sys/arch/i386/include/gdt.h

   1 /*      $NetBSD: gdt.h,v 1.13 2008/04/28 20:23:24 martin 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 #if !defined(_LOCORE)
  33
  34 struct proc;
  35 struct pmap;
  36
  37 void gdt_init(void);
  38 void gdt_init_cpu(struct cpu_info *);
  39 void gdt_reload_cpu(struct cpu_info *);
  40 int gdt_get_slot(void);
  41 void gdt_put_slot(int);
  42 void gdt_alloc_cpu(struct cpu_info *);
  43 int tss_alloc(const struct i386tss *);
  44 void tss_free(int);
  45 int ldt_alloc(union descriptor *, size_t);
  46 void ldt_free(int);
  47
  48 #endif /* LOCORE */
  49
  50 #define MINGDTSIZ       512
  51 #define MAXGDTSIZ       8192