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Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelv...
[linux-2.6.git] / arch / blackfin / include / asm / checksum.h
1 /*
2  * Copyright 2004-2009 Analog Devices Inc.
3  *                     akbar.hussain@lineo.com
4  *
5  * Licensed under the GPL-2 or later.
6  */
7
8 #ifndef _BFIN_CHECKSUM_H
9 #define _BFIN_CHECKSUM_H
10
11 /*
12  * computes the checksum of the TCP/UDP pseudo-header
13  * returns a 16-bit checksum, already complemented
14  */
15
16 static inline __wsum
17 __csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
18                    unsigned short proto, __wsum sum)
19 {
20         unsigned int carry;
21
22         __asm__ ("%0 = %0 + %2;\n\t"
23                 "CC = AC0;\n\t"
24                 "%1 = CC;\n\t"
25                 "%0 = %0 + %1;\n\t"
26                 "%0 = %0 + %3;\n\t"
27                 "CC = AC0;\n\t"
28                 "%1 = CC;\n\t"
29                 "%0 = %0 + %1;\n\t"
30                 "%0 = %0 + %4;\n\t"
31                 "CC = AC0;\n\t"
32                 "%1 = CC;\n\t"
33                 "%0 = %0 + %1;\n\t"
34                 : "=d" (sum), "=&d" (carry)
35                 : "d" (daddr), "d" (saddr), "d" ((len + proto) << 8), "0"(sum)
36                 : "CC");
37
38         return (sum);
39 }
40 #define csum_tcpudp_nofold __csum_tcpudp_nofold
41
42 #include <asm-generic/checksum.h>
43
44 #endif