/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This 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 OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1992 NeXT Computer, Inc. * * Intel386 Family: Descriptor tables. * * HISTORY * * 30 March 1992 ? at NeXT * Created. */ #include <architecture/i386/desc.h> #include <architecture/i386/tss.h> /* * A totally generic descriptor * table entry. */ typedef union dt_entry { code_desc_t code; data_desc_t data; ldt_desc_t ldt; tss_desc_t task_state; call_gate_t call_gate; trap_gate_t trap_gate; intr_gate_t intr_gate; task_gate_t task_gate; } dt_entry_t; #define DESC_TBL_MAX 8192 /* * Global descriptor table. */ typedef union gdt_entry { code_desc_t code; data_desc_t data; ldt_desc_t ldt; call_gate_t call_gate; task_gate_t task_gate; tss_desc_t task_state; } gdt_entry_t; typedef gdt_entry_t gdt_t; /* * Interrupt descriptor table. */ typedef union idt_entry { trap_gate_t trap_gate; intr_gate_t intr_gate; task_gate_t task_gate; } idt_entry_t; typedef idt_entry_t idt_t; /* * Local descriptor table. */ typedef union ldt_entry { code_desc_t code; data_desc_t data; call_gate_t call_gate; task_gate_t task_gate; } ldt_entry_t; typedef ldt_entry_t ldt_t;