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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 | #include <mm/vm.h> |
29 | #include <mm/vm.h> |
30 | #include <mm/page.h> |
30 | #include <mm/page.h> |
31 | #include <mm/frame.h> |
31 | #include <mm/frame.h> |
32 | #include <mm/tlb.h> |
32 | #include <mm/tlb.h> |
33 | #include <arch/mm/page.h> |
33 | #include <arch/mm/page.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 <config.h> |
37 | #include <config.h> |
38 | #include <list.h> |
38 | #include <list.h> |
39 | #include <panic.h> |
39 | #include <panic.h> |
40 | 40 | ||
41 | vm_t *vm_create(void) |
41 | vm_t *vm_create(void) |
42 | { |
42 | { |
43 | vm_t *m; |
43 | vm_t *m; |
44 | 44 | ||
45 | m = (vm_t *) malloc(sizeof(vm_t)); |
45 | m = (vm_t *) malloc(sizeof(vm_t)); |
46 | if (m) { |
46 | if (m) { |
47 | spinlock_initialize(&m->lock); |
47 | spinlock_initialize(&m->lock); |
48 | list_initialize(&m->vm_area_head); |
48 | list_initialize(&m->vm_area_head); |
49 | } |
49 | } |
50 | 50 | ||
51 | return m; |
51 | return m; |
52 | } |
52 | } |
53 | 53 | ||
54 | void vm_destroy(vm_t *m) |
54 | void vm_destroy(vm_t *m) |
55 | { |
55 | { |
56 | } |
56 | } |
57 | 57 | ||
58 | vm_area_t *vm_area_create(vm_t *m, vm_type_t type, int size, __address addr) |
58 | vm_area_t *vm_area_create(vm_t *m, vm_type_t type, int size, __address addr) |
59 | { |
59 | { |
60 | pri_t pri; |
60 | pri_t pri; |
61 | vm_area_t *a; |
61 | vm_area_t *a; |
62 | 62 | ||
63 | if (addr % PAGE_SIZE) |
63 | if (addr % PAGE_SIZE) |
64 | panic(PANIC "addr not aligned to a page boundary"); |
64 | panic(PANIC "addr not aligned to a page boundary"); |
65 | 65 | ||
66 | pri = cpu_priority_high(); |
66 | pri = cpu_priority_high(); |
67 | spinlock_lock(&m->lock); |
67 | spinlock_lock(&m->lock); |
68 | 68 | ||
69 | /* |
69 | /* |
70 | * TODO: test vm_area which is to be created doesn't overlap with an existing one. |
70 | * TODO: test vm_area which is to be created doesn't overlap with an existing one. |
71 | */ |
71 | */ |
72 | 72 | ||
73 | a = (vm_area_t *) malloc(sizeof(vm_area_t)); |
73 | a = (vm_area_t *) malloc(sizeof(vm_area_t)); |
74 | if (a) { |
74 | if (a) { |
75 | int i; |
75 | int i; |
76 | 76 | ||
77 | a->mapping = (__address *) malloc(size * sizeof(__address)); |
77 | a->mapping = (__address *) malloc(size * sizeof(__address)); |
78 | if (!a->mapping) { |
78 | if (!a->mapping) { |
79 | free(a); |
79 | free(a); |
80 | spinlock_unlock(&m->lock); |
80 | spinlock_unlock(&m->lock); |
81 | cpu_priority_restore(pri); |
81 | cpu_priority_restore(pri); |
82 | return NULL; |
82 | return NULL; |
83 | } |
83 | } |
84 | 84 | ||
85 | for (i=0; i<size; i++) |
85 | for (i=0; i<size; i++) |
86 | a->mapping[i] = frame_alloc(0); |
86 | a->mapping[i] = frame_alloc(0); |
87 | 87 | ||
88 | spinlock_initialize(&a->lock); |
88 | spinlock_initialize(&a->lock); |
89 | 89 | ||
90 | link_initialize(&a->link); |
90 | link_initialize(&a->link); |
91 | a->type = type; |
91 | a->type = type; |
92 | a->size = size; |
92 | a->size = size; |
93 | a->address = addr; |
93 | a->address = addr; |
94 | 94 | ||
95 | list_append(&a->link, &m->vm_area_head); |
95 | list_append(&a->link, &m->vm_area_head); |
96 | 96 | ||
97 | } |
97 | } |
98 | 98 | ||
99 | spinlock_unlock(&m->lock); |
99 | spinlock_unlock(&m->lock); |
100 | cpu_priority_restore(pri); |
100 | cpu_priority_restore(pri); |
101 | 101 | ||
102 | return a; |
102 | return a; |
103 | } |
103 | } |
104 | 104 | ||
105 | void vm_area_destroy(vm_area_t *a) |
105 | void vm_area_destroy(vm_area_t *a) |
106 | { |
106 | { |
107 | } |
107 | } |
108 | 108 | ||
109 | void vm_area_map(vm_area_t *a) |
109 | void vm_area_map(vm_area_t *a) |
110 | { |
110 | { |
111 | int i, flags; |
111 | int i, flags; |
112 | pri_t pri; |
112 | pri_t pri; |
113 | 113 | ||
114 | pri = cpu_priority_high(); |
