/*
* timer_alarm - alarm system call.
*
* SIGALRM exception is sent to the caller task when specified
* delay time is passed. If "msec" argument is 0, stop the
* current running timer.
*/
int
timer_alarm(u_long msec, u_long *remain)
{
struct timer *tmr;
u_long left = 0;
int s;
s = splhigh();
tmr = &curtask->alarm;
/*
* If the timer is active, save the remaining time
* before we update the timer setting.
*/
if (tmr->state == TM_ACTIVE)
left = hztoms(time_remain(tmr->expire));
if (msec == 0)
timer_stop(tmr);
else
timer_callout(tmr, msec, &alarm_expire, curtask);
splx(s);
if (remain != NULL) {
if (copyout(&left, remain, sizeof(left)))
return EFAULT;
}
return 0;
}
/*
* timer_delay - delay thread execution.
*
* The caller thread is blocked for the specified time.
* Returns 0 on success, or the remaining time (msec) on
* failure.
*/
u_long
timer_delay(u_long msec)
{
struct timer *tmr;
u_long remain = 0;
int rc;
rc = sched_tsleep(&delay_event, msec);
if (rc != SLP_TIMEOUT) {
tmr = &curthread->timeout;
remain = hztoms(time_remain(tmr->expire));
}
return remain;
}
static void
acpicpu_cstate_idle_enter(struct acpicpu_softc *sc, int state)
{
struct acpicpu_cstate *cs = &sc->sc_cstate[state];
uint32_t end, start, val;
start = acpitimer_read_fast(NULL);
switch (cs->cs_method) {
case ACPICPU_C_STATE_FFH:
case ACPICPU_C_STATE_HALT:
acpicpu_md_cstate_enter(cs->cs_method, state);
break;
case ACPICPU_C_STATE_SYSIO:
(void)AcpiOsReadPort(cs->cs_addr, &val, 8);
break;
}
cs->cs_evcnt.ev_count++;
end = acpitimer_read_fast(NULL);
sc->sc_cstate_sleep = hztoms(acpitimer_delta(end, start)) * 1000;
}
