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;
143 efi_capsule_header_t *capsule;
150 size_t page_bytes_remain;
153 int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff,
155 int __efi_capsule_setup_info(struct capsule_info *cap_info);
158 * Allocation types for calls to boottime->allocate_pages.
160 #define EFI_ALLOCATE_ANY_PAGES 0
161 #define EFI_ALLOCATE_MAX_ADDRESS 1
162 #define EFI_ALLOCATE_ADDRESS 2
163 #define EFI_MAX_ALLOCATE_TYPE 3
165 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
168 * Types and defines for Time Services
170 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
171 #define EFI_TIME_IN_DAYLIGHT 0x2
172 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
209 u32 install_protocol_interface;
210 u32 reinstall_protocol_interface;
211 u32 uninstall_protocol_interface;
214 u32 register_protocol_notify;
216 u32 locate_device_path;
217 u32 install_configuration_table;
222 u32 exit_boot_services;
223 u32 get_next_monotonic_count;
225 u32 set_watchdog_timer;
226 u32 connect_controller;
227 u32 disconnect_controller;
230 u32 open_protocol_information;
231 u32 protocols_per_handle;
232 u32 locate_handle_buffer;
234 u32 install_multiple_protocol_interfaces;
235 u32 uninstall_multiple_protocol_interfaces;
240 } __packed efi_boot_services_32_t;
257 u64 install_protocol_interface;
258 u64 reinstall_protocol_interface;
259 u64 uninstall_protocol_interface;
262 u64 register_protocol_notify;
264 u64 locate_device_path;
265 u64 install_configuration_table;
270 u64 exit_boot_services;
271 u64 get_next_monotonic_count;
273 u64 set_watchdog_timer;
274 u64 connect_controller;
275 u64 disconnect_controller;
278 u64 open_protocol_information;
279 u64 protocols_per_handle;
280 u64 locate_handle_buffer;
282 u64 install_multiple_protocol_interfaces;
283 u64 uninstall_multiple_protocol_interfaces;
288 } __packed efi_boot_services_64_t;
291 * EFI Boot Services table
297 efi_status_t (*allocate_pages)(int, int, unsigned long,
298 efi_physical_addr_t *);
299 efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
300 efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
301 unsigned long *, u32 *);
302 efi_status_t (*allocate_pool)(int, unsigned long, void **);
303 efi_status_t (*free_pool)(void *);
306 void *wait_for_event;
310 void *install_protocol_interface;
311 void *reinstall_protocol_interface;
312 void *uninstall_protocol_interface;
313 efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
315 void *register_protocol_notify;
316 efi_status_t (*locate_handle)(int, efi_guid_t *, void *,
317 unsigned long *, efi_handle_t *);
318 void *locate_device_path;
319 efi_status_t (*install_configuration_table)(efi_guid_t *, void *);
324 efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
325 void *get_next_monotonic_count;
327 void *set_watchdog_timer;
328 void *connect_controller;
329 void *disconnect_controller;
331 void *close_protocol;
332 void *open_protocol_information;
333 void *protocols_per_handle;
334 void *locate_handle_buffer;
335 efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
336 void *install_multiple_protocol_interfaces;
337 void *uninstall_multiple_protocol_interfaces;
338 void *calculate_crc32;
341 void *create_event_ex;
342 } efi_boot_services_t;
349 EfiPciIoWidthFifoUint8,
350 EfiPciIoWidthFifoUint16,
351 EfiPciIoWidthFifoUint32,
352 EfiPciIoWidthFifoUint64,
353 EfiPciIoWidthFillUint8,
354 EfiPciIoWidthFillUint16,
355 EfiPciIoWidthFillUint32,
356 EfiPciIoWidthFillUint64,
358 } EFI_PCI_IO_PROTOCOL_WIDTH;
361 EfiPciIoAttributeOperationGet,
362 EfiPciIoAttributeOperationSet,
363 EfiPciIoAttributeOperationEnable,
364 EfiPciIoAttributeOperationDisable,
365 EfiPciIoAttributeOperationSupported,
366 EfiPciIoAttributeOperationMaximum
367 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
372 } efi_pci_io_protocol_access_32_t;
377 } efi_pci_io_protocol_access_64_t;
382 } efi_pci_io_protocol_access_t;
387 efi_pci_io_protocol_access_32_t mem;
388 efi_pci_io_protocol_access_32_t io;
389 efi_pci_io_protocol_access_32_t pci;
398 u32 get_bar_attributes;
399 u32 set_bar_attributes;
402 } efi_pci_io_protocol_32;
407 efi_pci_io_protocol_access_64_t mem;
408 efi_pci_io_protocol_access_64_t io;
409 efi_pci_io_protocol_access_64_t pci;
418 u64 get_bar_attributes;
419 u64 set_bar_attributes;
422 } efi_pci_io_protocol_64;
427 efi_pci_io_protocol_access_t mem;
428 efi_pci_io_protocol_access_t io;
429 efi_pci_io_protocol_access_t pci;
