1/*	$OpenBSD: pcb.h,v 1.3 1998/09/15 10:50:12 pefo Exp $	*/
2
3/*-
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department and Ralph Campbell.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
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: Utah Hdr: pcb.h 1.13 89/04/23
37 *	from: @(#)pcb.h 8.1 (Berkeley) 6/10/93
38 *	JNPR: pcb.h,v 1.2 2006/08/07 11:51:17 katta
39 * $FreeBSD$
40 */
41
42#ifndef _MACHINE_PCB_H_
43#define	_MACHINE_PCB_H_
44
45/*
46 * used by switch.S
47 */
48#define	PCB_REG_S0	0
49#define	PCB_REG_S1	1
50#define	PCB_REG_S2	2
51#define	PCB_REG_S3	3
52#define	PCB_REG_S4	4
53#define	PCB_REG_S5	5
54#define	PCB_REG_S6	6
55#define	PCB_REG_S7	7
56#define	PCB_REG_SP	8
57#define	PCB_REG_S8	9
58#define	PCB_REG_RA	10
59#define	PCB_REG_SR	11
60#define	PCB_REG_GP	12
61#define	PCB_REG_PC	13
62
63#ifndef LOCORE
64#include <machine/frame.h>
65
66/*
67 * MIPS process control block
68 */
69struct pcb
70{
71	struct trapframe pcb_regs;	/* saved CPU and registers */
72	__register_t pcb_context[14];	/* kernel context for resume */
73	void *pcb_onfault;		/* for copyin/copyout faults */
74	register_t pcb_tpc;
75};
76
77#ifdef _KERNEL
78extern struct pcb *curpcb;		/* the current running pcb */
79
80void makectx(struct trapframe *, struct pcb *);
81int savectx(struct pcb *) __returns_twice;
82#endif
83#endif
84
85#endif	/* !_MACHINE_PCB_H_ */
86