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 typedef guid_t efi_guid_t
;
53 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
54 GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
57 * Generic EFI table header
68 * Memory map descriptor:
72 #define EFI_RESERVED_TYPE 0
73 #define EFI_LOADER_CODE 1
74 #define EFI_LOADER_DATA 2
75 #define EFI_BOOT_SERVICES_CODE 3
76 #define EFI_BOOT_SERVICES_DATA 4
77 #define EFI_RUNTIME_SERVICES_CODE 5
78 #define EFI_RUNTIME_SERVICES_DATA 6
79 #define EFI_CONVENTIONAL_MEMORY 7
80 #define EFI_UNUSABLE_MEMORY 8
81 #define EFI_ACPI_RECLAIM_MEMORY 9
82 #define EFI_ACPI_MEMORY_NVS 10
83 #define EFI_MEMORY_MAPPED_IO 11
84 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
85 #define EFI_PAL_CODE 13
86 #define EFI_PERSISTENT_MEMORY 14
87 #define EFI_MAX_MEMORY_TYPE 15
89 /* Attribute values: */
90 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
91 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
92 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
93 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
94 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
95 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
96 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
97 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
98 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
99 #define EFI_MEMORY_MORE_RELIABLE \
100 ((u64)0x0000000000010000ULL) /* higher reliability */
101 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
102 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
103 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
105 #define EFI_PAGE_SHIFT 12
106 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
107 #define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
123 } efi_capsule_header_t
;
125 struct efi_boot_memmap
{
126 efi_memory_desc_t
**map
;
127 unsigned long *map_size
;
128 unsigned long *desc_size
;
130 unsigned long *key_ptr
;
131 unsigned long *buff_size
;
137 #define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
138 #define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
139 #define EFI_CAPSULE_INITIATE_RESET 0x00040000
141 struct capsule_info
{
142 efi_capsule_header_t header
;
148 size_t page_bytes_remain
;
151 int __efi_capsule_setup_info(struct capsule_info
*cap_info
);
154 * Allocation types for calls to boottime->allocate_pages.
156 #define EFI_ALLOCATE_ANY_PAGES 0
157 #define EFI_ALLOCATE_MAX_ADDRESS 1
158 #define EFI_ALLOCATE_ADDRESS 2
159 #define EFI_MAX_ALLOCATE_TYPE 3
161 typedef int (*efi_freemem_callback_t
) (u64 start
, u64 end
, void *arg
);
164 * Types and defines for Time Services
166 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
167 #define EFI_TIME_IN_DAYLIGHT 0x2
168 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
205 u32 install_protocol_interface
;
206 u32 reinstall_protocol_interface
;
207 u32 uninstall_protocol_interface
;
210 u32 register_protocol_notify
;
212 u32 locate_device_path
;
213 u32 install_configuration_table
;
218 u32 exit_boot_services
;
219 u32 get_next_monotonic_count
;
221 u32 set_watchdog_timer
;
222 u32 connect_controller
;
223 u32 disconnect_controller
;
226 u32 open_protocol_information
;
227 u32 protocols_per_handle
;
228 u32 locate_handle_buffer
;
230 u32 install_multiple_protocol_interfaces
;
231 u32 uninstall_multiple_protocol_interfaces
;
236 } __packed efi_boot_services_32_t
;
253 u64 install_protocol_interface
;
254 u64 reinstall_protocol_interface
;
255 u64 uninstall_protocol_interface
;
258 u64 register_protocol_notify
;
260 u64 locate_device_path
;
261 u64 install_configuration_table
;
266 u64 exit_boot_services
;
267 u64 get_next_monotonic_count
;
269 u64 set_watchdog_timer
;
270 u64 connect_controller
;
271 u64 disconnect_controller
;
274 u64 open_protocol_information
;
275 u64 protocols_per_handle
;
276 u64 locate_handle_buffer
;
278 u64 install_multiple_protocol_interfaces
;
279 u64 uninstall_multiple_protocol_interfaces
;
284 } __packed efi_boot_services_64_t
;
287 * EFI Boot Services table
293 efi_status_t (*allocate_pages
)(int, int, unsigned long,
294 efi_physical_addr_t
*);
295 efi_status_t (*free_pages
)(efi_physical_addr_t
, unsigned long);
296 efi_status_t (*get_memory_map
)(unsigned long *, void *, unsigned long *,
297 unsigned long *, u32
*);
298 efi_status_t (*allocate_pool
)(int, unsigned long, void **);
299 efi_status_t (*free_pool
)(void *);
302 void *wait_for_event
;
306 void *install_protocol_interface
;
307 void *reinstall_protocol_interface
;
308 void *uninstall_protocol_interface
;
309 efi_status_t (*handle_protocol
)(efi_handle_t
, efi_guid_t
*, void **);
311 void *register_protocol_notify
;
312 efi_status_t (*locate_handle
)(int, efi_guid_t
*, void *,
313 unsigned long *, efi_handle_t
*);
314 void *locate_device_path
;
315 efi_status_t (*install_configuration_table
)(efi_guid_t
*, void *);
320 efi_status_t (*exit_boot_services
)(efi_handle_t
, unsigned long);
321 void *get_next_monotonic_count
;
323 void *set_watchdog_timer
;
