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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* from: @(#)tss.h 5.4 (Berkeley) 1/18/91
* $Id: tss.h,v 1.5 1995/05/30 08:00:57 rgrimes Exp $
*/
#ifndef _MACHINE_TSS_H_
#define _MACHINE_TSS_H_ 1
/*
* Intel 386 Context Data Type
*/
struct i386tss {
int tss_link; /* actually 16 bits: top 16 bits must be zero */
int tss_esp0; /* kernel stack pointer privilege level 0 */
#define tss_ksp tss_esp0
int tss_ss0; /* actually 16 bits: top 16 bits must be zero */
int tss_esp1; /* kernel stack pointer privilege level 1 */
int tss_ss1; /* actually 16 bits: top 16 bits must be zero */
int tss_esp2; /* kernel stack pointer privilege level 2 */
int tss_ss2; /* actually 16 bits: top 16 bits must be zero */
int tss_cr3; /* page table directory */
#define tss_ptd tss_cr3
int tss_eip; /* program counter */
#define tss_pc tss_eip
int tss_eflags; /* program status longword */
#define tss_psl tss_eflags
int tss_eax;
int tss_ecx;
int tss_edx;
int tss_ebx;
int tss_esp; /* user stack pointer */
#define tss_usp tss_esp
int tss_ebp; /* user frame pointer */
#define tss_fp tss_ebp
int tss_esi;
int tss_edi;
int tss_es; /* actually 16 bits: top 16 bits must be zero */
int tss_cs; /* actually 16 bits: top 16 bits must be zero */
int tss_ss; /* actually 16 bits: top 16 bits must be zero */
int tss_ds; /* actually 16 bits: top 16 bits must be zero */
int tss_fs; /* actually 16 bits: top 16 bits must be zero */
int tss_gs; /* actually 16 bits: top 16 bits must be zero */
int tss_ldt; /* actually 16 bits: top 16 bits must be zero */
int tss_ioopt; /* options & io offset bitmap: currently zero */
/* XXX unimplemented .. i/o permission bitmap */
};
#endif /* _MACHINE_TSS_H_ */
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