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
51/*
52 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as
53 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
54 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM),
55 * this means that firmware services invoked by the kernel may assume that
56 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that
57 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits.
58 *
59 * Note that the UEFI spec as well as some comments in the EDK2 code base
60 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be
61 * a mistake, given that no code seems to exist that actually enforces that
62 * or relies on it.
63 */
64typedef guid_t efi_guid_t __aligned(__alignof__(u32));
65
66#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
67 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
68
69/*
70 * Generic EFI table header
71 */
72typedef struct {
73 u64 signature;
74 u32 revision;
75 u32 headersize;
76 u32 crc32;
77 u32 reserved;
78} efi_table_hdr_t;
79
80/*
81 * Memory map descriptor:
82 */
83
84/* Memory types: */
85#define EFI_RESERVED_TYPE 0
86#define EFI_LOADER_CODE 1
87#define EFI_LOADER_DATA 2
88#define EFI_BOOT_SERVICES_CODE 3
89#define EFI_BOOT_SERVICES_DATA 4
90#define EFI_RUNTIME_SERVICES_CODE 5
91#define EFI_RUNTIME_SERVICES_DATA 6
92#define EFI_CONVENTIONAL_MEMORY 7
93#define EFI_UNUSABLE_MEMORY 8
94#define EFI_ACPI_RECLAIM_MEMORY 9
95#define EFI_ACPI_MEMORY_NVS 10
96#define EFI_MEMORY_MAPPED_IO 11
97#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
98#define EFI_PAL_CODE 13
99#define EFI_PERSISTENT_MEMORY 14
100#define EFI_MAX_MEMORY_TYPE 15
101
102/* Attribute values: */
103#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
104#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
105#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
106#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
107#define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
108#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
109#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
110#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
111#define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
112#define EFI_MEMORY_MORE_RELIABLE \
113 ((u64)0x0000000000010000ULL) /* higher reliability */
114#define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
115#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
116#define EFI_MEMORY_DESCRIPTOR_VERSION 1
117
118#define EFI_PAGE_SHIFT 12
119#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
120#define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
121
122typedef struct {
123 u32 type;
124 u32 pad;
125 u64 phys_addr;
126 u64 virt_addr;
127 u64 num_pages;
128 u64 attribute;
129} efi_memory_desc_t;
130
131typedef struct {
132 efi_guid_t guid;
133 u32 headersize;
134 u32 flags;
135 u32 imagesize;
136} efi_capsule_header_t;
137
138struct efi_boot_memmap {
139 efi_memory_desc_t **map;
140 unsigned long *map_size;
141 unsigned long *desc_size;
142 u32 *desc_ver;
143 unsigned long *key_ptr;
144 unsigned long *buff_size;
145};
146
147/*
148 * EFI capsule flags
149 */
150#define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
151#define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
152#define EFI_CAPSULE_INITIATE_RESET 0x00040000
153
154struct capsule_info {
155 efi_capsule_header_t header;
156 efi_capsule_header_t *capsule;
157 int reset_type;
158 long index;
159 size_t count;
160 size_t total_size;
161 struct page **pages;
162 phys_addr_t *phys;
163 size_t page_bytes_remain;
164};
165
166int __efi_capsule_setup_info(struct capsule_info *cap_info);
167
168/*
169 * Allocation types for calls to boottime->allocate_pages.
170 */
171#define EFI_ALLOCATE_ANY_PAGES 0
172#define EFI_ALLOCATE_MAX_ADDRESS 1
173#define EFI_ALLOCATE_ADDRESS 2
174#define EFI_MAX_ALLOCATE_TYPE 3
175
176typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
177
178/*
179 * Types and defines for Time Services
180 */
181#define EFI_TIME_ADJUST_DAYLIGHT 0x1
182#define EFI_TIME_IN_DAYLIGHT 0x2
183#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
184
185typedef struct {
186 u16 year;
187 u8 month;
188 u8 day;
189 u8 hour;
190 u8 minute;
191 u8 second;
192 u8 pad1;
193 u32 nanosecond;
194 s16 timezone;
195 u8 daylight;
196 u8 pad2;
197} efi_time_t;
198
199typedef struct {
200 u32 resolution;
201 u32 accuracy;
202 u8 sets_to_zero;
203} efi_time_cap_t;
204
205typedef struct {
206 efi_table_hdr_t hdr;
207 u32 raise_tpl;
208 u32 restore_tpl;
209 u32 allocate_pages;
210 u32 free_pages;
211 u32 get_memory_map;
212 u32 allocate_pool;
213 u32 free_pool;
214 u32 create_event;
215 u32 set_timer;
216 u32 wait_for_event;
217 u32 signal_event;
218 u32 close_event;
219 u32 check_event;
220 u32 install_protocol_interface;
221 u32 reinstall_protocol_interface;
222 u32 uninstall_protocol_interface;
223 u32 handle_protocol;
224 u32 __reserved;
225 u32 register_protocol_notify;
226 u32 locate_handle;
227 u32 locate_device_path;
228 u32 install_configuration_table;
229 u32 load_image;
230 u32 start_image;
231 u32 exit;
232 u32 unload_image;
233 u32 exit_boot_services;
234 u32 get_next_monotonic_count;
235 u32 stall;
236 u32 set_watchdog_timer;
237 u32 connect_controller;
238 u32 disconnect_controller;
239 u32 open_protocol;
240 u32 close_protocol;
241 u32 open_protocol_information;
242 u32 protocols_per_handle;
243 u32 locate_handle_buffer;
244 u32 locate_protocol;
245 u32 install_multiple_protocol_interfaces;
246 u32 uninstall_multiple_protocol_interfaces;
247 u32 calculate_crc32;
248 u32 copy_mem;
249 u32 set_mem;
250 u32 create_event_ex;
251} __packed efi_boot_services_32_t;
252
253typedef struct {
254 efi_table_hdr_t hdr;
255 u64 raise_tpl;
256 u64 restore_tpl;
257 u64 allocate_pages;
258 u64 free_pages;
259 u64 get_memory_map;
260 u64 allocate_pool;
261 u64 free_pool;
262 u64 create_event;
263 u64 set_timer;
264 u64 wait_for_event;
265 u64 signal_event;
266 u64 close_event;
267 u64 check_event;
268 u64 install_protocol_interface;
269 u64 reinstall_protocol_interface;
270 u64 uninstall_protocol_interface;
271 u64 handle_protocol;
272 u64 __reserved;
273 u64 register_protocol_notify;
274 u64 locate_handle;
275 u64 locate_device_path;
276 u64 install_configuration_table;
277 u64 load_image;
278 u64 start_image;
279 u64 exit;
280 u64 unload_image;
281 u64 exit_boot_services;
282 u64 get_next_monotonic_count;
283 u64 stall;
284 u64 set_watchdog_timer;
285 u64 connect_controller;
286 u64 disconnect_controller;
287 u64 open_protocol;
288 u64 close_protocol;
289 u64 open_protocol_information;
290 u64 protocols_per_handle;
291 u64 locate_handle_buffer;
292 u64 locate_protocol;
293 u64 install_multiple_protocol_interfaces;
294 u64 uninstall_multiple_protocol_interfaces;
295 u64 calculate_crc32;
296 u64 copy_mem;
297 u64 set_mem;
298 u64 create_event_ex;
299} __packed efi_boot_services_64_t;
300
301/*
302 * EFI Boot Services table
303 */
304typedef struct {
305 efi_table_hdr_t hdr;
306 void *raise_tpl;
307 void *restore_tpl;
308 efi_status_t (*allocate_pages)(int, int, unsigned long,
309 efi_physical_addr_t *);
310 efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
311 efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
312 unsigned long *, u32 *);
313 efi_status_t (*allocate_pool)(int, unsigned long, void **);
314 efi_status_t (*free_pool)(void *);
315 void *create_event;
