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38 lines
804 B
38 lines
804 B
/* |
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* Licensed under the GPL |
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*/ |
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#ifndef __UM_SYSDEP_CHECKSUM_H |
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#define __UM_SYSDEP_CHECKSUM_H |
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static inline __sum16 ip_compute_csum(const void *buff, int len) |
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{ |
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return csum_fold (csum_partial(buff, len, 0)); |
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} |
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#define _HAVE_ARCH_IPV6_CSUM |
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static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr, |
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const struct in6_addr *daddr, |
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__u32 len, __u8 proto, |
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__wsum sum) |
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{ |
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__asm__( |
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"addl 0(%1), %0 ;\n" |
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"adcl 4(%1), %0 ;\n" |
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"adcl 8(%1), %0 ;\n" |
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"adcl 12(%1), %0 ;\n" |
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"adcl 0(%2), %0 ;\n" |
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"adcl 4(%2), %0 ;\n" |
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"adcl 8(%2), %0 ;\n" |
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"adcl 12(%2), %0 ;\n" |
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"adcl %3, %0 ;\n" |
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"adcl %4, %0 ;\n" |
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"adcl $0, %0 ;\n" |
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: "=&r" (sum) |
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: "r" (saddr), "r" (daddr), |
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"r"(htonl(len)), "r"(htonl(proto)), "0"(sum)); |
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return csum_fold(sum); |
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} |
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#endif
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