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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 __AS_H__ |
29 | #ifndef __AS_H__ |
30 | #define __AS_H__ |
30 | #define __AS_H__ |
31 | 31 | ||
32 | #include <arch/mm/page.h> |
32 | #include <arch/mm/page.h> |
33 | #include <arch/mm/as.h> |
33 | #include <arch/mm/as.h> |
34 | #include <arch/mm/asid.h> |
34 | #include <arch/mm/asid.h> |
35 | #include <arch/types.h> |
35 | #include <arch/types.h> |
36 | #include <typedefs.h> |
36 | #include <typedefs.h> |
37 | #include <synch/spinlock.h> |
37 | #include <synch/spinlock.h> |
38 | #include <adt/list.h> |
38 | #include <adt/list.h> |
39 | 39 | ||
40 | #define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH |
40 | #define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH |
41 | #define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH |
41 | #define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH |
42 | #define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH |
42 | #define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH |
43 | #define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH |
43 | #define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH |
44 | 44 | ||
45 | #define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END) |
45 | #define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END) |
46 | 46 | ||
47 | #define USTACK_ADDRESS USTACK_ADDRESS_ARCH |
47 | #define USTACK_ADDRESS USTACK_ADDRESS_ARCH |
48 | 48 | ||
49 | #define FLAG_AS_KERNEL (1 << 0) /**< Kernel address space. */ |
49 | #define FLAG_AS_KERNEL (1 << 0) /**< Kernel address space. */ |
50 | 50 | ||
51 | enum as_area_type { |
51 | enum as_area_type { |
52 | AS_AREA_TEXT = 1, AS_AREA_DATA, AS_AREA_STACK |
52 | AS_AREA_TEXT = 1, AS_AREA_DATA, AS_AREA_STACK |
53 | }; |
53 | }; |
54 | 54 | ||
55 | /** Address space area structure. |
55 | /** Address space area structure. |
56 | * |
56 | * |
57 | * Each as_area_t structure describes one contiguous area of virtual memory. |
57 | * Each as_area_t structure describes one contiguous area of virtual memory. |
58 | * In the future, it should not be difficult to support shared areas. |
58 | * In the future, it should not be difficult to support shared areas. |
59 | */ |
59 | */ |
60 | struct as_area { |
60 | struct as_area { |
61 | SPINLOCK_DECLARE(lock); |
61 | SPINLOCK_DECLARE(lock); |
62 | link_t link; |
62 | link_t link; |
63 | as_area_type_t type; |
63 | as_area_type_t type; |
64 | size_t size; /**< Size of this area in multiples of PAGE_SIZE. */ |
64 | size_t size; /**< Size of this area in multiples of PAGE_SIZE. */ |
65 | __address base; /**< Base address of this area. */ |
65 | __address base; /**< Base address of this area. */ |
66 | }; |
66 | }; |
67 | 67 | ||
68 | /** Address space structure. |
68 | /** Address space structure. |
69 | * |
69 | * |
70 | * as_t contains the list of as_areas of userspace accessible |
70 | * as_t contains the list of as_areas of userspace accessible |
71 | * pages for one or more tasks. Ranges of kernel memory pages are not |
71 | * pages for one or more tasks. Ranges of kernel memory pages are not |
72 | * supposed to figure in the list as they are shared by all tasks and |
72 | * supposed to figure in the list as they are shared by all tasks and |
73 | * set up during system initialization. |
73 | * set up during system initialization. |
74 | */ |
74 | */ |
75 | struct as { |
75 | struct as { |
76 | /** Protected by asidlock. Must be acquired before as->lock. */ |
76 | /** Protected by asidlock. Must be acquired before as->lock. */ |
77 | link_t inactive_as_with_asid_link; |
77 | link_t inactive_as_with_asid_link; |
78 | 78 | ||
79 | SPINLOCK_DECLARE(lock); |
79 | SPINLOCK_DECLARE(lock); |
80 | 80 | ||
81 | /** Number of processors on wich is this address space active. */ |
81 | /** Number of processors on wich is this address space active. */ |
82 | count_t refcount; |
82 | count_t refcount; |
83 | 83 | ||
84 | link_t as_area_head; |
84 | link_t as_area_head; |
85 | 85 | ||
86 | /** Page table pointer. Constant on architectures that use global page hash table. */ |
86 | /** Page table pointer. Constant on architectures that use global page hash table. */ |
87 | pte_t *page_table; |
87 | pte_t *page_table; |
88 | 88 | ||
89 | /** Address space identifier. Constant on architectures that do not support ASIDs.*/ |
89 | /** Address space identifier. Constant on architectures that do not support ASIDs.*/ |
90 | asid_t asid; |
90 | asid_t asid; |
91 | }; |
91 | }; |
92 | 92 | ||
93 | struct as_operations { |
93 | struct as_operations { |
94 | pte_t *(* page_table_create)(int flags); |
94 | pte_t *(* page_table_create)(int flags); |
95 | }; |
95 | }; |
96 | typedef struct as_operations as_operations_t; |
96 | typedef struct as_operations as_operations_t; |
97 | 97 | ||
98 | extern as_t *AS_KERNEL; |
98 | extern as_t *AS_KERNEL; |
99 | extern as_operations_t *as_operations; |
99 | extern as_operations_t *as_operations; |
100 | 100 | ||
101 | extern spinlock_t as_lock; |
101 | extern spinlock_t as_lock; |
102 | extern link_t inactive_as_with_asid_head; |
102 | extern link_t inactive_as_with_asid_head; |
103 | 103 | ||
104 | extern void as_init(void); |
104 | extern void as_init(void); |
105 | extern as_t *as_create(int flags); |
105 | extern as_t *as_create(int flags); |
106 | extern as_area_t *as_area_create(as_t *as, as_area_type_t type, size_t size, __address base); |
106 | extern as_area_t *as_area_create(as_t *as, as_area_type_t type, size_t size, __address base); |
107 | extern void as_set_mapping(as_t *as, __address page, __address frame); |
107 | extern void as_set_mapping(as_t *as, __address page, __address frame); |
108 | extern int as_page_fault(__address page); |
108 | extern int as_page_fault(__address page); |
109 | extern void as_switch(as_t *old, as_t *new); |
109 | extern void as_switch(as_t *old, as_t *new); |
- | 110 | extern void as_free(as_t *as); |
|
110 | 111 | ||
111 | /* Interface to be implemented by architectures. */ |
112 | /* Interface to be implemented by architectures. */ |
112 | #ifndef as_install_arch |
113 | #ifndef as_install_arch |
113 | extern void as_install_arch(as_t *as); |
114 | extern void as_install_arch(as_t *as); |
114 | #endif /* !def as_install_arch */ |
115 | #endif /* !def as_install_arch */ |
115 | 116 | ||
116 | #endif |
117 | #endif |
117 | 118 |