316 void *set_timer;
317 void *wait_for_event;
318 void *signal_event;
319 void *close_event;
320 void *check_event;
321 void *install_protocol_interface;
322 void *reinstall_protocol_interface;
323 void *uninstall_protocol_interface;
324 efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
325 void *__reserved;
326 void *register_protocol_notify;
327 efi_status_t (*locate_handle)(int, efi_guid_t *, void *,
328 unsigned long *, efi_handle_t *);
329 void *locate_device_path;
330 efi_status_t (*install_configuration_table)(efi_guid_t *, void *);
331 void *load_image;
332 void *start_image;
333 void *exit;
334 void *unload_image;
335 efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
336 void *get_next_monotonic_count;
337 void *stall;
338 void *set_watchdog_timer;
339 void *connect_controller;
340 void *disconnect_controller;
341 void *open_protocol;
342 void *close_protocol;
343 void *open_protocol_information;
344 void *protocols_per_handle;
345 void *locate_handle_buffer;
346 efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
347 void *install_multiple_protocol_interfaces;
348 void *uninstall_multiple_protocol_interfaces;
349 void *calculate_crc32;
350 void *copy_mem;
351 void *set_mem;
352 void *create_event_ex;
353} efi_boot_services_t;
354
355typedef enum {
356 EfiPciIoWidthUint8,
357 EfiPciIoWidthUint16,
358 EfiPciIoWidthUint32,
359 EfiPciIoWidthUint64,
360 EfiPciIoWidthFifoUint8,
361 EfiPciIoWidthFifoUint16,
362 EfiPciIoWidthFifoUint32,
363 EfiPciIoWidthFifoUint64,
364 EfiPciIoWidthFillUint8,
365 EfiPciIoWidthFillUint16,
366 EfiPciIoWidthFillUint32,
367 EfiPciIoWidthFillUint64,
368 EfiPciIoWidthMaximum
369} EFI_PCI_IO_PROTOCOL_WIDTH;
370
371typedef enum {
372 EfiPciIoAttributeOperationGet,
373 EfiPciIoAttributeOperationSet,
374 EfiPciIoAttributeOperationEnable,
375 EfiPciIoAttributeOperationDisable,
376 EfiPciIoAttributeOperationSupported,
377 EfiPciIoAttributeOperationMaximum
378} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
379
380typedef struct {
381 u32 read;
382 u32 write;
383} efi_pci_io_protocol_access_32_t;
384
385typedef struct {
386 u64 read;
387 u64 write;
388} efi_pci_io_protocol_access_64_t;
389
390typedef struct {
391 void *read;
392 void *write;
393} efi_pci_io_protocol_access_t;
394
395typedef struct {
396 u32 poll_mem;
397 u32 poll_io;
398 efi_pci_io_protocol_access_32_t mem;
399 efi_pci_io_protocol_access_32_t io;
400 efi_pci_io_protocol_access_32_t pci;
401 u32 copy_mem;
402 u32 map;
403 u32 unmap;
404 u32 allocate_buffer;
405 u32 free_buffer;
406 u32 flush;
407 u32 get_location;
408 u32 attributes;
409 u32 get_bar_attributes;
410 u32 set_bar_attributes;
411 u64 romsize;
412 u32 romimage;
413} efi_pci_io_protocol_32_t;
414
415typedef struct {
416 u64 poll_mem;
417 u64 poll_io;
418 efi_pci_io_protocol_access_64_t mem;
419 efi_pci_io_protocol_access_64_t io;
420 efi_pci_io_protocol_access_64_t pci;
421 u64 copy_mem;
422 u64 map;
423 u64 unmap;
424 u64 allocate_buffer;
425 u64 free_buffer;
426 u64 flush;
427 u64 get_location;
428 u64 attributes;
429 u64 get_bar_attributes;
430 u64 set_bar_attributes;
431 u64 romsize;
432 u64 romimage;
433} efi_pci_io_protocol_64_t;
434
435typedef struct {
436 void *poll_mem;
437 void *poll_io;
438 efi_pci_io_protocol_access_t mem;
439 efi_pci_io_protocol_access_t io;
440 efi_pci_io_protocol_access_t pci;
441 void *copy_mem;
442 void *map;
443 void *unmap;
444 void *allocate_buffer;
445 void *free_buffer;
446 void *flush;
447 void *get_location;
448 void *attributes;
449 void *get_bar_attributes;
450 void *set_bar_attributes;
451 uint64_t romsize;
452 void *romimage;
453} efi_pci_io_protocol_t;
454
455#define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
456#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
457#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
458#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
459#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
460#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
461#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
462#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
463#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
464#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
465#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
466#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
467#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
468#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
469#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
470#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
471#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
472#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
473#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
474
475typedef struct {
476 u32 version;
477 u32 get;
478 u32 set;
479 u32 del;
480 u32 get_all;
481} apple_properties_protocol_32_t;
482
483typedef struct {
484 u64 version;
485 u64 get;
486 u64 set;
487 u64 del;
488 u64 get_all;
489} apple_properties_protocol_64_t;
490
491typedef struct {
492 u32 get_capability;
493 u32 get_event_log;
494 u32 hash_log_extend_event;
495 u32 submit_command;
496 u32 get_active_pcr_banks;
497 u32 set_active_pcr_banks;
498 u32 get_result_of_set_active_pcr_banks;
499} efi_tcg2_protocol_32_t;
500
501typedef struct {
502 u64 get_capability;
503 u64 get_event_log;
504 u64 hash_log_extend_event;
505 u64 submit_command;
506 u64 get_active_pcr_banks;
507 u64 set_active_pcr_banks;
508 u64 get_result_of_set_active_pcr_banks;
509} efi_tcg2_protocol_64_t;
510
511typedef u32 efi_tcg2_event_log_format;
512
513typedef struct {
514 void *get_capability;
515 efi_status_t (*get_event_log)(efi_handle_t, efi_tcg2_event_log_format,
516 efi_physical_addr_t *, efi_physical_addr_t *, efi_bool_t *);
517 void *hash_log_extend_event;
518 void *submit_command;
519 void *get_active_pcr_banks;
520 void *set_active_pcr_banks;
521 void *get_result_of_set_active_pcr_banks;
522} efi_tcg2_protocol_t;
523
524/*
525 * Types and defines for EFI ResetSystem
526 */
527#define EFI_RESET_COLD 0
528#define EFI_RESET_WARM 1
529#define EFI_RESET_SHUTDOWN 2
530
531/*
532 * EFI Runtime Services table
533 */
534#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
535#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
536
537typedef struct {
538 efi_table_hdr_t hdr;
539 u32 get_time;
540 u32 set_time;
541 u32 get_wakeup_time;
542 u32 set_wakeup_time;
543 u32 set_virtual_address_map;
544 u32 convert_pointer;
545 u32 get_variable;
546 u32 get_next_variable;
547 u32 set_variable;
548 u32 get_next_high_mono_count;
549 u32 reset_system;
550 u32 update_capsule;
551 u32 query_capsule_caps;
552 u32 query_variable_info;
553} efi_runtime_services_32_t;
554
555typedef struct {
556 efi_table_hdr_t hdr;
557 u64 get_time;
558 u64 set_time;
559 u64 get_wakeup_time;
560 u64 set_wakeup_time;
561 u64 set_virtual_address_map;
562 u64 convert_pointer;
563 u64 get_variable;
564 u64 get_next_variable;
565 u64 set_variable;
566 u64 get_next_high_mono_count;
567 u64 reset_system;
568 u64 update_capsule;
569 u64 query_capsule_caps;
570 u64 query_variable_info;
571} efi_runtime_services_64_t;
572
573typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
574typedef efi_status_t efi_set_time_t (efi_time_t *tm);
575typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
576 efi_time_t *tm);
577typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
578typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
579 unsigned long *data_size, void *data);
580typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
581 efi_guid_t *vendor);
582typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
583 u32 attr, unsigned long data_size,
584 void *data);
585typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
586typedef void efi_reset_system_t (int reset_type, efi_status_t status,
587 unsigned long data_size, efi_char16_t *data);
588typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
589 unsigned long descriptor_size,
590 u32 descriptor_version,
591 efi_memory_desc_t *virtual_map);
592typedef efi_status_t efi_query_variable_info_t(u32 attr,
593 u64 *storage_space,
594 u64 *remaining_space,
595 u64 *max_variable_size);
596typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
597 unsigned long count,
598 unsigned long sg_list);
599typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
600 unsigned long count,
601 u64 *max_size,
602 int *reset_type);
603typedef efi_status_t efi_query_variable_store_t(u32 attributes,
604 unsigned long size,
605 bool nonblocking);
606
607typedef struct {
608 efi_table_hdr_t hdr;
609 efi_get_time_t *get_time;
610 efi_set_time_t *set_time;
611 efi_get_wakeup_time_t *get_wakeup_time;
612 efi_set_wakeup_time_t *set_wakeup_time;
613 efi_set_virtual_address_map_t *set_virtual_address_map;
614 void *convert_pointer;
615 efi_get_variable_t *get_variable;
616 efi_get_next_variable_t *get_next_variable;
617 efi_set_variable_t *set_variable;
618 efi_get_next_high_mono_count_t *get_next_high_mono_count;
619 efi_reset_system_t *reset_system;
620 efi_update_capsule_t *update_capsule;
621 efi_query_capsule_caps_t *query_capsule_caps;
622 efi_query_variable_info_t *query_variable_info;
623} efi_runtime_services_t;
624
625void efi_native_runtime_setup(void);
626
627/*
628 * EFI Configuration Table and GUID definitions
629 *
630 * These are all defined in a single line to make them easier to
631 * grep for and to see them at a glance - while still having a
632 * similar structure to the definitions in the spec.
633 *
634 * Here's how they are structured:
635 *
636 * GUID: 12345678-1234-1234-1234-123456789012
637 * Spec:
638 * #define EFI_SOME_PROTOCOL_GUID \
639 * {0x12345678,0x1234,0x1234,\
640 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
641 * Here:
642 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
643 * ^ tabs ^extra space
644 *
645 * Note that the 'extra space' separates the values at the same place
646 * where the UEFI SPEC breaks the line.
647 */
648#define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
649#define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
650#define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
651#define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
652#define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
653#define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
654#define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
655#define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
656#define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
657#define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
658#define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
659#define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
660#define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
661#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
662#define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
663#define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
664#define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
665#define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
666#define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
667#define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
668#define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
669#define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
670#define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
671#define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
672#define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
673#define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
674#define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
675
676#define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
677#define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
678
679#define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
680#define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
681#define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
682
683/*
684 * This GUID is used to pass to the kernel proper the struct screen_info
685 * structure that was populated by the stub based on the GOP protocol instance
686 * associated with ConOut
687 */
688#define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
689#define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
690#define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
691#define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
692#define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
693
694typedef struct {
695 efi_guid_t guid;
696 u64 table;
697} efi_config_table_64_t;
698
699typedef struct {
700 efi_guid_t guid;
701 u32 table;
702} efi_config_table_32_t;
703
704typedef struct {
705 efi_guid_t guid;
706 unsigned long table;
707} efi_config_table_t;
708
709typedef struct {
710 efi_guid_t guid;
711 const char *name;
712 unsigned long *ptr;
713} efi_config_table_type_t;
714
715#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
716
717#define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
718#define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
719#define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
720#define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
721#define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
722#define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
723
724typedef struct {
725 efi_table_hdr_t hdr;
726 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
727 u32 fw_revision;
728 u32 __pad1;
729 u64 con_in_handle;
730 u64 con_in;
731 u64 con_out_handle;
732 u64 con_out;
733 u64 stderr_handle;
734 u64 stderr;
735 u64 runtime;
736 u64 boottime;
737 u32 nr_tables;
738 u32 __pad2;
739 u64 tables;
740} efi_system_table_64_t;
741
742typedef struct {
743 efi_table_hdr_t hdr;
744 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
745 u32 fw_revision;
746 u32 con_in_handle;
747 u32 con_in;
748 u32 con_out_handle;
749 u32 con_out;
750 u32 stderr_handle;
751 u32 stderr;
752 u32 runtime;
753 u32 boottime;
754 u32 nr_tables;
755 u32 tables;
756} efi_system_table_32_t;
757
758typedef struct {
759 efi_table_hdr_t hdr;
760 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
761 u32 fw_revision;
762 unsigned long con_in_handle;
763 unsigned long con_in;
764 unsigned long con_out_handle;
765 unsigned long con_out;
766 unsigned long stderr_handle;
767 unsigned long stderr;
768 efi_runtime_services_t *runtime;
769 efi_boot_services_t *boottime;
770 unsigned long nr_tables;
771 unsigned long tables;
772} efi_system_table_t;
773
774/*
775 * Architecture independent structure for describing a memory map for the
776 * benefit of efi_memmap_init_early(), saving us the need to pass four
777 * parameters.
