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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #ifndef __VM_H__ |
29 | #ifndef __VM_H__ |
30 | #define __VM_H__ |
30 | #define __VM_H__ |
31 | 31 | ||
32 | #include <arch/mm/page.h> |
32 | #include <arch/mm/page.h> |
33 | #include <arch/mm/vm.h> |
33 | #include <arch/mm/vm.h> |
34 | #include <arch/types.h> |
34 | #include <arch/types.h> |
35 | #include <typedefs.h> |
35 | #include <typedefs.h> |
36 | #include <synch/spinlock.h> |
36 | #include <synch/spinlock.h> |
37 | #include <list.h> |
37 | #include <list.h> |
38 | 38 | ||
39 | #define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH |
39 | #define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH |
40 | #define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH |
40 | #define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH |
41 | #define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH |
41 | #define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH |
42 | #define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH |
42 | #define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH |
43 | 43 | ||
44 | #define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END) |
44 | #define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END) |
45 | 45 | ||
46 | #define UTEXT_ADDRESS UTEXT_ADDRESS_ARCH |
46 | #define UTEXT_ADDRESS UTEXT_ADDRESS_ARCH |
47 | #define USTACK_ADDRESS USTACK_ADDRESS_ARCH |
47 | #define USTACK_ADDRESS USTACK_ADDRESS_ARCH |
48 | #define UDATA_ADDRESS UDATA_ADDRESS_ARCH |
48 | #define UDATA_ADDRESS UDATA_ADDRESS_ARCH |
49 | 49 | ||
50 | enum vm_type { |
50 | enum vm_type { |
51 | VMA_TEXT = 1, VMA_DATA, VMA_STACK |
51 | VMA_TEXT = 1, VMA_DATA, VMA_STACK |
52 | }; |
52 | }; |
53 | 53 | ||
54 | /* |
54 | /* |
55 | * Each vm_area_t structure describes one continuous area of virtual memory. |
55 | * Each vm_area_t structure describes one continuous area of virtual memory. |
56 | * In the future, it should not be difficult to support shared areas of vm. |
56 | * In the future, it should not be difficult to support shared areas of vm. |
57 | */ |
57 | */ |
58 | struct vm_area { |
58 | struct vm_area { |
59 | spinlock_t lock; |
59 | spinlock_t lock; |
60 | link_t link; |
60 | link_t link; |
61 | vm_type_t type; |
61 | vm_type_t type; |
62 | int size; |
62 | int size; |
63 | __address address; |
63 | __address address; |
64 | __address *mapping; |
64 | __address *mapping; |
65 | }; |
65 | }; |
66 | 66 | ||
67 | /* |
67 | /* |
68 | * vm_t contains the list of vm_areas of userspace accessible |
68 | * vm_t contains the list of vm_areas of userspace accessible |
69 | * pages for one or more tasks. Ranges of kernel memory pages are not |
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 |
70 | * supposed to figure in the list as they are shared by all tasks and |
71 | * set up during system initialization. |
71 | * set up during system initialization. |
72 | */ |
72 | */ |
73 | struct vm { |
73 | struct vm { |
74 | spinlock_t lock; |
74 | spinlock_t lock; |
75 | link_t vm_area_head; |
75 | link_t vm_area_head; |
76 | pte_t *ptl0; |
76 | pte_t *ptl0; |
77 | }; |
77 | }; |
78 | 78 | ||
79 | extern vm_t * vm_create(void); |
79 | extern vm_t * vm_create(pte_t *ptl0); |
80 | extern void vm_destroy(vm_t *m); |
80 | extern void vm_destroy(vm_t *m); |
81 | 81 | ||
82 | extern vm_area_t *vm_area_create(vm_t *m, vm_type_t type, size_t size, __address addr); |
82 | extern vm_area_t *vm_area_create(vm_t *m, vm_type_t type, size_t size, __address addr); |
83 | extern void vm_area_destroy(vm_area_t *a); |
83 | extern void vm_area_destroy(vm_area_t *a); |
84 | 84 | ||
85 | extern void vm_area_map(vm_area_t *a); |
85 | extern void vm_area_map(vm_area_t *a, vm_t *m); |
86 | extern void vm_area_unmap(vm_area_t *a); |
86 | extern void vm_area_unmap(vm_area_t *a, vm_t *m); |
87 | 87 | ||
88 | extern void vm_install(vm_t *m); |
88 | extern void vm_install(vm_t *m); |
89 | extern void vm_uninstall(vm_t *m); |
89 | extern void vm_uninstall(vm_t *m); |
90 | 90 | ||
91 | #endif |
91 | #endif |
92 | 92 |