From: Olof Johansson <olof@lixom.net>
Date: Wed, 7 Nov 2007 15:31:06 +0000 (-0600)
Subject: [POWERPC] pasemi: Move cpus to hold loop before restart
X-Git-Tag: v2.6.25-rc1~1131^2~360^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=32e2b55eec7116a859b384dbcc4b52a54a156869;p=platform%2Fkernel%2Flinux-exynos.git

[POWERPC] pasemi: Move cpus to hold loop before restart

Use smp_send_stop() to move all cpus besides the one executing reboot
into a hold loop, to keep them from being in powersavings mode at the
time of reboot.

Signed-off-by: Olof Johansson <olof@lixom.net>
---

diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index bd85853..2b63865 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -43,6 +43,10 @@
 
 #include "pasemi.h"
 
+#if !defined(CONFIG_SMP)
+static void smp_send_stop(void) {}
+#endif
+
 /* SDC reset register, must be pre-mapped at reset time */
 static void __iomem *reset_reg;
 
@@ -60,6 +64,9 @@ static int num_mce_regs;
 
 static void pas_restart(char *cmd)
 {
+	/* Need to put others cpu in hold loop so they're not sleeping */
+	smp_send_stop();
+	udelay(10000);
 	printk("Restarting...\n");
 	while (1)
 		out_le32(reset_reg, 0x6000000);