Function rtcin

freebsd/x86/isa/atrtc.c:122–131

}

int
rtcin(int reg)
{
	u_char val;

	mtx_lock_spin(&atrtc_lock);
	val = rtcin_locked(reg);
	mtx_unlock_spin(&atrtc_lock);
	return (val);
}

void
writertc(int reg, u_char val)