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[Qemu-devel] sparc32 do not clear interrupts when masking
From: |
Artyom Tarasenko |
Subject: |
[Qemu-devel] sparc32 do not clear interrupts when masking |
Date: |
Fri, 15 Jan 2010 23:37:30 +0100 |
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 <address@hidden>
---
diff --git a/hw/slavio_intctl.c b/hw/slavio_intctl.c
index 9aff892..b76d3ac 100644
--- a/hw/slavio_intctl.c
+++ b/hw/slavio_intctl.c
@@ -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);
- [Qemu-devel] sparc32 do not clear interrupts when masking,
Artyom Tarasenko <=