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 | * | |
| de355530 A |
6 | * The contents of this file constitute Original Code as defined in and |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| 1c79356b | 11 | * |
| de355530 A |
12 | * This Original Code and all software distributed under the License are |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| de355530 A |
16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 1c79356b A |
19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * Copyright (c) 1992 NeXT Computer, Inc. | |
| 24 | * | |
| 25 | * Intel386 Family: Descriptor tables. | |
| 26 | * | |
| 27 | * HISTORY | |
| 28 | * | |
| 29 | * 30 March 1992 ? at NeXT | |
| 30 | * Created. | |
| 31 | */ | |
| 32 | ||
| 33 | #include <architecture/i386/desc.h> | |
| 34 | #include <architecture/i386/tss.h> | |
| 35 | ||
| 36 | /* | |
| 37 | * A totally generic descriptor | |
| 38 | * table entry. | |
| 39 | */ | |
| 40 | ||
| 41 | typedef union dt_entry { | |
| 42 | code_desc_t code; | |
| 43 | data_desc_t data; | |
| 44 | ldt_desc_t ldt; | |
| 45 | tss_desc_t task_state; | |
| 46 | call_gate_t call_gate; | |
| 47 | trap_gate_t trap_gate; | |
| 48 | intr_gate_t intr_gate; | |
| 49 | task_gate_t task_gate; | |
| 50 | } dt_entry_t; | |
| 51 | ||
| 52 | #define DESC_TBL_MAX 8192 | |
| 53 | ||
| 54 | /* | |
| 55 | * Global descriptor table. | |
| 56 | */ | |
| 57 | ||
| 58 | typedef union gdt_entry { | |
| 59 | code_desc_t code; | |
| 60 | data_desc_t data; | |
| 61 | ldt_desc_t ldt; | |
| 62 | call_gate_t call_gate; | |
| 63 | task_gate_t task_gate; | |
| 64 | tss_desc_t task_state; | |
| 65 | } gdt_entry_t; | |
| 66 | ||
| 67 | typedef gdt_entry_t gdt_t; | |
| 68 | ||
| 69 | /* | |
| 70 | * Interrupt descriptor table. | |
| 71 | */ | |
| 72 | ||
| 73 | typedef union idt_entry { | |
| 74 | trap_gate_t trap_gate; | |
| 75 | intr_gate_t intr_gate; | |
| 76 | task_gate_t task_gate; | |
| 77 | } idt_entry_t; | |
| 78 | ||
| 79 | typedef idt_entry_t idt_t; | |
| 80 | ||
| 81 | /* | |
| 82 | * Local descriptor table. | |
| 83 | */ | |
| 84 | ||
| 85 | typedef union ldt_entry { | |
| 86 | code_desc_t code; | |
| 87 | data_desc_t data; | |
| 88 | call_gate_t call_gate; | |
| 89 | task_gate_t task_gate; | |
| 90 | } ldt_entry_t; | |
| 91 | ||
| 92 | typedef ldt_entry_t ldt_t; |