[rtems-libbsd commit] Add riscv support

[Sebastian Huber]

Module:    rtems-libbsd
Branch:    5-freebsd-12
Commit:    5cb01f277962d3127d364bf871f799b34e6b6be6
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=5cb01f277962d3127d364bf871f799b34e6b6be6

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Thu May 23 07:59:52 2019 +0200

Add riscv support

---

 freebsd/sys/riscv/include/machine/in_cksum.h | 83 ++++++++++++++++++++++++++++
 libbsd.py                                    |  2 +-
 2 files changed, 84 insertions(+), 1 deletion(-)

diff --git a/freebsd/sys/riscv/include/machine/in_cksum.h b/freebsd/sys/riscv/include/machine/in_cksum.h
new file mode 100644
index 0000000..d55b838
--- /dev/null
+++ b/freebsd/sys/riscv/include/machine/in_cksum.h
@@ -0,0 +1,83 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	from tahoe:	in_cksum.c	1.2	86/01/05
+ *	from:		@(#)in_cksum.c	1.3 (Berkeley) 1/19/91
+ *	from: Id: in_cksum.c,v 1.8 1995/12/03 18:35:19 bde Exp
+ *	from: src/sys/alpha/include/in_cksum.h,v 1.7 2005/03/02 21:33:20 joerg
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_IN_CKSUM_H_
+#define	_MACHINE_IN_CKSUM_H_	1
+
+#include <sys/cdefs.h>
+
+#define	in_cksum(m, len)	in_cksum_skip(m, len, 0)
+
+#if defined(IPVERSION) && (IPVERSION == 4)
+/*
+ * It it useful to have an Internet checksum routine which is inlineable
+ * and optimized specifically for the task of computing IP header checksums
+ * in the normal case (where there are no options and the header length is
+ * therefore always exactly five 32-bit words.
+ */
+#ifdef __CC_SUPPORTS___INLINE
+
+static __inline void
+in_cksum_update(struct ip *ip)
+{
+	int __tmpsum;
+	__tmpsum = (int)ntohs(ip->ip_sum) + 256;
+	ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16));
+}
+
+#else
+
+#define	in_cksum_update(ip)						\
+	do {								\
+		int __tmpsum;						\
+		__tmpsum = (int)ntohs(ip->ip_sum) + 256;		\
+		ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16));	\
+	} while(0)
+
+#endif
+#endif
+
+#ifdef _KERNEL
+#if defined(IPVERSION) && (IPVERSION == 4)
+u_int in_cksum_hdr(const struct ip *ip);
+#endif
+u_short in_addword(u_short sum, u_short b);
+u_short in_pseudo(u_int sum, u_int b, u_int c);
+u_short in_cksum_skip(struct mbuf *m, int len, int skip);
+#endif
+
+#endif /* _MACHINE_IN_CKSUM_H_ */
diff --git a/libbsd.py b/libbsd.py
index da3c630..3dd3308 100644
--- a/libbsd.py
+++ b/libbsd.py
@@ -4775,7 +4775,7 @@ class in_cksum(builder.Module):
         self.addCPUDependentFreeBSDSourceFiles(
             [
                 'arm', 'avr', 'bfin', 'h8300', 'lm32', 'm32c', 'm32r', 'm68k',
-                'mips', 'nios2', 'sh', 'sparc', 'v850'
+                'mips', 'nios2', 'riscv', 'sh', 'sparc', 'v850'
             ],
             [
                 'sys/mips/mips/in_cksum.c',