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| author | Steven Whitehouse <swhiteho@redhat.com> | 2006-09-28 14:29:59 +0200 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-09-28 14:29:59 +0200 |
| commit | 185a257f2f73bcd89050ad02da5bedbc28fc43fa (patch) | |
| tree | 5e32586114534ed3f2165614cba3d578f5d87307 /include/asm-avr32/unaligned.h | |
| parent | [GFS2] Fix typo in last patch (diff) | |
| parent | Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/... (diff) | |
| download | linux-185a257f2f73bcd89050ad02da5bedbc28fc43fa.tar.xz linux-185a257f2f73bcd89050ad02da5bedbc28fc43fa.zip | |
Merge branch 'master' into gfs2
Diffstat (limited to 'include/asm-avr32/unaligned.h')
| -rw-r--r-- | include/asm-avr32/unaligned.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/asm-avr32/unaligned.h b/include/asm-avr32/unaligned.h new file mode 100644 index 000000000000..3042723fcbfd --- /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 */ |