324 void *connect_controller
;
325 void *disconnect_controller
;
327 void *close_protocol
;
328 void *open_protocol_information
;
329 void *protocols_per_handle
;
330 void *locate_handle_buffer
;
331 efi_status_t (*locate_protocol
)(efi_guid_t
*, void *, void **);
332 void *install_multiple_protocol_interfaces
;
333 void *uninstall_multiple_protocol_interfaces
;
334 void *calculate_crc32
;
337 void *create_event_ex
;
338 } efi_boot_services_t
;
345 EfiPciIoWidthFifoUint8
,
346 EfiPciIoWidthFifoUint16
,
347 EfiPciIoWidthFifoUint32
,
348 EfiPciIoWidthFifoUint64
,
349 EfiPciIoWidthFillUint8
,
350 EfiPciIoWidthFillUint16
,
351 EfiPciIoWidthFillUint32
,
352 EfiPciIoWidthFillUint64
,
354 } EFI_PCI_IO_PROTOCOL_WIDTH
;
357 EfiPciIoAttributeOperationGet
,
358 EfiPciIoAttributeOperationSet
,
359 EfiPciIoAttributeOperationEnable
,
360 EfiPciIoAttributeOperationDisable
,
361 EfiPciIoAttributeOperationSupported
,
362 EfiPciIoAttributeOperationMaximum
363 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION
;
368 } efi_pci_io_protocol_access_32_t
;
373 } efi_pci_io_protocol_access_64_t
;
378 } efi_pci_io_protocol_access_t
;
383 efi_pci_io_protocol_access_32_t mem
;
384 efi_pci_io_protocol_access_32_t io
;
385 efi_pci_io_protocol_access_32_t pci
;
394 u32 get_bar_attributes
;
395 u32 set_bar_attributes
;
398 } efi_pci_io_protocol_32
;
403 efi_pci_io_protocol_access_64_t mem
;
404 efi_pci_io_protocol_access_64_t io
;
405 efi_pci_io_protocol_access_64_t pci
;
414 u64 get_bar_attributes
;
415 u64 set_bar_attributes
;
418 } efi_pci_io_protocol_64
;
423 efi_pci_io_protocol_access_t mem
;
424 efi_pci_io_protocol_access_t io
;
425 efi_pci_io_protocol_access_t pci
;
429 void *allocate_buffer
;
434 void *get_bar_attributes
;
435 void *set_bar_attributes
;
438 } efi_pci_io_protocol
;
440 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
441 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
442 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
443 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
444 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
445 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
446 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
447 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
448 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
449 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
450 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
451 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
452 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
453 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
454 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
455 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
456 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
457 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
458 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
466 } apple_properties_protocol_32_t
;
474 } apple_properties_protocol_64_t
;
477 * Types and defines for EFI ResetSystem
479 #define EFI_RESET_COLD 0
480 #define EFI_RESET_WARM 1
481 #define EFI_RESET_SHUTDOWN 2
484 * EFI Runtime Services table
486 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
487 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
495 u32 set_virtual_address_map
;
498 u32 get_next_variable
;
500 u32 get_next_high_mono_count
;
503 u32 query_capsule_caps
;
504 u32 query_variable_info
;
505 } efi_runtime_services_32_t
;
513 u64 set_virtual_address_map
;
516 u64 get_next_variable
;
518 u64 get_next_high_mono_count
;
521 u64 query_capsule_caps
;
522 u64 query_variable_info
;
523 } efi_runtime_services_64_t
;
525 typedef efi_status_t
efi_get_time_t (efi_time_t
*tm
, efi_time_cap_t
*tc
);
526 typedef efi_status_t
efi_set_time_t (efi_time_t
*tm
);
527 typedef efi_status_t
efi_get_wakeup_time_t (efi_bool_t
*enabled
, efi_bool_t
*pending
,
529 typedef efi_status_t
efi_set_wakeup_time_t (efi_bool_t enabled
, efi_time_t
*tm
);
530 typedef efi_status_t
efi_get_variable_t (efi_char16_t
*name
, efi_guid_t
*vendor
, u32
*attr
,
531 unsigned long *data_size
, void *data
);
532 typedef efi_status_t
efi_get_next_variable_t (unsigned long *name_size
, efi_char16_t
*name
,
534 typedef efi_status_t
efi_set_variable_t (efi_char16_t
*name
, efi_guid_t
*vendor
,
535 u32 attr
, unsigned long data_size
,
537 typedef efi_status_t
efi_get_next_high_mono_count_t (u32
*count
);
538 typedef void efi_reset_system_t (int reset_type
, efi_status_t status
,
539 unsigned long data_size
, efi_char16_t
*data
);
540 typedef efi_status_t
efi_set_virtual_address_map_t (unsigned long memory_map_size
,
541 unsigned long descriptor_size
,
542 u32 descriptor_version
,
543 efi_memory_desc_t
*virtual_map
);
544 typedef efi_status_t
efi_query_variable_info_t(u32 attr
,
546 u64
*remaining_space
,
547 u64
*max_variable_size
);
548 typedef efi_status_t
efi_update_capsule_t(efi_capsule_header_t
**capsules
,
550 unsigned long sg_list
);
551 typedef efi_status_t
efi_query_capsule_caps_t(efi_capsule_header_t
**capsules
,
555 typedef efi_status_t
