#pragma once
#include <stdint.h>

enum {
    IRQ0 = 32,
    IRQ1,
    IRQ2,
    IRQ3,
    IRQ4,
    IRQ5,
    IRQ6,
    IRQ7,
    IRQ8,
    IRQ9,
    IRQ10,
    IRQ11,
    IRQ12,
    IRQ13,
    IRQ14,
    IRQ15,
};

/* Struct which aggregates many registers.
 * It matches exactly the pushes on interrupt.asm. From the bottom:
 * - Pushed by the processor automatically
 * - `push byte`s on the isr-specific code: error code, then int number
 * - All the registers by pusha
 * - `push eax` whose lower 16-bits contain DS
 */
typedef struct {
    uint32_t edi, esi, ebp, esp, ebx, edx, ecx, eax; /* Pushed by pusha. */
    uint32_t gs, fs, es, ds; /* Data segment selector */
    uint32_t int_no, err_code; /* Interrupt number and error code (if applicable) */
    uint32_t eip, cs, eflags, useresp, ss; /* Pushed by the processor automatically */
} registers_t;

void isr_install();

void isr_handler(registers_t *r);

typedef void (*isr_t)(registers_t *);

void register_interrupt_handler(uint8_t n, isr_t handler);

void load_idt();
void cli();
void sti();