m68knommu: disable cache early in startup for ColdFire

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>

diff --git a/arch/m68k/platform/coldfire/head.S b/arch/m68k/platform/coldfire/head.S
index c33483824a2eed3573c6d1c8b1c07545b136a800..49666b4dd0914390c0f7da13234e05c07dfdbc7a 100644 (file)
--- 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? */