1/* $NetBSD: pcb.h,v 1.35 2025/04/28 13:01:27 riastradh Exp $ */
2
3/*
4 * Copyright (c) 1998 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.
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 * XXXfvdl these copyrights don't really match anymore
68 */
69
70#ifndef _AMD64_PCB_H_
71#define _AMD64_PCB_H_
72
73#ifdef __x86_64__
74
75#include <x86/cpu_extended_state.h>
76#include <amd64/reg.h>
77
78#define NIOPORTS 1024 /* # of ports we allow to be mapped */
79
80/*
81 * IMPORTANT NOTE: this structure, including the variable-sized FPU state at
82 * the end, must fit within one page.
83 */
84struct pcb {
85 int pcb_flags;
86#define PCB_COMPAT32 0x01
87#define PCB_DBREGS 0x02
88 u_int pcb_cr0; /* saved image of CR0 */
89 uint64_t pcb_rsp0;
90 uint64_t pcb_cr2; /* page fault address (CR2) */
91 uint64_t pcb_cr3;
92 uint64_t pcb_rsp;
93 uint64_t pcb_rbp;
94 void *pcb_onfault; /* copyin/out fault recovery */
95 uint64_t pcb_fs;
96 uint64_t pcb_gs;
97 struct dbreg *pcb_dbregs;
98 uint16_t pcb_fpu_dflt_cw;
99 int pcb_iopl;
100#ifdef XENPV /* XXX XENPV PR kern/59371 */
101 uint32_t pcb_unused[8]; /* unused */
102 union savefpu pcb_savefpu[1] __aligned(64);
103#define pcb_savefpusmall pcb_savefpu
104#else
105 union savefpu *pcb_savefpu;
106
107 uint32_t pcb_unused[6]; /* unused */
108
109 /* fpu state, if it fits; otherwise allocated separately */
110 union savefpu pcb_savefpusmall __aligned(64);
111#endif
112 /* **** DO NOT ADD ANYTHING HERE **** */
113};
114#ifndef __lint__
115#include <sys/stddef.h> /* for offsetof() */
116
117__CTASSERT(offsetof(struct pcb, pcb_savefpusmall) == 128);
118__CTASSERT(sizeof(struct pcb) - sizeof (union savefpu) == 128);
119#endif
120
121#else /* __x86_64__ */
122
123#include <i386/pcb.h>
124
125#endif /* __x86_64__ */
126
127#endif /* _AMD64_PCB_H_ */