, and the size of each descriptor, etc.
1037 *
1038 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
1039 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
1040 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
1041 * MUST use the returned size of the descriptor to find the start of each
1042 * efi_memory_memdesc_t in the memory map array. This should only be used
1043 * during bootup since for_each_efi_memory_desc_xxx() is available after the
1044 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
1045 */
1046#define efi_early_memdesc_ptr(map, desc_size, n) \
1047 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
1048
e885cd80 1049/* Iterate through an efi_memory_map */
78ce248f 1050#define for_each_efi_memory_desc_in_map(m, md) \
e885cd80 1051 for ((md) = (m)->map; \
d4c4fed0 1052 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
e885cd80
MS		 1053 (md) = (void *)(md) + (m)->desc_size)
1054
78ce248f
MF		 1055/**
1056 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1057 * @md: the efi_memory_desc_t * iterator
1058 *
1059 * Once the loop finishes @md must not be accessed.
1060 */
1061#define for_each_efi_memory_desc(md) \
884f4f66 1062 for_each_efi_memory_desc_in_map(&efi.memmap, md)
78ce248f 1063
98d2a6ca
LE		 1064/*
1065 * Format an EFI memory descriptor's type and attributes to a user-provided
1066 * character buffer, as per snprintf(), and return the buffer.
1067 */
1068char * __init efi_md_typeattr_format(char *buf, size_t size,
1069 const efi_memory_desc_t *md);
1070
0bc9ae39
DH		 1071
1072typedef void (*efi_element_handler_t)(const char *source,
1073 const void *element_data,
1074 size_t element_size);
1075extern int __init parse_efi_signature_list(
1076 const char *source,
1077 const void *data, size_t size,
1078 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
1079
1da177e4
LT		 1080/**
1081 * efi_range_is_wc - check the WC bit on an address range
1082 * @start: starting kvirt address
1083 * @len: length of range
1084 *
1085 * Consult the EFI memory map and make sure it's ok to set this range WC.
1086 * Returns true or false.
1087 */
1088static inline int efi_range_is_wc(unsigned long start, unsigned long len)
1089{
986a80d5 1090 unsigned long i;
1da177e4
LT		 1091
1092 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
1093 unsigned long paddr = __pa(start + i);
1094 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
1095 return 0;
1096 }
1097 /* The range checked out */
1098 return 1;
1099}
1100
1101#ifdef CONFIG_EFI_PCDP
1102extern int __init efi_setup_pcdp_console(char *);
1103#endif
1104
1105/*
83e68189
MF		 1106 * We play games with efi_enabled so that the compiler will, if
1107 * possible, remove EFI-related code altogether.
1da177e4 1108 */
83e68189 1109#define EFI_BOOT 0 /* Were we booted from EFI? */
83e68189
MF		 1110#define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
1111#define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
1112#define EFI_MEMMAP 4 /* Can we use EFI memory map? */
1113#define EFI_64BIT 5 /* Is the firmware 64-bit? */
9f27bc54
DK		 1114#define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
1115#define EFI_ARCH_1 7 /* First arch-specific bit */
fed6cefe 1116#define EFI_DBG 8 /* Print additional debug info at runtime */
a1041713 1117#define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
a19ebf59 1118#define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
b617c526 1119#define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */
83e68189 1120
1da177e4 1121#ifdef CONFIG_EFI
3e909599
MF		 1122/*
1123 * Test whether the above EFI_* bits are enabled.
