40 lines
961 B
C
40 lines
961 B
C
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/*
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* Copyright (C) 2008 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_CHECKSUM_H
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#define _ASM_MICROBLAZE_CHECKSUM_H
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/*
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* computes the checksum of the TCP/UDP pseudo-header
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* returns a 16-bit checksum, already complemented
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*/
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#define csum_tcpudp_nofold csum_tcpudp_nofold
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static inline __wsum
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csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
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unsigned short proto, __wsum sum)
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{
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__asm__("add %0, %0, %1\n\t"
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"addc %0, %0, %2\n\t"
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"addc %0, %0, %3\n\t"
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"addc %0, %0, r0\n\t"
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: "+&d" (sum)
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: "d" (saddr), "d" (daddr),
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#ifdef __MICROBLAZEEL__
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"d" ((len + proto) << 8)
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#else
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"d" (len + proto)
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#endif
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);
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return sum;
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}
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#include <asm-generic/checksum.h>
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#endif /* _ASM_MICROBLAZE_CHECKSUM_H */
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