/*      $NetBSD: pcb.h,v 1.35 2025/04/28 13:01:27 riastradh Exp $       */

/*
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * 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
 */

/*
 * XXXfvdl these copyrights don't really match anymore
 */

#ifndef _AMD64_PCB_H_
#define _AMD64_PCB_H_

#ifdef __x86_64__

#include <x86/cpu_extended_state.h>
#include <amd64/reg.h>

#define NIOPORTS        1024            /* # of ports we allow to be mapped */

/*
 * IMPORTANT NOTE: this structure, including the variable-sized FPU state at
 * the end, must fit within one page.
 */
struct pcb {
        int       pcb_flags;
#define PCB_COMPAT32    0x01
#define PCB_DBREGS      0x02
        u_int     pcb_cr0;              /* saved image of CR0 */
        uint64_t pcb_rsp0;
        uint64_t pcb_cr2;               /* page fault address (CR2) */
        uint64_t pcb_cr3;
        uint64_t pcb_rsp;
        uint64_t pcb_rbp;
        void     *pcb_onfault;          /* copyin/out fault recovery */
        uint64_t  pcb_fs;
        uint64_t  pcb_gs;
        struct dbreg *pcb_dbregs;
        uint16_t pcb_fpu_dflt_cw;
        int pcb_iopl;
#ifdef XENPV                    /* XXX XENPV PR kern/59371 */
        uint32_t pcb_unused[8];         /* unused */
        union savefpu   pcb_savefpu[1] __aligned(64);
#define pcb_savefpusmall        pcb_savefpu
#else
        union savefpu *pcb_savefpu;

        uint32_t pcb_unused[6];         /* unused */

        /* fpu state, if it fits; otherwise allocated separately */
        union savefpu   pcb_savefpusmall __aligned(64);
#endif
        /* **** DO NOT ADD ANYTHING HERE **** */
};
#ifndef __lint__
#include <sys/stddef.h>         /* for offsetof() */

__CTASSERT(offsetof(struct pcb, pcb_savefpusmall) == 128);
__CTASSERT(sizeof(struct pcb) - sizeof (union savefpu) ==  128);
#endif

#else   /*      __x86_64__      */

#include <i386/pcb.h>

#endif  /*      __x86_64__      */

#endif /* _AMD64_PCB_H_ */