vmparam.h revision 1.42 1 1.42 rmind /* $NetBSD: vmparam.h,v 1.42 2011/02/08 20:20:18 rmind Exp $ */
2 1.6 cgd
3 1.1 briggs /*
4 1.42 rmind * 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 1.34 agc *
8 1.34 agc * This code is derived from software contributed to Berkeley by
9 1.34 agc * the Systems Programming Group of the University of Utah Computer
10 1.34 agc * Science Department.
11 1.34 agc *
12 1.34 agc * Redistribution and use in source and binary forms, with or without
13 1.34 agc * modification, are permitted provided that the following conditions
14 1.34 agc * are met:
15 1.34 agc * 1. Redistributions of source code must retain the above copyright
16 1.34 agc * notice, this list of conditions and the following disclaimer.
17 1.34 agc * 2. Redistributions in binary form must reproduce the above copyright
18 1.34 agc * notice, this list of conditions and the following disclaimer in the
19 1.34 agc * documentation and/or other materials provided with the distribution.
20 1.34 agc * 3. Neither the name of the University nor the names of its contributors
21 1.34 agc * may be used to endorse or promote products derived from this software
22 1.34 agc * without specific prior written permission.
23 1.34 agc *
24 1.34 agc * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 1.34 agc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 1.34 agc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 1.34 agc * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 1.34 agc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 1.34 agc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 1.34 agc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 1.34 agc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 1.34 agc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 1.34 agc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 1.34 agc * SUCH DAMAGE.
35 1.34 agc */
36 1.42 rmind
37 1.1 briggs /*-
38 1.1 briggs * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
39 1.1 briggs * Michael L. Finch, Bradley A. Grantham, and
40 1.1 briggs * Lawrence A. Kesteloot
41 1.1 briggs * All rights reserved.
42 1.1 briggs *
43 1.1 briggs * Redistribution and use in source and binary forms, with or without
44 1.1 briggs * modification, are permitted provided that the following conditions
45 1.1 briggs * are met:
46 1.1 briggs * 1. Redistributions of source code must retain the above copyright
47 1.1 briggs * notice, this list of conditions and the following disclaimer.
48 1.1 briggs * 2. Redistributions in binary form must reproduce the above copyright
49 1.1 briggs * notice, this list of conditions and the following disclaimer in the
50 1.1 briggs * documentation and/or other materials provided with the distribution.
51 1.1 briggs * 3. All advertising materials mentioning features or use of this software
52 1.1 briggs * must display the following acknowledgement:
53 1.1 briggs * This product includes software developed by the Alice Group.
54 1.1 briggs * 4. The names of the Alice Group or any of its members may not be used
55 1.1 briggs * to endorse or promote products derived from this software without
56 1.1 briggs * specific prior written permission.
57 1.1 briggs *
58 1.1 briggs * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
59 1.1 briggs * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
60 1.1 briggs * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
61 1.1 briggs * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
62 1.1 briggs * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
63 1.1 briggs * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
64 1.1 briggs * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
65 1.1 briggs * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
66 1.1 briggs * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
67 1.1 briggs * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
68 1.1 briggs *
69 1.1 briggs */
70 1.1 briggs /*
71 1.1 briggs * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
72 1.1 briggs *
73 1.6 cgd * @(#)vmparam.h 7.3 (Berkeley) 5/7/91
74 1.1 briggs */
75 1.1 briggs
76 1.12 scottr #ifndef _MAC68K_VMPARAM_H_
77 1.12 scottr #define _MAC68K_VMPARAM_H_
78 1.12 scottr
79 1.1 briggs /*
80 1.7 briggs * Machine dependent constants for mac68k -- mostly derived from hp300.
81 1.1 briggs */
82 1.27 thorpej
83 1.27 thorpej /*
84 1.27 thorpej * We use 4K pages on the mac68k. Override the PAGE_* definitions
85 1.27 thorpej * to be compile-time constants.
86 1.27 thorpej */
87 1.40 tsutsui #define PAGE_SHIFT PGSHIFT
88 1.27 thorpej #define PAGE_SIZE (1 << PAGE_SHIFT)
89 1.27 thorpej #define PAGE_MASK (PAGE_SIZE - 1)
90 1.1 briggs
91 1.1 briggs /*
92 1.32 thorpej * USRSTACK is the top (end) of the user stack.
93 1.1 briggs *
94 1.33 thorpej * NOTE: HP300 uses HIGHPAGES == (0x100000/PAGE_SIZE) for HP/UX compatibility.
95 1.7 briggs * Do we care? Obviously not at the moment.
