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vmparam.h revision 1.29
      1  1.29  thorpej /*	$NetBSD: vmparam.h,v 1.29 2001/04/29 22:44:35 thorpej Exp $	*/
      2   1.6      cgd 
      3   1.1   briggs /*
      4   1.1   briggs  * Copyright (c) 1988 University of Utah.
      5   1.1   briggs  * Copyright (c) 1982, 1990 The Regents of the University of California.
      6   1.1   briggs  * All rights reserved.
      7   1.1   briggs  *
      8   1.1   briggs  * This code is derived from software contributed to Berkeley by
      9   1.1   briggs  * the Systems Programming Group of the University of Utah Computer
     10   1.1   briggs  * Science Department.
     11   1.1   briggs  *
     12   1.1   briggs  * Redistribution and use in source and binary forms, with or without
     13   1.1   briggs  * modification, are permitted provided that the following conditions
     14   1.1   briggs  * are met:
     15   1.1   briggs  * 1. Redistributions of source code must retain the above copyright
     16   1.1   briggs  *    notice, this list of conditions and the following disclaimer.
     17   1.1   briggs  * 2. Redistributions in binary form must reproduce the above copyright
     18   1.1   briggs  *    notice, this list of conditions and the following disclaimer in the
     19   1.1   briggs  *    documentation and/or other materials provided with the distribution.
     20   1.1   briggs  * 3. All advertising materials mentioning features or use of this software
     21   1.1   briggs  *    must display the following acknowledgement:
     22   1.1   briggs  *	This product includes software developed by the University of
     23   1.1   briggs  *	California, Berkeley and its contributors.
     24   1.1   briggs  * 4. Neither the name of the University nor the names of its contributors
     25   1.1   briggs  *    may be used to endorse or promote products derived from this software
     26   1.1   briggs  *    without specific prior written permission.
     27   1.1   briggs  *
     28   1.1   briggs  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29   1.1   briggs  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30   1.1   briggs  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31   1.1   briggs  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32   1.1   briggs  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33   1.1   briggs  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34   1.1   briggs  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35   1.1   briggs  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36   1.1   briggs  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37   1.1   briggs  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38   1.1   briggs  * SUCH DAMAGE.
     39   1.1   briggs  */
     40   1.1   briggs /*-
     41   1.1   briggs  * Copyright (C) 1993	Allen K. Briggs, Chris P. Caputo,
     42   1.1   briggs  *			Michael L. Finch, Bradley A. Grantham, and
     43   1.1   briggs  *			Lawrence A. Kesteloot
     44   1.1   briggs  * All rights reserved.
     45   1.1   briggs  *
     46   1.1   briggs  * Redistribution and use in source and binary forms, with or without
     47   1.1   briggs  * modification, are permitted provided that the following conditions
     48   1.1   briggs  * are met:
     49   1.1   briggs  * 1. Redistributions of source code must retain the above copyright
     50   1.1   briggs  *    notice, this list of conditions and the following disclaimer.
     51   1.1   briggs  * 2. Redistributions in binary form must reproduce the above copyright
     52   1.1   briggs  *    notice, this list of conditions and the following disclaimer in the
     53   1.1   briggs  *    documentation and/or other materials provided with the distribution.
     54   1.1   briggs  * 3. All advertising materials mentioning features or use of this software
     55   1.1   briggs  *    must display the following acknowledgement:
     56   1.1   briggs  *	This product includes software developed by the Alice Group.
     57   1.1   briggs  * 4. The names of the Alice Group or any of its members may not be used
     58   1.1   briggs  *    to endorse or promote products derived from this software without
     59   1.1   briggs  *    specific prior written permission.
     60   1.1   briggs  *
     61   1.1   briggs  * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
     62   1.1   briggs  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     63   1.1   briggs  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     64   1.1   briggs  * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
     65   1.1   briggs  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     66   1.1   briggs  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     67   1.1   briggs  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     68   1.1   briggs  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     69   1.1   briggs  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     70   1.1   briggs  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     71   1.1   briggs  *
     72   1.1   briggs  */
     73   1.1   briggs /*
     74   1.1   briggs  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
     75   1.1   briggs  *
     76   1.6      cgd  *	@(#)vmparam.h	7.3 (Berkeley) 5/7/91
     77   1.1   briggs  */
     78   1.1   briggs 
     79  1.12   scottr #ifndef _MAC68K_VMPARAM_H_
     80  1.12   scottr #define	_MAC68K_VMPARAM_H_
     81  1.12   scottr 
     82   1.1   briggs /*
     83   1.7   briggs  * Machine dependent constants for mac68k -- mostly derived from hp300.
