/*
* Level 14 (stat clock) interrupts from processor counter.
*/
int
statintr_4m(void *cap)
{
struct clockframe *frame = cap;
u_long newint;
kpreempt_disable();
/* read the limit register to clear the interrupt */
*((volatile int *)&counterreg4m->t_limit);
statclock(frame);
/*
* Compute new randomized interval.
*/
newint = new_interval();
/*
* Use the `non-resetting' limit register, so we don't
* loose the counter ticks that happened since this
* interrupt was raised.
*/
counterreg4m->t_limit_nr = tmr_ustolim4m(newint);
/*
* The factor 8 is only valid for stathz==100.
* See also clock.c
*/
if ((++cpuinfo.ci_schedstate.spc_schedticks & 7) == 0 && schedhz != 0) {
if (CLKF_LOPRI(frame, IPL_SCHED)) {
/* No need to schedule a soft interrupt */
spllowerschedclock();
schedintr(cap);
} else {
/*
* We're interrupting a thread that may have the
* scheduler lock; run schedintr() on this CPU later.
*/
raise_ipi(&cpuinfo, IPL_SCHED); /* sched_cookie->pil */
}
}
kpreempt_enable();
return (1);
}
/*
* Level 14 (stat clock) interrupts from processor counter.
*/
int
statintr_4(void *cap)
{
struct clockframe *frame = cap;
u_long newint;
/* read the limit register to clear the interrupt */
*((volatile int *)&timerreg4->t_c14.t_limit);
statclock(frame);
/*
* Compute new randomized interval.
*/
newint = new_interval();
/*
* The sun4/4c timer has no `non-resetting' register;
* use the current counter value to compensate the new
* limit value for the number of counter ticks elapsed.
*/
newint -= tmr_cnttous(timerreg4->t_c14.t_counter);
timerreg4->t_c14.t_limit = tmr_ustolim(newint);
/*
* The factor 8 is only valid for stathz==100.
* See also clock.c
*/
if (curlwp && (++cpuinfo.ci_schedstate.spc_schedticks & 7) == 0) {
if (CLKF_LOPRI(frame, IPL_SCHED)) {
/* No need to schedule a soft interrupt */
spllowerschedclock();
schedintr(cap);
} else {
/*
* We're interrupting a thread that may have the
* scheduler lock; run schedintr() later.
*/
sparc_softintr_schedule(sched_cookie);
}
}
return (1);
}