#ifndef IDT_H
#define IDT_H

#include <stdint.h>

/* A struct describing an interrupt gate. */
struct idt_entry_struct {
    uint16_t base_lo;             // The lower 16 bits of the address to jump to when this interrupt fires.
    uint16_t sel;                 // Kernel segment selector.
    uint8_t  always0;             // This must always be zero.
    uint8_t  flags;               // More flags. See documentation.
    uint16_t base_hi;             // The upper 16 bits of the address to jump to.
} __attribute__((packed));

typedef struct idt_entry_struct idt_entry_t;

/* A struct describing a pointer to an array of interrupt handlers.
 * This is in a format suitable for giving to 'lidt'. */
struct idt_ptr_struct {
    uint16_t limit;
    uint32_t base;                // The address of the first element in our idt_entry_t array.
} __attribute__((packed));

typedef struct idt_ptr_struct idt_ptr_t;

// These extern directives let us access the addresses of our ASM ISR handlers.
extern void isr0();
extern void isr1();
// ... we will add more later ...

void init_idt();

#endif