778 */
779struct efi_memory_map_data {
780 phys_addr_t phys_map;
781 unsigned long size;
782 unsigned long desc_version;
783 unsigned long desc_size;
784};
785
786struct efi_memory_map {
787 phys_addr_t phys_map;
788 void *map;
789 void *map_end;
790 int nr_map;
791 unsigned long desc_version;
792 unsigned long desc_size;
793 bool late;
794};
795
796struct efi_mem_range {
797 struct range range;
798 u64 attribute;
799};
800
801struct efi_fdt_params {
802 u64 system_table;
803 u64 mmap;
804 u32 mmap_size;
805 u32 desc_size;
806 u32 desc_ver;
807};
808
809typedef struct {
810 u32 revision;
811 u32 parent_handle;
812 u32 system_table;
813 u32 device_handle;
814 u32 file_path;
815 u32 reserved;
816 u32 load_options_size;
817 u32 load_options;
818 u32 image_base;
819 __aligned_u64 image_size;
820 unsigned int image_code_type;
821 unsigned int image_data_type;
822 unsigned long unload;
823} efi_loaded_image_32_t;
824
825typedef struct {
826 u32 revision;
827 u64 parent_handle;
828 u64 system_table;
829 u64 device_handle;
830 u64 file_path;
831 u64 reserved;
832 u32 load_options_size;
833 u64 load_options;
834 u64 image_base;
835 __aligned_u64 image_size;
836 unsigned int image_code_type;
837 unsigned int image_data_type;
838 unsigned long unload;
839} efi_loaded_image_64_t;
840
841typedef struct {
842 u32 revision;
843 void *parent_handle;
844 efi_system_table_t *system_table;
845 void *device_handle;
846 void *file_path;
847 void *reserved;
848 u32 load_options_size;
849 void *load_options;
850 void *image_base;
851 __aligned_u64 image_size;
852 unsigned int image_code_type;
853 unsigned int image_data_type;
854 unsigned long unload;
855} efi_loaded_image_t;
856
857
858typedef struct {
859 u64 size;
860 u64 file_size;
861 u64 phys_size;
862 efi_time_t create_time;
863 efi_time_t last_access_time;
864 efi_time_t modification_time;
865 __aligned_u64 attribute;
866 efi_char16_t filename[1];
867} efi_file_info_t;
868
869typedef struct {
870 u64 revision;
871 u32 open;
872 u32 close;
873 u32 delete;
874 u32 read;
875 u32 write;
876 u32 get_position;
877 u32 set_position;
878 u32 get_info;
879 u32 set_info;
880 u32 flush;
881} efi_file_handle_32_t;
882
883typedef struct {
884 u64 revision;
885 u64 open;
886 u64 close;
887 u64 delete;
888 u64 read;
889 u64 write;
890 u64 get_position;
891 u64 set_position;
892 u64 get_info;
893 u64 set_info;
894 u64 flush;
895} efi_file_handle_64_t;
896
897typedef struct _efi_file_handle {
898 u64 revision;
899 efi_status_t (*open)(struct _efi_file_handle *,
900 struct _efi_file_handle **,
901 efi_char16_t *, u64, u64);
902 efi_status_t (*close)(struct _efi_file_handle *);
903 void *delete;
904 efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
905 void *);
906 void *write;
907 void *get_position;
908 void *set_position;
909 efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
910 unsigned long *, void *);
911 void *set_info;
912 void *flush;
913} efi_file_handle_t;
914
915typedef struct {
916 u64 revision;
917 u32 open_volume;
918} efi_file_io_interface_32_t;
919
920typedef struct {
921 u64 revision;
922 u64 open_volume;
923} efi_file_io_interface_64_t;
924
925typedef struct _efi_file_io_interface {
926 u64 revision;
927 int (*open_volume)(struct _efi_file_io_interface *,
928 efi_file_handle_t **);
929} efi_file_io_interface_t;
930
931#define EFI_FILE_MODE_READ 0x0000000000000001
932#define EFI_FILE_MODE_WRITE 0x0000000000000002
933#define EFI_FILE_MODE_CREATE 0x8000000000000000
934
935typedef struct {
936 u32 version;
937 u32 length;
938 u64 memory_protection_attribute;
939} efi_properties_table_t;
940
941#define EFI_PROPERTIES_TABLE_VERSION 0x00010000
942#define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
943
944#define EFI_INVALID_TABLE_ADDR (~0UL)
945
946typedef struct {
947 u32 version;
948 u32 num_entries;
949 u32 desc_size;
950 u32 reserved;
951 efi_memory_desc_t entry[0];
952} efi_memory_attributes_table_t;
953
954typedef struct {
955 efi_guid_t signature_owner;
956 u8 signature_data[];
957} efi_signature_data_t;
958
959typedef struct {
960 efi_guid_t signature_type;
961 u32 signature_list_size;
962 u32 signature_header_size;
963 u32 signature_size;
964 u8 signature_header[];
965 /* efi_signature_data_t signatures[][] */
966} efi_signature_list_t;
967
968typedef u8 efi_sha256_hash_t[32];
969
970typedef struct {
971 efi_sha256_hash_t to_be_signed_hash;
972 efi_time_t time_of_revocation;
973} efi_cert_x509_sha256_t;
974
975/*
976 * All runtime access to EFI goes through this structure:
977 */
978extern struct efi {
979 efi_system_table_t *systab; /* EFI system table */
980 unsigned int runtime_version; /* Runtime services version */
981 unsigned long mps; /* MPS table */
982 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
983 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
984 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
985 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
986 unsigned long sal_systab; /* SAL system table */
987 unsigned long boot_info; /* boot info table */
988 unsigned long hcdp; /* HCDP table */
989 unsigned long uga; /* UGA table */
990 unsigned long uv_systab; /* UV system table */
991 unsigned long fw_vendor; /* fw_vendor */
992 unsigned long runtime; /* runtime table */
993 unsigned long config_table; /* config tables */
994 unsigned long esrt; /* ESRT table */
995 unsigned long properties_table; /* properties table */
996 unsigned long mem_attr_table; /* memory attributes table */
997 unsigned long rng_seed; /* UEFI firmware random seed */
998 unsigned long tpm_log; /* TPM2 Event Log table */
999 unsigned long mem_reserve; /* Linux EFI memreserve table */
1000 efi_get_time_t *get_time;