433 void *allocate_buffer;
438 void *get_bar_attributes;
439 void *set_bar_attributes;
442 } efi_pci_io_protocol;
444 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
445 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
446 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
447 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
448 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
449 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
450 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
451 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
452 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
453 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
454 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
455 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
456 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
457 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
458 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
459 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
460 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
461 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
462 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
470 } apple_properties_protocol_32_t;
478 } apple_properties_protocol_64_t;
481 * Types and defines for EFI ResetSystem
483 #define EFI_RESET_COLD 0
484 #define EFI_RESET_WARM 1
485 #define EFI_RESET_SHUTDOWN 2
488 * EFI Runtime Services table
490 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
491 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
499 u32 set_virtual_address_map;
502 u32 get_next_variable;
504 u32 get_next_high_mono_count;
507 u32 query_capsule_caps;
508 u32 query_variable_info;
509 } efi_runtime_services_32_t;
517 u64 set_virtual_address_map;
520 u64 get_next_variable;
522 u64 get_next_high_mono_count;
525 u64 query_capsule_caps;
526 u64 query_variable_info;
527 } efi_runtime_services_64_t;
529 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
530 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
531 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
533 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
534 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
535 unsigned long *data_size, void *data);
536 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
538 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
539 u32 attr, unsigned long data_size,
541 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
542 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
543 unsigned long data_size, efi_char16_t *data);
544 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
545 unsigned long descriptor_size,
546 u32 descriptor_version,
547 efi_memory_desc_t *virtual_map);
548 typedef efi_status_t efi_query_variable_info_t(u32 attr,
550 u64 *remaining_space,
551 u64 *max_variable_size);
552 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
554 unsigned long sg_list);
555 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
559 typedef efi_status_t efi_query_variable_store_t(u32 attributes,
565 efi_get_time_t *get_time;
566 efi_set_time_t *set_time;
567 efi_get_wakeup_time_t *get_wakeup_time;
568 efi_set_wakeup_time_t *set_wakeup_time;
569 efi_set_virtual_address_map_t *set_virtual_address_map;
570 void *convert_pointer;
571 efi_get_variable_t *get_variable;
572 efi_get_next_variable_t *get_next_variable;
573 efi_set_variable_t *set_variable;
574 efi_get_next_high_mono_count_t *get_next_high_mono_count;
575 efi_reset_system_t *reset_system;
576 efi_update_capsule_t *update_capsule;
577 efi_query_capsule_caps_t *query_capsule_caps;
578 efi_query_variable_info_t *query_variable_info;
579 } efi_runtime_services_t;
581 void efi_native_runtime_setup(void);
584 * EFI Configuration Table and GUID definitions
586 * These are all defined in a single line to make them easier to
587 * grep for and to see them at a glance - while still having a
588 * similar structure to the definitions in the spec.
590 * Here's how they are structured:
592 * GUID: 12345678-1234-1234-1234-123456789012
594 * #define EFI_SOME_PROTOCOL_GUID \
595 * {0x12345678,0x1234,0x1234,\
596 * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}}
598 * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12)
599 * ^ tabs ^extra space
601 * Note that the 'extra space' separates the values at the same place
602 * where the UEFI SPEC breaks the line.
