endian.h revision 1.10 
1/*	$NetBSD: endian.h,v 1.10 1997/10/17 04:44:01 jonathan Exp $	*/
2
3/*
4 * Copyright (c) 1987, 1991, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *	@(#)endian.h	8.1 (Berkeley) 6/11/93
36 */
37
38#ifndef _MIPS_ENDIAN_H_
39#define	_MIPS_ENDIAN_H_
40
41/*
42 * Define _NOQUAD if the compiler does NOT support 64-bit integers.
43 */
44/* #define _NOQUAD */
45
46/*
47 * Define the order of 32-bit words in 64-bit words.
48 */
49#define _QUAD_HIGHWORD 1
50#define _QUAD_LOWWORD 0
51
52#ifndef _POSIX_SOURCE
53/*
54 * Definitions for byte order, according to byte significance from low
55 * address to high.
56 */
57#define	LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
58#define	BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
59#define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */
60
61#ifndef BYTE_ORDER
62# error  Define MIPS target CPU endian-ness in port-specific header file
63#endif
64
65
66#ifndef _LOCORE
67/* C-family endian-ness definitions */
68
69#include <sys/cdefs.h>
70#include <mips/types.h>
71
72typedef u_int32_t	in_addr_t;
73typedef u_int16_t	in_port_t;
74
75__BEGIN_DECLS
76in_addr_t	htonl __P((in_addr_t));
77in_port_t	htons __P((in_port_t));
78in_addr_t	ntohl __P((in_addr_t));
79in_port_t	ntohs __P((in_port_t));
80u_int16_t	bswap16 __P((u_int16_t));
81u_int32_t	bswap32 __P((u_int32_t));
82u_int64_t	bswap64 __P((u_int64_t));
83__END_DECLS
84
85/*
86 * Macros for network/external number representation conversion.
87 */
88#if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
89#define	ntohl(x)	(x)
90#define	ntohs(x)	(x)
91#define	htonl(x)	(x)
92#define	htons(x)	(x)
93
94#define	NTOHL(x)	(x)
95#define	NTOHS(x)	(x)
96#define	HTONL(x)	(x)
97#define	HTONS(x)	(x)
98
99#else	/* LITTLE_ENDIAN || !defined(lint) */
100
101#define	NTOHL(x)	(x) = ntohl((in_addr_t)x)
102#define	NTOHS(x)	(x) = ntohs((in_port_t)x)
103#define	HTONL(x)	(x) = htonl((in_addr_t)x)
104#define	HTONS(x)	(x) = htons((in_port_t)x)
105#endif	/* LITTLE_ENDIAN || !defined(lint) */
106
107#else /* _LOCORE */
108
109/* Assembly-code endian-independent aliases for unaligned memory accesses */
110#if BYTE_ORDER == LITTLE_ENDIAN
111# define LWHI lwr
112# define LWLO lwl
113# define SWHI swr
114# define SWLO swl
115#endif /* BYTE_ORDER == LITTLE_ENDIAN */
116
117#if BYTE_ORDER == BIG_ENDIAN
118# define LWHI lwl
119# define LWLO lwr
120# define SWHI swl
121# define SWLO swr
122#endif /* BYTE_ORDER == BIG_ENDIAN */
123
124#endif /* _LOCORE */
125#endif /* ! _POSIX_SOURCE */
126#endif /* !_MIPS_ENDIAN_H_ */
127