164 lines
2.8 KiB
C
164 lines
2.8 KiB
C
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/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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abios.h
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Abstract:
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This module contains the i386 kernel ABIOS specific header file.
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Author:
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Shie-Lin Tzong (shielint) 22-May-1991
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Revision History:
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*/
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// Define public portion of the ABIOS Device Block
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typedef struct _KDEVICE_BLOCK {
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USHORT Length;
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UCHAR Revision;
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UCHAR SecondDeviceId;
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USHORT LogicalId;
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USHORT DeviceId;
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USHORT NumberExclusivePortPairs;
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USHORT NumberCommonPortPairs;
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} KDEVICE_BLOCK, *PKDEVICE_BLOCK;
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typedef struct _KABIOS_POINTER {
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USHORT Offset;
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USHORT Selector;
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} KABIOS_POINTER, *PKABIOS_POINTER;
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#pragma pack(1)
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// ABIOS Function Transfer Table definition
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typedef struct _KFUNCTION_TRANSFER_TABLE {
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KABIOS_POINTER CommonRoutine[3];
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USHORT FunctionCount;
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USHORT Reserved;
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KABIOS_POINTER SpecificRoutine;
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} KFUNCTION_TRANSFER_TABLE, *PKFUNCTION_TRANSFER_TABLE;
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// ABIOS Commom Data Area definitions
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typedef struct _KDB_FTT_SECTION {
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KABIOS_POINTER DeviceBlock;
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KABIOS_POINTER FunctionTransferTable;
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} KDB_FTT_SECTION, *PKDB_FTT_SECTION;
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typedef struct _KCOMMON_DATA_AREA {
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USHORT DataPointer0Offset;
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USHORT NumberLids;
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ULONG Reserved;
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PKDB_FTT_SECTION DbFttPointer;
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} KCOMMON_DATA_AREA, *PKCOMMON_DATA_AREA;
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#pragma pack()
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// Available GDT Entry
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typedef struct _KFREE_GDT_ENTRY {
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struct _KFREE_GDT_ENTRY *Flink;
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ULONG BaseMid : 8;
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ULONG Type : 5;
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ULONG Dpl : 2;
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ULONG Present : 1;
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ULONG LimitHi : 4;
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ULONG Sys : 1;
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ULONG Reserved_0 : 1;
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ULONG Default_Big : 1;
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ULONG Granularity : 1;
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ULONG BaseHi : 8;
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} KFREE_GDT_ENTRY, *PKFREE_GDT_ENTRY;
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// Logical Id table entry
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typedef struct _KLID_TABLE_ENTRY {
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ULONG Owner;
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ULONG OwnerCount;
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} KLID_TABLE_ENTRY, *PKLID_TABLE_ENTRY;
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#define LID_NO_SPECIFIC_OWNER 0xffffffff
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#define NUMBER_LID_TABLE_ENTRIES 1024
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// Macro to extract the high byte of a short offset
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#define HIGHBYTE(l) ((UCHAR)(((USHORT)(l)>>8) & 0xff))
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// Macro to extract the low byte of a short offset
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#define LOWBYTE(l) ((UCHAR)(l))
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// The following selectors are reserved for 16 bit stack, code and
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// ABIOS Common Data Area.
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#define KGDT_STACK16 0xf8
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#define KGDT_CODE16 0xf0
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#define KGDT_CDA16 0xe8
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#define KGDT_GDT_ALIAS 0x70
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// Misc. definitions
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#define RESERVED_GDT_ENTRIES 28
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// External references
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extern PKFREE_GDT_ENTRY KiAbiosGdtStart;
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extern PKFREE_GDT_ENTRY KiAbiosGdtEnd;
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extern PUCHAR KiEndOfCode16;
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extern ULONG KiStack16GdtEntry;
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extern
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VOID
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KiI386CallAbios(
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IN KABIOS_POINTER AbiosFunction,
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IN KABIOS_POINTER DeviceBlockPointer,
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IN KABIOS_POINTER FunctionTransferTable,
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IN KABIOS_POINTER RequestBlock
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);
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VOID
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KiInitializeAbiosGdtEntry (
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OUT PKGDTENTRY GdtEntry,
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IN ULONG Base,
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IN ULONG Limit,
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IN USHORT Type
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);
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extern
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ULONG
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KiAbiosGetGdt (
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VOID
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);
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