1 /* $OpenBSD: vmparam.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
2 /* $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd Exp $ */
5 * Copyright (c) 1988 University of Utah.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
10 * the Systems Programming Group of the University of Utah Computer
11 * Science Department and Ralph Campbell.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * from: Utah Hdr: vmparam.h 1.16 91/01/18
38 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94
39 * JNPR: vmparam.h,v 1.3.2.1 2007/09/10 06:01:28 girish
43 #ifndef _MACHINE_VMPARAM_H_
44 #define _MACHINE_VMPARAM_H_
47 * Machine dependent constants mips processors.
51 * Virtual memory related constants, all in bytes
54 #define MAXTSIZ (128UL*1024*1024) /* max text size */
57 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
60 #define MAXDSIZ (1*1024UL*1024*1024) /* max data size */
63 #define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
66 #define MAXSSIZ (64UL*1024*1024) /* max stack size */
69 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
73 * Mach derived constants
76 /* user/kernel map constants */
77 #define VM_MIN_ADDRESS ((vm_offset_t)0x00000000)
78 #define VM_MAX_ADDRESS ((vm_offset_t)(intptr_t)(int32_t)0xffffffff)
80 #define VM_MINUSER_ADDRESS ((vm_offset_t)0x00000000)
83 #define VM_MAXUSER_ADDRESS (VM_MINUSER_ADDRESS + (NPDEPG * NBSEG))
84 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xc000000000000000)
85 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + (NPDEPG * NBSEG))
87 #define VM_MAXUSER_ADDRESS ((vm_offset_t)0x80000000)
88 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xC0000000)
89 #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFC000)
92 #define KERNBASE ((vm_offset_t)(intptr_t)(int32_t)0x80000000)
94 * USRSTACK needs to start a little below 0x8000000 because the R8000
95 * and some QED CPUs perform some virtual address checks before the
96 * offset is calculated.
98 #define USRSTACK (VM_MAXUSER_ADDRESS - PAGE_SIZE)
100 #define FREEBSD32_USRSTACK (((vm_offset_t)0x80000000) - PAGE_SIZE)
104 * Only one memory domain.
111 * Disable superpage reservations. (not sure if this is right
112 * I copied it from ARM)
114 #ifndef VM_NRESERVLEVEL
115 #define VM_NRESERVLEVEL 0
118 /* virtual sizes (bytes) for various kernel submaps */
120 #define VM_KMEM_SIZE (12 * 1024 * 1024)
124 * How many physical pages per KVA page allocated.
125 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX)
126 * is the total KVA space allocated for kmem_map.
128 #ifndef VM_KMEM_SIZE_SCALE
129 #define VM_KMEM_SIZE_SCALE (3)
133 * Ceiling on the amount of kmem_map KVA space: 40% of the entire KVA space.
135 #ifndef VM_KMEM_SIZE_MAX
136 #define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \
137 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
140 /* initial pagein size of beginning of executable file */
141 #ifndef VM_INITIAL_PAGEIN
142 #define VM_INITIAL_PAGEIN 16
145 #define UMA_MD_SMALL_ALLOC
148 * max number of non-contig chunks of physical RAM you can have
150 #define VM_PHYSSEG_MAX 32
153 * The physical address space is sparsely populated.
155 #define VM_PHYSSEG_SPARSE
158 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
159 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
160 * the pool from which physical pages for small UMA objects are
163 #define VM_NFREEPOOL 3
164 #define VM_FREEPOOL_CACHE 2
165 #define VM_FREEPOOL_DEFAULT 0
166 #define VM_FREEPOOL_DIRECT 1
169 * we support 2 free lists:
171 * - DEFAULT for direct mapped (KSEG0) pages.
172 * Note: This usage of DEFAULT may be misleading because we use
173 * DEFAULT for allocating direct mapped pages. The normal page
174 * allocations use HIGHMEM if available, and then DEFAULT.
175 * - HIGHMEM for other pages
178 #define VM_NFREELIST 1
179 #define VM_FREELIST_DEFAULT 0
180 #define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT
182 #define VM_NFREELIST 2
183 #define VM_FREELIST_DEFAULT 1
184 #define VM_FREELIST_HIGHMEM 0
185 #define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT
186 #define VM_HIGHMEM_ADDRESS ((vm_paddr_t)0x20000000)
190 * The largest allocation size is 1MB.
192 #define VM_NFREEORDER 9
194 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
196 #endif /* !_MACHINE_VMPARAM_H_ */