1 /* SPDX-License-Identifier: GPL-2.0 */
6 * Extensible Firmware Interface
7 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
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>
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>
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)))
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;
51 #if defined(CONFIG_X86_64)
52 #define __efiapi __attribute__((ms_abi))
53 #elif defined(CONFIG_X86_32)
54 #define __efiapi __attribute__((regparm(0)))
59 #define efi_get_handle_at(array, idx) \
60 (efi_is_native() ? (array)[idx] \
61 : (efi_handle_t)(unsigned long)((u32 *)(array))[idx])
63 #define efi_get_handle_num(size) \
64 ((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32)))
66 #define for_each_efi_handle(handle, array, size, i) \
68 i < efi_get_handle_num(size) && \
69 ((handle = efi_get_handle_at((array), i)) || true); \
73 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as
74 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
75 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM),
76 * this means that firmware services invoked by the kernel may assume that
77 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that
78 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits.
80 * Note that the UEFI spec as well as some comments in the EDK2 code base
81 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be
82 * a mistake, given that no code seems to exist that actually enforces that
85 typedef guid_t efi_guid_t __aligned(__alignof__(u32));
87 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
88 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
91 * Generic EFI table header
102 * Memory map descriptor:
106 #define EFI_RESERVED_TYPE 0
107 #define EFI_LOADER_CODE 1
108 #define EFI_LOADER_DATA 2
109 #define EFI_BOOT_SERVICES_CODE 3
110 #define EFI_BOOT_SERVICES_DATA 4
111 #define EFI_RUNTIME_SERVICES_CODE 5
112 #define EFI_RUNTIME_SERVICES_DATA 6
113 #define EFI_CONVENTIONAL_MEMORY 7
114 #define EFI_UNUSABLE_MEMORY 8
115 #define EFI_ACPI_RECLAIM_MEMORY 9
116 #define EFI_ACPI_MEMORY_NVS 10
117 #define EFI_MEMORY_MAPPED_IO 11
118 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
119 #define EFI_PAL_CODE 13
120 #define EFI_PERSISTENT_MEMORY 14
121 #define EFI_MAX_MEMORY_TYPE 15
123 /* Attribute values: */
124 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
125 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
126 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
127 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
128 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
129 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
130 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
131 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
132 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
133 #define EFI_MEMORY_MORE_RELIABLE \
134 ((u64)0x0000000000010000ULL) /* higher reliability */
135 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
136 #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */
137 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
138 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
140 #define EFI_PAGE_SHIFT 12
141 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
142 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
158 } efi_capsule_header_t;
160 struct efi_boot_memmap {
161 efi_memory_desc_t **map;
162 unsigned long *map_size;
163 unsigned long *desc_size;
165 unsigned long *key_ptr;
166 unsigned long *buff_size;
172 #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
173 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
174 #define EFI_CAPSULE_INITIATE_RESET 0x00040000
176 struct capsule_info {
177 efi_capsule_header_t header;
178 efi_capsule_header_t *capsule;
185 size_t page_bytes_remain;
188 int __efi_capsule_setup_info(struct capsule_info *cap_info);
191 * Allocation types for calls to boottime->allocate_pages.
193 #define EFI_ALLOCATE_ANY_PAGES 0
194 #define EFI_ALLOCATE_MAX_ADDRESS 1
195 #define EFI_ALLOCATE_ADDRESS 2
196 #define EFI_MAX_ALLOCATE_TYPE 3
198 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
201 * Types and defines for Time Services
203 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
204 #define EFI_TIME_IN_DAYLIGHT 0x2
205 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
242 u32 install_protocol_interface;
243 u32 reinstall_protocol_interface;
244 u32 uninstall_protocol_interface;
247 u32 register_protocol_notify;
249 u32 locate_device_path;
250 u32 install_configuration_table;
255 u32 exit_boot_services;
256 u32 get_next_monotonic_count;
258 u32 set_watchdog_timer;
259 u32 connect_controller;
260 u32 disconnect_controller;
263 u32 open_protocol_information;
264 u32 protocols_per_handle;
265 u32 locate_handle_buffer;
267 u32 install_multiple_protocol_interfaces;
268 u32 uninstall_multiple_protocol_interfaces;
273 } __packed efi_boot_services_32_t;
276 * EFI Boot Services table
283 efi_status_t (__efiapi *allocate_pages)(int, int, unsigned long,
284 efi_physical_addr_t *);
285 efi_status_t (__efiapi *free_pages)(efi_physical_addr_t,
287 efi_status_t (__efiapi *get_memory_map)(unsigned long *, void *,
289 unsigned long *, u32 *);
290 efi_status_t (__efiapi *allocate_pool)(int, unsigned long,
292 efi_status_t (__efiapi *free_pool)(void *);
295 void *wait_for_event;
299 void *install_protocol_interface;
300 void *reinstall_protocol_interface;
301 void *uninstall_protocol_interface;
302 efi_status_t (__efiapi *handle_protocol)(efi_handle_t,
303 efi_guid_t *, void **);
305 void *register_protocol_notify;
306 efi_status_t (__efiapi *locate_handle)(int, efi_guid_t *,
307 void *, unsigned long *,
309 void *locate_device_path;
