Commit 8a6e43e9 authored by Greg Ungerer's avatar Greg Ungerer Committed by Linus Torvalds
Browse files

[PATCH] m68knommu: cache support for 523x/528x processors 



Add support for the cache of the ColdFIre 523x family of processors.
Enable the 528x cache by default now, all final shipping silicon
has the cache bug fixed.

Signed-off-by: default avatarGreg Ungerer <gerg@uclinux.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 7dd6a2aa

include/asm-m68knommu/mcfcache.h

+11 −14
Original line number Original line Diff line number Diff line
@@ -33,7 +33,7 @@ 
.endm

.endm

#endif /* CONFIG_M5206 || CONFIG_M5206e || CONFIG_M5272 */

#endif /* CONFIG_M5206 || CONFIG_M5206e || CONFIG_M5272 */





#if defined(CONFIG_M527x)

#if defined(CONFIG_M523x) || defined(CONFIG_M527x)

/*

/*

 *	New version 2 cores have a configurable split cache arrangement.

 *	New version 2 cores have a configurable split cache arrangement.

 *	For now I am just enabling instruction cache - but ultimately I

 *	For now I am just enabling instruction cache - but ultimately I
@@ -51,23 +51,20 @@ 
	movec	%d0,%CACR		/* enable cache */

	movec	%d0,%CACR		/* enable cache */

	nop

	nop

.endm

.endm

#endif /* CONFIG_M527x */

#endif /* CONFIG_M523x || CONFIG_M527x */





#if defined(CONFIG_M528x)

#if defined(CONFIG_M528x)

/*

 *	Cache is totally broken on early 5282 silicon. So far now we

 *	disable its cache all together.

 */

.macro CACHE_ENABLE

.macro CACHE_ENABLE

	nop

	movel	#0x01000000, %d0

	movel	#0x01000000, %d0

	movec	%d0,%CACR		/* invalidate cache */

	movec	%d0, %CACR		/* Invalidate cache */

	nop

	nop

	movel	#0x0000c000,%d0		/* set SDRAM cached only */

	movel	#0x0000c020, %d0	/* Set SDRAM cached only */

	movec	%d0, %ACR0

	movec	%d0, %ACR0

	movel	#0x00000000,%d0		/* no other regions cached */

	movel	#0xff00c000, %d0	/* Cache Flash also */

	movec	%d0, %ACR1

	movec	%d0, %ACR1

	movel	#0x00000000,%d0		/* configure cache */

	movel	#0x80000200, %d0	/* Setup cache mask */

	movec	%d0,%CACR		/* enable cache */

	movec	%d0, %CACR		/* Enable cache */

	nop

	nop

.endm

.endm

#endif /* CONFIG_M528x */

#endif /* CONFIG_M528x */