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pcb.h revision 1.7 
      1 /*-
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * William Jolitz.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	from: @(#)pcb.h	5.10 (Berkeley) 5/12/91
     37  *	$Id: pcb.h,v 1.7 1993/09/16 03:24:45 brezak Exp $
     38  */
     39 
     40 #ifndef _I386_PCB_H_
     41 #define _I386_PCB_H_
     42 
     43 /*
     44  * Intel 386 process control block
     45  */
     46 #include "machine/tss.h"
     47 #include "machine/npx.h"
     48 
     49 struct pcb {
     50 	struct	i386tss pcb_tss;
     51 #define	pcb_ksp	pcb_tss.tss_esp0
     52 #define	pcb_ptd	pcb_tss.tss_cr3
     53 #define	pcb_cr3	pcb_ptd
     54 #define	pcb_pc	pcb_tss.tss_eip
     55 #define	pcb_psl	pcb_tss.tss_eflags
     56 #define	pcb_usp	pcb_tss.tss_esp
     57 #define	pcb_fp	pcb_tss.tss_ebp
     58 #ifdef	notyet
     59 	u_char	pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
     60 #endif
     61 	struct	save87	pcb_savefpu;	/* floating point state for 287/387 */
     62 	struct	emcsts	pcb_saveemc;	/* Cyrix EMC state */
     63 /*
     64  * Software pcb (extension)
     65  */
     66 	int	pcb_flags;
     67 #ifdef notused
     68 #define	FP_WASUSED	0x01	/* process has used fltng pnt hardware */
     69 #define	FP_NEEDSSAVE	0x02	/* ... that needs save on next context switch */
     70 #define	FP_NEEDSRESTORE	0x04	/* ... that needs restore on next DNA fault */
     71 #endif
     72 #define	FP_USESEMC	0x08	/* process uses EMC memory-mapped mode */
     73 #define	FP_SOFTFP	0x20	/* process using software fltng pnt emulator */
     74 	short	pcb_iml;	/* interrupt mask level */
     75 	caddr_t	pcb_onfault;	/* copyin/out fault recovery */
     76 	int	pcb_cmap2;	/* XXX temporary PTE - will prefault instead */
     77 };
     78 
     79 #ifdef KERNEL
     80 struct pcb *curpcb;		/* our current running pcb */
     81 #endif
     82 
     83 #endif /* _I386_PCB_H_ */
     84