54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
#ifndef __GDT_H__
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#define __GDT_H__
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#include "types.h"
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typedef enum E_GDT_RING {
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GDT_RING0 = 0,
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GDT_RING1,
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GDT_RING2,
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GDT_RING3
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} T_GDT_RING;
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typedef enum E_GDT_EXECUTABLE {
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GDT_NOT_EXECUTABLE = 0,
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GDT_EXECUTABLE = 1
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} T_GDT_EXECUTABLE;
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typedef enum E_GDT_RW {
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GDT_NOT_RW = 0,
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GDT_RW = 1
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} T_GDT_RW;
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struct S_GDT_SEGMENT {
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u16 LimitLow;
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u16 BaseLow;
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u8 BaseMiddle;
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u8 SegmentType : 4;
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u8 DescriptorType : 1;
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u8 DPL : 2;
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u8 Present : 1;
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u8 LimitMiddle : 4;
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u8 SystemAvailable : 1;
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u8 LongMode : 1;
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u8 OperationSize : 1;
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u8 Granularity : 1;
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u8 BaseHigh;
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} __attribute__((packed));
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typedef struct S_GDT_SEGMENT T_GDT_SEGMENT;
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struct S_GDT_PTR {
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u16 Size;
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u64 Address;
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} __attribute__((packed));
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typedef struct S_GDT_PTR T_GDT_PTR;
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void gdt_entry_create(u8 Index, u32 Base, u32 Limit, T_GDT_RING DPL, \
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T_GDT_EXECUTABLE Executable, T_GDT_RW ReadWrite, u8 Long);
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void gdt_create_flat(void);
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//From gdt.asm
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void gdt_flush(void);
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#endif
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