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 #define efi_get_handle_at(array, idx) \
52 (efi_is_native() ? (array)[idx] \
53 : (efi_handle_t)(unsigned long)((u32 *)(array))[idx])
55 #define efi_get_handle_num(size) \
56 ((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32)))
58 #define for_each_efi_handle(handle, array, size, i) \
60 i < efi_get_handle_num(size) && \
61 ((handle = efi_get_handle_at((array), i)) || true); \
65 * The UEFI spec and EDK2 reference implementation both define EFI_GUID as
66 * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment
67 * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM),
68 * this means that firmware services invoked by the kernel may assume that
69 * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that
70 * do not tolerate misalignment. So let's set the minimum alignment to 32 bits.
72 * Note that the UEFI spec as well as some comments in the EDK2 code base
73 * suggest that EFI_GUID should be 64-bit aligned, but this appears to be
74 * a mistake, given that no code seems to exist that actually enforces that
77 typedef guid_t efi_guid_t __aligned(__alignof__(u32));
79 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
80 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
83 * Generic EFI table header
94 * Memory map descriptor:
98 #define EFI_RESERVED_TYPE 0
99 #define EFI_LOADER_CODE 1
100 #define EFI_LOADER_DATA 2
101 #define EFI_BOOT_SERVICES_CODE 3
102 #define EFI_BOOT_SERVICES_DATA 4
103 #define EFI_RUNTIME_SERVICES_CODE 5
104 #define EFI_RUNTIME_SERVICES_DATA 6
105 #define EFI_CONVENTIONAL_MEMORY 7
106 #define EFI_UNUSABLE_MEMORY 8
107 #define EFI_ACPI_RECLAIM_MEMORY 9
108 #define EFI_ACPI_MEMORY_NVS 10
109 #define EFI_MEMORY_MAPPED_IO 11
110 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
111 #define EFI_PAL_CODE 13
112 #define EFI_PERSISTENT_MEMORY 14
113 #define EFI_MAX_MEMORY_TYPE 15
115 /* Attribute values: */
116 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
117 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
118 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
119 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
120 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
121 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
122 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
123 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
124 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
125 #define EFI_MEMORY_MORE_RELIABLE \
126 ((u64)0x0000000000010000ULL) /* higher reliability */
127 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
128 #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* soft reserved */
129 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
130 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
132 #define EFI_PAGE_SHIFT 12
133 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
134 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
150 } efi_capsule_header_t;
152 struct efi_boot_memmap {
153 efi_memory_desc_t **map;
154 unsigned long *map_size;
155 unsigned long *desc_size;
157 unsigned long *key_ptr;
158 unsigned long *buff_size;
164 #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
165 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
166 #define EFI_CAPSULE_INITIATE_RESET 0x00040000
168 struct capsule_info {
169 efi_capsule_header_t header;
170 efi_capsule_header_t *capsule;
177 size_t page_bytes_remain;
180 int __efi_capsule_setup_info(struct capsule_info *cap_info);
183 * Allocation types for calls to boottime->allocate_pages.
185 #define EFI_ALLOCATE_ANY_PAGES 0
186 #define EFI_ALLOCATE_MAX_ADDRESS 1
187 #define EFI_ALLOCATE_ADDRESS 2
188 #define EFI_MAX_ALLOCATE_TYPE 3
190 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
193 * Types and defines for Time Services
195 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
196 #define EFI_TIME_IN_DAYLIGHT 0x2
197 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
234 u32 install_protocol_interface;
235 u32 reinstall_protocol_interface;
236 u32 uninstall_protocol_interface;
239 u32 register_protocol_notify;
241 u32 locate_device_path;
242 u32 install_configuration_table;
247 u32 exit_boot_services;
248 u32 get_next_monotonic_count;
250 u32 set_watchdog_timer;
251 u32 connect_controller;
252 u32 disconnect_controller;
255 u32 open_protocol_information;
256 u32 protocols_per_handle;
257 u32 locate_handle_buffer;
259 u32 install_multiple_protocol_interfaces;
260 u32 uninstall_multiple_protocol_interfaces;
265 } __packed efi_boot_services_32_t;
268 * EFI Boot Services table
275 efi_status_t (*allocate_pages)(int, int, unsigned long,
276 efi_physical_addr_t *);
277 efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
278 efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
279 unsigned long *, u32 *);
280 efi_status_t (*allocate_pool)(int, unsigned long, void **);
281 efi_status_t (*free_pool)(void *);
284 void *wait_for_event;
288 void *install_protocol_interface;
289 void *reinstall_protocol_interface;
290 void *uninstall_protocol_interface;
291 efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
293 void *register_protocol_notify;
294 efi_status_t (*locate_handle)(int, efi_guid_t *, void *,
295 unsigned long *, efi_handle_t *);
296 void *locate_device_path;
297 efi_status_t (*install_configuration_table)(efi_guid_t *, void *);
302 efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
303 void *get_next_monotonic_count;
