69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
|
/** @file
|
||
|
|
C based implemention of IA32 interrupt handling only
|
||
|
|
requiring a minimal assembly interrupt entry point.
|
||
|
|
|
||
|
|
Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#ifndef _CPU_GDT_H_
|
||
|
|
#define _CPU_GDT_H_
|
||
|
|
|
||
|
|
//
|
||
|
|
// Local structure definitions
|
||
|
|
//
|
||
|
|
|
||
|
|
#pragma pack (1)
|
||
|
|
|
||
|
|
//
|
||
|
|
// Global Descriptor Entry structures
|
||
|
|
//
|
||
|
|
|
||
|
|
typedef struct _GDT_ENTRY {
|
||
|
|
UINT16 Limit15_0;
|
||
|
|
UINT16 Base15_0;
|
||
|
|
UINT8 Base23_16;
|
||
|
|
UINT8 Type;
|
||
|
|
UINT8 Limit19_16_and_flags;
|
||
|
|
UINT8 Base31_24;
|
||
|
|
} GDT_ENTRY;
|
||
|
|
|
||
|
|
typedef
|
||
|
|
struct _GDT_ENTRIES {
|
||
|
|
GDT_ENTRY Null;
|
||
|
|
GDT_ENTRY Linear;
|
||
|
|
GDT_ENTRY LinearCode;
|
||
|
|
GDT_ENTRY SysData;
|
||
|
|
GDT_ENTRY SysCode;
|
||
|
|
GDT_ENTRY Spare4;
|
||
|
|
GDT_ENTRY LinearData64;
|
||
|
|
GDT_ENTRY LinearCode64;
|
||
|
|
GDT_ENTRY Spare5;
|
||
|
|
} GDT_ENTRIES;
|
||
|
|
|
||
|
|
#pragma pack ()
|
||
|
|
|
||
|
|
#define NULL_SEL OFFSET_OF (GDT_ENTRIES, Null)
|
||
|
|
#define LINEAR_SEL OFFSET_OF (GDT_ENTRIES, Linear)
|
||
|
|
#define LINEAR_CODE_SEL OFFSET_OF (GDT_ENTRIES, LinearCode)
|
||
|
|
#define SYS_DATA_SEL OFFSET_OF (GDT_ENTRIES, SysData)
|
||
|
|
#define SYS_CODE_SEL OFFSET_OF (GDT_ENTRIES, SysCode)
|
||
|
|
#define SPARE4_SEL OFFSET_OF (GDT_ENTRIES, Spare4)
|
||
|
|
#define LINEAR_DATA64_SEL OFFSET_OF (GDT_ENTRIES, LinearData64)
|
||
|
|
#define LINEAR_CODE64_SEL OFFSET_OF (GDT_ENTRIES, LinearCode64)
|
||
|
|
#define SPARE5_SEL OFFSET_OF (GDT_ENTRIES, Spare5)
|
||
|
|
|
||
|
|
#if defined (MDE_CPU_IA32)
|
||
|
|
#define CPU_CODE_SEL LINEAR_CODE_SEL
|
||
|
|
#define CPU_DATA_SEL LINEAR_SEL
|
||
|
|
#elif defined (MDE_CPU_X64)
|
||
|
|
#define CPU_CODE_SEL LINEAR_CODE64_SEL
|
||
|
|
#define CPU_DATA_SEL LINEAR_DATA64_SEL
|
||
|
|
#else
|
||
|
|
#error CPU type not supported for CPU GDT initialization!
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // _CPU_GDT_H_
|
||
|
|
|