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
157 * EFI Boot Services table
163 efi_status_t (*allocate_pages
)(int, int, unsigned long,
164 efi_physical_addr_t
*);
165 efi_status_t (*free_pages
)(efi_physical_addr_t
, unsigned long);
166 efi_status_t (*get_memory_map
)(unsigned long *, void *, unsigned long *,
167 unsigned long *, u32
*);
168 efi_status_t (*allocate_pool
)(int, unsigned long, void **);
169 efi_status_t (*free_pool
)(void *);
172 void *wait_for_event
;
176 void *install_protocol_interface
;
177 void *reinstall_protocol_interface
;
178 void *uninstall_protocol_interface
;
179 efi_status_t (*handle_protocol
)(efi_handle_t
, efi_guid_t
*, void **);
181 void *register_protocol_notify
;
183 void *locate_device_path
;
184 void *install_configuration_table
;
189 efi_status_t (*exit_boot_services
)(efi_handle_t
, unsigned long);
190 void *get_next_monotonic_count
;
192 void *set_watchdog_timer
;
193 void *connect_controller
;
194 void *disconnect_controller
;
196 void *close_protocol
;
197 void *open_protocol_information
;
198 void *protocols_per_handle
;
199 void *locate_handle_buffer
;
200 void *locate_protocol
;
201 void *install_multiple_protocol_interfaces
;
202 void *uninstall_multiple_protocol_interfaces
;
203 void *calculate_crc32
;
206 void *create_event_ex
;
207 } efi_boot_services_t
;
214 EfiPciIoWidthFifoUint8
,
215 EfiPciIoWidthFifoUint16
,
216 EfiPciIoWidthFifoUint32
,
217 EfiPciIoWidthFifoUint64
,
218 EfiPciIoWidthFillUint8
,
219 EfiPciIoWidthFillUint16
,
220 EfiPciIoWidthFillUint32
,
221 EfiPciIoWidthFillUint64
,
223 } EFI_PCI_IO_PROTOCOL_WIDTH
;
226 EfiPciIoAttributeOperationGet
,
227 EfiPciIoAttributeOperationSet
,
228 EfiPciIoAttributeOperationEnable
,
229 EfiPciIoAttributeOperationDisable
,
230 EfiPciIoAttributeOperationSupported
,
231 EfiPciIoAttributeOperationMaximum
232 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION
;
238 } efi_pci_io_protocol_access_t
;
243 efi_pci_io_protocol_access_t mem
;
244 efi_pci_io_protocol_access_t io
;
245 efi_pci_io_protocol_access_t pci
;
249 void *allocate_buffer
;
254 void *get_bar_attributes
;
255 void *set_bar_attributes
;
258 } efi_pci_io_protocol
;
260 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
261 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
262 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
263 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
264 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
265 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
266 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
267 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
268 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
269 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
270 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
271 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
272 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
273 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
274 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
275 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
276 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
277 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
278 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
281 * Types and defines for EFI ResetSystem
283 #define EFI_RESET_COLD 0
284 #define EFI_RESET_WARM 1
285 #define EFI_RESET_SHUTDOWN 2
288 * EFI Runtime Services table
290 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
291 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
297 void *get_wakeup_time
;
298 void *set_wakeup_time
;
299 void *set_virtual_address_map
;
300 void *convert_pointer
;
302 void *get_next_variable
;
304 void *get_next_high_mono_count
;
306 void *update_capsule
;
307 void *query_capsule_caps
;
308 void *query_variable_info
;
309 } efi_runtime_services_t
;
311 typedef efi_status_t
efi_get_time_t (efi_time_t
*tm
, efi_time_cap_t
*tc
);
312 typedef efi_status_t
efi_set_time_t (efi_time_t
*tm
);
313 typedef efi_status_t
efi_get_wakeup_time_t (efi_bool_t
*enabled
, efi_bool_t
*pending
,
315 typedef efi_status_t
efi_set_wakeup_time_t (efi_bool_t enabled
, efi_time_t
*tm
);
