1 /* $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $ */
4 * Copyright (c) 1988 The Regents of the University of California.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
34 #ifndef _MACHINE_VMPARAM_H_
35 #define _MACHINE_VMPARAM_H_
38 * Machine dependent constants for ARM.
42 * Virtual memory related constants, all in bytes
45 #define MAXTSIZ (64UL*1024*1024) /* max text size */
48 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
51 #define MAXDSIZ (512UL*1024*1024) /* max data size */
54 #define DFLSSIZ (2UL*1024*1024) /* initial stack size limit */
57 #define MAXSSIZ (8UL*1024*1024) /* max stack size */
60 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
64 * Address space constants
68 * The line between user space and kernel space
69 * Mappings >= KERNEL_BASE are constant across all processes
72 #define KERNBASE 0xc0000000
76 * max number of non-contig chunks of physical RAM you can have
79 #define VM_PHYSSEG_MAX 32
82 * The physical address space may be sparsely populated on some ARM systems.
84 #define VM_PHYSSEG_SPARSE
87 * Create one free page pool. 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.
92 #define VM_NFREEPOOL 1
93 #define VM_FREEPOOL_DEFAULT 0
94 #define VM_FREEPOOL_DIRECT 0
97 * We need just one free list: DEFAULT.
99 #define VM_NFREELIST 1
100 #define VM_FREELIST_DEFAULT 0
103 * The largest allocation size is 1MB.
105 #define VM_NFREEORDER 9
108 * Enable superpage reservations: 1 level.
110 #ifndef VM_NRESERVLEVEL
111 #define VM_NRESERVLEVEL 1
115 * Level 0 reservations consist of 256 pages.
117 #ifndef VM_LEVEL_0_ORDER
118 #define VM_LEVEL_0_ORDER 8
121 #define VM_MIN_ADDRESS (0x00001000)
122 #ifndef VM_MAXUSER_ADDRESS
123 #define VM_MAXUSER_ADDRESS (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */
125 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
127 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
128 #define USRSTACK SHAREDPAGE
130 /* initial pagein size of beginning of executable file */
131 #ifndef VM_INITIAL_PAGEIN
132 #define VM_INITIAL_PAGEIN 16
135 #ifndef VM_MIN_KERNEL_ADDRESS
136 #define VM_MIN_KERNEL_ADDRESS KERNBASE
139 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address)
142 * How many physical pages per kmem arena virtual page.
144 #ifndef VM_KMEM_SIZE_SCALE
145 #define VM_KMEM_SIZE_SCALE (3)
149 * Optional floor (in bytes) on the size of the kmem arena.
151 #ifndef VM_KMEM_SIZE_MIN
152 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
156 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
159 #ifndef VM_KMEM_SIZE_MAX
160 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \
161 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
164 extern vm_offset_t vm_max_kernel_address;
166 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
168 #ifndef VM_MAX_AUTOTUNE_MAXUSERS
169 #define VM_MAX_AUTOTUNE_MAXUSERS 384
175 #define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH
177 #endif /* _MACHINE_VMPARAM_H_ */