xref: /original-bsd/sys/i386/include/pcb.h (revision e8eb2810)
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  *	@(#)pcb.h	5.11 (Berkeley) 10/11/92
37  */
38 
39 /*
40  * Intel 386 process control block
41  */
42 #include <machine/tss.h>
43 #include <machine/npx.h>
44 
45 struct pcb {
46 	struct	i386tss pcb_tss;
47 #define	pcb_ksp	pcb_tss.tss_esp0
48 #define	pcb_ptd	pcb_tss.tss_cr3
49 #define	pcb_cr3	pcb_ptd
50 #define	pcb_pc	pcb_tss.tss_eip
51 #define	pcb_psl	pcb_tss.tss_eflags
52 #define	pcb_usp	pcb_tss.tss_esp
53 #define	pcb_fp	pcb_tss.tss_ebp
54 #ifdef	notyet
55 	u_char	pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
56 #endif
57 	struct	save87	pcb_savefpu;	/* floating point state for 287/387 */
58 	struct	emcsts	pcb_saveemc;	/* Cyrix EMC state */
59 /*
60  * Software pcb (extension)
61  */
62 	int	pcb_flags;
63 #define	FP_WASUSED	0x01	/* floating point has been used in this proc */
64 #define	FP_NEEDSSAVE	0x02	/* needs save on next context switch */
65 #define	FP_NEEDSRESTORE	0x04	/* need restore on next DNA fault */
66 #define	FP_USESEMC	0x08	/* process uses EMC memory-mapped mode */
67 #define	FM_TRAP		0x10	/* process entered kernel on a trap frame */
68 	short	pcb_iml;	/* interrupt mask level */
69 	caddr_t	pcb_onfault;	/* copyin/out fault recovery */
70 	long	pcb_sigc[8];	/* XXX signal code trampoline */
71 	int	pcb_cmap2;	/* XXX temporary PTE - will prefault instead */
72 };
73 
74 /*
75  * The pcb is augmented with machine-dependent additional data for
76  * core dumps. For the i386: ???
77  */
78 struct md_coredump {
79         int     pad;		/* XXX? -- cgd */
80 };
81 
82 #ifdef KERNEL
83 struct pcb *curpcb;		/* our current running pcb */
84 #endif
85