/* * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * Kernel task state segment. * * We don't use the i386 task switch mechanism. We need a TSS * only to hold the kernel stack pointer for the current thread. */ #include <i386/tss.h> #include <i386/pmap.h> #ifdef __i386__ struct i386_tss master_ktss __attribute__ ((section ("__DESC, master_ktss"))) __attribute__ ((aligned (4096))) = { 0, /* back link */ 0, /* esp0 */ KERNEL_DS, /* ss0 */ 0, /* esp1 */ 0, /* ss1 */ 0, /* esp2 */ 0, /* ss2 */ 0, /* cr3 */ 0, /* eip */ 0, /* eflags */ 0, /* eax */ 0, /* ecx */ 0, /* edx */ 0, /* ebx */ 0, /* esp */ 0, /* ebp */ 0, /* esi */ 0, /* edi */ 0, /* es */ 0, /* cs */ 0, /* ss */ 0, /* ds */ 0, /* fs */ 0, /* gs */ KERNEL_LDT, /* ldt */ 0, /* trace_trap */ 0x0FFF /* IO bitmap offset - beyond end of TSS segment, so no bitmap */ }; #endif /* * The transient stack for sysenter. * At its top is a 32-bit link to the PCB in legacy mode, 64-bit otherwise. * NB: it also must be large enough to contain a interrupt stack frame * due to a single-step trace trap at system call entry. */ struct sysenter_stack master_sstk __attribute__ ((section ("__DESC, master_sstk"))) __attribute__ ((aligned (16))) = { {0}, 0 }; #ifdef X86_64 struct x86_64_tss master_ktss64 __attribute__ ((aligned (4096))) = { .io_bit_map_offset = 0x0FFF, }; #endif /* X86_64 */ #ifdef __i386__ /* * Task structure for double-fault handler: */ struct i386_tss master_dftss __attribute__ ((section ("__DESC, master_dftss"))) __attribute__ ((aligned (4096))) = { 0, /* back link */ (int) &df_task_stack_end - 4, /* esp0 */ KERNEL_DS, /* ss0 */ 0, /* esp1 */ 0, /* ss1 */ 0, /* esp2 */ 0, /* ss2 */ (int) IdlePDPT, /* cr3 */ (int) &df_task_start, /* eip */ 0, /* eflags */ 0, /* eax */ 0, /* ecx */ 0, /* edx */ 0, /* ebx */ (int) &df_task_stack_end - 4, /* esp */ 0, /* ebp */ 0, /* esi */ 0, /* edi */ KERNEL_DS, /* es */ KERNEL32_CS, /* cs */ KERNEL_DS, /* ss */ KERNEL_DS, /* ds */ KERNEL_DS, /* fs */ CPU_DATA_GS, /* gs */ KERNEL_LDT, /* ldt */ 0, /* trace_trap */ 0x0FFF /* IO bitmap offset - beyond end of TSS segment, so no bitmap */ }; /* * Task structure for machine_check handler: */ struct i386_tss master_mctss __attribute__ ((section ("__DESC, master_mctss"))) __attribute__ ((aligned (4096))) = { 0, /* back link */ (int) &mc_task_stack_end - 4, /* esp0 */ KERNEL_DS, /* ss0 */ 0, /* esp1 */ 0, /* ss1 */ 0, /* esp2 */ 0, /* ss2 */ (int) IdlePDPT, /* cr3 */ (int) &mc_task_start, /* eip */ 0, /* eflags */ 0, /* eax */ 0, /* ecx */ 0, /* edx */ 0, /* ebx */ (int) &mc_task_stack_end - 4, /* esp */ 0, /* ebp */ 0, /* esi */ 0, /* edi */ KERNEL_DS, /* es */ KERNEL32_CS, /* cs */ KERNEL_DS, /* ss */ KERNEL_DS, /* ds */ KERNEL_DS, /* fs */ CPU_DATA_GS, /* gs */ KERNEL_LDT, /* ldt */ 0, /* trace_trap */ 0x0FFF /* IO bitmap offset - beyond end of TSS segment, so no bitmap */ }; #endif /* __i386__ */