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diff --git a/usr/src/uts/sun4u/sys/fc_plat.h b/usr/src/uts/sun4u/sys/fc_plat.h
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+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 1998 by Sun Microsystems, Inc.
+ * All rights reserved.
+ */
+
+#ifndef	_SYS_FC_PLAT_H
+#define	_SYS_FC_PLAT_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/inttypes.h>
+#include <sys/obpdefs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Platform specific definitions for the fcode interpreter and driver.
+ * Define the cell size for the implementation.
+ *
+ * These definitions are appropriate for SPARC V9.
+ */
+
+/*
+ * The cell size is based on the cell size of the underlying "firmware"
+ * implementation.  NB: FCode is really a 32-bit language, but we still
+ * define our interfaces in terms of the underlying cell size.
+ */
+
+typedef unsigned long long fc_cell_t;
+
+/*
+ * common typedef for phandles accross the interface.
+ */
+typedef uint32_t fc_phandle_t;
+
+/*
+ * Handy macros for converting from an fc_cell_t to an integral type
+ * These are useful because arguments and results are always passed
+ * in an array of fc_cell_t's.
+ */
+
+#define	fc_ptr2cell(p)		((fc_cell_t)((uintptr_t)((void *)(p))))
+#define	fc_int2cell(i)		((fc_cell_t)((int)(i)))
+#define	fc_uint2cell(u)		((fc_cell_t)((unsigned int)(u)))
+#define	fc_uint32_t2cell(u)	((fc_cell_t)((unsigned int)((uint32_t)(u))))
+#define	fc_uint16_t2cell(w)	((fc_cell_t)((unsigned int)((uint16_t)(w))))
+#define	fc_uint8_t2cell(b)	((fc_cell_t)((unsigned int)((uint8_t)(b))))
+#define	fc_size2cell(u)		((fc_cell_t)((size_t)(u)))
+#define	fc_ssize2cell(i)	((fc_cell_t)((ssize_t)(i)))
+#define	fc_phandle2cell(ph)	((fc_cell_t)((unsigned int)((phandle_t)(ph))))
+#define	fc_dnode2cell(d)	((fc_cell_t)((unsigned int)((dnode_t)(d))))
+#define	fc_ull2cell_high(ll)	(0LL)
+#define	fc_ull2cell_low(ll)	((fc_cell_t)(ll))
+#define	fc_uintptr2cell(i)	((fc_cell_t)((uintptr_t)(i)))
+#define	fc_uchar2cell(c)	((fc_cell_t)((unsigned char)(c)))
+#define	fc_ushort2cell(w)	((fc_cell_t)((unsigned short)(w)))
+#define	fc_ihandle2cell(h)	((fc_cell_t)((fc_ihandle_t)(h)))
+
+#define	fc_cell2ptr(p)		((void *)((fc_cell_t)(p)))
+#define	fc_cell2int(i)		((int)((fc_cell_t)(i)))
+#define	fc_cell2uint(u)		((unsigned int)((fc_cell_t)(u)))
+#define	fc_cell2uint32_t(u)	((uint32_t)((fc_cell_t)(u)))
+#define	fc_cell2uint16_t(w)	((uint16_t)((fc_cell_t)(w)))
+#define	fc_cell2uint8_t(b)	((uint8_t)((fc_cell_t)(b)))
+#define	fc_cell2size(u)		((size_t)((fc_cell_t)(u)))
+#define	fc_cell2ssize(i)	((ssize_t)((fc_cell_t)(i)))
+#define	fc_cell2phandle(ph)	((phandle_t)((fc_cell_t)(ph)))
+#define	fc_cell2dnode(d)	((dnode_t)((fc_cell_t)(d)))
+#define	fc_cells2ull(h, l)	((unsigned long long)(fc_cell_t)(l))
+#define	fc_cell2uintptr(i)	((uintptr_t)((fc_cell_t)(i)))
+#define	fc_cell2uchar(c)	((unsigned char)(fc_cell_t)(c))
+#define	fc_cell2ushort(w)	((unsigned short)(fc_cell_t)(w))
+#define	fc_cell2ihandle(h)	((fc_ihandle_t)(fc_cell_t)(h))
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_FC_PLAT_H */