310 efi_status_t (__efiapi *install_configuration_table)(efi_guid_t *,
316 efi_status_t (__efiapi *exit_boot_services)(efi_handle_t,
318 void *get_next_monotonic_count;
320 void *set_watchdog_timer;
321 void *connect_controller;
322 efi_status_t (__efiapi *disconnect_controller)(efi_handle_t,
326 void *close_protocol;
327 void *open_protocol_information;
328 void *protocols_per_handle;
329 void *locate_handle_buffer;
330 efi_status_t (__efiapi *locate_protocol)(efi_guid_t *, void *,
332 void *install_multiple_protocol_interfaces;
333 void *uninstall_multiple_protocol_interfaces;
334 void *calculate_crc32;
337 void *create_event_ex;
339 efi_boot_services_32_t mixed_mode;
340 } efi_boot_services_t;
347 EfiPciIoWidthFifoUint8,
348 EfiPciIoWidthFifoUint16,
349 EfiPciIoWidthFifoUint32,
350 EfiPciIoWidthFifoUint64,
351 EfiPciIoWidthFillUint8,
352 EfiPciIoWidthFillUint16,
353 EfiPciIoWidthFillUint32,
354 EfiPciIoWidthFillUint64,
356 } EFI_PCI_IO_PROTOCOL_WIDTH;
359 EfiPciIoAttributeOperationGet,
360 EfiPciIoAttributeOperationSet,
361 EfiPciIoAttributeOperationEnable,
362 EfiPciIoAttributeOperationDisable,
363 EfiPciIoAttributeOperationSupported,
364 EfiPciIoAttributeOperationMaximum
365 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
370 } efi_pci_io_protocol_access_32_t;
372 typedef union efi_pci_io_protocol efi_pci_io_protocol_t;
375 efi_status_t (__efiapi *efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *,
376 EFI_PCI_IO_PROTOCOL_WIDTH,
384 } efi_pci_io_protocol_access_t;
387 efi_pci_io_protocol_cfg_t read;
388 efi_pci_io_protocol_cfg_t write;
389 } efi_pci_io_protocol_config_access_t;
391 union efi_pci_io_protocol {
395 efi_pci_io_protocol_access_t mem;
396 efi_pci_io_protocol_access_t io;
397 efi_pci_io_protocol_config_access_t pci;
401 void *allocate_buffer;
404 efi_status_t (__efiapi *get_location)(efi_pci_io_protocol_t *,
405 unsigned long *segment_nr,
406 unsigned long *bus_nr,
407 unsigned long *device_nr,
408 unsigned long *func_nr);
410 void *get_bar_attributes;
411 void *set_bar_attributes;
418 efi_pci_io_protocol_access_32_t mem;
419 efi_pci_io_protocol_access_32_t io;
420 efi_pci_io_protocol_access_32_t pci;
429 u32 get_bar_attributes;
430 u32 set_bar_attributes;
436 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
437 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
438 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
439 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
440 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
441 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
442 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
443 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
444 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
445 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
446 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
447 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
448 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
449 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
450 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
451 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
452 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
453 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
454 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
458 typedef union apple_properties_protocol apple_properties_protocol_t;
460 union apple_properties_protocol {
462 unsigned long version;
463 efi_status_t (__efiapi *get)(apple_properties_protocol_t *,
464 struct efi_dev_path *,
465 efi_char16_t *, void *, u32 *);
466 efi_status_t (__efiapi *set)(apple_properties_protocol_t *,
467 struct efi_dev_path *,
468 efi_char16_t *, void *, u32);
469 efi_status_t (__efiapi *del)(apple_properties_protocol_t *,
470 struct efi_dev_path *,
472 efi_status_t (__efiapi *get_all)(apple_properties_protocol_t *,
473 void *buffer, u32 *);
484 typedef u32 efi_tcg2_event_log_format;
486 typedef union efi_tcg2_protocol efi_tcg2_protocol_t;
488 union efi_tcg2_protocol {
490 void *get_capability;
491 efi_status_t (__efiapi *get_event_log)(efi_handle_t,
492 efi_tcg2_event_log_format,
493 efi_physical_addr_t *,
494 efi_physical_addr_t *,
496 void *hash_log_extend_event;
497 void *submit_command;
498 void *get_active_pcr_banks;
499 void *set_active_pcr_banks;
500 void *get_result_of_set_active_pcr_banks;
505 u32 hash_log_extend_event;
507 u32 get_active_pcr_banks;
508 u32 set_active_pcr_banks;
509 u32 get_result_of_set_active_pcr_banks;
514 * Types and defines for EFI ResetSystem
516 #define EFI_RESET_COLD 0
517 #define EFI_RESET_WARM 1
518 #define EFI_RESET_SHUTDOWN 2
521 * EFI Runtime Services table
523 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
524 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
532 u32 set_virtual_address_map;
535 u32 get_next_variable;
537 u32 get_next_high_mono_count;
540 u32 query_capsule_caps;
541 u32 query_variable_info;
542 } efi_runtime_services_32_t;
544 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
545 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
546 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
548 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
549 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
550 unsigned long *data_size, void *data);
551 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
553 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
554 u32 attr, unsigned long data_size,
556 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
557 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
558 unsigned long data_size, efi_char16_t *data);
559 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
560 unsigned long descriptor_size,
561 u32 descriptor_version,
562 efi_memory_desc_t *virtual_map);
