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-rw-r--r--arch/microblaze/include/asm/checksum.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/checksum.h b/arch/microblaze/include/asm/checksum.h
new file mode 100644
index 000000000..2e5ebd599
--- /dev/null
+++ b/arch/microblaze/include/asm/checksum.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2008 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ */
+
+#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, __u32 len,
+ __u8 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 */