305 void *set_watchdog_timer;
306 void *connect_controller;
307 void *disconnect_controller;
309 void *close_protocol;
310 void *open_protocol_information;
311 void *protocols_per_handle;
312 void *locate_handle_buffer;
313 efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
314 void *install_multiple_protocol_interfaces;
315 void *uninstall_multiple_protocol_interfaces;
316 void *calculate_crc32;
319 void *create_event_ex;
321 efi_boot_services_32_t mixed_mode;
322 } efi_boot_services_t;
329 EfiPciIoWidthFifoUint8,
330 EfiPciIoWidthFifoUint16,
331 EfiPciIoWidthFifoUint32,
332 EfiPciIoWidthFifoUint64,
333 EfiPciIoWidthFillUint8,
334 EfiPciIoWidthFillUint16,
335 EfiPciIoWidthFillUint32,
336 EfiPciIoWidthFillUint64,
338 } EFI_PCI_IO_PROTOCOL_WIDTH;
341 EfiPciIoAttributeOperationGet,
342 EfiPciIoAttributeOperationSet,
343 EfiPciIoAttributeOperationEnable,
344 EfiPciIoAttributeOperationDisable,
345 EfiPciIoAttributeOperationSupported,
346 EfiPciIoAttributeOperationMaximum
347 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
352 } efi_pci_io_protocol_access_32_t;
354 typedef union efi_pci_io_protocol efi_pci_io_protocol_t;
357 efi_status_t (*efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *,
358 EFI_PCI_IO_PROTOCOL_WIDTH,
359 u32 offset, unsigned long count,
365 } efi_pci_io_protocol_access_t;
368 efi_pci_io_protocol_cfg_t read;
369 efi_pci_io_protocol_cfg_t write;
370 } efi_pci_io_protocol_config_access_t;
372 union efi_pci_io_protocol {
376 efi_pci_io_protocol_access_t mem;
377 efi_pci_io_protocol_access_t io;
378 efi_pci_io_protocol_config_access_t pci;
382 void *allocate_buffer;
385 efi_status_t (*get_location)(efi_pci_io_protocol_t *,
386 unsigned long *segment_nr,
387 unsigned long *bus_nr,
388 unsigned long *device_nr,
389 unsigned long *function_nr);
391 void *get_bar_attributes;
392 void *set_bar_attributes;
399 efi_pci_io_protocol_access_32_t mem;
400 efi_pci_io_protocol_access_32_t io;
401 efi_pci_io_protocol_access_32_t pci;
410 u32 get_bar_attributes;
411 u32 set_bar_attributes;
417 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
418 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
419 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
420 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
421 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
422 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
423 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
424 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
425 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
426 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
427 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
428 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
429 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
430 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
431 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
432 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
433 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
434 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
435 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
439 typedef union apple_properties_protocol apple_properties_protocol_t;
441 union apple_properties_protocol {
443 unsigned long version;
444 efi_status_t (*get)(apple_properties_protocol_t *,
445 struct efi_dev_path *, efi_char16_t *,
447 efi_status_t (*set)(apple_properties_protocol_t *,
448 struct efi_dev_path *, efi_char16_t *,
450 efi_status_t (*del)(apple_properties_protocol_t *,
451 struct efi_dev_path *, efi_char16_t *);
452 efi_status_t (*get_all)(apple_properties_protocol_t *,
453 void *buffer, u32 *);
464 typedef u32 efi_tcg2_event_log_format;
466 typedef union efi_tcg2_protocol efi_tcg2_protocol_t;
468 union efi_tcg2_protocol {
470 void *get_capability;
471 efi_status_t (*get_event_log)(efi_handle_t,
472 efi_tcg2_event_log_format,
473 efi_physical_addr_t *,
474 efi_physical_addr_t *,
476 void *hash_log_extend_event;
477 void *submit_command;
478 void *get_active_pcr_banks;
479 void *set_active_pcr_banks;
480 void *get_result_of_set_active_pcr_banks;
485 u32 hash_log_extend_event;
487 u32 get_active_pcr_banks;
488 u32 set_active_pcr_banks;
489 u32 get_result_of_set_active_pcr_banks;
494 * Types and defines for EFI ResetSystem
496 #define EFI_RESET_COLD 0
497 #define EFI_RESET_WARM 1
498 #define EFI_RESET_SHUTDOWN 2
501 * EFI Runtime Services table
503 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
504 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
512 u32 set_virtual_address_map;
515 u32 get_next_variable;
517 u32 get_next_high_mono_count;
520 u32 query_capsule_caps;
521 u32 query_variable_info;
522 } efi_runtime_services_32_t;
530 u64 set_virtual_address_map;
533 u64 get_next_variable;
535 u64 get_next_high_mono_count;
538 u64 query_capsule_caps;
539 u64 query_variable_info;
540 } efi_runtime_services_64_t;
542 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
543 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
544 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
546 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
547 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
548 unsigned long *data_size, void *data);
549 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
551 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
552 u32 attr, unsigned long data_size,
554 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
555 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
