diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-ppc/byteorder.h |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-ppc/byteorder.h')
-rw-r--r-- | include/asm-ppc/byteorder.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/include/asm-ppc/byteorder.h b/include/asm-ppc/byteorder.h new file mode 100644 index 00000000000..c63c81ec796 --- /dev/null +++ b/include/asm-ppc/byteorder.h @@ -0,0 +1,76 @@ +#ifndef _PPC_BYTEORDER_H +#define _PPC_BYTEORDER_H + +#include <asm/types.h> +#include <linux/compiler.h> + +#ifdef __GNUC__ +#ifdef __KERNEL__ + +extern __inline__ unsigned ld_le16(const volatile unsigned short *addr) +{ + unsigned val; + + __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); + return val; +} + +extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val) +{ + __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); +} + +extern __inline__ unsigned ld_le32(const volatile unsigned *addr) +{ + unsigned val; + + __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); + return val; +} + +extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val) +{ + __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); +} + +static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 value) +{ + __u16 result; + + __asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (value >> 8), "r" (value)); + return result; +} + +static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 value) +{ + __u32 result; + + __asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (value>>24), "r" (value)); + __asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (value)); + __asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (value)); + + return result; +} +#define __arch__swab32(x) ___arch__swab32(x) +#define __arch__swab16(x) ___arch__swab16(x) + +/* The same, but returns converted value from the location pointer by addr. */ +#define __arch__swab16p(addr) ld_le16(addr) +#define __arch__swab32p(addr) ld_le32(addr) + +/* The same, but do the conversion in situ, ie. put the value back to addr. */ +#define __arch__swab16s(addr) st_le16(addr,*addr) +#define __arch__swab32s(addr) st_le32(addr,*addr) + +#endif /* __KERNEL__ */ + +#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) +# define __BYTEORDER_HAS_U64__ +# define __SWAB_64_THRU_32__ +#endif + +#endif /* __GNUC__ */ + +#include <linux/byteorder/big_endian.h> + +#endif /* _PPC_BYTEORDER_H */ |