45 lines
916 B
C
45 lines
916 B
C
/*
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* Copyright 2004-2009 Analog Devices Inc.
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* akbar.hussain@lineo.com
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef _BFIN_CHECKSUM_H
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#define _BFIN_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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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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unsigned int carry;
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__asm__ ("%0 = %0 + %2;\n\t"
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"CC = AC0;\n\t"
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"%1 = CC;\n\t"
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"%0 = %0 + %1;\n\t"
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"%0 = %0 + %3;\n\t"
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"CC = AC0;\n\t"
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"%1 = CC;\n\t"
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"%0 = %0 + %1;\n\t"
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"%0 = %0 + %4;\n\t"
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"CC = AC0;\n\t"
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"%1 = CC;\n\t"
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"%0 = %0 + %1;\n\t"
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: "=d" (sum), "=&d" (carry)
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: "d" (daddr), "d" (saddr), "d" ((len + proto) << 8), "0"(sum)
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: "CC");
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return (sum);
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}
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#define csum_tcpudp_nofold __csum_tcpudp_nofold
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#include <asm-generic/checksum.h>
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#endif
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