5 * Extensible Firmware Interface
6 * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
8 * Copyright (C) 1999 VA Linux Systems
9 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
10 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
11 * David Mosberger-Tang <davidm@hpl.hp.com>
12 * Stephane Eranian <eranian@hpl.hp.com>
14 #include <linux/init.h>
15 #include <linux/string.h>
16 #include <linux/time.h>
17 #include <linux/types.h>
18 #include <linux/proc_fs.h>
19 #include <linux/rtc.h>
20 #include <linux/ioport.h>
21 #include <linux/pfn.h>
22 #include <linux/pstore.h>
27 #define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))
28 #define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1)))
29 #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1)))
30 #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))
31 #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1)))
32 #define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1)))
33 #define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1)))
34 #define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1)))
35 #define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1)))
36 #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
37 #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
39 typedef unsigned long efi_status_t
;
40 typedef u8 efi_bool_t
;
41 typedef u16 efi_char16_t
; /* UNICODE character */
42 typedef u64 efi_physical_addr_t
;
43 typedef void *efi_handle_t
;
50 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
52 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
53 (b) & 0xff, ((b) >> 8) & 0xff, \
54 (c) & 0xff, ((c) >> 8) & 0xff, \
55 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
58 * Generic EFI table header
69 * Memory map descriptor:
73 #define EFI_RESERVED_TYPE 0
74 #define EFI_LOADER_CODE 1
75 #define EFI_LOADER_DATA 2
76 #define EFI_BOOT_SERVICES_CODE 3
77 #define EFI_BOOT_SERVICES_DATA 4
78 #define EFI_RUNTIME_SERVICES_CODE 5
79 #define EFI_RUNTIME_SERVICES_DATA 6
80 #define EFI_CONVENTIONAL_MEMORY 7
81 #define EFI_UNUSABLE_MEMORY 8
82 #define EFI_ACPI_RECLAIM_MEMORY 9
83 #define EFI_ACPI_MEMORY_NVS 10
84 #define EFI_MEMORY_MAPPED_IO 11
85 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
86 #define EFI_PAL_CODE 13
87 #define EFI_MAX_MEMORY_TYPE 14
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_WP ((u64)0x0000000000001000ULL) /* write-protect */
95 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
96 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
97 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
98 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
100 #define EFI_PAGE_SHIFT 12
101 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
117 } efi_capsule_header_t
;
120 * Allocation types for calls to boottime->allocate_pages.
122 #define EFI_ALLOCATE_ANY_PAGES 0
123 #define EFI_ALLOCATE_MAX_ADDRESS 1
124 #define EFI_ALLOCATE_ADDRESS 2
125 #define EFI_MAX_ALLOCATE_TYPE 3
127 typedef int (*efi_freemem_callback_t
) (u64 start
, u64 end
, void *arg
);
130 * Types and defines for Time Services
132 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
133 #define EFI_TIME_IN_DAYLIGHT 0x2
134 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
171 u32 install_protocol_interface
;
172 u32 reinstall_protocol_interface
;
173 u32 uninstall_protocol_interface
;
176 u32 register_protocol_notify
;
178 u32 locate_device_path
;
179 u32 install_configuration_table
;
184 u32 exit_boot_services
;
185 u32 get_next_monotonic_count
;
187 u32 set_watchdog_timer
;
188 u32 connect_controller
;
189 u32 disconnect_controller
;
192 u32 open_protocol_information
;
193 u32 protocols_per_handle
;
194 u32 locate_handle_buffer
;
196 u32 install_multiple_protocol_interfaces
;
197 u32 uninstall_multiple_protocol_interfaces
;
202 } __packed efi_boot_services_32_t
