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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2006 Jakub Jermar |
2 | * Copyright (C) 2001-2006 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 | /* |
29 | /* |
30 | * This file contains address space manipulation functions. |
30 | * This file contains address space manipulation functions. |
31 | * Roughly speaking, this is a higher-level client of |
31 | * Roughly speaking, this is a higher-level client of |
32 | * Virtual Address Translation (VAT) subsystem. |
32 | * Virtual Address Translation (VAT) subsystem. |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <mm/as.h> |
35 | #include <mm/as.h> |
36 | #include <arch/mm/as.h> |
36 | #include <arch/mm/as.h> |
37 | #include <mm/page.h> |
37 | #include <mm/page.h> |
38 | #include <mm/frame.h> |
38 | #include <mm/frame.h> |
39 | #include <mm/tlb.h> |
39 | #include <mm/tlb.h> |
40 | #include <mm/heap.h> |
40 | #include <mm/heap.h> |
41 | #include <arch/mm/page.h> |
41 | #include <arch/mm/page.h> |
42 | #include <genarch/mm/page_pt.h> |
42 | #include <genarch/mm/page_pt.h> |
43 | #include <mm/asid.h> |
43 | #include <mm/asid.h> |
44 | #include <arch/mm/asid.h> |
44 | #include <arch/mm/asid.h> |
45 | #include <arch/types.h> |
45 | #include <arch/types.h> |
46 | #include <typedefs.h> |
46 | #include <typedefs.h> |
47 | #include <synch/spinlock.h> |
47 | #include <synch/spinlock.h> |
48 | #include <config.h> |
48 | #include <config.h> |
49 | #include <list.h> |
49 | #include <adt/list.h> |
50 | #include <panic.h> |
50 | #include <panic.h> |
51 | #include <arch/asm.h> |
51 | #include <arch/asm.h> |
52 | #include <debug.h> |
52 | #include <debug.h> |
53 | #include <memstr.h> |
53 | #include <memstr.h> |
54 | #include <arch.h> |
54 | #include <arch.h> |
55 | #include <print.h> |
55 | #include <print.h> |
56 | 56 | ||
57 | as_operations_t *as_operations = NULL; |
57 | as_operations_t *as_operations = NULL; |
58 | 58 | ||
59 | /** Kernel address space. */ |
59 | /** Kernel address space. */ |
60 | as_t *AS_KERNEL = NULL; |
60 | as_t *AS_KERNEL = NULL; |
61 | 61 | ||
62 | static int get_area_flags(as_area_t *a); |
62 | static int get_area_flags(as_area_t *a); |
63 | 63 | ||
64 | /** Initialize address space subsystem. */ |
64 | /** Initialize address space subsystem. */ |
65 | void as_init(void) |
65 | void as_init(void) |
66 | { |
66 | { |
67 | as_arch_init(); |
67 | as_arch_init(); |
68 | AS_KERNEL = as_create(FLAG_AS_KERNEL | FLAG_AS_EARLYMALLOC); |
68 | AS_KERNEL = as_create(FLAG_AS_KERNEL | FLAG_AS_EARLYMALLOC); |
69 | if (!AS_KERNEL) |
69 | if (!AS_KERNEL) |
70 | panic("can't create kernel address space\n"); |
70 | panic("can't create kernel address space\n"); |
71 | } |
71 | } |
72 | 72 | ||
73 | /** Create address space. |
73 | /** Create address space. |
74 | * |
74 | * |
75 | * @param flags Flags that influence way in wich the address space is created. |
75 | * @param flags Flags that influence way in wich the address space is created. |
76 | */ |
76 | */ |
77 | as_t *as_create(int flags) |
77 | as_t *as_create(int flags) |
78 | { |
78 | { |
79 | as_t *as; |
79 | as_t *as; |
80 | 80 | ||
81 | if (flags & FLAG_AS_EARLYMALLOC) |
81 | if (flags & FLAG_AS_EARLYMALLOC) |
82 | as = (as_t *) early_malloc(sizeof(as_t)); |
82 | as = (as_t *) early_malloc(sizeof(as_t)); |
83 | else |
83 | else |
84 | as = (as_t *) malloc(sizeof(as_t)); |
84 | as = (as_t *) malloc(sizeof(as_t)); |
85 | if (as) { |
85 | if (as) { |
86 | list_initialize(&as->as_with_asid_link); |
86 | list_initialize(&as->as_with_asid_link); |
87 | spinlock_initialize(&as->lock, "as_lock"); |