316 typedef efi_status_t
efi_get_variable_t (efi_char16_t
*name
, efi_guid_t
*vendor
, u32
*attr
,
317 unsigned long *data_size
, void *data
);
318 typedef efi_status_t
efi_get_next_variable_t (unsigned long *name_size
, efi_char16_t
*name
,
320 typedef efi_status_t
efi_set_variable_t (efi_char16_t
*name
, efi_guid_t
*vendor
,
321 u32 attr
, unsigned long data_size
,
323 typedef efi_status_t
efi_get_next_high_mono_count_t (u32
*count
);
324 typedef void efi_reset_system_t (int reset_type
, efi_status_t status
,
325 unsigned long data_size
, efi_char16_t
*data
);
326 typedef efi_status_t
efi_set_virtual_address_map_t (unsigned long memory_map_size
,
327 unsigned long descriptor_size
,
328 u32 descriptor_version
,
329 efi_memory_desc_t
*virtual_map
);
330 typedef efi_status_t
efi_query_variable_info_t(u32 attr
,
332 u64
*remaining_space
,
333 u64
*max_variable_size
);
334 typedef efi_status_t
efi_update_capsule_t(efi_capsule_header_t
**capsules
,
336 unsigned long sg_list
);
337 typedef efi_status_t
efi_query_capsule_caps_t(efi_capsule_header_t
**capsules
,
341 typedef efi_status_t
efi_query_variable_store_t(u32 attributes
, unsigned long size
);
344 * EFI Configuration Table and GUID definitions
347 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
349 #define MPS_TABLE_GUID \
350 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
352 #define ACPI_TABLE_GUID \
353 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
355 #define ACPI_20_TABLE_GUID \
356 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
358 #define SMBIOS_TABLE_GUID \
359 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
361 #define SAL_SYSTEM_TABLE_GUID \
362 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
364 #define HCDP_TABLE_GUID \
365 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
367 #define UGA_IO_PROTOCOL_GUID \
368 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
370 #define EFI_GLOBAL_VARIABLE_GUID \
371 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
373 #define UV_SYSTEM_TABLE_GUID \
374 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
376 #define LINUX_EFI_CRASH_GUID \
377 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
379 #define LOADED_IMAGE_PROTOCOL_GUID \
380 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
382 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
383 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
385 #define EFI_UGA_PROTOCOL_GUID \
386 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
388 #define EFI_PCI_IO_PROTOCOL_GUID \
389 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
391 #define EFI_FILE_INFO_ID \
392 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
394 #define EFI_FILE_SYSTEM_GUID \
395 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
400 } efi_config_table_64_t
;
405 } efi_config_table_32_t
;
410 } efi_config_table_t
;
416 } efi_config_table_type_t
;
418 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
420 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
421 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
422 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
423 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
424 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
425 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
429 u64 fw_vendor
; /* physical addr of CHAR16 vendor string */
443 } efi_system_table_64_t
;
447 u32 fw_vendor
; /* physical addr of CHAR16 vendor string */
459 } efi_system_table_32_t
;
463 unsigned long fw_vendor
; /* physical addr of CHAR16 vendor string */
465 unsigned long con_in_handle
;
466 unsigned long con_in
;
467 unsigned long con_out_handle
;
468 unsigned long con_out
;
469 unsigned long stderr_handle
;
470 unsigned long stderr
;
471 efi_runtime_services_t
*runtime
;
472 efi_boot_services_t
*boottime
;
473 unsigned long nr_tables
;
474 unsigned long tables
;
475 } efi_system_table_t
;
477 struct efi_memory_map
{
482 unsigned long desc_version
;
483 unsigned long desc_size
;
489 efi_system_table_t
*system_table
;
493 u32 load_options_size
;
496 __aligned_u64 image_size
;
497 unsigned int image_code_type
;
498 unsigned int image_data_type
;
499 unsigned long unload