efi_query_variable_store_t(u32 attributes
,
561 efi_get_time_t
*get_time
;
562 efi_set_time_t
*set_time
;
563 efi_get_wakeup_time_t
*get_wakeup_time
;
564 efi_set_wakeup_time_t
*set_wakeup_time
;
565 efi_set_virtual_address_map_t
*set_virtual_address_map
;
566 void *convert_pointer
;
567 efi_get_variable_t
*get_variable
;
568 efi_get_next_variable_t
*get_next_variable
;
569 efi_set_variable_t
*set_variable
;
570 efi_get_next_high_mono_count_t
*get_next_high_mono_count
;
571 efi_reset_system_t
*reset_system
;
572 efi_update_capsule_t
*update_capsule
;
573 efi_query_capsule_caps_t
*query_capsule_caps
;
574 efi_query_variable_info_t
*query_variable_info
;
575 } efi_runtime_services_t
;
577 void efi_native_runtime_setup(void);
580 * EFI Configuration Table and GUID definitions
582 * These are all defined in a single line to make them easier to
583 * grep for and to see them at a glance - while still having a
584 * similar structure to the definitions in the spec.
586 * Here's how they are structured:
588 * GUID: 12345678-1234-1234-1234-123456789012
590 * #define EFI_SOME_PROTOCOL_GUID \
591 * {0x12345678,0x1234,0x1234,\
592 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
594 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
595 * ^ tabs ^extra space
597 * Note that the 'extra space' separates the values at the same place
598 * where the UEFI SPEC breaks the line.
600 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
601 #define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
602 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
603 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
604 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
605 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
606 #define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
607 #define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
608 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
609 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
610 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
611 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
612 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
613 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
614 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
615 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
616 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
617 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
618 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
619 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
620 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
621 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
622 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
623 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
624 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
625 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
627 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
628 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
631 * This GUID is used to pass to the kernel proper the struct screen_info
632 * structure that was populated by the stub based on the GOP protocol instance
633 * associated with ConOut
635 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
636 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
637 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
642 } efi_config_table_64_t
;
647 } efi_config_table_32_t
;
652 } efi_config_table_t
;
658 } efi_config_table_type_t
;
660 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
662 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
663 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
664 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
665 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
666 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
667 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
671 u64 fw_vendor
; /* physical addr of CHAR16 vendor string */
685 } efi_system_table_64_t
;
689 u32 fw_vendor
; /* physical addr of CHAR16 vendor string */
701 } efi_system_table_32_t
;
705 unsigned long fw_vendor
; /* physical addr of CHAR16 vendor string */
707 unsigned long con_in_handle
;
708 unsigned long con_in
;
709 unsigned long con_out_handle
;
710 unsigned long con_out
;
711 unsigned long stderr_handle
;
712 unsigned long stderr
;
713 efi_runtime_services_t
*runtime
;
714 efi_boot_services_t
*boottime
;
715 unsigned long nr_tables
;
716 unsigned long tables
;
717 } efi_system_table_t
;
720 * Architecture independent structure for describing a memory map for the
721 * benefit of efi_memmap_init_early(), saving us the need to pass four
724 struct efi_memory_map_data
{
725 phys_addr_t phys_map
;
727 unsigned long desc_version
;
728 unsigned long desc_size
;
731 struct efi_memory_map
{
732 phys_addr_t phys_map
;
736 unsigned long desc_version
;
737 unsigned long desc_size
;
741 struct efi_mem_range
{
746 struct efi_fdt_params
{
761 u32 load_options_size
;
764 __aligned_u64 image_size
;
