source: rtems/cpukit/libnetworking/vm/vm_param.h @ 9d647dfc

4.104.114.84.95
Last change on this file since 9d647dfc was 39e6e65a, checked in by Joel Sherrill <joel.sherrill@…>, on Aug 19, 1998 at 9:32:28 PM

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File size: 5.6 KB
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1/*
2 * Copyright (c) 1991, 1993
3 *      The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * The Mach Operating System project at Carnegie-Mellon University.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *      This product includes software developed by the University of
19 *      California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *      from: @(#)vm_param.h    8.1 (Berkeley) 6/11/93
37 *
38 *
39 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
40 * All rights reserved.
41 *
42 * Authors: Avadis Tevanian, Jr., Michael Wayne Young
43 *
44 * Permission to use, copy, modify and distribute this software and
45 * its documentation is hereby granted, provided that both the copyright
46 * notice and this permission notice appear in all copies of the
47 * software, derivative works or modified versions, and any portions
48 * thereof, and that both notices appear in supporting documentation.
49 *
50 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
51 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
52 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
53 *
54 * Carnegie Mellon requests users of this software to return to
55 *
56 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
57 *  School of Computer Science
58 *  Carnegie Mellon University
59 *  Pittsburgh PA 15213-3890
60 *
61 * any improvements or extensions that they make and grant Carnegie the
62 * rights to redistribute these changes.
63 *
64 * $Id$
65 */
66
67/*
68 *      Machine independent virtual memory parameters.
69 */
70
71#ifndef _VM_PARAM_
72#define _VM_PARAM_
73
74#include <machine/vmparam.h>
75
76/*
77 *      The machine independent pages are refered to as PAGES.  A page
78 *      is some number of hardware pages, depending on the target machine.
79 */
80#define DEFAULT_PAGE_SIZE       4096
81
82#if 0
83
84/*
85 *      All references to the size of a page should be done with PAGE_SIZE
86 *      or PAGE_SHIFT.  The fact they are variables is hidden here so that
87 *      we can easily make them constant if we so desire.
88 */
89#ifndef PAGE_SIZE
90#define PAGE_SIZE       cnt.v_page_size /* size of page */
91#endif
92#ifndef PAGE_MASK
93#define PAGE_MASK       page_mask       /* size of page - 1 */
94#endif
95#ifndef PAGE_SHIFT
96#define PAGE_SHIFT      page_shift      /* bits to shift for pages */
97#endif
98
99#endif
100
101#ifdef KERNEL
102extern vm_size_t page_mask;
103extern int page_shift;
104
105#endif
106
107/*
108 * CTL_VM identifiers
109 */
110#define VM_METER                1       /* struct vmmeter */
111#define VM_LOADAVG              2       /* struct loadavg */
112#define VM_V_FREE_MIN           3       /* cnt.v_free_min */
113#define VM_V_FREE_TARGET        4       /* cnt.v_free_target */
114#define VM_V_FREE_RESERVED      5       /* cnt.v_free_reserved */
115#define VM_V_INACTIVE_TARGET    6       /* cnt.v_inactive_target */
116#define VM_V_CACHE_MIN          7       /* cnt.v_cache_max */
117#define VM_V_CACHE_MAX          8       /* cnt.v_cache_min */
118#define VM_V_PAGEOUT_FREE_MIN   9       /* cnt.v_pageout_free_min */
119#define VM_PAGEOUT_ALGORITHM    10      /* pageout algorithm */
120#define VM_SWAPPING_ENABLED     11      /* swapping enabled */
121#define VM_MAXID                12      /* number of valid vm ids */
122
123#define CTL_VM_NAMES { \
124        { 0, 0 }, \
125        { "vmmeter", CTLTYPE_STRUCT }, \
126        { "loadavg", CTLTYPE_STRUCT }, \
127        { "v_free_min", CTLTYPE_INT }, \
128        { "v_free_target", CTLTYPE_INT }, \
129        { "v_free_reserved", CTLTYPE_INT }, \
130        { "v_inactive_target", CTLTYPE_INT }, \
131        { "v_cache_min", CTLTYPE_INT }, \
132        { "v_cache_max", CTLTYPE_INT }, \
133        { "v_pageout_free_min", CTLTYPE_INT}, \
134        { "pageout_algorithm", CTLTYPE_INT}, \
135        { "swapping_enabled", CTLTYPE_INT},\
136}
137
138/*
139 *      Return values from the VM routines.
140 */
141#define KERN_SUCCESS            0
142#define KERN_INVALID_ADDRESS    1
143#define KERN_PROTECTION_FAILURE 2
144#define KERN_NO_SPACE           3
145#define KERN_INVALID_ARGUMENT   4
146#define KERN_FAILURE            5
147#define KERN_RESOURCE_SHORTAGE  6
148#define KERN_NOT_RECEIVER       7
149#define KERN_NO_ACCESS          8
150
151#ifndef ASSEMBLER
152/*
153 *      Convert addresses to pages and vice versa.
154 *      No rounding is used.
155 */
156#ifdef KERNEL
157#define num_pages(x) \
158        ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT))
159
160extern vm_size_t mem_size;      /* size of physical memory (bytes) */
161extern vm_offset_t first_addr;  /* first physical page */
162extern vm_offset_t last_addr;   /* last physical page */
163#endif                          /* KERNEL */
164#endif                          /* ASSEMBLER */
165#endif                          /* _VM_PARAM_ */
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