#ifndef _IDT_H
#define _IDT_H

#include <stddef.h>
#include <stdint.h>

#define KERNEL_CODE_SEGMENT_OFFSET  0x08
#define INTERRUPT_GATE              0x8e

// https://wiki.osdev.org/Interrupt_Descriptor_Table
struct interrupt_descriptor_32 {
    uint16_t offset_1;        // offset bits 0..15
    uint16_t selector;        // a code segment selector in GDT or LDT
    uint8_t  zero;            // unused, set to 0
    uint8_t  type_attributes; // gate type, dpl, and p fields
    uint16_t offset_2;        // offset bits 16..31
} __attribute__((__packed__)); 

struct interrupt_frame_32 {
    size_t ip;
    size_t cs;
    size_t flags;
    size_t sp;
    size_t ss;
} __attribute__((__packed__)); 

void idt_init(void);
void idt_register_handler(uint8_t interrupt, size_t address);

#endif