604 #define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
605 #define MPS_TABLE_GUID EFI_GUID(0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
606 #define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
607 #define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)
608 #define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
609 #define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
610 #define SAL_SYSTEM_TABLE_GUID EFI_GUID(0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
611 #define HCDP_TABLE_GUID EFI_GUID(0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98)
612 #define UGA_IO_PROTOCOL_GUID EFI_GUID(0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0x0b, 0x07, 0xa2)
613 #define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
614 #define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)
615 #define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)
616 #define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
617 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)
618 #define EFI_UGA_PROTOCOL_GUID EFI_GUID(0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39)
619 #define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)
620 #define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
621 #define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)
622 #define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
623 #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)
624 #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5)
625 #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
626 #define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
627 #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
628 #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
629 #define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
631 #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
632 #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
635 * This GUID is used to pass to the kernel proper the struct screen_info
636 * structure that was populated by the stub based on the GOP protocol instance
637 * associated with ConOut
639 #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
640 #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
641 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
646 } efi_config_table_64_t;
651 } efi_config_table_32_t;
656 } efi_config_table_t;
662 } efi_config_table_type_t;
664 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
666 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
667 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
668 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
669 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
670 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
671 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
675 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
689 } efi_system_table_64_t;
693 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
705 } efi_system_table_32_t;
709 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
711 unsigned long con_in_handle;
712 unsigned long con_in;
713 unsigned long con_out_handle;
714 unsigned long con_out;
715 unsigned long stderr_handle;
716 unsigned long stderr;
717 efi_runtime_services_t *runtime;
718 efi_boot_services_t *boottime;
719 unsigned long nr_tables;
720 unsigned long tables;
721 } efi_system_table_t;
724 * Architecture independent structure for describing a memory map for the
725 * benefit of efi_memmap_init_early(), saving us the need to pass four
728 struct efi_memory_map_data {
729 phys_addr_t phys_map;
731 unsigned long desc_version;
732 unsigned long desc_size;
735 struct efi_memory_map {
736 phys_addr_t phys_map;
740 unsigned long desc_version;
741 unsigned long desc_size;
745 struct efi_mem_range {
750 struct efi_fdt_params {
765 u32 load_options_size;
768 __aligned_u64 image_size;
769 unsigned int image_code_type;
770 unsigned int image_data_type;
771 unsigned long unload;
772 } efi_loaded_image_32_t;
781 u32 load_options_size;
784 __aligned_u64 image_size;
785 unsigned int image_code_type;
786 unsigned int image_data_type;
787 unsigned long unload;
788 } efi_loaded_image_64_t;
793 efi_system_table_t *system_table;
797 u32 load_options_size;
800 __aligned_u64 image_size;
801 unsigned int image_code_type;
802 unsigned int image_data_type;
803 unsigned long unload;
804 } efi_loaded_image_t;
811 efi_time_t create_time;
812 efi_time_t last_access_time;
813 efi_time_t modification_time;
814 __aligned_u64 attribute;
815 efi_char16_t filename[1];
830 } efi_file_handle_32_t;
844 } efi_file_handle_64_t;
846 typedef struct _efi_file_handle {
848 efi_status_t (*open)(struct _efi_file_handle *,
849 struct _efi_file_handle **,
850 efi_char16_t *, u64, u64);
851 efi_status_t (*close)(struct _efi_file_handle *);
853 efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
858 efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
859 unsigned long *, void *);
864 typedef struct _efi_file_io_interface {
866 int (*open_volume)(struct _efi_file_io_interface *,
867 efi_file_handle_t **);
868 } efi_file_io_interface_t;
870 #define EFI_FILE_MODE_READ 0x0000000000000001
871 #define EFI_FILE_MODE_WRITE 0x0000000000000002
872 #define EFI_FILE_MODE_CREATE 0x8000000000000000
877 u64 memory_protection_attribute;
878 } efi_properties_table_t;
880 #define EFI_PROPERTIES_TABLE_VERSION 0x00010000
881 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1
883 #define EFI_INVALID_TABLE_ADDR (~0UL)
890 efi_memory_desc_t entry[0];
