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TOMOYO Linux Cross Reference
Linux/include/linux/efi.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _LINUX_EFI_H
  3 #define _LINUX_EFI_H
  4 
  5 /*
  6  * Extensible Firmware Interface
  7  * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
  8  *
  9  * Copyright (C) 1999 VA Linux Systems
 10  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
 11  * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
 12  *      David Mosberger-Tang <davidm@hpl.hp.com>
 13  *      Stephane Eranian <eranian@hpl.hp.com>
 14  */
 15 #include <linux/init.h>
 16 #include <linux/string.h>
 17 #include <linux/time.h>
 18 #include <linux/types.h>
 19 #include <linux/proc_fs.h>
 20 #include <linux/rtc.h>
 21 #include <linux/ioport.h>
 22 #include <linux/pfn.h>
 23 #include <linux/pstore.h>
 24 #include <linux/range.h>
 25 #include <linux/reboot.h>
 26 #include <linux/uuid.h>
 27 #include <linux/screen_info.h>
 28 
 29 #include <asm/page.h>
 30 
 31 #define EFI_SUCCESS             0
 32 #define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
 33 #define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
 34 #define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
 35 #define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
 36 #define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
 37 #define EFI_NOT_READY           ( 6 | (1UL << (BITS_PER_LONG-1)))
 38 #define EFI_DEVICE_ERROR        ( 7 | (1UL << (BITS_PER_LONG-1)))
 39 #define EFI_WRITE_PROTECTED     ( 8 | (1UL << (BITS_PER_LONG-1)))
 40 #define EFI_OUT_OF_RESOURCES    ( 9 | (1UL << (BITS_PER_LONG-1)))
 41 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
 42 #define EFI_ABORTED             (21 | (1UL << (BITS_PER_LONG-1)))
 43 #define EFI_SECURITY_VIOLATION  (26 | (1UL << (BITS_PER_LONG-1)))
 44 
 45 typedef unsigned long efi_status_t;
 46 typedef u8 efi_bool_t;
 47 typedef u16 efi_char16_t;               /* UNICODE character */
 48 typedef u64 efi_physical_addr_t;
 49 typedef 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  */
 64 typedef 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  */
 72 typedef 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 
122 typedef 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 
131 typedef struct {
132         efi_guid_t guid;
133         u32 headersize;
134         u32 flags;
135         u32 imagesize;
136 } efi_capsule_header_t;
137 
138 struct 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 
154 struct 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 
166 int __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 
176 typedef 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 
185 typedef 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 
199 typedef struct {
200         u32 resolution;
201         u32 accuracy;
202         u8 sets_to_zero;
203 } efi_time_cap_t;
204 
205 typedef 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 
253 typedef 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  */
304 typedef 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 
355 typedef 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 
371 typedef enum {
372         EfiPciIoAttributeOperationGet,
373         EfiPciIoAttributeOperationSet,
374         EfiPciIoAttributeOperationEnable,
375         EfiPciIoAttributeOperationDisable,
376         EfiPciIoAttributeOperationSupported,
377     EfiPciIoAttributeOperationMaximum
378 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
379 
380 typedef struct {
381         u32 read;
382         u32 write;
383 } efi_pci_io_protocol_access_32_t;
384 
385 typedef struct {
386         u64 read;
387         u64 write;
388 } efi_pci_io_protocol_access_64_t;
389 
390 typedef struct {
391         void *read;
392         void *write;
393 } efi_pci_io_protocol_access_t;
394 
395 typedef 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 
415 typedef 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 
435 typedef 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 
475 typedef struct {
476         u32 version;
477         u32 get;
478         u32 set;
479         u32 del;
480         u32 get_all;
481 } apple_properties_protocol_32_t;
482 
483 typedef struct {
484         u64 version;
485         u64 get;
486         u64 set;
487         u64 del;
488         u64 get_all;
489 } apple_properties_protocol_64_t;
490 
491 typedef 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 
501 typedef 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 
511 typedef u32 efi_tcg2_event_log_format;
512 
513 typedef 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 
537 typedef 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 
555 typedef 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 
573 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
574 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
575 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
576                                             efi_time_t *tm);
577 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
578 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
579                                          unsigned long *data_size, void *data);
580 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
581                                               efi_guid_t *vendor);
582 typedef 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);
585 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
586 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
587                                  unsigned long data_size, efi_char16_t *data);
588 typedef 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);
592 typedef efi_status_t efi_query_variable_info_t(u32 attr,
593                                                u64 *storage_space,
594                                                u64 *remaining_space,
595                                                u64 *max_variable_size);
596 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
597                                           unsigned long count,
598                                           unsigned long sg_list);
599 typedef 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);
603 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
