1 /* $OpenBSD: gdt.h,v 1.4 2009/02/03 11:24:19 mikeb Exp $ */ 2 /* $NetBSD: gdt.h,v 1.1 2003/04/26 18:39:40 fvdl Exp $ */ 3 4 /*- 5 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by John T. Kohl and Charles M. Hannum. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _LOCORE 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 void gdt_alloc_cpu(struct cpu_info *); 41 42 int tss_alloc(struct pcb *); 43 void tss_free(int); 44 45 void ldt_alloc(struct pmap *, char *, size_t); 46 void ldt_free(struct pmap *); 47 48 void set_mem_gdt(struct mem_segment_descriptor *, void *, size_t, 49 int, int, int, int, int); 50 void set_sys_gdt(struct sys_segment_descriptor *, void *, size_t, int, int, 51 int); 52 #endif 53 54 /* 55 * Maximum GDT size. It cannot exceed 65536 since the selector field of 56 * a descriptor is just 16 bits, and used as free list link. 57 */ 58 #define MAXGDTSIZ 65536 59