malloc: put common memory functions to seperate file

These functions are needed independently of the specific
malloc implementation, so move them out.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_AUTO_COMPLETE)	+= complete.o
 obj-$(CONFIG_POLLER)		+= poller.o
 obj-$(CONFIG_BLOCK)		+= block.o
 
+obj-y += memory.o
 obj-y += dlmalloc.o
 obj-y += clock.o
 obj-y += version.o

common/dlmalloc.c

@@ -882,56 +882,6 @@ static mbinptr av_[NAV * 2 + 2] = {
 
 /* ----------------------------------------------------------------------- */
 
-/*
- * Begin and End of memory area for malloc(), and current "brk"
- */
-static ulong malloc_start;
-static ulong malloc_end;
-static ulong malloc_brk;
-
-ulong mem_malloc_start(void)
-{
-	return malloc_start;
-}
-
-ulong mem_malloc_end(void)
-{
-	return malloc_end;
-}
-
-void mem_malloc_init(void *start, void *end)
-{
-	malloc_start = (ulong)start;
-	malloc_end = (ulong)end;
-	malloc_brk = malloc_start;
-}
-
-static void *sbrk_no_zero(ptrdiff_t increment)
-{
-	ulong old = malloc_brk;
-	ulong new = old + increment;
-
-	if ((new < malloc_start) || (new > malloc_end))
-		return NULL;
-
-	malloc_brk = new;
-
-	return (void *)old;
-}
-
-static void *sbrk(ptrdiff_t increment)
-{
-	void *old = sbrk_no_zero(increment);
-
-	/* Only clear increment, if valid address was returned */
-	if (old != NULL)
-		memset(old, 0, increment);
-
-	return old;
-}
-
-/* ----------------------------------------------------------------------- */
-
 /*  Other static bookkeeping data */
 
 /* variables holding tunable values */

common/memory.c

@@ -0,0 +1,71 @@
+/*
+ * memory.c
+ *
+ * Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <common.h>
+
+/*
+ * Begin and End of memory area for malloc(), and current "brk"
+ */
+static unsigned long malloc_start;
+static unsigned long malloc_end;
+static unsigned long malloc_brk;
+
+unsigned long mem_malloc_start(void)
+{
+	return malloc_start;
+}
+
+unsigned long mem_malloc_end(void)
+{
+	return malloc_end;
+}
+
+void mem_malloc_init(void *start, void *end)
+{
+	malloc_start = (unsigned long)start;
+	malloc_end = (unsigned long)end;
+	malloc_brk = malloc_start;
+}
+
+static void *sbrk_no_zero(ptrdiff_t increment)
+{
+	unsigned long old = malloc_brk;
+	unsigned long new = old + increment;
+
+	if ((new < malloc_start) || (new > malloc_end))
+		return NULL;
+
+	malloc_brk = new;
+
+	return (void *)old;
+}
+
+void *sbrk(ptrdiff_t increment)
+{
+	void *old = sbrk_no_zero(increment);
+
+	/* Only clear increment, if valid address was returned */
+	if (old != NULL)
+		memset(old, 0, increment);
+
+	return old;
+}

include/malloc.h

@@ -18,6 +18,7 @@ size_t malloc_usable_size(void*);
 void malloc_stats(void);
 int mallopt(int, int);
 struct mallinfo mallinfo(void);
+void *sbrk(ptrdiff_t increment);
 
 #endif