linux-kernel - [M68KNOMMU]: fix 528x ColdFire cache settings

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Message-Id: <200802010738.m117cOqk022730@goober>
Date:	Fri, 1 Feb 2008 17:38:24 +1000
From:	Greg Ungerer <gerg@...pgear.com>
To:	torvalds@...ux-foundation.org
Cc:	gerg@...inux.org, linux-kernel@...r.kernel.org
Subject: [M68KNOMMU]: fix 528x ColdFire cache settings

Fix problems with the 528x ColdFire CPU cache setup.
Do not cache the flash region (if present), and make the runtime
settings consistent with the init setting.

Problems pointed out by Bernd Buttner <b.buettner@...-gmbh.de>

Signed-off-by: Greg Ungerer <gerg@...inux.org>
---


diff -Naurp linux-2.6.24/include/asm-m68knommu/cacheflush.h linux-2.6.24-uc0/include/asm-m68knommu/cacheflush.h
--- linux-2.6.24/include/asm-m68knommu/cacheflush.h	2008-01-25 08:58:37.000000000 +1000
+++ linux-2.6.24-uc0/include/asm-m68knommu/cacheflush.h	2007-10-29 16:43:08.000000000 +1000
@@ -53,7 +53,7 @@ static inline void __flush_cache_all(voi
 #endif /* CONFIG_M5407 */
 #if defined(CONFIG_M527x) || defined(CONFIG_M528x)
 	__asm__ __volatile__ (
-        	"movel	#0x81400100, %%d0\n\t"
+		"movel	#0x81000200, %%d0\n\t"
         	"movec	%%d0, %%CACR\n\t"
 		"nop\n\t"
 		: : : "d0" );
diff -Naurp linux-2.6.24/include/asm-m68knommu/mcfcache.h linux-2.6.24-uc0/include/asm-m68knommu/mcfcache.h
--- linux-2.6.24/include/asm-m68knommu/mcfcache.h	2008-01-25 08:58:37.000000000 +1000
+++ linux-2.6.24-uc0/include/asm-m68knommu/mcfcache.h	2007-10-29 16:43:08.000000000 +1000
@@ -60,7 +60,7 @@
 	nop
 	movel	#0x0000c020, %d0	/* Set SDRAM cached only */
 	movec	%d0, %ACR0
-	movel	#0xff00c000, %d0	/* Cache Flash also */
+	movel	#0x00000000, %d0	/* No other regions cached */
 	movec	%d0, %ACR1
 	movel	#0x80000200, %d0	/* Setup cache mask */
 	movec	%d0, %CACR		/* Enable cache */
--
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