604                                                 unsigned long size,
605                                                 bool nonblocking);
606 
607 typedef 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 
625 void 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_TPM_FINAL_LOG_GUID            EFI_GUID(0x1e2ed096, 0x30e2, 0x4254,  0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
693 #define LINUX_EFI_MEMRESERVE_TABLE_GUID         EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5,  0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
694 
695 typedef struct {
696         efi_guid_t guid;
697         u64 table;
698 } efi_config_table_64_t;
699 
700 typedef struct {
701         efi_guid_t guid;
702         u32 table;
703 } efi_config_table_32_t;
704 
705 typedef struct {
706         efi_guid_t guid;
707         unsigned long table;
708 } efi_config_table_t;
709 
710 typedef struct {
711         efi_guid_t guid;
712         const char *name;
713         unsigned long *ptr;
714 } efi_config_table_type_t;
715 
716 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
717 
718 #define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))
719 #define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))
720 #define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))
721 #define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))
722 #define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))
723 #define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))
724 
725 typedef struct {
726         efi_table_hdr_t hdr;
727         u64 fw_vendor;  /* physical addr of CHAR16 vendor string */
728         u32 fw_revision;
729         u32 __pad1;
730         u64 con_in_handle;
731         u64 con_in;
732         u64 con_out_handle;
733         u64 con_out;
734         u64 stderr_handle;
735         u64 stderr;
736         u64 runtime;
737         u64 boottime;
738         u32 nr_tables;
739         u32 __pad2;
740         u64 tables;
741 } efi_system_table_64_t;
742 
743 typedef struct {
744         efi_table_hdr_t hdr;
745         u32 fw_vendor;  /* physical addr of CHAR16 vendor string */
746         u32 fw_revision;
747         u32 con_in_handle;
748         u32 con_in;
749         u32 con_out_handle;
750         u32 con_out;
751         u32 stderr_handle;
752         u32 stderr;
753         u32 runtime;
754         u32 boottime;
755         u32 nr_tables;
756         u32 tables;
757 } efi_system_table_32_t;
758 
759 typedef struct {
760         efi_table_hdr_t hdr;
761         unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
762         u32 fw_revision;
763         unsigned long con_in_handle;
764         unsigned long con_in;
765         unsigned long con_out_handle;
766         unsigned long con_out;
767         unsigned long stderr_handle;
768         unsigned long stderr;
769         efi_runtime_services_t *runtime;
770         efi_boot_services_t *boottime;
771         unsigned long nr_tables;
772         unsigned long tables;
773 } efi_system_table_t;
774 
775 /*
776  * Architecture independent structure for describing a memory map for the
777  * benefit of efi_memmap_init_early(), saving us the need to pass four
778  * parameters.
779  */
780 struct efi_memory_map_data {
781         phys_addr_t phys_map;
782         unsigned long size;
783         unsigned long desc_version;
784         unsigned long desc_size;
785 };
786 
787 struct efi_memory_map {
788         phys_addr_t phys_map;
789         void *map;
790         void *map_end;
791         int nr_map;
792         unsigned long desc_version;
793         unsigned long desc_size;
794         bool late;
795 };
796 
797 struct efi_mem_range {
798         struct range range;
799         u64 attribute;
800 };
801 
802 struct efi_fdt_params {
803         u64 system_table;
804         u64 mmap;
805         u32 mmap_size;
806         u32 desc_size;
807         u32 desc_ver;
808 };
809 
810 typedef struct {
811         u32 revision;
812         u32 parent_handle;
813         u32 system_table;
814         u32 device_handle;
815         u32 file_path;
816         u32 reserved;
817         u32 load_options_size;
818         u32 load_options;
819         u32 image_base;
820         __aligned_u64 image_size;
821         unsigned int image_code_type;
822         unsigned int image_data_type;
823         unsigned long unload;
824 } efi_loaded_image_32_t;
825 
826 typedef struct {
827         u32 revision;
828         u64 parent_handle;
829         u64 system_table;
830         u64 device_handle;
831         u64 file_path;
832         u64 reserved;
833         u32 load_options_size;
834         u64 load_options;
835         u64 image_base;
836         __aligned_u64 image_size;
837         unsigned int image_code_type;
838         unsigned int image_data_type;
839         unsigned long unload;
840 } efi_loaded_image_64_t;
841 
842 typedef struct {
843         u32 revision;
844         void *parent_handle;
845         efi_system_table_t *system_table;
846         void *device_handle;
847         void *file_path;
848         void *reserved;
849         u32 load_options_size;
850         void *load_options;
851         void *image_base;
852         __aligned_u64 image_size;
853         unsigned int image_code_type;
854         unsigned int image_data_type;
855         unsigned long unload;
856 } efi_loaded_image_t;
857 
858 
859 typedef struct {
860         u64 size;
861         u64 file_size;
862         u64 phys_size;
863         efi_time_t create_time;
864         efi_time_t last_access_time;
865         efi_time_t modification_time;
866         __aligned_u64 attribute;
867         efi_char16_t filename[1];
868 } efi_file_info_t;
869 
870 typedef struct {
871         u64 revision;
872         u32 open;
873         u32 close;
874         u32 delete;
875         u32 read;
876         u32 write;
877         u32 get_position;
878         u32 set_position;
879         u32 get_info;
880         u32 set_info;
881         u32 flush;
882 } efi_file_handle_32_t;
883 
884 typedef struct {
885         u64 revision;
886         u64 open;
887         u64 close;
888         u64 delete;
889         u64 read;
890         u64 write;
891         u64 get_position;
892         u64 set_position;