1001 efi_set_time_t *set_time;
1002 efi_get_wakeup_time_t *get_wakeup_time;
1003 efi_set_wakeup_time_t *set_wakeup_time;
1004 efi_get_variable_t *get_variable;
1005 efi_get_next_variable_t *get_next_variable;
1006 efi_set_variable_t *set_variable;
1007 efi_set_variable_t *set_variable_nonblocking;
1008 efi_query_variable_info_t *query_variable_info;
1009 efi_query_variable_info_t *query_variable_info_nonblocking;
1010 efi_update_capsule_t *update_capsule;
1011 efi_query_capsule_caps_t *query_capsule_caps;
1012 efi_get_next_high_mono_count_t *get_next_high_mono_count;
1013 efi_reset_system_t *reset_system;
1014 efi_set_virtual_address_map_t *set_virtual_address_map;
1015 struct efi_memory_map memmap;
1016 unsigned long flags;
1017} efi;
1018
1019extern struct mm_struct efi_mm;
1020
1021static inline int
1022efi_guidcmp (efi_guid_t left, efi_guid_t right)
1023{
1024 return memcmp(&left, &right, sizeof (efi_guid_t));
1025}
1026
1027static inline char *
1028efi_guid_to_str(efi_guid_t *guid, char *out)
1029{
1030 sprintf(out, "%pUl", guid->b);
1031 return out;
1032}
1033
1034extern void efi_init (void);
1035extern void *efi_get_pal_addr (void);
1036extern void efi_map_pal_code (void);
1037extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
1038extern void efi_gettimeofday (struct timespec64 *ts);
1039extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
1040#ifdef CONFIG_X86
1041extern efi_status_t efi_query_variable_store(u32 attributes,
1042 unsigned long size,
1043 bool nonblocking);
1044extern void efi_find_mirror(void);
1045#else
1046
1047static inline efi_status_t efi_query_variable_store(u32 attributes,
1048 unsigned long size,
1049 bool nonblocking)
1050{
1051 return EFI_SUCCESS;
1052}
1053#endif
1054extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
1055
1056extern phys_addr_t __init efi_memmap_alloc(unsigned int num_entries);
1057extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
1058extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
1059extern void __init efi_memmap_unmap(void);
1060extern int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map);
1061extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
1062 struct range *range);
1063extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
1064 void *buf, struct efi_mem_range *mem);
1065
1066extern int efi_config_init(efi_config_table_type_t *arch_tables);
1067#ifdef CONFIG_EFI_ESRT
1068extern void __init efi_esrt_init(void);
1069#else
1070static inline void efi_esrt_init(void) { }
1071#endif
1072extern int efi_config_parse_tables(void *config_tables, int count, int sz,
1073 efi_config_table_type_t *arch_tables);
1074extern u64 efi_get_iobase (void);
1075extern int efi_mem_type(unsigned long phys_addr);
1076extern u64 efi_mem_attributes (unsigned long phys_addr);
1077extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
1078extern int __init efi_uart_console_only (void);
1079extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
1080extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
1081extern void efi_mem_reserve(phys_addr_t addr, u64 size);
1082extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
1083extern void efi_initialize_iomem_resources(struct resource *code_resource,
1084 struct resource *data_resource, struct resource *bss_resource);
1085extern int efi_get_fdt_params(struct efi_fdt_params *params);
1086extern struct kobject *efi_kobj;
1087
1088extern int efi_reboot_quirk_mode;
1089extern bool efi_poweroff_required(void);
1090
1091#ifdef CONFIG_EFI_FAKE_MEMMAP
1092extern void __init efi_fake_memmap(void);
1093#else
1094static inline void efi_fake_memmap(void) { }
1095#endif
1096
1097/*
1098 * efi_memattr_perm_setter - arch specific callback function passed into
1099 * efi_memattr_apply_permissions() that updates the
1100 * mapping permissions described by the second
1101 * argument in the page tables referred to by the
1102 * first argument.
1103 */
1104typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
1105
1106extern int efi_memattr_init(void);
1107extern int efi_memattr_apply_permissions(struct mm_struct *mm,
1108 efi_memattr_perm_setter fn);
1109
1110/*
1111 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
1112 * @map: the start of efi memmap
1113 * @desc_size: the size of space for each EFI memmap descriptor
1114 * @n: the index of efi memmap descriptor
1115 *
1116 * EFI boot service provides the GetMemoryMap() function to get a copy of the
1117 * current memory map which is an array of memory descriptors, each of
1118 * which describes a contiguous block of memory. It also gets the size of the
1119 * map, and the size of each descriptor, etc.
1120 *
1121 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
1122 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
1123 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
1124 * MUST use the returned size of the descriptor to find the start of each
1125 * efi_memory_memdesc_t in the memory map array. This should only be used
1126 * during bootup since for_each_efi_memory_desc_xxx() is available after the
1127 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
1128 */
1129#define efi_early_memdesc_ptr(map, desc_size, n) \
1130 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
1131
1132/* Iterate through an efi_memory_map */
1133#define for_each_efi_memory_desc_in_map(m, md) \
1134 for ((md) = (m)->map; \
1135 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
1136 (md) = (void *)(md) + (m)->desc_size)
1137
1138/**
1139 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1140 * @md: the efi_memory_desc_t * iterator
1141 *
1142 * Once the loop finishes @md must not be accessed.
