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vmparam.h revision 1.1
      1  1.1  itojun /*	$NetBSD: vmparam.h,v 1.1 1999/09/13 10:31:24 itojun Exp $	*/
      2  1.1  itojun 
      3  1.1  itojun /*-
      4  1.1  itojun  * Copyright (c) 1990 The Regents of the University of California.
      5  1.1  itojun  * All rights reserved.
      6  1.1  itojun  *
      7  1.1  itojun  * This code is derived from software contributed to Berkeley by
      8  1.1  itojun  * William Jolitz.
      9  1.1  itojun  *
     10  1.1  itojun  * Redistribution and use in source and binary forms, with or without
     11  1.1  itojun  * modification, are permitted provided that the following conditions
     12  1.1  itojun  * are met:
     13  1.1  itojun  * 1. Redistributions of source code must retain the above copyright
     14  1.1  itojun  *    notice, this list of conditions and the following disclaimer.
     15  1.1  itojun  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1  itojun  *    notice, this list of conditions and the following disclaimer in the
     17  1.1  itojun  *    documentation and/or other materials provided with the distribution.
     18  1.1  itojun  * 3. All advertising materials mentioning features or use of this software
     19  1.1  itojun  *    must display the following acknowledgement:
     20  1.1  itojun  *	This product includes software developed by the University of
     21  1.1  itojun  *	California, Berkeley and its contributors.
     22  1.1  itojun  * 4. Neither the name of the University nor the names of its contributors
     23  1.1  itojun  *    may be used to endorse or promote products derived from this software
     24  1.1  itojun  *    without specific prior written permission.
     25  1.1  itojun  *
     26  1.1  itojun  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  1.1  itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  1.1  itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  1.1  itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  1.1  itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  1.1  itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  1.1  itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  1.1  itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  1.1  itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  1.1  itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  1.1  itojun  * SUCH DAMAGE.
     37  1.1  itojun  *
     38  1.1  itojun  *	@(#)vmparam.h	5.9 (Berkeley) 5/12/91
     39  1.1  itojun  */
     40  1.1  itojun 
     41  1.1  itojun #ifndef _MACHINE_VMPARAM_H_
     42  1.1  itojun #define _MACHINE_VMPARAM_H_
     43  1.1  itojun 
     44  1.1  itojun /*
     45  1.1  itojun  * Machine dependent constants for sh3.
     46  1.1  itojun  */
     47  1.1  itojun 
     48  1.1  itojun /*
     49  1.1  itojun  * Virtual address space arrangement. On 386, both user and kernel
     50  1.1  itojun  * share the address space, not unlike the vax.
     51  1.1  itojun  * USRTEXT is the start of the user text/data space, while USRSTACK
     52  1.1  itojun  * is the top (end) of the user stack. Immediately above the user stack
     53  1.1  itojun  * resides the user structure, which is UPAGES long and contains the
     54  1.1  itojun  * kernel stack.
     55  1.1  itojun  *
     56  1.1  itojun  * Immediately after the user structure is the page table map, and then
     57  1.1  itojun  * kernal address space.
     58  1.1  itojun  */
     59  1.1  itojun #define	USRTEXT		CLBYTES
     60  1.1  itojun #define	USRSTACK	VM_MAXUSER_ADDRESS
     61  1.1  itojun 
     62  1.1  itojun /*
     63  1.1  itojun  * Virtual memory related constants, all in bytes
     64  1.1  itojun  */
     65  1.1  itojun #define	MAXTSIZ		(64*1024*1024)		/* max text size */
     66  1.1  itojun #ifndef DFLDSIZ
     67  1.1  itojun #define	DFLDSIZ		(128*1024*1024)		/* initial data size limit */
     68  1.1  itojun #endif
     69  1.1  itojun #ifndef MAXDSIZ
     70  1.1  itojun #define	MAXDSIZ		(1*1024*1024*1024)	/* max data size */
     71  1.1  itojun #endif
     72  1.1  itojun #ifndef	DFLSSIZ
     73  1.1  itojun #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
     74  1.1  itojun #endif
     75  1.1  itojun #ifndef	MAXSSIZ
     76  1.1  itojun #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
     77  1.1  itojun #endif
     78  1.1  itojun 
     79  1.1  itojun /*
     80  1.1  itojun  * Size of shared memory map
     81  1.1  itojun  */
     82  1.1  itojun #ifndef SHMMAXPGS
     83  1.1  itojun #define SHMMAXPGS	1024
     84  1.1  itojun #endif
     85  1.1  itojun 
     86  1.1  itojun /*
     87  1.1  itojun  * Size of User Raw I/O map
     88  1.1  itojun  */
     89  1.1  itojun #define	USRIOSIZE 	300
     90  1.1  itojun 
     91  1.1  itojun /*
     92  1.1  itojun  * The time for a process to be blocked before being very swappable.
     93  1.1  itojun  * This is a number of seconds which the system takes as being a non-trivial
     94  1.1  itojun  * amount of real time.  You probably shouldn't change this;
     95  1.1  itojun  * it is used in subtle ways (fractions and multiples of it are, that is, like
     96  1.1  itojun  * half of a ``long time'', almost a long time, etc.)