893         u64 get_info;
894         u64 set_info;
895         u64 flush;
896 } efi_file_handle_64_t;
897 
898 typedef struct _efi_file_handle {
899         u64 revision;
900         efi_status_t (*open)(struct _efi_file_handle *,
901                              struct _efi_file_handle **,
902                              efi_char16_t *, u64, u64);
903         efi_status_t (*close)(struct _efi_file_handle *);
904         void *delete;
905         efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
906                              void *);
907         void *write;
908         void *get_position;
909         void *set_position;
910         efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
911                         unsigned long *, void *);
912         void *set_info;
913         void *flush;
914 } efi_file_handle_t;
915 
916 typedef struct {
917         u64 revision;
918         u32 open_volume;
919 } efi_file_io_interface_32_t;
920 
921 typedef struct {
922         u64 revision;
923         u64 open_volume;
924 } efi_file_io_interface_64_t;
925 
926 typedef struct _efi_file_io_interface {
927         u64 revision;
928         int (*open_volume)(struct _efi_file_io_interface *,
929                            efi_file_handle_t **);
930 } efi_file_io_interface_t;
931 
932 #define EFI_FILE_MODE_READ      0x0000000000000001
933 #define EFI_FILE_MODE_WRITE     0x0000000000000002
934 #define EFI_FILE_MODE_CREATE    0x8000000000000000
935 
936 typedef struct {
937         u32 version;
938         u32 length;
939         u64 memory_protection_attribute;
940 } efi_properties_table_t;
941 
942 #define EFI_PROPERTIES_TABLE_VERSION    0x00010000
943 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
944 
945 #define EFI_INVALID_TABLE_ADDR          (~0UL)
946 
947 typedef struct {
948         u32 version;
949         u32 num_entries;
950         u32 desc_size;
951         u32 reserved;
952         efi_memory_desc_t entry[0];
953 } efi_memory_attributes_table_t;
954 
955 typedef struct {
956         efi_guid_t signature_owner;
957         u8 signature_data[];
958 } efi_signature_data_t;
959 
960 typedef struct {
961         efi_guid_t signature_type;
962         u32 signature_list_size;
963         u32 signature_header_size;
964         u32 signature_size;
965         u8 signature_header[];
966         /* efi_signature_data_t signatures[][] */
967 } efi_signature_list_t;
968 
969 typedef u8 efi_sha256_hash_t[32];
970 
971 typedef struct {
972         efi_sha256_hash_t to_be_signed_hash;
973         efi_time_t time_of_revocation;
974 } efi_cert_x509_sha256_t;
975 
976 /*
977  * All runtime access to EFI goes through this structure:
978  */
979 extern struct efi {
980         efi_system_table_t *systab;     /* EFI system table */
981         unsigned int runtime_version;   /* Runtime services version */
982         unsigned long mps;              /* MPS table */
983         unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
984         unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
985         unsigned long smbios;           /* SMBIOS table (32 bit entry point) */
986         unsigned long smbios3;          /* SMBIOS table (64 bit entry point) */
987         unsigned long sal_systab;       /* SAL system table */
988         unsigned long boot_info;        /* boot info table */
989         unsigned long hcdp;             /* HCDP table */
990         unsigned long uga;              /* UGA table */
991         unsigned long uv_systab;        /* UV system table */
992         unsigned long fw_vendor;        /* fw_vendor */
993         unsigned long runtime;          /* runtime table */
994         unsigned long config_table;     /* config tables */
995         unsigned long esrt;             /* ESRT table */
996         unsigned long properties_table; /* properties table */
997         unsigned long mem_attr_table;   /* memory attributes table */
998         unsigned long rng_seed;         /* UEFI firmware random seed */
999         unsigned long tpm_log;          /* TPM2 Event Log table */
1000         unsigned long tpm_final_log;    /* TPM2 Final Events Log table */
1001         unsigned long mem_reserve;      /* Linux EFI memreserve table */
1002         efi_get_time_t *get_time;
1003         efi_set_time_t *set_time;
1004         efi_get_wakeup_time_t *get_wakeup_time;
1005         efi_set_wakeup_time_t *set_wakeup_time;
1006         efi_get_variable_t *get_variable;
1007         efi_get_next_variable_t *get_next_variable;
1008         efi_set_variable_t *set_variable;
1009         efi_set_variable_t *set_variable_nonblocking;
1010         efi_query_variable_info_t *query_variable_info;
1011         efi_query_variable_info_t *query_variable_info_nonblocking;
1012         efi_update_capsule_t *update_capsule;
1013         efi_query_capsule_caps_t *query_capsule_caps;
1014         efi_get_next_high_mono_count_t *get_next_high_mono_count;
1015         efi_reset_system_t *reset_system;
1016         efi_set_virtual_address_map_t *set_virtual_address_map;
1017         struct efi_memory_map memmap;
1018         unsigned long flags;
1019 } efi;
1020 
1021 extern struct mm_struct efi_mm;
1022 
1023 static inline int
1024 efi_guidcmp (efi_guid_t left, efi_guid_t right)
1025 {
1026         return memcmp(&left, &right, sizeof (efi_guid_t));
1027 }
1028 
1029 static inline char *
1030 efi_guid_to_str(efi_guid_t *guid, char *out)
1031 {
1032         sprintf(out, "%pUl", guid->b);
1033         return out;
1034 }
1035 
1036 extern void efi_init (void);
1037 extern void *efi_get_pal_addr (void);
1038 extern void efi_map_pal_code (void);
1039 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
1040 extern void efi_gettimeofday (struct timespec64 *ts);
1041 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
1042 #ifdef CONFIG_X86
1043 extern efi_status_t efi_query_variable_store(u32 attributes,
1044                                              unsigned long size,
1045                                              bool nonblocking);
1046 extern void efi_find_mirror(void);
1047 #else
1048 
1049 static inline efi_status_t efi_query_variable_store(u32 attributes,
1050                                                     unsigned long size,
1051                                                     bool nonblocking)
