vmparam.h revision 1.29 1 1.29 thorpej /* $NetBSD: vmparam.h,v 1.29 2001/04/29 22:44:35 thorpej Exp $ */
2 1.6 cgd
3 1.1 briggs /*
4 1.1 briggs * Copyright (c) 1988 University of Utah.
5 1.1 briggs * Copyright (c) 1982, 1990 The Regents of the University of California.
6 1.1 briggs * All rights reserved.
7 1.1 briggs *
8 1.1 briggs * This code is derived from software contributed to Berkeley by
9 1.1 briggs * the Systems Programming Group of the University of Utah Computer
10 1.1 briggs * Science Department.
11 1.1 briggs *
12 1.1 briggs * Redistribution and use in source and binary forms, with or without
13 1.1 briggs * modification, are permitted provided that the following conditions
14 1.1 briggs * are met:
15 1.1 briggs * 1. Redistributions of source code must retain the above copyright
16 1.1 briggs * notice, this list of conditions and the following disclaimer.
17 1.1 briggs * 2. Redistributions in binary form must reproduce the above copyright
18 1.1 briggs * notice, this list of conditions and the following disclaimer in the
19 1.1 briggs * documentation and/or other materials provided with the distribution.
20 1.1 briggs * 3. All advertising materials mentioning features or use of this software
21 1.1 briggs * must display the following acknowledgement:
22 1.1 briggs * This product includes software developed by the University of
23 1.1 briggs * California, Berkeley and its contributors.
24 1.1 briggs * 4. Neither the name of the University nor the names of its contributors
25 1.1 briggs * may be used to endorse or promote products derived from this software
26 1.1 briggs * without specific prior written permission.
27 1.1 briggs *
28 1.1 briggs * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 1.1 briggs * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 1.1 briggs * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 1.1 briggs * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 1.1 briggs * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 1.1 briggs * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 1.1 briggs * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 1.1 briggs * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 1.1 briggs * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 1.1 briggs * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 1.1 briggs * SUCH DAMAGE.
39 1.1 briggs */
40 1.1 briggs /*-
41 1.1 briggs * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
42 1.1 briggs * Michael L. Finch, Bradley A. Grantham, and
43 1.1 briggs * Lawrence A. Kesteloot
44 1.1 briggs * All rights reserved.
45 1.1 briggs *
46 1.1 briggs * Redistribution and use in source and binary forms, with or without
47 1.1 briggs * modification, are permitted provided that the following conditions
48 1.1 briggs * are met:
49 1.1 briggs * 1. Redistributions of source code must retain the above copyright
50 1.1 briggs * notice, this list of conditions and the following disclaimer.
51 1.1 briggs * 2. Redistributions in binary form must reproduce the above copyright
52 1.1 briggs * notice, this list of conditions and the following disclaimer in the
53 1.1 briggs * documentation and/or other materials provided with the distribution.
54 1.1 briggs * 3. All advertising materials mentioning features or use of this software
55 1.1 briggs * must display the following acknowledgement:
56 1.1 briggs * This product includes software developed by the Alice Group.
57 1.1 briggs * 4. The names of the Alice Group or any of its members may not be used
58 1.1 briggs * to endorse or promote products derived from this software without
59 1.1 briggs * specific prior written permission.
60 1.1 briggs *
61 1.1 briggs * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
62 1.1 briggs * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
63 1.1 briggs * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
64 1.1 briggs * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
65 1.1 briggs * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
66 1.1 briggs * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
67 1.1 briggs * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
68 1.1 briggs * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
69 1.1 briggs * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
70 1.1 briggs * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
71 1.1 briggs *
72 1.1 briggs */
73 1.1 briggs /*
74 1.1 briggs * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
75 1.1 briggs *
76 1.6 cgd * @(#)vmparam.h 7.3 (Berkeley) 5/7/91
77 1.1 briggs */
78 1.1 briggs
79 1.12 scottr #ifndef _MAC68K_VMPARAM_H_
80 1.12 scottr #define _MAC68K_VMPARAM_H_
81 1.12 scottr
82 1.1 briggs /*
83 1.7 briggs * Machine dependent constants for mac68k -- mostly derived from hp300.
84 1.1 briggs */
85 1.27 thorpej
86 1.27 thorpej /*
87 1.27 thorpej * We use 4K pages on the mac68k. Override the PAGE_* definitions
88 1.27 thorpej * to be compile-time constants.
89 1.27 thorpej */
90 1.27 thorpej #define PAGE_SHIFT 12
91 1.27 thorpej #define PAGE_SIZE (1 << PAGE_SHIFT)
92 1.27 thorpej #define PAGE_MASK (PAGE_SIZE - 1)
93 1.1 briggs
94 1.1 briggs /*
95 1.1 briggs * USRTEXT is the start of the user text/data space, while USRSTACK
96 1.1 briggs * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are
97 1.1 briggs * the number of pages from the beginning of the P0 region to the
98 1.1 briggs * beginning of the text and from the beginning of the P1 region to the
99 1.1 briggs * beginning of the stack respectively.
100 1.1 briggs *
101 1.7 briggs * NOTE: HP300 uses HIGHPAGES == (0x100000/NBPG) for HP/UX compatibility.
102 1.7 briggs * Do we care? Obviously not at the moment.
