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TOMOYO Linux Cross Reference
Linux/arch/microblaze/include/asm/checksum.h

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  1 /*
  2  * Copyright (C) 2008 Michal Simek <monstr@monstr.eu>
  3  * Copyright (C) 2006 Atmark Techno, Inc.
  4  *
  5  * This file is subject to the terms and conditions of the GNU General Public
  6  * License. See the file "COPYING" in the main directory of this archive
  7  * for more details.
  8  */
  9 
 10 #ifndef _ASM_MICROBLAZE_CHECKSUM_H
 11 #define _ASM_MICROBLAZE_CHECKSUM_H
 12 
 13 /*
 14  * computes the checksum of the TCP/UDP pseudo-header
 15  * returns a 16-bit checksum, already complemented
 16  */
 17 #define csum_tcpudp_nofold      csum_tcpudp_nofold
 18 static inline __wsum
 19 csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
 20                    unsigned short proto, __wsum sum)
 21 {
 22         __asm__("add %0, %0, %1\n\t"
 23                 "addc %0, %0, %2\n\t"
 24                 "addc %0, %0, %3\n\t"
 25                 "addc %0, %0, r0\n\t"
 26                 : "+&d" (sum)
 27                 : "d" (saddr), "d" (daddr),
 28 #ifdef __MICROBLAZEEL__
 29         "d" ((len + proto) << 8)
 30 #else
 31         "d" (len + proto)
 32 #endif
 33 );
 34         return sum;
 35 }
 36 
 37 #include <asm-generic/checksum.h>
 38 
 39 #endif /* _ASM_MICROBLAZE_CHECKSUM_H */
 40 

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