Annotation of sys/arch/vax/include/vmparam.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: vmparam.h,v 1.28 2007/04/22 10:05:51 miod Exp $ */
2: /* $NetBSD: vmparam.h,v 1.32 2000/03/07 00:05:59 matt Exp $ */
3:
4: /*-
5: * Copyright (c) 1990 The Regents of the University of California.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * William Jolitz.
10: *
11: * Slightly modified for the VAX port /IC
12: *
13: * Redistribution and use in source and binary forms, with or without
14: * modification, are permitted provided that the following conditions
15: * are met:
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: * 3. 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.
24: *
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
35: * SUCH DAMAGE.
36: *
37: * @(#)vmparam.h 5.9 (Berkeley) 5/12/91
38: */
39: #ifndef _VMPARAM_H_
40: #define _VMPARAM_H_
41:
42: /*
43: * Machine dependent constants for VAX.
44: */
45:
46: /*
47: * USRTEXT is the start of the user text/data space, while USRSTACK
48: * is the top (end) of the user stack. Immediately above the user stack
49: * resides kernel.
50: *
51: */
52:
53: #define USRTEXT NBPG
54: #define USRSTACK KERNBASE
55:
56: /*
57: * Virtual memory related constants, all in bytes
58: */
59:
60: #ifndef MAXTSIZ
61: #define MAXTSIZ (8*1024*1024) /* max text size */
62: #endif
63: #ifndef MAXDSIZ
64: #define MAXDSIZ (32*1024*1024) /* max data size */
65: #endif
66: #ifndef MAXSSIZ
67: #define MAXSSIZ (8*1024*1024) /* max stack size */
68: #endif
69: #ifndef DFLDSIZ
70: #define DFLDSIZ (4*1024*1024) /* initial data size limit */
71: #endif
72: #ifndef DFLSSIZ
73: #define DFLSSIZ (512*1024) /* initial stack size limit */
74: #endif
75:
76: #define STACKGAP_RANDOM 32*1024
77:
78: #define BRKSIZ (8*1024*1024)
79:
80: /*
81: * Size of shared memory map
82: */
83:
84: #ifndef SHMMAXPGS
85: #define SHMMAXPGS 64 /* XXXX should be 1024 */
86: #endif
87:
88: #define VM_PHYSSEG_MAX 1
89: #define VM_PHYSSEG_NOADD
90: #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM
91:
92: #define VM_NFREELIST 1
93: #define VM_FREELIST_DEFAULT 0
94:
95: /* MD round macros */
96: #define vax_round_page(x) (((vaddr_t)(x) + VAX_PGOFSET) & ~VAX_PGOFSET)
97: #define vax_trunc_page(x) ((vaddr_t)(x) & ~VAX_PGOFSET)
98:
99: /* user/kernel map constants */
100: #define VM_MIN_ADDRESS ((vaddr_t)0)
101: #define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE)
102: #define VM_MAX_ADDRESS ((vaddr_t)KERNBASE)
103: #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
104: #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0xC0000000))
105:
106: #define USRIOSIZE (8 * VAX_NPTEPG) /* 512MB */
107: #define VM_PHYS_SIZE (USRIOSIZE*VAX_NBPG)
108:
109: /*
110: * This should be in <machine/pmap.h>, but needs to be in this file
111: * due to include ordering issues.
112: */
113: #define __HAVE_VM_PAGE_MD
114:
115: struct vm_page_md {
116: struct pv_entry *pv_head;
117: int pv_attr; /* write/modified bits */
118: };
119:
120: #define VM_MDPAGE_INIT(pg) \
121: do { \
122: (pg)->mdpage.pv_head = NULL; \
123: (pg)->mdpage.pv_attr = 0; \
124: } while (0)
125:
126: #endif
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