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Handle IST_LEVEL interrupts better. Disable interrupt while it is

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processed and enable afterwards.  Up to now IST_LEVEL interrupts always
fired again during processing leaving unnecessary pending interrupts.

Tested on EXPLORA451.

Ok: Simon Burge <simonb@netbsd.org>
This commit is contained in:
hannken 2007-07-24 15:22:18 +00:00
parent 6409dfa660
commit 40135c9d50
1 changed files with 10 additions and 3 deletions
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13
sys/arch/powerpc/ibm4xx/intr.c
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@ -1,4 +1,4 @@
/* $NetBSD: intr.c,v 1.16 2007/02/15 15:14:57 ad Exp $ */
/* $NetBSD: intr.c,v 1.17 2007/07/24 15:22:18 hannken Exp $ */
/*
* Copyright 2002 Wasabi Systems, Inc.
@ -36,7 +36,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.16 2007/02/15 15:14:57 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.17 2007/07/24 15:22:18 hannken Exp $");
#include <sys/param.h>
#include <sys/malloc.h>
@ -255,6 +255,8 @@ ext_intr(void)
disable_irq(i);
} else {
splraise(intrs[i].is_mask);
if (intrs[i].is_type == IST_LEVEL)
disable_irq(i);
wrteei(1);
KERNEL_LOCK(1, NULL);
@ -266,6 +268,8 @@ ext_intr(void)
KERNEL_UNLOCK_ONE(NULL);
mtmsr(msr);
if (intrs[i].is_type == IST_LEVEL)
enable_irq(i);
ci->ci_cpl = pcpl;
uvmexp.intrs++;
intrs[i].is_evcnt.ev_count++;
@ -554,7 +558,8 @@ do_pending_int(void)
again:
while ((hwpend = ci->ci_ipending & ~pcpl & MASK_HARDINTR) != 0) {
irq = IRQ_OF_MASK(hwpend);
enable_irq(irq);
if (intrs[irq].is_type != IST_LEVEL)
enable_irq(irq);
ci->ci_ipending &= ~IRQ_TO_MASK(irq);
@ -570,6 +575,8 @@ do_pending_int(void)
KERNEL_UNLOCK_ONE(NULL);
wrteei(0);
if (intrs[irq].is_type == IST_LEVEL)
enable_irq(irq);
ci->ci_cpl = pcpl;
intrs[irq].is_evcnt.ev_count++;
}