1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2008 Michal Simek <monstr@monstr.eu>
4  * Copyright (C) 2006 Atmark Techno, Inc.
5  */
6 
7 #ifndef _ASM_MICROBLAZE_CHECKSUM_H
8 #define _ASM_MICROBLAZE_CHECKSUM_H
9 
10 /*
11  * computes the checksum of the TCP/UDP pseudo-header
12  * returns a 16-bit checksum, already complemented
13  */
14 #define csum_tcpudp_nofold	csum_tcpudp_nofold
15 static inline __wsum
16 csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len,
17 		   __u8 proto, __wsum sum)
18 {
19 	__asm__("add %0, %0, %1\n\t"
20 		"addc %0, %0, %2\n\t"
21 		"addc %0, %0, %3\n\t"
22 		"addc %0, %0, r0\n\t"
23 		: "+&d" (sum)
24 		: "d" (saddr), "d" (daddr),
25 #ifdef __MICROBLAZEEL__
26 	"d" ((len + proto) << 8)
27 #else
28 	"d" (len + proto)
29 #endif
30 );
31 	return sum;
32 }
33 
34 #include <asm-generic/checksum.h>
35 
36 #endif /* _ASM_MICROBLAZE_CHECKSUM_H */
37