1124 */
1125static inline bool efi_enabled(int feature)
1126{
1127 return test_bit(feature, &efi.flags) != 0;
1128}
8562c99c 1129extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
b617c526
DW		 1130
1131bool __pure __efi_soft_reserve_enabled(void);
1132
1133static inline bool __pure efi_soft_reserve_enabled(void)
1134{
1135 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
1136 && __efi_soft_reserve_enabled();
1137}
1da177e4 1138#else
3e909599 1139static inline bool efi_enabled(int feature)
83e68189 1140{
3e909599 1141 return false;
83e68189 1142}
8562c99c
MF		 1143static inline void
1144efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
87615a34
MF		 1145
1146static inline bool
1147efi_capsule_pending(int *reset_type)
1148{
1149 return false;
1150}
b617c526
DW		 1151
1152static inline bool efi_soft_reserve_enabled(void)
1153{
1154 return false;
1155}
1da177e4
LT		 1156#endif
1157
806b0351
MF		 1158extern int efi_status_to_err(efi_status_t status);
1159
1da177e4
LT		 1160/*
1161 * Variable Attributes
1162 */
1163#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
1164#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1165#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
41b3254c
MG		 1166#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1167#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1168#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1169#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
1170
1171#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
1172 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1173 EFI_VARIABLE_RUNTIME_ACCESS | \
1174 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1175 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1176 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1177 EFI_VARIABLE_APPEND_WRITE)
e14ab23d
MF		 1178/*
1179 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1180 * not including trailing NUL
1181 */
ba7e34b1 1182#define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
e14ab23d 1183
e2527a7c
MF		 1184/*
1185 * The type of search to perform when calling boottime->locate_handle
1186 */
1187#define EFI_LOCATE_ALL_HANDLES 0
1188#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
1189#define EFI_LOCATE_BY_PROTOCOL 2
1190
1da177e4
LT		 1191/*
1192 * EFI Device Path information
1193 */
1194#define EFI_DEV_HW 0x01
1195#define EFI_DEV_PCI 1
1196#define EFI_DEV_PCCARD 2
1197#define EFI_DEV_MEM_MAPPED 3
1198#define EFI_DEV_VENDOR 4
1199#define EFI_DEV_CONTROLLER 5
1200#define EFI_DEV_ACPI 0x02
1201#define EFI_DEV_BASIC_ACPI 1
1202#define EFI_DEV_EXPANDED_ACPI 2
1203#define EFI_DEV_MSG 0x03
1204#define EFI_DEV_MSG_ATAPI 1
1205#define EFI_DEV_MSG_SCSI 2
1206#define EFI_DEV_MSG_FC 3
1207#define EFI_DEV_MSG_1394 4
1208#define EFI_DEV_MSG_USB 5
1209#define EFI_DEV_MSG_USB_CLASS 15
1210#define EFI_DEV_MSG_I20 6
1211#define EFI_DEV_MSG_MAC 11
1212#define EFI_DEV_MSG_IPV4 12
1213#define EFI_DEV_MSG_IPV6 13
1214#define EFI_DEV_MSG_INFINIBAND 9
1215#define EFI_DEV_MSG_UART 14
1216#define EFI_DEV_MSG_VENDOR 10
1217#define EFI_DEV_MEDIA 0x04
1218#define EFI_DEV_MEDIA_HARD_DRIVE 1
1219#define EFI_DEV_MEDIA_CDROM 2
1220#define EFI_DEV_MEDIA_VENDOR 3
1221#define EFI_DEV_MEDIA_FILE 4
1222#define EFI_DEV_MEDIA_PROTOCOL 5
1223#define EFI_DEV_BIOS_BOOT 0x05
1224#define EFI_DEV_END_PATH 0x7F
1225#define EFI_DEV_END_PATH2 0xFF
1226#define EFI_DEV_END_INSTANCE 0x01
1227#define EFI_DEV_END_ENTIRE 0xFF
1228
1229struct efi_generic_dev_path {
1230 u8 type;
1231 u8 sub_type;
1232 u16 length;
1233} __attribute ((packed));
1234
46cd4b75
LW		 1235struct efi_dev_path {
1236 u8 type; /* can be replaced with unnamed */
1237 u8 sub_type; /* struct efi_generic_dev_path; */
1238 u16 length; /* once we've moved to -std=c11 */
1239 union {
1240 struct {
1241 u32 hid;
1242 u32 uid;
1243 } acpi;
1244 struct {
1245 u8 fn;
1246 u8 dev;
1247 } pci;
1248 };
1249} __attribute ((packed));
1250
1251#if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER)
1252struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len);
1253#endif
1254
4a3575fd
YH		 1255static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1256{
1257 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1258 *addr &= PAGE_MASK;
1259}
1260
4fc756bd
MW		 1261/*
1262 * EFI Variable support.
