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Annotation of XNU/EXTERNAL_HEADERS/architecture/i386/table.h, revision 1.1.1.1

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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