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vmparam3x.h revision 1.11 
      1 /*	$NetBSD: vmparam3x.h,v 1.11 1999/04/05 14:35:13 gwr Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
      6  * 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. 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 $Hdr: vmparam.h 1.16 91/01/18$
     41  *	from: @(#)vmparam.h	7.3 (Berkeley) 5/7/91
     42  *	vmparam.h,v 1.2 1993/05/22 07:58:38 cgd Exp
     43  */
     44 
     45 /*
     46  * Machine dependent constants for Sun3X
     47  */
     48 
     49 /*
     50  * USRTEXT is the start of the user text/data space, while
     51  * USRSTACK is the top (end) of the user stack.
     52  */
     53 #define	USRTEXT 	NBPG		/* Start of user text */
     54 #define	USRSTACK	KERNBASE	/* High end of user stack */
     55 
     56 /*
     57  * Virtual memory related constants, all in bytes
     58  */
     59 #ifndef MAXTSIZ
     60 #define	MAXTSIZ		(8*1024*1024)		/* max text size */
     61 #endif
     62 #ifndef DFLDSIZ
     63 #define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
     64 #endif
     65 #ifndef MAXDSIZ
     66 #define	MAXDSIZ		(128*1024*1024)		/* max data size */
     67 #endif
     68 #ifndef	DFLSSIZ
     69 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
     70 #endif
     71 #ifndef	MAXSSIZ
     72 #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
     73 #endif
     74 
     75 /*
     76  * PTEs for mapping user space into the kernel for phyio operations.
     77  * The actual limitation for physio requests will be the DVMA space,
     78  * and that is fixed by hardware design at 1MB.  We could make the
     79  * physio map larger than that, but it would not buy us much.
     80  */
     81 #ifndef USRIOSIZE
     82 #define USRIOSIZE	128	/* 1 MB */
     83 #endif
     84 
     85 /*
     86  * PTEs for system V style shared memory.
     87  * This is basically slop for kmempt which we actually allocate (malloc) from.
     88  */
     89 #ifndef SHMMAXPGS
     90 #define SHMMAXPGS	2048 	/* 16 MB */
     91 #endif
     92 
     93 /*
     94  * Mach-derived constants:
     95  */
     96 
     97 /* user/kernel map constants */
     98 #define VM_MIN_ADDRESS		((vm_offset_t)0)
     99 #define VM_MAX_ADDRESS		((vm_offset_t)KERNBASE)
    100 #define VM_MAXUSER_ADDRESS	((vm_offset_t)KERNBASE)
    101 #define VM_MIN_KERNEL_ADDRESS	((vm_offset_t)KERNBASE)
    102 #define VM_MAX_KERNEL_ADDRESS	((vm_offset_t)KERN_END)
    103 
    104 /* virtual sizes (bytes) for various kernel submaps */
    105 #define VM_MBUF_SIZE		(NMBCLUSTERS*MCLBYTES)
    106 #define VM_KMEM_SIZE		(NKMEMCLUSTERS*CLBYTES)
    107 #define VM_PHYS_SIZE		(USRIOSIZE*CLBYTES)
    108 
    109 #define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
    110 #define VM_PHYSSEG_NOADD	/* can't add RAM after vm_mem_init */
    111 
    112 #define	VM_NFREELIST		1
    113 #define	VM_FREELIST_DEFAULT	0
    114