285 lines
7.9 KiB
C
285 lines
7.9 KiB
C
#ifndef _LINUX_EFI_H
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#define _LINUX_EFI_H
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/*
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* Extensible Firmware Interface
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* Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 1999, 2002 Hewlett-Packard Co.
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Stephane Eranian <eranian@hpl.hp.com>
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*/
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/time.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <asm/page.h>
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#include <asm/system.h>
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#define EFI_SUCCESS 0
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#define EFI_LOAD_ERROR (1L | (1L << 63))
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#define EFI_INVALID_PARAMETER (2L | (1L << 63))
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#define EFI_UNSUPPORTED (3L | (1L << 63))
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#define EFI_BAD_BUFFER_SIZE (4L | (1L << 63))
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#define EFI_BUFFER_TOO_SMALL (5L | (1L << 63))
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#define EFI_NOT_FOUND (14L | (1L << 63))
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typedef unsigned long efi_status_t;
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typedef u8 efi_bool_t;
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typedef u16 efi_char16_t; /* UNICODE character */
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typedef struct {
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u8 b[16];
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} efi_guid_t;
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#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
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((efi_guid_t) \
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{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
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(b) & 0xff, ((b) >> 8) & 0xff, \
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(c) & 0xff, ((c) >> 8) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
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/*
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* Generic EFI table header
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*/
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typedef struct {
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u64 signature;
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u32 revision;
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u32 headersize;
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u32 crc32;
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u32 reserved;
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} efi_table_hdr_t;
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/*
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* Memory map descriptor:
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*/
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/* Memory types: */
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#define EFI_RESERVED_TYPE 0
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#define EFI_LOADER_CODE 1
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#define EFI_LOADER_DATA 2
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#define EFI_BOOT_SERVICES_CODE 3
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#define EFI_BOOT_SERVICES_DATA 4
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#define EFI_RUNTIME_SERVICES_CODE 5
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#define EFI_RUNTIME_SERVICES_DATA 6
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#define EFI_CONVENTIONAL_MEMORY 7
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#define EFI_UNUSABLE_MEMORY 8
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#define EFI_ACPI_RECLAIM_MEMORY 9
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#define EFI_ACPI_MEMORY_NVS 10
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#define EFI_MEMORY_MAPPED_IO 11
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#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
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#define EFI_PAL_CODE 13
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#define EFI_MAX_MEMORY_TYPE 14
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/* Attribute values: */
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#define EFI_MEMORY_UC 0x0000000000000001 /* uncached */
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#define EFI_MEMORY_WC 0x0000000000000002 /* write-coalescing */
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#define EFI_MEMORY_WT 0x0000000000000004 /* write-through */
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#define EFI_MEMORY_WB 0x0000000000000008 /* write-back */
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#define EFI_MEMORY_WP 0x0000000000001000 /* write-protect */
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#define EFI_MEMORY_RP 0x0000000000002000 /* read-protect */
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#define EFI_MEMORY_XP 0x0000000000004000 /* execute-protect */
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#define EFI_MEMORY_RUNTIME 0x8000000000000000 /* range requires runtime mapping */
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#define EFI_MEMORY_DESCRIPTOR_VERSION 1
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#define EFI_PAGE_SHIFT 12
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typedef struct {
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u32 type;
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u32 pad;
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u64 phys_addr;
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u64 virt_addr;
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u64 num_pages;
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u64 attribute;
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} efi_memory_desc_t;
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typedef int efi_freemem_callback_t (u64 start, u64 end, void *arg);
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/*
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* Types and defines for Time Services
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*/
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#define EFI_TIME_ADJUST_DAYLIGHT 0x1
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#define EFI_TIME_IN_DAYLIGHT 0x2
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#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
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typedef struct {
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u16 year;
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u8 month;
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u8 day;
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u8 hour;
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u8 minute;
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u8 second;
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u8 pad1;
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u32 nanosecond;
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s16 timezone;
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u8 daylight;
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u8 pad2;
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} efi_time_t;
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typedef struct {
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u32 resolution;
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u32 accuracy;
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u8 sets_to_zero;
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} efi_time_cap_t;
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/*
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* Types and defines for EFI ResetSystem
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*/
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#define EFI_RESET_COLD 0
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#define EFI_RESET_WARM 1
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/*
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* EFI Runtime Services table
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*/
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#define EFI_RUNTIME_SERVICES_SIGNATURE 0x5652453544e5552
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#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
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typedef struct {
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efi_table_hdr_t hdr;
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u64 get_time;
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u64 set_time;
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u64 get_wakeup_time;
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u64 set_wakeup_time;
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u64 set_virtual_address_map;
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u64 convert_pointer;
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u64 get_variable;
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u64 get_next_variable;