87 | spinlock_initialize(&as->lock, "as_lock"); |
88 | list_initialize(&as->as_area_head); |
88 | list_initialize(&as->as_area_head); |
89 | 89 | ||
90 | if (flags & FLAG_AS_KERNEL) |
90 | if (flags & FLAG_AS_KERNEL) |
91 | as->asid = ASID_KERNEL; |
91 | as->asid = ASID_KERNEL; |
92 | else |
92 | else |
93 | as->asid = ASID_INVALID; |
93 | as->asid = ASID_INVALID; |
94 | 94 | ||
95 | as->page_table = page_table_create(flags); |
95 | as->page_table = page_table_create(flags); |
96 | } |
96 | } |
97 | 97 | ||
98 | return as; |
98 | return as; |
99 | } |
99 | } |
100 | 100 | ||
101 | /** Create address space area of common attributes. |
101 | /** Create address space area of common attributes. |
102 | * |
102 | * |
103 | * The created address space area is added to the target address space. |
103 | * The created address space area is added to the target address space. |
104 | * |
104 | * |
105 | * @param as Target address space. |
105 | * @param as Target address space. |
106 | * @param type Type of area. |
106 | * @param type Type of area. |
107 | * @param size Size of area in multiples of PAGE_SIZE. |
107 | * @param size Size of area in multiples of PAGE_SIZE. |
108 | * @param base Base address of area. |
108 | * @param base Base address of area. |
109 | * |
109 | * |
110 | * @return Address space area on success or NULL on failure. |
110 | * @return Address space area on success or NULL on failure. |
111 | */ |
111 | */ |
112 | as_area_t *as_area_create(as_t *as, as_area_type_t type, size_t size, __address base) |
112 | as_area_t *as_area_create(as_t *as, as_area_type_t type, size_t size, __address base) |
113 | { |
113 | { |
114 | ipl_t ipl; |
114 | ipl_t ipl; |
115 | as_area_t *a; |
115 | as_area_t *a; |
116 | 116 | ||
117 | if (base % PAGE_SIZE) |
117 | if (base % PAGE_SIZE) |
118 | panic("addr not aligned to a page boundary"); |
118 | panic("addr not aligned to a page boundary"); |
119 | 119 | ||
120 | ipl = interrupts_disable(); |
120 | ipl = interrupts_disable(); |
121 | spinlock_lock(&as->lock); |
121 | spinlock_lock(&as->lock); |
122 | 122 | ||
123 | /* |
123 | /* |
124 | * TODO: test as_area which is to be created doesn't overlap with an existing one. |
124 | * TODO: test as_area which is to be created doesn't overlap with an existing one. |
125 | */ |
125 | */ |
126 | 126 | ||
127 | a = (as_area_t *) malloc(sizeof(as_area_t)); |
127 | a = (as_area_t *) malloc(sizeof(as_area_t)); |
128 | if (a) { |
128 | if (a) { |
129 | spinlock_initialize(&a->lock, "as_area_lock"); |
129 | spinlock_initialize(&a->lock, "as_area_lock"); |
130 | 130 | ||
131 | link_initialize(&a->link); |
131 | link_initialize(&a->link); |
132 | a->type = type; |
132 | a->type = type; |
133 | a->size = size; |
133 | a->size = size; |
134 | a->base = base; |
134 | a->base = base; |
135 | 135 | ||
136 | list_append(&a->link, &as->as_area_head); |
136 | list_append(&a->link, &as->as_area_head); |
137 | } |
137 | } |
138 | 138 | ||
139 | spinlock_unlock(&as->lock); |
139 | spinlock_unlock(&as->lock); |
140 | interrupts_restore(ipl); |
140 | interrupts_restore(ipl); |
141 | 141 | ||
142 | return a; |
142 | return a; |
143 | } |
143 | } |
144 | 144 | ||
145 | /** Initialize mapping for one page of address space. |
145 | /** Initialize mapping for one page of address space. |
146 | * |
146 | * |
147 | * This functions maps 'page' to 'frame' according |
147 | * This functions maps 'page' to 'frame' according |
148 | * to attributes of the address space area to |
148 | * to attributes of the address space area to |
149 | * wich 'page' belongs. |
149 | * wich 'page' belongs. |
150 | * |
150 | * |
151 | * @param a Target address space. |