;
219 u64 install_protocol_interface
;
220 u64 reinstall_protocol_interface
;
221 u64 uninstall_protocol_interface
;
224 u64 register_protocol_notify
;
226 u64 locate_device_path
;
227 u64 install_configuration_table
;
232 u64 exit_boot_services
;
233 u64 get_next_monotonic_count
;
235 u64 set_watchdog_timer
;
236 u64 connect_controller
;
237 u64 disconnect_controller
;
240 u64 open_protocol_information
;
241 u64 protocols_per_handle
;
242 u64 locate_handle_buffer
;
244 u64 install_multiple_protocol_interfaces
;
245 u64 uninstall_multiple_protocol_interfaces
;
250 } __packed efi_boot_services_64_t
;
253 * EFI Boot Services table
259 efi_status_t (*allocate_pages
)(int, int, unsigned long,
260 efi_physical_addr_t
*);
261 efi_status_t (*free_pages
)(efi_physical_addr_t
, unsigned long);
262 efi_status_t (*get_memory_map
)(unsigned long *, void *, unsigned long *,
263 unsigned long *, u32
*);
264 efi_status_t (*allocate_pool
)(int, unsigned long, void **);
265 efi_status_t (*free_pool
)(void *);
268 void *wait_for_event
;
272 void *install_protocol_interface
;
273 void *reinstall_protocol_interface
;
274 void *uninstall_protocol_interface
;
275 efi_status_t (*handle_protocol
)(efi_handle_t
, efi_guid_t
*, void **);
277 void *register_protocol_notify
;
279 void *locate_device_path
;
280 void *install_configuration_table
;
285 efi_status_t (*exit_boot_services
)(efi_handle_t
, unsigned long);
286 void *get_next_monotonic_count
;
288 void *set_watchdog_timer
;
289 void *connect_controller
;
290 void *disconnect_controller
;
292 void *close_protocol
;
293 void *open_protocol_information
;
294 void *protocols_per_handle
;
295 void *locate_handle_buffer
;
296 void *locate_protocol
;
297 void *install_multiple_protocol_interfaces
;
298 void *uninstall_multiple_protocol_interfaces
;
299 void *calculate_crc32
;
302 void *create_event_ex
;
303 } efi_boot_services_t
;
310 EfiPciIoWidthFifoUint8
,
311 EfiPciIoWidthFifoUint16
,
312 EfiPciIoWidthFifoUint32
,
313 EfiPciIoWidthFifoUint64
,
314 EfiPciIoWidthFillUint8
,
315 EfiPciIoWidthFillUint16
,
316 EfiPciIoWidthFillUint32
,
317 EfiPciIoWidthFillUint64
,
319 } EFI_PCI_IO_PROTOCOL_WIDTH
;
322 EfiPciIoAttributeOperationGet
,
323 EfiPciIoAttributeOperationSet
,
324 EfiPciIoAttributeOperationEnable
,
325 EfiPciIoAttributeOperationDisable
,
326 EfiPciIoAttributeOperationSupported
,
327 EfiPciIoAttributeOperationMaximum
328 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION
;
333 } efi_pci_io_protocol_access_32_t
;
338 } efi_pci_io_protocol_access_64_t
;
343 } efi_pci_io_protocol_access_t
;
348 efi_pci_io_protocol_access_32_t mem
;
349 efi_pci_io_protocol_access_32_t io
;
350 efi_pci_io_protocol_access_32_t pci
;
359 u32 get_bar_attributes
;
360 u32 set_bar_attributes
;
363 } efi_pci_io_protocol_32
;
368 efi_pci_io_protocol_access_64_t mem
;
369 efi_pci_io_protocol_access_64_t io
;
370 efi_pci_io_protocol_access_64_t pci
;
379 u64 get_bar_attributes
;
380 u64 set_bar_attributes
;
383 } efi_pci_io_protocol_64
;
388 efi_pci_io_protocol_access_t mem
;
389 efi_pci_io_protocol_access_t io
;
390 efi_pci_io_protocol_access_t pci
;
394 void *allocate_buffer
;
399 void *get_bar_attributes
;
400 void *set_bar_attributes
;
403 } efi_pci_io_protocol
;
405 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
406 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
407 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
408 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
409 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
410 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
411 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
412 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
413 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
414 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
415 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