563 typedef efi_status_t efi_query_variable_info_t(u32 attr,
565 u64 *remaining_space,
566 u64 *max_variable_size);
567 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
569 unsigned long sg_list);
570 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
574 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
581 efi_get_time_t __efiapi *get_time;
582 efi_set_time_t __efiapi *set_time;
583 efi_get_wakeup_time_t __efiapi *get_wakeup_time;
584 efi_set_wakeup_time_t __efiapi *set_wakeup_time;
585 efi_set_virtual_address_map_t __efiapi *set_virtual_address_map;
586 void *convert_pointer;
587 efi_get_variable_t __efiapi *get_variable;
588 efi_get_next_variable_t __efiapi *get_next_variable;
589 efi_set_variable_t __efiapi *set_variable;
590 efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count;
591 efi_reset_system_t __efiapi *reset_system;
592 efi_update_capsule_t __efiapi *update_capsule;
593 efi_query_capsule_caps_t __efiapi *query_capsule_caps;
594 efi_query_variable_info_t __efiapi *query_variable_info;
596 efi_runtime_services_32_t mixed_mode;
597 } efi_runtime_services_t;
599 void efi_native_runtime_setup(void);
602 * EFI Configuration Table and GUID definitions
604 * These are all defined in a single line to make them easier to
605 * grep for and to see them at a glance - while still having a
606 * similar structure to the definitions in the spec.
608 * Here's how they are structured:
610 * GUID: 12345678-1234-1234-1234-123456789012
612 * #define EFI_SOME_PROTOCOL_GUID \
613 * {0x12345678,0x1234,0x1234,\
614 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
616 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
617 * ^ tabs ^extra space
619 * Note that the 'extra space' separates the values at the same place
620 * where the UEFI SPEC breaks the line.
622 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
623 #define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
624 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
625 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
626 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
627 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
628 #define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
629 #define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
630 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
631 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
632 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
633 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
634 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
635 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
636 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
637 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
638 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
639 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
640 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
641 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
642 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
643 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
644 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
645 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
646 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
647 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
648 #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
650 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
651 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
653 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
654 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
655 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
658 * This GUID is used to pass to the kernel proper the struct screen_info
659 * structure that was populated by the stub based on the GOP protocol instance
660 * associated with ConOut
662 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
663 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
664 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
665 #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
666 #define LINUX_EFI_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
667 #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
670 #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
675 } efi_config_table_64_t;
680 } efi_config_table_32_t;
687 efi_config_table_32_t mixed_mode;
688 } efi_config_table_t;
694 } efi_config_table_type_t;
696 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
698 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
699 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
700 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
701 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
702 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
703 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
707 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
721 } efi_system_table_64_t;
725 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
737 } efi_system_table_32_t;
739 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
744 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
746 unsigned long con_in_handle;
747 unsigned long con_in;
748 unsigned long con_out_handle;
749 efi_simple_text_output_protocol_t *con_out;
750 unsigned long stderr_handle;
751 unsigned long stderr;
752 efi_runtime_services_t *runtime;
753 efi_boot_services_t *boottime;
754 unsigned long nr_tables;
755 unsigned long tables;
757 efi_system_table_32_t mixed_mode;
758 } efi_system_table_t;
761 * Architecture independent structure for describing a memory map for the
762 * benefit of efi_memmap_init_early(), and for passing context between
763 * efi_memmap_alloc() and efi_memmap_install().
