1 /*
2 * Licensed under the GPL
3 */
4
5 #ifndef __UM_SYSDEP_CHECKSUM_H
6 #define __UM_SYSDEP_CHECKSUM_H
7
8 static inline __sum16 ip_compute_csum(const void *buff, int len)
9 {
10 return csum_fold (csum_partial(buff, len, 0));
11 }
12
13 #define _HAVE_ARCH_IPV6_CSUM
14 static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
15 const struct in6_addr *daddr,
16 __u32 len, __u8 proto,
17 __wsum sum)
18 {
19 __asm__(
20 "addl 0(%1), %0 ;\n"
21 "adcl 4(%1), %0 ;\n"
22 "adcl 8(%1), %0 ;\n"
23 "adcl 12(%1), %0 ;\n"
24 "adcl 0(%2), %0 ;\n"
25 "adcl 4(%2), %0 ;\n"
26 "adcl 8(%2), %0 ;\n"
27 "adcl 12(%2), %0 ;\n"
28 "adcl %3, %0 ;\n"
29 "adcl %4, %0 ;\n"
30 "adcl $0, %0 ;\n"
31 : "=&r" (sum)
32 : "r" (saddr), "r" (daddr),
33 "r"(htonl(len)), "r"(htonl(proto)), ""(sum));
34
35 return csum_fold(sum);
36 }
37
38 #endif
39
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