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@@ -1,5 +1,170 @@
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-#ifdef __uClinux__
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-#include "checksum_no.h"
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+#ifndef _M68K_CHECKSUM_H
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+#define _M68K_CHECKSUM_H
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+
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+#include <linux/in6.h>
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+
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+/*
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+ * computes the checksum of a memory block at buff, length len,
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+ * and adds in "sum" (32-bit)
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+ *
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+ * returns a 32-bit number suitable for feeding into itself
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+ * or csum_tcpudp_magic
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+ *
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+ * this function must be called with even lengths, except
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+ * for the last fragment, which may be odd
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+ *
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+ * it's best to have buff aligned on a 32-bit boundary
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+ */
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+__wsum csum_partial(const void *buff, int len, __wsum sum);
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+
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+/*
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+ * the same as csum_partial, but copies from src while it
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+ * checksums
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+ *
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+ * here even more important to align src and dst on a 32-bit (or even
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+ * better 64-bit) boundary
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+ */
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+
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+extern __wsum csum_partial_copy_from_user(const void __user *src,
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+ void *dst,
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+ int len, __wsum sum,
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+ int *csum_err);
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+
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+extern __wsum csum_partial_copy_nocheck(const void *src,
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+ void *dst, int len,
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+ __wsum sum);
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+
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+
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+#ifdef CONFIG_COLDFIRE
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+
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+/*
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+ * The ColdFire cores don't support all the 68k instructions used
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+ * in the optimized checksum code below. So it reverts back to using
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+ * more standard C coded checksums. The fast checksum code is
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+ * significantly larger than the optimized version, so it is not
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+ * inlined here.
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+ */
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+__sum16 ip_fast_csum(const void *iph, unsigned int ihl);
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+
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+static inline __sum16 csum_fold(__wsum sum)
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+{
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+ unsigned int tmp = (__force u32)sum;
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+
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+ tmp = (tmp & 0xffff) + (tmp >> 16);
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+ tmp = (tmp & 0xffff) + (tmp >> 16);
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+
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+ return (__force __sum16)~tmp;
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+}
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+
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#else
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-#include "checksum_mm.h"
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-#endif
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+
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+/*
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+ * This is a version of ip_fast_csum() optimized for IP headers,
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+ * which always checksum on 4 octet boundaries.
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+ */
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+static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
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+{
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+ unsigned int sum = 0;
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+ unsigned long tmp;
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+
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+ __asm__ ("subqw #1,%2\n"
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+ "1:\t"
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+ "movel %1@+,%3\n\t"
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+ "addxl %3,%0\n\t"
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+ "dbra %2,1b\n\t"
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+ "movel %0,%3\n\t"
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+ "swap %3\n\t"
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+ "addxw %3,%0\n\t"
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+ "clrw %3\n\t"
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+ "addxw %3,%0\n\t"
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+ : "=d" (sum), "=&a" (iph), "=&d" (ihl), "=&d" (tmp)
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+ : "0" (sum), "1" (iph), "2" (ihl)
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+ : "memory");
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+ return (__force __sum16)~sum;
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+}
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+
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+static inline __sum16 csum_fold(__wsum sum)
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+{
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+ unsigned int tmp = (__force u32)sum;
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+
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+ __asm__("swap %1\n\t"
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+ "addw %1, %0\n\t"
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+ "clrw %1\n\t"
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+ "addxw %1, %0"
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+ : "=&d" (sum), "=&d" (tmp)
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+ : "0" (sum), "1" (tmp));
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+
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+ return (__force __sum16)~sum;
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+}
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+
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+#endif /* CONFIG_COLDFIRE */
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+
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+static inline __wsum
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+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
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+ unsigned short proto, __wsum sum)
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+{
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+ __asm__ ("addl %2,%0\n\t"
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+ "addxl %3,%0\n\t"
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+ "addxl %4,%0\n\t"
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+ "clrl %1\n\t"
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+ "addxl %1,%0"
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+ : "=&d" (sum), "=d" (saddr)
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+ : "g" (daddr), "1" (saddr), "d" (len + proto),
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+ "0" (sum));
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+ return sum;
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+}
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+
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+
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+/*
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+ * computes the checksum of the TCP/UDP pseudo-header
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+ * returns a 16-bit checksum, already complemented
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+ */
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+static inline __sum16
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+csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
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+ unsigned short proto, __wsum sum)
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+{
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+ return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
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+}
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+
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+/*
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+ * this routine is used for miscellaneous IP-like checksums, mainly
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+ * in icmp.c
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+ */
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+
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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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+
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+#define _HAVE_ARCH_IPV6_CSUM
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+static __inline__ __sum16
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+csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr,
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+ __u32 len, unsigned short proto, __wsum sum)
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+{
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+ register unsigned long tmp;
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+ __asm__("addl %2@,%0\n\t"
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+ "movel %2@(4),%1\n\t"
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+ "addxl %1,%0\n\t"
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+ "movel %2@(8),%1\n\t"
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+ "addxl %1,%0\n\t"
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+ "movel %2@(12),%1\n\t"
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+ "addxl %1,%0\n\t"
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+ "movel %3@,%1\n\t"
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+ "addxl %1,%0\n\t"
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+ "movel %3@(4),%1\n\t"
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+ "addxl %1,%0\n\t"
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+ "movel %3@(8),%1\n\t"
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+ "addxl %1,%0\n\t"
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+ "movel %3@(12),%1\n\t"
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+ "addxl %1,%0\n\t"
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+ "addxl %4,%0\n\t"
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+ "clrl %1\n\t"
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+ "addxl %1,%0"
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+ : "=&d" (sum), "=&d" (tmp)
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+ : "a" (saddr), "a" (daddr), "d" (len + proto),
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+ "0" (sum));
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+
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+ return csum_fold(sum);
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+}
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+
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+#endif /* _M68K_CHECKSUM_H */
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Greg Ungerer