1/*
2 * linux/arch/unicore32/include/asm/checksum.h
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * IP checksum routines
13 */
14#ifndef __UNICORE_CHECKSUM_H__
15#define __UNICORE_CHECKSUM_H__
16
17/*
18 * computes the checksum of the TCP/UDP pseudo-header
19 * returns a 16-bit checksum, already complemented
20 */
21
22static inline __wsum
23csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
24		   unsigned short proto, __wsum sum)
25{
26	__asm__(
27	"add.a	%0, %1, %2\n"
28	"addc.a	%0, %0, %3\n"
29	"addc.a	%0, %0, %4 << #8\n"
30	"addc.a	%0, %0, %5\n"
31	"addc	%0, %0, #0\n"
32	: "=&r"(sum)
33	: "r" (sum), "r" (daddr), "r" (saddr), "r" (len), "Ir" (htons(proto))
34	: "cc");
35	return sum;
36}
37#define csum_tcpudp_nofold	csum_tcpudp_nofold
38
39#include <asm-generic/checksum.h>
40
41#endif
42