projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 2d21ac55 | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| 1c79356b | 5 | * |
| 2d21ac55 A |
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. | |
| 8f6c56a5 | 14 | * |
| 2d21ac55 A |
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 | |
| 8f6c56a5 A |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 2d21ac55 A |
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. | |
| 8f6c56a5 | 25 | * |
| 2d21ac55 | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| 1c79356b A |
27 | */ |
| 28 | /* | |
| 29 | * Copyright (c) 1992 NeXT Computer, Inc. | |
| 30 | * | |
| 31 | * Intel386 Family: Descriptor tables. | |
| 32 | * | |
| 33 | * HISTORY | |
| 34 | * | |
| 35 | * 30 March 1992 ? at NeXT | |
| 36 | * Created. | |
| 37 | */ | |
| 38 | ||
| 39 | #include <architecture/i386/desc.h> | |
| 40 | #include <architecture/i386/tss.h> | |
| 41 | ||
| 42 | /* | |
| 43 | * A totally generic descriptor | |
| 44 | * table entry. | |
| 45 | */ | |
| 46 | ||
| 47 | typedef union dt_entry { | |
| 48 | code_desc_t code; | |
| 49 | data_desc_t data; | |
| 50 | ldt_desc_t ldt; | |
| 51 | tss_desc_t task_state; | |
| 52 | call_gate_t call_gate; | |
| 53 | trap_gate_t trap_gate; | |
| 54 | intr_gate_t intr_gate; | |
| 55 | task_gate_t task_gate; | |
| 56 | } dt_entry_t; | |
| 57 | ||
| 58 | #define DESC_TBL_MAX 8192 | |
| 59 | ||
| 60 | /* | |
| 61 | * Global descriptor table. | |
| 62 | */ | |
| 63 | ||
| 64 | typedef union gdt_entry { | |
| 65 | code_desc_t code; | |
| 66 | data_desc_t data; | |
| 67 | ldt_desc_t ldt; | |
| 68 | call_gate_t call_gate; | |
| 69 | task_gate_t task_gate; | |
| 70 | tss_desc_t task_state; | |
| 71 | } gdt_entry_t; | |
| 72 | ||
| 73 | typedef gdt_entry_t gdt_t; | |
| 74 | ||
| 75 | /* | |
| 76 | * Interrupt descriptor table. | |
| 77 | */ | |
| 78 | ||
| 79 | typedef union idt_entry { | |
| 80 | trap_gate_t trap_gate; | |
| 81 | intr_gate_t intr_gate; | |
| 82 | task_gate_t task_gate; | |
| 83 | } idt_entry_t; | |
| 84 | ||
| 85 | typedef idt_entry_t idt_t; | |
| 86 | ||
| 87 | /* | |
| 88 | * Local descriptor table. | |
| 89 | */ | |
| 90 | ||
| 91 | typedef union ldt_entry { | |
| 92 | code_desc_t code; | |
| 93 | data_desc_t data; | |
| 94 | call_gate_t call_gate; | |
| 95 | task_gate_t task_gate; | |
| 96 | } ldt_entry_t; | |
| 97 | ||
| 98 | typedef ldt_entry_t ldt_t; |