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pcb.h revision 1.18 
      1 /*	$NetBSD: pcb.h,v 1.18 1995/05/03 00:08:19 mycroft Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
      5  * Copyright (c) 1990 The Regents of the University of California.
      6  * All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * William Jolitz.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  *
     39  *	@(#)pcb.h	5.10 (Berkeley) 5/12/91
     40  */
     41 
     42 /*
     43  * Intel 386 process control block
     44  */
     45 
     46 #ifndef _I386_PCB_H_
     47 #define _I386_PCB_H_
     48 
     49 #include <machine/segments.h>
     50 #include <machine/tss.h>
     51 #include <machine/npx.h>
     52 
     53 struct pcb {
     54 	struct	i386tss pcb_tss;
     55 #define	pcb_cr3	pcb_tss.tss_cr3
     56 #define	pcb_esp	pcb_tss.tss_esp
     57 #define	pcb_ebp	pcb_tss.tss_ebp
     58 #define	pcb_fs	pcb_tss.tss_fs
     59 #define	pcb_gs	pcb_tss.tss_gs
     60 #ifdef	notyet
     61 	u_char	pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
     62 #endif
     63 	int	pcb_cr0;		/* saved image of CR0 */
     64         caddr_t	pcb_ldt;		/* per process (user) LDT */
     65         int	pcb_ldt_len;		/*      number of LDT entries */
     66 	struct	segment_descriptor pcb_ldt_desc;
     67 	struct	save87	pcb_savefpu;	/* floating point state for 287/387 */
     68 	struct	emcsts	pcb_saveemc;	/* Cyrix EMC state */
     69 /*
     70  * Software pcb (extension)
     71  */
     72 	int	pcb_flags;
     73 #define	PCB_USEDFPU	0x01	/* process has used the FPU */
     74 #define	FP_USESEMC	0x08	/* process uses EMC memory-mapped mode */
     75 	caddr_t	pcb_onfault;	/* copyin/out fault recovery */
     76 };
     77 
     78 /*
     79  * The pcb is augmented with machine-dependent additional data for
     80  * core dumps. For the i386, there is nothing to add.
     81  */
     82 struct md_coredump {
     83 	long	md_pad[8];
     84 };
     85 
     86 #ifdef _KERNEL
     87 struct pcb *curpcb;		/* our current running pcb */
     88 #endif
     89 
     90 #endif /* _I386_PCB_H_ */
     91