idt.h

用于汇编领域的,运用于OS的MAIN函数.基于硬件基础的源代码

#ifndef __IDT_H_
#define __IDT_H_

#define IDT_ENTRIES	256
#define START_HW_INT	0x20
#define NUM_HW_INT	16

/* idt selector type */
#define IDT_VECTOR_TRAP		0x8f	/* 10001111 : present, DPL=0 */
#define IDT_VECTOR_INTERRUPT	0x8e	/* 10001110 : present, DPL=0 */
#define IDT_VECTOR_CALLGATE	0x8c	/* 10001100 : present, DPL=0 */

typedef struct {
	unsigned short limit;
	unsigned long long base;
} __attribute__ ((packed)) idtr_t;

typedef struct {
	unsigned short	offset_low;
	unsigned short	sel;
	unsigned short	type;
	unsigned short	offset_high;
} __attribute__ ((packed)) idt_selector_t;

void init_idt(void);

#endif