/* * include/asm-microblaze/byteorder.h -- Endian id and conversion ops * * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au> * Copyright (C) 2001 NEC Corporation * Copyright (C) 2001 Miles Bader <miles@gnu.org> * * This file is subject to the terms and conditions of the GNU General * Public License. See the file COPYING in the main directory of this * archive for more details. * * Written by Miles Bader <miles@gnu.org> * Microblaze port by John Williams */ #ifndef __MICROBLAZE_BYTEORDER_H__ #define __MICROBLAZE_BYTEORDER_H__ #include <asm/types.h> #ifdef __GNUC__ /* This is effectively a dupe of the arch-independent byteswap code in include/linux/byteorder/swab.h, however we force a cast of the result up to 32 bits. This in turn forces the compiler to explicitly clear the high 16 bits, which it wasn't doing otherwise. I think this is a symptom of a bug in mb-gcc. JW 20040303 */ static __inline__ __const__ __u16 ___arch__swab16 (__u16 half_word) { /* 32 bit temp to cast result, forcing clearing of high word */ __u32 temp; temp = ((half_word & 0x00FFU) << 8) | ((half_word & 0xFF00U) >> 8); return (__u16) temp; } #define __arch__swab16(x) ___arch__swab16(x) /* Microblaze has no arch-specific endian conversion insns */ #if !defined(__STRICT_ANSI__) || defined(__KERNEL__) # define __BYTEORDER_HAS_U64__ # define __SWAB_64_THRU_32__ #endif #endif /* __GNUC__ */ #include <linux/byteorder/big_endian.h> #endif /* __MICROBLAZE_BYTEORDER_H__ */