vmparam.h revision 1.39 1 /* $NetBSD: vmparam.h,v 1.39 2002/12/10 05:14:36 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Slightly modified for the VAX port /IC
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91
41 */
42 #ifndef _VMPARAM_H_
43 #define _VMPARAM_H_
44
45 /*
46 * Machine dependent constants for VAX.
47 */
48
49 /*
50 * We use 4K VM pages on the VAX. Override the PAGE_* definitions
51 * to be compile-time constants.
52 */
53 #define PAGE_SHIFT 12
54 #define PAGE_SIZE (1 << PAGE_SHIFT)
55 #define PAGE_MASK (PAGE_SIZE - 1)
56
57 /*
58 * USRSTACK is the top (end) of the user stack. Immediately above the
59 * user stack resides kernel.
60 */
61
62 #define USRSTACK KERNBASE
63
64 /*
65 * Virtual memory related constants, all in bytes
66 */
67
68 #ifndef MAXTSIZ
69 #define MAXTSIZ (8*1024*1024) /* max text size */
70 #endif
71 #ifndef DFLDSIZ
72 #define DFLDSIZ (32*1024*1024) /* initial data size limit */
73 #endif
74 #ifndef MAXDSIZ
75 #define MAXDSIZ (64*1024*1024) /* max data size */
76 #endif
77 #ifndef DFLSSIZ
78 #define DFLSSIZ (512*1024) /* initial stack size limit */
79 #endif
80 #ifndef MAXSSIZ
81 #define MAXSSIZ (8*1024*1024) /* max stack size */
82 #endif
83
84 /*
85 * All mmap()'ed data will be mapped above MAXDSIZ. This means that
86 * pte space must be allocated for (possible) mmap()'ed data.
87 * Note: This is just a hint, if we mmap() more than this the page
88 * table will be expanded. (at the cost of speed).
89 */
90 #define MMAPSPACE (8*1024*1024)
91
92 /*
93 * Size of shared memory map
94 */
95
96 #ifndef SHMMAXPGS
97 #define SHMMAXPGS 1024
98 #endif
99
100 #define VM_PHYSSEG_MAX 1
101 #define VM_PHYSSEG_NOADD
102 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH /* XXX */
103
104 #define VM_NFREELIST 1
105 #define VM_FREELIST_DEFAULT 0
106
107 /* MD round macros */
108 #define vax_round_page(x) (((vaddr_t)(x) + VAX_PGOFSET) & ~VAX_PGOFSET)
109 #define vax_trunc_page(x) ((vaddr_t)(x) & ~VAX_PGOFSET)
110
111 /*
112 * Mach derived constants
113 */
114
115 /* user/kernel map constants */
116 #define VM_MIN_ADDRESS ((vaddr_t)0)
117 #define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE)
118 #define VM_MAX_ADDRESS ((vaddr_t)KERNBASE)
119 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
120 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0xC0000000))
121
122 #define USRIOSIZE (8 * VAX_NPTEPG) /* 512MB */
123 #define VM_PHYS_SIZE (USRIOSIZE*VAX_NBPG)
124
125 #endif
126