765 unsigned int image_code_type
;
766 unsigned int image_data_type
;
767 unsigned long unload
;
768 } efi_loaded_image_32_t
;
777 u32 load_options_size
;
780 __aligned_u64 image_size
;
781 unsigned int image_code_type
;
782 unsigned int image_data_type
;
783 unsigned long unload
;
784 } efi_loaded_image_64_t
;
789 efi_system_table_t
*system_table
;
793 u32 load_options_size
;
796 __aligned_u64 image_size
;
797 unsigned int image_code_type
;
798 unsigned int image_data_type
;
799 unsigned long unload
;
800 } efi_loaded_image_t
;
807 efi_time_t create_time
;
808 efi_time_t last_access_time
;
809 efi_time_t modification_time
;
810 __aligned_u64 attribute
;
811 efi_char16_t filename
[1];
826 } efi_file_handle_32_t
;
840 } efi_file_handle_64_t
;
842 typedef struct _efi_file_handle
{
844 efi_status_t (*open
)(struct _efi_file_handle
*,
845 struct _efi_file_handle
**,
846 efi_char16_t
*, u64
, u64
);
847 efi_status_t (*close
)(struct _efi_file_handle
*);
849 efi_status_t (*read
)(struct _efi_file_handle
*, unsigned long *,
854 efi_status_t (*get_info
)(struct _efi_file_handle
*, efi_guid_t
*,
855 unsigned long *, void *);
860 typedef struct _efi_file_io_interface
{
862 int (*open_volume
)(struct _efi_file_io_interface
*,
863 efi_file_handle_t
**);
864 } efi_file_io_interface_t
;
866 #define EFI_FILE_MODE_READ 0x0000000000000001
867 #define EFI_FILE_MODE_WRITE 0x0000000000000002
868 #define EFI_FILE_MODE_CREATE 0x8000000000000000
873 u64 memory_protection_attribute
;
874 } efi_properties_table_t
;
876 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000
877 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
879 #define EFI_INVALID_TABLE_ADDR (~0UL)
886 efi_memory_desc_t entry
[0];
887 } efi_memory_attributes_table_t
;
890 * All runtime access to EFI goes through this structure:
893 efi_system_table_t
*systab
; /* EFI system table */
894 unsigned int runtime_version
; /* Runtime services version */
895 unsigned long mps
; /* MPS table */
896 unsigned long acpi
; /* ACPI table (IA64 ext 0.71) */
897 unsigned long acpi20
; /* ACPI table (ACPI 2.0) */
898 unsigned long smbios
; /* SMBIOS table (32 bit entry point) */
899 unsigned long smbios3
; /* SMBIOS table (64 bit entry point) */
900 unsigned long sal_systab
; /* SAL system table */
901 unsigned long boot_info
; /* boot info table */
902 unsigned long hcdp
; /* HCDP table */
903 unsigned long uga
; /* UGA table */
904 unsigned long uv_systab
; /* UV system table */
905 unsigned long fw_vendor
; /* fw_vendor */
906 unsigned long runtime
; /* runtime table */
907 unsigned long config_table
; /* config tables */
908 unsigned long esrt
; /* ESRT table */
909 unsigned long properties_table
; /* properties table */
910 unsigned long mem_attr_table
; /* memory attributes table */
911 unsigned long rng_seed
; /* UEFI firmware random seed */
912 efi_get_time_t
*get_time
;
913 efi_set_time_t
*set_time
;
914 efi_get_wakeup_time_t
*get_wakeup_time
;
915 efi_set_wakeup_time_t
*set_wakeup_time
;
916 efi_get_variable_t
*get_variable
;
917 efi_get_next_variable_t
*get_next_variable
;
918 efi_set_variable_t
*set_variable
;
919 efi_set_variable_t
*set_variable_nonblocking
;
920 efi_query_variable_info_t
*query_variable_info
;
921 efi_query_variable_info_t
*query_variable_info_nonblocking
;
922 efi_update_capsule_t
*update_capsule
;
923 efi_query_capsule_caps_t
*query_capsule_caps
;
924 efi_get_next_high_mono_count_t
*get_next_high_mono_count
;
925 efi_reset_system_t
*reset_system
;
926 efi_set_virtual_address_map_t
*set_virtual_address_map
;
927 struct efi_memory_map memmap
;
932 efi_guidcmp (efi_guid_t left
, efi_guid_t right
)
934 return memcmp(&left
, &right
, sizeof (efi_guid_t
));
938 efi_guid_to_str(efi_guid_t
*guid
, char *out
)
940 sprintf(out
, "%pUl", guid
->b
);
944 extern void efi_init (void);
945 extern void *efi_get_pal_addr (void);
946 extern void efi_map_pal_code (void);
947 extern void efi_memmap_walk (efi_freemem_callback_t callback
, void *arg
);
948 extern void efi_gettimeofday (struct timespec64
*ts
);
949 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
951 extern void efi_late_init(void);
952 extern void efi_free_boot_services(void);
953 extern efi_status_t
efi_query_variable_store(u32 attributes
,
956 extern void efi_find_mirror(void);
958 static inline void efi_late_init(void) {}
959 static inline void efi_free_boot_services(void) {}
961 static inline efi_status_t
efi_query_variable_store(u32 attributes
,
968 extern void __iomem
*efi_lookup_mapped_addr(u64 phys_addr
);
970 extern phys_addr_t __init
efi_memmap_alloc(unsigned int num_entries
);
971 extern int __init
efi_memmap_init_early(struct efi_memory_map_data
*data
);
972 extern int __init
efi_memmap_init_late(phys_addr_t addr
, unsigned long size
);
973 extern void __init
efi_memmap_unmap(void);
974 extern int __init
efi_memmap_install(phys_addr_t addr
, unsigned int nr_map
);
975 extern int __init
efi_memmap_split_count(efi_memory_desc_t
*md
,
976 struct range
*range
);
977 extern void __init
efi_memmap_insert(struct efi_memory_map
