1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1990 by Sun Microsystems, Inc.
24 */
25
26#ifndef _SYS_MACHPCB_H
27#define	_SYS_MACHPCB_H
28
29#pragma ident	"%Z%%M%	%I%	%E% SMI"
30
31#include <sys/stack.h>
32#include <sys/regset.h>
33#include <sys/privregs.h>
34
35#ifdef	__cplusplus
36extern "C" {
37#endif
38
39/*
40 * This file is machine dependent.
41 */
42
43/*
44 * Machine dependent per-thread data.
45 */
46#define	MAXWIN	8	/* max # of windows currently supported */
47
48/*
49 * The system actually supports one more than the above number.
50 * There is always one window reserved for trap handlers that
51 * never has to be saved into the pcb struct.
52 */
53
54/*
55 * Distance from beginning of thread stack (t_stk) to saved regs struct.
56 */
57#define	REGOFF	MINFRAME
58
59#ifndef _ASM
60
61/*
62 * The struct machpcb is always allocated stack aligned.
63 */
64typedef struct machpcb {
65	char	mpcb_frame[REGOFF];
66	struct	regs mpcb_regs;	/* user's saved registers */
67	struct	rwindow mpcb_wbuf[MAXWIN]; /* user window save buffer */
68	caddr_t	mpcb_spbuf[MAXWIN]; /* sp's for each wbuf */
69	struct	rwindow mpcb_rwin[2]; /* windows used while doing watchpoints */
70	caddr_t	mpcb_rsp[2];	/* sp's for pcb_rwin[]  */
71	int	mpcb_uwm;	/* user window mask */
72	int	mpcb_swm;	/* shared user/kernel window mask */
73	int	mpcb_wbcnt;	/* number of saved windows in pcb_wbuf */
74	struct	fpu mpcb_fpu;	/* fpu state */
75	struct	fq mpcb_fpu_q[MAXFPQ]; /* fpu exception queue */
76	int	mpcb_flags;	/* various state flags */
77	int	mpcb_wocnt;	/* window overflow count */
78	int	mpcb_wucnt;	/* window underflow count */
79	kthread_t *mpcb_thread;	/* associated thread */
80} machpcb_t;
81#endif /* ! _ASM */
82
83/* mpcb_flags */
84#define	CLEAN_WINDOWS	0x01	/* keep user regs clean */
85#define	FP_TRAPPED	0x02	/* fp_traps call caused by fp queue */
86#define	GOTO_SYS_RTT	0x04	/* return from syscall via sys_rtt */
87
88
89/*
90 * We can use lwp_regs to find the mpcb base.
91 */
92#ifndef _ASM
93#define	lwptompcb(lwp)	((struct machpcb *) \
94	    ((caddr_t)(lwp)->lwp_regs - REGOFF))
95#endif
96
97#ifdef	__cplusplus
98}
99#endif
100
101#endif	/* _SYS_MACHPCB_H */
102