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/* $OpenBSD: pcb.h,v 1.18 2015/05/05 02:13:46 guenther Exp $ */
/* $NetBSD: pcb.h,v 1.21 1996/01/08 13:51:42 mycroft Exp $ */
/*-
* Copyright (c) 1995 Charles M. Hannum. All rights reserved.
* 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 _MACHINE_PCB_H_
#define _MACHINE_PCB_H_
#include <sys/signal.h>
#include <machine/segments.h>
#include <machine/tss.h>
#include <machine/npx.h>
#include <machine/sysarch.h>
#define NIOPORTS 1024 /* # of ports we allow to be mapped */
struct pcb {
struct i386tss pcb_tss;
#define pcb_cr3 pcb_tss.tss_cr3
#define pcb_esp pcb_tss.tss_esp
#define pcb_ebp pcb_tss.tss_ebp
#define pcb_cs pcb_tss.tss_cs
#define pcb_ldt_sel pcb_tss.tss_ldt
union descriptor *pcb_ldt; /* per process (user) LDT */
int pcb_ldt_len; /* number of LDT entries */
union savefpu pcb_savefpu; /* floating point state for FPU */
int pcb_cr0; /* saved image of CR0 */
struct segment_descriptor pcb_threadsegs[2];
/* per-thread descriptors */
/*
* Software pcb (extension)
*/
caddr_t pcb_onfault; /* copyin/out fault recovery */
int vm86_eflags; /* virtual eflags for vm86 mode */
int vm86_flagmask; /* flag mask for vm86 mode */
void *vm86_userp; /* XXX performance hack */
struct pmap *pcb_pmap; /* back pointer to our pmap */
struct cpu_info *pcb_fpcpu; /* cpu holding our fpu state */
u_long pcb_iomap[NIOPORTS/32]; /* I/O bitmap */
u_char pcb_iomap_pad; /* required; must be 0xff, says intel */
int pcb_flags;
#define PCB_SAVECTX 0x00000001
};
/* the indexes of the %fs/%gs segments in pcb_threadsegs */
#define TSEG_FS 0
#define TSEG_GS 1
#endif /* _MACHINE_PCB_H_ */
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