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Use a soft interrupt scheme to schedule schedclock(), so we can make 

splsched() less than splhigh().
This commit is contained in:
pk 2002-12-31 15:57:26 +00:00
parent 67e16e38a4
commit 3d8def4865
1 changed files with 25 additions and 1 deletions
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26
sys/arch/sparc/sparc/timer_sun4m.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: timer_sun4m.c,v 1.2 2002/12/06 17:45:40 pk Exp $ */
/* $NetBSD: timer_sun4m.c,v 1.3 2002/12/31 15:57:26 pk Exp $ */
/*
* Copyright (c) 1992, 1993
@ -74,6 +74,7 @@ struct timer_4m *timerreg4m;
#define counterreg4m cpuinfo.counterreg_4m
static int timerok;
static void *sched_cookie; /* for schedclock() interrupts */
/*
* Set up the real-time and statistics clocks.
@ -155,9 +156,26 @@ statintr_4m(void *cap)
* interrupt was raised.
*/
counterreg4m->t_limit_nr = tmr_ustolim4m(newint);
/*
* The factor 8 is only valid for stathz==100. For other
* values we should compute a mask, approx.
* mask = round_power2(stathz / schedhz) - 1
*/
if (curproc && (++cpuinfo.ci_schedstate.spc_schedticks & 7) == 0)
raise_ipi(&cpuinfo, IPL_SCHED);
return (1);
}
static void schedintr(void *v)
{
struct proc *p = curproc;
if (p != NULL)
schedclock(p);
}
void
timerattach_obio_4m(struct device *parent, struct device *self, void *aux)
{
@ -221,5 +239,11 @@ timerattach_obio_4m(struct device *parent, struct device *self, void *aux)
timerattach(&counterreg4m->t_counter, &counterreg4m->t_limit);
/* Establish a soft interrupt at a lower level for schedclock */
sched_cookie = softintr_establish(IPL_SCHED, schedintr, NULL);
if (sched_cookie == NULL)
return;
schedhz = 12;
timerok = 1;
}