summaryrefslogtreecommitdiffstats
path: root/arch/mn10300/boot
diff options
context:
space:
mode:
authorAkira Takeuchi <takeuchi.akr@jp.panasonic.com>2010-10-27 17:28:55 +0100
committerDavid Howells <dhowells@redhat.com>2010-10-27 17:28:55 +0100
commit368dd5acd154b09c043cc4392a74da01599b37d5 (patch)
treedd94ae3d044f6e774dec2437613515bd6b46dacb /arch/mn10300/boot
parent04157a6e7df99fd5ed64955233d6e00ab6613614 (diff)
downloadop-kernel-dev-368dd5acd154b09c043cc4392a74da01599b37d5.zip
op-kernel-dev-368dd5acd154b09c043cc4392a74da01599b37d5.tar.gz
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>
Diffstat (limited to 'arch/mn10300/boot')
-rw-r--r--arch/mn10300/boot/compressed/head.S20
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/mn10300/boot/compressed/head.S b/arch/mn10300/boot/compressed/head.S
index 4ef608a..7b50345 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)
OpenPOWER on IntegriCloud