[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6

The attached patches provides part 6 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/include/asm-xtensa/unaligned.h b/include/asm-xtensa/unaligned.h
new file mode 100644
index 000000000000..28220890d0a6
--- /dev/null
+++ b/include/asm-xtensa/unaligned.h
@@ -0,0 +1,28 @@
+/*
+ * include/asm-xtensa/unaligned.h
+ *
+ * Xtensa doesn't handle unaligned accesses efficiently.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_UNALIGNED_H
+#define _XTENSA_UNALIGNED_H
+
+#include <linux/string.h>
+
+/* Use memmove here, so gcc does not insert a __builtin_memcpy. */
+
+#define get_unaligned(ptr) \
+  ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
+
+#define put_unaligned(val, ptr)                         \
+  ({ __typeof__(*(ptr)) __tmp = (val);                  \
+     memmove((ptr), &__tmp, sizeof(*(ptr)));            \
+     (void)0; })
+
+#endif  /* _XTENSA_UNALIGNED_H */