416 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
417 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
418 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
419 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
420 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
421 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
422 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
423 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
426 * Types and defines for EFI ResetSystem
428 #define EFI_RESET_COLD 0
429 #define EFI_RESET_WARM 1
430 #define EFI_RESET_SHUTDOWN 2
433 * EFI Runtime Services table
435 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
436 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
444 u32 set_virtual_address_map
;
447 u32 get_next_variable
;
449 u32 get_next_high_mono_count
;
452 u32 query_capsule_caps
;
453 u32 query_variable_info
;
454 } efi_runtime_services_32_t
;
462 u64 set_virtual_address_map
;
465 u64 get_next_variable
;
467 u64 get_next_high_mono_count
;
470 u64 query_capsule_caps
;
471 u64 query_variable_info
;
472 } efi_runtime_services_64_t
;
478 void *get_wakeup_time
;
479 void *set_wakeup_time
;
480 void *set_virtual_address_map
;
481 void *convert_pointer
;
483 void *get_next_variable
;
485 void *get_next_high_mono_count
;
487 void *update_capsule
;
488 void *query_capsule_caps
;
489 void *query_variable_info
;
490 } efi_runtime_services_t
;
492 typedef efi_status_t
efi_get_time_t (efi_time_t
*tm
, efi_time_cap_t
*tc
);
493 typedef efi_status_t
efi_set_time_t (efi_time_t
*tm
);
494 typedef efi_status_t
efi_get_wakeup_time_t (efi_bool_t
*enabled
, efi_bool_t
*pending
,
496 typedef efi_status_t
efi_set_wakeup_time_t (efi_bool_t enabled
, efi_time_t
*tm
);
497 typedef efi_status_t
efi_get_variable_t (efi_char16_t
*name
, efi_guid_t
*vendor
, u32
*attr
,
498 unsigned long *data_size
, void *data
);
499 typedef efi_status_t
efi_get_next_variable_t (unsigned long *name_size
, efi_char16_t
*name
,
501 typedef efi_status_t
efi_set_variable_t (efi_char16_t
*name
, efi_guid_t
*vendor
,
502 u32 attr
, unsigned long data_size
,
504 typedef efi_status_t
efi_get_next_high_mono_count_t (u32
*count
);
505 typedef void efi_reset_system_t (int reset_type
, efi_status_t status
,
506 unsigned long data_size
, efi_char16_t
*data
);
507 typedef efi_status_t
efi_set_virtual_address_map_t (unsigned long memory_map_size
,
508 unsigned long descriptor_size
,
509 u32 descriptor_version
,
510 efi_memory_desc_t
*virtual_map
);
511 typedef efi_status_t
efi_query_variable_info_t(u32 attr
,
513 u64
*remaining_space
,
514 u64
*max_variable_size
);
515 typedef efi_status_t
efi_update_capsule_t(efi_capsule_header_t
**capsules
,
517 unsigned long sg_list
);
518 typedef efi_status_t
efi_query_capsule_caps_t(efi_capsule_header_t
**capsules
,
522 typedef efi_status_t
efi_query_variable_store_t(u32 attributes
, unsigned long size
);
525 * EFI Configuration Table and GUID definitions
528 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
530 #define MPS_TABLE_GUID \
531 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
533 #define ACPI_TABLE_GUID \
534 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
536 #define ACPI_20_TABLE_GUID \
537 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
539 #define SMBIOS_TABLE_GUID \
540 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
542 #define SAL_SYSTEM_TABLE_GUID \
543 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
545 #define HCDP_TABLE_GUID \
546 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
548 #define UGA_IO_PROTOCOL_GUID \
549 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
551 #define EFI_GLOBAL_VARIABLE_GUID \
552 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
554 #define UV_SYSTEM_TABLE_GUID \
555 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
