| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
| | 7 | * |
| | 8 | * This file contains Original Code and/or Modifications of Original Code |
| | 9 | * as defined in and that are subject to the Apple Public Source License |
| | 10 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 11 | * compliance with the License. Please obtain a copy of the License at |
| | 12 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 13 | * file. |
| | 14 | * |
| | 15 | * The Original Code and all software distributed under the License are |
| | 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 20 | * Please see the License for the specific language governing rights and |
| | 21 | * limitations under the License. |
| | 22 | * |
| | 23 | * @APPLE_LICENSE_HEADER_END@ |
| | 24 | */ |
| | 25 | /* |
| | 26 | * @OSF_COPYRIGHT@ |
| | 27 | */ |
| | 28 | /* |
| | 29 | * Mach Operating System |
| | 30 | * Copyright (c) 1991,1990,1989 Carnegie Mellon University |
| | 31 | * All Rights Reserved. |
| | 32 | * |
| | 33 | * Permission to use, copy, modify and distribute this software and its |
| | 34 | * documentation is hereby granted, provided that both the copyright |
| | 35 | * notice and this permission notice appear in all copies of the |
| | 36 | * software, derivative works or modified versions, and any portions |
| | 37 | * thereof, and that both notices appear in supporting documentation. |
| | 38 | * |
| | 39 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| | 40 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
| | 41 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
| | 42 | * |
| | 43 | * Carnegie Mellon requests users of this software to return to |
| | 44 | * |
| | 45 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
| | 46 | * School of Computer Science |
| | 47 | * Carnegie Mellon University |
| | 48 | * Pittsburgh PA 15213-3890 |
| | 49 | * |
| | 50 | * any improvements or extensions that they make and grant Carnegie Mellon |
| | 51 | * the rights to redistribute these changes. |
| | 52 | */ |
| | 53 | /* |
| | 54 | */ |
| | 55 | |
| | 56 | /* |
| | 57 | * File: machine/thread.h |
| | 58 | * |
| | 59 | * This file contains the structure definitions for the thread |
| | 60 | * state as applied to I386 processors. |
| | 61 | */ |
| | 62 | |
| | 63 | #ifndef _I386_THREAD_H_ |
| | 64 | #define _I386_THREAD_H_ |
| | 65 | |
| | 66 | #include <mach/boolean.h> |
| | 67 | #include <mach/i386/vm_types.h> |
| | 68 | #include <mach/i386/fp_reg.h> |
| | 69 | |
| | 70 | #include <kern/lock.h> |
| | 71 | |
| | 72 | #include <i386/iopb.h> |
| | 73 | #include <i386/seg.h> |
| | 74 | #include <i386/tss.h> |
| | 75 | #include <i386/eflags.h> |
| | 76 | #include <i386/thread_act.h> |
| | 77 | |
| | 78 | /* |
| | 79 | * i386_exception_link: |
| | 80 | * |
| | 81 | * This structure lives at the high end of the kernel stack. |
| | 82 | * It points to the current thread`s user registers. |
| | 83 | */ |
| | 84 | struct i386_exception_link { |
| | 85 | struct i386_saved_state *saved_state; |
| | 86 | }; |
| | 87 | |
| | 88 | |
| | 89 | /* |
| | 90 | * On the kernel stack is: |
| | 91 | * stack: ... |
| | 92 | * struct i386_exception_link |
| | 93 | * struct i386_kernel_state |
| | 94 | * stack+KERNEL_STACK_SIZE |
| | 95 | */ |
| | 96 | |
| | 97 | #define STACK_IKS(stack) \ |
| | 98 | ((struct i386_kernel_state *)((stack) + KERNEL_STACK_SIZE) - 1) |
| | 99 | #define STACK_IEL(stack) \ |
| | 100 | ((struct i386_exception_link *)STACK_IKS(stack) - 1) |
| | 101 | |
| | 102 | #if NCPUS > 1 |
| | 103 | #include <i386/mp_desc.h> |
| | 104 | #endif |
| | 105 | |
| | 106 | /* |
| | 107 | * Boot-time data for master (or only) CPU |
| | 108 | */ |
| | 109 | extern struct fake_descriptor idt[IDTSZ]; |
| | 110 | extern struct fake_descriptor gdt[GDTSZ]; |
| | 111 | extern struct fake_descriptor ldt[LDTSZ]; |
| | 112 | extern struct i386_tss ktss; |
| | 113 | #if MACH_KDB |
| | 114 | extern char db_stack_store[]; |
| | 115 | extern char db_task_stack_store[]; |
| | 116 | extern struct i386_tss dbtss; |
| | 117 | extern void db_task_start(void); |
| | 118 | #endif /* MACH_KDB */ |
| | 119 | #if NCPUS > 1 |
| | 120 | #define curr_gdt(mycpu) (mp_gdt[mycpu]) |
| | 121 | #define curr_ktss(mycpu) (mp_ktss[mycpu]) |
| | 122 | #else |
| | 123 | #define curr_gdt(mycpu) (gdt) |
| | 124 | #define curr_ktss(mycpu) (&ktss) |
| | 125 | #endif |
| | 126 | |
| | 127 | #define gdt_desc_p(mycpu,sel) \ |
| | 128 | ((struct real_descriptor *)&curr_gdt(mycpu)[sel_idx(sel)]) |
| | 129 | |
| | 130 | /* |
| | 131 | * Return address of the function that called current function, given |
| | 132 | * address of the first parameter of current function. |
| | 133 | */ |
| | 134 | #define GET_RETURN_PC(addr) (*((vm_offset_t *)addr - 1)) |
| | 135 | |
| | 136 | /* |
| | 137 | * Defining this indicates that MD code will supply an exception() |
| | 138 | * routine, conformant with kern/exception.c (dependency alert!) |
| | 139 | * but which does wonderfully fast, machine-dependent magic. |
| | 140 | */ |
| | 141 | #define MACHINE_FAST_EXCEPTION 1 |
| | 142 | |
| | 143 | /* |
| | 144 | * MD Macro to fill up global stack state, |
| | 145 | * keeping the MD structure sizes + games private |
| | 146 | */ |
| | 147 | #define MACHINE_STACK_STASH(stack) \ |
| | 148 | MACRO_BEGIN \ |
| | 149 | mp_disable_preemption(); \ |
| | 150 | kernel_stack[cpu_number()] = (stack) + \ |
| | 151 | (KERNEL_STACK_SIZE - sizeof (struct i386_exception_link) \ |
| | 152 | - sizeof (struct i386_kernel_state)), \ |
| | 153 | active_stacks[cpu_number()] = (stack); \ |
| | 154 | mp_enable_preemption(); \ |
| | 155 | MACRO_END |
| | 156 | |
| | 157 | #endif /* _I386_THREAD_H_ */ |
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