1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1993 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #define L_BITSMAJOR 14 /* # of SVR4 major device bits */ 30 #define L_BITSMINOR 18 /* # of SVR4 minor device bits */ 31 #define L_MAXMIN 0x3ffff /* MAX minor for 3b2 software drivers. 32 ** For 3b2 hardware devices the minor is 33 ** restricted to 256 (0-255) 34 */ 35 #define O_BITSMINOR 8 /* # of SunOS 4.x minor device bits */ 36 #define O_MAXMAJ 0xff /* SunOS 4.x max major value */ 37 #define O_MAXMIN 0xff /* SunOS 4.x max minor value */ 38 39 /* convert to old dev format */ 40 41 #define cmpdev(x) (unsigned long)((((x)>>L_BITSMINOR) > O_MAXMAJ || \ 42 ((x)&L_MAXMIN) > O_MAXMIN) ? NODEV : \ 43 ((((x)>>L_BITSMINOR)<<O_BITSMINOR)|((x)&O_MAXMIN))) 44