1143 */
1144#define for_each_efi_memory_desc(md) \
1145 for_each_efi_memory_desc_in_map(&efi.memmap, md)
1146
1147/*
1148 * Format an EFI memory descriptor's type and attributes to a user-provided
1149 * character buffer, as per snprintf(), and return the buffer.
1150 */
1151char * __init efi_md_typeattr_format(char *buf, size_t size,
1152 const efi_memory_desc_t *md);
1153
1154
1155typedef void (*efi_element_handler_t)(const char *source,
1156 const void *element_data,
1157 size_t element_size);
1158extern int __init parse_efi_signature_list(
1159 const char *source,
1160 const void *data, size_t size,
1161 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
1162
1163/**
1164 * efi_range_is_wc - check the WC bit on an address range
1165 * @start: starting kvirt address
1166 * @len: length of range
1167 *
1168 * Consult the EFI memory map and make sure it's ok to set this range WC.
1169 * Returns true or false.
1170 */
1171static inline int efi_range_is_wc(unsigned long start, unsigned long len)
1172{
1173 unsigned long i;
1174
1175 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
1176 unsigned long paddr = __pa(start + i);
1177 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
1178 return 0;
1179 }
1180 /* The range checked out */
1181 return 1;
1182}
1183
1184#ifdef CONFIG_EFI_PCDP
1185extern int __init efi_setup_pcdp_console(char *);
1186#endif
1187
1188/*
1189 * We play games with efi_enabled so that the compiler will, if
1190 * possible, remove EFI-related code altogether.
1191 */
1192#define EFI_BOOT 0 /* Were we booted from EFI? */
1193#define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
1194#define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
1195#define EFI_MEMMAP 4 /* Can we use EFI memory map? */
1196#define EFI_64BIT 5 /* Is the firmware 64-bit? */
1197#define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
1198#define EFI_ARCH_1 7 /* First arch-specific bit */
1199#define EFI_DBG 8 /* Print additional debug info at runtime */
1200#define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
1201#define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
1202
1203#ifdef CONFIG_EFI
1204/*
1205 * Test whether the above EFI_* bits are enabled.
1206 */
1207static inline bool efi_enabled(int feature)
1208{
1209 return test_bit(feature, &efi.flags) != 0;
1210}
1211extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1212
1213extern bool efi_is_table_address(unsigned long phys_addr);
1214#else
1215static inline bool efi_enabled(int feature)
1216{
1217 return false;
1218}
1219static inline void
1220efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1221
1222static inline bool
1223efi_capsule_pending(int *reset_type)
1224{
1225 return false;
1226}
1227
1228static inline bool efi_is_table_address(unsigned long phys_addr)
1229{
1230 return false;
1231}
1232#endif
1233
1234extern int efi_status_to_err(efi_status_t status);
1235
1236/*
1237 * Variable Attributes
1238 */
1239#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
1240#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1241#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
1242#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1243#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1244#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1245#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
1246
1247#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
1248 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1249 EFI_VARIABLE_RUNTIME_ACCESS | \
1250 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1251 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1252 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1253 EFI_VARIABLE_APPEND_WRITE)
1254/*
1255 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1256 * not including trailing NUL
1257 */
1258#define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
1259
1260/*
1261 * The type of search to perform when calling boottime->locate_handle
1262 */
1263#define EFI_LOCATE_ALL_HANDLES 0
1264#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
1265#define EFI_LOCATE_BY_PROTOCOL 2
1266
1267/*
1268 * EFI Device Path information
1269 */
1270#define EFI_DEV_HW 0x01
1271#define EFI_DEV_PCI 1
1272#define EFI_DEV_PCCARD 2
1273#define EFI_DEV_MEM_MAPPED 3
1274#define EFI_DEV_VENDOR 4
1275#define EFI_DEV_CONTROLLER 5
1276#define EFI_DEV_ACPI 0x02
1277#define EFI_DEV_BASIC_ACPI 1
1278#define EFI_DEV_EXPANDED_ACPI 2
1279#define EFI_DEV_MSG 0x03
1280#define EFI_DEV_MSG_ATAPI 1
1281#define EFI_DEV_MSG_SCSI 2
1282#define EFI_DEV_MSG_FC 3
1283#define EFI_DEV_MSG_1394 4
1284#define EFI_DEV_MSG_USB 5
1285#define EFI_DEV_MSG_USB_CLASS 15
1286#define EFI_DEV_MSG_I20 6
1287#define EFI_DEV_MSG_MAC 11
1288#define EFI_DEV_MSG_IPV4 12
1289#define EFI_DEV_MSG_IPV6 13
1290#define EFI_DEV_MSG_INFINIBAND 9
1291#define EFI_DEV_MSG_UART 14
1292#define EFI_DEV_MSG_VENDOR 10
1293#define EFI_DEV_MEDIA 0x04
1294#define EFI_DEV_MEDIA_HARD_DRIVE 1
1295#define EFI_DEV_MEDIA_CDROM 2
1296#define EFI_DEV_MEDIA_VENDOR 3
1297#define EFI_DEV_MEDIA_FILE 4
1298#define EFI_DEV_MEDIA_PROTOCOL 5
1299#define EFI_DEV_BIOS_BOOT 0x05
1300#define EFI_DEV_END_PATH 0x7F
1301#define EFI_DEV_END_PATH2 0xFF
1302#define EFI_DEV_END_INSTANCE 0x01
1303#define EFI_DEV_END_ENTIRE 0xFF
1304
1305struct efi_generic_dev_path {
1306 u8 type;
1307 u8 sub_type;
1308 u16 length;
1309} __attribute ((packed));
1310
1311struct efi_dev_path {
1312 u8 type; /* can be replaced with unnamed */
1313 u8 sub_type; /* struct efi_generic_dev_path; */
1314 u16 length; /* once we've moved to -std=c11 */
1315 union {
1316 struct {
1317 u32 hid;
1318 u32 uid;
1319 } acpi;
1320 struct {
1321 u8 fn;
1322 u8 dev;
1323 } pci;
1324 };
1325} __attribute ((packed));
1326
1327#if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER)
1328struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len);
1329#endif
1330
1331static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1332{
1333 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1334 *addr &= PAGE_MASK;
1335}
1336
1337/*
1338 * EFI Variable support.
1339 *
1340 * Different firmware drivers can expose their EFI-like variables using
1341 * the following.
