39 lines
890 B
C
39 lines
890 B
C
#ifndef _DESCTBL_H_
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#define _DESCTBL_H_
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#define ADR_IDT 0x0026f800
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#define LIMIT_IDT 0x000007ff
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#define ADR_GDT 0x00270000
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#define LIMIT_GDT 0x0000ffff
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#define ADR_BOOTPACK 0x00280000
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#define LIMIT_BOOTPACK 0x0007ffff
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#define AR_DATA32_RW 0x4092
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#define AR_CODE32_ER 0x409a
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#define AR_LDT 0x0082
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#define AR_TSS32 0x0089
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#define AR_INTGATE32 0x008e
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struct SegmentDescriptor {
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short limit_low, base_low;
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char base_mid, access_right;
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char limit_high, base_high;
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};
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struct GateDescriptor {
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short offset_low, selector;
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char dw_count, access_right;
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short offset_high;
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};
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void init_gdtidt(void);
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void set_segmdesc(struct SegmentDescriptor *sd, unsigned int limit, int base,
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int ar);
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void set_gatedesc(struct GateDescriptor *gd, int offset, int selector, int ar);
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void load_gdtr(int limit, int addr);
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void load_idtr(int limit, int addr);
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#endif // _DESCTBL_H_
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