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
  12 static inline __wsum
  13 csum_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 */