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_
39 #define USRSTACK VM_MAXUSER_ADDRESS
42 #define MAXTSIZ (16*1024*1024) /* max text size */
46 #define DFLDSIZ (32*1024*1024) /* default data size */
50 #define MAXDSIZ (512*1024*1024) /* max data size */
54 #define DFLSSIZ (1*1024*1024) /* default stack size */
58 #define MAXSSIZ (32*1024*1024) /* max stack size */
62 * Size of shared memory map
65 #define SHMMAXPGS 1024
69 * The time for a process to be blocked before being very swappable.
70 * This is a number of seconds which the system takes as being a non-trivial
71 * amount of real time. You probably shouldn't change this;
72 * it is used in subtle ways (fractions and multiples of it are, that is, like
73 * half of a ``long time'', almost a long time, etc.)
74 * It is related to human patience and other factors which don't really
80 * Use the direct-mapped BAT registers for UMA small allocs. This
81 * takes pressure off the small amount of available KVA.
83 #define UMA_MD_SMALL_ALLOC
86 * Would like to have MAX addresses = 0, but this doesn't (currently) work
88 #define VM_MIN_ADDRESS ((vm_offset_t)0)
89 #define VM_MAXUSER_ADDRESS ((vm_offset_t)0x7ffff000)
90 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
91 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)(KERNEL_SR << ADDR_SR_SHFT))
92 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH - 1)
94 #define KERNBASE 0x100000 /* start of kernel virtual */
96 /* XXX max. amount of KVM to be used by buffers. */
97 #ifndef VM_MAX_KERNEL_BUF
98 #define VM_MAX_KERNEL_BUF (SEGMENT_LENGTH * 7 / 10)
101 struct pmap_physseg {
102 struct pv_entry *pvent;
106 #define VM_PHYSSEG_MAX 16 /* 1? */
107 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
108 #define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */
110 #define VM_NFREELIST 1
111 #define VM_FREELIST_DEFAULT 0
113 #ifndef VM_INITIAL_PAGEIN
114 #define VM_INITIAL_PAGEIN 16
118 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
122 #define VM_KMEM_SIZE (12 * 1024 * 1024)
125 #endif /* _MACHINE_VMPARAM_H_ */