151 | * @param a Target address space. |
152 | * @param page Virtual page within the area. |
152 | * @param page Virtual page within the area. |
153 | * @param frame Physical frame to which page will be mapped. |
153 | * @param frame Physical frame to which page will be mapped. |
154 | */ |
154 | */ |
155 | void as_set_mapping(as_t *as, __address page, __address frame) |
155 | void as_set_mapping(as_t *as, __address page, __address frame) |
156 | { |
156 | { |
157 | as_area_t *a, *area = NULL; |
157 | as_area_t *a, *area = NULL; |
158 | link_t *cur; |
158 | link_t *cur; |
159 | ipl_t ipl; |
159 | ipl_t ipl; |
160 | 160 | ||
161 | ipl = interrupts_disable(); |
161 | ipl = interrupts_disable(); |
162 | spinlock_lock(&as->lock); |
162 | spinlock_lock(&as->lock); |
163 | 163 | ||
164 | /* |
164 | /* |
165 | * First, try locate an area. |
165 | * First, try locate an area. |
166 | */ |
166 | */ |
167 | for (cur = as->as_area_head.next; cur != &as->as_area_head; cur = cur->next) { |
167 | for (cur = as->as_area_head.next; cur != &as->as_area_head; cur = cur->next) { |
168 | a = list_get_instance(cur, as_area_t, link); |
168 | a = list_get_instance(cur, as_area_t, link); |
169 | spinlock_lock(&a->lock); |
169 | spinlock_lock(&a->lock); |
170 | 170 | ||
171 | if ((page >= a->base) && (page < a->base + a->size * PAGE_SIZE)) { |
171 | if ((page >= a->base) && (page < a->base + a->size * PAGE_SIZE)) { |
172 | area = a; |
172 | area = a; |
173 | break; |
173 | break; |
174 | } |
174 | } |
175 | 175 | ||
176 | spinlock_unlock(&a->lock); |
176 | spinlock_unlock(&a->lock); |
177 | } |
177 | } |
178 | 178 | ||
179 | if (!area) { |
179 | if (!area) { |
180 | panic("page not part of any as_area\n"); |
180 | panic("page not part of any as_area\n"); |
181 | } |
181 | } |
182 | 182 | ||
183 | /* |
183 | /* |
184 | * Note: area->lock is held. |
184 | * Note: area->lock is held. |
185 | */ |
185 | */ |
186 | 186 | ||
187 | page_mapping_insert(as, page, frame, get_area_flags(area)); |
187 | page_mapping_insert(as, page, frame, get_area_flags(area)); |
188 | 188 | ||
189 | spinlock_unlock(&area->lock); |
189 | spinlock_unlock(&area->lock); |
190 | spinlock_unlock(&as->lock); |
190 | spinlock_unlock(&as->lock); |
191 | interrupts_restore(ipl); |
191 | interrupts_restore(ipl); |
192 | } |
192 | } |
193 | 193 | ||
194 | /** Handle page fault within the current address space. |
194 | /** Handle page fault within the current address space. |
195 | * |
195 | * |
196 | * This is the high-level page fault handler. |
196 | * This is the high-level page fault handler. |
197 | * Interrupts are assumed disabled. |
197 | * Interrupts are assumed disabled. |
198 | * |
198 | * |
199 | * @param page Faulting page. |
199 | * @param page Faulting page. |
200 | * |
200 | * |
201 | * @return 0 on page fault, 1 on success. |
201 | * @return 0 on page fault, 1 on success. |
202 | */ |
202 | */ |
203 | int as_page_fault(__address page) |
203 | int as_page_fault(__address page) |
204 | { |
204 | { |
205 | link_t *cur; |
205 | link_t *cur; |
206 | as_area_t *a, *area = NULL; |
206 | as_area_t *a, *area = NULL; |
207 | __address frame; |
207 | __address frame; |
208 | 208 | ||
209 | ASSERT(AS); |
209 | ASSERT(AS); |
210 | spinlock_lock(&AS->lock); |
210 | spinlock_lock(&AS->lock); |
211 | 211 | ||
212 | /* |
212 | /* |
213 | * Search this areas of this address space for presence of 'page'. |
213 | * Search this areas of this address space for presence of 'page'. |
214 | */ |
214 | */ |
215 | for (cur = AS->as_area_head.next; cur != &AS->as_area_head; cur = cur->next) { |
215 | for (cur = AS->as_area_head.next; cur != &AS->as_area_head; cur = cur->next) { |
