diff options
Diffstat (limited to 'include/linux/byteorder')
| -rw-r--r-- | include/linux/byteorder/big_endian.h | 106 | ||||
| -rw-r--r-- | include/linux/byteorder/generic.h | 172 | ||||
| -rw-r--r-- | include/linux/byteorder/little_endian.h | 106 | ||||
| -rw-r--r-- | include/linux/byteorder/pdp_endian.h | 88 | ||||
| -rw-r--r-- | include/linux/byteorder/swab.h | 192 | ||||
| -rw-r--r-- | include/linux/byteorder/swabb.h | 137 |
6 files changed, 801 insertions, 0 deletions
diff --git a/include/linux/byteorder/big_endian.h b/include/linux/byteorder/big_endian.h new file mode 100644 index 000000000000..bef87891cb24 --- /dev/null +++ b/include/linux/byteorder/big_endian.h @@ -0,0 +1,106 @@ +#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/types.h> +#include <linux/byteorder/swab.h> + +#define __constant_htonl(x) ((__force __be32)(__u32)(x)) +#define __constant_ntohl(x) ((__force __u32)(__be32)(x)) +#define __constant_htons(x) ((__force __be16)(__u16)(x)) +#define __constant_ntohs(x) ((__force __u16)(__be16)(x)) +#define __constant_cpu_to_le64(x) ((__force __le64)___constant_swab64((x))) +#define __constant_le64_to_cpu(x) ___constant_swab64((__force __u64)(__le64)(x)) +#define __constant_cpu_to_le32(x) ((__force __le32)___constant_swab32((x))) +#define __constant_le32_to_cpu(x) ___constant_swab32((__force __u32)(__le32)(x)) +#define __constant_cpu_to_le16(x) ((__force __le16)___constant_swab16((x))) +#define __constant_le16_to_cpu(x) ___constant_swab16((__force __u16)(__le16)(x)) +#define __constant_cpu_to_be64(x) ((__force __be64)(__u64)(x)) +#define __constant_be64_to_cpu(x) ((__force __u64)(__be64)(x)) +#define __constant_cpu_to_be32(x) ((__force __be32)(__u32)(x)) +#define __constant_be32_to_cpu(x) ((__force __u32)(__be32)(x)) +#define __constant_cpu_to_be16(x) ((__force __be16)(__u16)(x)) +#define __constant_be16_to_cpu(x) ((__force __u16)(__be16)(x)) +#define __cpu_to_le64(x) ((__force __le64)__swab64((x))) +#define __le64_to_cpu(x) __swab64((__force __u64)(__le64)(x)) +#define __cpu_to_le32(x) ((__force __le32)__swab32((x))) +#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) +#define __cpu_to_le16(x) ((__force __le16)__swab16((x))) +#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) +#define __cpu_to_be64(x) ((__force __be64)(__u64)(x)) +#define __be64_to_cpu(x) ((__force __u64)(__be64)(x)) +#define __cpu_to_be32(x) ((__force __be32)(__u32)(x)) +#define __be32_to_cpu(x) ((__force __u32)(__be32)(x)) +#define __cpu_to_be16(x) ((__force __be16)(__u16)(x)) +#define __be16_to_cpu(x) ((__force __u16)(__be16)(x)) + +static inline __le64 __cpu_to_le64p(const __u64 *p) +{ + return (__force __le64)__swab64p(p); +} +static inline __u64 __le64_to_cpup(const __le64 *p) +{ + return __swab64p((__u64 *)p); +} +static inline __le32 __cpu_to_le32p(const __u32 *p) +{ + return (__force __le32)__swab32p(p); +} +static inline __u32 __le32_to_cpup(const __le32 *p) +{ + return __swab32p((__u32 *)p); +} +static inline __le16 __cpu_to_le16p(const __u16 *p) +{ + return (__force __le16)__swab16p(p); +} +static inline __u16 __le16_to_cpup(const __le16 *p) +{ + return __swab16p((__u16 *)p); +} +static inline __be64 __cpu_to_be64p(const __u64 *p) +{ + return (__force __be64)*p; +} +static inline __u64 __be64_to_cpup(const __be64 *p) +{ + return (__force __u64)*p; +} +static inline __be32 __cpu_to_be32p(const __u32 *p) +{ + return (__force __be32)*p; +} +static inline __u32 __be32_to_cpup(const __be32 *p) +{ + return (__force __u32)*p; +} +static inline __be16 __cpu_to_be16p(const __u16 *p) +{ + return (__force __be16)*p; +} +static inline __u16 __be16_to_cpup(const __be16 *p) +{ + return (__force __u16)*p; +} +#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/generic.h b/include/linux/byteorder/generic.h new file mode 100644 index 000000000000..5fde6f4d6c1e --- /dev/null +++ b/include/linux/byteorder/generic.h @@ -0,0 +1,172 @@ +#ifndef _LINUX_BYTEORDER_GENERIC_H +#define _LINUX_BYTEORDER_GENERIC_H + +/* + * linux/byteorder_generic.h + * Generic Byte-reordering support + * + * Francois-Rene Rideau <fare@tunes.org> 19970707 + * gathered all the good ideas from all asm-foo/byteorder.h into one file, + * cleaned them up. + * I hope it is compliant with non-GCC compilers. + * I decided to put __BYTEORDER_HAS_U64__ in byteorder.h, + * because I wasn't sure it would be ok to put it in types.h + * Upgraded it to 2.1.43 + * Francois-Rene Rideau <fare@tunes.org> 19971012 + * Upgraded it to 2.1.57 + * to please Linus T., replaced huge #ifdef's between little/big endian + * by nestedly #include'd files. + * Francois-Rene Rideau <fare@tunes.org> 19971205 + * Made it to 2.1.71; now a facelift: + * Put files under include/linux/byteorder/ + * Split swab from generic support. + * + * TODO: + * = Regular kernel maintainers could also replace all these manual + * byteswap macros that remain, disseminated among drivers, + * after some grep or the sources... + * = Linus might want to rename all these macros and files to fit his taste, + * to fit his personal naming scheme. + * = it seems that a few drivers would also appreciate + * nybble swapping support... + * = every architecture could add their byteswap macro in asm/byteorder.h + * see how some architectures already do (i386, alpha, ppc, etc) + * = cpu_to_beXX and beXX_to_cpu might some day need to be well + * distinguished throughout the kernel. This is not the case currently, + * since little endian, big endian, and pdp endian machines needn't it. + * But this might be the case for, say, a port of Linux to 20/21 bit + * architectures (and F21 Linux addict around?). + */ + +/* + * The following macros are to be defined by <asm/byteorder.h>: + * + * Conversion of long and short int between network and host format + * ntohl(__u32 x) + * ntohs(__u16 x) + * htonl(__u32 x) + * htons(__u16 x) + * It seems that some programs (which? where? or perhaps a standard? POSIX?) + * might like the above to be functions, not macros (why?). + * if that's true, then detect them, and take measures. + * Anyway, the measure is: define only ___ntohl as a macro instead, + * and in a separate file, have + * unsigned long inline ntohl(x){return ___ntohl(x);} + * + * The same for constant arguments + * __constant_ntohl(__u32 x) + * __constant_ntohs(__u16 x) + * __constant_htonl(__u32 x) + * __constant_htons(__u16 x) + * + * Conversion of XX-bit integers (16- 32- or 64-) + * between native CPU format and little/big endian format + * 64-bit stuff only defined for proper architectures + * cpu_to_[bl]eXX(__uXX x) + * [bl]eXX_to_cpu(__uXX x) + * + * The same, but takes a pointer to the value to convert + * cpu_to_[bl]eXXp(__uXX x) + * [bl]eXX_to_cpup(__uXX x) + * + * The same, but change in situ + * cpu_to_[bl]eXXs(__uXX x) + * [bl]eXX_to_cpus(__uXX x) + * + * See asm-foo/byteorder.h for examples of how to