;
500 } efi_loaded_image_t
;
507 efi_time_t create_time
;
508 efi_time_t last_access_time
;
509 efi_time_t modification_time
;
510 __aligned_u64 attribute
;
511 efi_char16_t filename
[1];
514 typedef struct _efi_file_handle
{
516 efi_status_t (*open
)(struct _efi_file_handle
*,
517 struct _efi_file_handle
**,
518 efi_char16_t
*, u64
, u64
);
519 efi_status_t (*close
)(struct _efi_file_handle
*);
521 efi_status_t (*read
)(struct _efi_file_handle
*, unsigned long *,
526 efi_status_t (*get_info
)(struct _efi_file_handle
*, efi_guid_t
*,
527 unsigned long *, void *);
532 typedef struct _efi_file_io_interface
{
534 int (*open_volume
)(struct _efi_file_io_interface
*,
535 efi_file_handle_t
**);
536 } efi_file_io_interface_t
;
538 #define EFI_FILE_MODE_READ 0x0000000000000001
539 #define EFI_FILE_MODE_WRITE 0x0000000000000002
540 #define EFI_FILE_MODE_CREATE 0x8000000000000000
542 #define EFI_INVALID_TABLE_ADDR (~0UL)
545 * All runtime access to EFI goes through this structure:
548 efi_system_table_t
*systab
; /* EFI system table */
549 unsigned int runtime_version
; /* Runtime services version */
550 unsigned long mps
; /* MPS table */
551 unsigned long acpi
; /* ACPI table (IA64 ext 0.71) */
552 unsigned long acpi20
; /* ACPI table (ACPI 2.0) */
553 unsigned long smbios
; /* SM BIOS table */
554 unsigned long sal_systab
; /* SAL system table */
555 unsigned long boot_info
; /* boot info table */
556 unsigned long hcdp
; /* HCDP table */
557 unsigned long uga
; /* UGA table */
558 unsigned long uv_systab
; /* UV system table */
559 unsigned long fw_vendor
; /* fw_vendor */
560 unsigned long runtime
; /* runtime table */
561 unsigned long config_table
; /* config tables */
562 efi_get_time_t
*get_time
;
563 efi_set_time_t
*set_time
;
564 efi_get_wakeup_time_t
*get_wakeup_time
;
565 efi_set_wakeup_time_t
*set_wakeup_time
;
566 efi_get_variable_t
*get_variable
;
567 efi_get_next_variable_t
*get_next_variable
;
568 efi_set_variable_t
*set_variable
;
569 efi_query_variable_info_t
*query_variable_info
;
570 efi_update_capsule_t
*update_capsule
;
571 efi_query_capsule_caps_t
*query_capsule_caps
;
572 efi_get_next_high_mono_count_t
*get_next_high_mono_count
;
573 efi_reset_system_t
*reset_system
;
574 efi_set_virtual_address_map_t
*set_virtual_address_map
;
575 struct efi_memory_map
*memmap
;
579 efi_guidcmp (efi_guid_t left
, efi_guid_t right
)
581 return memcmp(&left
, &right
, sizeof (efi_guid_t
));
585 efi_guid_unparse(efi_guid_t
*guid
, char *out
)
587 sprintf(out
, "%pUl", guid
->b
);
591 extern void efi_init (void);
592 extern void *efi_get_pal_addr (void);
593 extern void efi_map_pal_code (void);
594 extern void efi_memmap_walk (efi_freemem_callback_t callback
, void *arg
);
595 extern void efi_gettimeofday (struct timespec
*ts
);
596 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
598 extern void efi_late_init(void);
599 extern void efi_free_boot_services(void);
600 extern efi_status_t
efi_query_variable_store(u32 attributes
, unsigned long size
);
602 static inline void efi_late_init(void) {}
603 static inline void efi_free_boot_services(void) {}
605 static inline efi_status_t
efi_query_variable_store(u32 attributes
, unsigned long size
)
610 extern void __iomem
*efi_lookup_mapped_addr(u64 phys_addr
);
611 extern int efi_config_init(efi_config_table_type_t
*arch_tables
);
612 extern u64
efi_get_iobase (void);
613 extern u32
efi_mem_type (unsigned long phys_addr
);
614 extern u64
efi_mem_attributes (unsigned long phys_addr
);
615 extern u64
efi_mem_attribute (unsigned long phys_addr
, unsigned long size
);
616 extern int __init
efi_uart_console_only (void);
617 extern void efi_initialize_iomem_resources(struct resource
*code_resource
,
618 struct resource
*data_resource
, struct resource
*bss_resource
);
619 extern void efi_get_time(struct timespec
*now
);
620 extern int efi_set_rtc_mmss(const struct timespec
*now
);
621 extern void efi_reserve_boot_services(void);
622 extern struct efi_memory_map memmap
;
625 * efi_range_is_wc - check the WC bit on an address range
626 * @start: starting kvirt address
627 * @len: length of range
629 * Consult the EFI memory map and make sure it's ok to set this range WC.
