diff options
author | Doug Rabson <dfr@FreeBSD.org> | 1998-06-10 10:57:29 +0000 |
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committer | Doug Rabson <dfr@FreeBSD.org> | 1998-06-10 10:57:29 +0000 |
commit | 897cd717a56fada7bcdb663c761885013df84a20 (patch) | |
tree | a452ee9b49edc4a7a01b5f26baa2798217a67923 /sys/alpha/include/in_cksum.h | |
parent | 8c12612cf6d4265be5c54e20f768e6fd697fd1b3 (diff) | |
download | src-897cd717a56fada7bcdb663c761885013df84a20.tar.gz src-897cd717a56fada7bcdb663c761885013df84a20.zip |
Add initial support for the FreeBSD/alpha kernel. This is very much a
work in progress and has never booted a real machine. Initial
development and testing was done using SimOS (see
http://simos.stanford.edu for details). On the SimOS simulator, this
port successfully reaches single-user mode and has been tested with
loads as high as one copy of /bin/ls :-).
Obtained from: partly from NetBSD/alpha
Notes
Notes:
svn path=/head/; revision=36849
Diffstat (limited to 'sys/alpha/include/in_cksum.h')
-rw-r--r-- | sys/alpha/include/in_cksum.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/sys/alpha/include/in_cksum.h b/sys/alpha/include/in_cksum.h new file mode 100644 index 000000000000..7e1c0f0dee49 --- /dev/null +++ b/sys/alpha/include/in_cksum.h @@ -0,0 +1,78 @@ +/*- + * Copyright (c) 1990 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. + * + * from tahoe: in_cksum.c 1.2 86/01/05 + * from: @(#)in_cksum.c 1.3 (Berkeley) 1/19/91 + * from: Id: in_cksum.c,v 1.8 1995/12/03 18:35:19 bde Exp + * $Id: in_cksum.h,v 1.5 1997/08/16 19:14:55 wollman Exp $ + */ + +#ifndef _MACHINE_IN_CKSUM_H_ +#define _MACHINE_IN_CKSUM_H_ 1 + +#include <sys/cdefs.h> + +/* + * It it useful to have an Internet checksum routine which is inlineable + * and optimized specifically for the task of computing IP header checksums + * in the normal case (where there are no options and the header length is + * therefore always exactly five 32-bit words. + */ +#ifdef __GNUC__ + +static __inline void +in_cksum_update(struct ip *ip) +{ + int __tmpsum; + __tmpsum = (int)ntohs(ip->ip_sum) + 256; + ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); +} + +#else + +#define in_cksum_update(ip) \ + do { \ + int __tmpsum; \ + __tmpsum = (int)ntohs(ip->ip_sum) + 256; \ + ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); \ + } while(0) + +#endif + +typedef unsigned in_psum_t; +#ifdef KERNEL +u_int in_cksum_hdr(const struct ip *ip); +in_psum_t in_cksum_partial(in_psum_t psum, const u_short *w, int len); +int in_cksum_finalize(in_psum_t psum); +#endif /* KERNEL */ + +#endif /* _MACHINE_IN_CKSUM_H_ */ |