557 #define LINUX_EFI_CRASH_GUID \
558 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
560 #define LOADED_IMAGE_PROTOCOL_GUID \
561 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
563 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
564 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
566 #define EFI_UGA_PROTOCOL_GUID \
567 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
569 #define EFI_PCI_IO_PROTOCOL_GUID \
570 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
572 #define EFI_FILE_INFO_ID \
573 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
575 #define EFI_FILE_SYSTEM_GUID \
576 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
581 } efi_config_table_64_t
;
586 } efi_config_table_32_t
;
591 } efi_config_table_t
;
597 } efi_config_table_type_t
;
599 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
601 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
602 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
603 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
604 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
605 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
606 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
610 u64 fw_vendor
; /* physical addr of CHAR16 vendor string */
624 } efi_system_table_64_t
;
628 u32 fw_vendor
; /* physical addr of CHAR16 vendor string */
640 } efi_system_table_32_t
;
644 unsigned long fw_vendor
; /* physical addr of CHAR16 vendor string */
646 unsigned long con_in_handle
;
647 unsigned long con_in
;
648 unsigned long con_out_handle
;
649 unsigned long con_out
;
650 unsigned long stderr_handle
;
651 unsigned long stderr
;
652 efi_runtime_services_t
*runtime
;
653 efi_boot_services_t
*boottime
;
654 unsigned long nr_tables
;
655 unsigned long tables
;
656 } efi_system_table_t
;
658 struct efi_memory_map
{
663 unsigned long desc_version
;
664 unsigned long desc_size
;
674 u32 load_options_size
;
677 __aligned_u64 image_size
;
678 unsigned int image_code_type
;
679 unsigned int image_data_type
;
680 unsigned long unload
;
681 } efi_loaded_image_32_t
;
690 u32 load_options_size
;
693 __aligned_u64 image_size
;
694 unsigned int image_code_type
;
695 unsigned int image_data_type
;
696 unsigned long unload
;
697 } efi_loaded_image_64_t
;
702 efi_system_table_t
*system_table
;
706 u32 load_options_size
;
709 __aligned_u64 image_size
;
710 unsigned int image_code_type
;
711 unsigned int image_data_type
;
712 unsigned long unload
;
713 } efi_loaded_image_t
;
720 efi_time_t create_time
;
721 efi_time_t last_access_time
;
722 efi_time_t modification_time
;
723 __aligned_u64 attribute
;
724 efi_char16_t filename
[1];
739 } efi_file_handle_32_t
;
753 } efi_file_handle_64_t
;
755 typedef struct _efi_file_handle
{
757 efi_status_t (*open
)(struct _efi_file_handle
*,
758 struct _efi_file_handle
**,
759 efi_char16_t
*, u64
, u64
);
760 efi_status_t (*close
)(struct _efi_file_handle
*);
762 efi_status_t (*read
)(struct _efi_file_handle
*, unsigned long *,
767 efi_status_t (*get_info
)(struct _efi_file_handle
*, efi_guid_t
*,
768 unsigned long *, void *);
773 typedef struct _efi_file_io_interface
{
775 int (*open_volume
)(struct _efi_file_io_interface
*,
776 efi_file_handle_t
**);
777 } efi_file_io_interface_t
;
779 #define EFI_FILE_MODE_READ 0x0000000000000001
780 #define EFI_FILE_MODE_WRITE 0x0000000000000002
781 #define EFI_FILE_MODE_CREATE 0x8000000000000000
783 #define EFI_INVALID_TABLE_ADDR (~0UL)
786 * All runtime access to EFI goes through this structure:
789 efi_system_table_t
*systab
; /* EFI system table */
790 unsigned int runtime_version
; /* Runtime services version */
791 unsigned long mps
; /* MPS table */
792 unsigned long acpi
; /* ACPI table (IA64 ext 0.71) */
793 unsigned long acpi20
; /* ACPI table (ACPI 2.0) */
794 unsigned long smbios
; /* SM BIOS table */
