combined pchw and embedded into tiny. added section on arm to README

R=rsc
CC=golang-dev
http://codereview.appspot.com/194151

Committer: Russ Cox <rsc@golang.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/src/pkg/runtime/tiny/mem.c b/src/pkg/runtime/tiny/mem.c
new file mode 100644
index 000000000..a66a4a731
--- /dev/null
+++ b/src/pkg/runtime/tiny/mem.c
@@ -0,0 +1,41 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "runtime.h"
+#include "malloc.h"
+
+// Assume there's an arbitrary amount of memory starting at "end".
+// Sizing PC memory is beyond the scope of this demo.
+
+void*
+SysAlloc(uintptr ask)
+{
+	static byte *p;
+	extern byte end[];
+	byte *q;
+	
+	if(p == nil) {
+		p = end;
+		p += 7 & -(uintptr)p;
+	}
+	ask += 7 & -ask;
+
+	q = p;
+	p += ask;
+	·memclr(q, ask);
+	return q;
+}
+
+void
+SysFree(void *v, uintptr n)
+{
+	USED(v, n);
+}
+
+void
+SysUnused(void *v, uintptr n)
+{
+	USED(v, n);
+}
+