1263 *
1264 * Different firmware drivers can expose their EFI-like variables using
1265 * the following.
1266 */
1267
1268struct efivar_operations {
1269 efi_get_variable_t *get_variable;
1270 efi_get_next_variable_t *get_next_variable;
1271 efi_set_variable_t *set_variable;
70d2a3cf 1272 efi_set_variable_t *set_variable_nonblocking;
a6e4d5a0 1273 efi_query_variable_store_t *query_variable_store;
4fc756bd
MW		 1274};
1275
1276struct efivars {
4fc756bd 1277 struct kset *kset;
605e70c7 1278 struct kobject *kobject;
4fc756bd
MW		 1279 const struct efivar_operations *ops;
1280};
1281
e14ab23d
MF		 1282/*
1283 * The maximum size of VariableName + Data = 1024
1284 * Therefore, it's reasonable to save that much
1285 * space in each part of the structure,
1286 * and we use a page for reading/writing.
1287 */
1288
a5d92ad3
MF		 1289#define EFI_VAR_NAME_LEN 1024
1290
e14ab23d 1291struct efi_variable {
a5d92ad3 1292 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
e14ab23d
MF		 1293 efi_guid_t VendorGuid;
1294 unsigned long DataSize;
1295 __u8 Data[1024];
1296 efi_status_t Status;
1297 __u32 Attributes;
1298} __attribute__((packed));
1299
1300struct efivar_entry {
1301 struct efi_variable var;
1302 struct list_head list;
1303 struct kobject kobj;
e0d59733
SA		 1304 bool scanning;
1305 bool deleting;
e14ab23d
MF		 1306};
1307
1786e830
AB		 1308union efi_simple_text_output_protocol {
1309 struct {
1310 void *reset;
8f24f8c2
AB		 1311 efi_status_t (__efiapi *output_string)(efi_simple_text_output_protocol_t *,
1312 efi_char16_t *);
1786e830
AB		 1313 void *test_string;
1314 };
1315 struct {
1316 u32 reset;
1317 u32 output_string;
1318 u32 test_string;
1319 } mixed_mode;
ed37ddff
RF		 1320};
1321
fc372064
AB		 1322#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
1323#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
1324#define PIXEL_BIT_MASK 2
1325#define PIXEL_BLT_ONLY 3
1326#define PIXEL_FORMAT_MAX 4
1327
44c84b4a 1328typedef struct {
fc372064
AB		 1329 u32 red_mask;
1330 u32 green_mask;
1331 u32 blue_mask;
1332 u32 reserved_mask;
44c84b4a 1333} efi_pixel_bitmask_t;
fc372064 1334
44c84b4a 1335typedef struct {
fc372064
AB		 1336 u32 version;
1337 u32 horizontal_resolution;
1338 u32 vertical_resolution;
1339 int pixel_format;
44c84b4a 1340 efi_pixel_bitmask_t pixel_information;
fc372064 1341 u32 pixels_per_scan_line;
44c84b4a 1342} efi_graphics_output_mode_info_t;
fc372064 1343
1786e830
AB		 1344typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t;
1345
1346union efi_graphics_output_protocol_mode {
1347 struct {
1348 u32 max_mode;
1349 u32 mode;
1350 efi_graphics_output_mode_info_t *info;
1351 unsigned long size_of_info;
1352 efi_physical_addr_t frame_buffer_base;
1353 unsigned long frame_buffer_size;
1354 };
1355 struct {
1356 u32 max_mode;
1357 u32 mode;
1358 u32 info;
1359 u32 size_of_info;
1360 u64 frame_buffer_base;
1361 u32 frame_buffer_size;
1362 } mixed_mode;
1363};
fc372064 1364
1786e830
AB		 1365typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t;
1366
1367union efi_graphics_output_protocol {
1368 struct {
1369 void *query_mode;
1370 void *set_mode;
1371 void *blt;
1372 efi_graphics_output_protocol_mode_t *mode;
1373 };
1374 struct {
1375 u32 query_mode;
1376 u32 set_mode;
1377 u32 blt;
1378 u32 mode;
1379 } mixed_mode;
1380};
fc372064 1381
04851772
MF		 1382extern struct list_head efivar_sysfs_list;
1383
1384static inline void
1385efivar_unregister(struct efivar_entry *var)
1386{
1387 kobject_put(&var->kobj);
1388}
1389
e14ab23d 1390int efivars_register(struct efivars *efivars,
4fc756bd 1391 const struct efivar_operations *ops,
e14ab23d
MF		 1392 struct kobject *kobject);
1393int efivars_unregister(struct efivars *efivars);
1394struct kobject *efivars_kobject(void);
1395
