Annotation of sys/uvm/uvm_param.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: uvm_param.h,v 1.12 2007/03/26 08:43:34 art Exp $ */
2: /* $NetBSD: uvm_param.h,v 1.5 2001/03/09 01:02:12 chs Exp $ */
3:
4: /*
5: * Copyright (c) 1991, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * The Mach Operating System project at Carnegie-Mellon University.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)vm_param.h 8.2 (Berkeley) 1/9/95
36: *
37: *
38: * Copyright (c) 1987, 1990 Carnegie-Mellon University.
39: * All rights reserved.
40: *
41: * Authors: Avadis Tevanian, Jr., Michael Wayne Young
42: *
43: * Permission to use, copy, modify and distribute this software and
44: * its documentation is hereby granted, provided that both the copyright
45: * notice and this permission notice appear in all copies of the
46: * software, derivative works or modified versions, and any portions
47: * thereof, and that both notices appear in supporting documentation.
48: *
49: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
50: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
51: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
52: *
53: * Carnegie Mellon requests users of this software to return to
54: *
55: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
56: * School of Computer Science
57: * Carnegie Mellon University
58: * Pittsburgh PA 15213-3890
59: *
60: * any improvements or extensions that they make and grant Carnegie the
61: * rights to redistribute these changes.
62: */
63:
64: /*
65: * Machine independent virtual memory parameters.
66: */
67:
68: #ifndef _VM_PARAM_
69: #define _VM_PARAM_
70:
71: #include <machine/vmparam.h>
72:
73: /*
74: * This belongs in types.h, but breaks too many existing programs.
75: */
76: typedef int boolean_t;
77: #ifndef TRUE
78: #define TRUE 1
79: #endif
80: #ifndef FALSE
81: #define FALSE 0
82: #endif
83:
84: /*
85: * The machine independent pages are referred to as PAGES. A page
86: * is some number of hardware pages, depending on the target machine.
87: */
88: #define DEFAULT_PAGE_SIZE 4096
89:
90: #if defined(_KERNEL) && !defined(PAGE_SIZE)
91: /*
92: * All references to the size of a page should be done with PAGE_SIZE
93: * or PAGE_SHIFT. The fact they are variables is hidden here so that
94: * we can easily make them constant if we so desire.
95: */
96: #define PAGE_SIZE uvmexp.pagesize /* size of page */
97: #define PAGE_MASK uvmexp.pagemask /* size of page - 1 */
98: #define PAGE_SHIFT uvmexp.pageshift /* bits to shift for pages */
99: #endif /* _KERNEL */
100:
101: /*
102: * CTL_VM identifiers
103: */
104: #define VM_METER 1 /* struct vmmeter */
105: #define VM_LOADAVG 2 /* struct loadavg */
106: #define VM_PSSTRINGS 3 /* PSSTRINGS */
107: #define VM_UVMEXP 4 /* struct uvmexp */
108: #define VM_SWAPENCRYPT 5 /* int */
109: #define VM_NKMEMPAGES 6 /* int - # kmem_map pages */
110: #define VM_ANONMIN 7
111: #define VM_VTEXTMIN 8
112: #define VM_VNODEMIN 9
113: #define VM_MAXSLP 10
114: #define VM_USPACE 11
115: #define VM_MAXID 12 /* number of valid vm ids */
116:
117: #define CTL_VM_NAMES { \
118: { 0, 0 }, \
119: { "vmmeter", CTLTYPE_STRUCT }, \
120: { "loadavg", CTLTYPE_STRUCT }, \
121: { "psstrings", CTLTYPE_STRUCT }, \
122: { "uvmexp", CTLTYPE_STRUCT }, \
123: { "swapencrypt", CTLTYPE_NODE }, \
124: { "nkmempages", CTLTYPE_INT }, \
125: { "anonmin", CTLTYPE_INT }, \
126: { "vtextmin", CTLTYPE_INT }, \
127: { "vnodemin", CTLTYPE_INT }, \
128: { "maxslp", CTLTYPE_INT }, \
129: { "uspace", CTLTYPE_INT }, \
130: }
131:
132: struct _ps_strings {
133: void *val;
134: };
135:
136: #define SWAPSKIPBYTES 8192 /* never use at the start of a swap space */
137:
138: #ifndef ASSEMBLER
139: /*
140: * Convert addresses to pages and vice versa.
141: * No rounding is used.
142: */
143: #ifdef _KERNEL
144: #define atop(x) ((x) >> PAGE_SHIFT)
145: #define ptoa(x) ((x) << PAGE_SHIFT)
146:
147: /*
148: * Round off or truncate to the nearest page. These will work
149: * for either addresses or counts (i.e., 1 byte rounds to 1 page).
150: */
151: #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
152: #define trunc_page(x) ((x) & ~PAGE_MASK)
153:
154: extern psize_t mem_size; /* size of physical memory (bytes) */
155: #ifdef UBC
156: extern int ubc_nwins; /* number of UBC mapping windows */
157: extern int ubc_winsize; /* size of a UBC mapping window */
158: #endif
159:
160: #else
161: /* out-of-kernel versions of round_page and trunc_page */
162: #define round_page(x) \
163: ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \
164: vm_page_size)
165: #define trunc_page(x) \
166: ((((vaddr_t)(x)) / vm_page_size) * vm_page_size)
167:
168: #endif /* _KERNEL */
169: #endif /* ASSEMBLER */
170: #endif /* _VM_PARAM_ */
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