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#ifndef IDT_H
#define IDT_H

#include <types.h>

#define GDT_CODE_SEG	0x08

#define INTERRUPT_GATE	0x8E
#define TRAP_GATE	0x8F

struct idt_entry {
	uint16_t offset_1;		// offset bits 0..15
	uint16_t selector;		// a code segment selector in GDT or LDT
	uint8_t  ist;			// bits 0..2 holds Interrupt Stack Table offset, rest of bits zero.
	uint8_t  type_attributes;	// gate type, dpl, and p fields
	uint16_t offset_2;		// offset bits 16..31
	uint32_t offset_3;		// offset bits 32..63
	uint32_t zero;			// reserved
} __attribute__((packed));
typedef struct idt_entry idt_entry;

struct idtp {
	uint16_t size;
	uint64_t offset;
} __attribute__((packed));
typedef struct idtp idtp;

void init_idt(void);
void load_idt(idtp* pointer);
void init_idt_table(void);
void add_to_idt(uint16_t num, uint64_t offset, uint16_t selector, uint8_t type);

extern idtp idt_pointer;

#endif