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/*
* 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 */
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