765 struct efi_memory_map_data {
766 phys_addr_t phys_map;
768 unsigned long desc_version;
769 unsigned long desc_size;
773 struct efi_memory_map {
774 phys_addr_t phys_map;
778 unsigned long desc_version;
779 unsigned long desc_size;
780 #define EFI_MEMMAP_LATE (1UL << 0)
781 #define EFI_MEMMAP_MEMBLOCK (1UL << 1)
782 #define EFI_MEMMAP_SLAB (1UL << 2)
786 struct efi_mem_range {
791 struct efi_fdt_params {
801 efi_handle_t parent_handle;
802 efi_system_table_t *system_table;
803 efi_handle_t device_handle;
806 u32 load_options_size;
809 __aligned_u64 image_size;
810 unsigned int image_code_type;
811 unsigned int image_data_type;
812 efi_status_t ( __efiapi *unload)(efi_handle_t image_handle);
813 } efi_loaded_image_t;
819 efi_time_t create_time;
820 efi_time_t last_access_time;
821 efi_time_t modification_time;
822 __aligned_u64 attribute;
823 efi_char16_t filename[1];
826 typedef struct efi_file_handle efi_file_handle_t;
828 struct efi_file_handle {
830 efi_status_t (__efiapi *open)(efi_file_handle_t *,
831 efi_file_handle_t **,
832 efi_char16_t *, u64, u64);
833 efi_status_t (__efiapi *close)(efi_file_handle_t *);
835 efi_status_t (__efiapi *read)(efi_file_handle_t *,
836 unsigned long *, void *);
840 efi_status_t (__efiapi *get_info)(efi_file_handle_t *,
841 efi_guid_t *, unsigned long *,
847 typedef struct efi_file_io_interface efi_file_io_interface_t;
849 struct efi_file_io_interface {
851 int (__efiapi *open_volume)(efi_file_io_interface_t *,
852 efi_file_handle_t **);
855 #define EFI_FILE_MODE_READ 0x0000000000000001
856 #define EFI_FILE_MODE_WRITE 0x0000000000000002
857 #define EFI_FILE_MODE_CREATE 0x8000000000000000
862 u64 memory_protection_attribute;
863 } efi_properties_table_t;
865 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000
866 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
868 #define EFI_INVALID_TABLE_ADDR (~0UL)
875 efi_memory_desc_t entry[0];
876 } efi_memory_attributes_table_t;
879 efi_guid_t signature_owner;
881 } efi_signature_data_t;
884 efi_guid_t signature_type;
885 u32 signature_list_size;
886 u32 signature_header_size;
888 u8 signature_header[];
889 /* efi_signature_data_t signatures[][] */
890 } efi_signature_list_t;
892 typedef u8 efi_sha256_hash_t[32];
895 efi_sha256_hash_t to_be_signed_hash;
896 efi_time_t time_of_revocation;
897 } efi_cert_x509_sha256_t;
900 * All runtime access to EFI goes through this structure:
903 efi_system_table_t *systab; /* EFI system table */
904 unsigned int runtime_version; /* Runtime services version */
905 unsigned long mps; /* MPS table */
906 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
907 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
908 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
909 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
910 unsigned long boot_info; /* boot info table */
911 unsigned long hcdp; /* HCDP table */
912 unsigned long uga; /* UGA table */
913 unsigned long fw_vendor; /* fw_vendor */
914 unsigned long runtime; /* runtime table */
915 unsigned long config_table; /* config tables */
916 unsigned long esrt; /* ESRT table */
917 unsigned long properties_table; /* properties table */
918 unsigned long mem_attr_table; /* memory attributes table */
919 unsigned long rng_seed; /* UEFI firmware random seed */
920 unsigned long tpm_log; /* TPM2 Event Log table */
921 unsigned long tpm_final_log; /* TPM2 Final Events Log table */
922 unsigned long mem_reserve; /* Linux EFI memreserve table */
923 efi_get_time_t *get_time;
924 efi_set_time_t *set_time;
925 efi_get_wakeup_time_t *get_wakeup_time;
926 efi_set_wakeup_time_t *set_wakeup_time;
927 efi_get_variable_t *get_variable;
928 efi_get_next_variable_t *get_next_variable;
929 efi_set_variable_t *set_variable;
930 efi_set_variable_t *set_variable_nonblocking;
931 efi_query_variable_info_t *query_variable_info;
932 efi_query_variable_info_t *query_variable_info_nonblocking;
933 efi_update_capsule_t *update_capsule;
934 efi_query_capsule_caps_t *query_capsule_caps;
935 efi_get_next_high_mono_count_t *get_next_high_mono_count;
936 efi_reset_system_t *reset_system;
937 struct efi_memory_map memmap;
941 extern struct mm_struct efi_mm;
944 efi_guidcmp (efi_guid_t left, efi_guid_t right)
946 return memcmp(&left, &right, sizeof (efi_guid_t));
950 efi_guid_to_str(efi_guid_t *guid, char *out)
952 sprintf(out, "%pUl", guid->b);
956 extern void efi_init (void);
957 extern void *efi_get_pal_addr (void);
958 extern void efi_map_pal_code (void);
959 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
960 extern void efi_gettimeofday (struct timespec64 *ts);
961 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
963 extern efi_status_t efi_query_variable_store(u32 attributes,
968 static inline efi_status_t efi_query_variable_store(u32 attributes,
975 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
977 extern int __init efi_memmap_alloc(unsigned int num_entries,
978 struct efi_memory_map_data *data);
