1/*	$NetBSD: gdt.h,v 1.1 2021/04/30 15:37:05 christos Exp $	*/
 2
 3/*-
 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
 5 * All rights reserved.
 6 *
 7 * This code is derived from software contributed to The NetBSD Foundation
 8 * by John T. Kohl and 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#ifndef _X86_GDT_H_
33#define _X86_GDT_H_
34
35#if !defined(_LOCORE)
36
37struct cpu_info;
38void gdt_init(void);
39void gdt_init_cpu(struct cpu_info *);
40void gdt_alloc_cpu(struct cpu_info *);
41
42#ifdef _LP64
43struct x86_64_tss;
44int tss_alloc(struct x86_64_tss *);
45#else
46struct i386tss;
47int tss_alloc(const struct i386tss *);
48#endif
49
50void tss_free(int); 
51int ldt_alloc(void *, size_t);
52void ldt_free(int);
53
54#endif /* LOCORE */
55
56
57#ifndef MAXGDTSIZ
58# define MAXGDTSIZ		65536	/* XXX: see <x86/pmap.h> */
59#endif
60
61#ifndef MAX_USERLDT_SIZE
62# define MAX_USERLDT_SIZE	65536	/* XXX: see <x86/pmap.h> */
63#endif
64
65#define MAX_USERLDT_SLOTS	(int)(MAX_USERLDT_SIZE / sizeof(union descriptor))
66
67#endif /* _X86_GDT_H_ */