96 1.1 briggs */
97 1.33 thorpej #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */
98 1.1 briggs #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */
99 1.1 briggs #define P1PAGES 0x100000
100 1.7 briggs #define HIGHPAGES 3 /* UPAGES */
101 1.1 briggs
102 1.1 briggs /*
103 1.1 briggs * Virtual memory related constants, all in bytes
104 1.1 briggs */
105 1.1 briggs #ifndef MAXTSIZ
106 1.7 briggs #define MAXTSIZ (8*1024*1024) /* max text size */
107 1.1 briggs #endif
108 1.1 briggs #ifndef DFLDSIZ
109 1.20 scottr #define DFLDSIZ (32*1024*1024) /* initial data size limit */
110 1.1 briggs #endif
111 1.1 briggs #ifndef MAXDSIZ
112 1.7 briggs #define MAXDSIZ (64*1024*1024) /* max data size */
113 1.1 briggs #endif
114 1.1 briggs #ifndef DFLSSIZ
115 1.19 scottr #define DFLSSIZ (2*1024*1024) /* initial stack size limit */
116 1.1 briggs #endif
117 1.1 briggs #ifndef MAXSSIZ
118 1.19 scottr #define MAXSSIZ (32*1024*1024) /* max stack size */
119 1.1 briggs #endif
120 1.1 briggs
121 1.1 briggs /*
122 1.1 briggs * Sizes of the system and user portions of the system page table.
123 1.1 briggs */
124 1.1 briggs /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
125 1.1 briggs #define SYSPTSIZE (2 * NPTEPG) /* 8mb */
126 1.7 briggs #define USRPTSIZE (1 * NPTEPG) /* 4mb */
127 1.1 briggs
128 1.1 briggs /*
129 1.1 briggs * PTEs for mapping user space into the kernel for phyio operations.
130 1.1 briggs * One page is enough to handle 4Mb of simultaneous raw IO operations.
131 1.1 briggs */
132 1.1 briggs #ifndef USRIOSIZE
133 1.1 briggs #define USRIOSIZE (1 * NPTEPG) /* 4mb */
134 1.1 briggs #endif
135 1.1 briggs
136 1.1 briggs /*
137 1.1 briggs * Mach derived constants
138 1.1 briggs */
139 1.1 briggs
140 1.1 briggs /* user/kernel map constants */
141 1.17 scottr #define VM_MIN_ADDRESS ((vaddr_t)0)
142 1.17 scottr #define VM_MAXUSER_ADDRESS ((vaddr_t)(USRSTACK))
143 1.33 thorpej #define VM_MAX_ADDRESS ((vaddr_t)(0-(UPAGES*PAGE_SIZE)))
144 1.17 scottr #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
145 1.37 tsutsui #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG))
146 1.1 briggs
147 1.1 briggs /* virtual sizes (bytes) for various kernel submaps */
148 1.33 thorpej #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
149 1.1 briggs
150 1.1 briggs /* # of kernel PT pages (initial only, can grow dynamically) */
151 1.21 scottr #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */
152 1.12 scottr
153 1.12 scottr /*
154 1.12 scottr * Constants which control the way the VM system deals with memory segments.
155 1.12 scottr * Most mac68k systems have only 1 physical memory segment, but some have 2.
156 1.14 scottr *
157 1.14 scottr * On the systems that have multiple segments, specifically the IIsi and
158 1.14 scottr * IIci, the optimal configuration is to put the higher-density SIMMs in
159 1.14 scottr * bank B. This is because the on-board video uses main memory in bank A
160 1.14 scottr * for the framebuffer, and a memory controller prevents access during
161 1.14 scottr * video refresh cycles. Even if both banks contain the same amount of
162 1.14 scottr * RAM, a minimum of ~320KB will be subtracted from the amount in bank A
163 1.14 scottr * for the framebuffer (if on-board video is in use).
164 1.12 scottr */
165 1.12 scottr #define VM_PHYSSEG_MAX 2
166 1.14 scottr #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
167 1.16 thorpej
168 1.16 thorpej #define VM_NFREELIST 1
169 1.16 thorpej #define VM_FREELIST_DEFAULT 0
170 1.29 thorpej
171 1.30 thorpej #define __HAVE_PMAP_PHYSSEG
172 1.12 scottr
173 1.12 scottr /*
174 1.12 scottr * pmap-specific data stored in the vm_physmem[] array.
175 1.12 scottr */
176 1.12 scottr struct pmap_physseg {
177 1.39 thorpej struct pv_header *pvheader; /* pv table for this seg */
178 1.12 scottr };
179 1.12 scottr
180 1.12 scottr #endif /* _MAC68K_VMPARAM_H_ */
181