1/*
2 * Copyright (C) 2008 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2006 Atmark Techno, Inc.
4 *
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
8 */
9
10#ifndef _ASM_MICROBLAZE_CHECKSUM_H
11#define _ASM_MICROBLAZE_CHECKSUM_H
12
13/*
14 * computes the checksum of the TCP/UDP pseudo-header
15 * returns a 16-bit checksum, already complemented
16 */
17#define csum_tcpudp_nofold	csum_tcpudp_nofold
18static inline __wsum
19csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
20		   unsigned short proto, __wsum sum)
21{
22	__asm__("add %0, %0, %1\n\t"
23		"addc %0, %0, %2\n\t"
24		"addc %0, %0, %3\n\t"
25		"addc %0, %0, r0\n\t"
26		: "+&d" (sum)
27		: "d" (saddr), "d" (daddr),
28#ifdef __MICROBLAZEEL__
29	"d" ((len + proto) << 8)
30#else
31	"d" (len + proto)
32#endif
33);
34	return sum;
35}
36
37#include <asm-generic/checksum.h>
38
39#endif /* _ASM_MICROBLAZE_CHECKSUM_H */
40