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param.h revision 1.18 
      1 /*	$NetBSD: param.h,v 1.18 1997/02/26 01:45:41 jonathan Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1992, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department and Ralph Campbell.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by the University of
     23  *	California, Berkeley and its contributors.
     24  * 4. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  * from: Utah Hdr: machparam.h 1.11 89/08/14
     41  *
     42  *	@(#)param.h	8.1 (Berkeley) 6/10/93
     43  */
     44 
     45 /*
     46  * Machine-dependent constants (VM, etc) common across MIPS cpus
     47  */
     48 
     49 #include <mips/mips_param.h>
     50 
     51 /*
     52  * Machine dependent constants for DEC Station 3100.
     53  */
     54 
     55 #define	_MACHINE	pmax
     56 #define	MACHINE		"pmax"
     57 #define	_MACHINE_ARCH	mips
     58 #define	MACHINE_ARCH	"mips"
     59 #define	MID_MACHINE	MID_PMAX
     60 
     61 #define	KERNBASE	0x80000000	/* start of kernel virtual */
     62 #define KERNTEXTOFF	0x80030000	/* start of kernel text for kvm_mkdb */
     63 #define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
     64 
     65 #define	DEV_BSIZE	512
     66 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     67 #define BLKDEV_IOSIZE	2048
     68 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     69 
     70 #define	CLSIZE		1
     71 #define	CLSIZELOG2	0
     72 
     73 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
     74 #define	SSIZE		1		/* initial stack size/NBPG */
     75 #define	SINCR		1		/* increment of stack/NBPG */
     76 
     77 #define	UPAGES		2		/* pages of u-area */
     78 #define	UADDR		0xffffd000	/* address of u */
     79 #define USPACE          (UPAGES*NBPG)   /* size of u-area in bytes */
     80 #define	UVPN		(UADDR>>PGSHIFT)/* virtual page number of u */
     81 #define	KERNELSTACK	(UADDR+UPAGES*NBPG)	/* top of kernel stack */
     82 
     83 /*
     84  * Constants related to network buffer management.
     85  * MCLBYTES must be no larger than CLBYTES (the software page size), and,
     86  * on machines that exchange pages of input or output buffers with mbuf
     87  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     88  * of the hardware page size.
     89  */
     90 #define	MSIZE		128		/* size of an mbuf */
     91 
     92 #ifndef MCLSHIFT
     93 
     94 # define	MCLSHIFT	11	/* convert bytes to m_buf clusters */
     95 					/* 2K cluster can hold Ether frame */
     96 #endif	/* MCLSHIFT */
     97 
     98 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
     99 #define	MCLOFSET	(MCLBYTES - 1)
    100 
    101 #ifndef NMBCLUSTERS
    102 #ifdef GATEWAY
    103 #define	NMBCLUSTERS	2048		/* map size, max cluster allocation */
    104 #else
    105 #define	NMBCLUSTERS	1024		/* map size, max cluster allocation */
    106 #endif
    107 #endif
    108 
    109 #ifdef _KERNEL
    110 #ifndef _LOCORE
    111 extern int cpuspeed;
    112 #define	DELAY(n)	{ register int N = cpuspeed * (n); while (--N > 0); }
    113 #endif
    114 #endif /* !_KERNEL */
    115