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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-08-07 09:55:03 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-08-07 09:55:03 +0100
commit4fb8af10d0fd09372d52966b76922b9e82bbc950 (patch)
treed240e4d40357583e3f3eb228dccf20122a5b31ed /include/asm-powerpc/checksum.h
parentf44f82e8a20b98558486eb14497b2f71c78fa325 (diff)
parent64a99d2a8c3ed5c4e39f3ae1cc682aa8fd3977fc (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes
Diffstat (limited to 'include/asm-powerpc/checksum.h')
-rw-r--r--include/asm-powerpc/checksum.h117
1 files changed, 0 insertions, 117 deletions
diff --git a/include/asm-powerpc/checksum.h b/include/asm-powerpc/checksum.h
deleted file mode 100644
index 7cdf358337c..00000000000
--- a/include/asm-powerpc/checksum.h
+++ /dev/null
@@ -1,117 +0,0 @@
-#ifndef _ASM_POWERPC_CHECKSUM_H
-#define _ASM_POWERPC_CHECKSUM_H
-#ifdef __KERNEL__
-
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-/*
- * This is a version of ip_compute_csum() optimized for IP headers,
- * which always checksum on 4 octet boundaries. ihl is the number
- * of 32-bit words and is always >= 5.
- */
-extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
-
-/*
- * computes the checksum of the TCP/UDP pseudo-header
- * returns a 16-bit checksum, already complemented
- */
-extern __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto,
- __wsum sum);
-
-/*
- * computes the checksum of a memory block at buff, length len,
- * and adds in "sum" (32-bit)
- *
- * returns a 32-bit number suitable for feeding into itself
- * or csum_tcpudp_magic
- *
- * this function must be called with even lengths, except
- * for the last fragment, which may be odd
- *
- * it's best to have buff aligned on a 32-bit boundary
- */
-extern __wsum csum_partial(const void *buff, int len, __wsum sum);
-
-/*
- * Computes the checksum of a memory block at src, length len,
- * and adds in "sum" (32-bit), while copying the block to dst.
- * If an access exception occurs on src or dst, it stores -EFAULT
- * to *src_err or *dst_err respectively (if that pointer is not
- * NULL), and, for an error on src, zeroes the rest of dst.
- *
- * Like csum_partial, this must be called with even lengths,
- * except for the last fragment.
- */
-extern __wsum csum_partial_copy_generic(const void *src, void *dst,
- int len, __wsum sum,
- int *src_err, int *dst_err);
-/*
- * the same as csum_partial, but copies from src to dst while it
- * checksums.
- */
-#define csum_partial_copy_from_user(src, dst, len, sum, errp) \
- csum_partial_copy_generic((__force const void *)(src), (dst), (len), (sum), (errp), NULL)
-
-#define csum_partial_copy_nocheck(src, dst, len, sum) \
- csum_partial_copy_generic((src), (dst), (len), (sum), NULL, NULL)
-
-
-/*
- * turns a 32-bit partial checksum (e.g. from csum_partial) into a
- * 1's complement 16-bit checksum.
- */
-static inline __sum16 csum_fold(__wsum sum)
-{
- unsigned int tmp;
-
- /* swap the two 16-bit halves of sum */
- __asm__("rlwinm %0,%1,16,0,31" : "=r" (tmp) : "r" (sum));
- /* if there is a carry from adding the two 16-bit halves,
- it will carry from the lower half into the upper half,
- giving us the correct sum in the upper half. */
- return (__force __sum16)(~((__force u32)sum + tmp) >> 16);
-}
-
-/*
- * this routine is used for miscellaneous IP-like checksums, mainly
- * in icmp.c
- */
-static inline __sum16 ip_compute_csum(const void *buff, int len)
-{
- return csum_fold(csum_partial(buff, len, 0));
-}
-
-static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto,
- __wsum sum)
-{
-#ifdef __powerpc64__
- unsigned long s = (__force u32)sum;
-
- s += (__force u32)saddr;
- s += (__force u32)daddr;
- s += proto + len;
- s += (s >> 32);
- return (__force __wsum) s;
-#else
- __asm__("\n\
- addc %0,%0,%1 \n\
- adde %0,%0,%2 \n\
- adde %0,%0,%3 \n\
- addze %0,%0 \n\
- "
- : "=r" (sum)
- : "r" (daddr), "r"(saddr), "r"(proto + len), "0"(sum));
- return sum;
-#endif
-}
-#endif /* __KERNEL__ */
-#endif