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

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