80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
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/* $NetBSD: tss.h,v 1.10 2008/01/05 21:45:00 yamt Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tss.h 5.4 (Berkeley) 1/18/91
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*/
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#ifndef _I386_TSS_H_
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#define _I386_TSS_H_
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/*
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* Intel 386 Context Data Type
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*/
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struct i386tss {
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int __tss_link;
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int tss_esp0; /* kernel stack pointer at privilege level 0 */
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int tss_ss0; /* kernel stack segment at privilege level 0 */
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int __tss_esp1;
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int __tss_ss1;
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int __tss_esp2;
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int __tss_ss2;
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int tss_cr3; /* page directory paddr */
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int __tss_eip;
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int __tss_eflags;
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int __tss_eax;
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int __tss_ecx;
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int __tss_edx;
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int __tss_ebx;
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int tss_esp; /* saved stack pointer */
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int tss_ebp; /* saved frame pointer */
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int __tss_esi;
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int __tss_edi;
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int __tss_es;
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int __tss_cs;
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int __tss_ss;
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int __tss_ds;
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int tss_fs; /* saved segment register */
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int tss_gs; /* saved segment register */
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int tss_ldt; /* LDT selector */
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int tss_iobase; /* options and I/O permission map offset */
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};
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/*
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* I/O bitmap offset beyond TSS's segment limit means no bitmaps.
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* (i.e. any I/O attempt generates an exception.)
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*/
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#define IOMAP_INVALOFF 0xffff
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#endif /* #ifndef _I386_TSS_H_ */
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