1342 */
1343
1344struct efivar_operations {
1345 efi_get_variable_t *get_variable;
1346 efi_get_next_variable_t *get_next_variable;
1347 efi_set_variable_t *set_variable;
1348 efi_set_variable_t *set_variable_nonblocking;
1349 efi_query_variable_store_t *query_variable_store;
1350};
1351
1352struct efivars {
1353 struct kset *kset;
1354 struct kobject *kobject;
1355 const struct efivar_operations *ops;
1356};
1357
1358/*
1359 * The maximum size of VariableName + Data = 1024
1360 * Therefore, it's reasonable to save that much
1361 * space in each part of the structure,
1362 * and we use a page for reading/writing.
1363 */
1364
1365#define EFI_VAR_NAME_LEN 1024
1366
1367struct efi_variable {
1368 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1369 efi_guid_t VendorGuid;
1370 unsigned long DataSize;
1371 __u8 Data[1024];
1372 efi_status_t Status;
1373 __u32 Attributes;
1374} __attribute__((packed));
1375
1376struct efivar_entry {
1377 struct efi_variable var;
1378 struct list_head list;
1379 struct kobject kobj;
1380 bool scanning;
1381 bool deleting;
1382};
1383
1384typedef struct {
1385 u32 reset;
1386 u32 output_string;
1387 u32 test_string;
1388} efi_simple_text_output_protocol_32_t;
1389
1390typedef struct {
1391 u64 reset;
1392 u64 output_string;
1393 u64 test_string;
1394} efi_simple_text_output_protocol_64_t;
1395
1396struct efi_simple_text_output_protocol {
1397 void *reset;
1398 efi_status_t (*output_string)(void *, void *);
1399 void *test_string;
1400};
1401
1402#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
1403#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
1404#define PIXEL_BIT_MASK 2
1405#define PIXEL_BLT_ONLY 3
1406#define PIXEL_FORMAT_MAX 4
1407
1408struct efi_pixel_bitmask {
1409 u32 red_mask;
1410 u32 green_mask;
1411 u32 blue_mask;
1412 u32 reserved_mask;
1413};
1414
1415struct efi_graphics_output_mode_info {
1416 u32 version;
1417 u32 horizontal_resolution;
1418 u32 vertical_resolution;
1419 int pixel_format;
1420 struct efi_pixel_bitmask pixel_information;
1421 u32 pixels_per_scan_line;
1422} __packed;
1423
1424struct efi_graphics_output_protocol_mode_32 {
1425 u32 max_mode;
1426 u32 mode;
1427 u32 info;
1428 u32 size_of_info;
1429 u64 frame_buffer_base;
1430 u32 frame_buffer_size;
1431} __packed;
1432
1433struct efi_graphics_output_protocol_mode_64 {
1434 u32 max_mode;
1435 u32 mode;
1436 u64 info;
1437 u64 size_of_info;
1438 u64 frame_buffer_base;
1439 u64 frame_buffer_size;
1440} __packed;
1441
1442struct efi_graphics_output_protocol_mode {
1443 u32 max_mode;
1444 u32 mode;
1445 unsigned long info;
1446 unsigned long size_of_info;
1447 u64 frame_buffer_base;
1448 unsigned long frame_buffer_size;
1449} __packed;
1450
1451struct efi_graphics_output_protocol_32 {
1452 u32 query_mode;
1453 u32 set_mode;
1454 u32 blt;
1455 u32 mode;
1456};
1457
1458struct efi_graphics_output_protocol_64 {
1459 u64 query_mode;
1460 u64 set_mode;
1461 u64 blt;
1462 u64 mode;
1463};
1464
1465struct efi_graphics_output_protocol {
1466 unsigned long query_mode;
1467 unsigned long set_mode;
1468 unsigned long blt;
1469 struct efi_graphics_output_protocol_mode *mode;
1470};
1471
1472typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
1473 struct efi_graphics_output_protocol *, u32, unsigned long *,
1474 struct efi_graphics_output_mode_info **);
1475
1476extern struct list_head efivar_sysfs_list;
1477
1478static inline void
1479efivar_unregister(struct efivar_entry *var)
1480{
1481 kobject_put(&var->kobj);
1482}
1483
1484int efivars_register(struct efivars *efivars,
1485 const struct efivar_operations *ops,
1486 struct kobject *kobject);
1487int efivars_unregister(struct efivars *efivars);
1488struct kobject *efivars_kobject(void);
1489
1490int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1491 void *data, bool duplicates, struct list_head *head);
1492
1493int efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1494int efivar_entry_remove(struct efivar_entry *entry);
1495
1496int __efivar_entry_delete(struct efivar_entry *entry);
1497int efivar_entry_delete(struct efivar_entry *entry);
1498
1499int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1500int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1501 unsigned long *size, void *data);
1502int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1503 unsigned long *size, void *data);
1504int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1505 unsigned long size, void *data, struct list_head *head);
1506int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1507 unsigned long *size, void *data, bool *set);
1508int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1509 bool block, unsigned long size, void *data);
1510
1511int efivar_entry_iter_begin(void);
1512void efivar_entry_iter_end(void);
1513
1514int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1515 struct list_head *head, void *data,
1516 struct efivar_entry **prev);
1517int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1518 struct list_head *head, void *data);
1519
1520struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1521 struct list_head *head, bool remove);
1522
1523bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1524 unsigned long data_size);
1525bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1526 size_t len);
1527
1528extern struct work_struct efivar_work;
1529void efivar_run_worker(void);
1530
1531#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1532int efivars_sysfs_init(void);
1533
1534#define EFIVARS_DATA_SIZE_MAX 1024
1535
1536#endif /* CONFIG_EFI_VARS */
1537extern bool efi_capsule_pending(int *reset_type);
1538
1539extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1540 size_t size, int *reset);
1541
1542extern int efi_capsule_update(efi_capsule_header_t *capsule,
1543 phys_addr_t *pages);
1544
1545#ifdef CONFIG_EFI_RUNTIME_MAP
1546int efi_runtime_map_init(struct kobject *);
1547int efi_get_runtime_map_size(void);
1548int efi_get_runtime_map_desc_size(void);
1549int efi_runtime_map_copy(void *buf, size_t bufsz);
1550#else
1551static inline int efi_runtime_map_init(struct kobject *kobj)
1552{
1553 return 0;
1554}
1555
1556static inline int efi_get_runtime_map_size(void)
1557{
1558 return 0;
1559}
1560
