psl.h revision 1998 
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	from: @(#)psl.h	5.2 (Berkeley) 1/18/91
37 *	$Id: psl.h,v 1.4 1994/02/24 00:21:12 hsu Exp $
38 */
39
40#ifndef _MACHINE_PSL_H_
41#define _MACHINE_PSL_H_ 1
42
43/*
44 * 386 processor status longword.
45 */
46#define	PSL_C		0x00000001	/* carry bit */
47#define	PSL_PF		0x00000004	/* parity bit */
48#define	PSL_AF		0x00000010	/* bcd carry bit */
49#define	PSL_Z		0x00000040	/* zero bit */
50#define	PSL_N		0x00000080	/* negative bit */
51#define	PSL_T		0x00000100	/* trace enable bit */
52#define	PSL_I		0x00000200	/* interrupt enable bit */
53#define	PSL_D		0x00000400	/* string instruction direction bit */
54#define	PSL_V		0x00000800	/* overflow bit */
55#define	PSL_IOPL	0x00003000	/* i/o priviledge level enable */
56#define	PSL_NT		0x00004000	/* nested task bit */
57#define	PSL_RF		0x00010000	/* restart flag bit */
58#define	PSL_VM		0x00020000	/* virtual 8086 mode bit */
59#define	PSL_AC		0x00040000	/* alignment checking */
60#define	PSL_VIF		0x00080000	/* virtual interrupt enable */
61#define	PSL_VIP		0x00100000	/* virtual interrupt pending */
62#define	PSL_ID		0x00200000	/* identification bit */
63
64#define	PSL_MBZ		0xffc08028	/* must be zero bits */
65#define	PSL_MBO		0x00000002	/* must be one bits */
66
67#define	PSL_USERSET	(PSL_MBO | PSL_I)
68#define	PSL_USERCLR	(PSL_MBZ | PSL_NT)
69#endif /* _MACHINE_PSL_H_ */
70