projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 43866e37 | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
| 1c79356b | 7 | * |
| 43866e37 A |
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 | |
| 1c79356b A |
17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 43866e37 A |
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. | |
| 1c79356b A |
22 | * |
| 23 | * @APPLE_LICENSE_HEADER_END@ | |
| 24 | */ | |
| 25 | /* | |
| 26 | * Copyright (c) 1992 NeXT Computer, Inc. | |
| 27 | * | |
| 28 | * Intel386 Family: Descriptor tables. | |
| 29 | * | |
| 30 | * HISTORY | |
| 31 | * | |
| 32 | * 30 March 1992 ? at NeXT | |
| 33 | * Created. | |
| 34 | */ | |
| 35 | ||
| 36 | #include <architecture/i386/desc.h> | |
| 37 | #include <architecture/i386/tss.h> | |
| 38 | ||
| 39 | /* | |
| 40 | * A totally generic descriptor | |
| 41 | * table entry. | |
| 42 | */ | |
| 43 | ||
| 44 | typedef union dt_entry { | |
| 45 | code_desc_t code; | |
| 46 | data_desc_t data; | |
| 47 | ldt_desc_t ldt; | |
| 48 | tss_desc_t task_state; | |
| 49 | call_gate_t call_gate; | |
| 50 | trap_gate_t trap_gate; | |
| 51 | intr_gate_t intr_gate; | |
| 52 | task_gate_t task_gate; | |
| 53 | } dt_entry_t; | |
| 54 | ||
| 55 | #define DESC_TBL_MAX 8192 | |
| 56 | ||
| 57 | /* | |
| 58 | * Global descriptor table. | |
| 59 | */ | |
| 60 | ||
| 61 | typedef union gdt_entry { | |
| 62 | code_desc_t code; | |
| 63 | data_desc_t data; | |
| 64 | ldt_desc_t ldt; | |
| 65 | call_gate_t call_gate; | |
| 66 | task_gate_t task_gate; | |
| 67 | tss_desc_t task_state; | |
| 68 | } gdt_entry_t; | |
| 69 | ||
| 70 | typedef gdt_entry_t gdt_t; | |
| 71 | ||
| 72 | /* | |
| 73 | * Interrupt descriptor table. | |
| 74 | */ | |
| 75 | ||
| 76 | typedef union idt_entry { | |
| 77 | trap_gate_t trap_gate; | |
| 78 | intr_gate_t intr_gate; | |
| 79 | task_gate_t task_gate; | |
| 80 | } idt_entry_t; | |
| 81 | ||
| 82 | typedef idt_entry_t idt_t; | |
| 83 | ||
| 84 | /* | |
| 85 | * Local descriptor table. | |
| 86 | */ | |
| 87 | ||
| 88 | typedef union ldt_entry { | |
| 89 | code_desc_t code; | |
| 90 | data_desc_t data; | |
| 91 | call_gate_t call_gate; | |
| 92 | task_gate_t task_gate; | |
| 93 | } ldt_entry_t; | |
| 94 | ||
| 95 | typedef ldt_entry_t ldt_t; |