*old_memmap
,
978 void *buf
, struct efi_mem_range
*mem
);
980 extern int efi_config_init(efi_config_table_type_t
*arch_tables
);
981 #ifdef CONFIG_EFI_ESRT
982 extern void __init
efi_esrt_init(void);
984 static inline void efi_esrt_init(void) { }
986 extern int efi_config_parse_tables(void *config_tables
, int count
, int sz
,
987 efi_config_table_type_t
*arch_tables
);
988 extern u64
efi_get_iobase (void);
989 extern int efi_mem_type(unsigned long phys_addr
);
990 extern u64
efi_mem_attributes (unsigned long phys_addr
);
991 extern u64
efi_mem_attribute (unsigned long phys_addr
, unsigned long size
);
992 extern int __init
efi_uart_console_only (void);
993 extern u64
efi_mem_desc_end(efi_memory_desc_t
*md
);
994 extern int efi_mem_desc_lookup(u64 phys_addr
, efi_memory_desc_t
*out_md
);
995 extern void efi_mem_reserve(phys_addr_t addr
, u64 size
);
996 extern void efi_initialize_iomem_resources(struct resource
*code_resource
,
997 struct resource
*data_resource
, struct resource
*bss_resource
);
998 extern void efi_reserve_boot_services(void);
999 extern int efi_get_fdt_params(struct efi_fdt_params
*params
);
1000 extern struct kobject
*efi_kobj
;
1002 extern int efi_reboot_quirk_mode
;
1003 extern bool efi_poweroff_required(void);
1005 #ifdef CONFIG_EFI_FAKE_MEMMAP
1006 extern void __init
efi_fake_memmap(void);
1008 static inline void efi_fake_memmap(void) { }
1012 * efi_memattr_perm_setter - arch specific callback function passed into
1013 * efi_memattr_apply_permissions() that updates the
1014 * mapping permissions described by the second
1015 * argument in the page tables referred to by the
1018 typedef int (*efi_memattr_perm_setter
)(struct mm_struct
*, efi_memory_desc_t
*);
1020 extern int efi_memattr_init(void);
1021 extern int efi_memattr_apply_permissions(struct mm_struct
*mm
,
1022 efi_memattr_perm_setter fn
);
1025 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
1026 * @map: the start of efi memmap
1027 * @desc_size: the size of space for each EFI memmap descriptor
1028 * @n: the index of efi memmap descriptor
1030 * EFI boot service provides the GetMemoryMap() function to get a copy of the
1031 * current memory map which is an array of memory descriptors, each of
1032 * which describes a contiguous block of memory. It also gets the size of the
1033 * map, and the size of each descriptor, etc.
1035 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
1036 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
1037 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
1038 * MUST use the returned size of the descriptor to find the start of each
1039 * efi_memory_memdesc_t in the memory map array. This should only be used
1040 * during bootup since for_each_efi_memory_desc_xxx() is available after the
1041 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
1043 #define efi_early_memdesc_ptr(map, desc_size, n) \
1044 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
1046 /* Iterate through an efi_memory_map */
1047 #define for_each_efi_memory_desc_in_map(m, md) \
1048 for ((md) = (m)->map; \
1049 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
1050 (md) = (void *)(md) + (m)->desc_size)
1053 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1054 * @md: the efi_memory_desc_t * iterator
1056 * Once the loop finishes @md must not be accessed.
1058 #define for_each_efi_memory_desc(md) \
1059 for_each_efi_memory_desc_in_map(&efi.memmap, md)
1062 * Format an EFI memory descriptor's type and attributes to a user-provided
1063 * character buffer, as per snprintf(), and return the buffer.
1065 char * __init
efi_md_typeattr_format(char *buf
, size_t size
,
1066 const efi_memory_desc_t
*md
);
1069 * efi_range_is_wc - check the WC bit on an address range
1070 * @start: starting kvirt address
1071 * @len: length of range
1073 * Consult the EFI memory map and make sure it's ok to set this range WC.
1074 * Returns true or false.
1076 static inline int efi_range_is_wc(unsigned long start
, unsigned long len
)
1080 for (i
= 0; i
< len
; i
+= (1UL << EFI_PAGE_SHIFT
)) {
1081 unsigned long paddr
= __pa(start
+ i
);
1082 if (!(efi_mem_attributes(paddr
) & EFI_MEMORY_WC
))
1085 /* The range checked out */
1089 #ifdef CONFIG_EFI_PCDP
1090 extern int __init
efi_setup_pcdp_console(char *);
1094 * We play games with efi_enabled so that the compiler will, if
1095 * possible, remove EFI-related code altogether.
1097 #define EFI_BOOT 0 /* Were we booted from EFI? */
1098 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
1099 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
1100 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
1101 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
1102 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
1103 #define EFI_ARCH_1 7 /* First arch-specific bit */
1104 #define EFI_DBG 8 /* Print additional debug info at runtime */
1105 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
1106 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
1110 * Test whether the above EFI_* bits are enabled.
