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!
---
 arch/m68knommu/mm/memory.c | 132 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 arch/m68knommu/mm/memory.c

(limited to 'arch/m68knommu/mm/memory.c')

diff --git a/arch/m68knommu/mm/memory.c b/arch/m68knommu/mm/memory.c
new file mode 100644
index 00000000000..0eef72915e6
--- /dev/null
+++ b/arch/m68knommu/mm/memory.c
@@ -0,0 +1,132 @@
+/*
+ *  linux/arch/m68knommu/mm/memory.c
+ *
+ *  Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>,
+ *  Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
+ *
+ *  Based on:
+ *
+ *  linux/arch/m68k/mm/memory.c
+ *
+ *  Copyright (C) 1995  Hamish Macdonald
+ */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/io.h>
+
+/*
+ * cache_clear() semantics: Clear any cache entries for the area in question,
+ * without writing back dirty entries first. This is useful if the data will
+ * be overwritten anyway, e.g. by DMA to memory. The range is defined by a
+ * _physical_ address.
+ */
+
+void cache_clear (unsigned long paddr, int len)
+{
+}
+
+
+/*
+ *	Define cache invalidate functions. The ColdFire 5407 is really
+ *	the only processor that needs to do some work here. Anything
+ *	that has separate data and instruction caches will be a problem.
+ */
+#ifdef CONFIG_M5407
+
+static __inline__ void cache_invalidate_lines(unsigned long paddr, int len)
+{
+	unsigned long	sset, eset;
+
+	sset = (paddr & 0x00000ff0);
+	eset = ((paddr + len) & 0x0000ff0) + 0x10;
+
+	__asm__ __volatile__ (
+		"nop\n\t"
+		"clrl	%%d0\n\t"
+		"1:\n\t"
+		"movel	%0,%%a0\n\t"
+		"addl	%%d0,%%a0\n\t"
+		"2:\n\t"
+		".word	0xf4e8\n\t"
+		"addl	#0x10,%%a0\n\t"
+		"cmpl	%1,%%a0\n\t"
+		"blt	2b\n\t"
+		"addql	#1,%%d0\n\t"
+		"cmpil	#4,%%d0\n\t"
+		"bne	1b"
+		: : "a" (sset), "a" (eset) : "d0", "a0" );
+}
+
+#else
+#define	cache_invalidate_lines(a,b)
+#endif
+
+
+/*
+ * cache_push() semantics: Write back any dirty cache data in the given area,
+ * and invalidate the range in the instruction cache. It needs not (but may)
+ * invalidate those entries also in the data cache. The range is defined by a
+ * _physical_ address.
+ */
+
+void cache_push (unsigned long paddr, int len)
+{
+	cache_invalidate_lines(paddr, len);
+}
+
+
+/*
+ * cache_push_v() semantics: Write back any dirty cache data in the given
+ * area, and invalidate those entries at least in the instruction cache. This
+ * is intended to be used after data has been written that can be executed as
+ * code later. The range is defined by a _user_mode_ _virtual_ address  (or,
+ * more exactly, the space is defined by the %sfc/%dfc register.)
+ */
+
+void cache_push_v (unsigned long vaddr, int len)
+{
+	cache_invalidate_lines(vaddr, len);
+}
+
+/* Map some physical address range into the kernel address space. The
+ * code is copied and adapted from map_chunk().
+ */
+
+unsigned long kernel_map(unsigned long paddr, unsigned long size,
+			 int nocacheflag, unsigned long *memavailp )
+{
+	return paddr;
+}
+
+
+int is_in_rom(unsigned long addr)
+{
+	extern unsigned long _ramstart, _ramend;
+
+	/*
+	 *	What we are really trying to do is determine if addr is
+	 *	in an allocated kernel memory region. If not then assume
+	 *	we cannot free it or otherwise de-allocate it. Ideally
+	 *	we could restrict this to really being in a ROM or flash,
+	 *	but that would need to be done on a board by board basis,
+	 *	not globally.
+	 */
+	if ((addr < _ramstart) || (addr >= _ramend))
+		return(1);
+
+	/* Default case, not in ROM */
+	return(0);
+}
+
-- 
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