556 unsigned long data_size, efi_char16_t *data);
557 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
558 unsigned long descriptor_size,
559 u32 descriptor_version,
560 efi_memory_desc_t *virtual_map);
561 typedef efi_status_t efi_query_variable_info_t(u32 attr,
563 u64 *remaining_space,
564 u64 *max_variable_size);
565 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
567 unsigned long sg_list);
568 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
572 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
579 efi_get_time_t *get_time;
580 efi_set_time_t *set_time;
581 efi_get_wakeup_time_t *get_wakeup_time;
582 efi_set_wakeup_time_t *set_wakeup_time;
583 efi_set_virtual_address_map_t *set_virtual_address_map;
584 void *convert_pointer;
585 efi_get_variable_t *get_variable;
586 efi_get_next_variable_t *get_next_variable;
587 efi_set_variable_t *set_variable;
588 efi_get_next_high_mono_count_t *get_next_high_mono_count;
589 efi_reset_system_t *reset_system;
590 efi_update_capsule_t *update_capsule;
591 efi_query_capsule_caps_t *query_capsule_caps;
592 efi_query_variable_info_t *query_variable_info;
594 efi_runtime_services_32_t mixed_mode;
595 } efi_runtime_services_t;
597 void efi_native_runtime_setup(void);
600 * EFI Configuration Table and GUID definitions
602 * These are all defined in a single line to make them easier to
603 * grep for and to see them at a glance - while still having a
604 * similar structure to the definitions in the spec.
606 * Here's how they are structured:
608 * GUID: 12345678-1234-1234-1234-123456789012
610 * #define EFI_SOME_PROTOCOL_GUID \
611 * {0x12345678,0x1234,0x1234,\
612 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
614 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
615 * ^ tabs ^extra space
617 * Note that the 'extra space' separates the values at the same place
618 * where the UEFI SPEC breaks the line.
620 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
621 #define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
622 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
623 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
624 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
625 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
626 #define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
627 #define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
628 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
629 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
630 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
631 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
632 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
633 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
634 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
635 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
636 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
637 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
638 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
639 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
640 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
641 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
642 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
643 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
644 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
645 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
646 #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
648 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
649 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
651 #define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
652 #define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
653 #define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
656 * This GUID is used to pass to the kernel proper the struct screen_info
657 * structure that was populated by the stub based on the GOP protocol instance
658 * associated with ConOut
660 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
661 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
662 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
663 #define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
664 #define LINUX_EFI_TPM_FINAL_LOG_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)
665 #define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
668 #define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
673 } efi_config_table_64_t;
678 } efi_config_table_32_t;
685 efi_config_table_32_t mixed_mode;
686 } efi_config_table_t;
692 } efi_config_table_type_t;
694 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
696 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
697 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
698 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
699 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
700 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
701 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
705 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
719 } efi_system_table_64_t;
723 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
735 } efi_system_table_32_t;
737 typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
742 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
744 unsigned long con_in_handle;
745 unsigned long con_in;
746 unsigned long con_out_handle;
747 efi_simple_text_output_protocol_t *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;
