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 */
48 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
50 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
51 (b) & 0xff, ((b) >> 8) & 0xff, \
52 (c) & 0xff, ((c) >> 8) & 0xff, \
53 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
56 * Generic EFI table header
67 * Memory map descriptor:
71 #define EFI_RESERVED_TYPE 0
72 #define EFI_LOADER_CODE 1
73 #define EFI_LOADER_DATA 2
74 #define EFI_BOOT_SERVICES_CODE 3
75 #define EFI_BOOT_SERVICES_DATA 4
76 #define EFI_RUNTIME_SERVICES_CODE 5
77 #define EFI_RUNTIME_SERVICES_DATA 6
78 #define EFI_CONVENTIONAL_MEMORY 7
79 #define EFI_UNUSABLE_MEMORY 8
80 #define EFI_ACPI_RECLAIM_MEMORY 9
81 #define EFI_ACPI_MEMORY_NVS 10
82 #define EFI_MEMORY_MAPPED_IO 11
83 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
84 #define EFI_PAL_CODE 13
85 #define EFI_MAX_MEMORY_TYPE 14
87 /* Attribute values: */
88 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
89 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
90 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
91 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
92 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
93 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
94 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
95 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
96 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
98 #define EFI_PAGE_SHIFT 12
114 } efi_capsule_header_t
;
117 * Allocation types for calls to boottime->allocate_pages.
119 #define EFI_ALLOCATE_ANY_PAGES 0
120 #define EFI_ALLOCATE_MAX_ADDRESS 1
121 #define EFI_ALLOCATE_ADDRESS 2
122 #define EFI_MAX_ALLOCATE_TYPE 3
124 typedef int (*efi_freemem_callback_t
) (u64 start
, u64 end
, void *arg
);
127 * Types and defines for Time Services
129 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
130 #define EFI_TIME_IN_DAYLIGHT 0x2
131 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
154 * EFI Boot Services table
160 void *allocate_pages
;
162 void *get_memory_map
;
167 void *wait_for_event
;
171 void *install_protocol_interface
;
172 void *reinstall_protocol_interface
;
173 void *uninstall_protocol_interface
;
174 void *handle_protocol
;
176 void *register_protocol_notify
;
178 void *locate_device_path
;
179 void *install_configuration_table
;
184 void *exit_boot_services
;
185 void *get_next_monotonic_count
;
187 void *set_watchdog_timer
;
188 void *connect_controller
;
189 void *disconnect_controller
;
191 void *close_protocol
;
192 void *open_protocol_information
;
193 void *protocols_per_handle
;
194 void *locate_handle_buffer
;
195 void *locate_protocol
;
196 void *install_multiple_protocol_interfaces
;
197 void *uninstall_multiple_protocol_interfaces
;
198 void *calculate_crc32
;
201 void *create_event_ex
;
202 } efi_boot_services_t
;
209 EfiPciIoWidthFifoUint8
,
210 EfiPciIoWidthFifoUint16
,
211 EfiPciIoWidthFifoUint32
,
212 EfiPciIoWidthFifoUint64
,
213 EfiPciIoWidthFillUint8
,
214 EfiPciIoWidthFillUint16
,
215 EfiPciIoWidthFillUint32
,
216 EfiPciIoWidthFillUint64
,
218 } EFI_PCI_IO_PROTOCOL_WIDTH
;
221 EfiPciIoAttributeOperationGet
,
222 EfiPciIoAttributeOperationSet
,
223 EfiPciIoAttributeOperationEnable
,
224 EfiPciIoAttributeOperationDisable
,
225 EfiPciIoAttributeOperationSupported
,
226 EfiPciIoAttributeOperationMaximum
227 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION
;
233 } efi_pci_io_protocol_access_t
;
238 efi_pci_io_protocol_access_t mem
;
239 efi_pci_io_protocol_access_t io
;
240 efi_pci_io_protocol_access_t pci
;
244 void *allocate_buffer
;
249 void *get_bar_attributes
;
250 void *set_bar_attributes
;
253 } efi_pci_io_protocol
;
255 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
256 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
257 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
258 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
259 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
260 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
261 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
262 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
263 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
264 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
265 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
266 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
267 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
268 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
269 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
