1/* $NetBSD: pcb.h,v 1.61 2025/04/24 09:29:09 kre Exp $ */
2
3/*
4 * Copyright (c) 1998, 2009 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum, and by Andrew Doran.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Copyright (c) 1990 The Regents of the University of California.
34 * All rights reserved.
35 *
36 * This code is derived from software contributed to Berkeley by
37 * William Jolitz.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. Neither the name of the University nor the names of its contributors
48 * may be used to endorse or promote products derived from this software
49 * without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * SUCH DAMAGE.
62 *
63 * @(#)pcb.h 5.10 (Berkeley) 5/12/91
64 */
65
66/*
67 * Intel 386 process control block
68 */
69
70#ifndef _I386_PCB_H_
71#define _I386_PCB_H_
72
73#if defined(_KERNEL_OPT)
74#include "opt_multiprocessor.h"
75#endif
76
77#include <machine/segments.h>
78#include <x86/cpu_extended_state.h>
79
80struct pcb {
81 int pcb_esp0; /* ring0 esp */
82 int pcb_esp; /* kernel esp */
83 int pcb_ebp; /* kernel ebp */
84 int pcb_cr0; /* saved image of CR0 */
85 int pcb_cr2; /* page fault address (CR2) */
86 int pcb_cr3; /* page directory pointer */
87 int pcb_iopl; /* i/o privilege level */
88
89 struct segment_descriptor pcb_fsd; /* %fs descriptor */
90 struct segment_descriptor pcb_gsd; /* %gs descriptor */
91 void *pcb_onfault; /* copyin/out fault recovery */
92 char *pcb_iomap; /* I/O permission bitmap */
93 struct dbreg *pcb_dbregs; /* CPU Debug Registers */
94 uint16_t pcb_fpu_dflt_cw;
95
96#define PCB_DBREGS 0x01
97 int pcb_flags;
98
99 int not_used[15];
100
101 /* floating point state */
102 union savefpu pcb_savefpu[1] __aligned(64);
103#define pcb_savefpusmall pcb_savefpu
104 /* **** DO NOT ADD ANYTHING HERE **** */
105
106};
107#ifndef __lint__
108#include <sys/stddef.h> /* for offsetof() */
109
110/* This doesn't really matter, but there is a lot of implied padding */
111__CTASSERT(offsetof(struct pcb, pcb_savefpu) == 128);
112__CTASSERT(sizeof(struct pcb) - sizeof (union savefpu) == 128);
113#endif
114
115#endif /* _I386_PCB_H_ */