755 efi_system_table_32_t mixed_mode;
756 } efi_system_table_t;
759 * Architecture independent structure for describing a memory map for the
760 * benefit of efi_memmap_init_early(), saving us the need to pass four
763 struct efi_memory_map_data {
764 phys_addr_t phys_map;
766 unsigned long desc_version;
767 unsigned long desc_size;
770 struct efi_memory_map {
771 phys_addr_t phys_map;
775 unsigned long desc_version;
776 unsigned long desc_size;
780 struct efi_mem_range {
785 struct efi_fdt_params {
793 typedef union efi_loaded_image efi_loaded_image_t;
795 union efi_loaded_image {
798 efi_handle_t parent_handle;
799 efi_system_table_t *system_table;
800 efi_handle_t device_handle;
803 u32 load_options_size;
806 __aligned_u64 image_size;
807 unsigned int image_code_type;
808 unsigned int image_data_type;
809 efi_status_t (*unload)(efi_handle_t image_handle);
818 u32 load_options_size;
821 __aligned_u64 image_size;
822 unsigned int image_code_type;
823 unsigned int image_data_type;
832 efi_time_t create_time;
833 efi_time_t last_access_time;
834 efi_time_t modification_time;
835 __aligned_u64 attribute;
836 efi_char16_t filename[1];
839 typedef union efi_file_handle efi_file_handle_t;
841 union efi_file_handle {
844 efi_status_t (*open)(efi_file_handle_t *,
845 efi_file_handle_t **,
846 efi_char16_t *, u64, u64);
847 efi_status_t (*close)(efi_file_handle_t *);
849 efi_status_t (*read)(efi_file_handle_t *, unsigned long *,
854 efi_status_t (*get_info)(efi_file_handle_t *, efi_guid_t *,
855 unsigned long *, void *);
874 typedef union efi_file_io_interface efi_file_io_interface_t;
876 union efi_file_io_interface {
879 int (*open_volume)(efi_file_io_interface_t *,
880 efi_file_handle_t **);
888 #define EFI_FILE_MODE_READ 0x0000000000000001
889 #define EFI_FILE_MODE_WRITE 0x0000000000000002
890 #define EFI_FILE_MODE_CREATE 0x8000000000000000
895 u64 memory_protection_attribute;
896 } efi_properties_table_t;
898 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000
899 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
901 #define EFI_INVALID_TABLE_ADDR (~0UL)
908 efi_memory_desc_t entry[0];
909 } efi_memory_attributes_table_t;
912 efi_guid_t signature_owner;
914 } efi_signature_data_t;
917 efi_guid_t signature_type;
918 u32 signature_list_size;
919 u32 signature_header_size;
921 u8 signature_header[];
922 /* efi_signature_data_t signatures[][] */
923 } efi_signature_list_t;
925 typedef u8 efi_sha256_hash_t[32];
928 efi_sha256_hash_t to_be_signed_hash;
929 efi_time_t time_of_revocation;
930 } efi_cert_x509_sha256_t;
933 * All runtime access to EFI goes through this structure:
936 efi_system_table_t *systab; /* EFI system table */
937 unsigned int runtime_version; /* Runtime services version */
938 unsigned long mps; /* MPS table */
939 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
940 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
941 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
942 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
943 unsigned long boot_info; /* boot info table */
944 unsigned long hcdp; /* HCDP table */
945 unsigned long uga; /* UGA table */
946 unsigned long fw_vendor; /* fw_vendor */
947 unsigned long runtime; /* runtime table */
948 unsigned long config_table; /* config tables */
949 unsigned long esrt; /* ESRT table */
950 unsigned long properties_table; /* properties table */
951 unsigned long mem_attr_table; /* memory attributes table */
952 unsigned long rng_seed; /* UEFI firmware random seed */
953 unsigned long tpm_log; /* TPM2 Event Log table */
954 unsigned long tpm_final_log; /* TPM2 Final Events Log table */
955 unsigned long mem_reserve; /* Linux EFI memreserve table */
956 efi_get_time_t *get_time;
957 efi_set_time_t *set_time;
958 efi_get_wakeup_time_t *get_wakeup_time;
959 efi_set_wakeup_time_t *set_wakeup_time;
960 efi_get_variable_t *get_variable;
961 efi_get_next_variable_t *get_next_variable;
962 efi_set_variable_t *set_variable;
963 efi_set_variable_t *set_variable_nonblocking;
964 efi_query_variable_info_t *query_variable_info;
965 efi_query_variable_info_t *query_variable_info_nonblocking;
966 efi_update_capsule_t *update_capsule;
967 efi_query_capsule_caps_t *query_capsule_caps;
968 efi_get_next_high_mono_count_t *get_next_high_mono_count;
969 efi_reset_system_t *reset_system;
970 efi_set_virtual_address_map_t *set_virtual_address_map;
971 struct efi_memory_map memmap;
975 extern struct mm_struct efi_mm;
978 efi_guidcmp (efi_guid_t left, efi_guid_t right)
980 return memcmp(&left, &right, sizeof (efi_guid_t));
984 efi_guid_to_str(efi_guid_t *guid, char *out)
986 sprintf(out, "%pUl", guid->b);
990 extern void efi_init (void);
991 extern void *efi_get_pal_addr (void);
992 extern void efi_map_pal_code (void);
993 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
994 extern void efi_gettimeofday (struct timespec64 *ts);
995 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
997 extern efi_status_t efi_query_variable_store(u32 attributes,
1002 static inline efi_status_t efi_query_variable_store(u32 attributes,
1009 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
1011 extern phys_addr_t __init efi_memmap_alloc(unsigned int num_entries);
1012 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
1013 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
1014 extern void __init efi_memmap_unmap(void);
1015 extern int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map);
