| 1 | #ifndef _LINUX_EFI_H |
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| 2 | #define _LINUX_EFI_H |
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| 3 | |
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| 4 | /* |
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| 5 | * Extensible Firmware Interface |
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| 6 | * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999 |
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| 7 | * |
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| 8 | * Copyright (C) 1999 VA Linux Systems |
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| 9 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> |
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| 10 | * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. |
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| 11 | * David Mosberger-Tang <davidm@hpl.hp.com> |
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| 12 | * Stephane Eranian <eranian@hpl.hp.com> |
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| 13 | */ |
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| 14 | #include <linux/init.h> |
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| 15 | #include <sys/time.h> |
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| 16 | #include <linux/types.h> |
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| 17 | #include <linux/proc_fs.h> |
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| 18 | #include <linux/rtc.h> |
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| 19 | #include <linux/ioport.h> |
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| 20 | |
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| 21 | #include <asm/page.h> |
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| 22 | #include <asm/system.h> |
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| 23 | |
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| 24 | #define EFI_SUCCESS 0 |
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| 25 | #define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1))) |
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| 26 | #define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1))) |
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| 27 | #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1))) |
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| 28 | #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1))) |
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| 29 | #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1))) |
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| 30 | #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) |
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| 31 | |
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| 32 | typedef unsigned long efi_status_t; |
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| 33 | typedef __u8 efi_bool_t; |
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| 34 | typedef __u16 efi_char16_t; /* UNICODE character */ |
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| 35 | |
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| 36 | |
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| 37 | typedef struct { |
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| 38 | __u8 b[16]; |
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| 39 | } efi_guid_t; |
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| 40 | |
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| 41 | #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ |
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| 42 | ((efi_guid_t) \ |
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| 43 | {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ |
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| 44 | (b) & 0xff, ((b) >> 8) & 0xff, \ |
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| 45 | (c) & 0xff, ((c) >> 8) & 0xff, \ |
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| 46 | (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) |
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| 47 | |
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| 48 | /* |
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| 49 | * Generic EFI table header |
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| 50 | */ |
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| 51 | typedef struct { |
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| 52 | __u64 signature; |
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| 53 | __u32 revision; |
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| 54 | __u32 headersize; |
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| 55 | __u32 crc32; |
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| 56 | __u32 reserved; |
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| 57 | } efi_table_hdr_t; |
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| 58 | |
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| 59 | /* |
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| 60 | * Memory map descriptor: |
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| 61 | */ |
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| 62 | |
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| 63 | /* Memory types: */ |
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| 64 | #define EFI_RESERVED_TYPE 0 |
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| 65 | #define EFI_LOADER_CODE 1 |
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| 66 | #define EFI_LOADER_DATA 2 |
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| 67 | #define EFI_BOOT_SERVICES_CODE 3 |
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| 68 | #define EFI_BOOT_SERVICES_DATA 4 |
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| 69 | #define EFI_RUNTIME_SERVICES_CODE 5 |
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| 70 | #define EFI_RUNTIME_SERVICES_DATA 6 |
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| 71 | #define EFI_CONVENTIONAL_MEMORY 7 |
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| 72 | #define EFI_UNUSABLE_MEMORY 8 |
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| 73 | #define EFI_ACPI_RECLAIM_MEMORY 9 |
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| 74 | #define EFI_ACPI_MEMORY_NVS 10 |
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| 75 | #define EFI_MEMORY_MAPPED_IO 11 |
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| 76 | #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 |
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| 77 | #define EFI_PAL_CODE 13 |
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| 78 | #define EFI_MAX_MEMORY_TYPE 14 |
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| 79 | |
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| 80 | /* Attribute values: */ |
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| 81 | #define EFI_MEMORY_UC ((__u64)0x0000000000000001ULL) /* uncached */ |
