diff options
Diffstat (limited to 'sys/ia64/ia64/in_cksum.c')
-rw-r--r-- | sys/ia64/ia64/in_cksum.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/sys/ia64/ia64/in_cksum.c b/sys/ia64/ia64/in_cksum.c deleted file mode 100644 index 6c9959f..0000000 --- a/sys/ia64/ia64/in_cksum.c +++ /dev/null @@ -1,241 +0,0 @@ -/* $FreeBSD$ */ -/* $NetBSD: in_cksum.c,v 1.7 1997/09/02 13:18:15 thorpej Exp $ */ - -/*- - * Copyright (c) 1988, 1992, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1996 - * Matt Thomas <matt@3am-software.com> - * - * 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. - * - * @(#)in_cksum.c 8.1 (Berkeley) 6/10/93 - */ - -#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ - -#include <sys/param.h> -#include <sys/mbuf.h> -#include <sys/systm.h> -#include <netinet/in_systm.h> -#include <netinet/in.h> -#include <netinet/ip.h> -#include <machine/in_cksum.h> - -/* - * Checksum routine for Internet Protocol family headers - * (Portable Alpha version). - * - * This routine is very heavily used in the network - * code and should be modified for each CPU to be as fast as possible. - */ - -#define ADDCARRY(x) (x > 65535 ? x -= 65535 : x) -#define REDUCE32 \ - { \ - q_util.q = sum; \ - sum = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \ - } -#define REDUCE16 \ - { \ - q_util.q = sum; \ - l_util.l = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \ - sum = l_util.s[0] + l_util.s[1]; \ - ADDCARRY(sum); \ - } - -static const u_int32_t in_masks[] = { - /*0 bytes*/ /*1 byte*/ /*2 bytes*/ /*3 bytes*/ - 0x00000000, 0x000000FF, 0x0000FFFF, 0x00FFFFFF, /* offset 0 */ - 0x00000000, 0x0000FF00, 0x00FFFF00, 0xFFFFFF00, /* offset 1 */ - 0x00000000, 0x00FF0000, 0xFFFF0000, 0xFFFF0000, /* offset 2 */ - 0x00000000, 0xFF000000, 0xFF000000, 0xFF000000, /* offset 3 */ -}; - -union l_util { - u_int16_t s[2]; - u_int32_t l; -}; -union q_util { - u_int16_t s[4]; - u_int32_t l[2]; - u_int64_t q; -}; - -static u_int64_t -in_cksumdata(const void *buf, int len) -{ - const u_int32_t *lw = (const u_int32_t *) buf; - u_int64_t sum = 0; - u_int64_t prefilled; - int offset; - union q_util q_util; - - if ((3 & (long) lw) == 0 && len == 20) { - sum = (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3] + lw[4]; - REDUCE32; - return sum; - } - - if ((offset = 3 & (long) lw) != 0) { - const u_int32_t *masks = in_masks + (offset << 2); - lw = (u_int32_t *) (((long) lw) - offset); - sum = *lw++ & masks[len >= 3 ? 3 : len]; - len -= 4 - offset; - if (len <= 0) { - REDUCE32; - return sum; - } - } -#if 0 - /* - * Force to cache line boundary. - */ - offset = 32 - (0x1f & (long) lw); - if (offset < 32 && len > offset) { - len -= offset; - if (4 & offset) { - sum += (u_int64_t) lw[0]; - lw += 1; - } - if (8 & offset) { - sum += (u_int64_t) lw[0] + lw[1]; - lw += 2; - } - if (16 & offset) { - sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3]; - lw += 4; - } - } -#endif - /* - * access prefilling to start load of next cache line. - * then add current cache line - * save result of prefilling for loop iteration. - */ - prefilled = lw[0]; - while ((len -= 32) >= 4) { - u_int64_t prefilling = lw[8]; - sum += prefilled + lw[1] + lw[2] + lw[3] - + lw[4] + lw[5] + lw[6] + lw[7]; - lw += 8; - prefilled = prefilling; - } - if (len >= 0) { - sum += prefilled + lw[1] + lw[2] + lw[3] - + lw[4] + lw[5] + lw[6] + lw[7]; - lw += 8; - } else { - len += 32; - } - while ((len -= 16) >= 0) { - sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3]; - lw += 4; - } - len += 16; - while ((len -= 4) >= 0) { - sum += (u_int64_t) *lw++; - } - len += 4; - if (len > 0) - sum += (u_int64_t) (in_masks[len] & *lw); - REDUCE32; - return sum; -} - -u_short -in_addword(u_short a, u_short b) -{ - u_int64_t sum = a + b; - - ADDCARRY(sum); - return (sum); -} - -u_short -in_pseudo(u_int32_t a, u_int32_t b, u_int32_t c) -{ - u_int64_t sum; - union q_util q_util; - union l_util l_util; - - sum = (u_int64_t) a + b + c; - REDUCE16; - return (sum); -} - -u_short -in_cksum_skip(struct mbuf *m, int len, int skip) -{ - u_int64_t sum = 0; - int mlen = 0; - int clen = 0; - caddr_t addr; - union q_util q_util; - union l_util l_util; - - len -= skip; - for (; skip && m; m = m->m_next) { - if (m->m_len > skip) { - mlen = m->m_len - skip; - addr = mtod(m, caddr_t) + skip; - goto skip_start; - } else { - skip -= m->m_len; - } - } - - for (; m && len; m = m->m_next) { - if (m->m_len == 0) - continue; - mlen = m->m_len; - addr = mtod(m, caddr_t); -skip_start: - if (len < mlen) - mlen = len; - if ((clen ^ (long) addr) & 1) - sum += in_cksumdata(addr, mlen) << 8; - else - sum += in_cksumdata(addr, mlen); - - clen += mlen; - len -= mlen; - } - REDUCE16; - return (~sum & 0xffff); -} - -u_int in_cksum_hdr(const struct ip *ip) -{ - u_int64_t sum = in_cksumdata(ip, sizeof(struct ip)); - union q_util q_util; - union l_util l_util; - REDUCE16; - return (~sum & 0xffff); -} |