979 extern void __efi_memmap_free(u64 phys, unsigned long size,
980 unsigned long flags);
981 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
982 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
983 extern void __init efi_memmap_unmap(void);
984 extern int __init efi_memmap_install(struct efi_memory_map_data *data);
985 extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
986 struct range *range);
987 extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
988 void *buf, struct efi_mem_range *mem);
990 extern int efi_config_init(efi_config_table_type_t *arch_tables);
991 #ifdef CONFIG_EFI_ESRT
992 extern void __init efi_esrt_init(void);
994 static inline void efi_esrt_init(void) { }
996 extern int efi_config_parse_tables(void *config_tables, int count, int sz,
997 efi_config_table_type_t *arch_tables);
998 extern u64 efi_get_iobase (void);
999 extern int efi_mem_type(unsigned long phys_addr);
1000 extern u64 efi_mem_attributes (unsigned long phys_addr);
1001 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
1002 extern int __init efi_uart_console_only (void);
1003 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
1004 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
1005 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
1006 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
1007 extern void efi_initialize_iomem_resources(struct resource *code_resource,
1008 struct resource *data_resource, struct resource *bss_resource);
1009 extern int efi_get_fdt_params(struct efi_fdt_params *params);
1010 extern struct kobject *efi_kobj;
1012 extern int efi_reboot_quirk_mode;
1013 extern bool efi_poweroff_required(void);
1015 #ifdef CONFIG_EFI_FAKE_MEMMAP
1016 extern void __init efi_fake_memmap(void);
1018 static inline void efi_fake_memmap(void) { }
1022 * efi_memattr_perm_setter - arch specific callback function passed into
1023 * efi_memattr_apply_permissions() that updates the
1024 * mapping permissions described by the second
1025 * argument in the page tables referred to by the
1028 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
1030 extern int efi_memattr_init(void);
1031 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
1032 efi_memattr_perm_setter fn);
1035 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
1036 * @map: the start of efi memmap
1037 * @desc_size: the size of space for each EFI memmap descriptor
1038 * @n: the index of efi memmap descriptor
1040 * EFI boot service provides the GetMemoryMap() function to get a copy of the
1041 * current memory map which is an array of memory descriptors, each of
1042 * which describes a contiguous block of memory. It also gets the size of the
1043 * map, and the size of each descriptor, etc.
1045 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
1046 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
1047 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
1048 * MUST use the returned size of the descriptor to find the start of each
1049 * efi_memory_memdesc_t in the memory map array. This should only be used
1050 * during bootup since for_each_efi_memory_desc_xxx() is available after the
1051 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
1053 #define efi_early_memdesc_ptr(map, desc_size, n) \
1054 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
1056 /* Iterate through an efi_memory_map */
1057 #define for_each_efi_memory_desc_in_map(m, md) \
1058 for ((md) = (m)->map; \
1059 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
1060 (md) = (void *)(md) + (m)->desc_size)
1063 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1064 * @md: the efi_memory_desc_t * iterator
1066 * Once the loop finishes @md must not be accessed.
1068 #define for_each_efi_memory_desc(md) \
1069 for_each_efi_memory_desc_in_map(&efi.memmap, md)
1072 * Format an EFI memory descriptor's type and attributes to a user-provided
1073 * character buffer, as per snprintf(), and return the buffer.
1075 char * __init efi_md_typeattr_format(char *buf, size_t size,
1076 const efi_memory_desc_t *md);
1079 typedef void (*efi_element_handler_t)(const char *source,
1080 const void *element_data,
1081 size_t element_size);
1082 extern int __init parse_efi_signature_list(
1084 const void *data, size_t size,
1085 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
1088 * efi_range_is_wc - check the WC bit on an address range
1089 * @start: starting kvirt address
1090 * @len: length of range
1092 * Consult the EFI memory map and make sure it's ok to set this range WC.
1093 * Returns true or false.
1095 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
1099 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
1100 unsigned long paddr = __pa(start + i);
1101 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
1104 /* The range checked out */
1108 #ifdef CONFIG_EFI_PCDP
1109 extern int __init efi_setup_pcdp_console(char *);
1113 * We play games with efi_enabled so that the compiler will, if
1114 * possible, remove EFI-related code altogether.