216 | a = list_get_instance(cur, as_area_t, link); |
216 | a = list_get_instance(cur, as_area_t, link); |
217 | spinlock_lock(&a->lock); |
217 | spinlock_lock(&a->lock); |
218 | 218 | ||
219 | if ((page >= a->base) && (page < a->base + a->size * PAGE_SIZE)) { |
219 | if ((page >= a->base) && (page < a->base + a->size * PAGE_SIZE)) { |
220 | 220 | ||
221 | /* |
221 | /* |
222 | * We found the area containing 'page'. |
222 | * We found the area containing 'page'. |
223 | * TODO: access checking |
223 | * TODO: access checking |
224 | */ |
224 | */ |
225 | area = a; |
225 | area = a; |
226 | break; |
226 | break; |
227 | } |
227 | } |
228 | 228 | ||
229 | spinlock_unlock(&a->lock); |
229 | spinlock_unlock(&a->lock); |
230 | } |
230 | } |
231 | 231 | ||
232 | if (!area) { |
232 | if (!area) { |
233 | /* |
233 | /* |
234 | * No area contained mapping for 'page'. |
234 | * No area contained mapping for 'page'. |
235 | * Signal page fault to low-level handler. |
235 | * Signal page fault to low-level handler. |
236 | */ |
236 | */ |
237 | spinlock_unlock(&AS->lock); |
237 | spinlock_unlock(&AS->lock); |
238 | return 0; |
238 | return 0; |
239 | } |
239 | } |
240 | 240 | ||
241 | /* |
241 | /* |
242 | * Note: area->lock is held. |
242 | * Note: area->lock is held. |
243 | */ |
243 | */ |
244 | 244 | ||
245 | /* |
245 | /* |
246 | * In general, there can be several reasons that |
246 | * In general, there can be several reasons that |
247 | * can have caused this fault. |
247 | * can have caused this fault. |
248 | * |
248 | * |
249 | * - non-existent mapping: the area is a scratch |
249 | * - non-existent mapping: the area is a scratch |
250 | * area (e.g. stack) and so far has not been |
250 | * area (e.g. stack) and so far has not been |
251 | * allocated a frame for the faulting page |
251 | * allocated a frame for the faulting page |
252 | * |
252 | * |
253 | * - non-present mapping: another possibility, |
253 | * - non-present mapping: another possibility, |
254 | * currently not implemented, would be frame |
254 | * currently not implemented, would be frame |
255 | * reuse; when this becomes a possibility, |
255 | * reuse; when this becomes a possibility, |
256 | * do not forget to distinguish between |
256 | * do not forget to distinguish between |
257 | * the different causes |
257 | * the different causes |
258 | */ |
258 | */ |
259 | frame = frame_alloc(ONE_FRAME, 0); |
259 | frame = frame_alloc(ONE_FRAME, 0); |
260 | memsetb(PA2KA(frame), FRAME_SIZE, 0); |
260 | memsetb(PA2KA(frame), FRAME_SIZE, 0); |
261 | 261 | ||
262 | /* |
262 | /* |
263 | * Map 'page' to 'frame'. |
263 | * Map 'page' to 'frame'. |
264 | * Note that TLB shootdown is not attempted as only new information is being |
264 | * Note that TLB shootdown is not attempted as only new information is being |
265 | * inserted into page tables. |
265 | * inserted into page tables. |
266 | */ |
266 | */ |
267 | page_mapping_insert(AS, page, frame, get_area_flags(area)); |
267 | page_mapping_insert(AS, page, frame, get_area_flags(area)); |
268 | 268 | ||
269 | spinlock_unlock(&area->lock); |
269 | spinlock_unlock(&area->lock); |
270 | spinlock_unlock(&AS->lock); |
270 | spinlock_unlock(&AS->lock); |
271 | 271 | ||
272 | return 1; |
272 | return 1; |
273 | } |
273 | } |
274 | 274 | ||
275 | /** Install address space on CPU. |
275 | /** Install address space on CPU. |
276 | * |
276 | * |
277 | * @param as Address space. |
277 | * @param as Address space. |
278 | */ |
278 | */ |
279 | void as_install(as_t *as) |
279 | void as_install(as_t *as) |
280 | { |
280 | { |
281 | ipl_t ipl; |