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| 82 | #define EFI_MEMORY_WC ((__u64)0x0000000000000002ULL) /* write-coalescing */ |
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| 83 | #define EFI_MEMORY_WT ((__u64)0x0000000000000004ULL) /* write-through */ |
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| 84 | #define EFI_MEMORY_WB ((__u64)0x0000000000000008ULL) /* write-back */ |
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| 85 | #define EFI_MEMORY_WP ((__u64)0x0000000000001000ULL) /* write-protect */ |
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| 86 | #define EFI_MEMORY_RP ((__u64)0x0000000000002000ULL) /* read-protect */ |
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| 87 | #define EFI_MEMORY_XP ((__u64)0x0000000000004000ULL) /* execute-protect */ |
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| 88 | #define EFI_MEMORY_RUNTIME ((__u64)0x8000000000000000ULL) /* range requires runtime mapping */ |
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| 89 | #define EFI_MEMORY_DESCRIPTOR_VERSION 1 |
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| 90 | |
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| 91 | #define EFI_PAGE_SHIFT 12 |
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| 92 | |
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| 93 | /* |
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| 94 | * For current x86 implementations of EFI, there is |
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| 95 | * additional padding in the mem descriptors. This is not |
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| 96 | * the case in ia64. Need to have this fixed in the f/w. |
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| 97 | */ |
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| 98 | typedef struct { |
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| 99 | __u32 type; |
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| 100 | __u32 pad; |
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| 101 | __u64 phys_addr; |
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| 102 | __u64 virt_addr; |
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| 103 | __u64 num_pages; |
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| 104 | __u64 attribute; |
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| 105 | #if defined (__i386__) |
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| 106 | __u64 pad1; |
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| 107 | #endif |
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| 108 | } efi_memory_desc_t; |
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| 109 | |
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| 110 | typedef int (*efi_freemem_callback_t) (unsigned long start, unsigned long end, void *arg); |
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| 111 | |
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| 112 | /* |
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| 113 | * Types and defines for Time Services |
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| 114 | */ |
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| 115 | #define EFI_TIME_ADJUST_DAYLIGHT 0x1 |
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| 116 | #define EFI_TIME_IN_DAYLIGHT 0x2 |
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| 117 | #define EFI_UNSPECIFIED_TIMEZONE 0x07ff |
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| 118 | |
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| 119 | typedef struct { |
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| 120 | __u16 year; |
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| 121 | __u8 month; |
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| 122 | __u8 day; |
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| 123 | __u8 hour; |
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| 124 | __u8 minute; |
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| 125 | __u8 second; |
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| 126 | __u8 pad1; |
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| 127 | __u32 nanosecond; |
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| 128 | __s16 timezone; |
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| 129 | __u8 daylight; |
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| 130 | __u8 pad2; |
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| 131 | } efi_time_t; |
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| 132 | |
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| 133 | typedef struct { |
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| 134 | __u32 resolution; |
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| 135 | __u32 accuracy; |
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| 136 | __u8 sets_to_zero; |
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| 137 | } efi_time_cap_t; |
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| 138 | |
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| 139 | /* |
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| 140 | * Types and defines for EFI ResetSystem |
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| 141 | */ |
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| 142 | #define EFI_RESET_COLD 0 |
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| 143 | #define EFI_RESET_WARM 1 |
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| 144 | #define EFI_RESET_SHUTDOWN 2 |
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| 145 | |
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| 146 | /* |
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| 147 | * EFI Runtime Services table |
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| 148 | */ |
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| 149 | #define EFI_RUNTIME_SERVICES_SIGNATURE ((__u64)0x5652453544e5552ULL) |
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| 150 | #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 |
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| 151 | |
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| 152 | typedef struct { |
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| 153 | efi_table_hdr_t hdr; |
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| 154 | unsigned long get_time; |
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| 155 | unsigned long set_time; |
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| 156 | unsigned long get_wakeup_time; |
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| 157 | unsigned long set_wakeup_time; |
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| 158 | unsigned long set_virtual_address_map; |
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| 159 | unsigned long convert_pointer; |
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| 160 | unsigned long get_variable; |
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| 161 | unsigned long get_next_variable; |
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| 162 | unsigned long set_variable; |
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| 163 | unsigned long get_next_high_mono_count; |
