1/* 2 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * @OSF_COPYRIGHT@ 30 */ 31/* CMU_ENDHIST */ 32/* 33 * Mach Operating System 34 * Copyright (c) 1991,1990 Carnegie Mellon University 35 * All Rights Reserved. 36 * 37 * Permission to use, copy, modify and distribute this software and its 38 * documentation is hereby granted, provided that both the copyright 39 * notice and this permission notice appear in all copies of the 40 * software, derivative works or modified versions, and any portions 41 * thereof, and that both notices appear in supporting documentation. 42 * 43 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 44 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 45 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 46 * 47 * Carnegie Mellon requests users of this software to return to 48 * 49 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 50 * School of Computer Science 51 * Carnegie Mellon University 52 * Pittsburgh PA 15213-3890 53 * 54 * any improvements or extensions that they make and grant Carnegie Mellon 55 * the rights to redistribute these changes. 56 */ 57/* 58 */ 59 60/* 61 * Global descriptor table. 62 */ 63#include <mach/machine.h> 64#include <mach/i386/vm_param.h> 65#include <kern/thread.h> 66#include <i386/cpu_data.h> 67#include <i386/mp_desc.h> 68 69struct fake_descriptor master_gdt[GDTSZ] __attribute__ ((aligned (4096))) = { 70 [SEL_TO_INDEX(KERNEL_CS)] { /* kernel code */ 71 0, 72 0xfffff, 73 SZ_32|SZ_G, 74 ACC_P|ACC_PL_K|ACC_CODE_R, 75 }, 76 [SEL_TO_INDEX(KERNEL_DS)] { /* kernel data */ 77 0, 78 0xfffff, 79 SZ_32|SZ_G, 80 ACC_P|ACC_PL_K|ACC_DATA_W 81 }, 82 [SEL_TO_INDEX(KERNEL_LDT)] { /* local descriptor table */ 83 (uint32_t) &master_ldt, 84 LDTSZ_MIN*sizeof(struct fake_descriptor)-1, 85 0, 86 ACC_P|ACC_PL_K|ACC_LDT 87 }, /* The slot KERNEL_LDT_2 is reserved. */ 88 [SEL_TO_INDEX(KERNEL_TSS)] { /* TSS for this processor */ 89 (uint32_t) &master_ktss, 90 sizeof(struct i386_tss)-1, 91 0, 92 ACC_P|ACC_PL_K|ACC_TSS 93 }, /* The slot KERNEL_TSS_2 is reserved. */ 94 [SEL_TO_INDEX(CPU_DATA_GS)] { /* per-CPU current thread address */ 95 (uint32_t) &cpu_data_master, 96 sizeof(cpu_data_t)-1, 97 SZ_32, 98 ACC_P|ACC_PL_K|ACC_DATA_W 99 }, 100 [SEL_TO_INDEX(USER_LDT)] { /* user local descriptor table */ 101 (uint32_t) &master_ldt, 102 LDTSZ_MIN*sizeof(struct fake_descriptor)-1, 103 0, 104 ACC_P|ACC_PL_K|ACC_LDT 105 }, 106 [SEL_TO_INDEX(KERNEL64_CS)] { /* kernel 64-bit code */ 107 0, 108 0xfffff, 109 SZ_64|SZ_G, 110 ACC_P|ACC_PL_K|ACC_CODE_R 111 }, 112 [SEL_TO_INDEX(KERNEL64_SS)] { /* kernel 64-bit syscall stack */ 113 0, 114 0xfffff, 115 SZ_32|SZ_G, 116 ACC_P|ACC_PL_K|ACC_DATA_W 117 }, 118#if MACH_KDB 119 [SEL_TO_INDEX(DEBUG_TSS)] { /* TSS for this processor */ 120 (uint32_t)&master_dbtss, 121 sizeof(struct i386_tss)-1, 122 0, 123 ACC_P|ACC_PL_K|ACC_TSS 124 }, 125#endif /* MACH_KDB */ 126}; 127