     84   1.1   briggs  */
     85  1.27  thorpej 
     86  1.27  thorpej /*
     87  1.27  thorpej  * We use 4K pages on the mac68k.  Override the PAGE_* definitions
     88  1.27  thorpej  * to be compile-time constants.
     89  1.27  thorpej  */
     90  1.27  thorpej #define	PAGE_SHIFT	12
     91  1.27  thorpej #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     92  1.27  thorpej #define	PAGE_MASK	(PAGE_SIZE - 1)
     93   1.1   briggs 
     94   1.1   briggs /*
     95   1.1   briggs  * USRTEXT is the start of the user text/data space, while USRSTACK
     96   1.1   briggs  * is the top (end) of the user stack.  LOWPAGES and HIGHPAGES are
     97   1.1   briggs  * the number of pages from the beginning of the P0 region to the
     98   1.1   briggs  * beginning of the text and from the beginning of the P1 region to the
     99   1.1   briggs  * beginning of the stack respectively.
    100   1.1   briggs  *
    101   1.7   briggs  * NOTE: HP300 uses HIGHPAGES == (0x100000/NBPG) for HP/UX compatibility.
    102   1.7   briggs  * Do we care?  Obviously not at the moment.
    103   1.1   briggs  */
    104   1.3   briggs #define	USRTEXT		8192
    105   1.1   briggs #define	USRSTACK	(-HIGHPAGES*NBPG)	/* Start of user stack */
    106   1.1   briggs #define	BTOPUSRSTACK	(0x100000-HIGHPAGES)	/* btop(USRSTACK) */
    107   1.1   briggs #define P1PAGES		0x100000
    108   1.1   briggs #define	LOWPAGES	0
    109   1.7   briggs #define HIGHPAGES	3			/* UPAGES */
    110   1.1   briggs 
    111   1.1   briggs /*
    112   1.1   briggs  * Virtual memory related constants, all in bytes
    113   1.1   briggs  */
    114   1.1   briggs #ifndef MAXTSIZ
    115   1.7   briggs #define	MAXTSIZ		(8*1024*1024)		/* max text size */
    116   1.1   briggs #endif
    117   1.1   briggs #ifndef DFLDSIZ
    118  1.20   scottr #define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
    119   1.1   briggs #endif
    120   1.1   briggs #ifndef MAXDSIZ
    121   1.7   briggs #define	MAXDSIZ		(64*1024*1024)		/* max data size */
    122   1.1   briggs #endif
    123   1.1   briggs #ifndef	DFLSSIZ
    124  1.19   scottr #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
    125   1.1   briggs #endif
    126   1.1   briggs #ifndef	MAXSSIZ
    127  1.19   scottr #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
    128   1.1   briggs #endif
    129   1.1   briggs 
    130   1.1   briggs /*
    131   1.1   briggs  * Sizes of the system and user portions of the system page table.
    132   1.1   briggs  */
    133   1.1   briggs /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
    134   1.1   briggs #define	SYSPTSIZE	(2 * NPTEPG)	/* 8mb */
    135   1.7   briggs #define	USRPTSIZE 	(1 * NPTEPG)	/* 4mb */
    136   1.1   briggs 
    137   1.1   briggs /*
    138   1.1   briggs  * PTEs for mapping user space into the kernel for phyio operations.
    139   1.1   briggs  * One page is enough to handle 4Mb of simultaneous raw IO operations.
    140   1.1   briggs  */
    141   1.1   briggs #ifndef USRIOSIZE
    142   1.1   briggs #define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
    143   1.1   briggs #endif
    144   1.1   briggs 
    145   1.1   briggs /*
    146   1.1   briggs  * PTEs for system V style shared memory.
    147   1.1   briggs  * This is basically slop for kmempt which we actually allocate (malloc) from.
