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_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
34 typedef unsigned long efi_status_t;
35 typedef u8 efi_bool_t;
36 typedef u16 efi_char16_t; /* UNICODE character */
43 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
45 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
46 (b) & 0xff, ((b) >> 8) & 0xff, \
47 (c) & 0xff, ((c) >> 8) & 0xff, \
48 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
51 * Generic EFI table header
62 * Memory map descriptor:
66 #define EFI_RESERVED_TYPE 0
67 #define EFI_LOADER_CODE 1
68 #define EFI_LOADER_DATA 2
69 #define EFI_BOOT_SERVICES_CODE 3
70 #define EFI_BOOT_SERVICES_DATA 4
71 #define EFI_RUNTIME_SERVICES_CODE 5
72 #define EFI_RUNTIME_SERVICES_DATA 6
73 #define EFI_CONVENTIONAL_MEMORY 7
74 #define EFI_UNUSABLE_MEMORY 8
75 #define EFI_ACPI_RECLAIM_MEMORY 9
76 #define EFI_ACPI_MEMORY_NVS 10
77 #define EFI_MEMORY_MAPPED_IO 11
78 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
79 #define EFI_PAL_CODE 13
80 #define EFI_MAX_MEMORY_TYPE 14
82 /* Attribute values: */
83 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
84 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
85 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
86 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
87 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
88 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
89 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
90 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
91 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
93 #define EFI_PAGE_SHIFT 12
109 } efi_capsule_header_t;
112 * Allocation types for calls to boottime->allocate_pages.
114 #define EFI_ALLOCATE_ANY_PAGES 0
115 #define EFI_ALLOCATE_MAX_ADDRESS 1
116 #define EFI_ALLOCATE_ADDRESS 2
117 #define EFI_MAX_ALLOCATE_TYPE 3
119 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
122 * Types and defines for Time Services
124 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
125 #define EFI_TIME_IN_DAYLIGHT 0x2
126 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
149 * EFI Boot Services table
155 void *allocate_pages;
157 void *get_memory_map;
162 void *wait_for_event;
166 void *install_protocol_interface;
167 void *reinstall_protocol_interface;
168 void *uninstall_protocol_interface;
169 void *handle_protocol;
171 void *register_protocol_notify;
173 void *locate_device_path;
174 void *install_configuration_table;
179 void *exit_boot_services;
180 void *get_next_monotonic_count;
182 void *set_watchdog_timer;
183 void *connect_controller;
184 void *disconnect_controller;
186 void *close_protocol;
187 void *open_protocol_information;
188 void *protocols_per_handle;
189 void *locate_handle_buffer;
190 void *locate_protocol;
191 void *install_multiple_protocol_interfaces;
192 void *uninstall_multiple_protocol_interfaces;
193 void *calculate_crc32;
196 void *create_event_ex;
197 } efi_boot_services_t;
204 EfiPciIoWidthFifoUint8,
205 EfiPciIoWidthFifoUint16,
206 EfiPciIoWidthFifoUint32,
207 EfiPciIoWidthFifoUint64,
208 EfiPciIoWidthFillUint8,
209 EfiPciIoWidthFillUint16,
210 EfiPciIoWidthFillUint32,
211 EfiPciIoWidthFillUint64,
213 } EFI_PCI_IO_PROTOCOL_WIDTH;
216 EfiPciIoAttributeOperationGet,
217 EfiPciIoAttributeOperationSet,
218 EfiPciIoAttributeOperationEnable,
219 EfiPciIoAttributeOperationDisable,
220 EfiPciIoAttributeOperationSupported,
221 EfiPciIoAttributeOperationMaximum
222 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
228 } efi_pci_io_protocol_access_t;
233 efi_pci_io_protocol_access_t mem;
234 efi_pci_io_protocol_access_t io;
235 efi_pci_io_protocol_access_t pci;
239 void *allocate_buffer;
244 void *get_bar_attributes;
245 void *set_bar_attributes;
248 } efi_pci_io_protocol;
250 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
251 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
252 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
253 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
254 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
255 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
256 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
257 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
258 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
259 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
260 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
261 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
