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vmparam.h revision 1.7 
      1 /*	$NetBSD: vmparam.h,v 1.7 2005/02/11 11:01:10 ws Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * William Jolitz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	@(#)vmparam.h	5.9 (Berkeley) 5/12/91
     35  */
     36 
     37 #ifndef _VMPARAM_H_
     38 #define _VMPARAM_H_
     39 
     40 #include <sys/tree.h>
     41 
     42 /*
     43  * Machine dependent constants for 386.
     44  */
     45 
     46 /*
     47  * Page size on the amd64 s not variable in the traditional sense.
     48  * We override the PAGE_* definitions to compile-time constants.
     49  */
     50 #define	PAGE_SHIFT	12
     51 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
     52 #define	PAGE_MASK	(PAGE_SIZE - 1)
     53 
     54 /*
     55  * USRSTACK is the top (end) of the user stack. Immediately above the
     56  * user stack resides the user structure, which is UPAGES long and contains
     57  * the kernel stack.
     58  *
     59  * Immediately after the user structure is the page table map, and then
     60  * kernal address space.
     61  */
     62 #define	USRSTACK	VM_MAXUSER_ADDRESS
     63 
     64 #define USRSTACK32	VM_MAXUSER_ADDRESS32
     65 
     66 /*
     67  * Virtual memory related constants, all in bytes
     68  */
     69 #define	MAXTSIZ		(64*1024*1024)		/* max text size */
     70 #ifndef DFLDSIZ
     71 #define	DFLDSIZ		(256*1024*1024)		/* initial data size limit */
     72 #endif
     73 #ifndef MAXDSIZ
     74 #define	MAXDSIZ		(8L*1024*1024*1024)	/* max data size */
     75 #endif
     76 #ifndef	DFLSSIZ
     77 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
     78 #endif
     79 #ifndef	MAXSSIZ
     80 #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
     81 #endif
     82 
     83 /*
     84  * Size of shared memory map
     85  */
     86 #ifndef SHMMAXPGS
     87 #define SHMMAXPGS	2048
     88 #endif
     89 
     90 /*
     91  * Size of User Raw I/O map
     92  */
     93 #define	USRIOSIZE 	300
     94 
     95 /*
     96  * Mach derived constants
     97  */
     98 
     99 /* user/kernel map constants */
    100 #define VM_MIN_ADDRESS		0
    101 #define VM_MAXUSER_ADDRESS	0x00007f8000000000
    102 #define VM_MAX_ADDRESS		0x00007fbfdfeff000
    103 #define VM_MIN_KERNEL_ADDRESS	0xffff800000000000
    104 #define VM_MAX_KERNEL_ADDRESS	0xffff800100000000
    105 
    106 #define VM_MAXUSER_ADDRESS32	0xfffff000
    107 
    108 /*
    109  * XXXfvdl we have plenty of KVM now, remove this.
    110  */
    111 #ifndef VM_MAX_KERNEL_BUF
    112 #define VM_MAX_KERNEL_BUF	(384 * 1024 * 1024)
    113 #endif
    114 
    115 /* virtual sizes (bytes) for various kernel submaps */
    116 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
    117 
    118 #define VM_PHYSSEG_MAX		5	/* 1 "hole" + 4 free lists */
    119 #define VM_PHYSSEG_STRAT	VM_PSTRAT_BIGFIRST
    120 #define VM_PHYSSEG_NOADD		/* can't add RAM after vm_mem_init */
    121 
    122 #define	VM_NFREELIST		2
    123 #define	VM_FREELIST_DEFAULT	0
    124 #define	VM_FREELIST_FIRST16	1
    125 
    126 #define __HAVE_PMAP_PHYSSEG
    127 
    128 #define __HAVE_VM_PAGE_MD
    129 #define VM_MDPAGE_INIT(pg)                                      \
    130         memset(&(pg)->mdpage, 0, sizeof((pg)->mdpage));         \
    131         simple_lock_init(&(pg)->mdpage.mp_pvhead.pvh_lock);     \
    132         SPLAY_INIT(&(pg)->mdpage.mp_pvhead.pvh_root);
    133 
    134 struct pv_entry;
    135 
    136 struct pv_head {
    137         struct simplelock pvh_lock;     /* locks every pv in this tree */
    138         SPLAY_HEAD(pvtree, pv_entry) pvh_root;
    139                                         /* head of tree (locked by pvh_lock) */
    140 };
    141 
    142 struct vm_page_md {
    143         struct pv_head mp_pvhead;
    144         int mp_attrs;
    145 };
    146 
    147 /*
    148  * pmap specific data stored in the vm_physmem[] array
    149  */
    150 struct pmap_physseg {
    151 	struct pv_head *pvhead;		/* pv_head array */
    152 	unsigned char *attrs;		/* attrs array */
    153 };
    154 
    155 #endif /* _VMPARAM_H_ */
    156