s5sysmacros.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* 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 1993 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#define L_BITSMAJOR 14 /* # of SVR4 major device bits */
#define L_BITSMINOR 18 /* # of SVR4 minor device bits */
#define L_MAXMIN 0x3ffff /* MAX minor for 3b2 software drivers.
** For 3b2 hardware devices the minor is
** restricted to 256 (0-255)
*/
#define O_BITSMINOR 8 /* # of SunOS 4.x minor device bits */
#define O_MAXMAJ 0xff /* SunOS 4.x max major value */
#define O_MAXMIN 0xff /* SunOS 4.x max minor value */
/* convert to old dev format */
#define cmpdev(x) (unsigned long)((((x)>>L_BITSMINOR) > O_MAXMAJ || \
((x)&L_MAXMIN) > O_MAXMIN) ? NODEV : \
((((x)>>L_BITSMINOR)<<O_BITSMINOR)|((x)&O_MAXMIN)))