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vmparam.h revision 1.42
      1  1.42    rmind /*	$NetBSD: vmparam.h,v 1.42 2011/02/08 20:20:18 rmind Exp $	*/
      2   1.6      cgd 
      3   1.1   briggs /*
      4  1.42    rmind  * 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  1.34      agc  *
      8  1.34      agc  * This code is derived from software contributed to Berkeley by
      9  1.34      agc  * the Systems Programming Group of the University of Utah Computer
     10  1.34      agc  * Science Department.
     11  1.34      agc  *
     12  1.34      agc  * Redistribution and use in source and binary forms, with or without
     13  1.34      agc  * modification, are permitted provided that the following conditions
     14  1.34      agc  * are met:
     15  1.34      agc  * 1. Redistributions of source code must retain the above copyright
     16  1.34      agc  *    notice, this list of conditions and the following disclaimer.
     17  1.34      agc  * 2. Redistributions in binary form must reproduce the above copyright
     18  1.34      agc  *    notice, this list of conditions and the following disclaimer in the
     19  1.34      agc  *    documentation and/or other materials provided with the distribution.
     20  1.34      agc  * 3. Neither the name of the University nor the names of its contributors
     21  1.34      agc  *    may be used to endorse or promote products derived from this software
     22  1.34      agc  *    without specific prior written permission.
     23  1.34      agc  *
     24  1.34      agc  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  1.34      agc  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  1.34      agc  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  1.34      agc  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  1.34      agc  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  1.34      agc  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  1.34      agc  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  1.34      agc  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  1.34      agc  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  1.34      agc  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  1.34      agc  * SUCH DAMAGE.
     35  1.34      agc  */
     36  1.42    rmind 
     37   1.1   briggs /*-
     38   1.1   briggs  * Copyright (C) 1993	Allen K. Briggs, Chris P. Caputo,
     39   1.1   briggs  *			Michael L. Finch, Bradley A. Grantham, and
     40   1.1   briggs  *			Lawrence A. Kesteloot
     41   1.1   briggs  * All rights reserved.
     42   1.1   briggs  *
     43   1.1   briggs  * Redistribution and use in source and binary forms, with or without
     44   1.1   briggs  * modification, are permitted provided that the following conditions
     45   1.1   briggs  * are met:
     46   1.1   briggs  * 1. Redistributions of source code must retain the above copyright
     47   1.1   briggs  *    notice, this list of conditions and the following disclaimer.
     48   1.1   briggs  * 2. Redistributions in binary form must reproduce the above copyright
     49   1.1   briggs  *    notice, this list of conditions and the following disclaimer in the
     50   1.1   briggs  *    documentation and/or other materials provided with the distribution.
     51   1.1   briggs  * 3. All advertising materials mentioning features or use of this software
     52   1.1   briggs  *    must display the following acknowledgement:
     53   1.1   briggs  *	This product includes software developed by the Alice Group.
     54   1.1   briggs  * 4. The names of the Alice Group or any of its members may not be used
     55   1.1   briggs  *    to endorse or promote products derived from this software without
     56   1.1   briggs  *    specific prior written permission.
     57   1.1   briggs  *
     58   1.1   briggs  * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
     59   1.1   briggs  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     60   1.1   briggs  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     61   1.1   briggs  * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
     62   1.1   briggs  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     63   1.1   briggs  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     64   1.1   briggs  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     65   1.1   briggs  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     66   1.1   briggs  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     67   1.1   briggs  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     68   1.1   briggs  *
     69   1.1   briggs  */
     70   1.1   briggs /*
     71   1.1   briggs  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
     72   1.1   briggs  *
     73   1.6      cgd  *	@(#)vmparam.h	7.3 (Berkeley) 5/7/91
     74   1.1   briggs  */
     75   1.1   briggs 
     76  1.12   scottr #ifndef _MAC68K_VMPARAM_H_
     77  1.12   scottr #define	_MAC68K_VMPARAM_H_
     78  1.12   scottr 
     79   1.1   briggs /*
     80   1.7   briggs  * Machine dependent constants for mac68k -- mostly derived from hp300.
     81   1.1   briggs  */
     82  1.27  thorpej 
     83  1.27  thorpej /*
     84  1.27  thorpej  * We use 4K pages on the mac68k.  Override the PAGE_* definitions
     85  1.27  thorpej  * to be compile-time constants.
     86  1.27  thorpej  */
     87  1.40  tsutsui #define	PAGE_SHIFT	PGSHIFT
     88  1.27  thorpej #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     89  1.27  thorpej #define	PAGE_MASK	(PAGE_SIZE - 1)
     90   1.1   briggs 
     91   1.1   briggs /*
     92  1.32  thorpej  * USRSTACK is the top (end) of the user stack.
     93   1.1   briggs  *
     94  1.33  thorpej  * NOTE: HP300 uses HIGHPAGES == (0x100000/PAGE_SIZE) for HP/UX compatibility.
     95   1.7   briggs  * Do we care?  Obviously not at the moment.
