diff options
Diffstat (limited to 'freebsd/sys/arm/include/machine/in_cksum.h')
| -rw-r--r-- | freebsd/sys/arm/include/machine/in_cksum.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/freebsd/sys/arm/include/machine/in_cksum.h b/freebsd/sys/arm/include/machine/in_cksum.h new file mode 100644 index 00000000..5e3e9333 --- /dev/null +++ b/freebsd/sys/arm/include/machine/in_cksum.h @@ -0,0 +1,66 @@ +/*- + * 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 + * $FreeBSD$ + */ + +#ifndef _MACHINE_IN_CKSUM_HH_ +#define _MACHINE_IN_CKSUM_HH_ 1 + +#include <freebsd/sys/cdefs.h> + +#ifdef _KERNEL +u_short in_cksum(struct mbuf *m, int len); +u_short in_addword(u_short sum, u_short b); +u_short in_cksum_skip(struct mbuf *m, int len, int skip); +u_int do_cksum(const void *, int); +u_int in_cksum_hdr(const struct ip *); + +static __inline u_short +in_pseudo(u_int sum, u_int b, u_int c) +{ + __asm __volatile("adds %0, %0, %1\n" + "adcs %0, %0, %2\n" + "adc %0, %0, #0\n" + : "+r" (sum) + : "r" (b), "r" (c)); + sum = (sum & 0xffff) + (sum >> 16); + if (sum > 0xffff) + sum -= 0xffff; + return (sum); +} + +#endif /* _KERNEL */ +#endif /* _MACHINE_IN_CKSUM_HH_ */ |