1052 {
1053         return EFI_SUCCESS;
1054 }
1055 #endif
1056 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
1057 
1058 extern phys_addr_t __init efi_memmap_alloc(unsigned int num_entries);
1059 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
1060 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
1061 extern void __init efi_memmap_unmap(void);
1062 extern int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map);
1063 extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
1064                                          struct range *range);
1065 extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
1066                                      void *buf, struct efi_mem_range *mem);
1067 
1068 extern int efi_config_init(efi_config_table_type_t *arch_tables);
1069 #ifdef CONFIG_EFI_ESRT
1070 extern void __init efi_esrt_init(void);
1071 #else
1072 static inline void efi_esrt_init(void) { }
1073 #endif
1074 extern int efi_config_parse_tables(void *config_tables, int count, int sz,
1075                                    efi_config_table_type_t *arch_tables);
1076 extern u64 efi_get_iobase (void);
1077 extern int efi_mem_type(unsigned long phys_addr);
1078 extern u64 efi_mem_attributes (unsigned long phys_addr);
1079 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
1080 extern int __init efi_uart_console_only (void);
1081 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
1082 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
1083 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
1084 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
1085 extern void efi_initialize_iomem_resources(struct resource *code_resource,
1086                 struct resource *data_resource, struct resource *bss_resource);
1087 extern int efi_get_fdt_params(struct efi_fdt_params *params);
1088 extern struct kobject *efi_kobj;
1089 
1090 extern int efi_reboot_quirk_mode;
1091 extern bool efi_poweroff_required(void);
1092 
1093 #ifdef CONFIG_EFI_FAKE_MEMMAP
1094 extern void __init efi_fake_memmap(void);
1095 #else
1096 static inline void efi_fake_memmap(void) { }
1097 #endif
1098 
1099 /*
1100  * efi_memattr_perm_setter - arch specific callback function passed into
1101  *                           efi_memattr_apply_permissions() that updates the
1102  *                           mapping permissions described by the second
1103  *                           argument in the page tables referred to by the
1104  *                           first argument.
1105  */
1106 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
1107 
1108 extern int efi_memattr_init(void);
1109 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
1110                                          efi_memattr_perm_setter fn);
1111 
1112 /*
1113  * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
1114  * @map: the start of efi memmap
1115  * @desc_size: the size of space for each EFI memmap descriptor
1116  * @n: the index of efi memmap descriptor
1117  *
1118  * EFI boot service provides the GetMemoryMap() function to get a copy of the
1119  * current memory map which is an array of memory descriptors, each of
1120  * which describes a contiguous block of memory. It also gets the size of the
1121  * map, and the size of each descriptor, etc.
1122  *
1123  * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
1124  * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
1125  * since efi_memory_memdesc_t may be extended in the future. Thus the OS
1126  * MUST use the returned size of the descriptor to find the start of each
1127  * efi_memory_memdesc_t in the memory map array. This should only be used
1128  * during bootup since for_each_efi_memory_desc_xxx() is available after the
1129  * kernel initializes the EFI subsystem to set up struct efi_memory_map.
1130  */
1131 #define efi_early_memdesc_ptr(map, desc_size, n)                        \
1132         (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
1133 
1134 /* Iterate through an efi_memory_map */
1135 #define for_each_efi_memory_desc_in_map(m, md)                             \
1136         for ((md) = (m)->map;                                              \
1137              (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end;      \
1138              (md) = (void *)(md) + (m)->desc_size)
1139 
1140 /**
1141  * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1142  * @md: the efi_memory_desc_t * iterator
1143  *
1144  * Once the loop finishes @md must not be accessed.
1145  */
1146 #define for_each_efi_memory_desc(md) \
1147         for_each_efi_memory_desc_in_map(&efi.memmap, md)
1148 
1149 /*
1150  * Format an EFI memory descriptor's type and attributes to a user-provided
1151  * character buffer, as per snprintf(), and return the buffer.
1152  */
1153 char * __init efi_md_typeattr_format(char *buf, size_t size,
1154                                      const efi_memory_desc_t *md);
1155 
1156 
1157 typedef void (*efi_element_handler_t)(const char *source,
1158                                       const void *element_data,
1159                                       size_t element_size);
1160 extern int __init parse_efi_signature_list(
1161         const char *source,
1162         const void *data, size_t size,
1163         efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
1164 
1165 /**
1166  * efi_range_is_wc - check the WC bit on an address range
1167  * @start: starting kvirt address
1168  * @len: length of range
1169  *
1170  * Consult the EFI memory map and make sure it's ok to set this range WC.
1171  * Returns true or false.
1172  */
1173 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
1174 {
1175         unsigned long i;
1176 
1177         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
1178                 unsigned long paddr = __pa(start + i);
1179                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
1180                         return 0;
1181         }
1182         /* The range checked out */
1183         return 1;
1184 }
1185 
1186 #ifdef CONFIG_EFI_PCDP
1187 extern int __init efi_setup_pcdp_console(char *);
1188 #endif
1189 
1190 /*
1191  * We play games with efi_enabled so that the compiler will, if
1192  * possible, remove EFI-related code altogether.
