From: <gerg@snapgear.com>
To: linux-m68k@vger.kernel.org, uclinux-dev@uclinux.org
Cc: Greg Ungerer <gerg@uclinux.org>,
Alexander Stein <alexander.stein@systec-electronic.com>
Subject: [PATCH] m68knommu: disable cache early in startup for ColdFire
Date: Fri, 18 Nov 2011 16:32:12 +1000 [thread overview]
Message-ID: <1321597932-23734-1-git-send-email-gerg@snapgear.com> (raw)
From: Greg Ungerer <gerg@uclinux.org>
Disbale the CPU cache really early in the ColdFire startup code. We set
up some variables for RAM sizing and we want to make they stick in RAM.
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
---
arch/m68k/platform/coldfire/head.S | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/m68k/platform/coldfire/head.S b/arch/m68k/platform/coldfire/head.S
index c334838..49666b4 100644
--- a/arch/m68k/platform/coldfire/head.S
+++ b/arch/m68k/platform/coldfire/head.S
@@ -143,6 +143,9 @@ __HEAD
_start:
nop /* filler */
movew #0x2700, %sr /* no interrupts */
+ movel #CACHE_INIT,%d0 /* disable cache */
+ movec %d0,%CACR
+ nop
#if defined(CONFIG_UBOOT)
movel %sp,_init_sp /* save initial stack pointer */
#endif
@@ -176,9 +179,6 @@ _start:
* it is very similar. Define the exact settings in the headers
* then the code here is the same for all.
*/
- movel #CACHE_INIT,%d0 /* invalidate whole cache */
- movec %d0,%CACR
- nop
movel #ACR0_MODE,%d0 /* set RAM region for caching */
movec %d0,%ACR0
movel #ACR1_MODE,%d0 /* anything else to cache? */
--
1.7.0.4
reply other threads:[~2011-11-18 6:30 UTC|newest]
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