pcb.h revision 276084 
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 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	from: @(#)pcb.h	5.10 (Berkeley) 5/12/91
33 * $FreeBSD: stable/10/sys/i386/include/pcb.h 276084 2014-12-22 21:32:39Z jhb $
34 */
35
36#ifndef _I386_PCB_H_
37#define _I386_PCB_H_
38
39/*
40 * Intel 386 process control block
41 */
42#ifndef _KERNEL
43#include <machine/segments.h>
44#endif
45#include <machine/npx.h>
46
47struct pcb {
48	int	pcb_edi;
49	int	pcb_esi;
50	int	pcb_ebp;
51	int	pcb_esp;
52	int	pcb_ebx;
53	int	pcb_eip;
54	struct segment_descriptor pcb_fsd;
55	struct segment_descriptor pcb_gsd;
56	int	pcb_ds;
57	int	pcb_es;
58	int	pcb_fs;
59	int	pcb_gs;
60	int	pcb_ss;
61	int	pcb_cr0;
62	int	pcb_cr2;
63	int	pcb_cr3;
64	int	pcb_cr4;
65	int     pcb_dr0;
66	int     pcb_dr1;
67	int     pcb_dr2;
68	int     pcb_dr3;
69	int     pcb_dr6;
70	int     pcb_dr7;
71
72	struct region_descriptor pcb_gdt;
73	struct region_descriptor pcb_idt;
74	uint16_t	pcb_ldt;
75	uint16_t	pcb_tr;
76
77	u_int	pcb_flags;
78#define	PCB_DBREGS	0x02	/* process using debug registers */
79#define	PCB_NPXINITDONE	0x08	/* fpu state is initialized */
80#define	PCB_VM86CALL	0x10	/* in vm86 call */
81#define	PCB_NPXUSERINITDONE 0x20 /* user fpu state is initialized */
82#define	PCB_KERNNPX	0x40	/* kernel uses npx */
83
84	uint16_t pcb_initial_npxcw;
85
86	caddr_t	pcb_onfault;	/* copyin/out fault recovery */
87	struct	pcb_ext	*pcb_ext;	/* optional pcb extension */
88	int	pcb_psl;	/* process status long */
89	u_long	pcb_vm86[2];	/* vm86bios scratch space */
90	union	savefpu *pcb_save;
91
92	uint32_t pcb_pad[10];
93};
94
95/* Per-CPU state saved during suspend and resume. */
96struct susppcb {
97	struct pcb	sp_pcb;
98
99	/* fpu context for suspend/resume */
100	void		*sp_fpususpend;
101};
102
103#ifdef _KERNEL
104struct trapframe;
105
106void	makectx(struct trapframe *, struct pcb *);
107int	savectx(struct pcb *) __returns_twice;
108void	resumectx(struct pcb *) __fastcall;
109#endif
110
111#endif /* _I386_PCB_H_ */
112