svn_rev_167

ppc startup cleaunup

1 files changed, 32 insertions, 0 deletions

diff --git a/common/misc.c b/common/misc.c
new file mode 100644
index 0000000000..b3c47ef62d
--- /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);
+}