89 lines
3.8 KiB
C
89 lines
3.8 KiB
C
/*-
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_PSL_H_
|
|
#define _MACHINE_PSL_H_
|
|
|
|
/*
|
|
* 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 privilege level */
|
|
#define PSL_NT 0x00004000 /* nested task bit */
|
|
#define PSL_RF 0x00010000 /* resume flag bit */
|
|
#define PSL_VM 0x00020000 /* virtual 8086 mode bit */
|
|
#define PSL_AC 0x00040000 /* alignment checking */
|
|
#define PSL_VIF 0x00080000 /* virtual interrupt enable */
|
|
#define PSL_VIP 0x00100000 /* virtual interrupt pending */
|
|
#define PSL_ID 0x00200000 /* identification bit */
|
|
|
|
/*
|
|
* The i486 manual says that we are not supposed to change reserved flags,
|
|
* but this is too much trouble since the reserved flags depend on the cpu
|
|
* and setting them to their historical values works in practice.
|
|
*/
|
|
#define PSL_RESERVED_DEFAULT 0x00000002
|
|
|
|
/*
|
|
* Initial flags for kernel and user mode. The kernel later inherits
|
|
* PSL_I and some other flags from user mode.
|
|
*/
|
|
#define PSL_KERNEL PSL_RESERVED_DEFAULT
|
|
#define PSL_USER (PSL_RESERVED_DEFAULT | PSL_I)
|
|
|
|
/*
|
|
* Bits that can be changed in user mode on 486's. We allow these bits
|
|
* to be changed using ptrace(), sigreturn() and procfs. Setting PS_NT
|
|
* is undesirable but it may as well be allowed since users can inflict
|
|
* it on the kernel directly. Changes to PSL_AC are silently ignored on
|
|
* 386's.
|
|
*/
|
|
#define PSL_USERCHANGE (PSL_C | PSL_PF | PSL_AF | PSL_Z | PSL_N | PSL_T \
|
|
| PSL_D | PSL_V | PSL_NT | PSL_AC)
|
|
|
|
#endif /* !_MACHINE_PSL_H_ */
|