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param3.h revision 1.57 
      1 /*	$NetBSD: param3.h,v 1.57 2018/03/03 03:19:36 mrg Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1982, 1986, 1990, 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.
     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. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	from: Utah Hdr: machparam.h 1.16 92/12/20
     37  *	from: @(#)param.h	8.1 (Berkeley) 6/10/93
     38  */
     39 
     40 /*
     41  * Machine dependent constants for the Sun3 series.
     42  */
     43 
     44 #define	KERNBASE3	0x0E000000	/* start of kernel virtual */
     45 #define	KERN_END3	0x0FE00000	/* end of kernel virtual */
     46 
     47 /*
     48  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
     49  * logical pages.
     50  * Note maximum value can't be so large due to limited KVA space as above.
     51  */
     52 #define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
     53 #define	NKMEMPAGES_MAX_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
     54 
     55 /* Use smaller UBC_NWINS to avoid KVA space shortage. */
     56 #define	UBC_NWINS	128
     57 #define	MAXEXEC		1
     58