1116 #define EFI_BOOT 0 /* Were we booted from EFI? */
1117 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
1118 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
1119 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
1120 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
1121 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
1122 #define EFI_ARCH_1 7 /* First arch-specific bit */
1123 #define EFI_DBG 8 /* Print additional debug info at runtime */
1124 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
1125 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
1126 #define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */
1130 * Test whether the above EFI_* bits are enabled.
1132 static inline bool efi_enabled(int feature)
1134 return test_bit(feature, &efi.flags) != 0;
1136 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1138 bool __pure __efi_soft_reserve_enabled(void);
1140 static inline bool __pure efi_soft_reserve_enabled(void)
1142 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
1143 && __efi_soft_reserve_enabled();
1146 static inline bool efi_enabled(int feature)
1151 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1154 efi_capsule_pending(int *reset_type)
1159 static inline bool efi_soft_reserve_enabled(void)
1165 extern int efi_status_to_err(efi_status_t status);
1168 * Variable Attributes
1170 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
1171 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1172 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
1173 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1174 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1175 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1176 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
1178 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
1179 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1180 EFI_VARIABLE_RUNTIME_ACCESS | \
1181 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1182 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1183 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1184 EFI_VARIABLE_APPEND_WRITE)
1186 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1187 * not including trailing NUL
1189 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
1192 * The type of search to perform when calling boottime->locate_handle
1194 #define EFI_LOCATE_ALL_HANDLES 0
1195 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
1196 #define EFI_LOCATE_BY_PROTOCOL 2
1199 * EFI Device Path information
1201 #define EFI_DEV_HW 0x01
1202 #define EFI_DEV_PCI 1
1203 #define EFI_DEV_PCCARD 2
1204 #define EFI_DEV_MEM_MAPPED 3
1205 #define EFI_DEV_VENDOR 4
1206 #define EFI_DEV_CONTROLLER 5
1207 #define EFI_DEV_ACPI 0x02
1208 #define EFI_DEV_BASIC_ACPI 1
1209 #define EFI_DEV_EXPANDED_ACPI 2
1210 #define EFI_DEV_MSG 0x03
1211 #define EFI_DEV_MSG_ATAPI 1
1212 #define EFI_DEV_MSG_SCSI 2
1213 #define EFI_DEV_MSG_FC 3
1214 #define EFI_DEV_MSG_1394 4
1215 #define EFI_DEV_MSG_USB 5
1216 #define EFI_DEV_MSG_USB_CLASS 15
1217 #define EFI_DEV_MSG_I20 6
1218 #define EFI_DEV_MSG_MAC 11
1219 #define EFI_DEV_MSG_IPV4 12
1220 #define EFI_DEV_MSG_IPV6 13
1221 #define EFI_DEV_MSG_INFINIBAND 9
1222 #define EFI_DEV_MSG_UART 14
1223 #define EFI_DEV_MSG_VENDOR 10
1224 #define EFI_DEV_MEDIA 0x04
1225 #define EFI_DEV_MEDIA_HARD_DRIVE 1
1226 #define EFI_DEV_MEDIA_CDROM 2
1227 #define EFI_DEV_MEDIA_VENDOR 3
1228 #define EFI_DEV_MEDIA_FILE 4
1229 #define EFI_DEV_MEDIA_PROTOCOL 5
1230 #define EFI_DEV_BIOS_BOOT 0x05
1231 #define EFI_DEV_END_PATH 0x7F
1232 #define EFI_DEV_END_PATH2 0xFF
1233 #define EFI_DEV_END_INSTANCE 0x01
1234 #define EFI_DEV_END_ENTIRE 0xFF
1236 struct efi_generic_dev_path {
1240 } __attribute ((packed));
1242 struct efi_dev_path {
1243 u8 type; /* can be replaced with unnamed */
1244 u8 sub_type; /* struct efi_generic_dev_path; */
1245 u16 length; /* once we've moved to -std=c11 */
1256 } __attribute ((packed));
1258 #if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER)
1259 struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len);
1262 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1264 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1269 * EFI Variable support.
1271 * Different firmware drivers can expose their EFI-like variables using
1275 struct efivar_operations {
1276 efi_get_variable_t *get_variable;
1277 efi_get_next_variable_t *get_next_variable;
1278 efi_set_variable_t *set_variable;
1279 efi_set_variable_t *set_variable_nonblocking;
1280 efi_query_variable_store_t *query_variable_store;
1285 struct kobject *kobject;
1286 const struct efivar_operations *ops;
1290 * The maximum size of VariableName + Data = 1024
1291 * Therefore, it's reasonable to save that much
1292 * space in each part of the structure,
1293 * and we use a page for reading/writing.
