sys/i386/include/psl.h

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      from: @(#)psl.h 5.2 (Berkeley) 1/18/91
 *      $Id: psl.h,v 1.2 1993/10/16 14:39:26 rgrimes Exp $
 */

#ifndef _MACHINE_PSL_H_
#define _MACHINE_PSL_H_ 1

/*
 * 386 processor status longword.
 */
#define PSL_C           0x00000001      /* carry bit */
#define PSL_PF          0x00000004      /* parity bit */
#define PSL_AF          0x00000010      /* bcd carry bit */
#define PSL_Z           0x00000040      /* zero bit */
#define PSL_N           0x00000080      /* negative bit */
#define PSL_T           0x00000100      /* trace enable bit */
#define PSL_I           0x00000200      /* interrupt enable bit */
#define PSL_D           0x00000400      /* string instruction direction bit */
#define PSL_V           0x00000800      /* overflow bit */
#define PSL_IOPL        0x00003000      /* i/o priviledge level enable */
#define PSL_NT          0x00004000      /* nested task bit */
#define PSL_RF          0x00010000      /* restart flag bit */
#define PSL_VM          0x00020000      /* virtual 8086 mode bit */

#define PSL_MBZ         0xfffc7fb7      /* must be zero bits */
#define PSL_MBO         0x00000002      /* must be one bits */

#define PSL_USERSET     (PSL_IOPL)
#define PSL_USERCLR     (PSL_I|PSL_NT)
#endif /* _MACHINE_PSL_H_ */