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175f072e | 1 | /* |
175f072e KM |
2 | * Copyright (c) 1991 Regents of the University of California. |
3 | * 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 | * | |
0e24ad83 | 8 | * %sccs.include.redist.c% |
175f072e | 9 | * |
0e24ad83 KM |
10 | * @(#)vm_param.h 7.2 (Berkeley) %G% |
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. | |
175f072e KM |
37 | */ |
38 | ||
39 | /* | |
40 | * Machine independent virtual memory parameters. | |
41 | */ | |
42 | ||
43 | #ifndef _VM_PARAM_ | |
44 | #define _VM_PARAM_ | |
45 | ||
46 | #ifdef KERNEL | |
47 | #include "machine/vmparam.h" | |
48 | #else | |
49 | #include <machine/vmparam.h> | |
50 | #endif | |
51 | ||
52 | /* | |
53 | * This belongs in types.h, but breaks too many existing programs. | |
54 | */ | |
55 | typedef int boolean_t; | |
56 | #define TRUE 1 | |
57 | #define FALSE 0 | |
58 | ||
59 | /* | |
60 | * The machine independent pages are refered to as PAGES. A page | |
61 | * is some number of hardware pages, depending on the target machine. | |
62 | */ | |
63 | ||
64 | /* | |
65 | * All references to the size of a page should be done with PAGE_SIZE | |
66 | * or PAGE_SHIFT. The fact they are variables is hidden here so that | |
67 | * we can easily make them constant if we so desire. | |
68 | */ | |
69 | ||
70 | #define PAGE_SIZE page_size /* size of page in addressible units */ | |
71 | #define PAGE_SHIFT page_shift /* number of bits to shift for pages */ | |
72 | ||
73 | /* | |
74 | * Return values from the VM routines. | |
75 | */ | |
76 | #define KERN_SUCCESS 0 | |
77 | #define KERN_INVALID_ADDRESS 1 | |
78 | #define KERN_PROTECTION_FAILURE 2 | |
79 | #define KERN_NO_SPACE 3 | |
80 | #define KERN_INVALID_ARGUMENT 4 | |
81 | #define KERN_FAILURE 5 | |
82 | #define KERN_RESOURCE_SHORTAGE 6 | |
83 | #define KERN_NOT_RECEIVER 7 | |
84 | #define KERN_NO_ACCESS 8 | |
85 | ||
86 | #ifdef ASSEMBLER | |
87 | #else ASSEMBLER | |
88 | /* | |
89 | * Convert addresses to pages and vice versa. | |
90 | * No rounding is used. | |
91 | */ | |
92 | ||
93 | #ifdef KERNEL | |
94 | #define atop(x) (((unsigned)(x)) >> page_shift) | |
95 | #define ptoa(x) ((vm_offset_t)((x) << page_shift)) | |
96 | #endif KERNEL | |
97 | ||
98 | /* | |
99 | * Round off or truncate to the nearest page. These will work | |
100 | * for either addresses or counts. (i.e. 1 byte rounds to 1 page | |
101 | * bytes. | |
102 | */ | |
103 | ||
104 | #ifdef KERNEL | |
105 | #define round_page(x) ((vm_offset_t)((((vm_offset_t)(x)) + page_mask) & ~page_mask)) | |
106 | #define trunc_page(x) ((vm_offset_t)(((vm_offset_t)(x)) & ~page_mask)) | |
107 | #else KERNEL | |
108 | #define round_page(x) ((((vm_offset_t)(x) + (vm_page_size - 1)) / vm_page_size) * vm_page_size) | |
109 | #define trunc_page(x) ((((vm_offset_t)(x)) / vm_page_size) * vm_page_size) | |
110 | #endif KERNEL | |
111 | ||
112 | #ifdef KERNEL | |
113 | extern vm_size_t page_size; /* machine independent page size */ | |
114 | extern vm_size_t page_mask; /* page_size - 1; mask for | |
115 | offset within page */ | |
116 | extern int page_shift; /* shift to use for page size */ | |
117 | ||
118 | extern vm_size_t mem_size; /* size of physical memory (bytes) */ | |
119 | extern vm_offset_t first_addr; /* first physical page */ | |
120 | extern vm_offset_t last_addr; /* last physical page */ | |
121 | #endif KERNEL | |
122 | ||
123 | #endif ASSEMBLER | |
124 | ||
125 | #endif _VM_PARAM_ |