1296 #define EFI_VAR_NAME_LEN 1024
1298 struct efi_variable {
1299 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1300 efi_guid_t VendorGuid;
1301 unsigned long DataSize;
1303 efi_status_t Status;
1305 } __attribute__((packed));
1307 struct efivar_entry {
1308 struct efi_variable var;
1309 struct list_head list;
1310 struct kobject kobj;
1315 union efi_simple_text_output_protocol {
1318 efi_status_t (__efiapi *output_string)(efi_simple_text_output_protocol_t *,
1329 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
1330 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
1331 #define PIXEL_BIT_MASK 2
1332 #define PIXEL_BLT_ONLY 3
1333 #define PIXEL_FORMAT_MAX 4
1340 } efi_pixel_bitmask_t;
1344 u32 horizontal_resolution;
1345 u32 vertical_resolution;
1347 efi_pixel_bitmask_t pixel_information;
1348 u32 pixels_per_scan_line;
1349 } efi_graphics_output_mode_info_t;
1351 typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t;
1353 union efi_graphics_output_protocol_mode {
1357 efi_graphics_output_mode_info_t *info;
1358 unsigned long size_of_info;
1359 efi_physical_addr_t frame_buffer_base;
1360 unsigned long frame_buffer_size;
1367 u64 frame_buffer_base;
1368 u32 frame_buffer_size;
1372 typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t;
1374 union efi_graphics_output_protocol {
1379 efi_graphics_output_protocol_mode_t *mode;
1389 extern struct list_head efivar_sysfs_list;
1392 efivar_unregister(struct efivar_entry *var)
1394 kobject_put(&var->kobj);
1397 int efivars_register(struct efivars *efivars,
1398 const struct efivar_operations *ops,
1399 struct kobject *kobject);
1400 int efivars_unregister(struct efivars *efivars);
1401 struct kobject *efivars_kobject(void);
1403 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1404 void *data, bool duplicates, struct list_head *head);
1406 int efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1407 int efivar_entry_remove(struct efivar_entry *entry);
1409 int __efivar_entry_delete(struct efivar_entry *entry);
1410 int efivar_entry_delete(struct efivar_entry *entry);
1412 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1413 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1414 unsigned long *size, void *data);
1415 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1416 unsigned long *size, void *data);
1417 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1418 unsigned long size, void *data, struct list_head *head);
1419 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1420 unsigned long *size, void *data, bool *set);
1421 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1422 bool block, unsigned long size, void *data);
1424 int efivar_entry_iter_begin(void);
1425 void efivar_entry_iter_end(void);
1427 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1428 struct list_head *head, void *data,
1429 struct efivar_entry **prev);
1430 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1431 struct list_head *head, void *data);
1433 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1434 struct list_head *head, bool remove);
1436 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1437 unsigned long data_size);
1438 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1441 extern struct work_struct efivar_work;
1442 void efivar_run_worker(void);
1444 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1445 int efivars_sysfs_init(void);
1447 #define EFIVARS_DATA_SIZE_MAX 1024
1449 #endif /* CONFIG_EFI_VARS */
1450 extern bool efi_capsule_pending(int *reset_type);
1452 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1453 size_t size, int *reset);
1455 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1456 phys_addr_t *pages);
1458 #ifdef CONFIG_EFI_RUNTIME_MAP
1459 int efi_runtime_map_init(struct kobject *);
1460 int efi_get_runtime_map_size(void);
1461 int efi_get_runtime_map_desc_size(void);
1462 int efi_runtime_map_copy(void *buf, size_t bufsz);
1464 static inline int efi_runtime_map_init(struct kobject *kobj)
1469 static inline int efi_get_runtime_map_size(void)
1474 static inline int efi_get_runtime_map_desc_size(void)
1479 static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1486 /* prototypes shared between arch specific and generic stub code */
1488 void efi_printk(char *str);
1490 void efi_free(unsigned long size, unsigned long addr);
1492 char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len);
1494 efi_status_t efi_get_memory_map(struct efi_boot_memmap *map);
1496 efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
1497 unsigned long *addr, unsigned long min);
1500 efi_status_t efi_low_alloc(unsigned long size, unsigned long align,
1501 unsigned long *addr)
1504 * Don't allocate at 0x0. It will confuse code that
1505 * checks pointers against NULL. Skip the first 8
1506 * bytes so we start at a nice even number.
