#include "idt.h"
#include "system.h"

struct idt_entry
{
	unsigned short base_lo;
	unsigned short sel;
	unsigned char always0;
	unsigned char flags;
	unsigned short base_hi;
} __attribute__((packed));

struct idt_ptr
{
	unsigned short limit;
	unsigned int base;
} __attribute__((packed));

struct idt_entry idt[256];
struct idt_ptr idtp;

extern void idt_load();

void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags)
{
	idt[num].base_lo = (base & 0xFFFF);
	idt[num].base_hi = (base >> 16) & 0xFFFF;

	idt[num].sel = sel;
	idt[num].always0 = 0;
	idt[num].flags = flags;
}

void idt_install()
{
	idtp.limit = (sizeof (struct idt_entry)*256) - 1;
	idtp.base = (unsigned int)&idt;

	memset(&idt, 0, sizeof(struct idt_entry)*256);

	idt_load();
}