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vmparam.h revision 1.14 
      1 /*	$NetBSD: vmparam.h,v 1.14 2000/12/18 14:48:26 mrg 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 USRSTACK32	0xffffe000L
     60 #ifdef __arch64__
     61 #define USRSTACK	0xffffffffffffe000L
     62 #else
     63 #define USRSTACK	USRSTACK32
     64 #endif
     65 
     66 /*
     67  * Virtual memory related constants, all in bytes
     68  *
     69  * XXXX -- These need to be updated to 64-bits.
     70  */
     71 #ifndef MAXTSIZ
     72 #define	MAXTSIZ		(256*1024*1024)		/* max text size */
     73 #endif
     74 #ifndef DFLDSIZ
     75 #define	DFLDSIZ		(128*1024*1024)		/* initial data size limit */
     76 #endif
     77 #ifndef MAXDSIZ
     78 #define	MAXDSIZ		(1024*1024*1024)	/* max data size */
     79 #endif
     80 #ifndef	DFLSSIZ
     81 #define	DFLSSIZ		(1024*1024)		/* initial stack size limit */
     82 #endif
     83 #ifndef	MAXSSIZ
     84 #define	MAXSSIZ		MAXDSIZ			/* max stack size */
     85 #endif
     86 
     87 /*
     88  * Size of shared memory map
     89  */
     90 #ifndef SHMMAXPGS
     91 #define SHMMAXPGS	1024
     92 #endif
     93 
     94 /*
     95  * The time for a process to be blocked before being very swappable.
     96  * This is a number of seconds which the system takes as being a non-trivial
     97  * amount of real time.  You probably shouldn't change this;
     98  * it is used in subtle ways (fractions and multiples of it are, that is, like
     99  * half of a ``long time'', almost a long time, etc.)
    100  * It is related to human patience and other factors which don't really
    101  * change over time.
    102  */
    103 #define	MAXSLP 		20
    104 
    105 /*
    106  * Mach derived constants
    107  */
    108 
    109 /*
    110  * User/kernel map constants.
    111  */
    112 #define VM_MIN_ADDRESS		((vaddr_t)0)
    113 #define VM_MAX_ADDRESS		((vaddr_t)-1)
    114 #define VM_MAXUSER_ADDRESS	((vaddr_t)-1)
    115 
    116 #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)KERNBASE)
    117 #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)KERNEND)
    118 
    119 #define VM_PHYSSEG_MAX          32       /* up to 32 segments */
    120 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
    121 #define VM_PHYSSEG_NOADD                /* can't add RAM after vm_mem_init */
    122 
    123 #define	VM_NFREELIST		1
    124 #define	VM_FREELIST_DEFAULT	0
    125 
    126 /*
    127  * pmap specific data stored in the vm_physmem[] array
    128  */
    129 
    130 struct pmap_physseg {
    131 	struct pv_entry *pvent;
    132 };
    133 
    134 #if defined (_KERNEL) && !defined(_LOCORE)
    135 struct vm_map;
    136 vaddr_t		dvma_mapin __P((struct vm_map *, vaddr_t, int, int));
    137 void		dvma_mapout __P((vaddr_t, vaddr_t, int));
    138 #endif
    139 #endif
    140