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diff --git a/tools/build/cross-build/include/common/sys/param.h b/tools/build/cross-build/include/common/sys/param.h
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+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org>
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory (Department of Computer Science and
+ * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
+ * DARPA SSITH research programme.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+#pragma once
+
+#include_next <sys/param.h>
+
+#ifndef BLKDEV_IOSIZE
+#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */
+#endif
+#ifndef DFLTPHYS
+#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
+#endif
+#ifndef MAXPHYS
+#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
+#endif
+#ifndef MAXDUMPPGS
+#define MAXDUMPPGS (DFLTPHYS / PAGE_SIZE)
+#endif
+
+#ifndef MCLSHIFT
+#define MCLSHIFT 11 /* convert bytes to mbuf clusters */
+#endif
+
+#ifndef MCLBYTES
+#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */
+#endif
+
+#ifndef __PAST_END
+#define __PAST_END(array, offset) (((__typeof__(*(array)) *)(array))[offset])
+#endif