630 * Returns true or false.
632 static inline int efi_range_is_wc(unsigned long start
, unsigned long len
)
636 for (i
= 0; i
< len
; i
+= (1UL << EFI_PAGE_SHIFT
)) {
637 unsigned long paddr
= __pa(start
+ i
);
638 if (!(efi_mem_attributes(paddr
) & EFI_MEMORY_WC
))
641 /* The range checked out */
645 #ifdef CONFIG_EFI_PCDP
646 extern int __init
efi_setup_pcdp_console(char *);
650 * We play games with efi_enabled so that the compiler will, if
651 * possible, remove EFI-related code altogether.
653 #define EFI_BOOT 0 /* Were we booted from EFI? */
654 #define EFI_SYSTEM_TABLES 1 /* Can we use EFI system tables? */
655 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
656 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
657 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
658 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
659 #define EFI_ARCH_1 6 /* First arch-specific bit */
663 extern int efi_enabled(int facility
);
665 static inline int efi_enabled(int facility
)
671 static inline int efi_enabled(int facility
)
678 * Variable Attributes
680 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
681 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
682 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
683 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
684 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
685 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
686 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
688 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
689 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
690 EFI_VARIABLE_RUNTIME_ACCESS | \
691 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
692 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
693 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
694 EFI_VARIABLE_APPEND_WRITE)
696 * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
697 * not including trailing NUL
699 #define EFI_VARIABLE_GUID_LEN 36
702 * The type of search to perform when calling boottime->locate_handle
704 #define EFI_LOCATE_ALL_HANDLES 0
705 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
706 #define EFI_LOCATE_BY_PROTOCOL 2
709 * EFI Device Path information
711 #define EFI_DEV_HW 0x01
712 #define EFI_DEV_PCI 1
713 #define EFI_DEV_PCCARD 2
714 #define EFI_DEV_MEM_MAPPED 3
715 #define EFI_DEV_VENDOR 4
716 #define EFI_DEV_CONTROLLER 5
717 #define EFI_DEV_ACPI 0x02
718 #define EFI_DEV_BASIC_ACPI 1
719 #define EFI_DEV_EXPANDED_ACPI 2
720 #define EFI_DEV_MSG 0x03
721 #define EFI_DEV_MSG_ATAPI 1
722 #define EFI_DEV_MSG_SCSI 2
723 #define EFI_DEV_MSG_FC 3
724 #define EFI_DEV_MSG_1394 4
725 #define EFI_DEV_MSG_USB 5
726 #define EFI_DEV_MSG_USB_CLASS 15
727 #define EFI_DEV_MSG_I20 6
728 #define EFI_DEV_MSG_MAC 11
729 #define EFI_DEV_MSG_IPV4 12
730 #define EFI_DEV_MSG_IPV6 13
731 #define EFI_DEV_MSG_INFINIBAND 9
732 #define EFI_DEV_MSG_UART 14
733 #define EFI_DEV_MSG_VENDOR 10
734 #define EFI_DEV_MEDIA 0x04
735 #define EFI_DEV_MEDIA_HARD_DRIVE 1
736 #define EFI_DEV_MEDIA_CDROM 2
737 #define EFI_DEV_MEDIA_VENDOR 3
738 #define EFI_DEV_MEDIA_FILE 4
739 #define EFI_DEV_MEDIA_PROTOCOL 5
740 #define EFI_DEV_BIOS_BOOT 0x05
741 #define EFI_DEV_END_PATH 0x7F
742 #define EFI_DEV_END_PATH2 0xFF
743 #define EFI_DEV_END_INSTANCE 0x01
744 #define EFI_DEV_END_ENTIRE 0xFF
746 struct efi_generic_dev_path
{
750 } __attribute ((packed
));
752 static inline void memrange_efi_to_native(u64
*addr
, u64
*npages
)
754 *npages
= PFN_UP(*addr
+ (*npages
<<EFI_PAGE_SHIFT
)) - PFN_DOWN(*addr
);
759 * EFI Variable support.