1016 extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
1017 struct range *range);
1018 extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
1019 void *buf, struct efi_mem_range *mem);
1021 extern int efi_config_init(efi_config_table_type_t *arch_tables);
1022 #ifdef CONFIG_EFI_ESRT
1023 extern void __init efi_esrt_init(void);
1025 static inline void efi_esrt_init(void) { }
1027 extern int efi_config_parse_tables(void *config_tables, int count, int sz,
1028 efi_config_table_type_t *arch_tables);
1029 extern u64 efi_get_iobase (void);
1030 extern int efi_mem_type(unsigned long phys_addr);
1031 extern u64 efi_mem_attributes (unsigned long phys_addr);
1032 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
1033 extern int __init efi_uart_console_only (void);
1034 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
1035 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
1036 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
1037 extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
1038 extern void efi_initialize_iomem_resources(struct resource *code_resource,
1039 struct resource *data_resource, struct resource *bss_resource);
1040 extern int efi_get_fdt_params(struct efi_fdt_params *params);
1041 extern struct kobject *efi_kobj;
1043 extern int efi_reboot_quirk_mode;
1044 extern bool efi_poweroff_required(void);
1046 #ifdef CONFIG_EFI_FAKE_MEMMAP
1047 extern void __init efi_fake_memmap(void);
1049 static inline void efi_fake_memmap(void) { }
1053 * efi_memattr_perm_setter - arch specific callback function passed into
1054 * efi_memattr_apply_permissions() that updates the
1055 * mapping permissions described by the second
1056 * argument in the page tables referred to by the
1059 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
1061 extern int efi_memattr_init(void);
1062 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
1063 efi_memattr_perm_setter fn);
1066 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
1067 * @map: the start of efi memmap
1068 * @desc_size: the size of space for each EFI memmap descriptor
1069 * @n: the index of efi memmap descriptor
1071 * EFI boot service provides the GetMemoryMap() function to get a copy of the
1072 * current memory map which is an array of memory descriptors, each of
1073 * which describes a contiguous block of memory. It also gets the size of the
1074 * map, and the size of each descriptor, etc.
1076 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
1077 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
1078 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
1079 * MUST use the returned size of the descriptor to find the start of each
1080 * efi_memory_memdesc_t in the memory map array. This should only be used
1081 * during bootup since for_each_efi_memory_desc_xxx() is available after the
1082 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
1084 #define efi_early_memdesc_ptr(map, desc_size, n) \
1085 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
1087 /* Iterate through an efi_memory_map */
1088 #define for_each_efi_memory_desc_in_map(m, md) \
1089 for ((md) = (m)->map; \
1090 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
1091 (md) = (void *)(md) + (m)->desc_size)
1094 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1095 * @md: the efi_memory_desc_t * iterator
1097 * Once the loop finishes @md must not be accessed.
1099 #define for_each_efi_memory_desc(md) \
1100 for_each_efi_memory_desc_in_map(&efi.memmap, md)
1103 * Format an EFI memory descriptor's type and attributes to a user-provided
1104 * character buffer, as per snprintf(), and return the buffer.
1106 char * __init efi_md_typeattr_format(char *buf, size_t size,
1107 const efi_memory_desc_t *md);
1110 typedef void (*efi_element_handler_t)(const char *source,
1111 const void *element_data,
1112 size_t element_size);
1113 extern int __init parse_efi_signature_list(
1115 const void *data, size_t size,
1116 efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
1119 * efi_range_is_wc - check the WC bit on an address range
1120 * @start: starting kvirt address
1121 * @len: length of range
1123 * Consult the EFI memory map and make sure it's ok to set this range WC.
1124 * Returns true or false.
1126 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
1130 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
1131 unsigned long paddr = __pa(start + i);
1132 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
1135 /* The range checked out */
1139 #ifdef CONFIG_EFI_PCDP
1140 extern int __init efi_setup_pcdp_console(char *);
1144 * We play games with efi_enabled so that the compiler will, if
1145 * possible, remove EFI-related code altogether.
1147 #define EFI_BOOT 0 /* Were we booted from EFI? */
1148 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
1149 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
1150 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
1151 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
1152 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
1153 #define EFI_ARCH_1 7 /* First arch-specific bit */
1154 #define EFI_DBG 8 /* Print additional debug info at runtime */
1155 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
1156 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
1157 #define EFI_MEM_NO_SOFT_RESERVE 11 /* Is the kernel configured to ignore soft reservations? */
1161 * Test whether the above EFI_* bits are enabled.
