diff options
Diffstat (limited to 'include/linux/byteorder')
| -rw-r--r-- | include/linux/byteorder/big_endian.h | 68 | ||||
| -rw-r--r-- | include/linux/byteorder/swab.h | 158 |
2 files changed, 226 insertions, 0 deletions
diff --git a/include/linux/byteorder/big_endian.h b/include/linux/byteorder/big_endian.h new file mode 100644 index 0000000..ebd81c0 --- /dev/null +++ b/include/linux/byteorder/big_endian.h @@ -0,0 +1,68 @@ +#ifndef _LINUX_BYTEORDER_BIG_ENDIAN_H +#define _LINUX_BYTEORDER_BIG_ENDIAN_H + +#ifndef __BIG_ENDIAN +#define __BIG_ENDIAN 4321 +#endif +#ifndef __BIG_ENDIAN_BITFIELD +#define __BIG_ENDIAN_BITFIELD +#endif + +#include <linux/byteorder/swab.h> + +#define __constant_htonl(x) ((__u32)(x)) +#define __constant_ntohl(x) ((__u32)(x)) +#define __constant_htons(x) ((__u16)(x)) +#define __constant_ntohs(x) ((__u16)(x)) +#define __constant_cpu_to_le64(x) ___swab64((x)) +#define __constant_le64_to_cpu(x) ___swab64((x)) +#define __constant_cpu_to_le32(x) ___swab32((x)) +#define __constant_le32_to_cpu(x) ___swab32((x)) +#define __constant_cpu_to_le16(x) ___swab16((x)) +#define __constant_le16_to_cpu(x) ___swab16((x)) +#define __constant_cpu_to_be64(x) ((__u64)(x)) +#define __constant_be64_to_cpu(x) ((__u64)(x)) +#define __constant_cpu_to_be32(x) ((__u32)(x)) +#define __constant_be32_to_cpu(x) ((__u32)(x)) +#define __constant_cpu_to_be16(x) ((__u16)(x)) +#define __constant_be16_to_cpu(x) ((__u16)(x)) +#define __cpu_to_le64(x) __swab64((x)) +#define __le64_to_cpu(x) __swab64((x)) +#define __cpu_to_le32(x) __swab32((x)) +#define __le32_to_cpu(x) __swab32((x)) +#define __cpu_to_le16(x) __swab16((x)) +#define __le16_to_cpu(x) __swab16((x)) +#define __cpu_to_be64(x) ((__u64)(x)) +#define __be64_to_cpu(x) ((__u64)(x)) +#define __cpu_to_be32(x) ((__u32)(x)) +#define __be32_to_cpu(x) ((__u32)(x)) +#define __cpu_to_be16(x) ((__u16)(x)) +#define __be16_to_cpu(x) ((__u16)(x)) +#define __cpu_to_le64p(x) __swab64p((x)) +#define __le64_to_cpup(x) __swab64p((x)) +#define __cpu_to_le32p(x) __swab32p((x)) +#define __le32_to_cpup(x) __swab32p((x)) +#define __cpu_to_le16p(x) __swab16p((x)) +#define __le16_to_cpup(x) __swab16p((x)) +#define __cpu_to_be64p(x) (*(__u64*)(x)) +#define __be64_to_cpup(x) (*(__u64*)(x)) +#define __cpu_to_be32p(x) (*(__u32*)(x)) +#define __be32_to_cpup(x) (*(__u32*)(x)) +#define __cpu_to_be16p(x) (*(__u16*)(x)) +#define __be16_to_cpup(x) (*(__u16*)(x)) +#define __cpu_to_le64s(x) __swab64s((x)) +#define __le64_to_cpus(x) __swab64s((x)) +#define __cpu_to_le32s(x) __swab32s((x)) +#define __le32_to_cpus(x) __swab32s((x)) +#define __cpu_to_le16s(x) __swab16s((x)) +#define __le16_to_cpus(x) __swab16s((x)) +#define __cpu_to_be64s(x) do {} while (0) +#define __be64_to_cpus(x) do {} while (0) +#define __cpu_to_be32s(x) do {} while (0) +#define __be32_to_cpus(x) do {} while (0) +#define __cpu_to_be16s(x) do {} while (0) +#define __be16_to_cpus(x) do {} while (0) + +#include <linux/byteorder/generic.h> + +#endif /* _LINUX_BYTEORDER_BIG_ENDIAN_H */ diff --git a/include/linux/byteorder/swab.h b/include/linux/byteorder/swab.h new file mode 100644 index 0000000..813df46 --- /dev/null +++ b/include/linux/byteorder/swab.h @@ -0,0 +1,158 @@ +#ifndef _LINUX_BYTEORDER_SWAB_H +#define _LINUX_BYTEORDER_SWAB_H + +/* + * linux/byteorder/swab.h + * Byte-swapping, independently from CPU endianness + * swabXX[ps]?