1112 static inline bool efi_enabled(int feature
)
1114 return test_bit(feature
, &efi
.flags
) != 0;
1116 extern void efi_reboot(enum reboot_mode reboot_mode
, const char *__unused
);
1118 extern bool efi_is_table_address(unsigned long phys_addr
);
1120 static inline bool efi_enabled(int feature
)
1125 efi_reboot(enum reboot_mode reboot_mode
, const char *__unused
) {}
1128 efi_capsule_pending(int *reset_type
)
1133 static inline bool efi_is_table_address(unsigned long phys_addr
)
1139 extern int efi_status_to_err(efi_status_t status
);
1142 * Variable Attributes
1144 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
1145 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1146 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
1147 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1148 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1149 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1150 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
1152 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
1153 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1154 EFI_VARIABLE_RUNTIME_ACCESS | \
1155 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1156 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1157 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1158 EFI_VARIABLE_APPEND_WRITE)
1160 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1161 * not including trailing NUL
1163 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
1166 * The type of search to perform when calling boottime->locate_handle
1168 #define EFI_LOCATE_ALL_HANDLES 0
1169 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
1170 #define EFI_LOCATE_BY_PROTOCOL 2
1173 * EFI Device Path information
1175 #define EFI_DEV_HW 0x01
1176 #define EFI_DEV_PCI 1
1177 #define EFI_DEV_PCCARD 2
1178 #define EFI_DEV_MEM_MAPPED 3
1179 #define EFI_DEV_VENDOR 4
1180 #define EFI_DEV_CONTROLLER 5
1181 #define EFI_DEV_ACPI 0x02
1182 #define EFI_DEV_BASIC_ACPI 1
1183 #define EFI_DEV_EXPANDED_ACPI 2
1184 #define EFI_DEV_MSG 0x03
1185 #define EFI_DEV_MSG_ATAPI 1
1186 #define EFI_DEV_MSG_SCSI 2
1187 #define EFI_DEV_MSG_FC 3
1188 #define EFI_DEV_MSG_1394 4
1189 #define EFI_DEV_MSG_USB 5
1190 #define EFI_DEV_MSG_USB_CLASS 15
1191 #define EFI_DEV_MSG_I20 6
1192 #define EFI_DEV_MSG_MAC 11
1193 #define EFI_DEV_MSG_IPV4 12
1194 #define EFI_DEV_MSG_IPV6 13
1195 #define EFI_DEV_MSG_INFINIBAND 9
1196 #define EFI_DEV_MSG_UART 14
1197 #define EFI_DEV_MSG_VENDOR 10
1198 #define EFI_DEV_MEDIA 0x04
1199 #define EFI_DEV_MEDIA_HARD_DRIVE 1
1200 #define EFI_DEV_MEDIA_CDROM 2
1201 #define EFI_DEV_MEDIA_VENDOR 3
1202 #define EFI_DEV_MEDIA_FILE 4
1203 #define EFI_DEV_MEDIA_PROTOCOL 5
1204 #define EFI_DEV_BIOS_BOOT 0x05
1205 #define EFI_DEV_END_PATH 0x7F
1206 #define EFI_DEV_END_PATH2 0xFF
1207 #define EFI_DEV_END_INSTANCE 0x01
1208 #define EFI_DEV_END_ENTIRE 0xFF
1210 struct efi_generic_dev_path
{
1214 } __attribute ((packed
));
1216 struct efi_dev_path
{
1217 u8 type
; /* can be replaced with unnamed */
1218 u8 sub_type
; /* struct efi_generic_dev_path; */
1219 u16 length
; /* once we've moved to -std=c11 */
1230 } __attribute ((packed
));
1232 #if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER)
1233 struct device
*efi_get_device_by_path(struct efi_dev_path
**node
, size_t *len
);
1236 static inline void memrange_efi_to_native(u64
*addr
, u64
*npages
)
1238 *npages
= PFN_UP(*addr
+ (*npages
<<EFI_PAGE_SHIFT
)) - PFN_DOWN(*addr
);
1243 * EFI Variable support.
1245 * Different firmware drivers can expose their EFI-like variables using
1249 struct efivar_operations
{
1250 efi_get_variable_t
*get_variable
;
1251 efi_get_next_variable_t
*get_next_variable
;
1252 efi_set_variable_t
*set_variable
;
1253 efi_set_variable_t
*set_variable_nonblocking
;
1254 efi_query_variable_store_t
*query_variable_store
;
1259 struct kobject
*kobject
;
1260 const struct efivar_operations
*ops
;
1264 * The maximum size of VariableName + Data = 1024
1265 * Therefore, it's reasonable to save that much
1266 * space in each part of the structure,
1267 * and we use a page for reading/writing.
