release/src-rt-6.x/linux/linux-2.6/include/asm-avr32/unaligned.h

   1 #ifndef __ASM_AVR32_UNALIGNED_H
   2 #define __ASM_AVR32_UNALIGNED_H
   3
   4 /*
   5  * AVR32 can handle some unaligned accesses, depending on the
   6  * implementation.  The AVR32 AP implementation can handle unaligned
   7  * words, but halfwords must be halfword-aligned, and doublewords must
   8  * be word-aligned.
   9  *
  10  * TODO: Make all this CPU-specific and optimize.
  11  */
  12
  13 #include <linux/string.h>
  14
  15 /* Use memmove here, so gcc does not insert a __builtin_memcpy. */
  16
  17 #define get_unaligned(ptr) \
  18   ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
  19
  20 #define put_unaligned(val, ptr)                         \
  21   ({ __typeof__(*(ptr)) __tmp = (val);                  \
  22      memmove((ptr), &__tmp, sizeof(*(ptr)));            \
  23      (void)0; })
  24
  25 #endif /* __ASM_AVR32_UNALIGNED_H */