/*      $NetBSD: pcb.h,v 1.61 2025/04/24 09:29:09 kre Exp $     */

/*
 * Copyright (c) 1998, 2009 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum, and by Andrew Doran.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * 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.
 *
 *      @(#)pcb.h       5.10 (Berkeley) 5/12/91
 */

/*
 * Intel 386 process control block
 */

#ifndef _I386_PCB_H_
#define _I386_PCB_H_

#if defined(_KERNEL_OPT)
#include "opt_multiprocessor.h"
#endif

#include <machine/segments.h>
#include <x86/cpu_extended_state.h>

struct pcb {
        int     pcb_esp0;               /* ring0 esp */
        int     pcb_esp;                /* kernel esp */
        int     pcb_ebp;                /* kernel ebp */
        int     pcb_cr0;                /* saved image of CR0 */
        int     pcb_cr2;                /* page fault address (CR2) */
        int     pcb_cr3;                /* page directory pointer */
        int     pcb_iopl;               /* i/o privilege level */

        struct segment_descriptor pcb_fsd;      /* %fs descriptor */
        struct segment_descriptor pcb_gsd;      /* %gs descriptor */
        void    *pcb_onfault;           /* copyin/out fault recovery */
        char    *pcb_iomap;             /* I/O permission bitmap */
        struct dbreg    *pcb_dbregs;    /* CPU Debug Registers */
        uint16_t pcb_fpu_dflt_cw;

#define PCB_DBREGS      0x01
        int     pcb_flags;

        int     not_used[15];

        /* floating point state */
        union savefpu   pcb_savefpu[1] __aligned(64);
#define pcb_savefpusmall        pcb_savefpu
        /* **** DO NOT ADD ANYTHING HERE **** */

};
#ifndef __lint__
#include <sys/stddef.h>         /* for offsetof() */

/* This doesn't really matter, but there is a lot of implied padding */
__CTASSERT(offsetof(struct pcb, pcb_savefpu) == 128);
__CTASSERT(sizeof(struct pcb) - sizeof (union savefpu) == 128);
#endif

#endif /* _I386_PCB_H_ */