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authorGreg Ungerer <gerg@uclinux.org>2011-11-23 14:46:36 +1000
committerGreg Ungerer <gerg@uclinux.org>2012-03-05 09:43:03 +1000
commit10cb54de2c97847cd5b6b2df4e8b359e65266181 (patch)
tree9eb0389f0b913573b8f3fbcd827b814f4571d5b7
parent192cfd58774b4d17b2fe8bdc77d89c2ef4e0591d (diff)
m68knommu: hard set the ColdFire MBAR register on startup
The ColdFire MBAR register that holds the mapping of the peripheral region on some ColdFire CPUs is configurable. It can be configured at some address different to that of the bootloader that loaded the kernel. So hard set the MBAR register mapping at kernel startup time. Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
-rw-r--r--arch/m68k/platform/coldfire/head.S4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/m68k/platform/coldfire/head.S b/arch/m68k/platform/coldfire/head.S
index 38f04a3f620..c3db70ed33b 100644
--- a/arch/m68k/platform/coldfire/head.S
+++ b/arch/m68k/platform/coldfire/head.S
@@ -158,6 +158,10 @@ _start:
#if defined(CONFIG_UBOOT)
movel %sp,_init_sp /* save initial stack pointer */
#endif
+#ifdef CONFIG_MBAR
+ movel #CONFIG_MBAR+1,%d0 /* configured MBAR address */
+ movec %d0,%MBAR /* set it */
+#endif
/*
* Do any platform or board specific setup now. Most boards