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param.h revision 1.1
      1  1.1  ws /*	$NetBSD: param.h,v 1.1 1996/09/30 16:34:28 ws Exp $	*/
      2  1.1  ws 
      3  1.1  ws /*-
      4  1.1  ws  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
      5  1.1  ws  * Copyright (C) 1995, 1996 TooLs GmbH.
      6  1.1  ws  * All rights reserved.
      7  1.1  ws  *
      8  1.1  ws  * Redistribution and use in source and binary forms, with or without
      9  1.1  ws  * modification, are permitted provided that the following conditions
     10  1.1  ws  * are met:
     11  1.1  ws  * 1. Redistributions of source code must retain the above copyright
     12  1.1  ws  *    notice, this list of conditions and the following disclaimer.
     13  1.1  ws  * 2. Redistributions in binary form must reproduce the above copyright
     14  1.1  ws  *    notice, this list of conditions and the following disclaimer in the
     15  1.1  ws  *    documentation and/or other materials provided with the distribution.
     16  1.1  ws  * 3. All advertising materials mentioning features or use of this software
     17  1.1  ws  *    must display the following acknowledgement:
     18  1.1  ws  *	This product includes software developed by TooLs GmbH.
     19  1.1  ws  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     20  1.1  ws  *    derived from this software without specific prior written permission.
     21  1.1  ws  *
     22  1.1  ws  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     23  1.1  ws  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  1.1  ws  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  1.1  ws  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  1.1  ws  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     27  1.1  ws  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     28  1.1  ws  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  1.1  ws  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     30  1.1  ws  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     31  1.1  ws  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  1.1  ws  */
     33  1.1  ws 
     34  1.1  ws #ifdef	_KERNEL
     35  1.1  ws #ifndef	_LOCORE
     36  1.1  ws #include <machine/cpu.h>
     37  1.1  ws #endif	/* _LOCORE */
     38  1.1  ws #endif
     39  1.1  ws 
     40  1.1  ws /*
     41  1.1  ws  * Machine dependent constants for PowerPC (32-bit only currently)
     42  1.1  ws  */
     43  1.1  ws #define	MACHINE		"powerpc"
     44  1.1  ws #define	MACHINE_ARCH	"powerpc"
     45  1.1  ws #define	MID_MACHINE	MID_POWERPC
     46  1.1  ws 
     47  1.1  ws #define	ALIGNBYTES	(sizeof(double) - 1)
     48  1.1  ws #define	ALIGN(p)	(((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
     49  1.1  ws 
     50  1.1  ws #define	PGSHIFT		12
     51  1.1  ws #define	NBPG		(1 << PGSHIFT)	/* Page size */
     52  1.1  ws #define	PGOFSET		(NBPG - 1)
     53  1.1  ws 
     54  1.1  ws #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     55  1.1  ws #define	DEV_BSIZE	(1 << DEV_BSHIFT)
     56  1.1  ws #define	BLKDEV_IOSIZE	NBPG
     57  1.1  ws #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     58  1.1  ws 
     59  1.1  ws #define	CLSIZELOG2	0
     60  1.1  ws #define	CLSIZE		(1 << CLSIZELOG2)
     61  1.1  ws 
     62  1.1  ws #define	UPAGES		4
     63  1.1  ws #define	USPACE		(UPAGES * NBPG)
     64  1.1  ws 
     65  1.1  ws #define	KERNBASE	0x100000
     66  1.1  ws 
     67  1.1  ws /*
     68  1.1  ws  * Constants related to network buffer management.
     69  1.1  ws  * MCLBYTES must be no larger than CLBYTES (the software page size), and,
     70  1.1  ws  * on machines that exchange pages of input or output buffers with mbuf
     71  1.1  ws  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     72  1.1  ws  * of the hardware page size.
     73  1.1  ws  */
     74  1.1  ws #define	MSIZE		128		/* size of an mbuf */
     75  1.1  ws #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
     76  1.1  ws #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
     77  1.1  ws 
     78  1.1  ws #ifndef NMBCLUSTERS
     79  1.1  ws #ifdef GATEWAY
     80  1.1  ws #define	NMBCLUSTERS	512		/* map size, max cluster allocation */
     81  1.1  ws #else
     82  1.1  ws #define	NMBCLUSTERS	256		/* map size, max cluster allocation */
     83  1.1  ws #endif
     84  1.1  ws #endif
     85  1.1  ws 
     86  1.1  ws /*
     87  1.1  ws  * Size of kernel malloc arena in CLBYTES-sized logical pages.
     88  1.1  ws  */
     89  1.1  ws #ifndef	NKMEMCLUSTERS
     90  1.1  ws #define	NKMEMCLUSTERS	(128 * 1024 * 1024 / CLBYTES)
     91  1.1  ws #endif
     92  1.1  ws 
     93  1.1  ws /*
     94  1.1  ws  * pages ("clicks") to disk blocks
     95  1.1  ws  */
     96  1.1  ws #define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
     97  1.1  ws #define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
     98  1.1  ws /*
     99  1.1  ws  * bytes to pages
    100  1.1  ws  */
    101  1.1  ws #define	ctob(x)		((x) << PGSHIFT)
    102  1.1  ws #define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
    103  1.1  ws 
    104  1.1  ws /*
    105  1.1  ws  * bytes to disk blocks
    106  1.1  ws  */
    107  1.1  ws #define	dbtob(x)	((x) << DEV_BSHIFT)
    108  1.1  ws #define	btodb(x)	((x) >> DEV_BSHIFT)
    109  1.1  ws 
    110  1.1  ws /*
    111  1.1  ws  * Segment handling stuff
    112  1.1  ws  */
    113  1.1  ws #define	SEGMENT_LENGTH	0x10000000
    114  1.1  ws #define	SEGMENT_MASK	0xf0000000
    115  1.1  ws 
    116  1.1  ws /*
    117  1.1  ws  * Fixed segments
    118  1.1  ws  */
    119  1.1  ws #define	USER_SR		13
    120  1.1  ws #define	KERNEL_SR	14
    121  1.1  ws #define	KERNEL_SEGMENT	(0xfffff0 + KERNEL_SR)
    122  1.1  ws #define	EMPTY_SEGMENT	0xfffff0
    123  1.1  ws #define	USER_ADDR	((void *)(USER_SR << ADDR_SR_SHFT))
    124  1.1  ws 
    125  1.1  ws /*
    126  1.1  ws  * Some system constants
    127  1.1  ws  */
    128  1.1  ws #ifndef	HTABENTS
    129  1.1  ws #define	HTABENTS	1024	/* Number of hashslots in HTAB */
    130  1.1  ws #endif
    131  1.1  ws #ifndef	NPMAPS
    132  1.1  ws #define	NPMAPS		32768	/* Number of pmaps in system */
    133  1.1  ws #endif
    134  1.1  ws 
    135  1.1  ws /*
    136  1.1  ws  * Temporary kludge till we do (ov)bcopy in assembler
    137  1.1  ws  */
    138  1.1  ws #define	ovbcopy	bcopy
    139