1#ifndef _BFIN_CHECKSUM_H
2#define _BFIN_CHECKSUM_H
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18unsigned int csum_partial(const unsigned char *buff, int len, unsigned int sum);
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28unsigned int csum_partial_copy(const unsigned char *src, unsigned char *dst,
29 int len, int sum);
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38extern unsigned int csum_partial_copy_from_user(const unsigned char *src,
39 unsigned char *dst, int len,
40 int sum, int *csum_err);
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42#define csum_partial_copy_nocheck(src, dst, len, sum) \
43 csum_partial_copy((src), (dst), (len), (sum))
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45unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl);
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51static inline unsigned int csum_fold(unsigned int sum)
52{
53 while (sum >> 16)
54 sum = (sum & 0xffff) + (sum >> 16);
55 return ((~(sum << 16)) >> 16);
56}
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63static inline unsigned int
64csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len,
65 unsigned short proto, unsigned int sum)
66{
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68 __asm__ ("%0 = %0 + %1;\n\t"
69 "CC = AC0;\n\t"
70 "if !CC jump 4;\n\t"
71 "%0 = %0 + %4;\n\t"
72 "%0 = %0 + %2;\n\t"
73 "CC = AC0;\n\t"
74 "if !CC jump 4;\n\t"
75 "%0 = %0 + %4;\n\t"
76 "%0 = %0 + %3;\n\t"
77 "CC = AC0;\n\t"
78 "if !CC jump 4;\n\t"
79 "%0 = %0 + %4;\n\t"
80 "NOP;\n\t"
81 : "=d" (sum)
82 : "d" (daddr), "d" (saddr), "d" ((ntohs(len)<<16)+proto*256), "d" (1), "0"(sum));
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84 return (sum);
85}
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87static inline unsigned short int
88csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len,
89 unsigned short proto, unsigned int sum)
90{
91 return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
92}
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99extern unsigned short ip_compute_csum(const unsigned char *buff, int len);
100
101#endif
102