891 } efi_memory_attributes_table_t;
894 * All runtime access to EFI goes through this structure:
897 efi_system_table_t *systab; /* EFI system table */
898 unsigned int runtime_version; /* Runtime services version */
899 unsigned long mps; /* MPS table */
900 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
901 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
902 unsigned long smbios; /* SMBIOS table (32 bit entry point) */
903 unsigned long smbios3; /* SMBIOS table (64 bit entry point) */
904 unsigned long sal_systab; /* SAL system table */
905 unsigned long boot_info; /* boot info table */
906 unsigned long hcdp; /* HCDP table */
907 unsigned long uga; /* UGA table */
908 unsigned long uv_systab; /* UV system table */
909 unsigned long fw_vendor; /* fw_vendor */
910 unsigned long runtime; /* runtime table */
911 unsigned long config_table; /* config tables */
912 unsigned long esrt; /* ESRT table */
913 unsigned long properties_table; /* properties table */
914 unsigned long mem_attr_table; /* memory attributes table */
915 unsigned long rng_seed; /* UEFI firmware random seed */
916 efi_get_time_t *get_time;
917 efi_set_time_t *set_time;
918 efi_get_wakeup_time_t *get_wakeup_time;
919 efi_set_wakeup_time_t *set_wakeup_time;
920 efi_get_variable_t *get_variable;
921 efi_get_next_variable_t *get_next_variable;
922 efi_set_variable_t *set_variable;
923 efi_set_variable_t *set_variable_nonblocking;
924 efi_query_variable_info_t *query_variable_info;
925 efi_query_variable_info_t *query_variable_info_nonblocking;
926 efi_update_capsule_t *update_capsule;
927 efi_query_capsule_caps_t *query_capsule_caps;
928 efi_get_next_high_mono_count_t *get_next_high_mono_count;
929 efi_reset_system_t *reset_system;
930 efi_set_virtual_address_map_t *set_virtual_address_map;
931 struct efi_memory_map memmap;
936 efi_guidcmp (efi_guid_t left, efi_guid_t right)
938 return memcmp(&left, &right, sizeof (efi_guid_t));
942 efi_guid_to_str(efi_guid_t *guid, char *out)
944 sprintf(out, "%pUl", guid->b);
948 extern void efi_init (void);
949 extern void *efi_get_pal_addr (void);
950 extern void efi_map_pal_code (void);
951 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
952 extern void efi_gettimeofday (struct timespec64 *ts);
954 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
956 static inline void efi_enter_virtual_mode (void) {}
959 extern void efi_late_init(void);
960 extern void efi_free_boot_services(void);
961 extern efi_status_t efi_query_variable_store(u32 attributes,
964 extern void efi_find_mirror(void);
966 static inline void efi_late_init(void) {}
967 static inline void efi_free_boot_services(void) {}
969 static inline efi_status_t efi_query_variable_store(u32 attributes,
976 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
978 extern phys_addr_t __init efi_memmap_alloc(unsigned int num_entries);
979 extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
980 extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
981 extern void __init efi_memmap_unmap(void);
982 extern int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map);
983 extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
984 struct range *range);
985 extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
986 void *buf, struct efi_mem_range *mem);
988 extern int efi_config_init(efi_config_table_type_t *arch_tables);
989 #ifdef CONFIG_EFI_ESRT
990 extern void __init efi_esrt_init(void);
992 static inline void efi_esrt_init(void) { }
994 extern int efi_config_parse_tables(void *config_tables, int count, int sz,
995 efi_config_table_type_t *arch_tables);
996 extern u64 efi_get_iobase (void);
997 extern int efi_mem_type(unsigned long phys_addr);
998 extern u64 efi_mem_attributes (unsigned long phys_addr);
999 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
1000 extern int __init efi_uart_console_only (void);
1001 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
1002 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
1003 extern void efi_mem_reserve(phys_addr_t addr, u64 size);
1004 extern void efi_initialize_iomem_resources(struct resource *code_resource,
1005 struct resource *data_resource, struct resource *bss_resource);
1006 extern void efi_reserve_boot_services(void);
1007 extern int efi_get_fdt_params(struct efi_fdt_params *params);
1008 extern struct kobject *efi_kobj;
1010 extern int efi_reboot_quirk_mode;
1011 extern bool efi_poweroff_required(void);
1013 #ifdef CONFIG_EFI_FAKE_MEMMAP
1014 extern void __init efi_fake_memmap(void);
1016 static inline void efi_fake_memmap(void) { }
1020 * efi_memattr_perm_setter - arch specific callback function passed into
1021 * efi_memattr_apply_permissions() that updates the
1022 * mapping permissions described by the second
1023 * argument in the page tables referred to by the
1026 typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
1028 extern int efi_memattr_init(void);
1029 extern int efi_memattr_apply_permissions(struct mm_struct *mm,
1030 efi_memattr_perm_setter fn);
1033 * efi_early_memdesc_ptr - get the n-th EFI memmap descriptor
1034 * @map: the start of efi memmap
1035 * @desc_size: the size of space for each EFI memmap descriptor
1036 * @n: the index of efi memmap descriptor
1038 * EFI boot service provides the GetMemoryMap() function to get a copy of the
1039 * current memory map which is an array of memory descriptors, each of
1040 * which describes a contiguous block of memory. It also gets the size of the
1041 * map, and the size of each descriptor, etc.
