1/*	$OpenBSD: pcb.h,v 1.25 2022/02/21 14:26:19 jsg Exp $	*/
2/*	$NetBSD: pcb.h,v 1.21 1996/01/08 13:51:42 mycroft Exp $	*/
3
4/*-
5 * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
6 * Copyright (c) 1990 The Regents of the University of California.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * William Jolitz.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. 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 *	@(#)pcb.h	5.10 (Berkeley) 5/12/91
37 */
38
39/*
40 * Intel 386 process control block
41 */
42
43#ifndef _MACHINE_PCB_H_
44#define _MACHINE_PCB_H_
45
46#include <sys/signal.h>
47
48#include <machine/segments.h>
49#include <machine/npx.h>
50#include <machine/sysarch.h>
51
52/*
53 * Please note that pcb_savefpu must be aligned to 16 bytes.
54 */
55struct pcb {
56	union	savefpu pcb_savefpu;	/* floating point state for FPU */
57	int	pcb_cr3;
58	int	pcb_esp;
59	int	pcb_ebp;
60	int	pcb_kstack;		/* kernel stack address */
61	int	pcb_cr0;		/* saved image of CR0 */
62	caddr_t	pcb_onfault;		/* copyin/out fault recovery */
63	struct	segment_descriptor pcb_threadsegs[2];
64					/* per-thread descriptors */
65	int	vm86_eflags;		/* virtual eflags for vm86 mode */
66	int	vm86_flagmask;		/* flag mask for vm86 mode */
67	void	*vm86_userp;		/* XXX performance hack */
68	struct  pmap *pcb_pmap;         /* back pointer to our pmap */
69	struct	cpu_info *pcb_fpcpu;	/* cpu holding our fpu state */
70	int	pcb_flags;
71#define PCB_SAVECTX	0x00000001
72};
73
74/* the indexes of the %fs/%gs segments in pcb_threadsegs */
75#define	TSEG_FS		0
76#define	TSEG_GS		1
77
78#endif /* _MACHINE_PCB_H_ */
79