Subversion Repositories HelenOS

Rev

Rev 122 | Rev 391 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2
 * Copyright (C) 2001-2004 Jakub Jermar
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
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#ifndef __VM_H__
30
#define __VM_H__
31
 
121 jermar 32
#include <arch/mm/page.h>
1 jermar 33
#include <arch/mm/vm.h>
34
#include <arch/types.h>
35
#include <typedefs.h>
36
#include <synch/spinlock.h>
37
#include <list.h>
38
 
39
#define KERNEL_ADDRESS_SPACE_START  KERNEL_ADDRESS_SPACE_START_ARCH
40
#define KERNEL_ADDRESS_SPACE_END    KERNEL_ADDRESS_SPACE_END_ARCH
41
#define USER_ADDRESS_SPACE_START    USER_ADDRESS_SPACE_START_ARCH
42
#define USER_ADDRESS_SPACE_END      USER_ADDRESS_SPACE_END_ARCH
43
 
44
#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END)
45
 
46
#define UTEXT_ADDRESS   UTEXT_ADDRESS_ARCH
47
#define USTACK_ADDRESS  USTACK_ADDRESS_ARCH
48
#define UDATA_ADDRESS   UDATA_ADDRESS_ARCH
49
 
50
enum vm_type {
51
    VMA_TEXT = 1, VMA_DATA, VMA_STACK
52
};
53
 
54
/*
121 jermar 55
 * Each vm_area_t structure describes one continuous area of virtual memory.
1 jermar 56
 * In the future, it should not be difficult to support shared areas of vm.
57
 */
58
struct vm_area {
59
    spinlock_t lock;
60
    link_t link;
61
    vm_type_t type;
62
    int size;
63
    __address address;
64
    __address *mapping;
65
};
66
 
67
/*
121 jermar 68
 * vm_t contains the list of vm_areas of userspace accessible
1 jermar 69
 * pages for one or more tasks. Ranges of kernel memory pages are not
70
 * supposed to figure in the list as they are shared by all tasks and
71
 * set up during system initialization.
72
 */
73
struct vm {
74
    spinlock_t lock;
75
    link_t vm_area_head;
121 jermar 76
    pte_t *ptl0;
1 jermar 77
};
78
 
167 jermar 79
extern vm_t * vm_create(pte_t *ptl0);
1 jermar 80
extern void vm_destroy(vm_t *m);
81
 
72 decky 82
extern vm_area_t *vm_area_create(vm_t *m, vm_type_t type, size_t size, __address addr);
1 jermar 83
extern void vm_area_destroy(vm_area_t *a);
84
 
167 jermar 85
extern void vm_area_map(vm_area_t *a, vm_t *m);
86
extern void vm_area_unmap(vm_area_t *a, vm_t *m);
1 jermar 87
 
88
extern void vm_install(vm_t *m);
89
extern void vm_uninstall(vm_t *m);
90
 
91
#endif