LCOM1920-T02G10

/*        $NetBSD: tss.h,v 1.10 2008/01/05 21:45:00 yamt Exp $        */

/*-

 * Copyright (c) 1990 The Regents of the University of California.

 * All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * William Jolitz.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *        @(#)tss.h        5.4 (Berkeley) 1/18/91

 */

#ifndef _I386_TSS_H_

#define _I386_TSS_H_

/*

 * Intel 386 Context Data Type

 */

struct i386tss {

        int        __tss_link;

        int        tss_esp0;         /* kernel stack pointer at privilege level 0 */

        int        tss_ss0;        /* kernel stack segment at privilege level 0 */

        int        __tss_esp1;

        int        __tss_ss1;

        int        __tss_esp2;

        int        __tss_ss2;

        int        tss_cr3;        /* page directory paddr */

        int        __tss_eip;

        int        __tss_eflags;

        int        __tss_eax; 

        int        __tss_ecx; 

        int        __tss_edx; 

        int        __tss_ebx; 

        int        tss_esp;        /* saved stack pointer */

        int        tss_ebp;        /* saved frame pointer */

        int        __tss_esi; 

        int        __tss_edi; 

        int        __tss_es;

        int        __tss_cs;

        int        __tss_ss;

        int        __tss_ds;

        int        tss_fs;                /* saved segment register */

        int        tss_gs;                /* saved segment register */

        int        tss_ldt;        /* LDT selector */

        int        tss_iobase;        /* options and I/O permission map offset */

};

/*

 * I/O bitmap offset beyond TSS's segment limit means no bitmaps.

 * (i.e. any I/O attempt generates an exception.)

 */

#define        IOMAP_INVALOFF        0xffff

#endif /* #ifndef _I386_TSS_H_ */