1043 * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of
1044 * each descriptor might not be equal to sizeof(efi_memory_memdesc_t),
1045 * since efi_memory_memdesc_t may be extended in the future. Thus the OS
1046 * MUST use the returned size of the descriptor to find the start of each
1047 * efi_memory_memdesc_t in the memory map array. This should only be used
1048 * during bootup since for_each_efi_memory_desc_xxx() is available after the
1049 * kernel initializes the EFI subsystem to set up struct efi_memory_map.
1051 #define efi_early_memdesc_ptr(map, desc_size, n) \
1052 (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
1054 /* Iterate through an efi_memory_map */
1055 #define for_each_efi_memory_desc_in_map(m, md) \
1056 for ((md) = (m)->map; \
1057 (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \
1058 (md) = (void *)(md) + (m)->desc_size)
1061 * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
1062 * @md: the efi_memory_desc_t * iterator
1064 * Once the loop finishes @md must not be accessed.
1066 #define for_each_efi_memory_desc(md) \
1067 for_each_efi_memory_desc_in_map(&efi.memmap, md)
1070 * Format an EFI memory descriptor's type and attributes to a user-provided
1071 * character buffer, as per snprintf(), and return the buffer.
1073 char * __init efi_md_typeattr_format(char *buf, size_t size,
1074 const efi_memory_desc_t *md);
1077 * efi_range_is_wc - check the WC bit on an address range
1078 * @start: starting kvirt address
1079 * @len: length of range
1081 * Consult the EFI memory map and make sure it's ok to set this range WC.
1082 * Returns true or false.
1084 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
1088 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
1089 unsigned long paddr = __pa(start + i);
1090 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
1093 /* The range checked out */
1097 #ifdef CONFIG_EFI_PCDP
1098 extern int __init efi_setup_pcdp_console(char *);
1102 * We play games with efi_enabled so that the compiler will, if
1103 * possible, remove EFI-related code altogether.
1105 #define EFI_BOOT 0 /* Were we booted from EFI? */
1106 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
1107 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
1108 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
1109 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
1110 #define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
1111 #define EFI_ARCH_1 7 /* First arch-specific bit */
1112 #define EFI_DBG 8 /* Print additional debug info at runtime */
1113 #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
1114 #define EFI_MEM_ATTR 10 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
1118 * Test whether the above EFI_* bits are enabled.
