frame.h revision 103614 
1/*
2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 *	$NetBSD: frame.h,v 1.2 1999/01/10 10:13:15 tsubai Exp $
32 * $FreeBSD: head/sys/powerpc/include/frame.h 103614 2002-09-19 04:45:32Z grehan $
33 */
34
35#ifndef	_MACHINE_FRAME_H_
36#define	_MACHINE_FRAME_H_
37
38#include <sys/types.h>
39
40/*
41 * We have to save all registers on every trap, because
42 *	1. user could attach this process every time
43 *	2. we must be able to restore all user registers in case of fork
44 * Actually, we do not save the fp registers on trap, since
45 * these are not used by the kernel. They are saved only when switching
46 * between processes using the FPU.
47 *
48 * Change ordering to cluster together these register_t's.		XXX
49 */
50struct trapframe {
51	register_t fixreg[32];
52	register_t lr;
53	int cr;
54	int xer;
55	register_t ctr;
56	register_t srr0;
57	register_t srr1;
58	register_t dar;		/* dar & dsisr are only filled on a DSI trap */
59	int dsisr;
60	int exc;
61};
62/*
63 * This is to ensure alignment of the stackpointer
64 */
65#define	FRAMELEN	roundup(sizeof(struct trapframe) + 8, 16)
66#define	trapframe(td)	((td)->td_frame)
67
68struct switchframe {
69	register_t sp;
70	register_t fill;
71	register_t user_sr;
72	register_t cr;
73	register_t fixreg2;
74	register_t fixreg[19];		/* R13-R31 */
75};
76
77struct clockframe {
78	register_t srr1;
79	register_t srr0;
80	int pri;
81	int depth;
82};
83
84/*
85 * Call frame for PowerPC used during fork.
86 */
87struct callframe {
88	register_t	cf_func;
89	register_t	cf_arg0;
90	register_t	cf_arg1;
91};
92
93#define	IFRAMELEN	sizeof(struct intrframe)
94struct intrframe {
95	register_t r1;			/*  0 */
96	register_t _pad4;		/*  4 */
97	/*
98	 * The next 4 fields are "clockframe"
99	 */
100	register_t srr1;		/*  8 */
101	register_t srr0;		/* 12 */
102	int pri;			/* 16 */
103	int intr_depth;			/* 20 */
104	register_t vrsave;		/* 24 */
105	register_t ctr;			/* 28 */
106	register_t xer;			/* 32 */
107	register_t cr;			/* 36 */
108	register_t lr;			/* 40 */
109	register_t r12;			/* 44 */
110	register_t r11;			/* 48 */
111	register_t r10;			/* 52 */
112	register_t r9;			/* 56 */
113	register_t r8;			/* 60 */
114	register_t r7;			/* 64 */
115	register_t r6;			/* 68 */
116	register_t r5;			/* 72 */
117	register_t r4;			/* 76 */
118	register_t r3;			/* 80 */
119	register_t r0;			/* 84 */
120};
121
122#define	SPFRAMELEN	sizeof(struct spillframe)
123struct spillframe {
124	register_t	r1;		/*  0 */
125	register_t	_pad4;		/*  4 */
126	register_t	r12;		/*  8 */
127	register_t	r11;		/* 12 */
128	register_t	r10;		/* 16 */
129	register_t	r9;		/* 20 */
130	register_t	r8;		/* 24 */
131	register_t	r7;		/* 28 */
132	register_t	r6;		/* 32 */
133	register_t	r5;		/* 36 */
134	register_t	r4;		/* 40 */
135	register_t	r3;		/* 44 */
136	register_t	r0;		/* 48 */
137};
138
139/* Definitions for syscalls */
140#define	FIRSTARG	3				/* first arg in reg 3 */
141#define	NARGREG		8				/* 8 args in regs */
142#define	MOREARGS(sp)	((caddr_t)((int)(sp) + 8))	/* more args go here */
143
144#endif	/* _MACHINE_FRAME_H_ */
145