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
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