270 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
271 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
272 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
273 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
276 * Types and defines for EFI ResetSystem
278 #define EFI_RESET_COLD 0
279 #define EFI_RESET_WARM 1
280 #define EFI_RESET_SHUTDOWN 2
283 * EFI Runtime Services table
285 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
286 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
290 unsigned long get_time
;
291 unsigned long set_time
;
292 unsigned long get_wakeup_time
;
293 unsigned long set_wakeup_time
;
294 unsigned long set_virtual_address_map
;
295 unsigned long convert_pointer
;
296 unsigned long get_variable
;
297 unsigned long get_next_variable
;
298 unsigned long set_variable
;
299 unsigned long get_next_high_mono_count
;
300 unsigned long reset_system
;
301 unsigned long update_capsule
;
302 unsigned long query_capsule_caps
;
303 unsigned long query_variable_info
;
304 } efi_runtime_services_t
;
306 typedef efi_status_t
efi_get_time_t (efi_time_t
*tm
, efi_time_cap_t
*tc
);
307 typedef efi_status_t
efi_set_time_t (efi_time_t
*tm
);
308 typedef efi_status_t
efi_get_wakeup_time_t (efi_bool_t
*enabled
, efi_bool_t
*pending
,
310 typedef efi_status_t
efi_set_wakeup_time_t (efi_bool_t enabled
, efi_time_t
*tm
);
311 typedef efi_status_t
efi_get_variable_t (efi_char16_t
*name
, efi_guid_t
*vendor
, u32
*attr
,
312 unsigned long *data_size
, void *data
);
313 typedef efi_status_t
efi_get_next_variable_t (unsigned long *name_size
, efi_char16_t
*name
,
315 typedef efi_status_t
efi_set_variable_t (efi_char16_t
*name
, efi_guid_t
*vendor
,
316 u32 attr
, unsigned long data_size
,
318 typedef efi_status_t
efi_get_next_high_mono_count_t (u32
*count
);
319 typedef void efi_reset_system_t (int reset_type
, efi_status_t status
,
320 unsigned long data_size
, efi_char16_t
*data
);
321 typedef efi_status_t
efi_set_virtual_address_map_t (unsigned long memory_map_size
,
322 unsigned long descriptor_size
,
323 u32 descriptor_version
,
324 efi_memory_desc_t
*virtual_map
);
325 typedef efi_status_t
efi_query_variable_info_t(u32 attr
,
327 u64
*remaining_space
,
328 u64
*max_variable_size
);
329 typedef efi_status_t
efi_update_capsule_t(efi_capsule_header_t
**capsules
,
331 unsigned long sg_list
);
332 typedef efi_status_t
efi_query_capsule_caps_t(efi_capsule_header_t
**capsules
,
338 * EFI Configuration Table and GUID definitions
341 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
343 #define MPS_TABLE_GUID \
344 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
346 #define ACPI_TABLE_GUID \
347 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
349 #define ACPI_20_TABLE_GUID \
350 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
352 #define SMBIOS_TABLE_GUID \
353 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
355 #define SAL_SYSTEM_TABLE_GUID \
356 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
358 #define HCDP_TABLE_GUID \
359 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
361 #define UGA_IO_PROTOCOL_GUID \
362 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
364 #define EFI_GLOBAL_VARIABLE_GUID \
365 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
367 #define UV_SYSTEM_TABLE_GUID \
368 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
370 #define LINUX_EFI_CRASH_GUID \
371 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
373 #define LOADED_IMAGE_PROTOCOL_GUID \
374 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
376 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
377 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
379 #define EFI_UGA_PROTOCOL_GUID \
380 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
382 #define EFI_PCI_IO_PROTOCOL_GUID \
383 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
385 #define EFI_FILE_INFO_ID \
386 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
388 #define EFI_FILE_SYSTEM_GUID \
389 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
394 } efi_config_table_64_t
;
399 } efi_config_table_32_t
;
404 } efi_config_table_t
;
406 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
408 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
409 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
410 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
411 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
412 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
413 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
417 u64 fw_vendor
; /* physical addr of CHAR16 vendor string */
