1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1991 Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef _MACHINE_PROC_H_
33#define	_MACHINE_PROC_H_
34
35#include <machine/segments.h>
36
37struct proc_ldt {
38        caddr_t ldt_base;
39        int     ldt_len;
40        int     ldt_refcnt;
41        u_long  ldt_active;
42        struct  segment_descriptor ldt_sd;
43};
44
45/*
46 * Machine-dependent part of the proc structure for i386.
47 * Table of MD locks:
48 *       t - Descriptor tables lock
49 */
50struct mdthread {
51	int	md_spinlock_count;	/* (k) */
52	register_t md_saved_flags;	/* (k) */
53	register_t md_spurflt_addr;	/* (k) Spurious page fault address. */
54};
55
56struct mdproc {
57	struct proc_ldt *md_ldt;	/* (t) per-process ldt */
58};
59
60#define	KINFO_PROC_SIZE 768
61
62#ifdef	_KERNEL
63
64#include <machine/md_var.h>
65
66void 	set_user_ldt(struct mdproc *);
67struct 	proc_ldt *user_ldt_alloc(struct mdproc *, int);
68void 	user_ldt_free(struct thread *);
69void	user_ldt_deref(struct proc_ldt *pldt);
70
71extern struct mtx dt_lock;
72#endif	/* _KERNEL */
73
74#endif /* !_MACHINE_PROC_H_ */
75