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Date: Thu, 05 Jul 2007 12:02:51 -0500
From: Olof Johansson <olof@lixom.net>
To: linuxppc-dev@ozlabs.org
Subject: [patch 18/35] Spread IRQs among cpus by default
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Spread IRQs between the two cores on our openpic. Without this,
they get delivered to cpu 0 as long as it's available.

This needs a bit more cleanup -- it needs a flag so it can coexist
with other implementations.

Index: 2.6.21/arch/powerpc/sysdev/mpic.c
===================================================================
--- 2.6.21.orig/arch/powerpc/sysdev/mpic.c
+++ 2.6.21/arch/powerpc/sysdev/mpic.c
@@ -1191,6 +1191,11 @@ void __init mpic_init(struct mpic *mpic)
 			   mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
 			   | MPIC_GREG_GCONF_8259_PTHROU_DIS);
 
+	mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
+		   mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
+		   | 0x10000000);
+
+
 	/* Set current processor priority to 0 */
 	mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0);
 }

--