262 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
263 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
264 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
265 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
266 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
267 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
268 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
271 * Types and defines for EFI ResetSystem
273 #define EFI_RESET_COLD 0
274 #define EFI_RESET_WARM 1
275 #define EFI_RESET_SHUTDOWN 2
278 * EFI Runtime Services table
280 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
281 #define EFI_RUNTIME_SERVICES_REVISION 0x00010000
285 unsigned long get_time;
286 unsigned long set_time;
287 unsigned long get_wakeup_time;
288 unsigned long set_wakeup_time;
289 unsigned long set_virtual_address_map;
290 unsigned long convert_pointer;
291 unsigned long get_variable;
292 unsigned long get_next_variable;
293 unsigned long set_variable;
294 unsigned long get_next_high_mono_count;
295 unsigned long reset_system;
296 unsigned long update_capsule;
297 unsigned long query_capsule_caps;
298 unsigned long query_variable_info;
299 } efi_runtime_services_t;
301 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
302 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
303 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
305 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
306 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
307 unsigned long *data_size, void *data);
308 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
310 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
311 u32 attr, unsigned long data_size,
313 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
314 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
315 unsigned long data_size, efi_char16_t *data);
316 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
317 unsigned long descriptor_size,
318 u32 descriptor_version,
319 efi_memory_desc_t *virtual_map);
320 typedef efi_status_t efi_query_variable_info_t(u32 attr,
322 u64 *remaining_space,
323 u64 *max_variable_size);
324 typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
326 unsigned long sg_list);
327 typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
333 * EFI Configuration Table and GUID definitions
336 EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
338 #define MPS_TABLE_GUID \
339 EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
341 #define ACPI_TABLE_GUID \
342 EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
344 #define ACPI_20_TABLE_GUID \
345 EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
347 #define SMBIOS_TABLE_GUID \
348 EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
350 #define SAL_SYSTEM_TABLE_GUID \
351 EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
353 #define HCDP_TABLE_GUID \
354 EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
356 #define UGA_IO_PROTOCOL_GUID \
357 EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
359 #define EFI_GLOBAL_VARIABLE_GUID \
360 EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
362 #define UV_SYSTEM_TABLE_GUID \
363 EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
365 #define LINUX_EFI_CRASH_GUID \
366 EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
368 #define LOADED_IMAGE_PROTOCOL_GUID \
369 EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
371 #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
372 EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
374 #define EFI_UGA_PROTOCOL_GUID \
375 EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
377 #define EFI_PCI_IO_PROTOCOL_GUID \
378 EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
380 #define EFI_FILE_INFO_ID \
381 EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
383 #define EFI_FILE_SYSTEM_GUID \
384 EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
389 } efi_config_table_64_t;
394 } efi_config_table_32_t;
399 } efi_config_table_t;
401 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
403 #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
404 #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
405 #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
406 #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
407 #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
408 #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
