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175f072e | 1 | /* |
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2 | * Copyright (c) 1991, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
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4 | * |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * The Mach Operating System project at Carnegie-Mellon University. | |
7 | * | |
0e24ad83 | 8 | * %sccs.include.redist.c% |
175f072e | 9 | * |
ad0f93d2 | 10 | * @(#)vm_param.h 8.1 (Berkeley) %G% |
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11 | * |
12 | * | |
13 | * Copyright (c) 1987, 1990 Carnegie-Mellon University. | |
14 | * All rights reserved. | |
15 | * | |
16 | * Authors: Avadis Tevanian, Jr., Michael Wayne Young | |
17 | * | |
18 | * Permission to use, copy, modify and distribute this software and | |
19 | * its documentation is hereby granted, provided that both the copyright | |
20 | * notice and this permission notice appear in all copies of the | |
21 | * software, derivative works or modified versions, and any portions | |
22 | * thereof, and that both notices appear in supporting documentation. | |
23 | * | |
24 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
25 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND | |
26 | * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
27 | * | |
28 | * Carnegie Mellon requests users of this software to return to | |
29 | * | |
30 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
31 | * School of Computer Science | |
32 | * Carnegie Mellon University | |
33 | * Pittsburgh PA 15213-3890 | |
34 | * | |
35 | * any improvements or extensions that they make and grant Carnegie the | |
36 | * rights to redistribute these changes. | |
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37 | */ |
38 | ||
39 | /* | |
40 | * Machine independent virtual memory parameters. | |
41 | */ | |
42 | ||
43 | #ifndef _VM_PARAM_ | |
44 | #define _VM_PARAM_ | |
45 | ||
175f072e | 46 | #include <machine/vmparam.h> |
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47 | |
48 | /* | |
49 | * This belongs in types.h, but breaks too many existing programs. | |
50 | */ | |
51 | typedef int boolean_t; | |
52 | #define TRUE 1 | |
53 | #define FALSE 0 | |
54 | ||
55 | /* | |
56 | * The machine independent pages are refered to as PAGES. A page | |
57 | * is some number of hardware pages, depending on the target machine. | |
58 | */ | |
c34d10ef | 59 | #define DEFAULT_PAGE_SIZE 4096 |
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60 | |
61 | /* | |
62 | * All references to the size of a page should be done with PAGE_SIZE | |
63 | * or PAGE_SHIFT. The fact they are variables is hidden here so that | |
64 | * we can easily make them constant if we so desire. | |
65 | */ | |
f92ce83a | 66 | #define PAGE_SIZE cnt.v_page_size /* size of page */ |
9e46e59c | 67 | #define PAGE_MASK page_mask /* size of page - 1 */ |
c34d10ef | 68 | #define PAGE_SHIFT page_shift /* bits to shift for pages */ |
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69 | #ifdef KERNEL |
70 | extern vm_size_t page_mask; | |
71 | extern int page_shift; | |
72 | #endif | |
73 | ||
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74 | /* |
75 | * CTL_VM identifiers | |
76 | */ | |
77 | #define VM_METER 1 /* struct vmmeter */ | |
78 | #define VM_LOADAVG 2 /* struct loadavg */ | |
79 | #define VM_MAXID 3 /* number of valid vm ids */ | |
80 | ||
81 | #define CTL_VM_NAMES { \ | |
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82 | { 0, 0 }, \ |
83 | { "vmmeter", CTLTYPE_STRUCT }, \ | |
84 | { "loadavg", CTLTYPE_STRUCT }, \ | |
0cac6ddf | 85 | } |
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86 | |
87 | /* | |
88 | * Return values from the VM routines. | |
89 | */ | |
90 | #define KERN_SUCCESS 0 | |
91 | #define KERN_INVALID_ADDRESS 1 | |
92 | #define KERN_PROTECTION_FAILURE 2 | |
93 | #define KERN_NO_SPACE 3 | |
94 | #define KERN_INVALID_ARGUMENT 4 | |
95 | #define KERN_FAILURE 5 | |
96 | #define KERN_RESOURCE_SHORTAGE 6 | |
97 | #define KERN_NOT_RECEIVER 7 | |
98 | #define KERN_NO_ACCESS 8 | |
99 | ||
b73f8487 | 100 | #ifndef ASSEMBLER |
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101 | /* |
102 | * Convert addresses to pages and vice versa. | |
103 | * No rounding is used. | |
104 | */ | |
b73f8487 | 105 | #ifdef KERNEL |
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106 | #define atop(x) (((unsigned)(x)) >> PAGE_SHIFT) |
107 | #define ptoa(x) ((vm_offset_t)((x) << PAGE_SHIFT)) | |
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108 | |
109 | /* | |
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110 | * Round off or truncate to the nearest page. These will work |
111 | * for either addresses or counts (i.e., 1 byte rounds to 1 page). | |
175f072e | 112 | */ |
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113 | #define round_page(x) \ |
114 | ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) & ~PAGE_MASK)) | |
115 | #define trunc_page(x) \ | |
116 | ((vm_offset_t)(((vm_offset_t)(x)) & ~PAGE_MASK)) | |
117 | #define num_pages(x) \ | |
118 | ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT)) | |
175f072e | 119 | |
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120 | extern vm_size_t mem_size; /* size of physical memory (bytes) */ |
121 | extern vm_offset_t first_addr; /* first physical page */ | |
122 | extern vm_offset_t last_addr; /* last physical page */ | |
175f072e | 123 | |
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124 | #else |
125 | /* out-of-kernel versions of round_page and trunc_page */ | |
126 | #define round_page(x) \ | |
127 | ((((vm_offset_t)(x) + (vm_page_size - 1)) / vm_page_size) * vm_page_size) | |
128 | #define trunc_page(x) \ | |
129 | ((((vm_offset_t)(x)) / vm_page_size) * vm_page_size) | |
175f072e | 130 | |
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131 | #endif /* KERNEL */ |
132 | #endif /* ASSEMBLER */ | |
133 | #endif /* _VM_PARAM_ */ |