On 08/12/2014 10:32 PM, Chen Gang wrote: > > Yeah, we need. > >> The solution you suggest assumes that an arch is either little or big endian. >> But we cannot ignore the hybriads that can do both. >> > > For the architectures which can do both, for me, they are: sh, powerpc, > m32r, and mips (may mark CPU_LITTLE_ENDIAN), also are: arm/arm64, and > c6x (may mark !CPU_BIG_ENDIAN). > > For the architectures which only support little endian: x86, and ia64. > > The left, I assumes they are big endian (no any 'ENDIAN' can be found > in their Kconfig files). In my memory, except related with Intel, all > are (or support) big endian. > I'm quite certain that is wrong. From memory, for example, I believe CRIS is littleendian, and sure enough: : tazenda 103 ; less arch/cris/include/uapi/asm/byteorder.h #ifndef _CRIS_BYTEORDER_H #define _CRIS_BYTEORDER_H #include <linux/byteorder/little_endian.h> #endif As far as I know, endianism is always a compile-time option on Linux, so we should be able to relatively easily define the architecture so that we either have hardwired littleendian, bigendian, or prompt. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