412 u64 fw_vendor; /* physical addr of CHAR16 vendor string */
426 } efi_system_table_64_t;
430 u32 fw_vendor; /* physical addr of CHAR16 vendor string */
442 } efi_system_table_32_t;
446 unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
448 unsigned long con_in_handle;
449 unsigned long con_in;
450 unsigned long con_out_handle;
451 unsigned long con_out;
452 unsigned long stderr_handle;
453 unsigned long stderr;
454 efi_runtime_services_t *runtime;
455 efi_boot_services_t *boottime;
456 unsigned long nr_tables;
457 unsigned long tables;
458 } efi_system_table_t;
460 struct efi_memory_map {
465 unsigned long desc_version;
466 unsigned long desc_size;
472 efi_system_table_t *system_table;
476 u32 load_options_size;
479 __aligned_u64 image_size;
480 unsigned int image_code_type;
481 unsigned int image_data_type;
482 unsigned long unload;
483 } efi_loaded_image_t;
488 } efi_file_io_interface_t;
494 efi_time_t create_time;
495 efi_time_t last_access_time;
496 efi_time_t modification_time;
497 __aligned_u64 attribute;
498 efi_char16_t filename[1];
515 #define EFI_FILE_MODE_READ 0x0000000000000001
516 #define EFI_FILE_MODE_WRITE 0x0000000000000002
517 #define EFI_FILE_MODE_CREATE 0x8000000000000000
519 #define EFI_INVALID_TABLE_ADDR (~0UL)
522 * All runtime access to EFI goes through this structure:
525 efi_system_table_t *systab; /* EFI system table */
526 unsigned int runtime_version; /* Runtime services version */
527 unsigned long mps; /* MPS table */
528 unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
529 unsigned long acpi20; /* ACPI table (ACPI 2.0) */
530 unsigned long smbios; /* SM BIOS table */
531 unsigned long sal_systab; /* SAL system table */
532 unsigned long boot_info; /* boot info table */
533 unsigned long hcdp; /* HCDP table */
534 unsigned long uga; /* UGA table */
535 unsigned long uv_systab; /* UV system table */
536 efi_get_time_t *get_time;
537 efi_set_time_t *set_time;
538 efi_get_wakeup_time_t *get_wakeup_time;
539 efi_set_wakeup_time_t *set_wakeup_time;
540 efi_get_variable_t *get_variable;
541 efi_get_next_variable_t *get_next_variable;
542 efi_set_variable_t *set_variable;
543 efi_query_variable_info_t *query_variable_info;
544 efi_update_capsule_t *update_capsule;
545 efi_query_capsule_caps_t *query_capsule_caps;
546 efi_get_next_high_mono_count_t *get_next_high_mono_count;
547 efi_reset_system_t *reset_system;
548 efi_set_virtual_address_map_t *set_virtual_address_map;
552 efi_guidcmp (efi_guid_t left, efi_guid_t right)
554 return memcmp(&left, &right, sizeof (efi_guid_t));
558 efi_guid_unparse(efi_guid_t *guid, char *out)
560 sprintf(out, "%pUl", guid->b);
564 extern void efi_init (void);
565 extern void *efi_get_pal_addr (void);
566 extern void efi_map_pal_code (void);
567 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
568 extern void efi_gettimeofday (struct timespec *ts);
569 extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
571 extern void efi_late_init(void);
572 extern void efi_free_boot_services(void);
574 static inline void efi_late_init(void) {}
575 static inline void efi_free_boot_services(void) {}
577 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
578 extern u64 efi_get_iobase (void);
579 extern u32 efi_mem_type (unsigned long phys_addr);
580 extern u64 efi_mem_attributes (unsigned long phys_addr);
581 extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
582 extern int __init efi_uart_console_only (void);
583 extern void efi_initialize_iomem_resources(struct resource *code_resource,
584 struct resource *data_resource, struct resource *bss_resource);
585 extern unsigned long efi_get_time(void);
586 extern int efi_set_rtc_mmss(unsigned long nowtime);
587 extern void efi_reserve_boot_services(void);
588 extern struct efi_memory_map memmap;
591 * efi_range_is_wc - check the WC bit on an address range
592 * @start: starting kvirt address
593 * @len: length of range
595 * Consult the EFI memory map and make sure it's ok to set this range WC.
596 * Returns true or false.
598 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
602 for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
603 unsigned long paddr = __pa(start + i);
604 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
607 /* The range checked out */
611 #ifdef CONFIG_EFI_PCDP
612 extern int __init efi_setup_pcdp_console(char *);
616 * We play games with efi_enabled so that the compiler will, if possible, remove
617 * EFI-related code altogether.
