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: stable/11/sys/arm/include/vmparam.h 327658 2018-01-07 00:04:13Z 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		(256UL*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 * The virtual address the kernel is linked to run at.  For armv4/5 platforms
77 * the low-order 30 bits of this must match the low-order bits of the physical
78 * address the kernel is loaded at, so the value is most often provided as a
79 * kernel config option in the std.platform file. For armv6/7 the kernel can
80 * be loaded at any 2MB boundary, and KERNVIRTADDR can also be set to any 2MB
81 * boundary.  It is typically overridden in the std.platform file only when
82 * KERNBASE is also set to a lower address to provide more KVA.
83 */
84#ifndef KERNVIRTADDR
85#define	KERNVIRTADDR		0xc0000000
86#endif
87
88/*
89 * max number of non-contig chunks of physical RAM you can have
90 */
91
92#define	VM_PHYSSEG_MAX		32
93
94/*
95 * The physical address space may be sparsely populated on some ARM systems.
96 */
97#define	VM_PHYSSEG_SPARSE
98
99/*
100 * Create one free page pool.  Since the ARM kernel virtual address
101 * space does not include a mapping onto the machine's entire physical
102 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
103 * pool, VM_FREEPOOL_DEFAULT.
104 */
105#define	VM_NFREEPOOL		1
106#define	VM_FREEPOOL_DEFAULT	0
107#define	VM_FREEPOOL_DIRECT	0
108
109/*
110 * We need just one free list:  DEFAULT.
111 */
112#define	VM_NFREELIST		1
113#define	VM_FREELIST_DEFAULT	0
114
115/*
116 * The largest allocation size is 1MB.
117 */
118#define	VM_NFREEORDER		9
119
120/*
121 * Enable superpage reservations: 1 level.
122 */
123#ifndef	VM_NRESERVLEVEL
124#define	VM_NRESERVLEVEL		1
125#endif
126
127/*
128 * Level 0 reservations consist of 256 pages.
129 */
130#ifndef	VM_LEVEL_0_ORDER
131#define	VM_LEVEL_0_ORDER	8
132#endif
133
134#define VM_MIN_ADDRESS          (0x00001000)
135#ifndef VM_MAXUSER_ADDRESS
136#define VM_MAXUSER_ADDRESS      (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */
137#endif
138#define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
139
140#define	SHAREDPAGE		(VM_MAXUSER_ADDRESS - PAGE_SIZE)
141#define	USRSTACK		SHAREDPAGE
142
143/* initial pagein size of beginning of executable file */
144#ifndef VM_INITIAL_PAGEIN
145#define VM_INITIAL_PAGEIN       16
146#endif
147
148#ifndef VM_MIN_KERNEL_ADDRESS
149#define VM_MIN_KERNEL_ADDRESS KERNBASE
150#endif
151
152#define	VM_MAX_KERNEL_ADDRESS	(vm_max_kernel_address)
153
154/*
155 * How many physical pages per kmem arena virtual page.
156 */
157#ifndef VM_KMEM_SIZE_SCALE
158#define	VM_KMEM_SIZE_SCALE	(3)
159#endif
160
161/*
162 * Optional floor (in bytes) on the size of the kmem arena.
163 */
164#ifndef VM_KMEM_SIZE_MIN
165#define	VM_KMEM_SIZE_MIN	(12 * 1024 * 1024)
166#endif
167
168/*
169 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
170 * kernel map.
171 */
172#ifndef VM_KMEM_SIZE_MAX
173#define	VM_KMEM_SIZE_MAX	((vm_max_kernel_address - \
174    VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
175#endif
176
177extern vm_offset_t vm_max_kernel_address;
178
179#define	ZERO_REGION_SIZE	(64 * 1024)	/* 64KB */
180
181#ifndef VM_MAX_AUTOTUNE_MAXUSERS
182#define	VM_MAX_AUTOTUNE_MAXUSERS	384
183#endif
184
185#define	SFBUF
186#define	SFBUF_MAP
187
188#define	DEVMAP_MAX_VADDR	ARM_VECTORS_HIGH
189
190#endif	/* _MACHINE_VMPARAM_H_ */
191