1396int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1cfd6316 1397 void *data, bool duplicates, struct list_head *head);
e14ab23d 1398
21b3ddd3
SC		 1399int efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1400int efivar_entry_remove(struct efivar_entry *entry);
e14ab23d
MF		 1401
1402int __efivar_entry_delete(struct efivar_entry *entry);
1403int efivar_entry_delete(struct efivar_entry *entry);
1404
e14ab23d 1405int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
8a415b8c
MF		 1406int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1407 unsigned long *size, void *data);
e14ab23d
MF		 1408int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1409 unsigned long *size, void *data);
1410int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1411 unsigned long size, void *data, struct list_head *head);
1412int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1413 unsigned long *size, void *data, bool *set);
1414int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1415 bool block, unsigned long size, void *data);
1416
21b3ddd3 1417int efivar_entry_iter_begin(void);
e14ab23d
MF		 1418void efivar_entry_iter_end(void);
1419
1420int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1421 struct list_head *head, void *data,
1422 struct efivar_entry **prev);
1423int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1424 struct list_head *head, void *data);
1425
1426struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1427 struct list_head *head, bool remove);
1428
8282f5d9
PJ		 1429bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1430 unsigned long data_size);
ed8b0de5
PJ		 1431bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1432 size_t len);
e14ab23d 1433
a9499fa7 1434extern struct work_struct efivar_work;
04851772
MF		 1435void efivar_run_worker(void);
1436
a9499fa7 1437#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
e14ab23d 1438int efivars_sysfs_init(void);
4fc756bd 1439
e0d59733
SA		 1440#define EFIVARS_DATA_SIZE_MAX 1024
1441
4fc756bd 1442#endif /* CONFIG_EFI_VARS */
f0133f3c
MF		 1443extern bool efi_capsule_pending(int *reset_type);
1444
1445extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1446 size_t size, int *reset);
1447
1448extern int efi_capsule_update(efi_capsule_header_t *capsule,
2a457fb3 1449 phys_addr_t *pages);
4fc756bd 1450
926172d4
DY		 1451#ifdef CONFIG_EFI_RUNTIME_MAP
1452int efi_runtime_map_init(struct kobject *);
6a2c20e7
VG		 1453int efi_get_runtime_map_size(void);
1454int efi_get_runtime_map_desc_size(void);
1455int efi_runtime_map_copy(void *buf, size_t bufsz);
926172d4
DY		 1456#else
1457static inline int efi_runtime_map_init(struct kobject *kobj)
1458{
1459 return 0;
1460}
1461
6a2c20e7
VG		 1462static inline int efi_get_runtime_map_size(void)
1463{
1464 return 0;
1465}
1466
1467static inline int efi_get_runtime_map_desc_size(void)
1468{
1469 return 0;
1470}
1471
1472static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1473{
1474 return 0;
1475}
1476
926172d4
DY		 1477#endif
1478
bd669475
AB		 1479/* prototypes shared between arch specific and generic stub code */
1480
8173ec79 1481void efi_printk(char *str);
bd669475 1482
cd33a5c1 1483void efi_free(unsigned long size, unsigned long addr);
bd669475 1484
cd33a5c1 1485char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len);
bd669475 1486
cd33a5c1 1487efi_status_t efi_get_memory_map(struct efi_boot_memmap *map);
bd669475 1488
cd33a5c1 1489efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
220dd769
KS		 1490 unsigned long *addr, unsigned long min);
1491
1492static inline
cd33a5c1 1493efi_status_t efi_low_alloc(unsigned long size, unsigned long align,
220dd769
KS		 1494 unsigned long *addr)
1495{
1496 /*
1497 * Don't allocate at 0x0. It will confuse code that
1498 * checks pointers against NULL. Skip the first 8
1499 * bytes so we start at a nice even number.