(foo) + * + * Francois-Rene Rideau <fare@tunes.org> 19971205 + * separated swab functions from cpu_to_XX, + * to clean up support for bizarre-endian architectures. + * + * See asm-i386/byteorder.h and suches for examples of how to provide + * architecture-dependent optimized versions + * + */ + +/* casts are necessary for constants, because we never know how for sure + * how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way. + */ +#define ___swab16(x) \ + ((__u16)( \ + (((__u16)(x) & (__u16)0x00ffU) << 8) | \ + (((__u16)(x) & (__u16)0xff00U) >> 8) )) +#define ___swab32(x) \ + ((__u32)( \ + (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \ + (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ + (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ + (((__u32)(x) & (__u32)0xff000000UL) >> 24) )) +#define ___swab64(x) \ + ((__u64)( \ + (__u64)(((__u64)(x) & (__u64)0x00000000000000ffULL) << 56) | \ + (__u64)(((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) | \ + (__u64)(((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) | \ + (__u64)(((__u64)(x) & (__u64)0x00000000ff000000ULL) << 8) | \ + (__u64)(((__u64)(x) & (__u64)0x000000ff00000000ULL) >> 8) | \ + (__u64)(((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) | \ + (__u64)(((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) | \ + (__u64)(((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56) )) + +/* + * provide defaults when no architecture-specific optimization is detected + */ +#ifndef __arch__swab16 +# define __arch__swab16(x) ___swab16(x) +#endif +#ifndef __arch__swab32 +# define __arch__swab32(x) ___swab32(x) +#endif +#ifndef __arch__swab64 +# define __arch__swab64(x) ___swab64(x) +#endif + +#ifndef __arch__swab16p +# define __arch__swab16p(x) __swab16(*(x)) +#endif +#ifndef __arch__swab32p +# define __arch__swab32p(x) __swab32(*(x)) +#endif +#ifndef __arch__swab64p +# define __arch__swab64p(x) __swab64(*(x)) +#endif + +#ifndef __arch__swab16s +# define __arch__swab16s(x) do { *(x) = __swab16p((x)); } while (0) +#endif +#ifndef __arch__swab32s +# define __arch__swab32s(x) do { *(x) = __swab32p((x)); } while (0) +#endif +#ifndef __arch__swab64s +# define __arch__swab64s(x) do { *(x) = __swab64p((x)); } while (0) +#endif + + +/* + * Allow constant folding + */ +#if defined(__GNUC__) && (__GNUC__ >= 2) && defined(__OPTIMIZE__) +# define __swab16(x) \ +(__builtin_constant_p((__u16)(x)) ? \ + ___swab16((x)) : \ + __fswab16((x))) +# define __swab32(x) \ +(__builtin_constant_p((__u32)(x)) ? \ + ___swab32((x)) : \ + __fswab32((x))) +# define __swab64(x) \ +(__builtin_constant_p((__u64)(x)) ? \ + ___swab64((x)) : \ + __fswab64((x))) +#else +# define __swab16(x) __fswab16(x) +# define __swab32(x) __fswab32(x) +# define __swab64(x) __fswab64(x) +#endif /* OPTIMIZE */ + + +extern __inline__ __const__ __u16 __fswab16(__u16 x) +{ + return __arch__swab16(x); +} +extern __inline__ __u16 __swab16p(__u16 *x) +{ + return __arch__swab16p(x); +} +extern __inline__ void __swab16s(__u16 *addr) +{ + __arch__swab16s(addr); +} + +extern __inline__ __const__ __u32 __fswab32(__u32 x) +{ + return __arch__swab32(x); +} +extern __inline__ __u32 __swab32p(__u32 *x) +{ + return __arch__swab32p(x); +} +extern __inline__ void __swab32s(__u32 *addr) +{ + __arch__swab32s(addr); +} + +#ifdef __BYTEORDER_HAS_U64__ +extern __inline__ __const__ __u64 __fswab64(__u64 x) +{ +# ifdef __SWAB_64_THRU_32__ + __u32 h = x >> 32; + __u32 l = x & ((1ULL<<32)-1); + return (((__u64)__swab32(l)) << 32) | ((__u64)(__swab32(h))); +# else + return __arch__swab64(x); +# endif +} +extern __inline__ __u64 __swab64p(__u64 *x) +{ + return __arch__swab64p(x); +} +extern __inline__ void __swab64s(__u64 *addr) +{ + __arch__swab64s(addr); +} +#endif /* __BYTEORDER_HAS_U64__ */ + +#if defined(__KERNEL__) +#define swab16 __swab16 +#define swab32 __swab32 +#define swab64 __swab64 +#define swab16p __swab16p +#define swab32p __swab32p +#define swab64p __swab64p +#define swab16s __swab16s +#define swab32s __swab32s +#define swab64s __swab64s +#endif + +#endif /* _LINUX_BYTEORDER_SWAB_H */ |