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| 164 | unsigned long reset_system; |
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| 165 | } efi_runtime_services_t; |
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| 166 | |
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| 167 | typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); |
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| 168 | typedef efi_status_t efi_set_time_t (efi_time_t *tm); |
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| 169 | typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, |
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| 170 | efi_time_t *tm); |
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| 171 | typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); |
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| 172 | typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, __u32 *attr, |
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| 173 | unsigned long *data_size, void *data); |
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| 174 | typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, |
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| 175 | efi_guid_t *vendor); |
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| 176 | typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, |
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| 177 | unsigned long attr, unsigned long data_size, |
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| 178 | void *data); |
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| 179 | typedef efi_status_t efi_get_next_high_mono_count_t (__u32 *count); |
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| 180 | typedef void efi_reset_system_t (int reset_type, efi_status_t status, |
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| 181 | unsigned long data_size, efi_char16_t *data); |
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| 182 | typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, |
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| 183 | unsigned long descriptor_size, |
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| 184 | __u32 descriptor_version, |
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| 185 | efi_memory_desc_t *virtual_map); |
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| 186 | |
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| 187 | /* |
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| 188 | * EFI Configuration Table and GUID definitions |
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| 189 | */ |
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| 190 | #define NULL_GUID \ |
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| 191 | EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ) |
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| 192 | |
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| 193 | #define MPS_TABLE_GUID \ |
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| 194 | EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) |
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| 195 | |
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| 196 | #define ACPI_TABLE_GUID \ |
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| 197 | EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) |
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| 198 | |
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| 199 | #define ACPI_20_TABLE_GUID \ |
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| 200 | EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 ) |
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| 201 | |
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| 202 | #define SMBIOS_TABLE_GUID \ |
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| 203 | EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) |
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| 204 | |
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| 205 | #define SAL_SYSTEM_TABLE_GUID \ |
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| 206 | EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) |
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| 207 | |
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| 208 | #define HCDP_TABLE_GUID \ |
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| 209 | EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 ) |
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| 210 | |
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| 211 | #define UGA_IO_PROTOCOL_GUID \ |
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| 212 | EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 ) |
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| 213 | |
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| 214 | #define EFI_GLOBAL_VARIABLE_GUID \ |
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| 215 | EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c ) |
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| 216 | |
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| 217 | typedef struct { |
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| 218 | efi_guid_t guid; |
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| 219 | unsigned long table; |
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| 220 | } efi_config_table_t; |
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| 221 | |
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| 222 | #define EFI_SYSTEM_TABLE_SIGNATURE ((__u64)0x5453595320494249ULL) |
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| 223 | #define EFI_SYSTEM_TABLE_REVISION ((1 << 16) | 00) |
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| 224 | |
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| 225 | typedef struct { |
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| 226 | efi_table_hdr_t hdr; |
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| 227 | unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ |
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| 228 | __u32 fw_revision; |
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| 229 | unsigned long con_in_handle; |
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| 230 | unsigned long con_in; |
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| 231 | unsigned long con_out_handle; |
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| 232 | unsigned long con_out; |
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| 233 | unsigned long stderr_handle; |
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| 234 | unsigned long stderr; |
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| 235 | efi_runtime_services_t *runtime; |
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| 236 | unsigned long boottime; |
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| 237 | unsigned long nr_tables; |
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| 238 | unsigned long tables; |
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| 239 | } efi_system_table_t; |
