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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
|
|