1270 #define EFI_VAR_NAME_LEN 1024
1272 struct efi_variable
{
1273 efi_char16_t VariableName
[EFI_VAR_NAME_LEN
/sizeof(efi_char16_t
)];
1274 efi_guid_t VendorGuid
;
1275 unsigned long DataSize
;
1277 efi_status_t Status
;
1279 } __attribute__((packed
));
1281 struct efivar_entry
{
1282 struct efi_variable var
;
1283 struct list_head list
;
1284 struct kobject kobj
;
1293 } efi_simple_text_output_protocol_32_t
;
1299 } efi_simple_text_output_protocol_64_t
;
1301 struct efi_simple_text_output_protocol
{
1303 efi_status_t (*output_string
)(void *, void *);
1307 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
1308 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
1309 #define PIXEL_BIT_MASK 2
1310 #define PIXEL_BLT_ONLY 3
1311 #define PIXEL_FORMAT_MAX 4
1313 struct efi_pixel_bitmask
{
1320 struct efi_graphics_output_mode_info
{
1322 u32 horizontal_resolution
;
1323 u32 vertical_resolution
;
1325 struct efi_pixel_bitmask pixel_information
;
1326 u32 pixels_per_scan_line
;
1329 struct efi_graphics_output_protocol_mode_32
{
1334 u64 frame_buffer_base
;
1335 u32 frame_buffer_size
;
1338 struct efi_graphics_output_protocol_mode_64
{
1343 u64 frame_buffer_base
;
1344 u64 frame_buffer_size
;
1347 struct efi_graphics_output_protocol_mode
{
1351 unsigned long size_of_info
;
1352 u64 frame_buffer_base
;
1353 unsigned long frame_buffer_size
;
1356 struct efi_graphics_output_protocol_32
{
1363 struct efi_graphics_output_protocol_64
{
1370 struct efi_graphics_output_protocol
{
1371 unsigned long query_mode
;
1372 unsigned long set_mode
;
1374 struct efi_graphics_output_protocol_mode
*mode
;
1377 typedef efi_status_t (*efi_graphics_output_protocol_query_mode
)(
1378 struct efi_graphics_output_protocol
*, u32
, unsigned long *,
1379 struct efi_graphics_output_mode_info
**);
1381 extern struct list_head efivar_sysfs_list
;
1384 efivar_unregister(struct efivar_entry
*var
)
1386 kobject_put(&var
->kobj
);
1389 int efivars_register(struct efivars
*efivars
,
1390 const struct efivar_operations
*ops
,
1391 struct kobject
*kobject
);
1392 int efivars_unregister(struct efivars
*efivars
);
1393 struct kobject
*efivars_kobject(void);
1395 int efivar_init(int (*func
)(efi_char16_t
*, efi_guid_t
, unsigned long, void *),
1396 void *data
, bool duplicates
, struct list_head
*head
);
1398 int efivar_entry_add(struct efivar_entry
*entry
, struct list_head
*head
);
1399 int efivar_entry_remove(struct efivar_entry
*entry
);
1401 int __efivar_entry_delete(struct efivar_entry
*entry
);
1402 int efivar_entry_delete(struct efivar_entry
*entry
);
1404 int efivar_entry_size(struct efivar_entry
*entry
, unsigned long *size
);
1405 int __efivar_entry_get(struct efivar_entry
*entry
, u32
*attributes
,
1406 unsigned long *size
, void *data
);
1407 int efivar_entry_get(struct efivar_entry
*entry
, u32
*attributes
,
1408 unsigned long *size
, void *data
);
1409 int efivar_entry_set(struct efivar_entry
*entry
, u32 attributes
,
1410 unsigned long size
, void *data
, struct list_head
*head
);
1411 int efivar_entry_set_get_size(struct efivar_entry
*entry
, u32 attributes
,
1412 unsigned long *size
, void *data
, bool *set
);
1413 int efivar_entry_set_safe(efi_char16_t
*name
, efi_guid_t vendor
, u32 attributes
,
1414 bool block
, unsigned long size
, void *data
);
1416 int efivar_entry_iter_begin(void);
1417 void efivar_entry_iter_end(void);
1419 int __efivar_entry_iter(int (*func
)(struct efivar_entry
*, void *),
1420 struct list_head
*head
, void *data
,
1421 struct efivar_entry
**prev
);
1422 int efivar_entry_iter(int (*func
)(struct efivar_entry
*, void *),
1423 struct list_head
*head
, void *data
);
1425 struct efivar_entry
*efivar_entry_find(efi_char16_t
*name
, efi_guid_t guid
,
1426 struct list_head
*head
, bool remove
);
1428 bool efivar_validate(efi_guid_t vendor
, efi_char16_t
*var_name
, u8
*data
,
1429 unsigned long data_size
);
1430 bool efivar_variable_is_removable(efi_guid_t vendor
, const char *name
,
1433 extern struct work_struct efivar_work
;
1434 void efivar_run_worker(void);
1436 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1437 int efivars_sysfs_init(void);
1439 #define EFIVARS_DATA_SIZE_MAX 1024
1441 #endif /* CONFIG_EFI_VARS */
1442 extern bool efi_capsule_pending(int *reset_type
);
1444 extern int efi_capsule_supported(efi_guid_t guid
