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 * $FreeBSD$
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
47/*
48 * NB: The fields marked with (*) are used by kernel debuggers.  Their
49 * ABI should be preserved.
50 */
51struct pcb {
52	int	pcb_edi;	/* (*) */
53	int	pcb_esi;	/* (*) */
54	int	pcb_ebp;	/* (*) */
55	int	pcb_esp;	/* (*) */
56	int	pcb_ebx;	/* (*) */
57	int	pcb_eip;	/* (*) */
58	struct segment_descriptor pcb_fsd;
59	struct segment_descriptor pcb_gsd;
60	int	pcb_ds;
61	int	pcb_es;
62	int	pcb_fs;
63	int	pcb_gs;
64	int	pcb_ss;
65	int	pcb_cr0;
66	int	pcb_cr2;
67	int	pcb_cr3;
68	int	pcb_cr4;
69	int     pcb_dr0;
70	int     pcb_dr1;
71	int     pcb_dr2;
72	int     pcb_dr3;
73	int     pcb_dr6;
74	int     pcb_dr7;
75
76	struct region_descriptor pcb_gdt;
77	struct region_descriptor pcb_idt;
78	uint16_t	pcb_ldt;
79	uint16_t	pcb_tr;
80
81	u_int	pcb_flags;
82#define	PCB_DBREGS	0x02	/* process using debug registers */
83#define	PCB_NPXINITDONE	0x08	/* fpu state is initialized */
84#define	PCB_VM86CALL	0x10	/* in vm86 call */
85#define	PCB_NPXUSERINITDONE 0x20 /* user fpu state is initialized */
86#define	PCB_KERNNPX	0x40	/* kernel uses npx */
87
88	uint16_t pcb_initial_npxcw;
89
90	caddr_t	pcb_onfault;	/* copyin/out fault recovery */
91	struct	pcb_ext	*pcb_ext;	/* optional pcb extension */
92	int	pcb_psl;	/* process status long */
93	u_long	pcb_vm86[2];	/* vm86bios scratch space */
94	union	savefpu *pcb_save;
95
96	uint32_t pcb_pad[10];
97};
98
99/* Per-CPU state saved during suspend and resume. */
100struct susppcb {
101	struct pcb	sp_pcb;
102
103	/* fpu context for suspend/resume */
104	void		*sp_fpususpend;
105};
106
107#ifdef _KERNEL
108struct trapframe;
109
110void	makectx(struct trapframe *, struct pcb *);
111int	savectx(struct pcb *) __returns_twice;
112void	resumectx(struct pcb *) __fastcall;
113#endif
114
115#endif /* _I386_PCB_H_ */
116