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/* 32 * Mach Operating System 33 * Copyright (c) 1991,1990 Carnegie Mellon University 34 * All Rights Reserved. 35 * 36 * Permission to use, copy, modify and distribute this software and its 37 * documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie Mellon 54 * the rights to redistribute these changes. 55 */ 56/* 57 */ 58 59/* 60 * Kernel task state segment. 61 * 62 * We don't use the i386 task switch mechanism. We need a TSS 63 * only to hold the kernel stack pointer for the current thread. 64 */ 65#include <i386/tss.h> 66#include <i386/pmap.h> 67 68#ifdef __i386__ 69struct i386_tss master_ktss 70 __attribute__ ((section ("__DESC, master_ktss"))) 71 __attribute__ ((aligned (4096))) = { 72 0, /* back link */ 73 0, /* esp0 */ 74 KERNEL_DS, /* ss0 */ 75 0, /* esp1 */ 76 0, /* ss1 */ 77 0, /* esp2 */ 78 0, /* ss2 */ 79 0, /* cr3 */ 80 0, /* eip */ 81 0, /* eflags */ 82 0, /* eax */ 83 0, /* ecx */ 84 0, /* edx */ 85 0, /* ebx */ 86 0, /* esp */ 87 0, /* ebp */ 88 0, /* esi */ 89 0, /* edi */ 90 0, /* es */ 91 0, /* cs */ 92 0, /* ss */ 93 0, /* ds */ 94 0, /* fs */ 95 0, /* gs */ 96 KERNEL_LDT, /* ldt */ 97 0, /* trace_trap */ 98 0x0FFF /* IO bitmap offset - 99 beyond end of TSS segment, 100 so no bitmap */ 101}; 102#endif 103 104/* 105 * The transient stack for sysenter. 106 * At its top is a 32-bit link to the PCB in legacy mode, 64-bit otherwise. 107 * NB: it also must be large enough to contain a interrupt stack frame 108 * due to a single-step trace trap at system call entry. 109 */ 110struct sysenter_stack master_sstk 111 __attribute__ ((section ("__DESC, master_sstk"))) 112 __attribute__ ((aligned (16))) = { {0}, 0 }; 113 114#ifdef X86_64 115struct x86_64_tss master_ktss64 __attribute__ ((aligned (4096))) = { 116 .io_bit_map_offset = 0x0FFF, 117}; 118#endif /* X86_64 */ 119 120#ifdef __i386__ 121/* 122 * Task structure for double-fault handler: 123 */ 124struct i386_tss master_dftss 125 __attribute__ ((section ("__DESC, master_dftss"))) 126 __attribute__ ((aligned (4096))) = { 127 0, /* back link */ 128 (int) &df_task_stack_end - 4, /* esp0 */ 129 KERNEL_DS, /* ss0 */ 130 0, /* esp1 */ 131 0, /* ss1 */ 132 0, /* esp2 */ 133 0, /* ss2 */ 134 (int) IdlePDPT, /* cr3 */ 135 (int) &df_task_start, /* eip */ 136 0, /* eflags */ 137 0, /* eax */ 138 0, /* ecx */ 139 0, /* edx */ 140 0, /* ebx */ 141 (int) &df_task_stack_end - 4, /* esp */ 142 0, /* ebp */ 143 0, /* esi */ 144 0, /* edi */ 145 KERNEL_DS, /* es */ 146 KERNEL32_CS, /* cs */ 147 KERNEL_DS, /* ss */ 148 KERNEL_DS, /* ds */ 149 KERNEL_DS, /* fs */ 150 CPU_DATA_GS, /* gs */ 151 KERNEL_LDT, /* ldt */ 152 0, /* trace_trap */ 153 0x0FFF /* IO bitmap offset - 154 beyond end of TSS segment, 155 so no bitmap */ 156}; 157 158 159/* 160 * Task structure for machine_check handler: 161 */ 162struct i386_tss master_mctss 163 __attribute__ ((section ("__DESC, master_mctss"))) 164 __attribute__ ((aligned (4096))) = { 165 0, /* back link */ 166 (int) &mc_task_stack_end - 4, /* esp0 */ 167 KERNEL_DS, /* ss0 */ 168 0, /* esp1 */ 169 0, /* ss1 */ 170 0, /* esp2 */ 171 0, /* ss2 */ 172 (int) IdlePDPT, /* cr3 */ 173 (int) &mc_task_start, /* eip */ 174 0, /* eflags */ 175 0, /* eax */ 176 0, /* ecx */ 177 0, /* edx */ 178 0, /* ebx */ 179 (int) &mc_task_stack_end - 4, /* esp */ 180 0, /* ebp */ 181 0, /* esi */ 182 0, /* edi */ 183 KERNEL_DS, /* es */ 184 KERNEL32_CS, /* cs */ 185 KERNEL_DS, /* ss */ 186 KERNEL_DS, /* ds */ 187 KERNEL_DS, /* fs */ 188 CPU_DATA_GS, /* gs */ 189 KERNEL_LDT, /* ldt */ 190 0, /* trace_trap */ 191 0x0FFF /* IO bitmap offset - 192 beyond end of TSS segment, 193 so no bitmap */ 194}; 195 196#endif /* __i386__ */ 197