1193  */
1194 #define EFI_BOOT                0       /* Were we booted from EFI? */
1195 #define EFI_CONFIG_TABLES       2       /* Can we use EFI config tables? */
1196 #define EFI_RUNTIME_SERVICES    3       /* Can we use runtime services? */
1197 #define EFI_MEMMAP              4       /* Can we use EFI memory map? */
1198 #define EFI_64BIT               5       /* Is the firmware 64-bit? */
1199 #define EFI_PARAVIRT            6       /* Access is via a paravirt interface */
1200 #define EFI_ARCH_1              7       /* First arch-specific bit */
1201 #define EFI_DBG                 8       /* Print additional debug info at runtime */
1202 #define EFI_NX_PE_DATA          9       /* Can runtime data regions be mapped non-executable? */
1203 #define EFI_MEM_ATTR            10      /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
1204 
1205 #ifdef CONFIG_EFI
1206 /*
1207  * Test whether the above EFI_* bits are enabled.
1208  */
1209 static inline bool efi_enabled(int feature)
1210 {
1211         return test_bit(feature, &efi.flags) != 0;
1212 }
1213 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1214 
1215 extern bool efi_is_table_address(unsigned long phys_addr);
1216 #else
1217 static inline bool efi_enabled(int feature)
1218 {
1219         return false;
1220 }
1221 static inline void
1222 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1223 
1224 static inline bool
1225 efi_capsule_pending(int *reset_type)
1226 {
1227         return false;
1228 }
1229 
1230 static inline bool efi_is_table_address(unsigned long phys_addr)
1231 {
1232         return false;
1233 }
1234 #endif
1235 
1236 extern int efi_status_to_err(efi_status_t status);
1237 
1238 /*
1239  * Variable Attributes
1240  */
1241 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
1242 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1243 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
1244 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1245 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1246 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1247 #define EFI_VARIABLE_APPEND_WRITE       0x0000000000000040
1248 
1249 #define EFI_VARIABLE_MASK       (EFI_VARIABLE_NON_VOLATILE | \
1250                                 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1251                                 EFI_VARIABLE_RUNTIME_ACCESS | \
1252                                 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1253                                 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1254                                 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1255                                 EFI_VARIABLE_APPEND_WRITE)
1256 /*
1257  * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1258  * not including trailing NUL
1259  */
1260 #define EFI_VARIABLE_GUID_LEN   UUID_STRING_LEN
1261 
1262 /*
1263  * The type of search to perform when calling boottime->locate_handle
1264  */
1265 #define EFI_LOCATE_ALL_HANDLES                  0
1266 #define EFI_LOCATE_BY_REGISTER_NOTIFY           1
1267 #define EFI_LOCATE_BY_PROTOCOL                  2
1268 
1269 /*
1270  * EFI Device Path information
1271  */
1272 #define EFI_DEV_HW                      0x01
1273 #define  EFI_DEV_PCI                             1
1274 #define  EFI_DEV_PCCARD                          2
1275 #define  EFI_DEV_MEM_MAPPED                      3
1276 #define  EFI_DEV_VENDOR                          4
1277 #define  EFI_DEV_CONTROLLER                      5
1278 #define EFI_DEV_ACPI                    0x02
1279 #define   EFI_DEV_BASIC_ACPI                     1
1280 #define   EFI_DEV_EXPANDED_ACPI                  2
1281 #define EFI_DEV_MSG                     0x03
1282 #define   EFI_DEV_MSG_ATAPI                      1
1283 #define   EFI_DEV_MSG_SCSI                       2
1284 #define   EFI_DEV_MSG_FC                         3
1285 #define   EFI_DEV_MSG_1394                       4
1286 #define   EFI_DEV_MSG_USB                        5
1287 #define   EFI_DEV_MSG_USB_CLASS                 15
1288 #define   EFI_DEV_MSG_I20                        6
1289 #define   EFI_DEV_MSG_MAC                       11
1290 #define   EFI_DEV_MSG_IPV4                      12
1291 #define   EFI_DEV_MSG_IPV6                      13
1292 #define   EFI_DEV_MSG_INFINIBAND                 9
1293 #define   EFI_DEV_MSG_UART                      14
1294 #define   EFI_DEV_MSG_VENDOR                    10
1295 #define EFI_DEV_MEDIA                   0x04
1296 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
1297 #define   EFI_DEV_MEDIA_CDROM                    2
1298 #define   EFI_DEV_MEDIA_VENDOR                   3
1299 #define   EFI_DEV_MEDIA_FILE                     4
1300 #define   EFI_DEV_MEDIA_PROTOCOL                 5
1301 #define EFI_DEV_BIOS_BOOT               0x05
1302 #define EFI_DEV_END_PATH                0x7F
1303 #define EFI_DEV_END_PATH2               0xFF
1304 #define   EFI_DEV_END_INSTANCE                  0x01
1305 #define   EFI_DEV_END_ENTIRE                    0xFF
1306 
1307 struct efi_generic_dev_path {
1308         u8 type;
1309         u8 sub_type;
1310         u16 length;
1311 } __attribute ((packed));
1312 
1313 struct efi_dev_path {
1314         u8 type;        /* can be replaced with unnamed */
1315         u8 sub_type;    /* struct efi_generic_dev_path; */
1316         u16 length;     /* once we've moved to -std=c11 */
1317         union {
1318                 struct {
1319                         u32 hid;
1320                         u32 uid;
1321                 } acpi;
1322                 struct {
1323                         u8 fn;
1324                         u8 dev;
1325                 } pci;
1326         };
1327 } __attribute ((packed));
1328 
1329 #if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER)
1330 struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len);
1331 #endif
1332 
1333 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1334 {
1335         *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1336         *addr &= PAGE_MASK;
1337 }
1338 
1339 /*
1340  * EFI Variable support.
