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Commit ec841187 authored by Greg Ungerer's avatar Greg Ungerer
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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: default avatarAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: default avatarGreg Ungerer <gerg@uclinux.org>
parent 84f3fb7a

arch/m68k/platform/coldfire/head.S

+3 −3
Original line number Diff line number Diff line
@@ -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? */