xref: /illumos-gate/usr/src/uts/intel/sys/segment.h (revision b4203d75)
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 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1990, 1991 UNIX System Laboratories, Inc.	*/
28 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
29 /*	  All Rights Reserved	*/
30 
31 #ifndef	_SYS_SEGMENT_H
32 #define	_SYS_SEGMENT_H
33 
34 #ifdef	__cplusplus
35 extern "C" {
36 #endif
37 
38 /* access rights for data segments */
39 #define	UDATA_ACC1	0xF2 	/* present dpl=3 writable */
40 #define	DATA_ACC2	0xC	/* 4Kbyte gran. 4Gb limit avl=0 */
41 #define	DATA_ACC2_S	0x4	/* 1 byte gran., 32bit operands, avl=0 */
42 #define	UTEXT_ACC1	0xFA 	/* present dpl=3 readable */
43 #define	TEXT_ACC2	0xC	/* 4Kbyte gran., 32 bit operands avl=0 */
44 #define	TEXT_ACC2_S	0x4	/* 1 byte gran., 32 bit operands avl=0 */
45 #define	LDT_UACC1	0xE2	/* present dpl=3 type=ldt */
46 #define	LDT_ACC2	0x0	/* G=0 avl=0 */
47 #define	TGATE_UACC1	0xE5	/* present dpl=3 type=task gate		*/
48 #define	SEG_CONFORM	0X4	/* conforming bit in acc0007 */
49 
50 #define	LDT_TYPE	0x2	/* type of segment is LDT */
51 
52 
53 /* access rights field for gates */
54 
55 #define	GATE_UACC	0xE0		/* present and dpl = 3 */
56 #define	GATE_386CALL	0xC		/* 386 call gate */
57 
58 #ifdef	__cplusplus
59 }
60 #endif
61 
62 #endif	/* _SYS_SEGMENT_H */
63