     97  1.1  itojun  * It is related to human patience and other factors which don't really
     98  1.1  itojun  * change over time.
     99  1.1  itojun  */
    100  1.1  itojun #define	MAXSLP 		20
    101  1.1  itojun 
    102  1.1  itojun /*
    103  1.1  itojun  * A swapped in process is given a small amount of core without being bothered
    104  1.1  itojun  * by the page replacement algorithm.  Basically this says that if you are
    105  1.1  itojun  * swapped in you deserve some resources.  We protect the last SAFERSS
    106  1.1  itojun  * pages against paging and will just swap you out rather than paging you.
    107  1.1  itojun  * Note that each process has at least UPAGES+CLSIZE pages which are not
    108  1.1  itojun  * paged anyways (this is currently 8+2=10 pages or 5k bytes), so this
    109  1.1  itojun  * number just means a swapped in process is given around 25k bytes.
    110  1.1  itojun  * Just for fun: current memory prices are 4600$ a megabyte on VAX (4/22/81),
    111  1.1  itojun  * so we loan each swapped in process memory worth 100$, or just admit
    112  1.1  itojun  * that we don't consider it worthwhile and swap it out to disk which costs
    113  1.1  itojun  * $30/mb or about $0.75.
    114  1.1  itojun  * { wfj 6/16/89: Retail AT memory expansion $800/megabyte, loan of $17
    115  1.1  itojun  *   on disk costing $7/mb or $0.18 (in memory still 100:1 in cost!) }
    116  1.1  itojun  * Update: memory prices have changed recently (9/96). At the current
    117  1.1  itojun  * value of $6 per megabyte, we lend each swapped in process memory worth
    118  1.1  itojun  * $0.15, or just admit that we don't consider it worthwhile and swap it out
    119  1.1  itojun  * to disk which costs $0.20/MB, or just under half a cent.
    120  1.1  itojun  */
    121  1.1  itojun #define	SAFERSS		8		/* nominal ``small'' resident set size
    122  1.1  itojun 					   protected against replacement */
    123  1.1  itojun 
    124  1.1  itojun /*
    125  1.1  itojun  * Mach derived constants
    126  1.1  itojun  */
    127  1.1  itojun 
    128  1.1  itojun /* user/kernel map constants */
    129  1.1  itojun #define VM_MIN_ADDRESS		((vaddr_t)0)
    130  1.1  itojun /* PTDPTDI<<PDSHIFT - UPAGES*NBPG */
    131  1.1  itojun #define VM_MAXUSER_ADDRESS	((vaddr_t)0x7fffe000)
    132  1.1  itojun /* PTDPTDI<<PDSHIFT + PTDPTDI<<PGSHIFT */
    133  1.1  itojun #define VM_MAX_ADDRESS		((vaddr_t)0xcffbf000)
    134  1.1  itojun /* KPTDI<<PDSHIFT */
    135  1.1  itojun #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0xd0000000)
    136  1.1  itojun /* APTDPTDI<<PDSHIFT */
    137  1.1  itojun #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)0xdfc00000)
    138  1.1  itojun 
    139  1.1  itojun /* XXX max. amount of KVM to be used by buffers. */
    140  1.1  itojun #ifndef VM_MAX_KERNEL_BUF
    141  1.1  itojun #define VM_MAX_KERNEL_BUF \
    142  1.1  itojun 	((VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) * 7 / 10)
    143  1.1  itojun #endif
    144  1.1  itojun 
    145  1.1  itojun /* virtual sizes (bytes) for various kernel submaps */
    146  1.1  itojun #define VM_MBUF_SIZE		(NMBCLUSTERS*MCLBYTES)
    147  1.1  itojun #define VM_KMEM_SIZE		(NKMEMCLUSTERS*CLBYTES)
    148  1.1  itojun #define VM_PHYS_SIZE		(USRIOSIZE*CLBYTES)
    149  1.1  itojun 
    150  1.1  itojun #define VM_PHYSSEG_MAX		1
    151  1.1  itojun #define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    152  1.1  itojun #define VM_PHYSSEG_NOADD		/* no more after vm_mem_init */
    153  1.1  itojun 
    154  1.1  itojun #define VM_NFREELIST		1
    155  1.1  itojun #define VM_FREELIST_DEFAULT	0
    156  1.1  itojun 
    157  1.1  itojun /*
    158  1.1  itojun  * pmap specific data stored in the vm_physmem[] array
    159  1.1  itojun  */
    160  1.1  itojun #if defined(PMAP_NEW)
    161  1.1  itojun struct pmap_physseg {
    162  1.1  itojun 	struct pv_head *pvhead;		/* pv_head array */
    163  1.1  itojun 	char *attrs;			/* attrs array */
    164  1.1  itojun };
    165  1.1  itojun #else
    166  1.1  itojun struct pmap_physseg {
    167  1.1  itojun 	struct pv_entry *pvent;		/* pv_entry array */
    168  1.1  itojun 	char *attrs;			/* attrs array */
    169  1.1  itojun };
    170  1.1  itojun #endif
    171  1.1  itojun 
    172  1.1  itojun #endif /* _MACHINE_VMPARAM_H_ */
    173