mn10300: introduce asm/swab.h

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/include/asm-mn10300/swab.h b/include/asm-mn10300/swab.h
new file mode 100644
index 000000000000..4504d1b4b477
--- /dev/null
+++ b/include/asm-mn10300/swab.h
@@ -0,0 +1,42 @@
+/* MN10300 Byte-order primitive construction
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_SWAB_H
+#define _ASM_SWAB_H
+
+#include <asm/types.h>
+
+#ifdef __GNUC__
+
+static inline __attribute__((const))
+__u32 __arch_swab32(__u32 x)
+{
+	__u32 ret;
+	asm("swap %1,%0" : "=r" (ret) : "r" (x));
+	return ret;
+}
+#define __arch_swab32 __arch_swab32
+
+static inline __attribute__((const))
+__u16 __arch_swab16(__u16 x)
+{
+	__u16 ret;
+	asm("swaph %1,%0" : "=r" (ret) : "r" (x));
+	return ret;
+}
+#define __arch_swab32 __arch_swab32
+
+#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+#  define __SWAB_64_THRU_32__
+#endif
+
+#endif /* __GNUC__ */
+
+#endif /* _ASM_SWAB_H */