1500 */
cd33a5c1 1501 return efi_low_alloc_above(size, align, addr, 0x8);
220dd769 1502}
bd669475 1503
cd33a5c1 1504efi_status_t efi_high_alloc(unsigned long size, unsigned long align,
bd669475
AB		 1505 unsigned long *addr, unsigned long max);
1506
cd33a5c1 1507efi_status_t efi_relocate_kernel(unsigned long *image_addr,
bd669475
AB		 1508 unsigned long image_size,
1509 unsigned long alloc_size,
1510 unsigned long preferred_addr,
220dd769
KS		 1511 unsigned long alignment,
1512 unsigned long min_addr);
bd669475 1513
cd33a5c1 1514efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
bd669475
AB		 1515 char *cmd_line, char *option_string,
1516 unsigned long max_addr,
1517 unsigned long *load_addr,
1518 unsigned long *load_size);
1519
60f38de7 1520efi_status_t efi_parse_options(char const *cmdline);
5a17dae4 1521
cd33a5c1 1522efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,
2c23b73c
AB		 1523 unsigned long size);
1524
0082517f
JHP		 1525#ifdef CONFIG_EFI
1526extern bool efi_runtime_disabled(void);
1527#else
1528static inline bool efi_runtime_disabled(void) { return true; }
1529#endif
1530
80e75596 1531extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
13b210dd 1532extern unsigned long efi_call_virt_save_flags(void);
80e75596 1533
de8cb458
DH		 1534enum efi_secureboot_mode {
1535 efi_secureboot_mode_unset,
1536 efi_secureboot_mode_unknown,
1537 efi_secureboot_mode_disabled,
1538 efi_secureboot_mode_enabled,
1539};
cd33a5c1 1540enum efi_secureboot_mode efi_get_secureboot(void);
de8cb458 1541
ccc829ba 1542#ifdef CONFIG_RESET_ATTACK_MITIGATION
cd33a5c1 1543void efi_enable_reset_attack_mitigation(void);
ccc829ba
MG		 1544#else
1545static inline void
cd33a5c1 1546efi_enable_reset_attack_mitigation(void) { }
ccc829ba
MG		 1547#endif
1548
cd33a5c1 1549efi_status_t efi_random_get_seed(void);
0d959814 1550
cd33a5c1 1551void efi_retrieve_tpm2_eventlog(void);
33b6d034 1552
80e75596
AT		 1553/*
1554 * Arch code can implement the following three template macros, avoiding
1555 * reptition for the void/non-void return cases of {__,}efi_call_virt():
1556 *
1557 * * arch_efi_call_virt_setup()
1558 *
1559 * Sets up the environment for the call (e.g. switching page tables,
1560 * allowing kernel-mode use of floating point, if required).
1561 *
1562 * * arch_efi_call_virt()
1563 *
1564 * Performs the call. The last expression in the macro must be the call
1565 * itself, allowing the logic to be shared by the void and non-void
1566 * cases.
1567 *
1568 * * arch_efi_call_virt_teardown()
1569 *
1570 * Restores the usual kernel environment once the call has returned.
