1 files changed, 78 insertions, 0 deletions
diff --git a/include/asm-sh/checksum_64.h b/include/asm-sh/checksum_64.h
new file mode 100644
index 00000000000..9c62a031a8f
--- /dev/null
+++ b/include/asm-sh/checksum_64.h
@@ -0,0 +1,78 @@
+#ifndef __ASM_SH_CHECKSUM_64_H
+#define __ASM_SH_CHECKSUM_64_H
+
+/*
+ * include/asm-sh/checksum_64.h
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+/*
+ * 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
+ */
+asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum);
+
+/*
+ *	Note: when you get a NULL pointer exception here this means someone
+ *	passed in an incorrect kernel address to one of these functions.
+ *
+ *	If you use these functions directly please don't forget the
+ *	access_ok().
+ */
+
+
+__wsum csum_partial_copy_nocheck(const void *src, void *dst, int len,
+				       __wsum sum);
+
+__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
+					 int len, __wsum sum, int *err_ptr);
+
+static inline __sum16 csum_fold(__wsum csum)
+{
+	u32 sum = (__force u32)csum;
+        sum = (sum & 0xffff) + (sum >> 16);
+        sum = (sum & 0xffff) + (sum >> 16);
+        return (__force __sum16)~sum;
+}
+
+__sum16 ip_fast_csum(const void *iph, unsigned int ihl);
+
+__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
+				 unsigned short len, unsigned short proto,
+				 __wsum sum);
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
+						   unsigned short len,
+						   unsigned short proto,
+						   __wsum sum)
+{
+	return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
+}
+
+/*
+ * 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));
+}
+
+#endif /* __ASM_SH_CHECKSUM_64_H */