void
startrtclock()
{
findcpuspeed(); /* use the clock (while it's free)
to find the cpu speed */
}
startrtclock() {
int s;
findcpuspeed(); /* use the clock (while it's free)
to find the cpu speed */
/* initialize 8253 clock */
outb(TIMER_MODE, TIMER_SEL0|TIMER_RATEGEN|TIMER_16BIT);
/* Correct rounding will buy us a better precision in timekeeping */
outb (IO_TIMER1, (XTALSPEED+hz/2)/hz);
outb (IO_TIMER1, ((XTALSPEED+hz/2)/hz)/256);
/* initialize brain-dead battery powered clock */
outb (IO_RTC, RTC_STATUSA);
outb (IO_RTC+1, 0x26);
outb (IO_RTC, RTC_STATUSB);
outb (IO_RTC+1, 2);
outb (IO_RTC, RTC_DIAG);
if (s = inb (IO_RTC+1))
printf("RTC BIOS diagnostic error %b\n", s, RTCDG_BITS);
outb (IO_RTC, RTC_DIAG);
outb (IO_RTC+1, 0);
}
void
startrtclock(void)
{
findcpuspeed(); /* use the clock (while it's free) to
find the CPU speed */
timer0count.lo = 0;
timer0count.hi = 0;
timer0_at_last_clockintr.lo = 0;
timer0_at_last_clockintr.hi = 0;
timer0last = 0;
/* initialize 8253 clock */
outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0|TIMER_RATEGEN|TIMER_16BIT);
outb(IO_TIMER1 + TIMER_CNTR0, TIMER0_ROLLOVER % 256);
outb(IO_TIMER1 + TIMER_CNTR0, TIMER0_ROLLOVER / 256);
#ifdef TESTHAT
hatCount = timer_hz_to_count(HATHZ);
hatCount2 = timer_hz_to_count(HATHZ2);
printf("HAT test on @ %d Hz = %d ticks\n", HATHZ, hatCount);
#endif
}