431 } efi_system_table_64_t
;
435 u32 fw_vendor
; /* physical addr of CHAR16 vendor string */
447 } efi_system_table_32_t
;
451 unsigned long fw_vendor
; /* physical addr of CHAR16 vendor string */
453 unsigned long con_in_handle
;
454 unsigned long con_in
;
455 unsigned long con_out_handle
;
456 unsigned long con_out
;
457 unsigned long stderr_handle
;
458 unsigned long stderr
;
459 efi_runtime_services_t
*runtime
;
460 efi_boot_services_t
*boottime
;
461 unsigned long nr_tables
;
462 unsigned long tables
;
463 } efi_system_table_t
;
465 struct efi_memory_map
{
470 unsigned long desc_version
;
471 unsigned long desc_size
;
477 efi_system_table_t
*system_table
;
481 u32 load_options_size
;
484 __aligned_u64 image_size
;
485 unsigned int image_code_type
;
486 unsigned int image_data_type
;
487 unsigned long unload
;
488 } efi_loaded_image_t
;
493 } efi_file_io_interface_t
;
499 efi_time_t create_time
;
500 efi_time_t last_access_time
;
501 efi_time_t modification_time
;
502 __aligned_u64 attribute
;
503 efi_char16_t filename
[1];
520 #define EFI_FILE_MODE_READ 0x0000000000000001
521 #define EFI_FILE_MODE_WRITE 0x0000000000000002
522 #define EFI_FILE_MODE_CREATE 0x8000000000000000
524 #define EFI_INVALID_TABLE_ADDR (~0UL)
527 * All runtime access to EFI goes through this structure:
530 efi_system_table_t
*systab
; /* EFI system table */
531 unsigned int runtime_version
; /* Runtime services version */
532 unsigned long mps
; /* MPS table */
533 unsigned long acpi
; /* ACPI table (IA64 ext 0.71) */
534 unsigned long acpi20
; /* ACPI table (ACPI 2.0) */
535 unsigned long smbios
; /* SM BIOS table */
536 unsigned long sal_systab
; /* SAL system table */
537 unsigned long boot_info
; /* boot info table */
538 unsigned long hcdp
; /* HCDP table */
539 unsigned long uga
; /* UGA table */
540 unsigned long uv_systab
; /* UV system table */
541 efi_get_time_t
*get_time
;
542 efi_set_time_t
*set_time
;
543 efi_get_wakeup_time_t
*get_wakeup_time
;
544 efi_set_wakeup_time_t
*set_wakeup_time
;
545 efi_get_variable_t
*get_variable
;
546 efi_get_next_variable_t
*get_next_variable
;
547 efi_set_variable_t
*set_variable
;
548 efi_query_variable_info_t
*query_variable_info
;
549 efi_update_capsule_t
*update_capsule
;
550 efi_query_capsule_caps_t
*query_capsule_caps
;
551 efi_get_next_high_mono_count_t
*get_next_high_mono_count
;
552 efi_reset_system_t
*reset_system
;
553 efi_set_virtual_address_map_t
*set_virtual_address_map
;
557 efi_guidcmp (efi_guid_t left
, efi_guid_t right
)
559 return memcmp(&left
, &right
, sizeof (efi_guid_t
));
563 efi_guid_unparse(efi_guid_t
*guid
, char *out
)
565 sprintf(out
, "%pUl", guid
->b
);
569 extern void efi_init (void);
570 extern void *efi_get_pal_addr (void);
571 extern void efi_map_pal_code (void);
572 extern void efi_memmap_walk (efi_freemem_callback_t callback
, void *arg
);
573 extern void efi_gettimeofday (struct timespec
*ts
);
574 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
576 extern void efi_late_init(void);
577 extern void efi_free_boot_services(void);
579 static inline void efi_late_init(void) {}
580 static inline void efi_free_boot_services(void) {}
582 extern void __iomem
*efi_lookup_mapped_addr(u64 phys_addr
);
583 extern u64
efi_get_iobase (void);
584 extern u32
efi_mem_type (unsigned long phys_addr
);
585 extern u64
efi_mem_attributes (unsigned long phys_addr
);
586 extern u64
efi_mem_attribute (unsigned long phys_addr
, unsigned long size
);
587 extern int __init
efi_uart_console_only (void);
588 extern void efi_initialize_iomem_resources(struct resource
*code_resource
,
589 struct resource
*data_resource
, struct resource
*bss_resource
);
590 extern unsigned long efi_get_time(void);
591 extern int efi_set_rtc_mmss(unsigned long nowtime
);
592 extern void efi_reserve_boot_services(void);
593 extern struct efi_memory_map memmap
;
596 * efi_range_is_wc - check the WC bit on an address range
597 * @start: starting kvirt address
598 * @len: length of range
600 * Consult the EFI memory map and make sure it's ok to set this range WC.
601 * Returns true or false.
603 static inline int efi_range_is_wc(unsigned long start
, unsigned long len
)
607 for (i
= 0; i
< len
; i
+= (1UL << EFI_PAGE_SHIFT
)) {
608 unsigned long paddr
= __pa(start
+ i
);
609 if (!(efi_mem_attributes(paddr
) & EFI_MEMORY_WC
))
612 /* The range checked out */
616 #ifdef CONFIG_EFI_PCDP
617 extern int __init
efi_setup_pcdp_console(char *);
621 * We play games with efi_enabled so that the compiler will, if
622 * possible, remove EFI-related code altogether.
