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[Qemu-devel] [PATCH] sparc32 irq clearing (guest Solaris performance+Net
From: |
Artyom Tarasenko |
Subject: |
[Qemu-devel] [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix |
Date: |
Sat, 14 Nov 2009 02:03:38 +0100 |
According to NCR89C105 documentation
http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
Interrupts are cleared by disabling and then re-enabling them.
This patch implements the specified behaviour. The most visible effects:
- NetBSD 1.3.3 - 1.5.3 boots successfully
- Solaris 2.5.1 - 7 boots ~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 9680392..779c661 100644
--- a/hw/slavio_intctl.c
+++ b/hw/slavio_intctl.c
@@ -177,19 +177,19 @@ static void slavio_intctlm_mem_writel(void
*opaque, target_phys_addr_t addr,
saddr = addr >> 2;
DPRINTF("write system reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
switch (saddr) {
- case 2: // clear (enable)
+ case 2: // clear (enable, clear formerly disabled pending)
// Force clear unused bits
val &= MASTER_IRQ_MASK;
+ s->intregm_pending &= (s->intregm_disabled & val);
s->intregm_disabled &= ~val;
DPRINTF("Enabled master irq mask %x, curmask %x\n", val,
s->intregm_disabled);
slavio_check_interrupts(s, 1);
break;
- case 3: // set (disable, clear pending)
+ case 3: // set (disable, do not clear 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);
0001-slavio-clear-pending-on-enable.patch
Description: Binary data
- [Qemu-devel] [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix,
Artyom Tarasenko <=
- [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Blue Swirl, 2009/11/14
- [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Artyom Tarasenko, 2009/11/14
- [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Blue Swirl, 2009/11/15
- [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Artyom Tarasenko, 2009/11/16
- [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Blue Swirl, 2009/11/16
- [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Artyom Tarasenko, 2009/11/16
- [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Blue Swirl, 2009/11/16
- Re: [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Jamie Lokier, 2009/11/16
- [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Artyom Tarasenko, 2009/11/16
- Re: [Qemu-devel] Re: [PATCH] sparc32 irq clearing (guest Solaris performance+NetBSD) fix, Jamie Lokier, 2009/11/16