[PATCH] powerpc: merge include/asm-ppc*/checksum.h into include/asm-p…

…owerpc/checksum.h

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

include/asm-ppc64/checksum.h → include/asm-powerpc/checksum.h

@@ -1,5 +1,5 @@
-#ifndef _PPC64_CHECKSUM_H
-#define _PPC64_CHECKSUM_H
+#ifndef _ASM_POWERPC_CHECKSUM_H
+#define _ASM_POWERPC_CHECKSUM_H
 
 /*
  * This program is free software; you can redistribute it and/or
@@ -41,8 +41,14 @@ extern unsigned int csum_partial(const unsigned char * buff, int len,
 				 unsigned int sum);
 
 /*
- * the same as csum_partial, but copies from src to dst while it
- * checksums
+ * 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 unsigned int csum_partial_copy_generic(const char *src, char *dst,
 					      int len, unsigned int sum,
@@ -51,12 +57,18 @@ extern unsigned int csum_partial_copy_generic(const char *src, char *dst,
  * the same as csum_partial, but copies from src to dst while it
  * checksums.
  */
-
 unsigned int csum_partial_copy_nocheck(const char *src, 
 				       char *dst, 
 				       int len, 
 				       unsigned int sum);
 
+#define csum_partial_copy_from_user(src, dst, len, sum, errp)   \
+        csum_partial_copy_generic((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.
@@ -83,12 +95,7 @@ static inline unsigned short ip_compute_csum(unsigned char * buff, int len)
 	return csum_fold(csum_partial(buff, len, 0));
 }
 
-#define csum_partial_copy_from_user(src, dst, len, sum, errp)   \
-        csum_partial_copy_generic((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)
-
+#ifdef __powerpc64__
 static inline u32 csum_tcpudp_nofold(u32 saddr,
                                      u32 daddr,
                                      unsigned short len,
@@ -103,5 +110,23 @@ static inline u32 csum_tcpudp_nofold(u32 saddr,
 	s += (s >> 32);
 	return (u32) s;
 }
+#else
+static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
+						   unsigned long daddr,
+						   unsigned short len,
+						   unsigned short proto,
+						   unsigned int sum)
+{
+    __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<<16)+len), "0"(sum));
+    return sum;
+}
 
 #endif
+#endif