795 unsigned long sal_systab
; /* SAL system table */
796 unsigned long boot_info
; /* boot info table */
797 unsigned long hcdp
; /* HCDP table */
798 unsigned long uga
; /* UGA table */
799 unsigned long uv_systab
; /* UV system table */
800 unsigned long fw_vendor
; /* fw_vendor */
801 unsigned long runtime
; /* runtime table */
802 unsigned long config_table
; /* config tables */
803 efi_get_time_t
*get_time
;
804 efi_set_time_t
*set_time
;
805 efi_get_wakeup_time_t
*get_wakeup_time
;
806 efi_set_wakeup_time_t
*set_wakeup_time
;
807 efi_get_variable_t
*get_variable
;
808 efi_get_next_variable_t
*get_next_variable
;
809 efi_set_variable_t
*set_variable
;
810 efi_query_variable_info_t
*query_variable_info
;
811 efi_update_capsule_t
*update_capsule
;
812 efi_query_capsule_caps_t
*query_capsule_caps
;
813 efi_get_next_high_mono_count_t
*get_next_high_mono_count
;
814 efi_reset_system_t
*reset_system
;
815 efi_set_virtual_address_map_t
*set_virtual_address_map
;
816 struct efi_memory_map
*memmap
;
821 efi_guidcmp (efi_guid_t left
, efi_guid_t right
)
823 return memcmp(&left
, &right
, sizeof (efi_guid_t
));
827 efi_guid_unparse(efi_guid_t
*guid
, char *out
)
829 sprintf(out
, "%pUl", guid
->b
);
833 extern void efi_init (void);
834 extern void *efi_get_pal_addr (void);
835 extern void efi_map_pal_code (void);
836 extern void efi_memmap_walk (efi_freemem_callback_t callback
, void *arg
);
837 extern void efi_gettimeofday (struct timespec
*ts
);
838 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
840 extern void efi_late_init(void);
841 extern void efi_free_boot_services(void);
842 extern efi_status_t
efi_query_variable_store(u32 attributes
, unsigned long size
);
844 static inline void efi_late_init(void) {}
845 static inline void efi_free_boot_services(void) {}
847 static inline efi_status_t
efi_query_variable_store(u32 attributes
, unsigned long size
)
852 extern void __iomem
*efi_lookup_mapped_addr(u64 phys_addr
);
853 extern int efi_config_init(efi_config_table_type_t
*arch_tables
);
854 extern u64
efi_get_iobase (void);
855 extern u32
efi_mem_type (unsigned long phys_addr
);
856 extern u64
efi_mem_attributes (unsigned long phys_addr
);
857 extern u64
efi_mem_attribute (unsigned long phys_addr
, unsigned long size
);
858 extern int __init
efi_uart_console_only (void);
859 extern void efi_initialize_iomem_resources(struct resource
*code_resource
,
860 struct resource
*data_resource
, struct resource
*bss_resource
);
861 extern void efi_get_time(struct timespec
*now
);
862 extern int efi_set_rtc_mmss(const struct timespec
*now
);
863 extern void efi_reserve_boot_services(void);
864 extern struct efi_memory_map memmap
;
867 * efi_range_is_wc - check the WC bit on an address range
868 * @start: starting kvirt address
869 * @len: length of range
871 * Consult the EFI memory map and make sure it's ok to set this range WC.
872 * Returns true or false.
874 static inline int efi_range_is_wc(unsigned long start
, unsigned long len
)
878 for (i
= 0; i
< len
; i
+= (1UL << EFI_PAGE_SHIFT
)) {
879 unsigned long paddr
= __pa(start
+ i
);
880 if (!(efi_mem_attributes(paddr
) & EFI_MEMORY_WC
))
883 /* The range checked out */
887 #ifdef CONFIG_EFI_PCDP
888 extern int __init
efi_setup_pcdp_console(char *);
892 * We play games with efi_enabled so that the compiler will, if
893 * possible, remove EFI-related code altogether.
895 #define EFI_BOOT 0 /* Were we booted from EFI? */
896 #define EFI_SYSTEM_TABLES 1 /* Can we use EFI system tables? */
897 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
898 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
899 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
900 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
901 #define EFI_ARCH_1 6 /* First arch-specific bit */
905 * Test whether the above EFI_* bits are enabled.
