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Annotation of Gnu-Mach/i386/util/cpu.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Copyright (c) 1995-1994 The University of Utah and
        !             3:  * the Computer Systems Laboratory at the University of Utah (CSL).
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * Permission to use, copy, modify and distribute this software is hereby
        !             7:  * granted provided that (1) source code retains these copyright, permission,
        !             8:  * and disclaimer notices, and (2) redistributions including binaries
        !             9:  * reproduce the notices in supporting documentation, and (3) all advertising
        !            10:  * materials mentioning features or use of this software display the following
        !            11:  * acknowledgement: ``This product includes software developed by the
        !            12:  * Computer Systems Laboratory at the University of Utah.''
        !            13:  *
        !            14:  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
        !            15:  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
        !            16:  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            17:  *
        !            18:  * CSL requests users of this software to return to [email protected] any
        !            19:  * improvements that they make and grant CSL redistribution rights.
        !            20:  *
        !            21:  *      Author: Bryan Ford, University of Utah CSL
        !            22:  */
        !            23: #ifndef _I386_UTIL_CPU_H_
        !            24: #define _I386_UTIL_CPU_H_
        !            25: 
        !            26: #include <mach/machine/tss.h>
        !            27: 
        !            28: #include "config.h"
        !            29: #include "gdt.h"
        !            30: #include "ldt.h"
        !            31: #include "idt.h"
        !            32: 
        !            33: /*
        !            34:  * Multiprocessor i386/i486 systems use a separate copy of the
        !            35:  * GDT, IDT, LDT, and kernel TSS per processor.  The first three
        !            36:  * are separate to avoid lock contention: the i386 uses locked
        !            37:  * memory cycles to access the descriptor tables.  The TSS is
        !            38:  * separate since each processor needs its own kernel stack,
        !            39:  * and since using a TSS marks it busy.
        !            40:  */
        !            41: 
        !            42: /* This structure holds the processor tables for this cpu.  */
        !            43: struct cpu_tables
        !            44: {
        !            45:        struct i386_gate        idt[IDTSZ];
        !            46:        struct i386_descriptor  gdt[GDTSZ];
        !            47: #ifdef ENABLE_KERNEL_LDT
        !            48:        struct i386_descriptor  ldt[LDTSZ];
        !            49: #endif
        !            50: #ifdef ENABLE_KERNEL_TSS
        !            51:        struct i386_tss         tss;
        !            52: #endif
        !            53: };
        !            54: 
        !            55: #include_next "cpu.h"
        !            56: 
        !            57: #endif _I386_UTIL_CPU_H_

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