1341  *
1342  * Different firmware drivers can expose their EFI-like variables using
1343  * the following.
1344  */
1345 
1346 struct efivar_operations {
1347         efi_get_variable_t *get_variable;
1348         efi_get_next_variable_t *get_next_variable;
1349         efi_set_variable_t *set_variable;
1350         efi_set_variable_t *set_variable_nonblocking;
1351         efi_query_variable_store_t *query_variable_store;
1352 };
1353 
1354 struct efivars {
1355         struct kset *kset;
1356         struct kobject *kobject;
1357         const struct efivar_operations *ops;
1358 };
1359 
1360 /*
1361  * The maximum size of VariableName + Data = 1024
1362  * Therefore, it's reasonable to save that much
1363  * space in each part of the structure,
1364  * and we use a page for reading/writing.
1365  */
1366 
1367 #define EFI_VAR_NAME_LEN        1024
1368 
1369 struct efi_variable {
1370         efi_char16_t  VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1371         efi_guid_t    VendorGuid;
1372         unsigned long DataSize;
1373         __u8          Data[1024];
1374         efi_status_t  Status;
1375         __u32         Attributes;
1376 } __attribute__((packed));
1377 
1378 struct efivar_entry {
1379         struct efi_variable var;
1380         struct list_head list;
1381         struct kobject kobj;
1382         bool scanning;
1383         bool deleting;
1384 };
1385 
1386 typedef struct {
1387         u32 reset;
1388         u32 output_string;
1389         u32 test_string;
1390 } efi_simple_text_output_protocol_32_t;
1391 
1392 typedef struct {
1393         u64 reset;
1394         u64 output_string;
1395         u64 test_string;
1396 } efi_simple_text_output_protocol_64_t;
1397 
1398 struct efi_simple_text_output_protocol {
1399         void *reset;
1400         efi_status_t (*output_string)(void *, void *);
1401         void *test_string;
1402 };
1403 
1404 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR               0
1405 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR               1
1406 #define PIXEL_BIT_MASK                                  2
1407 #define PIXEL_BLT_ONLY                                  3
1408 #define PIXEL_FORMAT_MAX                                4
1409 
1410 struct efi_pixel_bitmask {
1411         u32 red_mask;
1412         u32 green_mask;
1413         u32 blue_mask;
1414         u32 reserved_mask;
1415 };
1416 
1417 struct efi_graphics_output_mode_info {
1418         u32 version;
1419         u32 horizontal_resolution;
1420         u32 vertical_resolution;
1421         int pixel_format;
1422         struct efi_pixel_bitmask pixel_information;
1423         u32 pixels_per_scan_line;
1424 } __packed;
1425 
1426 struct efi_graphics_output_protocol_mode_32 {
1427         u32 max_mode;
1428         u32 mode;
1429         u32 info;
1430         u32 size_of_info;
1431         u64 frame_buffer_base;
1432         u32 frame_buffer_size;
1433 } __packed;
1434 
1435 struct efi_graphics_output_protocol_mode_64 {
1436         u32 max_mode;
1437         u32 mode;
1438         u64 info;
1439         u64 size_of_info;
1440         u64 frame_buffer_base;
1441         u64 frame_buffer_size;
1442 } __packed;
1443 
1444 struct efi_graphics_output_protocol_mode {
1445         u32 max_mode;
1446         u32 mode;
1447         unsigned long info;
1448         unsigned long size_of_info;
1449         u64 frame_buffer_base;
1450         unsigned long frame_buffer_size;
1451 } __packed;
1452 
1453 struct efi_graphics_output_protocol_32 {
1454         u32 query_mode;
1455         u32 set_mode;
1456         u32 blt;
1457         u32 mode;
1458 };
1459 
1460 struct efi_graphics_output_protocol_64 {
1461         u64 query_mode;
1462         u64 set_mode;
1463         u64 blt;
1464         u64 mode;
1465 };
1466 
1467 struct efi_graphics_output_protocol {
1468         unsigned long query_mode;
1469         unsigned long set_mode;
1470         unsigned long blt;
1471         struct efi_graphics_output_protocol_mode *mode;
1472 };
1473 
1474 typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
1475         struct efi_graphics_output_protocol *, u32, unsigned long *,
1476         struct efi_graphics_output_mode_info **);
1477 
1478 extern struct list_head efivar_sysfs_list;
1479 
1480 static inline void
1481 efivar_unregister(struct efivar_entry *var)
1482 {
1483         kobject_put(&var->kobj);
1484 }
1485 
1486 int efivars_register(struct efivars *efivars,
1487                      const struct efivar_operations *ops,
1488                      struct kobject *kobject);
1489 int efivars_unregister(struct efivars *efivars);
1490 struct kobject *efivars_kobject(void);
1491 
1492 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1493                 void *data, bool duplicates, struct list_head *head);
1494 
1495 int efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1496 int efivar_entry_remove(struct efivar_entry *entry);
1497 
1498 int __efivar_entry_delete(struct efivar_entry *entry);
1499 int efivar_entry_delete(struct efivar_entry *entry);
1500 
1501 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1502 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1503                        unsigned long *size, void *data);
1504 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1505                      unsigned long *size, void *data);
1506 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1507                      unsigned long size, void *data, struct list_head *head);
1508 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1509                               unsigned long *size, void *data, bool *set);
1510 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1511                           bool block, unsigned long size, void *data);
1512 
1513 int efivar_entry_iter_begin(void);