907 static inline bool efi_enabled(int feature
)
909 return test_bit(feature
, &efi
.flags
) != 0;
912 static inline bool efi_enabled(int feature
)
919 * Variable Attributes
921 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
922 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
923 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
924 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
925 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
926 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
927 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
929 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
930 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
931 EFI_VARIABLE_RUNTIME_ACCESS | \
932 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
933 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
934 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
935 EFI_VARIABLE_APPEND_WRITE)
937 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
938 * not including trailing NUL
940 #define EFI_VARIABLE_GUID_LEN 36
943 * The type of search to perform when calling boottime->locate_handle
945 #define EFI_LOCATE_ALL_HANDLES 0
946 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
947 #define EFI_LOCATE_BY_PROTOCOL 2
950 * EFI Device Path information
952 #define EFI_DEV_HW 0x01
953 #define EFI_DEV_PCI 1
954 #define EFI_DEV_PCCARD 2
955 #define EFI_DEV_MEM_MAPPED 3
956 #define EFI_DEV_VENDOR 4
957 #define EFI_DEV_CONTROLLER 5
958 #define EFI_DEV_ACPI 0x02
959 #define EFI_DEV_BASIC_ACPI 1
960 #define EFI_DEV_EXPANDED_ACPI 2
961 #define EFI_DEV_MSG 0x03
962 #define EFI_DEV_MSG_ATAPI 1
963 #define EFI_DEV_MSG_SCSI 2
964 #define EFI_DEV_MSG_FC 3
965 #define EFI_DEV_MSG_1394 4
966 #define EFI_DEV_MSG_USB 5
967 #define EFI_DEV_MSG_USB_CLASS 15
968 #define EFI_DEV_MSG_I20 6
969 #define EFI_DEV_MSG_MAC 11
970 #define EFI_DEV_MSG_IPV4 12
971 #define EFI_DEV_MSG_IPV6 13
972 #define EFI_DEV_MSG_INFINIBAND 9
973 #define EFI_DEV_MSG_UART 14
974 #define EFI_DEV_MSG_VENDOR 10
975 #define EFI_DEV_MEDIA 0x04
976 #define EFI_DEV_MEDIA_HARD_DRIVE 1
977 #define EFI_DEV_MEDIA_CDROM 2
978 #define EFI_DEV_MEDIA_VENDOR 3
979 #define EFI_DEV_MEDIA_FILE 4
980 #define EFI_DEV_MEDIA_PROTOCOL 5
981 #define EFI_DEV_BIOS_BOOT 0x05
982 #define EFI_DEV_END_PATH 0x7F
983 #define EFI_DEV_END_PATH2 0xFF
984 #define EFI_DEV_END_INSTANCE 0x01
985 #define EFI_DEV_END_ENTIRE 0xFF
987 struct efi_generic_dev_path
{
991 } __attribute ((packed
));
993 static inline void memrange_efi_to_native(u64
*addr
, u64
*npages
)
995 *npages
= PFN_UP(*addr
+ (*npages
<<EFI_PAGE_SHIFT
)) - PFN_DOWN(*addr
);
1000 * EFI Variable support.
1002 * Different firmware drivers can expose their EFI-like variables using
1006 struct efivar_operations
{
1007 efi_get_variable_t
*get_variable
;
1008 efi_get_next_variable_t
*get_next_variable
;
1009 efi_set_variable_t
*set_variable
;
1010 efi_query_variable_store_t
*query_variable_store
;
1015 * ->lock protects two things:
1016 * 1) ->list - adds, removals, reads, writes
1017 * 2) ops.[gs]et_variable() calls.
1018 * It must not be held when creating sysfs entries or calling kmalloc.
1019 * ops.get_next_variable() is only called from register_efivars()
1020 * or efivar_update_sysfs_entries(),
1021 * which is protected by the BKL, so that path is safe.
1025 struct kobject
*kobject
;
1026 const struct efivar_operations
*ops
;
1030 * The maximum size of VariableName + Data = 1024
1031 * Therefore, it's reasonable to save that much
1032 * space in each part of the structure,
1033 * and we use a page for reading/writing.
