Home | History | Annotate | Line # | Download | only in include
param.h revision 1.15 
      1 /*	$NetBSD: param.h,v 1.15 2003/01/19 00:25:22 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
      5  * Copyright (C) 1995, 1996 TooLs GmbH.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by TooLs GmbH.
     19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef _POWERPC_PARAM_H
     35 #define	_POWERPC_PARAM_H
     36 
     37 #ifdef	_KERNEL
     38 #ifndef	_LOCORE
     39 #include <machine/cpu.h>
     40 #endif	/* _LOCORE */
     41 #endif
     42 
     43 /*
     44  * Machine dependent constants for PowerPC (32-bit only currently)
     45  */
     46 #ifndef MACHINE
     47 #define	MACHINE		"powerpc"
     48 #endif
     49 #define	MACHINE_ARCH	"powerpc"
     50 #define	MID_MACHINE	MID_POWERPC
     51 
     52 #define	ALIGNBYTES		(sizeof(double) - 1)
     53 #define	ALIGN(p)		(((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES)
     54 #define ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
     55 
     56 #define	PGSHIFT		12
     57 #define	NBPG		(1 << PGSHIFT)	/* Page size */
     58 #define	PGOFSET		(NBPG - 1)
     59 
     60 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     61 #define	DEV_BSIZE	(1 << DEV_BSHIFT)
     62 #define	BLKDEV_IOSIZE	NBPG
     63 #ifndef MAXPHYS
     64 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     65 #endif
     66 
     67 #define	UPAGES		4
     68 #define	USPACE		(UPAGES * NBPG)
     69 
     70 #ifndef	MSGBUFSIZE
     71 #define	MSGBUFSIZE	(2*NBPG)	/* default message buffer size */
     72 #endif
     73 
     74 #ifndef KERNBASE
     75 #define	KERNBASE	0x100000
     76 #endif
     77 
     78 /*
     79  * Constants related to network buffer management.
     80  * MCLBYTES must be no larger than NBPG (the software page size), and,
     81  * on machines that exchange pages of input or output buffers with mbuf
     82  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     83  * of the hardware page size.
     84  */
     85 #define	MSIZE		256		/* size of an mbuf */
     86 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
     87 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
     88 
     89 #ifndef NMBCLUSTERS
     90 
     91 #if defined(_KERNEL_OPT)
     92 #include "opt_gateway.h"
     93 #endif
     94 
     95 #ifdef GATEWAY
     96 #define	NMBCLUSTERS	2048		/* map size, max cluster allocation */
     97 #else
     98 #define	NMBCLUSTERS	1024		/* map size, max cluster allocation */
     99 #endif
    100 #endif
    101 
    102 /*
    103  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
    104  * logical pages.
    105  */
    106 #ifndef NKMEMPAGES_MIN_DEFAULT
    107 #define	NKMEMPAGES_MIN_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
    108 #endif
    109 #ifndef NKMEMPAGES_MAX_DEFAULT
    110 #define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
    111 #endif
    112 
    113 /*
    114  * pages ("clicks") to disk blocks
    115  */
    116 #define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
    117 #define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
    118 /*
    119  * bytes to pages
    120  */
    121 #define	ctob(x)		((x) << PGSHIFT)
    122 #define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
    123 
    124 /*
    125  * bytes to disk blocks
    126  */
    127 #define	dbtob(x)	((x) << DEV_BSHIFT)
    128 #define	btodb(x)	((x) >> DEV_BSHIFT)
    129 
    130 #ifdef OLDPMAP
    131 /*
    132  * Segment handling stuff
    133  */
    134 #define	SEGMENT_LENGTH	0x10000000
    135 #define	SEGMENT_MASK	0xf0000000
    136 
    137 /*
    138  * Fixed segments
    139  */
    140 #define	USER_SR		13
    141 #define	KERNEL_SR	14
    142 #define	KERNEL_SEGMENT	(0xf00000 + KERNEL_SR)
    143 #define	EMPTY_SEGMENT	0xfffff0
    144 #define	USER_ADDR	((void *)(USER_SR << ADDR_SR_SHFT))
    145 
    146 /*
    147  * Some system constants
    148  */
    149 #ifndef	NPMAPS
    150 #define	NPMAPS		32768	/* Number of pmaps in system */
    151 #endif
    152 
    153 #endif /* OLDPMAP */
    154 
    155 #endif /* _POWERPC_PARAM_H_ */
    156