This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-avr32 / unaligned.h

diff --git a/include/asm-avr32/unaligned.h b/include/asm-avr32/unaligned.h
new file mode 100644 (file)
index 0000000..3042723
--- /dev/null
+++ b/include/asm-avr32/unaligned.h
@@ -0,0 +1,25 @@
+#ifndef __ASM_AVR32_UNALIGNED_H
+#define __ASM_AVR32_UNALIGNED_H
+
+/*
+ * AVR32 can handle some unaligned accesses, depending on the
+ * implementation.  The AVR32 AP implementation can handle unaligned
+ * words, but halfwords must be halfword-aligned, and doublewords must
+ * be word-aligned.
+ *
+ * TODO: Make all this CPU-specific and optimize.
+ */
+
+#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 /* __ASM_AVR32_UNALIGNED_H */