1036 struct efi_variable
{
1037 efi_char16_t VariableName
[1024/sizeof(efi_char16_t
)];
1038 efi_guid_t VendorGuid
;
1039 unsigned long DataSize
;
1041 efi_status_t Status
;
1043 } __attribute__((packed
));
1045 struct efivar_entry
{
1046 struct efi_variable var
;
1047 struct list_head list
;
1048 struct kobject kobj
;
1053 struct efi_simple_text_output_protocol_32
{
1059 struct efi_simple_text_output_protocol_64
{
1065 struct efi_simple_text_output_protocol
{
1067 efi_status_t (*output_string
)(void *, void *);
1071 extern struct list_head efivar_sysfs_list
;
1074 efivar_unregister(struct efivar_entry
*var
)
1076 kobject_put(&var
->kobj
);
1079 int efivars_register(struct efivars
*efivars
,
1080 const struct efivar_operations
*ops
,
1081 struct kobject
*kobject
);
1082 int efivars_unregister(struct efivars
*efivars
);
1083 struct kobject
*efivars_kobject(void);
1085 int efivar_init(int (*func
)(efi_char16_t
*, efi_guid_t
, unsigned long, void *),
1086 void *data
, bool atomic
, bool duplicates
,
1087 struct list_head
*head
);
1089 void efivar_entry_add(struct efivar_entry
*entry
, struct list_head
*head
);
1090 void efivar_entry_remove(struct efivar_entry
*entry
);
1092 int __efivar_entry_delete(struct efivar_entry
*entry
);
1093 int efivar_entry_delete(struct efivar_entry
*entry
);
1095 int efivar_entry_size(struct efivar_entry
*entry
, unsigned long *size
);
1096 int __efivar_entry_get(struct efivar_entry
*entry
, u32
*attributes
,
1097 unsigned long *size
, void *data
);
1098 int efivar_entry_get(struct efivar_entry
*entry
, u32
*attributes
,
1099 unsigned long *size
, void *data
);
1100 int efivar_entry_set(struct efivar_entry
*entry
, u32 attributes
,
1101 unsigned long size
, void *data
, struct list_head
*head
);
1102 int efivar_entry_set_get_size(struct efivar_entry
*entry
, u32 attributes
,
1103 unsigned long *size
, void *data
, bool *set
);
1104 int efivar_entry_set_safe(efi_char16_t
*name
, efi_guid_t vendor
, u32 attributes
,
1105 bool block
, unsigned long size
, void *data
);
1107 void efivar_entry_iter_begin(void);
1108 void efivar_entry_iter_end(void);
1110 int __efivar_entry_iter(int (*func
)(struct efivar_entry
*, void *),
1111 struct list_head
*head
, void *data
,
1112 struct efivar_entry
**prev
);
1113 int efivar_entry_iter(int (*func
)(struct efivar_entry
*, void *),
1114 struct list_head
*head
, void *data
);
1116 struct efivar_entry
*efivar_entry_find(efi_char16_t
*name
, efi_guid_t guid
,
1117 struct list_head
*head
, bool remove
);
1119 bool efivar_validate(struct efi_variable
*var
, u8
*data
, unsigned long len
);
1121 extern struct work_struct efivar_work
;
1122 void efivar_run_worker(void);
1124 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
1125 int efivars_sysfs_init(void);
1127 #define EFIVARS_DATA_SIZE_MAX 1024
1129 #endif /* CONFIG_EFI_VARS */
1131 #ifdef CONFIG_EFI_RUNTIME_MAP
1132 int efi_runtime_map_init(struct kobject
*);
1133 void efi_runtime_map_setup(void *, int, u32
);
1135 static inline int efi_runtime_map_init(struct kobject
*kobj
)
1141 efi_runtime_map_setup(void *map
, int nr_entries
, u32 desc_size
) {}
1144 #endif /* _LINUX_EFI_H */