From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 include/asm-m68knommu/mcfcache.h | 125 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 include/asm-m68knommu/mcfcache.h

(limited to 'include/asm-m68knommu/mcfcache.h')

diff --git a/include/asm-m68knommu/mcfcache.h b/include/asm-m68knommu/mcfcache.h
new file mode 100644
index 000000000000..bdd8c53ef34c
--- /dev/null
+++ b/include/asm-m68knommu/mcfcache.h
@@ -0,0 +1,125 @@
+/****************************************************************************/
+
+/*
+ *	mcfcache.h -- ColdFire CPU cache support code
+ *
+ *	(C) Copyright 2004, Greg Ungerer <gerg@snapgear.com>
+ */
+
+/****************************************************************************/
+#ifndef	__M68KNOMMU_MCFCACHE_H
+#define	__M68KNOMMU_MCFCACHE_H
+/****************************************************************************/
+
+#include <linux/config.h>
+
+/*
+ *	The different ColdFire families have different cache arrangments.
+ *	Everything from a small instruction only cache, to configurable
+ *	data and/or instruction cache, to unified instruction/data, to 
+ *	harvard style separate instruction and data caches.
+ */
+
+#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || defined(CONFIG_M5272)
+/*
+ *	Simple version 2 core cache. These have instruction cache only,
+ *	we just need to invalidate it and enable it.
+ */
+.macro CACHE_ENABLE
+	movel	#0x01000000,%d0		/* invalidate cache cmd */
+	movec	%d0,%CACR		/* do invalidate cache */
+	movel	#0x80000100,%d0		/* setup cache mask */
+	movec	%d0,%CACR		/* enable cache */
+.endm
+#endif /* CONFIG_M5206 || CONFIG_M5206e || CONFIG_M5272 */
+
+#if defined(CONFIG_M527x)
+/*
+ *	New version 2 cores have a configurable split cache arrangement.
+ *	For now I am just enabling instruction cache - but ultimately I
+ *	think a split instruction/data cache would be better.
+ */
+.macro CACHE_ENABLE
+	movel	#0x01400000,%d0
+	movec	%d0,%CACR		/* invalidate cache */
+	nop
+	movel	#0x0000c000,%d0		/* set SDRAM cached only */
+	movec	%d0,%ACR0
+	movel	#0x00000000,%d0		/* no other regions cached */
+	movec	%d0,%ACR1
+	movel	#0x80400100,%d0		/* configure cache */
+	movec	%d0,%CACR		/* enable cache */
+	nop
+.endm
+#endif /* CONFIG_M527x */
+
+#if defined(CONFIG_M528x)
+/*
+ *	Cache is totally broken on early 5282 silicon. So far now we
+ *	disable its cache all together.
+ */
+.macro CACHE_ENABLE
+	movel	#0x01000000,%d0
+	movec	%d0,%CACR		/* invalidate cache */
+	nop
+	movel	#0x0000c000,%d0		/* set SDRAM cached only */
+	movec	%d0,%ACR0
+	movel	#0x00000000,%d0		/* no other regions cached */
+	movec	%d0,%ACR1
+	movel	#0x00000000,%d0		/* configure cache */
+	movec	%d0,%CACR		/* enable cache */
+	nop
+.endm
+#endif /* CONFIG_M528x */
+
+#if defined(CONFIG_M5249) || defined(CONFIG_M5307)
+/*
+ *	The version 3 core cache. Oddly enough the version 2 core 5249
+ *	has the same SDRAM and cache setup as the version 3 cores.
+ *	This is a single unified instruction/data cache.
+ */
+.macro CACHE_ENABLE
+	movel	#0x01000000,%d0		/* invalidate whole cache */
+	movec	%d0,%CACR
+	nop
+#if defined(DEBUGGER_COMPATIBLE_CACHE) || defined(CONFIG_SECUREEDGEMP3)
+	movel	#0x0000c000,%d0		/* set SDRAM cached (write-thru) */
+#else
+	movel	#0x0000c020,%d0		/* set SDRAM cached (copyback) */
+#endif
+	movec	%d0,%ACR0
+	movel	#0x00000000,%d0		/* no other regions cached */
+	movec	%d0,%ACR1
+	movel	#0xa0000200,%d0		/* enable cache */
+	movec	%d0,%CACR
+	nop
+.endm
+#endif /* CONFIG_M5249 || CONFIG_M5307 */
+
+#if defined(CONFIG_M5407)
+/*
+ *	Version 4 cores have a true harvard style separate instruction
+ *	and data cache. Invalidate and enable cache, also enable write
+ *	buffers and branch accelerator.
+ */
+.macro CACHE_ENABLE
+	movel	#0x01040100,%d0		/* invalidate whole cache */
+	movec	%d0,%CACR
+	nop
+	movel	#0x000fc000,%d0		/* set SDRAM cached only */
+	movec	%d0, %ACR0
+	movel	#0x00000000,%d0		/* no other regions cached */
+	movec	%d0, %ACR1
+	movel	#0x000fc000,%d0		/* set SDRAM cached only */
+	movec	%d0, %ACR2
+	movel	#0x00000000,%d0		/* no other regions cached */
+	movec	%d0, %ACR3
+	movel	#0xb6088400,%d0		/* enable caches */
+	movec	%d0,%CACR
+	nop
+.endm
+#endif /* CONFIG_M5407 */
+
+
+/****************************************************************************/
+#endif	/* __M68KNOMMU_MCFCACHE_H */
-- 
cgit v1.2.3