From 53d3195be1e45609f96b809bd5709eedee4c5829 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Thu, 5 Jul 2007 18:01:29 +0200
Subject: [PATCH] svn_rev_167

ppc startup cleaunup
---
 arch/arm/lib/arm.c   | 10 ++++++++++
 common/misc.c        | 32 ++++++++++++++++++++++++++++++++
 include/mem_malloc.h |  7 +++++++
 3 files changed, 49 insertions(+)
 create mode 100644 arch/arm/lib/arm.c
 create mode 100644 common/misc.c
 create mode 100644 include/mem_malloc.h

diff --git a/arch/arm/lib/arm.c b/arch/arm/lib/arm.c
new file mode 100644
index 000000000..937623ba0
--- /dev/null
+++ b/arch/arm/lib/arm.c
@@ -0,0 +1,10 @@
+#include <init.h>
+#include <mem_malloc.h>
+
+int arm_mem_alloc_init(void)
+{
+	mem_alloc_init(_armboot_start - CFG_MALLOC_LEN,
+			_armboot_start);
+}
+
+core_initcall(arm_mem_alloc_init);
diff --git a/common/misc.c b/common/misc.c
new file mode 100644
index 000000000..b3c47ef62
--- /dev/null
+++ b/common/misc.c
@@ -0,0 +1,32 @@
+
+#include <mem_malloc.h>
+
+/*
+ * Begin and End of memory area for malloc(), and current "brk"
+ */
+static ulong mem_malloc_start = 0;
+static ulong mem_malloc_end = 0;
+static ulong mem_malloc_brk = 0;
+
+void mem_malloc_init (ulong start, ulong end)
+{
+	mem_malloc_start = start;
+	mem_malloc_end = end;
+	mem_malloc_brk = mem_malloc_start;
+
+	memset ((void *) mem_malloc_start, 0,
+			mem_malloc_end - mem_malloc_start);
+}
+
+void *sbrk (ptrdiff_t increment)
+{
+	ulong old = mem_malloc_brk;
+	ulong new = old + increment;
+
+	if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
+		return (NULL);
+	}
+	mem_malloc_brk = new;
+
+	return ((void *) old);
+}
diff --git a/include/mem_malloc.h b/include/mem_malloc.h
new file mode 100644
index 000000000..847eefc18
--- /dev/null
+++ b/include/mem_malloc.h
@@ -0,0 +1,7 @@
+#ifndef __MEM_MALLOC_H
+#define __MEM_MALLOC_H
+
+void mem_malloc_init (ulong start, ulong end);
+void *sbrk (ptrdiff_t increment);
+
+#endif