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| 240 | |
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| 241 | struct efi_memory_map { |
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| 242 | efi_memory_desc_t *phys_map; |
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| 243 | efi_memory_desc_t *map; |
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| 244 | int nr_map; |
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| 245 | unsigned long desc_version; |
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| 246 | }; |
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| 247 | |
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| 248 | /* |
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| 249 | * All runtime access to EFI goes through this structure: |
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| 250 | */ |
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| 251 | extern struct efi { |
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| 252 | efi_system_table_t *systab; /* EFI system table */ |
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| 253 | void *mps; /* MPS table */ |
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| 254 | void *acpi; /* ACPI table (IA64 ext 0.71) */ |
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| 255 | void *acpi20; /* ACPI table (ACPI 2.0) */ |
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| 256 | void *smbios; /* SM BIOS table */ |
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| 257 | void *sal_systab; /* SAL system table */ |
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| 258 | void *boot_info; /* boot info table */ |
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| 259 | void *hcdp; /* HCDP table */ |
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| 260 | void *uga; /* UGA table */ |
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| 261 | efi_get_time_t *get_time; |
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| 262 | efi_set_time_t *set_time; |
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| 263 | efi_get_wakeup_time_t *get_wakeup_time; |
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| 264 | efi_set_wakeup_time_t *set_wakeup_time; |
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| 265 | efi_get_variable_t *get_variable; |
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| 266 | efi_get_next_variable_t *get_next_variable; |
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| 267 | efi_set_variable_t *set_variable; |
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| 268 | efi_get_next_high_mono_count_t *get_next_high_mono_count; |
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| 269 | efi_reset_system_t *reset_system; |
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| 270 | efi_set_virtual_address_map_t *set_virtual_address_map; |
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| 271 | } efi; |
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| 272 | |
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| 273 | static inline int |
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| 274 | efi_guidcmp (efi_guid_t left, efi_guid_t right) |
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| 275 | { |
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| 276 | return memcmp(&left, &right, sizeof (efi_guid_t)); |
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| 277 | } |
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| 278 | |
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| 279 | static inline char * |
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| 280 | efi_guid_unparse(efi_guid_t *guid, char *out) |
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| 281 | { |
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| 282 | sprintf(out, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", |
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| 283 | guid->b[3], guid->b[2], guid->b[1], guid->b[0], |
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| 284 | guid->b[5], guid->b[4], guid->b[7], guid->b[6], |
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| 285 | guid->b[8], guid->b[9], guid->b[10], guid->b[11], |
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| 286 | guid->b[12], guid->b[13], guid->b[14], guid->b[15]); |
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| 287 | return out; |
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| 288 | } |
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| 289 | |
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| 290 | extern void efi_init (void); |
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| 291 | extern void *efi_get_pal_addr (void); |
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| 292 | extern void efi_map_pal_code (void); |
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| 293 | extern void efi_map_memmap(void); |
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| 294 | extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); |
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| 295 | extern void efi_gettimeofday (struct timespec *ts); |
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| 296 | extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ |
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| 297 | extern __u64 efi_get_iobase (void); |
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| 298 | extern __u32 efi_mem_type (unsigned long phys_addr); |
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| 299 | extern __u64 efi_mem_attributes (unsigned long phys_addr); |
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| 300 | extern int __init efi_uart_console_only (void); |
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| 301 | extern void efi_initialize_iomem_resources(struct resource *code_resource, |
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| 302 | struct resource *data_resource); |
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| 303 | extern unsigned long __init efi_get_time(void); |
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| 304 | extern int __init efi_set_rtc_mmss(unsigned long nowtime); |
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| 305 | extern struct efi_memory_map memmap; |
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| 306 | |
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| 307 | /** |
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| 308 | * efi_range_is_wc - check the WC bit on an address range |
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| 309 | * @start: starting kvirt address |
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| 310 | * @len: length of range |
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| 311 | * |
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| 312 | * Consult the EFI memory map and make sure it's ok to set this range WC. |
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| 313 | * Returns true or false. |
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| 314 | */ |
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| 315 | static inline int efi_range_is_wc(unsigned long start, unsigned long len) |
