/* $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_ */
