vmparam.h revision 170816 
1/*-
2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
19 *
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.
30 *
31 *	$NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $
32 * $FreeBSD: head/sys/powerpc/include/vmparam.h 170816 2007-06-16 04:57:06Z alc $
33 */
34
35#ifndef _MACHINE_VMPARAM_H_
36#define	_MACHINE_VMPARAM_H_
37
38#define	USRSTACK	VM_MAXUSER_ADDRESS
39
40#ifndef	MAXTSIZ
41#define	MAXTSIZ		(16*1024*1024)		/* max text size */
42#endif
43
44#ifndef	DFLDSIZ
45#define	DFLDSIZ		(32*1024*1024)		/* default data size */
46#endif
47
48#ifndef	MAXDSIZ
49#define	MAXDSIZ		(512*1024*1024)		/* max data size */
50#endif
51
52#ifndef	DFLSSIZ
53#define	DFLSSIZ		(1*1024*1024)		/* default stack size */
54#endif
55
56#ifndef	MAXSSIZ
57#define	MAXSSIZ		(32*1024*1024)		/* max stack size */
58#endif
59
60/*
61 * Size of shared memory map
62 */
63#ifndef	SHMMAXPGS
64#define	SHMMAXPGS	1024
65#endif
66
67/*
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
74 * change over time.
75 */
76#define	MAXSLP 		20
77
78/*
79 * Use the direct-mapped BAT registers for UMA small allocs. This
80 * takes pressure off the small amount of available KVA.
81 */
82#define UMA_MD_SMALL_ALLOC
83
84/*
85 * Would like to have MAX addresses = 0, but this doesn't (currently) work
86 */
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)
92
93#define	KERNBASE	0x100000	/* start of kernel virtual */
94
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)
98#endif
99
100struct pmap_physseg {
101	struct pv_entry *pvent;
102	char *attrs;
103};
104
105#define	VM_PHYSSEG_MAX		16	/* 1? */
106
107/*
108 * The physical address space is densely populated.
109 */
110#define	VM_PHYSSEG_DENSE
111
112/*
113 * Create two 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
116 * allocated.
117 */
118#define	VM_NFREEPOOL		2
119#define	VM_FREEPOOL_DEFAULT	0
120#define	VM_FREEPOOL_DIRECT	1
121
122/*
123 * Create one free page list.
124 */
125#define	VM_NFREELIST		1
126#define	VM_FREELIST_DEFAULT	0
127
128/*
129 * The largest allocation size is 4MB.
130 */
131#define	VM_NFREEORDER		11
132
133#ifndef VM_INITIAL_PAGEIN
134#define	VM_INITIAL_PAGEIN	16
135#endif
136
137#ifndef SGROWSIZ
138#define	SGROWSIZ	(128UL*1024)		/* amount to grow stack */
139#endif
140
141#ifndef VM_KMEM_SIZE
142#define	VM_KMEM_SIZE		(12 * 1024 * 1024)
143#endif
144
145#endif /* _MACHINE_VMPARAM_H_ */
146