    148   1.1   briggs  */
    149   1.1   briggs #ifndef SHMMAXPGS
    150   1.1   briggs #define SHMMAXPGS	1024		/* 4mb */
    151   1.1   briggs #endif
    152  1.25  tsutsui 
    153  1.25  tsutsui /*
    154  1.25  tsutsui  * The time for a process to be blocked before being very swappable.
    155  1.25  tsutsui  * This is a number of seconds which the system takes as being a non-trivial
    156  1.25  tsutsui  * amount of real time.  You probably shouldn't change this;
    157  1.25  tsutsui  * it is used in subtle ways (fractions and multiples of it are, that is, like
    158  1.25  tsutsui  * half of a ``long time'', almost a long time, etc.)
    159  1.25  tsutsui  * It is related to human patience and other factors which don't really
    160  1.25  tsutsui  * change over time.
    161  1.25  tsutsui  */
    162  1.25  tsutsui #define	MAXSLP 		20
    163   1.1   briggs 
    164   1.1   briggs /*
    165   1.1   briggs  * Mach derived constants
    166   1.1   briggs  */
    167   1.1   briggs 
    168   1.1   briggs /* user/kernel map constants */
    169  1.17   scottr #define VM_MIN_ADDRESS		((vaddr_t)0)
    170  1.17   scottr #define VM_MAXUSER_ADDRESS	((vaddr_t)(USRSTACK))
    171  1.17   scottr #define VM_MAX_ADDRESS		((vaddr_t)(0-(UPAGES*NBPG)))
    172  1.17   scottr #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
    173  1.17   scottr #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0-NBPG))
    174   1.1   briggs 
    175   1.1   briggs /* virtual sizes (bytes) for various kernel submaps */
    176  1.23    ragge #define VM_PHYS_SIZE		(USRIOSIZE*NBPG)
    177   1.1   briggs 
    178   1.1   briggs /* # of kernel PT pages (initial only, can grow dynamically) */
    179  1.21   scottr #define VM_KERNEL_PT_PAGES	((vsize_t)2)		/* XXX: SYSPTSIZE */
    180  1.12   scottr 
    181  1.12   scottr /*
    182  1.12   scottr  * Constants which control the way the VM system deals with memory segments.
    183  1.12   scottr  * Most mac68k systems have only 1 physical memory segment, but some have 2.
    184  1.14   scottr  *
    185  1.14   scottr  * On the systems that have multiple segments, specifically the IIsi and
    186  1.14   scottr  * IIci, the optimal configuration is to put the higher-density SIMMs in
    187  1.14   scottr  * bank B.  This is because the on-board video uses main memory in bank A
    188  1.14   scottr  * for the framebuffer, and a memory controller prevents access during
    189  1.14   scottr  * video refresh cycles.  Even if both banks contain the same amount of
    190  1.14   scottr  * RAM, a minimum of ~320KB will be subtracted from the amount in bank A
    191  1.14   scottr  * for the framebuffer (if on-board video is in use).
    192  1.12   scottr  */
    193  1.12   scottr #define	VM_PHYSSEG_MAX		2
    194  1.14   scottr #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BIGFIRST
    195  1.12   scottr #define	VM_PHYSSEG_NOADD
    196  1.16  thorpej 
    197  1.16  thorpej #define	VM_NFREELIST		1
    198  1.16  thorpej #define	VM_FREELIST_DEFAULT	0
    199  1.29  thorpej 
    200  1.29  thorpej #define	VM_MDPAGE_MEMBERS	/* XXX nothing yet */
    201  1.29  thorpej #define	VM_MDPAGE_INIT(pg)	/* XXX nothing yet */
    202  1.29  thorpej #define	PMAP_PHYSSEG		/* XXX for now */
    203  1.12   scottr 
    204  1.12   scottr /*
    205  1.12   scottr  * pmap-specific data stored in the vm_physmem[] array.
    206  1.12   scottr  */
    207  1.12   scottr struct pmap_physseg {
    208  1.12   scottr 	struct pv_entry *pvent;		/* pv table for this seg */
    209  1.12   scottr 	char *attrs;			/* page attributes for this seg */
    210  1.12   scottr };
    211  1.12   scottr 
    212  1.12   scottr #endif /* _MAC68K_VMPARAM_H_ */
    213