624 #define EFI_BOOT 0 /* Were we booted from EFI? */
625 #define EFI_SYSTEM_TABLES 1 /* Can we use EFI system tables? */
626 #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
627 #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
628 #define EFI_MEMMAP 4 /* Can we use EFI memory map? */
629 #define EFI_64BIT 5 /* Is the firmware 64-bit? */
633 extern int efi_enabled(int facility
);
635 static inline int efi_enabled(int facility
)
641 static inline int efi_enabled(int facility
)
648 * Variable Attributes
650 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
651 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
652 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
653 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
654 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
655 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
656 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
658 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
659 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
660 EFI_VARIABLE_RUNTIME_ACCESS | \
661 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
662 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
663 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
664 EFI_VARIABLE_APPEND_WRITE)
666 * The type of search to perform when calling boottime->locate_handle
668 #define EFI_LOCATE_ALL_HANDLES 0
669 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
670 #define EFI_LOCATE_BY_PROTOCOL 2
673 * EFI Device Path information
675 #define EFI_DEV_HW 0x01
676 #define EFI_DEV_PCI 1
677 #define EFI_DEV_PCCARD 2
678 #define EFI_DEV_MEM_MAPPED 3
679 #define EFI_DEV_VENDOR 4
680 #define EFI_DEV_CONTROLLER 5
681 #define EFI_DEV_ACPI 0x02
682 #define EFI_DEV_BASIC_ACPI 1
683 #define EFI_DEV_EXPANDED_ACPI 2
684 #define EFI_DEV_MSG 0x03
685 #define EFI_DEV_MSG_ATAPI 1
686 #define EFI_DEV_MSG_SCSI 2
687 #define EFI_DEV_MSG_FC 3
688 #define EFI_DEV_MSG_1394 4
689 #define EFI_DEV_MSG_USB 5
690 #define EFI_DEV_MSG_USB_CLASS 15
691 #define EFI_DEV_MSG_I20 6
692 #define EFI_DEV_MSG_MAC 11
693 #define EFI_DEV_MSG_IPV4 12
694 #define EFI_DEV_MSG_IPV6 13
695 #define EFI_DEV_MSG_INFINIBAND 9
696 #define EFI_DEV_MSG_UART 14
697 #define EFI_DEV_MSG_VENDOR 10
698 #define EFI_DEV_MEDIA 0x04
699 #define EFI_DEV_MEDIA_HARD_DRIVE 1
700 #define EFI_DEV_MEDIA_CDROM 2
701 #define EFI_DEV_MEDIA_VENDOR 3
702 #define EFI_DEV_MEDIA_FILE 4
703 #define EFI_DEV_MEDIA_PROTOCOL 5
704 #define EFI_DEV_BIOS_BOOT 0x05
705 #define EFI_DEV_END_PATH 0x7F
706 #define EFI_DEV_END_PATH2 0xFF
707 #define EFI_DEV_END_INSTANCE 0x01
708 #define EFI_DEV_END_ENTIRE 0xFF
710 struct efi_generic_dev_path
{
714 } __attribute ((packed
));
716 static inline void memrange_efi_to_native(u64
*addr
, u64
*npages
)
718 *npages
= PFN_UP(*addr
+ (*npages
<<EFI_PAGE_SHIFT
)) - PFN_DOWN(*addr
);
722 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
724 * EFI Variable support.
726 * Different firmware drivers can expose their EFI-like variables using
730 struct efivar_operations
{
731 efi_get_variable_t
*get_variable
;
732 efi_get_next_variable_t
*get_next_variable
;
733 efi_set_variable_t
*set_variable
;
734 efi_query_variable_info_t
*query_variable_info
;
739 * ->lock protects two things:
740 * 1) ->list - adds, removals, reads, writes
741 * 2) ops.[gs]et_variable() calls.
742 * It must not be held when creating sysfs entries or calling kmalloc.
743 * ops.get_next_variable() is only called from register_efivars(),
744 * which is protected by the BKL, so that path is safe.
747 struct list_head list
;
749 struct kobject
*kobject
;
750 struct bin_attribute
*new_var
, *del_var
;
751 const struct efivar_operations
*ops
;
752 struct efivar_entry
*walk_entry
;
753 struct pstore_info efi_pstore_info
;
756 int register_efivars(struct efivars
*efivars
,
757 const struct efivar_operations
*ops
,
758 struct kobject
*parent_kobj
);
759 void unregister_efivars(struct efivars
*efivars
);
761 #endif /* CONFIG_EFI_VARS */
763 #endif /* _LINUX_EFI_H */