#include "timer.h"
#include "portio.h"

void timer_init(u32_t freq)
{
    /* how many ticks the PIT must wait before issuing an interrupt */
    u32_t wait = 1193180 / freq;
    outportb(0x43, 0x34);
    outportb(0x40, wait);       /* LSB */
    outportb(0x40, wait >> 8);  /* MSB */
}