761 * Different firmware drivers can expose their EFI-like variables using
765 struct efivar_operations
{
766 efi_get_variable_t
*get_variable
;
767 efi_get_next_variable_t
*get_next_variable
;
768 efi_set_variable_t
*set_variable
;
769 efi_query_variable_store_t
*query_variable_store
;
774 * ->lock protects two things:
775 * 1) ->list - adds, removals, reads, writes
776 * 2) ops.[gs]et_variable() calls.
777 * It must not be held when creating sysfs entries or calling kmalloc.
778 * ops.get_next_variable() is only called from register_efivars()
779 * or efivar_update_sysfs_entries(),
780 * which is protected by the BKL, so that path is safe.
784 struct kobject
*kobject
;
785 const struct efivar_operations
*ops
;
789 * The maximum size of VariableName + Data = 1024
790 * Therefore, it's reasonable to save that much
791 * space in each part of the structure,
792 * and we use a page for reading/writing.
795 struct efi_variable
{
796 efi_char16_t VariableName
[1024/sizeof(efi_char16_t
)];
797 efi_guid_t VendorGuid
;
798 unsigned long DataSize
;
802 } __attribute__((packed
));
804 struct efivar_entry
{
805 struct efi_variable var
;
806 struct list_head list
;
813 struct efi_simple_text_output_protocol
{
815 efi_status_t (*output_string
)(void *, void *);
819 extern struct list_head efivar_sysfs_list
;
822 efivar_unregister(struct efivar_entry
*var
)
824 kobject_put(&var
->kobj
);
827 int efivars_register(struct efivars
*efivars
,
828 const struct efivar_operations
*ops
,
829 struct kobject
*kobject
);
830 int efivars_unregister(struct efivars
*efivars
);
831 struct kobject
*efivars_kobject(void);
833 int efivar_init(int (*func
)(efi_char16_t
*, efi_guid_t
, unsigned long, void *),
834 void *data
, bool atomic
, bool duplicates
,
835 struct list_head
*head
);
837 void efivar_entry_add(struct efivar_entry
*entry
, struct list_head
*head
);
838 void efivar_entry_remove(struct efivar_entry
*entry
);
840 int __efivar_entry_delete(struct efivar_entry
*entry
);
841 int efivar_entry_delete(struct efivar_entry
*entry
);
843 int efivar_entry_size(struct efivar_entry
*entry
, unsigned long *size
);
844 int __efivar_entry_get(struct efivar_entry
*entry
, u32
*attributes
,
845 unsigned long *size
, void *data
);
846 int efivar_entry_get(struct efivar_entry
*entry
, u32
*attributes
,
847 unsigned long *size
, void *data
);
848 int efivar_entry_set(struct efivar_entry
*entry
, u32 attributes
,
849 unsigned long size
, void *data
, struct list_head
*head
);
850 int efivar_entry_set_get_size(struct efivar_entry
*entry
, u32 attributes
,
851 unsigned long *size
, void *data
, bool *set
);
852 int efivar_entry_set_safe(efi_char16_t
*name
, efi_guid_t vendor
, u32 attributes
,
853 bool block
, unsigned long size
, void *data
);
855 void efivar_entry_iter_begin(void);
856 void efivar_entry_iter_end(void);
858 int __efivar_entry_iter(int (*func
)(struct efivar_entry
*, void *),
859 struct list_head
*head
, void *data
,
860 struct efivar_entry
**prev
);
861 int efivar_entry_iter(int (*func
)(struct efivar_entry
*, void *),
862 struct list_head
*head
, void *data
);
864 struct efivar_entry
*efivar_entry_find(efi_char16_t
*name
, efi_guid_t guid
,
865 struct list_head
*head
, bool remove
);
867 bool efivar_validate(struct efi_variable
*var
, u8
*data
, unsigned long len
);
869 extern struct work_struct efivar_work
;
870 void efivar_run_worker(void);
872 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
873 int efivars_sysfs_init(void);
875 #define EFIVARS_DATA_SIZE_MAX 1024
877 #endif /* CONFIG_EFI_VARS */
879 #ifdef CONFIG_EFI_RUNTIME_MAP
880 int efi_runtime_map_init(struct kobject
*);
881 void efi_runtime_map_setup(void *, int, u32
);
883 static inline int efi_runtime_map_init(struct kobject
*kobj
)
889 efi_runtime_map_setup(void *map
, int nr_entries
, u32 desc_size
) {}
892 #endif /* _LINUX_EFI_H */