1120 static inline bool efi_enabled(int feature)
1122 return test_bit(feature, &efi.flags) != 0;
1124 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
1126 extern bool efi_is_table_address(unsigned long phys_addr);
1128 static inline bool efi_enabled(int feature)
1133 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
1136 efi_capsule_pending(int *reset_type)
1141 static inline bool efi_is_table_address(unsigned long phys_addr)
1147 extern int efi_status_to_err(efi_status_t status);
1150 * Variable Attributes
1152 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
1153 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
1154 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
1155 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
1156 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
1157 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
1158 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
1160 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
1161 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
1162 EFI_VARIABLE_RUNTIME_ACCESS | \
1163 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
1164 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
1165 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
1166 EFI_VARIABLE_APPEND_WRITE)
1168 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
1169 * not including trailing NUL
1171 #define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
1174 * The type of search to perform when calling boottime->locate_handle
1176 #define EFI_LOCATE_ALL_HANDLES 0
1177 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
1178 #define EFI_LOCATE_BY_PROTOCOL 2
1181 * EFI Device Path information
1183 #define EFI_DEV_HW 0x01
1184 #define EFI_DEV_PCI 1
1185 #define EFI_DEV_PCCARD 2
1186 #define EFI_DEV_MEM_MAPPED 3
1187 #define EFI_DEV_VENDOR 4
1188 #define EFI_DEV_CONTROLLER 5
1189 #define EFI_DEV_ACPI 0x02
1190 #define EFI_DEV_BASIC_ACPI 1
1191 #define EFI_DEV_EXPANDED_ACPI 2
1192 #define EFI_DEV_MSG 0x03
1193 #define EFI_DEV_MSG_ATAPI 1
1194 #define EFI_DEV_MSG_SCSI 2
1195 #define EFI_DEV_MSG_FC 3
1196 #define EFI_DEV_MSG_1394 4
1197 #define EFI_DEV_MSG_USB 5
1198 #define EFI_DEV_MSG_USB_CLASS 15
1199 #define EFI_DEV_MSG_I20 6
1200 #define EFI_DEV_MSG_MAC 11
1201 #define EFI_DEV_MSG_IPV4 12
1202 #define EFI_DEV_MSG_IPV6 13
1203 #define EFI_DEV_MSG_INFINIBAND 9
1204 #define EFI_DEV_MSG_UART 14
1205 #define EFI_DEV_MSG_VENDOR 10
1206 #define EFI_DEV_MEDIA 0x04
1207 #define EFI_DEV_MEDIA_HARD_DRIVE 1
1208 #define EFI_DEV_MEDIA_CDROM 2
1209 #define EFI_DEV_MEDIA_VENDOR 3
1210 #define EFI_DEV_MEDIA_FILE 4
1211 #define EFI_DEV_MEDIA_PROTOCOL 5
1212 #define EFI_DEV_BIOS_BOOT 0x05
1213 #define EFI_DEV_END_PATH 0x7F
1214 #define EFI_DEV_END_PATH2 0xFF
1215 #define EFI_DEV_END_INSTANCE 0x01
1216 #define EFI_DEV_END_ENTIRE 0xFF
1218 struct efi_generic_dev_path {
1222 } __attribute ((packed));
1224 struct efi_dev_path {
1225 u8 type; /* can be replaced with unnamed */
1226 u8 sub_type; /* struct efi_generic_dev_path; */
1227 u16 length; /* once we've moved to -std=c11 */
1238 } __attribute ((packed));
1240 #if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER)
1241 struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len);
1244 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
1246 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
1251 * EFI Variable support.
1253 * Different firmware drivers can expose their EFI-like variables using
1257 struct efivar_operations {
1258 efi_get_variable_t *get_variable;
1259 efi_get_next_variable_t *get_next_variable;
1260 efi_set_variable_t *set_variable;
1261 efi_set_variable_t *set_variable_nonblocking;
1262 efi_query_variable_store_t *query_variable_store;
1267 struct kobject *kobject;
1268 const struct efivar_operations *ops;
1272 * The maximum size of VariableName + Data = 1024
1273 * Therefore, it's reasonable to save that much
1274 * space in each part of the structure,
1275 * and we use a page for reading/writing.
1278 #define EFI_VAR_NAME_LEN 1024
1280 struct efi_variable {
1281 efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
1282 efi_guid_t VendorGuid;
1283 unsigned long DataSize;
1285 efi_status_t Status;
1287 } __attribute__((packed));
1289 struct efivar_entry {
1290 struct efi_variable var;
1291 struct list_head list;
1292 struct kobject kobj;
1301 } efi_simple_text_output_protocol_32_t;
1307 } efi_simple_text_output_protocol_64_t;
1309 struct efi_simple_text_output_protocol {
1311 efi_status_t (*output_string)(void *, void *);
1315 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
1316 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
