xref: /netbsd/sys/arch/sh3/include/wdtreg.h (revision 95e1ffb1)
1 /* $NetBSD: wdtreg.h,v 1.6 2005/12/11 12:18:59 christos Exp $ */
2 
3 /*-
4  * Copyright (C) 1999 SAITOH Masanobu.  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. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #ifndef _SH3_WDTREG_H_
30 #define	_SH3_WDTREG_H_
31 
32 /* WDT registers */
33 
34 #if !defined(SH4)
35 
36 /* SH3 definitions */
37 #define	SHREG_WTCNT	0xffffff84
38 #define	SHREG_WTCSR	0xffffff86
39 
40 #else
41 
42 /* SH4 definitions */
43 #define	SHREG_WTCNT	0xffc00008
44 #define	SHREG_WTCSR	0xffc0000c
45 
46 #endif
47 
48 /* read as bytes, write as shorts with a magic number in the upper byte */
49 #define	SHREG_WTCNT_R	(*(volatile unsigned char  *)SHREG_WTCNT)
50 #define	SHREG_WTCNT_W	(*(volatile unsigned short *)SHREG_WTCNT)
51 #define	SHREG_WTCSR_R	(*(volatile unsigned char  *)SHREG_WTCSR)
52 #define	SHREG_WTCSR_W	(*(volatile unsigned short *)SHREG_WTCSR)
53 
54 /* magic upper bytes for write access */
55 #define	WTCNT_W_M	0x5A00
56 #define	WTCSR_W_M	0xA500
57 
58 #define	WTCSR_TME	0x80
59 #define	WTCSR_WT	0x40
60 #define	WTCSR_RSTS	0x20
61 #define	WTCSR_WOVF	0x10
62 #define	WTCSR_IOVF	0x08
63 #define	WTCSR_CKS2	0x04
64 #define	WTCSR_CKS1	0x02
65 #define	WTCSR_CKS0	0x01
66 
67 #define	WTCSR_CKS	0x07
68 #define	WTCSR_CKS_1	0x00
69 #define	WTCSR_CKS_4	0x01
70 #define	WTCSR_CKS_16	0x02
71 #define	WTCSR_CKS_32	0x03
72 #define	WTCSR_CKS_64	0x04
73 #define	WTCSR_CKS_256	0x05
74 #define	WTCSR_CKS_1024	0x06
75 #define	WTCSR_CKS_4096	0x07
76 
77 #endif	/* !_SH3_WDTREG_H_ */
78