From 368dd5acd154b09c043cc4392a74da01599b37d5 Mon Sep 17 00:00:00 2001
From: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Date: Wed, 27 Oct 2010 17:28:55 +0100
Subject: MN10300: And Panasonic AM34 subarch and implement SMP

Implement the Panasonic MN10300 AM34 CPU subarch and implement SMP support for
MN10300.  Also implement support for the MN2WS0060 processor and the ASB2364
evaluation board which are AM34 based.

Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
---
 arch/mn10300/boot/compressed/head.S | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'arch/mn10300/boot')

diff --git a/arch/mn10300/boot/compressed/head.S b/arch/mn10300/boot/compressed/head.S
index 4ef608a62416..7b50345b9e84 100644
--- a/arch/mn10300/boot/compressed/head.S
+++ b/arch/mn10300/boot/compressed/head.S
@@ -15,10 +15,28 @@
 #include <linux/linkage.h>
 #include <asm/cpu-regs.h>
 #include <asm/cache.h>
+#ifdef CONFIG_SMP
+#include <proc/smp-regs.h>
+#endif
 
 	.globl startup_32
 startup_32:
-	# first save off parameters from bootloader
+#ifdef CONFIG_SMP
+	#
+	# Secondary CPUs jump directly to the kernel entry point
+	#
+	# Must save primary CPU's D0-D2 registers as they hold boot parameters
+	#
+	mov	(CPUID), d3
+	and	CPUID_MASK,d3
+	beq	startup_primary
+	mov	CONFIG_KERNEL_TEXT_ADDRESS,a0
+	jmp	(a0)
+
+startup_primary:
+#endif /* CONFIG_SMP */
+
+	# first save parameters from bootloader
 	mov	param_save_area,a0
 	mov	d0,(a0)
 	mov	d1,(4,a0)
-- 
cgit