provide + * architecture-optimized versions + * + */ + + +#if defined(__KERNEL__) +/* + * inside the kernel, we can use nicknames; + * outside of it, we must avoid POSIX namespace pollution... + */ +#define cpu_to_le64 __cpu_to_le64 +#define le64_to_cpu __le64_to_cpu +#define cpu_to_le32 __cpu_to_le32 +#define le32_to_cpu __le32_to_cpu +#define cpu_to_le16 __cpu_to_le16 +#define le16_to_cpu __le16_to_cpu +#define cpu_to_be64 __cpu_to_be64 +#define be64_to_cpu __be64_to_cpu +#define cpu_to_be32 __cpu_to_be32 +#define be32_to_cpu __be32_to_cpu +#define cpu_to_be16 __cpu_to_be16 +#define be16_to_cpu __be16_to_cpu +#define cpu_to_le64p __cpu_to_le64p +#define le64_to_cpup __le64_to_cpup +#define cpu_to_le32p __cpu_to_le32p +#define le32_to_cpup __le32_to_cpup +#define cpu_to_le16p __cpu_to_le16p +#define le16_to_cpup __le16_to_cpup +#define cpu_to_be64p __cpu_to_be64p +#define be64_to_cpup __be64_to_cpup +#define cpu_to_be32p __cpu_to_be32p +#define be32_to_cpup __be32_to_cpup +#define cpu_to_be16p __cpu_to_be16p +#define be16_to_cpup __be16_to_cpup +#define cpu_to_le64s __cpu_to_le64s +#define le64_to_cpus __le64_to_cpus +#define cpu_to_le32s __cpu_to_le32s +#define le32_to_cpus __le32_to_cpus +#define cpu_to_le16s __cpu_to_le16s +#define le16_to_cpus __le16_to_cpus +#define cpu_to_be64s __cpu_to_be64s +#define be64_to_cpus __be64_to_cpus +#define cpu_to_be32s __cpu_to_be32s +#define be32_to_cpus __be32_to_cpus +#define cpu_to_be16s __cpu_to_be16s +#define be16_to_cpus __be16_to_cpus +#endif + + +#if defined(__KERNEL__) +/* + * Handle ntohl and suches. These have various compatibility + * issues - like we want to give the prototype even though we + * also have a macro for them in case some strange program + * wants to take the address of the thing or something.. + * + * Note that these used to return a "long" in libc5, even though + * long is often 64-bit these days.. Thus the casts. + * + * They have to be macros in order to do the constant folding + * correctly - if the argument passed into a inline function + * it is no longer constant according to gcc.. + */ + +#undef ntohl +#undef ntohs +#undef htonl +#undef htons + +/* + * Do the prototypes. Somebody might want to take the + * address or some such sick thing.. + */ +extern __u32 ntohl(__be32); +extern __be32 htonl(__u32); +extern __u16 ntohs(__be16); +extern __be16 htons(__u16); + +#if defined(__GNUC__) && (__GNUC__ >= 2) && defined(__OPTIMIZE__) + +#define ___htonl(x) __cpu_to_be32(x) +#define ___htons(x) __cpu_to_be16(x) +#define ___ntohl(x) __be32_to_cpu(x) +#define ___ntohs(x) __be16_to_cpu(x) + +#define htonl(x) ___htonl(x) +#define ntohl(x) ___ntohl(x) +#define htons(x) ___htons(x) +#define ntohs(x) ___ntohs(x) + +#endif /* OPTIMIZE */ + +#endif /* KERNEL */ + + +#endif /* _LINUX_BYTEORDER_GENERIC_H */ diff --git a/include/linux/byteorder/little_endian.h b/include/linux/byteorder/little_endian.h new file mode 100644 index 000000000000..86e62b750176 --- /dev/null +++ b/include/linux/byteorder/little_endian.h @@ -0,0 +1,106 @@ +#ifndef _LINUX_BYTEORDER_LITTLE_ENDIAN_H +#define _LINUX_BYTEORDER_LITTLE_ENDIAN_H + +#ifndef __LITTLE_ENDIAN +#define __LITTLE_ENDIAN 1234 +#endif +#ifndef __LITTLE_ENDIAN_BITFIELD +#define __LITTLE_ENDIAN_BITFIELD +#endif + +#include <linux/types.h> +#include <linux/byteorder/swab.h> + +#define __constant_htonl(x) ((__force __be32)___constant_swab32((x))) +#define __constant_ntohl(x) ___constant_swab32((__force __be32)(x)) +#define __constant_htons(x) ((__force __be16)___constant_swab16((x))) +#define __constant_ntohs(x) ___constant_swab16((__force __be16)(x)) +#define __constant_cpu_to_le64(x) ((__force __le64)(__u64)(x)) +#define __constant_le64_to_cpu(x) ((__force __u64)(__le64)(x)) +#define __constant_cpu_to_le32(x) ((__force __le32)(__u32)(x)) +#define __constant_le32_to_cpu(x) ((__force __u32)(__le32)(x)) +#define __constant_cpu_to_le16(x) ((__force __le16)(__u16)(x)) +#define __constant_le16_to_cpu(x) ((__force __u16)(__le16)(x)) +#define __constant_cpu_to_be64(x) ((__force __be64)___constant_swab64((x))) +#define __constant_be64_to_cpu(x) ___constant_swab64((__force __u64)(__be64)(x)) +#define __constant_cpu_to_be32(x) ((__force __be32)___constant_swab32((x))) +#define __constant_be32_to_cpu(x) ___constant_swab32((__force __u32)(__be32)(x)) +#define __constant_cpu_to_be16(x) ((__force __be16)___constant_swab16((x))) +#define __constant_be16_to_cpu(x) ___constant_swab16((__force __u16)(__be16)(x)) +#define __cpu_to_le64(x) ((__force __le64)(__u64)(x)) +#define __le64_to_cpu(x) ((__force __u64)(__le64)(x)) +#define __cpu_to_le32(x) ((__force __le32)(__u32)(x)) +#define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) +#define __cpu_to_le16(x) ((__force __le16)(__u16)(x)) +#define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) +#define __cpu_to_be64(x) ((__force __be64)__swab64((x))) +#define __be64_to_cpu(x) __swab64((__force __u64)(__be64)(x)) +#define __cpu_to_be32(x) ((__force __be32)__swab32((x))) +#define __be32_to_cpu(x) __swab32((__force __u32)(__be32)(x)) +#define __cpu_to_be16(x) ((__force __be16)__swab16((x))) +#define __be16_to_cpu(x) __swab16((__force __u16)(__be16)(x)) + +static inline __le64 __cpu_to_le64p(const __u64 *p) +{ + return (__force __le64)*p; +} +static inline __u64 __le64_to_cpup(const __le64 *p) +{ + return (__force __u64)*p; +} +static inline __le32 __cpu_to_le32p(const __u32 *p) +{ + return (__force __le32)*p; +} +static inline __u32 __le32_to_cpup(const __le32 *p) +{ + return (__force __u32)*p; +} +static inline __le16 __cpu_to_le16p(const __u16 *p) +{ + return (__force __le16)*p; +} +static inline __u16 __le16_to_cpup(const __le16 *p) +{ + return (__force __u16)*p; +} +static inline __be64 __cpu_to_be64p(const __u64 *p) +{ + return (__force __be64)__swab64p(p); +} +static inline __u64 __be64_to_cpup(const __be64 *p) +{ + return __swab64p((__u64 *)p); +} +static inline __be32 __cpu_to_be32p(const __u32 *p) +{ + return (__force __be32)__swab32p(p); +} +static inline __u32 __be32_to_cpup(const __be32 *p) +{ + return __swab32p((__u32 *)p); +} +static inline __be16 __cpu_to_be16p(const __u16 *p) +{ + return (__force __be16)__swab16p(p); +} +static inline __u16 __be16_to_cpup(const __be16 *p) +{ + return __swab16p((__u16 *)p); +} +#define __cpu_to_le64s(x) do {} while (0) +#define __le64_to_cpus(x) do {} while (0) +#define __cpu_to_le32s(x) do {} while (0) +#define __le32_to_cpus(x) do {} while (0) +#define __cpu_to_le16s(x) do {} while (0) +#define __le16_to_cpus(x) do {} while (0) +#define __cpu_to_be64s(x) __swab64s((x)) +#define __be64_to_cpus(x) __swab64s((x)) +#define __cpu_to_be32s(x) __swab32s((x)) +#define __be32_to_cpus(x) __swab32s((x)) +#define __cpu_to_be16s(x) __swab16s((x)) +#define __be16_to_cpus(x) __swab16s((x)) + +#include <linux/byteorder/generic.h> + +#endif /* _LINUX_BYTEORDER_LITTLE_ENDIAN_H */ diff --git a/include/linux/byteorder/pdp_endian.h b/include/linux/byteorder/pdp_endian.h new file mode 100644 index 000000000000..618631cbc6e3 --- /dev/null +++ b/include/linux/byteorder/pdp_endian.h @@ -0,0 +1,88 @@ +#ifndef _LINUX_BYTEORDER_PDP_ENDIAN_H +#define _LINUX_BYTEORDER_PDP_ENDIAN_H + +/* + * Could have been named NUXI-endian, but we use the same name as in glibc. + * hopefully only the PDP and its evolutions (old VAXen in compatibility mode) + * should ever use this braindead byteorder. + * This file *should* work, but has not been tested. + * + * little-endian is 1234; big-endian is 4321; nuxi/pdp-endian is 3412 + * + * I thought vaxen were NUXI-endian, but was told they were correct-endian + * (little-endian), though indeed there existed NUXI-endian machines + * (DEC PDP-11 and old VAXen in compatibility mode). + * This makes this file a bit useless, but as a proof-of-concept. + * + * But what does a __u64 look like: is it 34127856 or 78563412 ??? + * I don't dare imagine! Hence, no 64-bit byteorder support yet. + * Hopefully, there 64-bit pdp-endian support shouldn't ever be required. + * + */ + +#ifndef __PDP_ENDIAN +#define __PDP_ENDIAN 3412 +#endif +#ifndef __PDP_ENDIAN_BITFIELD +#define __PDP_ENDIAN_BITFIELD +#endif + +#include <linux/byteorder/swab.h> +#include <linux/byteorder/swabb.h> + +#define __constant_htonl(x) ___constant_swahb32((x)) +#define __constant_ntohl(x) ___constant_swahb32((x)) +#define __constant_htons(x) ___constant_swab16((x)) +#define __constant_ntohs(x) ___constant_swab16((x)) +#define __constant_cpu_to_le64(x) I DON'T KNOW +#define __constant_le64_to_cpu(x) I DON'T KNOW +#define __constant_cpu_to_le32(x) ___constant_swahw32((x)) +#define __constant_le32_to_cpu(x) ___constant_swahw32((x)) +#define __constant_cpu_to_le16(x) ((__u16)(x) +#define __constant_le16_to_cpu(x) ((__u16)(x) +#define __constant_cpu_to_be64(x) I DON'T KNOW +#define __constant_be64_to_cpu(x) I DON'T KNOW +#define __constant_cpu_to_be32(x) ___constant_swahb32((x)) +#define __constant_be32_to_cpu(x) ___constant_swahb32((x)) +#define __constant_cpu_to_be16(x) ___constant_swab16((x)) +#define __constant_be16_to_cpu(x) ___constant_swab16((x)) +#define __cpu_to_le64(x) I DON'T KNOW +#define __le64_to_cpu(x) I DON'T KNOW +#define __cpu_to_le32(x) ___swahw32((x)) +#define __le32_to_cpu(x) ___swahw32((x)) +#define __cpu_to_le16(x) ((__u16)(x) +#define __le16_to_cpu(x) ((__u16)(x) +#define __cpu_to_be64(x) I DON'T KNOW +#define __be64_to_cpu(x) I DON'T KNOW +#define __cpu_to_be32(x) __swahb32((x)) +#define __be32_to_cpu(x) __swahb32((x)) +#define __cpu_to_be16(x) __swab16((x)) +#define __be16_to_cpu(x) __swab16((x)) +#define __cpu_to_le64p(x) I DON'T KNOW +#define __le64_to_cpup(x) I DON'T KNOW +#define __cpu_to_le32p(x) ___swahw32p((x)) +#define __le32_to_cpup(x) ___swahw32p((x)) +#define __cpu_to_le16p(x) (*(__u16*)(x)) +#define __le16_to_cpup(x) (*(__u16*)(x)) +#define __cpu_to_be64p(x) I DON'T KNOW +#define __be64_to_cpup(x) I DON'T KNOW +#define __cpu_to_be32p(x) __swahb32p((x)) +#define __be32_to_cpup(x) __swahb32p((x)) +#define __cpu_to_be16p(x) __swab16p((x)) +#define __be16_to_cpup(x) __swab16p((x)) +#define __cpu_to_le64s(x) I DON'T KNOW +#define __le64_to_cpus(x) I DON'T KNOW +#define __cpu_to_le32s(x) ___swahw32s((x)) +#define __le32_to_cpus(x) ___swahw32s((x)) +#define __cpu_to_le16s(x) do {} while (0) +#define __le16_to_cpus(x) do {} while (0) +#define __cpu_to_be64s(x) I DON'T KNOW +#define __be64_to_cpus(x) I DON'T KNOW +#define __cpu_to_be32s(x) __swahb32s((x)) +#define __be32_to_cpus(x) __swahb32s((x)) +#define __cpu_to_be16s(x) __swab16s((x)) +#define __be16_to_cpus(x) __swab16s((x)) + +#include <linux/byteorder/generic.h> + +#endif /* _LINUX_BYTEORDER_PDP_ENDIAN_H */ diff --git a/include/linux/byteorder/swab.h b/include/linux/byteorder/swab.h new file mode 100644 index 000000000000..2f1cb775125a --- /dev/null +++ b/include/linux/byteorder/swab.h @@ -0,0 +1,192 @@ +#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 + * + */ + +#include <linux/compiler.h> + +/* 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 __x = (x); \ + ((__u16)( \ + (((__u16)(__x) & (__u16)0x00ffU) << 8) | \ + (((__u16)(__x) & (__u16)0xff00U) >> 8) )); \ +}) + +#define ___swab32(x) \ +({ \ + __u32 __x = (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 __x = (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) )); \ +}) + +#define ___constant_swab16(x) \ + ((__u16)( \ + (((__u16)(x) & (__u16)0x00ffU) << 8) | \ + (((__u16)(x) & (__u16)0xff00U) >> 8) )) +#define ___constant_swab32(x) \ + ((__u32)( \ + (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \ + (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ + (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ + (((__u32)(x) & (__u32)0xff000000UL) >> 24) )) +#define ___constant_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) ({ __u16 __tmp = (x) ; ___swab16(__tmp); }) +#endif +#ifndef __arch__swab32 +# define __arch__swab32(x) ({ __u32 __tmp = (x) ; ___swab32(__tmp); }) +#endif +#ifndef __arch__swab64 +# define __arch__swab64(x) ({ __u64 __tmp = (x) ; ___swab64(__tmp); }) +#endif + +#ifndef __arch__swab16p +# define __arch__swab16p(x) __arch__swab16(*(x)) +#endif +#ifndef __arch__swab32p +# define __arch__swab32p(x) __arch__swab32(*(x)) +#endif +#ifndef __arch__swab64p +# define __arch__swab64p(x) __arch__swab64(*(x)) +#endif + +#ifndef __arch__swab16s +# define __arch__swab16s(x) do { *(x) = __arch__swab16p((x)); } while (0) +#endif +#ifndef __arch__swab32s +# define __arch__swab32s(x) do { *(x) = __arch__swab32p((x)); } while (0) +#endif +#ifndef __arch__swab64s +# define __arch__swab64s(x) do { *(x) = __arch__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 */ + + +static __inline__ __attribute_const__ __u16 __fswab16(__u16 x) +{ + return __arch__swab16(x); +} +static __inline__ __u16 __swab16p(const __u16 *x) +{ + return __arch__swab16p(x); +} +static __inline__ void __swab16s(__u16 *addr) +{ + __arch__swab16s(addr); +} + +static __inline__ __attribute_const__ __u32 __fswab32(__u32 x) +{ + return __arch__swab32(x); +} +static __inline__ __u32 __swab32p(const __u32 *x) +{ + return __arch__swab32p(x); +} +static __inline__ void __swab32s(__u32 *addr) +{ + __arch__swab32s(addr); +} + +#ifdef __BYTEORDER_HAS_U64__ +static __inline__ __attribute_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 +} +static __inline__ __u64 __swab64p(const __u64 *x) +{ + return __arch__swab64p(x); +} +static __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 */ diff --git a/include/linux/byteorder/swabb.h b/include/linux/byteorder/swabb.h new file mode 100644 index 000000000000..d28d9a804d3b --- /dev/null +++ b/include/linux/byteorder/swabb.h @@ -0,0 +1,137 @@ +#ifndef _LINUX_BYTEORDER_SWABB_H +#define _LINUX_BYTEORDER_SWABB_H + +/* + * linux/byteorder/swabb.h + * SWAp Bytes Bizarrely + * swaHHXX[ps]?