Import DPAA driver snapshot

Imported from Freescale Linux repository

git://git.freescale.com/ppc/upstream/linux.git

commit 2774c204cd8bfc56a200ff4dcdfc9cdf5b6fc161.

Linux compatibility layer is partly from FreeBSD.

rtemsbsd/powerpc/include/linux/page.h

@@ -0,0 +1,53 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
+ * 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 unmodified, 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 ``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 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.
+ *
+ * $FreeBSD$
+ */
+#ifndef	_LINUX_PAGE_H_
+#define _LINUX_PAGE_H_
+
+#include <linux/types.h>
+
+#include <sys/param.h>
+
+#include <machine/atomic.h>
+#include <vm/vm.h>
+#include <vm/vm_page.h>
+
+#define page	vm_page
+
+#define	virt_to_page(x)	PHYS_TO_VM_PAGE(vtophys((x)))
+
+#define	clear_page(page)		memset((page), 0, PAGE_SIZE)
+#define	pgprot_noncached(prot)		VM_MEMATTR_UNCACHEABLE
+#define	pgprot_writecombine(prot)	VM_MEMATTR_WRITE_COMBINING
+
+#undef	PAGE_MASK
+#define	PAGE_MASK	(~(PAGE_SIZE-1))
+
+#endif	/* _LINUX_PAGE_H_ */