1561static inline int efi_get_runtime_map_desc_size(void)
1562{
1563 return 0;
1564}
1565
1566static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1567{
1568 return 0;
1569}
1570
1571#endif
1572
1573/* prototypes shared between arch specific and generic stub code */
1574
1575void efi_printk(efi_system_table_t *sys_table_arg, char *str);
1576
1577void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
1578 unsigned long addr);
1579
1580char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
1581 efi_loaded_image_t *image, int *cmd_line_len);
1582
1583efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
1584 struct efi_boot_memmap *map);
1585
1586efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
1587 unsigned long size, unsigned long align,
1588 unsigned long *addr);
1589
1590efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
1591 unsigned long size, unsigned long align,
1592 unsigned long *addr, unsigned long max);
1593
1594efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
1595 unsigned long *image_addr,
1596 unsigned long image_size,
1597 unsigned long alloc_size,
1598 unsigned long preferred_addr,
1599 unsigned long alignment);
1600
1601efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
1602 efi_loaded_image_t *image,
1603 char *cmd_line, char *option_string,
1604 unsigned long max_addr,
1605 unsigned long *load_addr,
1606 unsigned long *load_size);
1607
1608efi_status_t efi_parse_options(char const *cmdline);
1609
1610efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
1611 struct screen_info *si, efi_guid_t *proto,
1612 unsigned long size);
1613
1614bool efi_runtime_disabled(void);
1615extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1616extern unsigned long efi_call_virt_save_flags(void);
1617
1618enum efi_secureboot_mode {
1619 efi_secureboot_mode_unset,
1620 efi_secureboot_mode_unknown,
1621 efi_secureboot_mode_disabled,
1622 efi_secureboot_mode_enabled,
1623};
1624enum efi_secureboot_mode efi_get_secureboot(efi_system_table_t *sys_table);
1625
1626#ifdef CONFIG_RESET_ATTACK_MITIGATION
1627void efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg);
1628#else
1629static inline void
1630efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg) { }
1631#endif
1632
1633void efi_retrieve_tpm2_eventlog(efi_system_table_t *sys_table);
1634
1635/*
1636 * Arch code can implement the following three template macros, avoiding
1637 * reptition for the void/non-void return cases of {__,}efi_call_virt():
1638 *
1639 * * arch_efi_call_virt_setup()
1640 *
1641 * Sets up the environment for the call (e.g. switching page tables,
1642 * allowing kernel-mode use of floating point, if required).
1643 *
1644 * * arch_efi_call_virt()
1645 *
1646 * Performs the call. The last expression in the macro must be the call
1647 * itself, allowing the logic to be shared by the void and non-void
1648 * cases.
1649 *
1650 * * arch_efi_call_virt_teardown()
1651 *
1652 * Restores the usual kernel environment once the call has returned.
1653 */
1654
1655#define efi_call_virt_pointer(p, f, args...) \
1656({ \
1657 efi_status_t __s; \
1658 unsigned long __flags; \
1659 \
1660 arch_efi_call_virt_setup(); \
1661 \
1662 __flags = efi_call_virt_save_flags(); \
1663 __s = arch_efi_call_virt(p, f, args); \
1664 efi_call_virt_check_flags(__flags, __stringify(f)); \
1665 \
1666 arch_efi_call_virt_teardown(); \
1667 \
1668 __s; \
1669})
1670
1671#define __efi_call_virt_pointer(p, f, args...) \
1672({ \
1673 unsigned long __flags; \
1674 \
1675 arch_efi_call_virt_setup(); \
1676 \
1677 __flags = efi_call_virt_save_flags(); \
1678 arch_efi_call_virt(p, f, args); \
1679 efi_call_virt_check_flags(__flags, __stringify(f)); \
1680 \
1681 arch_efi_call_virt_teardown(); \
1682})
1683
1684typedef efi_status_t (*efi_exit_boot_map_processing)(
1685 efi_system_table_t *sys_table_arg,
1686 struct efi_boot_memmap *map,
1687 void *priv);
1688
1689efi_status_t efi_exit_boot_services(efi_system_table_t *sys_table,
1690 void *handle,
1691 struct efi_boot_memmap *map,
1692 void *priv,
1693 efi_exit_boot_map_processing priv_func);
1694
1695#define EFI_RANDOM_SEED_SIZE 64U
1696
1697struct linux_efi_random_seed {
1698 u32 size;
1699 u8 bits[];
1700};
1701
1702struct linux_efi_tpm_eventlog {
1703 u32 size;
1704 u8 version;
1705 u8 log[];
1706};
1707
1708extern int efi_tpm_eventlog_init(void);
1709
1710/*
1711 * efi_runtime_service() function identifiers.
1712 * "NONE" is used by efi_recover_from_page_fault() to check if the page
1713 * fault happened while executing an efi runtime service.
1714 */
1715enum efi_rts_ids {
1716 EFI_NONE,
1717 EFI_GET_TIME,
1718 EFI_SET_TIME,
1719 EFI_GET_WAKEUP_TIME,
1720 EFI_SET_WAKEUP_TIME,
1721 EFI_GET_VARIABLE,
1722 EFI_GET_NEXT_VARIABLE,
1723 EFI_SET_VARIABLE,
1724 EFI_QUERY_VARIABLE_INFO,
1725 EFI_GET_NEXT_HIGH_MONO_COUNT,
1726 EFI_RESET_SYSTEM,
1727 EFI_UPDATE_CAPSULE,
1728 EFI_QUERY_CAPSULE_CAPS,
1729};
1730
1731/*
1732 * efi_runtime_work: Details of EFI Runtime Service work
1733 * @arg<1-5>: EFI Runtime Service function arguments
1734 * @status: Status of executing EFI Runtime Service
1735 * @efi_rts_id: EFI Runtime Service function identifier
1736 * @efi_rts_comp: Struct used for handling completions
1737 */
1738struct efi_runtime_work {
1739 void *arg1;
1740 void *arg2;
1741 void *arg3;
1742 void *arg4;
1743 void *arg5;
1744 efi_status_t status;
1745 struct work_struct work;
1746 enum efi_rts_ids efi_rts_id;
1747 struct completion efi_rts_comp;
1748};
1749
1750extern struct efi_runtime_work efi_rts_work;
1751
1752/* Workqueue to queue EFI Runtime Services */
1753extern struct workqueue_struct *efi_rts_wq;
1754
1755struct linux_efi_memreserve {
1756 int size; // allocated size of the array
1757 atomic_t count; // number of entries used
1758 phys_addr_t next; // pa of next struct instance
1759 struct {
1760 phys_addr_t base;
1761 phys_addr_t size;
1762 } entry[0];
1763};
1764
1765#define EFI_MEMRESERVE_SIZE(count) (sizeof(struct linux_efi_memreserve) + \
1766 (count) * sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1767
1768#define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1769 / sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1770
1771#endif /* _LINUX_EFI_H */
1772