/* $OpenBSD: gdt.h,v 1.11 2008/06/26 05:42:10 ray Exp $ */ /* $NetBSD: gdt.h,v 1.7.10.6 2002/08/19 01:22:36 sommerfeld Exp $ */ /*- * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by John T. Kohl and Charles M. Hannum. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _LOCORE struct cpu_info; struct pcb; struct pmap; union descriptor; void gdt_alloc_cpu(struct cpu_info *); int gdt_get_slot(void); void gdt_init(void); void gdt_init_cpu(struct cpu_info *); void gdt_reload_cpu(/* XXX struct cpu_info * */ void); void ldt_alloc(struct pmap *, union descriptor *, size_t); void ldt_free(struct pmap *); int tss_alloc(struct pcb *); void tss_free(int); void setgdt(int, void *, size_t, int, int, int, int); #endif /* * The initial GDT size (as a descriptor count), and the maximum * GDT size possible. * * These are actually not arbitrary. To start with, they have to be * multiples of 512 and at least 512, in order to work with the * allocation strategy set forth by gdt_init and gdt_grow. Then, the * max cannot exceed 65536 since the selector field of a descriptor is * just 16 bits, and used as free list link. */ #define MINGDTSIZ 512 #define MAXGDTSIZ 8192