     96   1.1   briggs  */
     97  1.33  thorpej #define	USRSTACK	(-HIGHPAGES*PAGE_SIZE)	/* Start of user stack */
     98   1.1   briggs #define	BTOPUSRSTACK	(0x100000-HIGHPAGES)	/* btop(USRSTACK) */
     99   1.1   briggs #define P1PAGES		0x100000
    100   1.7   briggs #define HIGHPAGES	3			/* UPAGES */
    101   1.1   briggs 
    102   1.1   briggs /*
    103   1.1   briggs  * Virtual memory related constants, all in bytes
    104   1.1   briggs  */
    105   1.1   briggs #ifndef MAXTSIZ
    106   1.7   briggs #define	MAXTSIZ		(8*1024*1024)		/* max text size */
    107   1.1   briggs #endif
    108   1.1   briggs #ifndef DFLDSIZ
    109  1.20   scottr #define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
    110   1.1   briggs #endif
    111   1.1   briggs #ifndef MAXDSIZ
    112   1.7   briggs #define	MAXDSIZ		(64*1024*1024)		/* max data size */
    113   1.1   briggs #endif
    114   1.1   briggs #ifndef	DFLSSIZ
    115  1.19   scottr #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
    116   1.1   briggs #endif
    117   1.1   briggs #ifndef	MAXSSIZ
    118  1.19   scottr #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
    119   1.1   briggs #endif
    120   1.1   briggs 
    121   1.1   briggs /*
    122   1.1   briggs  * Sizes of the system and user portions of the system page table.
    123   1.1   briggs  */
    124   1.1   briggs /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
    125   1.1   briggs #define	SYSPTSIZE	(2 * NPTEPG)	/* 8mb */
    126   1.7   briggs #define	USRPTSIZE 	(1 * NPTEPG)	/* 4mb */
    127   1.1   briggs 
    128   1.1   briggs /*
    129   1.1   briggs  * PTEs for mapping user space into the kernel for phyio operations.
    130   1.1   briggs  * One page is enough to handle 4Mb of simultaneous raw IO operations.
    131   1.1   briggs  */
    132   1.1   briggs #ifndef USRIOSIZE
    133   1.1   briggs #define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
    134   1.1   briggs #endif
    135   1.1   briggs 
    136   1.1   briggs /*
    137   1.1   briggs  * Mach derived constants
    138   1.1   briggs  */
    139   1.1   briggs 
    140   1.1   briggs /* user/kernel map constants */
    141  1.17   scottr #define VM_MIN_ADDRESS		((vaddr_t)0)
    142  1.17   scottr #define VM_MAXUSER_ADDRESS	((vaddr_t)(USRSTACK))
    143  1.33  thorpej #define VM_MAX_ADDRESS		((vaddr_t)(0-(UPAGES*PAGE_SIZE)))
    144  1.17   scottr #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
    145  1.37  tsutsui #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0-PAGE_SIZE*NPTEPG))
    146   1.1   briggs 
    147   1.1   briggs /* virtual sizes (bytes) for various kernel submaps */
    148  1.33  thorpej #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
    149   1.1   briggs 
    150   1.1   briggs /* # of kernel PT pages (initial only, can grow dynamically) */
    151  1.21   scottr #define VM_KERNEL_PT_PAGES	((vsize_t)2)		/* XXX: SYSPTSIZE */
    152  1.12   scottr 
    153  1.12   scottr /*
    154  1.12   scottr  * Constants which control the way the VM system deals with memory segments.
    155  1.12   scottr  * Most mac68k systems have only 1 physical memory segment, but some have 2.
    156  1.14   scottr  *
    157  1.14   scottr  * On the systems that have multiple segments, specifically the IIsi and
    158  1.14   scottr  * IIci, the optimal configuration is to put the higher-density SIMMs in
    159  1.14   scottr  * bank B.  This is because the on-board video uses main memory in bank A
    160  1.14   scottr  * for the framebuffer, and a memory controller prevents access during
    161  1.14   scottr  * video refresh cycles.  Even if both banks contain the same amount of
    162  1.14   scottr  * RAM, a minimum of ~320KB will be subtracted from the amount in bank A
    163  1.14   scottr  * for the framebuffer (if on-board video is in use).
    164  1.12   scottr  */
    165  1.12   scottr #define	VM_PHYSSEG_MAX		2
    166  1.14   scottr #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BIGFIRST
    167  1.16  thorpej 
    168  1.16  thorpej #define	VM_NFREELIST		1
    169  1.16  thorpej #define	VM_FREELIST_DEFAULT	0
    170  1.29  thorpej 
    171  1.30  thorpej #define	__HAVE_PMAP_PHYSSEG
    172  1.12   scottr 
    173  1.12   scottr /*
    174  1.12   scottr  * pmap-specific data stored in the vm_physmem[] array.
    175  1.12   scottr  */
    176  1.12   scottr struct pmap_physseg {
    177  1.39  thorpej 	struct pv_header *pvheader;	/* pv table for this seg */
    178  1.12   scottr };
    179  1.12   scottr 
    180  1.12   scottr #endif /* _MAC68K_VMPARAM_H_ */
    181