103 1.1 briggs */
104 1.3 briggs #define USRTEXT 8192
105 1.1 briggs #define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */
106 1.1 briggs #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */
107 1.1 briggs #define P1PAGES 0x100000
108 1.1 briggs #define LOWPAGES 0
109 1.7 briggs #define HIGHPAGES 3 /* UPAGES */
110 1.1 briggs
111 1.1 briggs /*
112 1.1 briggs * Virtual memory related constants, all in bytes
113 1.1 briggs */
114 1.1 briggs #ifndef MAXTSIZ
115 1.7 briggs #define MAXTSIZ (8*1024*1024) /* max text size */
116 1.1 briggs #endif
117 1.1 briggs #ifndef DFLDSIZ
118 1.20 scottr #define DFLDSIZ (32*1024*1024) /* initial data size limit */
119 1.1 briggs #endif
120 1.1 briggs #ifndef MAXDSIZ
121 1.7 briggs #define MAXDSIZ (64*1024*1024) /* max data size */
122 1.1 briggs #endif
123 1.1 briggs #ifndef DFLSSIZ
124 1.19 scottr #define DFLSSIZ (2*1024*1024) /* initial stack size limit */
125 1.1 briggs #endif
126 1.1 briggs #ifndef MAXSSIZ
127 1.19 scottr #define MAXSSIZ (32*1024*1024) /* max stack size */
128 1.1 briggs #endif
129 1.1 briggs
130 1.1 briggs /*
131 1.1 briggs * Sizes of the system and user portions of the system page table.
132 1.1 briggs */
133 1.1 briggs /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
134 1.1 briggs #define SYSPTSIZE (2 * NPTEPG) /* 8mb */
135 1.7 briggs #define USRPTSIZE (1 * NPTEPG) /* 4mb */
136 1.1 briggs
137 1.1 briggs /*
138 1.1 briggs * PTEs for mapping user space into the kernel for phyio operations.
139 1.1 briggs * One page is enough to handle 4Mb of simultaneous raw IO operations.
140 1.1 briggs */
141 1.1 briggs #ifndef USRIOSIZE
142 1.1 briggs #define USRIOSIZE (1 * NPTEPG) /* 4mb */
143 1.1 briggs #endif
144 1.1 briggs
145 1.1 briggs /*
146 1.1 briggs * PTEs for system V style shared memory.
147 1.1 briggs * This is basically slop for kmempt which we actually allocate (malloc) from.
148 1.1 briggs */
149 1.1 briggs #ifndef SHMMAXPGS
150 1.1 briggs #define SHMMAXPGS 1024 /* 4mb */
151 1.1 briggs #endif
152 1.25 tsutsui
153 1.25 tsutsui /*
154 1.25 tsutsui * The time for a process to be blocked before being very swappable.
155 1.25 tsutsui * This is a number of seconds which the system takes as being a non-trivial
156 1.25 tsutsui * amount of real time. You probably shouldn't change this;
157 1.25 tsutsui * it is used in subtle ways (fractions and multiples of it are, that is, like
158 1.25 tsutsui * half of a ``long time'', almost a long time, etc.)
159 1.25 tsutsui * It is related to human patience and other factors which don't really
160 1.25 tsutsui * change over time.
161 1.25 tsutsui */
162 1.25 tsutsui #define MAXSLP 20
163 1.1 briggs
164 1.1 briggs /*
165 1.1 briggs * Mach derived constants
166 1.1 briggs */
167 1.1 briggs
168 1.1 briggs /* user/kernel map constants */
169 1.17 scottr #define VM_MIN_ADDRESS ((vaddr_t)0)
170 1.17 scottr #define VM_MAXUSER_ADDRESS ((vaddr_t)(USRSTACK))
171 1.17 scottr #define VM_MAX_ADDRESS ((vaddr_t)(0-(UPAGES*NBPG)))
172 1.17 scottr #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
173 1.17 scottr #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG))
174 1.1 briggs
175 1.1 briggs /* virtual sizes (bytes) for various kernel submaps */
176 1.23 ragge #define VM_PHYS_SIZE (USRIOSIZE*NBPG)
177 1.1 briggs
178 1.1 briggs /* # of kernel PT pages (initial only, can grow dynamically) */
179 1.21 scottr #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */
180 1.12 scottr
181 1.12 scottr /*
182 1.12 scottr * Constants which control the way the VM system deals with memory segments.
183 1.12 scottr * Most mac68k systems have only 1 physical memory segment, but some have 2.
184 1.14 scottr *
185 1.14 scottr * On the systems that have multiple segments, specifically the IIsi and
186 1.14 scottr * IIci, the optimal configuration is to put the higher-density SIMMs in
187 1.14 scottr * bank B. This is because the on-board video uses main memory in bank A
188 1.14 scottr * for the framebuffer, and a memory controller prevents access during
189 1.14 scottr * video refresh cycles. Even if both banks contain the same amount of
190 1.14 scottr * RAM, a minimum of ~320KB will be subtracted from the amount in bank A
191 1.14 scottr * for the framebuffer (if on-board video is in use).
192 1.12 scottr */
193 1.12 scottr #define VM_PHYSSEG_MAX 2
194 1.14 scottr #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
195 1.12 scottr #define VM_PHYSSEG_NOADD
196 1.16 thorpej
197 1.16 thorpej #define VM_NFREELIST 1
198 1.16 thorpej #define VM_FREELIST_DEFAULT 0
199 1.29 thorpej
200 1.29 thorpej #define VM_MDPAGE_MEMBERS /* XXX nothing yet */
201 1.29 thorpej #define VM_MDPAGE_INIT(pg) /* XXX nothing yet */
202 1.29 thorpej #define PMAP_PHYSSEG /* XXX for now */
203 1.12 scottr
204 1.12 scottr /*
205 1.12 scottr * pmap-specific data stored in the vm_physmem[] array.
206 1.12 scottr */
207 1.12 scottr struct pmap_physseg {
208 1.12 scottr struct pv_entry *pvent; /* pv table for this seg */
209 1.12 scottr char *attrs; /* page attributes for this seg */
210 1.12 scottr };
211 1.12 scottr
212 1.12 scottr #endif /* _MAC68K_VMPARAM_H_ */
213