/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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.
 */

#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 */
        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 */
        int     tss_eip;        /* program counter */
        int     tss_eflags;     /* program status longword */
        int     tss_eax;
        int     tss_ecx;
        int     tss_edx;
        int     tss_ebx;
        int     tss_esp;        /* user stack pointer */
        int     tss_ebp;        /* user frame pointer */
        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_ */