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vmparam.h revision 1.1.4.3 
      1 /*	$NetBSD: vmparam.h,v 1.1.4.3 2002/08/31 13:44:48 gehenna Exp $	*/
      2 
      3 /*	$OpenBSD: vmparam.h,v 1.17 2001/09/22 18:00:09 miod Exp $	*/
      4 
      5 /*
      6  * Copyright (c) 1988-1994, The University of Utah and
      7  * the Computer Systems Laboratory at the University of Utah (CSL).
      8  * All rights reserved.
      9  *
     10  * Permission to use, copy, modify and distribute this software is hereby
     11  * granted provided that (1) source code retains these copyright, permission,
     12  * and disclaimer notices, and (2) redistributions including binaries
     13  * reproduce the notices in supporting documentation, and (3) all advertising
     14  * materials mentioning features or use of this software display the following
     15  * acknowledgement: ``This product includes software developed by the
     16  * Computer Systems Laboratory at the University of Utah.''
     17  *
     18  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
     19  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
     20  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     21  *
     22  * CSL requests users of this software to return to csl-dist (at) cs.utah.edu any
     23  * improvements that they make and grant CSL redistribution rights.
     24  *
     25  * 	Utah $Hdr: vmparam.h 1.16 94/12/16$
     26  */
     27 
     28 #ifndef _HPPA_VMPARAM_H_
     29 #define _HPPA_VMPARAM_H_
     30 
     31 /*
     32  * Machine dependent constants for HP PA
     33  */
     34 /*
     35  * USRTEXT is the start of the user text/data space, while USRSTACK
     36  * is the top (end) of the user stack.  LOWPAGES and HIGHPAGES are
     37  * the number of pages from the beginning of the P0 region to the
     38  * beginning of the text and from the beginning of the P1 region to the
     39  * beginning of the stack respectively.
     40  */
     41 #define	USRTEXT		0x00002000		/* Start of user .text */
     42 #define	USRSTACK	0x68FF3000		/* Start of user stack */
     43 #define	LOWPAGES	0
     44 #define	HIGHPAGES	UPAGES
     45 #define	SYSCALLGATE	0xC0000000		/* syscall gateway page */
     46 
     47 /* Alignment requirement for a uspace. */
     48 #define	USPACE_ALIGN	NBPG
     49 
     50 /*
     51  * Virtual memory related constants, all in bytes
     52  */
     53 #ifndef MAXTSIZ
     54 #define	MAXTSIZ		(0x40000000)		/* max text size */
     55 #endif
     56 #ifndef DFLDSIZ
     57 #define	DFLDSIZ		(16*1024*1024)		/* initial data size limit */
     58 #endif
     59 #ifndef MAXDSIZ
     60 #define	MAXDSIZ		(USRSTACK-MAXTSIZ)	/* max data size */
     61 #endif
     62 #ifndef	DFLSSIZ
     63 #define	DFLSSIZ		(512*1024)		/* initial stack size limit */
     64 #endif
     65 #ifndef	MAXSSIZ
     66 #define	MAXSSIZ		(UADDR-USRSTACK)	/* max stack size */
     67 #endif
     68 
     69 #ifndef USRIOSIZE
     70 #define	USRIOSIZE	((2*HPPA_PGALIAS)/PAGE_SIZE)	/* 2mb */
     71 #endif
     72 
     73 /*
     74  * PTEs for system V style shared memory.
     75  * This is basically slop for kmempt which we actually allocate (malloc) from.
     76  */
     77 #ifndef SHMMAXPGS
     78 #define SHMMAXPGS	((1024*1024*10)/NBPG)	/* 10mb */
     79 #endif
     80 
     81 /*
     82  * The time for a process to be blocked before being very swappable.
     83  * This is a number of seconds which the system takes as being a non-trivial
     84  * amount of real time.  You probably shouldn't change this;
     85  * it is used in subtle ways (fractions and multiples of it are, that is, like
     86  * half of a ``long time'', almost a long time, etc.)
     87  * It is related to human patience and other factors which don't really
     88  * change over time.
     89  */
     90 #define	MAXSLP 		20
     91 
     92 /* user/kernel map constants */
     93 #define	VM_MIN_ADDRESS		((vaddr_t)0)
     94 #define	VM_MAXUSER_ADDRESS	((vaddr_t)0xc0000000)
     95 #define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
     96 #define	VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
     97 #define	VM_MAX_KERNEL_ADDRESS	((vaddr_t)0xf0000000)
     98 
     99 /* virtual sizes (bytes) for various kernel submaps */
    100 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
    101 
    102 #define	VM_PHYSSEG_MAX	8	/* this many physmem segments */
    103 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BIGFIRST
    104 
    105 #define	VM_PHYSSEG_NOADD	/* XXX until uvm code is fixed */
    106 
    107 #define	VM_NFREELIST		1
    108 #define	VM_FREELIST_DEFAULT	0
    109 
    110 #endif	/* _HPPA_VMPARAM_H_ */
    111 
    112