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sparc32 do not clear interrupts when masking 

Don't clear interrupts on disabling, because
* Sun4M_SystemArchitecture_edited2.pdf doesn't describe
  that masking or un-masking IRQ shall clear pending ones.

* Field tests also show that SPARCstation-20 doesn't
  clear them.

* The patch makes Solaris 2.5.1/2.6 boot ~1500 times
  faster (~20 seconds instead of ~8 hours)

Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Artyom Tarasenko 2010-01-16 09:06:32 +00:00 committed by Blue Swirl
parent 694b930946
commit 10760f0fa7
1 changed files with 1 additions and 2 deletions
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3
hw/slavio_intctl.c
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@ -185,11 +185,10 @@ static void slavio_intctlm_mem_writel(void *opaque, target_phys_addr_t addr,
s->intregm_disabled);
slavio_check_interrupts(s, 1);
break;
case 3: // set (disable, clear pending)
case 3: // set (disable; doesn't affect pending)
// Force clear unused bits
val &= MASTER_IRQ_MASK;
s->intregm_disabled |= val;
s->intregm_pending &= ~val;
slavio_check_interrupts(s, 1);
DPRINTF("Disabled master irq mask %x, curmask %x\n", val,
s->intregm_disabled);