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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