[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>
diff --git a/include/asm-xtensa/unaligned.h b/include/asm-xtensa/unaligned.h
new file mode 100644
index 0000000..2822089
--- /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 */