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| 316 | { |
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| 317 | int i; |
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| 318 | |
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| 319 | for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { |
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| 320 | unsigned long paddr = __pa(start + i); |
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| 321 | if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC)) |
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| 322 | return 0; |
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| 323 | } |
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| 324 | /* The range checked out */ |
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| 325 | return 1; |
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| 326 | } |
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| 327 | |
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| 328 | #ifdef CONFIG_EFI_PCDP |
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| 329 | extern int __init efi_setup_pcdp_console(char *); |
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| 330 | #endif |
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| 331 | |
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| 332 | /* |
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| 333 | * We play games with efi_enabled so that the compiler will, if possible, remove |
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| 334 | * EFI-related code altogether. |
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| 335 | */ |
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| 336 | #ifdef CONFIG_EFI |
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| 337 | # ifdef CONFIG_X86 |
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| 338 | extern int efi_enabled; |
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| 339 | # else |
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| 340 | # define efi_enabled 1 |
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| 341 | # endif |
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| 342 | #else |
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| 343 | # define efi_enabled 0 |
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| 344 | #endif |
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| 345 | |
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| 346 | /* |
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| 347 | * Variable Attributes |
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| 348 | */ |
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| 349 | #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 |
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| 350 | #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 |
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| 351 | #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 |
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| 352 | |
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| 353 | /* |
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| 354 | * EFI Device Path information |
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| 355 | */ |
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| 356 | #define EFI_DEV_HW 0x01 |
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| 357 | #define EFI_DEV_PCI 1 |
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| 358 | #define EFI_DEV_PCCARD 2 |
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| 359 | #define EFI_DEV_MEM_MAPPED 3 |
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| 360 | #define EFI_DEV_VENDOR 4 |
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| 361 | #define EFI_DEV_CONTROLLER 5 |
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| 362 | #define EFI_DEV_ACPI 0x02 |
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| 363 | #define EFI_DEV_BASIC_ACPI 1 |
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| 364 | #define EFI_DEV_EXPANDED_ACPI 2 |
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| 365 | #define EFI_DEV_MSG 0x03 |
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| 366 | #define EFI_DEV_MSG_ATAPI 1 |
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| 367 | #define EFI_DEV_MSG_SCSI 2 |
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| 368 | #define EFI_DEV_MSG_FC 3 |
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| 369 | #define EFI_DEV_MSG_1394 4 |
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| 370 | #define EFI_DEV_MSG_USB 5 |
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| 371 | #define EFI_DEV_MSG_USB_CLASS 15 |
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| 372 | #define EFI_DEV_MSG_I20 6 |
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| 373 | #define EFI_DEV_MSG_MAC 11 |
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| 374 | #define EFI_DEV_MSG_IPV4 12 |
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| 375 | #define EFI_DEV_MSG_IPV6 13 |
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| 376 | #define EFI_DEV_MSG_INFINIBAND 9 |
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| 377 | #define EFI_DEV_MSG_UART 14 |
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| 378 | #define EFI_DEV_MSG_VENDOR 10 |
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| 379 | #define EFI_DEV_MEDIA 0x04 |
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| 380 | #define EFI_DEV_MEDIA_HARD_DRIVE 1 |
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| 381 | #define EFI_DEV_MEDIA_CDROM 2 |
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| 382 | #define EFI_DEV_MEDIA_VENDOR 3 |
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| 383 | #define EFI_DEV_MEDIA_FILE 4 |
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| 384 | #define EFI_DEV_MEDIA_PROTOCOL 5 |
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| 385 | #define EFI_DEV_BIOS_BOOT 0x05 |
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| 386 | #define EFI_DEV_END_PATH 0x7F |
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| 387 | #define EFI_DEV_END_PATH2 0xFF |
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| 388 | #define EFI_DEV_END_INSTANCE 0x01 |
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| 389 | #define EFI_DEV_END_ENTIRE 0xFF |
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| 390 | |
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| 391 | struct efi_generic_dev_path { |
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| 392 | __u8 type; |
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| 393 | __u8 sub_type; |
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| 394 | __u16 length; |
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| 395 | } __attribute ((packed)); |
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| 396 | |
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| 397 | #endif /* _LINUX_EFI_H */ |
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