diff options
Diffstat (limited to 'include/asm-m68k/checksum.h')
| -rw-r--r-- | include/asm-m68k/checksum.h | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/include/asm-m68k/checksum.h b/include/asm-m68k/checksum.h deleted file mode 100644 index 494f9aec37ea..000000000000 --- a/include/asm-m68k/checksum.h +++ /dev/null | |||
| @@ -1,148 +0,0 @@ | |||
| 1 | #ifndef _M68K_CHECKSUM_H | ||
| 2 | #define _M68K_CHECKSUM_H | ||
| 3 | |||
| 4 | #include <linux/in6.h> | ||
| 5 | |||
| 6 | /* | ||
| 7 | * computes the checksum of a memory block at buff, length len, | ||
| 8 | * and adds in "sum" (32-bit) | ||
| 9 | * | ||
| 10 | * returns a 32-bit number suitable for feeding into itself | ||
| 11 | * or csum_tcpudp_magic | ||
| 12 | * | ||
| 13 | * this function must be called with even lengths, except | ||
| 14 | * for the last fragment, which may be odd | ||
| 15 | * | ||
| 16 | * it's best to have buff aligned on a 32-bit boundary | ||
| 17 | */ | ||
| 18 | __wsum csum_partial(const void *buff, int len, __wsum sum); | ||
| 19 | |||
| 20 | /* | ||
| 21 | * the same as csum_partial, but copies from src while it | ||
| 22 | * checksums | ||
| 23 | * | ||
| 24 | * here even more important to align src and dst on a 32-bit (or even | ||
| 25 | * better 64-bit) boundary | ||
| 26 | */ | ||
| 27 | |||
| 28 | extern __wsum csum_partial_copy_from_user(const void __user *src, | ||
| 29 | void *dst, | ||
| 30 | int len, __wsum sum, | ||
| 31 | int *csum_err); | ||
| 32 | |||
| 33 | extern __wsum csum_partial_copy_nocheck(const void *src, | ||
| 34 | void *dst, int len, | ||
| 35 | __wsum sum); | ||
| 36 | |||
| 37 | /* | ||
| 38 | * This is a version of ip_compute_csum() optimized for IP headers, | ||
| 39 | * which always checksum on 4 octet boundaries. | ||
| 40 | * | ||
| 41 | */ | ||
| 42 | static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) | ||
| 43 | { | ||
| 44 | unsigned int sum = 0; | ||
| 45 | unsigned long tmp; | ||
| 46 | |||
| 47 | __asm__ ("subqw #1,%2\n" | ||
| 48 | "1:\t" | ||
| 49 | "movel %1@+,%3\n\t" | ||
| 50 | "addxl %3,%0\n\t" | ||
| 51 | "dbra %2,1b\n\t" | ||
| 52 | "movel %0,%3\n\t" | ||
| 53 | "swap %3\n\t" | ||
| 54 | "addxw %3,%0\n\t" | ||
| 55 | "clrw %3\n\t" | ||
| 56 | "addxw %3,%0\n\t" | ||
| 57 | : "=d" (sum), "=&a" (iph), "=&d" (ihl), "=&d" (tmp) | ||
| 58 | : "0" (sum), "1" (iph), "2" (ihl) | ||
| 59 | : "memory"); | ||
| 60 | return (__force __sum16)~sum; | ||
| 61 | } | ||
| 62 | |||
| 63 | /* | ||
| 64 | * Fold a partial checksum | ||
| 65 | */ | ||
| 66 | |||
| 67 | static inline __sum16 csum_fold(__wsum sum) | ||
| 68 | { | ||
| 69 | unsigned int tmp = (__force u32)sum; | ||
| 70 | __asm__("swap %1\n\t" | ||
| 71 | "addw %1, %0\n\t" | ||
| 72 | "clrw %1\n\t" | ||
| 73 | "addxw %1, %0" | ||
| 74 | : "=&d" (sum), "=&d" (tmp) | ||
| 75 | : "0" (sum), "1" (tmp)); | ||
| 76 | return (__force __sum16)~sum; | ||
| 77 | } | ||
| 78 | |||
| 79 | |||
| 80 | static inline __wsum | ||
| 81 | csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, | ||
| 82 | unsigned short proto, __wsum sum) | ||
| 83 | { | ||
| 84 | __asm__ ("addl %2,%0\n\t" | ||
| 85 | "addxl %3,%0\n\t" | ||
| 86 | "addxl %4,%0\n\t" | ||
| 87 | "clrl %1\n\t" | ||
| 88 | "addxl %1,%0" | ||
| 89 | : "=&d" (sum), "=d" (saddr) | ||
| 90 | : "g" (daddr), "1" (saddr), "d" (len + proto), | ||
| 91 | "0" (sum)); | ||
| 92 | return sum; | ||
| 93 | } | ||
| 94 | |||
| 95 | |||
| 96 | /* | ||
| 97 | * computes the checksum of the TCP/UDP pseudo-header | ||
| 98 | * returns a 16-bit checksum, already complemented | ||
| 99 | */ | ||
| 100 | static inline __sum16 | ||
| 101 | csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len, | ||
| 102 | unsigned short proto, __wsum sum) | ||
| 103 | { | ||
| 104 | return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); | ||
| 105 | } | ||
| 106 | |||
| 107 | /* | ||
| 108 | * this routine is used for miscellaneous IP-like checksums, mainly | ||
| 109 | * in icmp.c | ||
| 110 | */ | ||
| 111 | |||
| 112 | static inline __sum16 ip_compute_csum(const void *buff, int len) | ||
| 113 | { | ||
| 114 | return csum_fold (csum_partial(buff, len, 0)); | ||
| 115 | } | ||
| 116 | |||
| 117 | #define _HAVE_ARCH_IPV6_CSUM | ||
| 118 | static __inline__ __sum16 | ||
| 119 | csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr, | ||
| 120 | __u32 len, unsigned short proto, __wsum sum) | ||
| 121 | { | ||
| 122 | register unsigned long tmp; | ||
| 123 | __asm__("addl %2@,%0\n\t" | ||
| 124 | "movel %2@(4),%1\n\t" | ||
| 125 | "addxl %1,%0\n\t" | ||
| 126 | "movel %2@(8),%1\n\t" | ||
| 127 | "addxl %1,%0\n\t" | ||
| 128 | "movel %2@(12),%1\n\t" | ||
| 129 | "addxl %1,%0\n\t" | ||
| 130 | "movel %3@,%1\n\t" | ||
| 131 | "addxl %1,%0\n\t" | ||
| 132 | "movel %3@(4),%1\n\t" | ||
| 133 | "addxl %1,%0\n\t" | ||
| 134 | "movel %3@(8),%1\n\t" | ||
| 135 | "addxl %1,%0\n\t" | ||
| 136 | "movel %3@(12),%1\n\t" | ||
| 137 | "addxl %1,%0\n\t" | ||
| 138 | "addxl %4,%0\n\t" | ||
| 139 | "clrl %1\n\t" | ||
| 140 | "addxl %1,%0" | ||
| 141 | : "=&d" (sum), "=&d" (tmp) | ||
| 142 | : "a" (saddr), "a" (daddr), "d" (len + proto), | ||
| 143 | "0" (sum)); | ||
| 144 | |||
| 145 | return csum_fold(sum); | ||
| 146 | } | ||
| 147 | |||
| 148 | #endif /* _M68K_CHECKSUM_H */ | ||