114 | pri = cpu_priority_high(); |
115 | spinlock_lock(&a->lock); |
115 | spinlock_lock(&a->lock); |
116 | 116 | ||
117 | switch (a->type) { |
117 | switch (a->type) { |
118 | case VMA_TEXT: |
118 | case VMA_TEXT: |
119 | flags = PAGE_EXEC | PAGE_READ | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
119 | flags = PAGE_EXEC | PAGE_READ | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
120 | break; |
120 | break; |
121 | case VMA_DATA: |
121 | case VMA_DATA: |
122 | case VMA_STACK: |
122 | case VMA_STACK: |
123 | flags = PAGE_READ | PAGE_WRITE | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
123 | flags = PAGE_READ | PAGE_WRITE | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
124 | break; |
124 | break; |
125 | default: |
125 | default: |
126 | panic(PANIC "unexpected vm_type_t %d", a->type); |
126 | panic(PANIC "unexpected vm_type_t %d", a->type); |
127 | } |
127 | } |
128 | 128 | ||
129 | for (i=0; i<a->size; i++) |
129 | for (i=0; i<a->size; i++) |
130 | map_page_to_frame(a->address + i*PAGE_SIZE, a->mapping[i], flags, 0); |
130 | map_page_to_frame(a->address + i*PAGE_SIZE, a->mapping[i], flags, 0); |
131 | 131 | ||
132 | spinlock_unlock(&a->lock); |
132 | spinlock_unlock(&a->lock); |
133 | cpu_priority_restore(pri); |
133 | cpu_priority_restore(pri); |
134 | } |
134 | } |
135 | 135 | ||
136 | void vm_area_unmap(vm_area_t *a) |
136 | void vm_area_unmap(vm_area_t *a) |
137 | { |
137 | { |
138 | int i; |
138 | int i; |
139 | pri_t pri; |
139 | pri_t pri; |
140 | 140 | ||
141 | pri = cpu_priority_high(); |
141 | pri = cpu_priority_high(); |
142 | spinlock_lock(&a->lock); |
142 | spinlock_lock(&a->lock); |
143 | 143 | ||
144 | for (i=0; i<a->size; i++) |
144 | for (i=0; i<a->size; i++) |
145 | map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, 0); |
145 | map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, 0); |
146 | 146 | ||
147 | spinlock_unlock(&a->lock); |
147 | spinlock_unlock(&a->lock); |
148 | cpu_priority_restore(pri); |
148 | cpu_priority_restore(pri); |
149 | } |
149 | } |
150 | 150 | ||
151 | void vm_install(vm_t *m) |
151 | void vm_install(vm_t *m) |
152 | { |
152 | { |
153 | link_t *l; |
153 | link_t *l; |
154 | pri_t pri; |
154 | pri_t pri; |
155 | 155 | ||
156 | pri = cpu_priority_high(); |
156 | pri = cpu_priority_high(); |
157 | spinlock_lock(&m->lock); |
157 | spinlock_lock(&m->lock); |
158 | 158 | ||
159 | for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next) |
159 | for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next) |
160 | vm_area_map(list_get_instance(l, vm_area_t, link)); |
160 | vm_area_map(list_get_instance(l, vm_area_t, link)); |
161 | 161 | ||
162 | spinlock_unlock(&m->lock); |
162 | spinlock_unlock(&m->lock); |
163 | cpu_priority_restore(pri); |
163 | cpu_priority_restore(pri); |
164 | } |
164 | } |
165 | 165 | ||
166 | void vm_uninstall(vm_t *m) |
166 | void vm_uninstall(vm_t *m) |
167 | { |
167 | { |
168 | link_t *l; |
168 | link_t *l; |
169 | pri_t pri; |
169 | pri_t pri; |
170 | 170 | ||
171 | pri = cpu_priority_high(); |
171 | pri = cpu_priority_high(); |
172 | 172 | ||
173 | tlb_shutdown_start(); |
173 | tlb_shootdown_start(); |
174 | 174 | ||
175 | spinlock_lock(&m->lock); |
175 | spinlock_lock(&m->lock); |
176 | 176 | ||
177 | for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next) |
177 | for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next) |
178 | vm_area_unmap(list_get_instance(l, vm_area_t, link)); |
178 | vm_area_unmap(list_get_instance(l, vm_area_t, link)); |
179 | 179 | ||
180 | spinlock_unlock(&m->lock); |
180 | spinlock_unlock(&m->lock); |
181 | 181 | ||
182 | tlb_invalidate(0); |
182 | tlb_invalidate(0); |
183 | tlb_shutdown_finalize(); |
183 | tlb_shootdown_finalize(); |
184 | 184 | ||
185 | cpu_priority_restore(pri); |
185 | cpu_priority_restore(pri); |
186 | } |
186 | } |
187 | 187 |