42_KFS/headers/idt.h

#pragma once

#include "types.h"
#include <stdint.h>

// doc : https://wiki.osdev.org/Interrupt_Descriptor_Table#IDTR
struct idt_descriptor {
	u16 size;
	u32 offset;
} __attribute__((packed));

struct idt_entry {
	u16 isr_low;   // The lower 16 bits of the ISR's address
	u16 kernel_cs; // The GDT segment selector that the CPU will load
	                    // into CS before calling the ISR
	u8 reserved;   // Set to zero
	u8 attributes; // Type and attributes; see the IDT page
	u16 isr_high;  // The higher 16 bits of the ISR's address
} __attribute__((packed));

#define IDT_SIZE 256

void init_idt(void);