(foo) + * + * Support for obNUXIous pdp-endian and other bizarre architectures. + * Will Linux ever run on such ancient beasts? if not, this file + * will be but a programming pearl. Still, it's a reminder that we + * shouldn't be making too many assumptions when trying to be portable. + * + */ + +/* + * Meaning of the names I chose (vaxlinux people feel free to correct them): + * swahw32 swap 16-bit half-words in a 32-bit word + * swahb32 swap 8-bit halves of each 16-bit half-word in a 32-bit word + * + * No 64-bit support yet. I don't know NUXI conventions for long longs. + * I guarantee it will be a mess when it's there, though :-> + * It will be even worse if there are conflicting 64-bit conventions. + * Hopefully, no one ever used 64-bit objects on NUXI machines. + * + */ + +#define ___swahw32(x) \ +({ \ + __u32 __x = (x); \ + ((__u32)( \ + (((__u32)(__x) & (__u32)0x0000ffffUL) << 16) | \ + (((__u32)(__x) & (__u32)0xffff0000UL) >> 16) )); \ +}) +#define ___swahb32(x) \ +({ \ + __u32 __x = (x); \ + ((__u32)( \ + (((__u32)(__x) & (__u32)0x00ff00ffUL) << 8) | \ + (((__u32)(__x) & (__u32)0xff00ff00UL) >> 8) )); \ +}) + +#define ___constant_swahw32(x) \ + ((__u32)( \ + (((__u32)(x) & (__u32)0x0000ffffUL) << 16) | \ + (((__u32)(x) & (__u32)0xffff0000UL) >> 16) )) +#define ___constant_swahb32(x) \ + ((__u32)( \ + (((__u32)(x) & (__u32)0x00ff00ffUL) << 8) | \ + (((__u32)(x) & (__u32)0xff00ff00UL) >> 8) )) + +/* + * provide defaults when no architecture-specific optimization is detected + */ +#ifndef __arch__swahw32 +# define __arch__swahw32(x) ___swahw32(x) +#endif +#ifndef __arch__swahb32 +# define __arch__swahb32(x) ___swahb32(x) +#endif + +#ifndef __arch__swahw32p +# define __arch__swahw32p(x) __swahw32(*(x)) +#endif +#ifndef __arch__swahb32p +# define __arch__swahb32p(x) __swahb32(*(x)) +#endif + +#ifndef __arch__swahw32s +# define __arch__swahw32s(x) do { *(x) = __swahw32p((x)); } while (0) +#endif +#ifndef __arch__swahb32s +# define __arch__swahb32s(x) do { *(x) = __swahb32p((x)); } while (0) +#endif + + +/* + * Allow constant folding + */ +#if defined(__GNUC__) && (__GNUC__ >= 2) && defined(__OPTIMIZE__) +# define __swahw32(x) \ +(__builtin_constant_p((__u32)(x)) ? \ + ___swahw32((x)) : \ + __fswahw32((x))) +# define __swahb32(x) \ +(__builtin_constant_p((__u32)(x)) ? \ + ___swahb32((x)) : \ + __fswahb32((x))) +#else +# define __swahw32(x) __fswahw32(x) +# define __swahb32(x) __fswahb32(x) +#endif /* OPTIMIZE */ + + +static __inline__ __const__ __u32 __fswahw32(__u32 x) +{ + return __arch__swahw32(x); +} +static __inline__ __u32 __swahw32p(__u32 *x) +{ + return __arch__swahw32p(x); +} +static __inline__ void __swahw32s(__u32 *addr) +{ + __arch__swahw32s(addr); +} + + +static __inline__ __const__ __u32 __fswahb32(__u32 x) +{ + return __arch__swahb32(x); +} +static __inline__ __u32 __swahb32p(__u32 *x) +{ + return __arch__swahb32p(x); +} +static __inline__ void __swahb32s(__u32 *addr) +{ + __arch__swahb32s(addr); +} + +#ifdef __BYTEORDER_HAS_U64__ +/* + * Not supported yet + */ +#endif /* __BYTEORDER_HAS_U64__ */ + +#if defined(__KERNEL__) +#define swahw32 __swahw32 +#define swahb32 __swahb32 +#define swahw32p __swahw32p +#define swahb32p __swahb32p +#define swahw32s __swahw32s +#define swahb32s __swahb32s +#endif + +#endif /* _LINUX_BYTEORDER_SWABB_H */ |