42_KFS/headers/idt.h

#pragma once

#include <stdint.h>

// doc : https://wiki.osdev.org/Interrupt_Descriptor_Table#IDTR
struct idt_descriptor {
	uint16_t size;
	uint32_t offset;
} __attribute__((packed));

struct idt_entry {
	uint16_t isr_low;   // The lower 16 bits of the ISR's address
	uint16_t kernel_cs; // The GDT segment selector that the CPU will load
	                    // into CS before calling the ISR
	uint8_t reserved;   // Set to zero
	uint8_t attributes; // Type and attributes; see the IDT page
	uint16_t isr_high;  // The higher 16 bits of the ISR's address
} __attribute__((packed));

#define IDT_SIZE 256

void init_idt(void);