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Annotation of XNU/EXTERNAL_HEADERS/architecture/i386/table.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             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.
        !            11:  * 
        !            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
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            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.
        !            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: #import <architecture/i386/desc.h>
        !            34: #import <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;

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