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/* * linux/arch/unicore32/include/asm/checksum.h * * Code specific to PKUnity SoC and UniCore ISA * * Copyright (C) 2001-2010 GUAN Xue-tao * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * IP checksum routines */ #ifndef __UNICORE_CHECKSUM_H__ #define __UNICORE_CHECKSUM_H__ /* * computes the checksum of the TCP/UDP pseudo-header * returns a 16-bit checksum, already complemented */ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { __asm__( "add.a %0, %1, %2\n" "addc.a %0, %0, %3\n" "addc.a %0, %0, %4 << #8\n" "addc.a %0, %0, %5\n" "addc %0, %0, #0\n" : "=&r"(sum) : "r" (sum), "r" (daddr), "r" (saddr), "r" (len), "Ir" (htons(proto)) : "cc"); return sum; } #define csum_tcpudp_nofold csum_tcpudp_nofold #include <asm-generic/checksum.h> #endif