Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / microblaze / include / asm / checksum.h

diff --git a/kernel/arch/microblaze/include/asm/checksum.h b/kernel/arch/microblaze/include/asm/checksum.h
new file mode 100644 (file)
index 0000000..0185cbe
--- /dev/null
+++ b/kernel/arch/microblaze/include/asm/checksum.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2008 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * 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.
+ */
+
+#ifndef _ASM_MICROBLAZE_CHECKSUM_H
+#define _ASM_MICROBLAZE_CHECKSUM_H
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+#define csum_tcpudp_nofold     csum_tcpudp_nofold
+static inline __wsum
+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
+                  unsigned short proto, __wsum sum)
+{
+       __asm__("add %0, %0, %1\n\t"
+               "addc %0, %0, %2\n\t"
+               "addc %0, %0, %3\n\t"
+               "addc %0, %0, r0\n\t"
+               : "+&d" (sum)
+               : "d" (saddr), "d" (daddr),
+#ifdef __MICROBLAZEEL__
+       "d" ((len + proto) << 8)
+#else
+       "d" (len + proto)
+#endif
+);
+       return sum;
+}
+
+#include <asm-generic/checksum.h>
+
+#endif /* _ASM_MICROBLAZE_CHECKSUM_H */