1508 return efi_low_alloc_above(size, align, addr, 0x8);
1511 efi_status_t efi_high_alloc(unsigned long size, unsigned long align,
1512 unsigned long *addr, unsigned long max);
1514 efi_status_t efi_relocate_kernel(unsigned long *image_addr,
1515 unsigned long image_size,
1516 unsigned long alloc_size,
1517 unsigned long preferred_addr,
1518 unsigned long alignment,
1519 unsigned long min_addr);
1521 efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
1522 char *cmd_line, char *option_string,
1523 unsigned long max_addr,
1524 unsigned long *load_addr,
1525 unsigned long *load_size);
1527 efi_status_t efi_parse_options(char const *cmdline);
1529 efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,
1530 unsigned long size);
1533 extern bool efi_runtime_disabled(void);
1535 static inline bool efi_runtime_disabled(void) { return true; }
1538 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1539 extern unsigned long efi_call_virt_save_flags(void);
1541 enum efi_secureboot_mode {
1542 efi_secureboot_mode_unset,
1543 efi_secureboot_mode_unknown,
1544 efi_secureboot_mode_disabled,
1545 efi_secureboot_mode_enabled,
1547 enum efi_secureboot_mode efi_get_secureboot(void);
1549 #ifdef CONFIG_RESET_ATTACK_MITIGATION
1550 void efi_enable_reset_attack_mitigation(void);
1553 efi_enable_reset_attack_mitigation(void) { }
1556 efi_status_t efi_random_get_seed(void);
1558 void efi_retrieve_tpm2_eventlog(void);
1561 * Arch code can implement the following three template macros, avoiding
1562 * reptition for the void/non-void return cases of {__,}efi_call_virt():
1564 * * arch_efi_call_virt_setup()
1566 * Sets up the environment for the call (e.g. switching page tables,
1567 * allowing kernel-mode use of floating point, if required).
1569 * * arch_efi_call_virt()
1571 * Performs the call. The last expression in the macro must be the call
1572 * itself, allowing the logic to be shared by the void and non-void
1575 * * arch_efi_call_virt_teardown()
1577 * Restores the usual kernel environment once the call has returned.
1580 #define efi_call_virt_pointer(p, f, args...) \
1583 unsigned long __flags; \
1585 arch_efi_call_virt_setup(); \
1587 __flags = efi_call_virt_save_flags(); \
1588 __s = arch_efi_call_virt(p, f, args); \
1589 efi_call_virt_check_flags(__flags, __stringify(f)); \
1591 arch_efi_call_virt_teardown(); \
1596 #define __efi_call_virt_pointer(p, f, args...) \
1598 unsigned long __flags; \
1600 arch_efi_call_virt_setup(); \
1602 __flags = efi_call_virt_save_flags(); \
1603 arch_efi_call_virt(p, f, args); \
1604 efi_call_virt_check_flags(__flags, __stringify(f)); \
1606 arch_efi_call_virt_teardown(); \
1609 typedef efi_status_t (*efi_exit_boot_map_processing)(
1610 struct efi_boot_memmap *map,
1613 efi_status_t efi_exit_boot_services(void *handle,
1614 struct efi_boot_memmap *map,
1616 efi_exit_boot_map_processing priv_func);
1618 #define EFI_RANDOM_SEED_SIZE 64U
1620 struct linux_efi_random_seed {
1625 struct linux_efi_tpm_eventlog {
1627 u32 final_events_preboot_size;
1632 extern int efi_tpm_eventlog_init(void);
1634 struct efi_tcg2_final_events_table {
1639 extern int efi_tpm_final_log_size;
1641 extern unsigned long rci2_table_phys;
1644 * efi_runtime_service() function identifiers.
1645 * "NONE" is used by efi_recover_from_page_fault() to check if the page
1646 * fault happened while executing an efi runtime service.
1652 EFI_GET_WAKEUP_TIME,
1653 EFI_SET_WAKEUP_TIME,
1655 EFI_GET_NEXT_VARIABLE,
1657 EFI_QUERY_VARIABLE_INFO,
1658 EFI_GET_NEXT_HIGH_MONO_COUNT,
1661 EFI_QUERY_CAPSULE_CAPS,
1665 * efi_runtime_work: Details of EFI Runtime Service work
1666 * @arg<1-5>: EFI Runtime Service function arguments
1667 * @status: Status of executing EFI Runtime Service
1668 * @efi_rts_id: EFI Runtime Service function identifier
1669 * @efi_rts_comp: Struct used for handling completions
1671 struct efi_runtime_work {
1677 efi_status_t status;
1678 struct work_struct work;
1679 enum efi_rts_ids efi_rts_id;
1680 struct completion efi_rts_comp;
1683 extern struct efi_runtime_work efi_rts_work;
1685 /* Workqueue to queue EFI Runtime Services */
1686 extern struct workqueue_struct *efi_rts_wq;
1688 struct linux_efi_memreserve {
1689 int size; // allocated size of the array
1690 atomic_t count; // number of entries used
1691 phys_addr_t next; // pa of next struct instance
1698 #define EFI_MEMRESERVE_SIZE(count) (sizeof(struct linux_efi_memreserve) + \
1699 (count) * sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1701 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1702 / sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1704 void efi_pci_disable_bridge_busmaster(void);
1706 #endif /* _LINUX_EFI_H */