281 | ipl_t ipl; |
282 | 282 | ||
283 | asid_install(as); |
283 | asid_install(as); |
284 | 284 | ||
285 | ipl = interrupts_disable(); |
285 | ipl = interrupts_disable(); |
286 | spinlock_lock(&as->lock); |
286 | spinlock_lock(&as->lock); |
287 | ASSERT(as->page_table); |
287 | ASSERT(as->page_table); |
288 | SET_PTL0_ADDRESS(as->page_table); |
288 | SET_PTL0_ADDRESS(as->page_table); |
289 | spinlock_unlock(&as->lock); |
289 | spinlock_unlock(&as->lock); |
290 | interrupts_restore(ipl); |
290 | interrupts_restore(ipl); |
291 | 291 | ||
292 | /* |
292 | /* |
293 | * Perform architecture-specific steps. |
293 | * Perform architecture-specific steps. |
294 | * (e.g. write ASID to hardware register etc.) |
294 | * (e.g. write ASID to hardware register etc.) |
295 | */ |
295 | */ |
296 | as_install_arch(as); |
296 | as_install_arch(as); |
297 | 297 | ||
298 | AS = as; |
298 | AS = as; |
299 | } |
299 | } |
300 | 300 | ||
301 | /** Compute flags for virtual address translation subsytem. |
301 | /** Compute flags for virtual address translation subsytem. |
302 | * |
302 | * |
303 | * The address space area must be locked. |
303 | * The address space area must be locked. |
304 | * Interrupts must be disabled. |
304 | * Interrupts must be disabled. |
305 | * |
305 | * |
306 | * @param a Address space area. |
306 | * @param a Address space area. |
307 | * |
307 | * |
308 | * @return Flags to be used in page_mapping_insert(). |
308 | * @return Flags to be used in page_mapping_insert(). |
309 | */ |
309 | */ |
310 | int get_area_flags(as_area_t *a) |
310 | int get_area_flags(as_area_t *a) |
311 | { |
311 | { |
312 | int flags; |
312 | int flags; |
313 | 313 | ||
314 | switch (a->type) { |
314 | switch (a->type) { |
315 | case AS_AREA_TEXT: |
315 | case AS_AREA_TEXT: |
316 | flags = PAGE_EXEC | PAGE_READ | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
316 | flags = PAGE_EXEC | PAGE_READ | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
317 | break; |
317 | break; |
318 | case AS_AREA_DATA: |
318 | case AS_AREA_DATA: |
319 | case AS_AREA_STACK: |
319 | case AS_AREA_STACK: |
320 | flags = PAGE_READ | PAGE_WRITE | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
320 | flags = PAGE_READ | PAGE_WRITE | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE; |
321 | break; |
321 | break; |
322 | default: |
322 | default: |
323 | panic("unexpected as_area_type_t %d", a->type); |
323 | panic("unexpected as_area_type_t %d", a->type); |
324 | } |
324 | } |
325 | 325 | ||
326 | return flags; |
326 | return flags; |
327 | } |
327 | } |
328 | 328 | ||
329 | /** Create page table. |
329 | /** Create page table. |
330 | * |
330 | * |
331 | * Depending on architecture, create either address space |
331 | * Depending on architecture, create either address space |
332 | * private or global page table. |
332 | * private or global page table. |
333 | * |
333 | * |
334 | * @param flags Flags saying whether the page table is for kernel address space. |
334 | * @param flags Flags saying whether the page table is for kernel address space. |
335 | * |
335 | * |
336 | * @return First entry of the page table. |
336 | * @return First entry of the page table. |
337 | */ |
337 | */ |
338 | pte_t *page_table_create(int flags) |
338 | pte_t *page_table_create(int flags) |
339 | { |
339 | { |
340 | ASSERT(as_operations); |
340 | ASSERT(as_operations); |
341 | ASSERT(as_operations->page_table_create); |
341 | ASSERT(as_operations->page_table_create); |
342 | 342 | ||
343 | return as_operations->page_table_create(flags); |
343 | return as_operations->page_table_create(flags); |
344 | } |
344 | } |
345 | 345 |