Annotation of prex/sys/include/vm.h, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 2005-2008, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #ifndef _VM_H
31: #define _VM_H
32:
33: #include <arch.h> /* for pgd_t */
34:
35: /*
36: * One structure per allocated region.
37: */
38: struct region {
39: struct region *prev; /* region list sorted by address */
40: struct region *next;
41: struct region *sh_prev; /* link for all shared region */
42: struct region *sh_next;
43: void *addr; /* base address */
44: size_t size; /* size */
45: int flags; /* flag */
46: #ifdef CONFIG_MMU
47: void *phys; /* physical address */
48: #endif
49: };
50:
51: /* Flags for region */
52: #define REG_READ 0x00000001
53: #define REG_WRITE 0x00000002
54: #define REG_EXEC 0x00000004
55: #define REG_SHARED 0x00000008
56: #define REG_MAPPED 0x00000010
57: #define REG_FREE 0x00000080
58:
59: /*
60: * VM mapping per one task.
61: */
62: struct vm_map {
63: struct region head; /* list head of regions */
64: int refcnt; /* reference count */
65: pgd_t pgd; /* page directory */
66: };
67:
68: /* VM attributes */
69: #define VMA_READ 0x01
70: #define VMA_WRITE 0x02
71: #define VMA_EXEC 0x04
72:
73: extern int vm_allocate(task_t, void **, size_t, int);
74: extern int vm_free(task_t, void *);
75: extern int vm_attribute(task_t, void *, int);
76: extern int vm_map(task_t, void *, size_t, void **);
77: extern vm_map_t vm_fork(vm_map_t);
78: extern vm_map_t vm_create(void);
79: extern int vm_reference(vm_map_t);
80: extern void vm_terminate(vm_map_t);
81: extern void vm_switch(vm_map_t);
82: extern int vm_load(vm_map_t, struct module *, void **);
83: extern void *vm_translate(void *, size_t);
84: extern void vm_dump(void);
85: extern void vm_init(void);
86:
87: #endif /* !_VM_H */
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