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 37 struct cpu_info; 38 void gdt_init(void); 39 void gdt_init_cpu(struct cpu_info *); 40 void gdt_alloc_cpu(struct cpu_info *); 41 42 #ifdef _LP64 43 struct x86_64_tss; 44 int tss_alloc(struct x86_64_tss *); 45 #else 46 struct i386tss; 47 int tss_alloc(const struct i386tss *); 48 #endif 49 50 void tss_free(int); 51 int ldt_alloc(void *, size_t); 52 void 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_ */ 68