1571 */
1572
1573#define efi_call_virt_pointer(p, f, args...) \
1574({ \
1575 efi_status_t __s; \
1576 unsigned long __flags; \
1577 \
1578 arch_efi_call_virt_setup(); \
1579 \
13b210dd 1580 __flags = efi_call_virt_save_flags(); \
80e75596
AT		 1581 __s = arch_efi_call_virt(p, f, args); \
1582 efi_call_virt_check_flags(__flags, __stringify(f)); \
1583 \
1584 arch_efi_call_virt_teardown(); \
1585 \
1586 __s; \
1587})
1588
1589#define __efi_call_virt_pointer(p, f, args...) \
1590({ \
1591 unsigned long __flags; \
1592 \
1593 arch_efi_call_virt_setup(); \
1594 \
13b210dd 1595 __flags = efi_call_virt_save_flags(); \
80e75596
AT		 1596 arch_efi_call_virt(p, f, args); \
1597 efi_call_virt_check_flags(__flags, __stringify(f)); \
1598 \
1599 arch_efi_call_virt_teardown(); \
1600})
1601
fc07716b 1602typedef efi_status_t (*efi_exit_boot_map_processing)(
fc07716b
JH		 1603 struct efi_boot_memmap *map,
1604 void *priv);
1605
cd33a5c1 1606efi_status_t efi_exit_boot_services(void *handle,
fc07716b
JH		 1607 struct efi_boot_memmap *map,
1608 void *priv,
1609 efi_exit_boot_map_processing priv_func);
63625988 1610
c2ceb5fd
AB		 1611#define EFI_RANDOM_SEED_SIZE 64U
1612
63625988
AB		 1613struct linux_efi_random_seed {
1614 u32 size;
1615 u8 bits[];
1616};
1617
33b6d034
TW		 1618struct linux_efi_tpm_eventlog {
1619 u32 size;
166a2809 1620 u32 final_events_preboot_size;
33b6d034
TW		 1621 u8 version;
1622 u8 log[];
1623};
1624
1625extern int efi_tpm_eventlog_init(void);
1626
c46f3405
MG		 1627struct efi_tcg2_final_events_table {
1628 u64 version;
1629 u64 nr_events;
1630 u8 events[];
1631};
1632extern int efi_tpm_final_log_size;
1633
1c5fecb6
N		 1634extern unsigned long rci2_table_phys;
1635
3425d934
SP		 1636/*
1637 * efi_runtime_service() function identifiers.
1638 * "NONE" is used by efi_recover_from_page_fault() to check if the page
1639 * fault happened while executing an efi runtime service.
1640 */
9dbbedaa 1641enum efi_rts_ids {
5c418dc7
AR		 1642 EFI_NONE,
1643 EFI_GET_TIME,
1644 EFI_SET_TIME,
1645 EFI_GET_WAKEUP_TIME,
1646 EFI_SET_WAKEUP_TIME,
1647 EFI_GET_VARIABLE,
1648 EFI_GET_NEXT_VARIABLE,
1649 EFI_SET_VARIABLE,
1650 EFI_QUERY_VARIABLE_INFO,
1651 EFI_GET_NEXT_HIGH_MONO_COUNT,
1652 EFI_RESET_SYSTEM,
1653 EFI_UPDATE_CAPSULE,
1654 EFI_QUERY_CAPSULE_CAPS,
9dbbedaa
SP		 1655};
1656
1657/*
1658 * efi_runtime_work: Details of EFI Runtime Service work
1659 * @arg<1-5>: EFI Runtime Service function arguments
1660 * @status: Status of executing EFI Runtime Service
1661 * @efi_rts_id: EFI Runtime Service function identifier
1662 * @efi_rts_comp: Struct used for handling completions
1663 */
1664struct efi_runtime_work {
1665 void *arg1;
1666 void *arg2;
1667 void *arg3;
1668 void *arg4;
1669 void *arg5;
1670 efi_status_t status;
1671 struct work_struct work;
1672 enum efi_rts_ids efi_rts_id;
1673 struct completion efi_rts_comp;
1674};
1675
1676extern struct efi_runtime_work efi_rts_work;
1677
3eb420e7
SP		 1678/* Workqueue to queue EFI Runtime Services */
1679extern struct workqueue_struct *efi_rts_wq;
1680
71e0940d 1681struct linux_efi_memreserve {
5f0b0ecf
AB		 1682 int size; // allocated size of the array
1683 atomic_t count; // number of entries used
1684 phys_addr_t next; // pa of next struct instance
1685 struct {
1686 phys_addr_t base;
1687 phys_addr_t size;
1688 } entry[0];
71e0940d
AB		 1689};
1690
5f0b0ecf
AB		 1691#define EFI_MEMRESERVE_SIZE(count) (sizeof(struct linux_efi_memreserve) + \
1692 (count) * sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1693
80424b02
AB		 1694#define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1695 / sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1696
4444f854
MG		 1697void efi_pci_disable_bridge_busmaster(void);
1698
1da177e4 1699#endif /* _LINUX_EFI_H */
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