1163 static inline bool efi_enabled(int feature)
1165 return test_bit(feature, &efi.flags) != 0;
1167 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1169 bool __pure __efi_soft_reserve_enabled(void);
1171 static inline bool __pure efi_soft_reserve_enabled(void)
1173 return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE)
1174 && __efi_soft_reserve_enabled();
1177 static inline bool efi_enabled(int feature)
1182 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1185 efi_capsule_pending(int *reset_type)
1190 static inline bool efi_soft_reserve_enabled(void)
1196 extern int efi_status_to_err(efi_status_t status);
1199 * Variable Attributes
1201 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
1202 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1203 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
1204 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1205 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1206 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1207 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
1209 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
1210 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1211 EFI_VARIABLE_RUNTIME_ACCESS | \
1212 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1213 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1214 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1215 EFI_VARIABLE_APPEND_WRITE)
1217 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1218 * not including trailing NUL
1220 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
1223 * The type of search to perform when calling boottime->locate_handle
1225 #define EFI_LOCATE_ALL_HANDLES 0
1226 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
1227 #define EFI_LOCATE_BY_PROTOCOL 2
1230 * EFI Device Path information
1232 #define EFI_DEV_HW 0x01
1233 #define EFI_DEV_PCI 1
1234 #define EFI_DEV_PCCARD 2
1235 #define EFI_DEV_MEM_MAPPED 3
1236 #define EFI_DEV_VENDOR 4
1237 #define EFI_DEV_CONTROLLER 5
1238 #define EFI_DEV_ACPI 0x02
1239 #define EFI_DEV_BASIC_ACPI 1
1240 #define EFI_DEV_EXPANDED_ACPI 2
1241 #define EFI_DEV_MSG 0x03
1242 #define EFI_DEV_MSG_ATAPI 1
1243 #define EFI_DEV_MSG_SCSI 2
1244 #define EFI_DEV_MSG_FC 3
1245 #define EFI_DEV_MSG_1394 4
1246 #define EFI_DEV_MSG_USB 5
1247 #define EFI_DEV_MSG_USB_CLASS 15
1248 #define EFI_DEV_MSG_I20 6
1249 #define EFI_DEV_MSG_MAC 11
1250 #define EFI_DEV_MSG_IPV4 12
1251 #define EFI_DEV_MSG_IPV6 13
1252 #define EFI_DEV_MSG_INFINIBAND 9
1253 #define EFI_DEV_MSG_UART 14
1254 #define EFI_DEV_MSG_VENDOR 10
1255 #define EFI_DEV_MEDIA 0x04
1256 #define EFI_DEV_MEDIA_HARD_DRIVE 1
1257 #define EFI_DEV_MEDIA_CDROM 2
1258 #define EFI_DEV_MEDIA_VENDOR 3
1259 #define EFI_DEV_MEDIA_FILE 4
1260 #define EFI_DEV_MEDIA_PROTOCOL 5
1261 #define EFI_DEV_BIOS_BOOT 0x05
1262 #define EFI_DEV_END_PATH 0x7F
1263 #define EFI_DEV_END_PATH2 0xFF
1264 #define EFI_DEV_END_INSTANCE 0x01
1265 #define EFI_DEV_END_ENTIRE 0xFF
1267 struct efi_generic_dev_path {
1271 } __attribute ((packed));
1273 struct efi_dev_path {
1274 u8 type; /* can be replaced with unnamed */
1275 u8 sub_type; /* struct efi_generic_dev_path; */
1276 u16 length; /* once we've moved to -std=c11 */
1287 } __attribute ((packed));
1289 #if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER)
1290 struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len);
1293 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1295 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1300 * EFI Variable support.
1302 * Different firmware drivers can expose their EFI-like variables using
1306 struct efivar_operations {
1307 efi_get_variable_t *get_variable;
1308 efi_get_next_variable_t *get_next_variable;
1309 efi_set_variable_t *set_variable;
1310 efi_set_variable_t *set_variable_nonblocking;
1311 efi_query_variable_store_t *query_variable_store;
1316 struct kobject *kobject;
1317 const struct efivar_operations *ops;
1321 * The maximum size of VariableName + Data = 1024
1322 * Therefore, it's reasonable to save that much
1323 * space in each part of the structure,
1324 * and we use a page for reading/writing.
