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8#ifndef _BFIN_CHECKSUM_H
9#define _BFIN_CHECKSUM_H
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23__wsum csum_partial(const void *buff, int len, __wsum sum);
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33__wsum csum_partial_copy(const void *src, void *dst,
34 int len, __wsum sum);
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43extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
44 int len, __wsum sum, int *csum_err);
45
46#define csum_partial_copy_nocheck(src, dst, len, sum) \
47 csum_partial_copy((src), (dst), (len), (sum))
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49__sum16 ip_fast_csum(unsigned char *iph, unsigned int ihl);
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55static inline __sum16 csum_fold(__wsum sum)
56{
57 while (sum >> 16)
58 sum = (sum & 0xffff) + (sum >> 16);
59 return ((~(sum << 16)) >> 16);
60}
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67static inline __wsum
68csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
69 unsigned short proto, __wsum sum)
70{
71 unsigned int carry;
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73 __asm__ ("%0 = %0 + %2;\n\t"
74 "CC = AC0;\n\t"
75 "%1 = CC;\n\t"
76 "%0 = %0 + %1;\n\t"
77 "%0 = %0 + %3;\n\t"
78 "CC = AC0;\n\t"
79 "%1 = CC;\n\t"
80 "%0 = %0 + %1;\n\t"
81 "%0 = %0 + %4;\n\t"
82 "CC = AC0;\n\t"
83 "%1 = CC;\n\t"
84 "%0 = %0 + %1;\n\t"
85 : "=d" (sum), "=&d" (carry)
86 : "d" (daddr), "d" (saddr), "d" ((len + proto) << 8), "0"(sum)
87 : "CC");
88
89 return (sum);
90}
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92static inline __sum16
93csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
94 unsigned short proto, __wsum sum)
95{
96 return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
97}
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104extern __sum16 ip_compute_csum(const void *buff, int len);
105
106#endif
107