#include "idt.h"
#include <sys/config.h>

#include <sys/mm/mem.h>

#include <drivers/vesa/vesa.h>

struct idt_desc idt_descriptors[KINL_TOTAL_INTERRUPTS];
struct idtr_desc idtr_descriptor;

extern void idt_load (void *ptr);

void
idt_zero ()
{
  terminal_print ("Divide by zero error\n");
}

void
idt_set (int interrupt_no, void *address)
{
  struct idt_desc *desc = &idt_descriptors[interrupt_no];
  desc->offset_1 = (u32)address & 0x0000ffff;
  desc->selector = KERNEL_CODE_SELECTOR;
  desc->zero = 0x00;
  desc->type_attribute = 0xee;
  desc->offset_2 = (u32)address >> 16;
}

void
idt_init ()
{
  memset (idt_descriptors, 0, sizeof (idt_descriptors));
  idtr_descriptor.limit = sizeof (idt_descriptors) - 1;
  idtr_descriptor.base = (u32)idt_descriptors;

  idt_set (0, idt_zero);

  // Load the interrupt descriptor table
  idt_load (&idtr_descriptor);
}