1327 #define EFI_VAR_NAME_LEN 1024
1329 struct efi_variable {
1330 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1331 efi_guid_t VendorGuid;
1332 unsigned long DataSize;
1334 efi_status_t Status;
1336 } __attribute__((packed));
1338 struct efivar_entry {
1339 struct efi_variable var;
1340 struct list_head list;
1341 struct kobject kobj;
1346 union efi_simple_text_output_protocol {
1349 efi_status_t (*output_string)(efi_simple_text_output_protocol_t *,
1360 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
1361 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
1362 #define PIXEL_BIT_MASK 2
1363 #define PIXEL_BLT_ONLY 3
1364 #define PIXEL_FORMAT_MAX 4
1371 } efi_pixel_bitmask_t;
1375 u32 horizontal_resolution;
1376 u32 vertical_resolution;
1378 efi_pixel_bitmask_t pixel_information;
1379 u32 pixels_per_scan_line;
1380 } efi_graphics_output_mode_info_t;
1382 typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t;
1384 union efi_graphics_output_protocol_mode {
1388 efi_graphics_output_mode_info_t *info;
1389 unsigned long size_of_info;
1390 efi_physical_addr_t frame_buffer_base;
1391 unsigned long frame_buffer_size;
1398 u64 frame_buffer_base;
1399 u32 frame_buffer_size;
1403 typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t;
1405 union efi_graphics_output_protocol {
1410 efi_graphics_output_protocol_mode_t *mode;
1420 extern struct list_head efivar_sysfs_list;
1423 efivar_unregister(struct efivar_entry *var)
1425 kobject_put(&var->kobj);
1428 int efivars_register(struct efivars *efivars,
1429 const struct efivar_operations *ops,
1430 struct kobject *kobject);
1431 int efivars_unregister(struct efivars *efivars);
1432 struct kobject *efivars_kobject(void);
1434 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
1435 void *data, bool duplicates, struct list_head *head);
1437 int efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
1438 int efivar_entry_remove(struct efivar_entry *entry);
1440 int __efivar_entry_delete(struct efivar_entry *entry);
1441 int efivar_entry_delete(struct efivar_entry *entry);
1443 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
1444 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1445 unsigned long *size, void *data);
1446 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
1447 unsigned long *size, void *data);
1448 int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
1449 unsigned long size, void *data, struct list_head *head);
1450 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
1451 unsigned long *size, void *data, bool *set);
1452 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
1453 bool block, unsigned long size, void *data);
1455 int efivar_entry_iter_begin(void);
1456 void efivar_entry_iter_end(void);
1458 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1459 struct list_head *head, void *data,
1460 struct efivar_entry **prev);
1461 int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
1462 struct list_head *head, void *data);
1464 struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
1465 struct list_head *head, bool remove);
1467 bool efivar_validate(efi_guid_t vendor, efi_char16_t *var_name, u8 *data,
1468 unsigned long data_size);
1469 bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
1472 extern struct work_struct efivar_work;
1473 void efivar_run_worker(void);
1475 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1476 int efivars_sysfs_init(void);
1478 #define EFIVARS_DATA_SIZE_MAX 1024
1480 #endif /* CONFIG_EFI_VARS */
1481 extern bool efi_capsule_pending(int *reset_type);
1483 extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
1484 size_t size, int *reset);
1486 extern int efi_capsule_update(efi_capsule_header_t *capsule,
1487 phys_addr_t *pages);
1489 #ifdef CONFIG_EFI_RUNTIME_MAP
1490 int efi_runtime_map_init(struct kobject *);
1491 int efi_get_runtime_map_size(void);
1492 int efi_get_runtime_map_desc_size(void);
1493 int efi_runtime_map_copy(void *buf, size_t bufsz);
1495 static inline int efi_runtime_map_init(struct kobject *kobj)
1500 static inline int efi_get_runtime_map_size(void)
1505 static inline int efi_get_runtime_map_desc_size(void)
1510 static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
1517 /* prototypes shared between arch specific and generic stub code */
1519 void efi_printk(efi_system_table_t *sys_table_arg, char *str);
1521 void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
1522 unsigned long addr);
1524 char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
1525 efi_loaded_image_t *image, int *cmd_line_len);
1527 efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
1528 struct efi_boot_memmap *map);
1530 efi_status_t efi_low_alloc_above(efi_system_table_t *sys_table_arg,
1531 unsigned long size, unsigned long align,
1532 unsigned long *addr, unsigned long min);
1535 efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
1536 unsigned long size, unsigned long align,
1537 unsigned long *addr)
1540 * Don't allocate at 0x0. It will confuse code that
1541 * checks pointers against NULL. Skip the first 8
1542 * bytes so we start at a nice even number.