1514 void efivar_entry_iter_end(void);
1515 
1516 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1517                         struct list_head *head, void *data,
1518                         struct efivar_entry **prev);
1519 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1520                       struct list_head *head, void *data);
1521 
1522 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1523                                        struct list_head *head, bool remove);
1524 
1525 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1526                      unsigned long data_size);
1527 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1528                                   size_t len);
1529 
1530 extern struct work_struct efivar_work;
1531 void efivar_run_worker(void);
1532 
1533 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1534 int efivars_sysfs_init(void);
1535 
1536 #define EFIVARS_DATA_SIZE_MAX 1024
1537 
1538 #endif /* CONFIG_EFI_VARS */
1539 extern bool efi_capsule_pending(int *reset_type);
1540 
1541 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1542                                  size_t size, int *reset);
1543 
1544 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1545                               phys_addr_t *pages);
1546 
1547 #ifdef CONFIG_EFI_RUNTIME_MAP
1548 int efi_runtime_map_init(struct kobject *);
1549 int efi_get_runtime_map_size(void);
1550 int efi_get_runtime_map_desc_size(void);
1551 int efi_runtime_map_copy(void *buf, size_t bufsz);
1552 #else
1553 static inline int efi_runtime_map_init(struct kobject *kobj)
1554 {
1555         return 0;
1556 }
1557 
1558 static inline int efi_get_runtime_map_size(void)
1559 {
1560         return 0;
1561 }
1562 
1563 static inline int efi_get_runtime_map_desc_size(void)
1564 {
1565         return 0;
1566 }
1567 
1568 static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1569 {
1570         return 0;
1571 }
1572 
1573 #endif
1574 
1575 /* prototypes shared between arch specific and generic stub code */
1576 
1577 void efi_printk(efi_system_table_t *sys_table_arg, char *str);
1578 
1579 void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
1580               unsigned long addr);
1581 
1582 char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
1583                           efi_loaded_image_t *image, int *cmd_line_len);
1584 
1585 efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
1586                                 struct efi_boot_memmap *map);
1587 
1588 efi_status_t efi_low_alloc_above(efi_system_table_t *sys_table_arg,
1589                                  unsigned long size, unsigned long align,
1590                                  unsigned long *addr, unsigned long min);
1591 
1592 static inline
1593 efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
1594                            unsigned long size, unsigned long align,
1595                            unsigned long *addr)
1596 {
1597         /*
1598          * Don't allocate at 0x0. It will confuse code that
1599          * checks pointers against NULL. Skip the first 8
1600          * bytes so we start at a nice even number.
1601          */
1602         return efi_low_alloc_above(sys_table_arg, size, align, addr, 0x8);
1603 }
1604 
1605 efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
1606                             unsigned long size, unsigned long align,
1607                             unsigned long *addr, unsigned long max);
1608 
1609 efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
1610                                  unsigned long *image_addr,
1611                                  unsigned long image_size,
1612                                  unsigned long alloc_size,
1613                                  unsigned long preferred_addr,
1614                                  unsigned long alignment,
1615                                  unsigned long min_addr);
1616 
1617 efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
1618                                   efi_loaded_image_t *image,
1619                                   char *cmd_line, char *option_string,
1620                                   unsigned long max_addr,
1621                                   unsigned long *load_addr,
1622                                   unsigned long *load_size);
1623 
1624 efi_status_t efi_parse_options(char const *cmdline);
1625 
1626 efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
1627                            struct screen_info *si, efi_guid_t *proto,
1628                            unsigned long size);
1629 
1630 #ifdef CONFIG_EFI
1631 extern bool efi_runtime_disabled(void);
1632 #else
1633 static inline bool efi_runtime_disabled(void) { return true; }
1634 #endif
1635 
1636 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1637 extern unsigned long efi_call_virt_save_flags(void);
1638 
1639 enum efi_secureboot_mode {
1640         efi_secureboot_mode_unset,
1641         efi_secureboot_mode_unknown,
1642         efi_secureboot_mode_disabled,
1643         efi_secureboot_mode_enabled,
1644 };
1645 enum efi_secureboot_mode efi_get_secureboot(efi_system_table_t *sys_table);
1646 
1647 #ifdef CONFIG_RESET_ATTACK_MITIGATION
1648 void efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg);
1649 #else
1650 static inline void
1651 efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg) { }
1652 #endif
1653 
1654 void efi_retrieve_tpm2_eventlog(efi_system_table_t *sys_table);
1655 
1656 /*
1657  * Arch code can implement the following three template macros, avoiding
1658  * reptition for the void/non-void return cases of {__,}efi_call_virt():
1659  *
1660  *  * arch_efi_call_virt_setup()
1661  *
1662  *    Sets up the environment for the call (e.g. switching page tables,
1663  *    allowing kernel-mode use of floating point, if required).
