vmparam.h revision 280712 
1/*	$NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $	*/
2
3/*-
4 * Copyright (c) 1988 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD: head/sys/arm/include/vmparam.h 280712 2015-03-26 21:13:53Z ian $
32 */
33
34#ifndef	_MACHINE_VMPARAM_H_
35#define	_MACHINE_VMPARAM_H_
36
37/*
38 * Machine dependent constants for ARM.
39 */
40
41/*
42 * Virtual memory related constants, all in bytes
43 */
44#ifndef	MAXTSIZ
45#define	MAXTSIZ		(64UL*1024*1024)	/* max text size */
46#endif
47#ifndef	DFLDSIZ
48#define	DFLDSIZ		(128UL*1024*1024)	/* initial data size limit */
49#endif
50#ifndef	MAXDSIZ
51#define	MAXDSIZ		(512UL*1024*1024)	/* max data size */
52#endif
53#ifndef	DFLSSIZ
54#define	DFLSSIZ		(2UL*1024*1024)		/* initial stack size limit */
55#endif
56#ifndef	MAXSSIZ
57#define	MAXSSIZ		(8UL*1024*1024)		/* max stack size */
58#endif
59#ifndef	SGROWSIZ
60#define	SGROWSIZ	(128UL*1024)		/* amount to grow stack */
61#endif
62
63/*
64 * Address space constants
65 */
66
67/*
68 * The line between user space and kernel space
69 * Mappings >= KERNEL_BASE are constant across all processes
70 */
71#ifndef KERNBASE
72#define	KERNBASE		0xc0000000
73#endif
74
75/*
76 * max number of non-contig chunks of physical RAM you can have
77 */
78
79#define	VM_PHYSSEG_MAX		32
80
81/*
82 * The physical address space may be sparsely populated on some ARM systems.
83 */
84#define	VM_PHYSSEG_SPARSE
85
86/*
87 * Create two free page pools.  Since the ARM kernel virtual address
88 * space does not include a mapping onto the machine's entire physical
89 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
90 * pool, VM_FREEPOOL_DEFAULT.
91 */
92#define	VM_NFREEPOOL		2
93#define	VM_FREEPOOL_CACHE	1
94#define	VM_FREEPOOL_DEFAULT	0
95#define	VM_FREEPOOL_DIRECT	0
96
97/*
98 * We need just one free list:  DEFAULT.
99 */
100#define	VM_NFREELIST		1
101#define	VM_FREELIST_DEFAULT	0
102
103/*
104 * The largest allocation size is 1MB.
105 */
106#define	VM_NFREEORDER		9
107
108/*
109 * Enable superpage reservations: 1 level.
110 */
111#ifndef	VM_NRESERVLEVEL
112#define	VM_NRESERVLEVEL		1
113#endif
114
115/*
116 * Level 0 reservations consist of 256 pages.
117 */
118#ifndef	VM_LEVEL_0_ORDER
119#define	VM_LEVEL_0_ORDER	8
120#endif
121
122#define VM_MIN_ADDRESS          (0x00001000)
123#ifndef VM_MAXUSER_ADDRESS
124#define VM_MAXUSER_ADDRESS      (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */
125#endif
126#define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
127
128#define USRSTACK        VM_MAXUSER_ADDRESS
129
130/* initial pagein size of beginning of executable file */
131#ifndef VM_INITIAL_PAGEIN
132#define VM_INITIAL_PAGEIN       16
133#endif
134
135#ifndef VM_MIN_KERNEL_ADDRESS
136#define VM_MIN_KERNEL_ADDRESS KERNBASE
137#endif
138
139#define	VM_MAX_KERNEL_ADDRESS	(vm_max_kernel_address)
140
141/*
142 * How many physical pages per kmem arena virtual page.
143 */
144#ifndef VM_KMEM_SIZE_SCALE
145#define	VM_KMEM_SIZE_SCALE	(3)
146#endif
147
148/*
149 * Optional floor (in bytes) on the size of the kmem arena.
150 */
151#ifndef VM_KMEM_SIZE_MIN
152#define	VM_KMEM_SIZE_MIN	(12 * 1024 * 1024)
153#endif
154
155/*
156 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
157 * kernel map.
158 */
159#ifndef VM_KMEM_SIZE_MAX
160#define	VM_KMEM_SIZE_MAX	((vm_max_kernel_address - \
161    VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
162#endif
163
164extern vm_offset_t vm_max_kernel_address;
165
166#define	ZERO_REGION_SIZE	(64 * 1024)	/* 64KB */
167
168#ifndef VM_MAX_AUTOTUNE_MAXUSERS
169#define	VM_MAX_AUTOTUNE_MAXUSERS	384
170#endif
171
172#define	SFBUF
173#define	SFBUF_MAP
174
175#endif	/* _MACHINE_VMPARAM_H_ */
176