param.h revision 1.1 
1/*	$NetBSD: param.h,v 1.1 2001/06/23 13:25:19 bjh21 Exp $	*/
2
3/*
4 * Copyright (c) 1994,1995 Mark Brinicombe.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the RiscBSD team.
18 * 4. The name "RiscBSD" nor the name of the author may be used to
19 *    endorse or promote products derived from this software without specific
20 *    prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef	_ARM_PARAM_H_
36#define	_ARM_PARAM_H_
37
38/*
39 * Machine dependent constants for all ARM processors
40 */
41
42/* MACHINE and MACHINE_ARCH are defined by individual ports. */
43
44#define	MID_MACHINE	MID_ARM6
45
46/*
47 * Round p (pointer or byte index) up to a correctly-aligned value
48 * for all data types (int, long, ...).   The result is u_int and
49 * must be cast to any desired pointer type.
50 *
51 * ALIGNED_POINTER is a boolean macro that checks whether an address
52 * is valid to fetch data elements of type t from on this architecture.
53 * This does not reflect the optimal alignment, just the possibility
54 * (within reasonable limits).
55 *
56 */
57#define ALIGNBYTES		(sizeof(int) - 1)
58#define ALIGN(p)		(((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
59#define ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
60
61/* pages ("clicks") to disk blocks */
62#define	ctod(x)	((x) << (PGSHIFT - DEV_BSHIFT))
63#define	dtoc(x)	((x) >> (PGSHIFT - DEV_BSHIFT))
64/*#define	dtob(x)	((x) << DEV_BSHIFT)*/
65
66#define	ctob(x)	((x) << PGSHIFT)
67
68/* bytes to pages */
69#define	btoc(x)	(((x) + PGOFSET) >> PGSHIFT)
70
71#define	btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
72	((bytes) >> DEV_BSHIFT)
73#define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
74	((db) << DEV_BSHIFT)
75
76/*
77 * Map a ``block device block'' to a file system block.
78 * This should be device dependent, and should use the bsize
79 * field from the disk label.
80 * For now though just use DEV_BSIZE.
81 */
82#define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE / DEV_BSIZE))
83
84#endif /* _ARM_PARAM_H_ */
85