1664  *
1665  *  * arch_efi_call_virt()
1666  *
1667  *    Performs the call. The last expression in the macro must be the call
1668  *    itself, allowing the logic to be shared by the void and non-void
1669  *    cases.
1670  *
1671  *  * arch_efi_call_virt_teardown()
1672  *
1673  *    Restores the usual kernel environment once the call has returned.
1674  */
1675 
1676 #define efi_call_virt_pointer(p, f, args...)                            \
1677 ({                                                                      \
1678         efi_status_t __s;                                               \
1679         unsigned long __flags;                                          \
1680                                                                         \
1681         arch_efi_call_virt_setup();                                     \
1682                                                                         \
1683         __flags = efi_call_virt_save_flags();                           \
1684         __s = arch_efi_call_virt(p, f, args);                           \
1685         efi_call_virt_check_flags(__flags, __stringify(f));             \
1686                                                                         \
1687         arch_efi_call_virt_teardown();                                  \
1688                                                                         \
1689         __s;                                                            \
1690 })
1691 
1692 #define __efi_call_virt_pointer(p, f, args...)                          \
1693 ({                                                                      \
1694         unsigned long __flags;                                          \
1695                                                                         \
1696         arch_efi_call_virt_setup();                                     \
1697                                                                         \
1698         __flags = efi_call_virt_save_flags();                           \
1699         arch_efi_call_virt(p, f, args);                                 \
1700         efi_call_virt_check_flags(__flags, __stringify(f));             \
1701                                                                         \
1702         arch_efi_call_virt_teardown();                                  \
1703 })
1704 
1705 typedef efi_status_t (*efi_exit_boot_map_processing)(
1706         efi_system_table_t *sys_table_arg,
1707         struct efi_boot_memmap *map,
1708         void *priv);
1709 
1710 efi_status_t efi_exit_boot_services(efi_system_table_t *sys_table,
1711                                     void *handle,
1712                                     struct efi_boot_memmap *map,
1713                                     void *priv,
1714                                     efi_exit_boot_map_processing priv_func);
1715 
1716 #define EFI_RANDOM_SEED_SIZE            64U
1717 
1718 struct linux_efi_random_seed {
1719         u32     size;
1720         u8      bits[];
1721 };
1722 
1723 struct linux_efi_tpm_eventlog {
1724         u32     size;
1725         u32     final_events_preboot_size;
1726         u8      version;
1727         u8      log[];
1728 };
1729 
1730 extern int efi_tpm_eventlog_init(void);
1731 
1732 struct efi_tcg2_final_events_table {
1733         u64 version;
1734         u64 nr_events;
1735         u8 events[];
1736 };
1737 extern int efi_tpm_final_log_size;
1738 
1739 /*
1740  * efi_runtime_service() function identifiers.
1741  * "NONE" is used by efi_recover_from_page_fault() to check if the page
1742  * fault happened while executing an efi runtime service.
1743  */
1744 enum efi_rts_ids {
1745         EFI_NONE,
1746         EFI_GET_TIME,
1747         EFI_SET_TIME,
1748         EFI_GET_WAKEUP_TIME,
1749         EFI_SET_WAKEUP_TIME,
1750         EFI_GET_VARIABLE,
1751         EFI_GET_NEXT_VARIABLE,
1752         EFI_SET_VARIABLE,
1753         EFI_QUERY_VARIABLE_INFO,
1754         EFI_GET_NEXT_HIGH_MONO_COUNT,
1755         EFI_RESET_SYSTEM,
1756         EFI_UPDATE_CAPSULE,
1757         EFI_QUERY_CAPSULE_CAPS,
1758 };
1759 
1760 /*
1761  * efi_runtime_work:    Details of EFI Runtime Service work
1762  * @arg<1-5>:           EFI Runtime Service function arguments
1763  * @status:             Status of executing EFI Runtime Service
1764  * @efi_rts_id:         EFI Runtime Service function identifier
1765  * @efi_rts_comp:       Struct used for handling completions
1766  */
1767 struct efi_runtime_work {
1768         void *arg1;
1769         void *arg2;
1770         void *arg3;
1771         void *arg4;
1772         void *arg5;
1773         efi_status_t status;
1774         struct work_struct work;
1775         enum efi_rts_ids efi_rts_id;
1776         struct completion efi_rts_comp;
1777 };
1778 
1779 extern struct efi_runtime_work efi_rts_work;
1780 
1781 /* Workqueue to queue EFI Runtime Services */
1782 extern struct workqueue_struct *efi_rts_wq;
1783 
1784 struct linux_efi_memreserve {
1785         int             size;                   // allocated size of the array
1786         atomic_t        count;                  // number of entries used
1787         phys_addr_t     next;                   // pa of next struct instance
1788         struct {
1789                 phys_addr_t     base;
1790                 phys_addr_t     size;
1791         } entry[0];
1792 };
1793 
1794 #define EFI_MEMRESERVE_SIZE(count) (sizeof(struct linux_efi_memreserve) + \
1795         (count) * sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1796 
1797 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1798         / sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1799 
1800 #endif /* _LINUX_EFI_H */
1801 

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