i386/include/pcb.h

/*-
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 *	from: @(#)pcb.h	5.10 (Berkeley) 5/12/91
 *	pcb.h,v 1.6 1993/06/27 04:50:12 andrew Exp
 */

#ifndef _I386_PCB_H_
#define _I386_PCB_H_

/*
 * Intel 386 process control block
 */
#include "machine/tss.h"
#include "machine/npx.h"

struct pcb {
	struct	i386tss pcb_tss;
#define	pcb_ksp	pcb_tss.tss_esp0
#define	pcb_ptd	pcb_tss.tss_cr3
#define	pcb_cr3	pcb_ptd
#define	pcb_pc	pcb_tss.tss_eip
#define	pcb_psl	pcb_tss.tss_eflags
#define	pcb_usp	pcb_tss.tss_esp
#define	pcb_fp	pcb_tss.tss_ebp
#ifdef	notyet
	u_char	pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
#endif
        caddr_t	pcb_ldt;		/* per process (user) LDT */
        int	pcb_ldt_len;		/*      number of LDT entries */
	struct	save87	pcb_savefpu;	/* floating point state for 287/387 */
	struct	emcsts	pcb_saveemc;	/* Cyrix EMC state */
/*
 * Software pcb (extension)
 */
	int	pcb_flags;
#ifdef notused
#define	FP_WASUSED	0x01	/* process has used fltng pnt hardware */
#define	FP_NEEDSSAVE	0x02	/* ... that needs save on next context switch */
#define	FP_NEEDSRESTORE	0x04	/* ... that needs restore on next DNA fault */
#endif
#define	FP_USESEMC	0x08	/* process uses EMC memory-mapped mode */
#define	FP_SOFTFP	0x20	/* process using software fltng pnt emulator */
	short	pcb_iml;	/* interrupt mask level */
	caddr_t	pcb_onfault;	/* copyin/out fault recovery */
	int	pcb_cmap2;	/* XXX temporary PTE - will prefault instead */
};

#ifdef KERNEL
struct pcb *curpcb;		/* our current running pcb */
#endif

#endif /* _I386_PCB_H_ */