, u32 flags
,
1445 size_t size
, int *reset
);
1447 extern int efi_capsule_update(efi_capsule_header_t
*capsule
,
1448 phys_addr_t
*pages
);
1450 #ifdef CONFIG_EFI_RUNTIME_MAP
1451 int efi_runtime_map_init(struct kobject
*);
1452 int efi_get_runtime_map_size(void);
1453 int efi_get_runtime_map_desc_size(void);
1454 int efi_runtime_map_copy(void *buf
, size_t bufsz
);
1456 static inline int efi_runtime_map_init(struct kobject
*kobj
)
1461 static inline int efi_get_runtime_map_size(void)
1466 static inline int efi_get_runtime_map_desc_size(void)
1471 static inline int efi_runtime_map_copy(void *buf
, size_t bufsz
)
1478 /* prototypes shared between arch specific and generic stub code */
1480 void efi_printk(efi_system_table_t
*sys_table_arg
, char *str
);
1482 void efi_free(efi_system_table_t
*sys_table_arg
, unsigned long size
,
1483 unsigned long addr
);
1485 char *efi_convert_cmdline(efi_system_table_t
*sys_table_arg
,
1486 efi_loaded_image_t
*image
, int *cmd_line_len
);
1488 efi_status_t
efi_get_memory_map(efi_system_table_t
*sys_table_arg
,
1489 struct efi_boot_memmap
*map
);
1491 efi_status_t
efi_low_alloc(efi_system_table_t
*sys_table_arg
,
1492 unsigned long size
, unsigned long align
,
1493 unsigned long *addr
);
1495 efi_status_t
efi_high_alloc(efi_system_table_t
*sys_table_arg
,
1496 unsigned long size
, unsigned long align
,
1497 unsigned long *addr
, unsigned long max
);
1499 efi_status_t
efi_relocate_kernel(efi_system_table_t
*sys_table_arg
,
1500 unsigned long *image_addr
,
1501 unsigned long image_size
,
1502 unsigned long alloc_size
,
1503 unsigned long preferred_addr
,
1504 unsigned long alignment
);
1506 efi_status_t
handle_cmdline_files(efi_system_table_t
*sys_table_arg
,
1507 efi_loaded_image_t
*image
,
1508 char *cmd_line
, char *option_string
,
1509 unsigned long max_addr
,
1510 unsigned long *load_addr
,
1511 unsigned long *load_size
);
1513 efi_status_t
efi_parse_options(char const *cmdline
);
1515 efi_status_t
efi_setup_gop(efi_system_table_t
*sys_table_arg
,
1516 struct screen_info
*si
, efi_guid_t
*proto
,
1517 unsigned long size
);
1519 bool efi_runtime_disabled(void);
1520 extern void efi_call_virt_check_flags(unsigned long flags
, const char *call
);
1522 enum efi_secureboot_mode
{
1523 efi_secureboot_mode_unset
,
1524 efi_secureboot_mode_unknown
,
1525 efi_secureboot_mode_disabled
,
1526 efi_secureboot_mode_enabled
,
1528 enum efi_secureboot_mode
efi_get_secureboot(efi_system_table_t
*sys_table
);
1530 #ifdef CONFIG_RESET_ATTACK_MITIGATION
1531 void efi_enable_reset_attack_mitigation(efi_system_table_t
*sys_table_arg
);
1534 efi_enable_reset_attack_mitigation(efi_system_table_t
*sys_table_arg
) { }
1538 * Arch code can implement the following three template macros, avoiding
1539 * reptition for the void/non-void return cases of {__,}efi_call_virt():
1541 * * arch_efi_call_virt_setup()
1543 * Sets up the environment for the call (e.g. switching page tables,
1544 * allowing kernel-mode use of floating point, if required).
1546 * * arch_efi_call_virt()
1548 * Performs the call. The last expression in the macro must be the call
1549 * itself, allowing the logic to be shared by the void and non-void
1552 * * arch_efi_call_virt_teardown()
1554 * Restores the usual kernel environment once the call has returned.
1557 #define efi_call_virt_pointer(p, f, args...) \
1560 unsigned long __flags; \
1562 arch_efi_call_virt_setup(); \
1564 local_save_flags(__flags); \
1565 __s = arch_efi_call_virt(p, f, args); \
1566 efi_call_virt_check_flags(__flags, __stringify(f)); \
1568 arch_efi_call_virt_teardown(); \
1573 #define __efi_call_virt_pointer(p, f, args...) \
1575 unsigned long __flags; \
1577 arch_efi_call_virt_setup(); \
1579 local_save_flags(__flags); \
1580 arch_efi_call_virt(p, f, args); \
1581 efi_call_virt_check_flags(__flags, __stringify(f)); \
1583 arch_efi_call_virt_teardown(); \
1586 typedef efi_status_t (*efi_exit_boot_map_processing
)(
1587 efi_system_table_t
*sys_table_arg
,
1588 struct efi_boot_memmap
*map
,
1591 efi_status_t
efi_exit_boot_services(efi_system_table_t
*sys_table
,
1593 struct efi_boot_memmap
*map
,
1595 efi_exit_boot_map_processing priv_func
);
1597 #define EFI_RANDOM_SEED_SIZE 64U
1599 struct linux_efi_random_seed
{
1604 #endif /* _LINUX_EFI_H */