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vmparam.h revision 1.19 
      1 /*	$NetBSD: vmparam.h,v 1.19 2003/04/02 07:35:56 thorpej 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  *
     42  *	@(#)vmparam.h	7.3 (Berkeley) 5/7/91
     43  */
     44 
     45 #ifndef _MACHINE_VMPARAM_H_
     46 #define _MACHINE_VMPARAM_H_
     47 
     48 #include <machine/pte.h>
     49 
     50 /*
     51  * Machine dependent constants for HP300
     52  */
     53 
     54 /*
     55  * We use 8K pages on the Atari.  Override the PAGE_* definitions
     56  * to be compile-time constants.
     57  */
     58 #define	PAGE_SHIFT	13
     59 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     60 #define	PAGE_MASK	(PAGE_SIZE - 1)
     61 
     62 /*
     63  * USRSTACK is the top (end) of the user stack.
     64  *
     65  * These are a mixture of i386, sun3 and hp settings..
     66  */
     67 
     68 /* Sun settings. Still hope, that I might get sun3 binaries to work... */
     69 #define	USRSTACK	0x0E000000
     70 #define KUSER_AREA	(-UPAGES*PAGE_SIZE)
     71 /*
     72  * Virtual memory related constants, all in bytes
     73  */
     74 
     75 #ifndef MAXTSIZ
     76 #define	MAXTSIZ		(6*1024*1024)		/* max text size */
     77 #endif
     78 #ifndef DFLDSIZ
     79 #define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
     80 #endif
     81 #ifndef MAXDSIZ
     82 #define	MAXDSIZ		(64*1024*1024)		/* max data size */
     83 #endif
     84 #ifndef	DFLSSIZ
     85 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
     86 #endif
     87 #ifndef	MAXSSIZ
     88 #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
     89 #endif
     90 
     91 /*
     92  * Sizes of the system and user portions of the system page table.
     93  */
     94 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
     95 #define	SYSPTSIZE	(2 * NPTEPG)	/* 16mb */
     96 #define	USRPTSIZE 	(1 * NPTEPG)	/* 16mb */
     97 
     98 /*
     99  * PTEs for mapping user space into the kernel for phyio operations.
    100  * One page is enough to handle 16Mb of simultaneous raw IO operations.
    101  */
    102 #ifndef USRIOSIZE
    103 #define USRIOSIZE	(1 * NPTEPG)	/* 16mb */
    104 #endif
    105 
    106 /*
    107  * PTEs for system V style shared memory.
    108  * This is basically slop for kmempt which we actually allocate (malloc) from.
    109  */
    110 #ifndef SHMMAXPGS
    111 #define SHMMAXPGS	(1 * NPTEPG)	/* 16mb */
    112 #endif
    113 
    114 /*
    115  * user/kernel map constants
    116  */
    117 #define VM_MIN_ADDRESS		((vaddr_t)0)
    118 #define VM_MAX_ADDRESS		((vaddr_t)(USRSTACK))
    119 #define VM_MAXUSER_ADDRESS	((vaddr_t)(VM_MAX_ADDRESS))
    120 #define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
    121 #define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0-PAGE_SIZE))
    122 
    123 /*
    124  * virtual sizes (bytes) for various kernel submaps
    125  */
    126 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
    127 
    128 /*
    129  * Our bootloader currently passes up to 2 segments (ST and TT ram).
    130  */
    131 #define VM_PHYSSEG_MAX		(2)
    132 #define VM_PHYSSEG_STRAT	VM_PSTRAT_RANDOM
    133 #define VM_PHYSSEG_NOADD
    134 
    135 #define	VM_NFREELIST		1
    136 #define	VM_FREELIST_DEFAULT	0
    137 
    138 #define	__HAVE_PMAP_PHYSSEG
    139 
    140 /*
    141  * pmap-specific data stored in the vm_physmem[] array.
    142  */
    143 struct pmap_physseg {
    144 	struct pv_entry *pvent;         /* pv table for this seg */
    145 	char *attrs;                    /* page attributes for this seg */
    146 };
    147 
    148 
    149 /*
    150  * number of kernel PT pages (initial only, can grow dynamically)
    151  */
    152 #define VM_KERNEL_PT_PAGES	((vsize_t)4)		/* XXX: SYSPTSIZE */
    153 #endif /* !_MACHINE_VMPARAM_H_ */
    154