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From 4ea81210af681a20d425b52d42285e8c729b6f75 Mon Sep 17 00:00:00 2001
From: J. Aaron Gamble <john.gamble@windriver.com>
Date: Wed, 22 Sep 2010 11:20:03 -0400
Subject: [PATCH] qemu/powerpc: Added qemu_restart() function
qemu_restart code taken from:
http://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg03147.html
Updated qemu machine description to use this function
Signed-off-by: J. Aaron Gamble <john.gamble@windriver.com>
---
arch/powerpc/platforms/qemu/setup.c | 18 +++++++++++++++++-
1 files changed, 17 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/platforms/qemu/setup.c b/arch/powerpc/platforms/qemu/setup.c
index 2d1ecf2..1f37f71 100644
--- a/arch/powerpc/platforms/qemu/setup.c
+++ b/arch/powerpc/platforms/qemu/setup.c
@@ -159,6 +159,22 @@ static int __init qemu_probe(void)
return 1;
}
+void qemu_restart(char *cmd)
+{
+ local_irq_disable(); /* no interrupts */
+ /* set exception prefix high - to the prom */
+ mtmsr(mfmsr() | MSR_IP);
+
+ /* make sure bit 0 (reset) is a 0 */
+ outb(inb(0x92) & ~1L, 0x92);
+ /* signal a reset to system control port A - soft reset */
+ outb(inb(0x92) | 1, 0x92);
+
+ while(1);
+
+ /* not reached */
+}
+
define_machine(qemu) {
.name = "QEMU",
.probe = qemu_probe,
@@ -167,7 +183,7 @@ define_machine(qemu) {
.show_cpuinfo = qemu_ibm_cpuinfo,
.init_IRQ = qemu_init_IRQ,
/* .pcibios_fixup = qemu_pcibios_fixup, */
-/* .restart = qemu_restart, */
+ .restart = qemu_restart,
/* .power_off = qemu_halt, */
/* .halt = qemu_halt, */
/* .time_init = todc_time_init, */
--
1.6.5.2
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