frame.h revision 68549 
1/* $FreeBSD: head/sys/powerpc/include/frame.h 68549 2000-11-10 08:06:50Z benno $ */
2/* $NetBSD: frame.h,v 1.2 1999/01/10 10:13:15 tsubai Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
6 * Copyright (C) 1995, 1996 TooLs GmbH.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by TooLs GmbH.
20 * 4. The name of TooLs GmbH may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34#ifndef	_MACHINE_FRAME_H_
35#define	_MACHINE_FRAME_H_
36
37#include <machine/types.h>
38
39/*
40 * We have to save all registers on every trap, because
41 *	1. user could attach this process every time
42 *	2. we must be able to restore all user registers in case of fork
43 * Actually, we do not save the fp registers on trap, since
44 * these are not used by the kernel. They are saved only when switching
45 * between processes using the FPU.
46 *
47 * Change ordering to cluster together these register_t's.		XXX
48 */
49struct trapframe {
50	register_t fixreg[32];
51	register_t lr;
52	int cr;
53	int xer;
54	register_t ctr;
55	register_t srr0;
56	register_t srr1;
57	register_t dar;			/* dar & dsisr are only filled on a DSI trap */
58	int dsisr;
59	int exc;
60};
61/*
62 * This is to ensure alignment of the stackpointer
63 */
64#define	FRAMELEN	roundup(sizeof(struct trapframe) + 8, 16)
65#define	trapframe(p)	((struct trapframe *)((char *)(p)->p_addr + USPACE - FRAMELEN + 8))
66
67struct switchframe {
68	register_t sp;
69	int fill;
70	int user_sr;
71	int cr;
72	register_t fixreg2;
73	register_t fixreg[19];		/* R13-R31 */
74};
75
76struct clockframe {
77	register_t srr1;
78	register_t srr0;
79	int pri;
80	int depth;
81};
82
83/*
84 * Call frame for PowerPC used during fork.
85 */
86struct callframe {
87	register_t sp;
88	register_t lr;
89	register_t r30;
90	register_t r31;
91};
92
93#endif	/* _MACHINE_FRAME_H_ */
94