#include "idt.h"
static struct idtEntry    idt[IDT_NUM];


int idtSetup()
{
  struct idtRegister idtr;

  for (int i = 0; i < IDT_NUM; i++) {
	  struct idtEntry *idte = idt + i;

	  /* Setup an empty IDTE interrupt gate, see figure 5-2 in Intel
	     x86 doc, vol 3 */
	  idte->seg_sel     = BUILD_SEGMENT_SELECTOR(RING_0, 0, SEGMENT_IDX_CODE);
	  idte->reserved    = 0;
	  idte->flags       = 0;
	  idte->type	      = 0x6; /* Interrupt gate (110b) */
	  idte->op_size     = 1;   /* 32bits instructions */

    /* Disabled it for now */
	  idte->zero	      = 0;
	  idte->offset_low  = 0;
	  idte->offset_high = 0;
	  idte->dpl	        = 0;
	  idte->present     = 0; 
  }

  /*
   * Setup the IDT register, see Intel x86 doc vol 3, section 5.8.
   */

  /* Address of the IDT */
  idtr.base_addr  = (uint32_t) idt;

  /* The limit is the maximum offset in bytes from the base address of
     the IDT */
  idtr.limit      = sizeof(idt) - 1;

  /* Commit the IDT into the CPU */
  asm volatile ("lidt %0\n"::"m"(idtr):"memory");
  
  return 0;
}