/* * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. * TsiChung Liew (Tsi-Chung.Liew@freescale.com) * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #ifndef _M68K_BYTEORDER_H #define _M68K_BYTEORDER_H #include <asm/types.h> #ifdef __GNUC__ #define __sw16(x) \ ((__u16)( \ (((__u16)(x) & (__u16)0x00ffU) << 8) | \ (((__u16)(x) & (__u16)0xff00U) >> 8) )) #define __sw32(x) \ ((__u32)( \ (((__u32)(x)) << 24) | \ (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ (((__u32)(x)) >> 24) )) extern __inline__ unsigned ld_le16(const volatile unsigned short *addr) { unsigned result = *addr; return __sw16(result); } extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val) { *addr = __sw16(val); } extern __inline__ unsigned ld_le32(const volatile unsigned *addr) { unsigned result = *addr; return __sw32(result); } extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val) { *addr = __sw32(val); } #if 0 /* alas, egcs sounds like it has a bug in this code that doesn't use the inline asm correctly, and can cause file corruption. Until I hear that it's fixed, I can live without the extra speed. I hope. */ #if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90) #if 0 # define __arch_swab16(x) ld_le16(&x) # define __arch_swab32(x) ld_le32(&x) #else static __inline__ __attribute__ ((const)) __u16 ___arch__swab16(__u16 value) { return __sw16(value); } static __inline__ __attribute__ ((const)) __u32 ___arch__swab32(__u32 value) { return __sw32(value); } #define __arch__swab32(x) ___arch__swab32(x) #define __arch__swab16(x) ___arch__swab16(x) #endif /* 0 */ #endif /* The same, but returns converted value from the location pointer by addr. */ #define __arch__swab16p(addr) ld_le16(addr) #define __arch__swab32p(addr) ld_le32(addr) /* The same, but do the conversion in situ, ie. put the value back to addr. */ #define __arch__swab16s(addr) st_le16(addr,*addr) #define __arch__swab32s(addr) st_le32(addr,*addr) #endif #endif /* __GNUC__ */ #if defined(__GNUC__) && !defined(__STRICT_ANSI__) #define __BYTEORDER_HAS_U64__ #endif #include <linux/byteorder/big_endian.h> #endif /* _M68K_BYTEORDER_H */