2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * $NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $
35 #ifndef _MACHINE_VMPARAM_H_
36 #define _MACHINE_VMPARAM_H_
38 #define USRSTACK VM_MAXUSER_ADDRESS
41 #define MAXTSIZ (16*1024*1024) /* max text size */
45 #define DFLDSIZ (32*1024*1024) /* default data size */
49 #define MAXDSIZ (512*1024*1024) /* max data size */
53 #define DFLSSIZ (1*1024*1024) /* default stack size */
57 #define MAXSSIZ (32*1024*1024) /* max stack size */
61 * Size of shared memory map
64 #define SHMMAXPGS 1024
68 * The time for a process to be blocked before being very swappable.
69 * This is a number of seconds which the system takes as being a non-trivial
70 * amount of real time. You probably shouldn't change this;
71 * it is used in subtle ways (fractions and multiples of it are, that is, like
72 * half of a ``long time'', almost a long time, etc.)
73 * It is related to human patience and other factors which don't really
79 * Use the direct-mapped BAT registers for UMA small allocs. This
80 * takes pressure off the small amount of available KVA.
82 #define UMA_MD_SMALL_ALLOC
85 * Would like to have MAX addresses = 0, but this doesn't (currently) work
87 #define VM_MIN_ADDRESS ((vm_offset_t)0)
88 #define VM_MAXUSER_ADDRESS ((vm_offset_t)0x7ffff000)
89 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
90 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)(KERNEL_SR << ADDR_SR_SHFT))
91 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH - 1)
93 #define KERNBASE 0x100000 /* start of kernel virtual */
95 /* XXX max. amount of KVM to be used by buffers. */
96 #ifndef VM_MAX_KERNEL_BUF
97 #define VM_MAX_KERNEL_BUF (SEGMENT_LENGTH * 7 / 10)
100 struct pmap_physseg {
101 struct pv_entry *pvent;
105 #define VM_PHYSSEG_MAX 16 /* 1? */
108 * The physical address space is densely populated.
110 #define VM_PHYSSEG_DENSE
113 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
114 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
115 * the pool from which physical pages for small UMA objects are
118 #define VM_NFREEPOOL 3
119 #define VM_FREEPOOL_CACHE 2
120 #define VM_FREEPOOL_DEFAULT 0
121 #define VM_FREEPOOL_DIRECT 1
124 * Create one free page list.
126 #define VM_NFREELIST 1
127 #define VM_FREELIST_DEFAULT 0
130 * The largest allocation size is 4MB.
132 #define VM_NFREEORDER 11
135 * Disable superpage reservations.
137 #ifndef VM_NRESERVLEVEL
138 #define VM_NRESERVLEVEL 0
141 #ifndef VM_INITIAL_PAGEIN
142 #define VM_INITIAL_PAGEIN 16
146 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
150 #define VM_KMEM_SIZE (12 * 1024 * 1024)
153 #endif /* _MACHINE_VMPARAM_H_ */