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vmparam.h revision 1.12 
      1 /*	$NetBSD: vmparam.h,v 1.12 2000/08/31 19:12:45 eeh Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * All advertising materials mentioning features or use of this software
     12  * must display the following acknowledgement:
     13  *	This product includes software developed by the University of
     14  *	California, Lawrence Berkeley Laboratory.
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  * 3. All advertising materials mentioning features or use of this software
     25  *    must display the following acknowledgement:
     26  *	This product includes software developed by the University of
     27  *	California, Berkeley and its contributors.
     28  * 4. Neither the name of the University nor the names of its contributors
     29  *    may be used to endorse or promote products derived from this software
     30  *    without specific prior written permission.
     31  *
     32  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     33  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     35  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     36  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     40  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     41  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     42  * SUCH DAMAGE.
     43  *
     44  *	@(#)vmparam.h	8.1 (Berkeley) 6/11/93
     45  */
     46 
     47 /*
     48  * Machine dependent constants for Sun-4c SPARC
     49  */
     50 
     51 #ifndef VMPARAM_H
     52 #define VMPARAM_H
     53 
     54 /*
     55  * USRTEXT is the start of the user text/data space, while USRSTACK
     56  * is the top (end) of the user stack.
     57  */
     58 #define	USRTEXT		0x2000			/* Start of user text */
     59 #define	USRSTACK	KERNBASE		/* Start of user stack */
     60 
     61 /*
     62  * Virtual memory related constants, all in bytes
     63  */
     64 #ifndef MAXTSIZ
     65 #define	MAXTSIZ		(64*1024*1024)		/* max text size */
     66 #endif
     67 #ifndef DFLDSIZ
     68 #define	DFLDSIZ		(64*1024*1024)		/* initial data size limit */
     69 #endif
     70 #ifndef MAXDSIZ
     71 #define	MAXDSIZ		(256*1024*1024)		/* max data size */
     72 #endif
     73 #ifndef	DFLSSIZ
     74 #define	DFLSSIZ		(512*1024)		/* initial stack size limit */
     75 #endif
     76 #ifndef	MAXSSIZ
     77 #define	MAXSSIZ		MAXDSIZ			/* max stack size */
     78 #endif
     79 
     80 /*
     81  * Size of shared memory map
     82  */
     83 #ifndef SHMMAXPGS
     84 #define SHMMAXPGS	1024
     85 #endif
     86 
     87 /*
     88  * The time for a process to be blocked before being very swappable.
     89  * This is a number of seconds which the system takes as being a non-trivial
     90  * amount of real time.  You probably shouldn't change this;
     91  * it is used in subtle ways (fractions and multiples of it are, that is, like
     92  * half of a ``long time'', almost a long time, etc.)
     93  * It is related to human patience and other factors which don't really
     94  * change over time.
     95  */
     96 #define	MAXSLP 		20
     97 
     98 /*
     99  * Mach derived constants
    100  */
    101 
    102 /*
    103  * User/kernel map constants.
    104  */
    105 #define VM_MIN_ADDRESS		((vaddr_t)0)
    106 #define VM_MAX_ADDRESS		((vaddr_t)KERNBASE)
    107 #define VM_MAXUSER_ADDRESS	((vaddr_t)KERNBASE)
    108 #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)KERNBASE)
    109 #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)KERNEND)
    110 
    111 #define VM_PHYSSEG_MAX          32       /* up to 32 segments */
    112 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
    113 #define VM_PHYSSEG_NOADD                /* can't add RAM after vm_mem_init */
    114 
    115 #define	VM_NFREELIST		1
    116 #define	VM_FREELIST_DEFAULT	0
    117 
    118 /*
    119  * pmap specific data stored in the vm_physmem[] array
    120  */
    121 
    122 struct pmap_physseg {
    123 	struct pv_entry *pvent;
    124 };
    125 
    126 #if defined (_KERNEL) && !defined(_LOCORE)
    127 struct vm_map;
    128 vaddr_t		dvma_mapin __P((struct vm_map *, vaddr_t, int, int));
    129 void		dvma_mapout __P((vaddr_t, vaddr_t, int));
    130 #endif
    131 #endif
    132