1317 #define PIXEL_BIT_MASK 2
1318 #define PIXEL_BLT_ONLY 3
1319 #define PIXEL_FORMAT_MAX 4
1321 struct efi_pixel_bitmask {
1328 struct efi_graphics_output_mode_info {
1330 u32 horizontal_resolution;
1331 u32 vertical_resolution;
1333 struct efi_pixel_bitmask pixel_information;
1334 u32 pixels_per_scan_line;
1337 struct efi_graphics_output_protocol_mode_32 {
1342 u64 frame_buffer_base;
1343 u32 frame_buffer_size;
1346 struct efi_graphics_output_protocol_mode_64 {
1351 u64 frame_buffer_base;
1352 u64 frame_buffer_size;
1355 struct efi_graphics_output_protocol_mode {
1359 unsigned long size_of_info;
1360 u64 frame_buffer_base;
1361 unsigned long frame_buffer_size;
1364 struct efi_graphics_output_protocol_32 {
1371 struct efi_graphics_output_protocol_64 {
1378 struct efi_graphics_output_protocol {
1379 unsigned long query_mode;
1380 unsigned long set_mode;
1382 struct efi_graphics_output_protocol_mode *mode;
1385 typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
1386 struct efi_graphics_output_protocol *, u32, unsigned long *,
1387 struct efi_graphics_output_mode_info **);
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(efi_system_table_t *sys_table_arg, char *str);
1490 void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
1491 unsigned long addr);
1493 char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
1494 efi_loaded_image_t *image, int *cmd_line_len);
1496 efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
1497 struct efi_boot_memmap *map);
1499 efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
1500 unsigned long size, unsigned long align,
1501 unsigned long *addr);
1503 efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
1504 unsigned long size, unsigned long align,
1505 unsigned long *addr, unsigned long max);
1507 efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
1508 unsigned long *image_addr,
1509 unsigned long image_size,
1510 unsigned long alloc_size,
1511 unsigned long preferred_addr,
1512 unsigned long alignment);
1514 efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
1515 efi_loaded_image_t *image,
1516 char *cmd_line, char *option_string,
1517 unsigned long max_addr,
1518 unsigned long *load_addr,
1519 unsigned long *load_size);
1521 efi_status_t efi_parse_options(char const *cmdline);
1523 efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
1524 struct screen_info *si, efi_guid_t *proto,
1525 unsigned long size);
1528 extern bool efi_runtime_disabled(void);
1530 static inline bool efi_runtime_disabled(void) { return true; }
1533 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
1535 enum efi_secureboot_mode {
1536 efi_secureboot_mode_unset,
1537 efi_secureboot_mode_unknown,
1538 efi_secureboot_mode_disabled,
1539 efi_secureboot_mode_enabled,
1541 enum efi_secureboot_mode efi_get_secureboot(efi_system_table_t *sys_table);
1543 #ifdef CONFIG_RESET_ATTACK_MITIGATION
1544 void efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg);
1547 efi_enable_reset_attack_mitigation(efi_system_table_t *sys_table_arg) { }
1551 * Arch code can implement the following three template macros, avoiding
1552 * reptition for the void/non-void return cases of {__,}efi_call_virt():
1554 * * arch_efi_call_virt_setup()
1556 * Sets up the environment for the call (e.g. switching page tables,
1557 * allowing kernel-mode use of floating point, if required).
1559 * * arch_efi_call_virt()
1561 * Performs the call. The last expression in the macro must be the call
1562 * itself, allowing the logic to be shared by the void and non-void
1565 * * arch_efi_call_virt_teardown()
1567 * Restores the usual kernel environment once the call has returned.
1570 #define efi_call_virt_pointer(p, f, args...) \
1573 unsigned long __flags; \
1575 arch_efi_call_virt_setup(); \
1577 local_save_flags(__flags); \
1578 __s = arch_efi_call_virt(p, f, args); \
1579 efi_call_virt_check_flags(__flags, __stringify(f)); \
1581 arch_efi_call_virt_teardown(); \
1586 #define __efi_call_virt_pointer(p, f, args...) \
1588 unsigned long __flags; \
1590 arch_efi_call_virt_setup(); \
1592 local_save_flags(__flags); \
1593 arch_efi_call_virt(p, f, args); \
1594 efi_call_virt_check_flags(__flags, __stringify(f)); \
1596 arch_efi_call_virt_teardown(); \
1599 typedef efi_status_t (*efi_exit_boot_map_processing)(
1600 efi_system_table_t *sys_table_arg,
1601 struct efi_boot_memmap *map,
1604 efi_status_t efi_exit_boot_services(efi_system_table_t *sys_table,
1606 struct efi_boot_memmap *map,
1608 efi_exit_boot_map_processing priv_func);
1610 #define EFI_RANDOM_SEED_SIZE 32U // BLAKE2S_HASH_SIZE
1612 struct linux_efi_random_seed {
1617 #endif /* _LINUX_EFI_H */