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authorH. Nikolaus Schaller <hns@goldelico.com>2012-04-20 14:10:36 +0200
committerH. Nikolaus Schaller <hns@goldelico.com>2012-04-20 14:10:36 +0200
commit819e36b8ceadb1d67db1ffe91b99c5282bfc6159 (patch)
treecaa2bc25e54f0d41abb61920f29d3bf5eee3d864 /x-loader/include/linux/byteorder/generic.h
parenta9a9e3f6aed040a12daf64157615f5e9fed974bb (diff)
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diff --git a/x-loader/include/linux/byteorder/generic.h b/x-loader/include/linux/byteorder/generic.h
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-#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
-
-
-/*
- * 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..
- */
-#if defined(__KERNEL__) || (defined (__GLIBC__) && __GLIBC__ >= 2)
-extern __u32 ntohl(__u32);
-extern __u32 htonl(__u32);
-#else
-extern unsigned long int ntohl(unsigned long int);
-extern unsigned long int htonl(unsigned long int);
-#endif
-extern unsigned short int ntohs(unsigned short int);
-extern unsigned short int htons(unsigned short int);
-
-
-#if defined(__GNUC__) && (__GNUC__ >= 2)
-
-#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)
-
-#if defined(__KERNEL__) || (defined (__GLIBC__) && __GLIBC__ >= 2)
-#define htonl(x) ___htonl(x)
-#define ntohl(x) ___ntohl(x)
-#else
-#define htonl(x) ((unsigned long)___htonl(x))
-#define ntohl(x) ((unsigned long)___ntohl(x))
-#endif
-#define htons(x) ___htons(x)
-#define ntohs(x) ___ntohs(x)
-
-#endif /* OPTIMIZE */
-
-
-#endif /* _LINUX_BYTEORDER_GENERIC_H */