621 extern int efi_enabled;
622 extern bool efi_64bit;
624 # define efi_enabled 1
627 # define efi_enabled 0
631 * Variable Attributes
633 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
634 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
635 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
636 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
637 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
638 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
639 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
641 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
642 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
643 EFI_VARIABLE_RUNTIME_ACCESS | \
644 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
645 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
646 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
647 EFI_VARIABLE_APPEND_WRITE)
649 * The type of search to perform when calling boottime->locate_handle
651 #define EFI_LOCATE_ALL_HANDLES 0
652 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1
653 #define EFI_LOCATE_BY_PROTOCOL 2
656 * EFI Device Path information
658 #define EFI_DEV_HW 0x01
659 #define EFI_DEV_PCI 1
660 #define EFI_DEV_PCCARD 2
661 #define EFI_DEV_MEM_MAPPED 3
662 #define EFI_DEV_VENDOR 4
663 #define EFI_DEV_CONTROLLER 5
664 #define EFI_DEV_ACPI 0x02
665 #define EFI_DEV_BASIC_ACPI 1
666 #define EFI_DEV_EXPANDED_ACPI 2
667 #define EFI_DEV_MSG 0x03
668 #define EFI_DEV_MSG_ATAPI 1
669 #define EFI_DEV_MSG_SCSI 2
670 #define EFI_DEV_MSG_FC 3
671 #define EFI_DEV_MSG_1394 4
672 #define EFI_DEV_MSG_USB 5
673 #define EFI_DEV_MSG_USB_CLASS 15
674 #define EFI_DEV_MSG_I20 6
675 #define EFI_DEV_MSG_MAC 11
676 #define EFI_DEV_MSG_IPV4 12
677 #define EFI_DEV_MSG_IPV6 13
678 #define EFI_DEV_MSG_INFINIBAND 9
679 #define EFI_DEV_MSG_UART 14
680 #define EFI_DEV_MSG_VENDOR 10
681 #define EFI_DEV_MEDIA 0x04
682 #define EFI_DEV_MEDIA_HARD_DRIVE 1
683 #define EFI_DEV_MEDIA_CDROM 2
684 #define EFI_DEV_MEDIA_VENDOR 3
685 #define EFI_DEV_MEDIA_FILE 4
686 #define EFI_DEV_MEDIA_PROTOCOL 5
687 #define EFI_DEV_BIOS_BOOT 0x05
688 #define EFI_DEV_END_PATH 0x7F
689 #define EFI_DEV_END_PATH2 0xFF
690 #define EFI_DEV_END_INSTANCE 0x01
691 #define EFI_DEV_END_ENTIRE 0xFF
693 struct efi_generic_dev_path {
697 } __attribute ((packed));
699 static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
701 *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
705 #if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
707 * EFI Variable support.
709 * Different firmware drivers can expose their EFI-like variables using
713 struct efivar_operations {
714 efi_get_variable_t *get_variable;
715 efi_get_next_variable_t *get_next_variable;
716 efi_set_variable_t *set_variable;
721 * ->lock protects two things:
722 * 1) ->list - adds, removals, reads, writes
723 * 2) ops.[gs]et_variable() calls.
724 * It must not be held when creating sysfs entries or calling kmalloc.
725 * ops.get_next_variable() is only called from register_efivars(),
726 * which is protected by the BKL, so that path is safe.
729 struct list_head list;
731 struct bin_attribute *new_var, *del_var;
732 const struct efivar_operations *ops;
733 struct efivar_entry *walk_entry;
734 struct pstore_info efi_pstore_info;
737 int register_efivars(struct efivars *efivars,
738 const struct efivar_operations *ops,
739 struct kobject *parent_kobj);
740 void unregister_efivars(struct efivars *efivars);
742 #endif /* CONFIG_EFI_VARS */
744 #endif /* _LINUX_EFI_H */