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u64 set_variable;
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u64 get_next_high_mono_count;
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u64 reset_system;
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} efi_runtime_services_t;
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typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
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typedef efi_status_t efi_set_time_t (efi_time_t *tm);
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typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
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efi_time_t *tm);
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typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
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typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
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unsigned long *data_size, void *data);
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typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
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efi_guid_t *vendor);
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typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 attr,
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unsigned long data_size, void *data);
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typedef efi_status_t efi_get_next_high_mono_count_t (u64 *count);
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typedef void efi_reset_system_t (int reset_type, efi_status_t status,
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unsigned long data_size, efi_char16_t *data);
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/*
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* EFI Configuration Table and GUID definitions
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*/
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#define NULL_GUID \
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EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
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#define MPS_TABLE_GUID \
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EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define ACPI_TABLE_GUID \
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EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define ACPI_20_TABLE_GUID \
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EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
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#define SMBIOS_TABLE_GUID \
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EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define SAL_SYSTEM_TABLE_GUID \
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EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define HCDP_TABLE_GUID \
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EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
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typedef struct {
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efi_guid_t guid;
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u64 table;
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} efi_config_table_t;
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#define EFI_SYSTEM_TABLE_SIGNATURE 0x5453595320494249
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#define EFI_SYSTEM_TABLE_REVISION ((1 << 16) | 00)
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typedef struct {
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efi_table_hdr_t hdr;
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u64 fw_vendor; /* physical addr of CHAR16 vendor string */
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u32 fw_revision;
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u64 con_in_handle;
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u64 con_in;
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u64 con_out_handle;
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u64 con_out;
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u64 stderr_handle;
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u64 stderr;
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u64 runtime;
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u64 boottime;
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u64 nr_tables;
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u64 tables;
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} efi_system_table_t;
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/*
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* All runtime access to EFI goes through this structure:
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*/
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extern struct efi {
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efi_system_table_t *systab; /* EFI system table */
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void *mps; /* MPS table */
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void *acpi; /* ACPI table (IA64 ext 0.71) */
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void *acpi20; /* ACPI table (ACPI 2.0) */
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void *smbios; /* SM BIOS table */
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void *sal_systab; /* SAL system table */
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void *hcdp; /* HCDP table */
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void *boot_info; /* boot info table */
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efi_get_time_t *get_time;
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efi_set_time_t *set_time;
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efi_get_wakeup_time_t *get_wakeup_time;
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efi_set_wakeup_time_t *set_wakeup_time;
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efi_get_variable_t *get_variable;
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efi_get_next_variable_t *get_next_variable;
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efi_set_variable_t *set_variable;
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efi_get_next_high_mono_count_t *get_next_high_mono_count;
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efi_reset_system_t *reset_system;
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} efi;
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static inline int
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efi_guidcmp (efi_guid_t left, efi_guid_t right)
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{
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return memcmp(&left, &right, sizeof (efi_guid_t));
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}
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static inline char *
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efi_guid_unparse(efi_guid_t *guid, char *out)
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{
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sprintf(out, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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guid->b[3], guid->b[2], guid->b[1], guid->b[0],
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guid->b[5], guid->b[4], guid->b[7], guid->b[6],
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guid->b[8], guid->b[9], guid->b[10], guid->b[11],
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guid->b[12], guid->b[13], guid->b[14], guid->b[15]);
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return out;
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}
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extern void efi_init (void);
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extern void efi_map_pal_code (void);
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extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
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extern void efi_gettimeofday (struct timeval *tv);
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extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
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extern u64 efi_get_iobase (void);
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extern u32 efi_mem_type (unsigned long phys_addr);
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extern u64 efi_mem_attributes (unsigned long phys_addr);
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/*
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* Variable Attributes
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*/
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#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
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#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
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#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
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/*
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* efi_dir is allocated in arch/ia64/kernel/efi.c.
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*/
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#ifdef CONFIG_PROC_FS
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extern struct proc_dir_entry *efi_dir;
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#endif
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#endif /* _LINUX_EFI_H */
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