NetBSD/sys/arch/mips/include/endian.h

145 lines
4.4 KiB
C

/* $NetBSD: endian.h,v 1.14 1998/07/31 15:07:41 mycroft Exp $ */
/*
* Copyright (c) 1987, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)endian.h 8.1 (Berkeley) 6/11/93
*/
#ifndef _MIPS_ENDIAN_H_
#define _MIPS_ENDIAN_H_
#ifndef _BYTE_ORDER
# error Define MIPS target CPU endian-ness in port-specific header file.
#endif
/*
* Definitions for byte order, according to byte significance from low
* address to high.
*/
#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
/*
* Define _NOQUAD if the compiler does NOT support 64-bit integers.
*/
/* #define _NOQUAD */
/*
* Define the order of 32-bit words in 64-bit words.
*/
#if _BYTE_ORDER == _LITTLE_ENDIAN
#define _QUAD_HIGHWORD 1
#define _QUAD_LOWWORD 0
#endif
#if _BYTE_ORDER == _BIG_ENDIAN
#define _QUAD_HIGHWORD 0
#define _QUAD_LOWWORD 1
#endif
#ifndef _POSIX_SOURCE
/*
* Traditional names for byteorder.
*/
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
#define BYTE_ORDER _BYTE_ORDER
#ifndef _LOCORE
/* C-family endian-ness definitions */
#include <sys/cdefs.h>
#include <mips/types.h>
typedef u_int32_t in_addr_t;
typedef u_int16_t in_port_t;
__BEGIN_DECLS
in_addr_t htonl __P((in_addr_t));
in_port_t htons __P((in_port_t));
in_addr_t ntohl __P((in_addr_t));
in_port_t ntohs __P((in_port_t));
u_int16_t bswap16 __P((u_int16_t));
u_int32_t bswap32 __P((u_int32_t));
u_int64_t bswap64 __P((u_int64_t));
__END_DECLS
/*
* Macros for network/external number representation conversion.
*/
#if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
#define ntohl(x) (x)
#define ntohs(x) (x)
#define htonl(x) (x)
#define htons(x) (x)
#define NTOHL(x) (void) (x)
#define NTOHS(x) (void) (x)
#define HTONL(x) (void) (x)
#define HTONS(x) (void) (x)
#else /* LITTLE_ENDIAN || !defined(lint) */
#define NTOHL(x) (x) = ntohl((in_addr_t)(x))
#define NTOHS(x) (x) = ntohs((in_port_t)(x))
#define HTONL(x) (x) = htonl((in_addr_t)(x))
#define HTONS(x) (x) = htons((in_port_t)(x))
#endif /* LITTLE_ENDIAN || !defined(lint) */
#else /* _LOCORE */
/*
* Endian-independent assembly-code aliases for unaligned memory accesses.
*/
#if BYTE_ORDER == LITTLE_ENDIAN
# define LWHI lwr
# define LWLO lwl
# define SWHI swr
# define SWLO swl
#endif /* BYTE_ORDER == LITTLE_ENDIAN */
#if BYTE_ORDER == BIG_ENDIAN
# define LWHI lwl
# define LWLO lwr
# define SWHI swl
# define SWLO swr
#endif /* BYTE_ORDER == BIG_ENDIAN */
#endif /* _LOCORE */
#endif /* ! _POSIX_SOURCE */
#endif /* !_MIPS_ENDIAN_H_ */