LXR linux/arch/c6x/include/asm/checksum.h

   1/*
   2 *  Copyright (C) 2011 Texas Instruments Incorporated
   3 *  Author: Mark Salter <msalter@redhat.com>
   4 *
   5 *  This program is free software; you can redistribute it and/or modify
   6 *  it under the terms of the GNU General Public License version 2 as
   7 *  published by the Free Software Foundation.
   8 */
   9#ifndef _ASM_C6X_CHECKSUM_H
  10#define _ASM_C6X_CHECKSUM_H
  11
  12static inline __wsum
  13csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
  14                   unsigned short proto, __wsum sum)
  15{
  16        unsigned long long tmp;
  17
  18        asm ("add     .d1   %1,%5,%1\n"
  19             "|| addu .l1   %3,%4,%0\n"
  20             "addu    .l1   %2,%0,%0\n"
  21#ifndef CONFIG_CPU_BIG_ENDIAN
  22             "|| shl  .s1   %1,8,%1\n"
  23#endif
  24             "addu    .l1   %1,%0,%0\n"
  25             "add     .l1   %P0,%p0,%2\n"
  26             : "=&a"(tmp), "+a"(len), "+a"(sum)
  27             : "a" (saddr), "a" (daddr), "a" (proto));
  28        return sum;
  29}
  30#define csum_tcpudp_nofold csum_tcpudp_nofold
  31
  32#include <asm-generic/checksum.h>
  33
  34#endif /* _ASM_C6X_CHECKSUM_H */
  35