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| author | Stefan Reinauer <reinauer@chromium.org> | 2011-10-21 14:24:57 -0700 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2011-10-24 20:29:29 +0200 |
| commit | a1e4824f73602a411826b27160a8818049ce0f97 (patch) | |
| tree | 777dcf31f4eddaaf0c68078814bd27fb63f03524 /util/cbfstool/swab.h | |
| parent | 3c976791b06c75e8983266b3551f133d89924376 (diff) | |
| download | coreboot-a1e4824f73602a411826b27160a8818049ce0f97.tar.xz | |
Various fixes to cbfstool.
- add ntohll and htonll (as coreboot parses 64bit fields now)
- use the same byte swapping code across platforms
- detect endianess early
- fix lots of warnings
- Don't override CFLAGS in Makefile
Change-Id: Iaea02ff7a31ab6a95fd47858d0efd9af764a3e5f
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/313
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'util/cbfstool/swab.h')
| -rw-r--r-- | util/cbfstool/swab.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/util/cbfstool/swab.h b/util/cbfstool/swab.h new file mode 100644 index 0000000000..c5e43709a6 --- /dev/null +++ b/util/cbfstool/swab.h @@ -0,0 +1,44 @@ +#ifndef _SWAB_H +#define _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) \ + ((unsigned short)( \ + (((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \ + (((unsigned short)(x) & (unsigned short)0xff00U) >> 8) )) + +#define swab32(x) \ + ((unsigned int)( \ + (((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \ + (((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \ + (((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \ + (((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) )) + +#define swab64(x) \ + ((uint64_t)( \ + (((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) | \ + (((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \ + (((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \ + (((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \ + (((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \ + (((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \ + (((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \ + (((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56) )) + +#endif /* _SWAB_H */ |