1544 return efi_low_alloc_above(sys_table_arg, size, align, addr, 0x8);
1547 efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
1548 unsigned long size, unsigned long align,
1549 unsigned long *addr, unsigned long max);
1551 efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
1552 unsigned long *image_addr,
1553 unsigned long image_size,
1554 unsigned long alloc_size,
1555 unsigned long preferred_addr,
1556 unsigned long alignment,
1557 unsigned long min_addr);
1559 efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
1560 efi_loaded_image_t *image,
1561 char *cmd_line, char *option_string,
1562 unsigned long max_addr,
1563 unsigned long *load_addr,
1564 unsigned long *load_size);
1566 efi_status_t efi_parse_options(char const *cmdline);
1568 efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
1569 struct screen_info *si, efi_guid_t *proto,
1570 unsigned long size);
1573 extern bool efi_runtime_disabled(void);
1575 static inline bool efi_runtime_disabled(void) { return true; }
1578 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1579 extern unsigned long efi_call_virt_save_flags(void);
1581 enum efi_secureboot_mode {
1582 efi_secureboot_mode_unset,
1583 efi_secureboot_mode_unknown,
1584 efi_secureboot_mode_disabled,
1585 efi_secureboot_mode_enabled,
1587 enum efi_secureboot_mode efi_get_secureboot(efi_system_table_t *sys_table);
1589 #ifdef CONFIG_RESET_ATTACK_MITIGATION
1590 void efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg);
1593 efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg) { }
1596 efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg);
1598 void efi_retrieve_tpm2_eventlog(efi_system_table_t *sys_table);
1601 * Arch code can implement the following three template macros, avoiding
1602 * reptition for the void/non-void return cases of {__,}efi_call_virt():
1604 * * arch_efi_call_virt_setup()
1606 * Sets up the environment for the call (e.g. switching page tables,
1607 * allowing kernel-mode use of floating point, if required).
1609 * * arch_efi_call_virt()
1611 * Performs the call. The last expression in the macro must be the call
1612 * itself, allowing the logic to be shared by the void and non-void
1615 * * arch_efi_call_virt_teardown()
1617 * Restores the usual kernel environment once the call has returned.
1620 #define efi_call_virt_pointer(p, f, args...) \
1623 unsigned long __flags; \
1625 arch_efi_call_virt_setup(); \
1627 __flags = efi_call_virt_save_flags(); \
1628 __s = arch_efi_call_virt(p, f, args); \
1629 efi_call_virt_check_flags(__flags, __stringify(f)); \
1631 arch_efi_call_virt_teardown(); \
1636 #define __efi_call_virt_pointer(p, f, args...) \
1638 unsigned long __flags; \
1640 arch_efi_call_virt_setup(); \
1642 __flags = efi_call_virt_save_flags(); \
1643 arch_efi_call_virt(p, f, args); \
1644 efi_call_virt_check_flags(__flags, __stringify(f)); \
1646 arch_efi_call_virt_teardown(); \
1649 typedef efi_status_t (*efi_exit_boot_map_processing)(
1650 efi_system_table_t *sys_table_arg,
1651 struct efi_boot_memmap *map,
1654 efi_status_t efi_exit_boot_services(efi_system_table_t *sys_table,
1656 struct efi_boot_memmap *map,
1658 efi_exit_boot_map_processing priv_func);
1660 #define EFI_RANDOM_SEED_SIZE 64U
1662 struct linux_efi_random_seed {
1667 struct linux_efi_tpm_eventlog {
1669 u32 final_events_preboot_size;
1674 extern int efi_tpm_eventlog_init(void);
1676 struct efi_tcg2_final_events_table {
1681 extern int efi_tpm_final_log_size;
1683 extern unsigned long rci2_table_phys;
1686 * efi_runtime_service() function identifiers.
1687 * "NONE" is used by efi_recover_from_page_fault() to check if the page
1688 * fault happened while executing an efi runtime service.
1694 EFI_GET_WAKEUP_TIME,
1695 EFI_SET_WAKEUP_TIME,
1697 EFI_GET_NEXT_VARIABLE,
1699 EFI_QUERY_VARIABLE_INFO,
1700 EFI_GET_NEXT_HIGH_MONO_COUNT,
1703 EFI_QUERY_CAPSULE_CAPS,
1707 * efi_runtime_work: Details of EFI Runtime Service work
1708 * @arg<1-5>: EFI Runtime Service function arguments
1709 * @status: Status of executing EFI Runtime Service
1710 * @efi_rts_id: EFI Runtime Service function identifier
1711 * @efi_rts_comp: Struct used for handling completions
1713 struct efi_runtime_work {
1719 efi_status_t status;
1720 struct work_struct work;
1721 enum efi_rts_ids efi_rts_id;
1722 struct completion efi_rts_comp;
1725 extern struct efi_runtime_work efi_rts_work;
1727 /* Workqueue to queue EFI Runtime Services */
1728 extern struct workqueue_struct *efi_rts_wq;
1730 struct linux_efi_memreserve {
1731 int size; // allocated size of the array
1732 atomic_t count; // number of entries used
1733 phys_addr_t next; // pa of next struct instance
1740 #define EFI_MEMRESERVE_SIZE(count) (sizeof(struct linux_efi_memreserve) + \
1741 (count) * sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1743 #define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \
1744 / sizeof(((struct linux_efi_memreserve *)0)->entry[0]))
1746 #endif /* _LINUX_EFI_H */