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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2005 Jakub Jermar |
2 | * Copyright (c) 2001-2005 Jakub Jermar |
3 | * Copyright (c) 2005 Sergey Bondari |
3 | * Copyright (c) 2005 Sergey Bondari |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | /** @addtogroup genericmm |
30 | /** @addtogroup genericmm |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | 33 | ||
34 | /** |
34 | /** |
35 | * @file |
35 | * @file |
36 | * @brief Physical frame allocator. |
36 | * @brief Physical frame allocator. |
37 | * |
37 | * |
38 | * This file contains the physical frame allocator and memory zone management. |
38 | * This file contains the physical frame allocator and memory zone management. |
39 | * The frame allocator is built on top of the buddy allocator. |
39 | * The frame allocator is built on top of the buddy allocator. |
40 | * |
40 | * |
41 | * @see buddy.c |
41 | * @see buddy.c |
42 | */ |
42 | */ |
43 | 43 | ||
44 | /* |
44 | /* |
45 | * Locking order |
45 | * Locking order |
46 | * |
46 | * |
47 | * In order to access particular zone, the process must first lock |
47 | * In order to access particular zone, the process must first lock |
48 | * the zones.lock, then lock the zone and then unlock the zones.lock. |
48 | * the zones.lock, then lock the zone and then unlock the zones.lock. |
49 | * This insures, that we can fiddle with the zones in runtime without |
49 | * This insures, that we can fiddle with the zones in runtime without |
50 | * affecting the processes. |
50 | * affecting the processes. |
51 | * |
51 | * |
52 | */ |
52 | */ |
53 | 53 | ||
54 | #include <arch/types.h> |
54 | #include <arch/types.h> |
55 | #include <mm/frame.h> |
55 | #include <mm/frame.h> |
56 | #include <mm/as.h> |
56 | #include <mm/as.h> |
57 | #include <panic.h> |
57 | #include <panic.h> |
58 | #include <debug.h> |
58 | #include <debug.h> |
59 | #include <adt/list.h> |
59 | #include <adt/list.h> |
60 | #include <synch/spinlock.h> |
60 | #include <synch/spinlock.h> |
61 | #include <arch/asm.h> |
61 | #include <arch/asm.h> |
62 | #include <arch.h> |
62 | #include <arch.h> |
63 | #include <print.h> |
63 | #include <print.h> |
64 | #include <align.h> |
64 | #include <align.h> |
65 | #include <mm/slab.h> |
65 | #include <mm/slab.h> |
66 | #include <bitops.h> |
66 | #include <bitops.h> |
67 | #include <macros.h> |
67 | #include <macros.h> |
68 | #include <config.h> |
68 | #include <config.h> |
69 | 69 | ||
70 | typedef struct { |
70 | typedef struct { |
71 | count_t refcount; /**< tracking of shared frames */ |
71 | count_t refcount; /**< tracking of shared frames */ |
72 | uint8_t buddy_order; /**< buddy system block order */ |
72 | uint8_t buddy_order; /**< buddy system block order */ |
73 | link_t buddy_link; /**< link to the next free block inside one |
73 | link_t buddy_link; /**< link to the next free block inside one |
74 | order */ |
74 | order */ |
75 | void *parent; /**< If allocated by slab, this points there */ |
75 | void *parent; /**< If allocated by slab, this points there */ |
76 | } frame_t; |
76 | } frame_t; |
77 | 77 | ||
78 | typedef struct { |
78 | typedef struct { |
79 | SPINLOCK_DECLARE(lock); /**< this lock protects everything below */ |
79 | SPINLOCK_DECLARE(lock); /**< this lock protects everything below */ |
80 | pfn_t base; /**< frame_no of the first frame in the frames |
80 | pfn_t base; /**< frame_no of the first frame in the frames |
81 | array */ |
81 | array */ |
82 | count_t count; /**< Size of zone */ |
82 | count_t count; /**< Size of zone */ |
83 | 83 | ||
84 | frame_t *frames; /**< array of frame_t structures in this |
84 | frame_t *frames; /**< array of frame_t structures in this |
85 | zone */ |
85 | zone */ |
86 | count_t free_count; /**< number of free frame_t structures */ |
86 | count_t free_count; /**< number of free frame_t structures */ |
87 | count_t busy_count; /**< number of busy frame_t structures */ |
87 | count_t busy_count; /**< number of busy frame_t structures */ |
88 | 88 | ||
89 | buddy_system_t *buddy_system; /**< buddy system for the zone */ |
89 | buddy_system_t *buddy_system; /**< buddy system for the zone */ |
90 | int flags; |
90 | int flags; |
91 | } zone_t; |
91 | } zone_t; |
92 | 92 | ||
93 | /* |
93 | /* |
94 | * The zoneinfo.lock must be locked when accessing zoneinfo structure. |
94 | * The zoneinfo.lock must be locked when accessing zoneinfo structure. |
95 | * Some of the attributes in zone_t structures are 'read-only' |
95 | * Some of the attributes in zone_t structures are 'read-only' |
96 | */ |
96 | */ |
97 | 97 | ||
98 | typedef struct { |
98 | typedef struct { |
99 | SPINLOCK_DECLARE(lock); |
99 | SPINLOCK_DECLARE(lock); |
100 | unsigned int count; |
100 | unsigned int count; |
101 | zone_t *info[ZONES_MAX]; |
101 | zone_t *info[ZONES_MAX]; |
102 | } zones_t; |
102 | } zones_t; |
103 | 103 | ||
104 | static zones_t zones; |
104 | static zones_t zones; |
105 | 105 | ||
106 | 106 | ||
107 | /********************/ |
107 | /********************/ |
108 | /* Helper functions */ |
108 | /* Helper functions */ |
109 | /********************/ |
109 | /********************/ |
110 | 110 | ||
111 | static inline index_t frame_index(zone_t *zone, frame_t *frame) |
111 | static inline index_t frame_index(zone_t *zone, frame_t *frame) |
112 | { |
112 | { |
113 | return (index_t) (frame - zone->frames); |
113 | return (index_t) (frame - zone->frames); |
114 | } |
114 | } |
115 | 115 | ||
116 | static inline index_t frame_index_abs(zone_t *zone, frame_t *frame) |
116 | static inline index_t frame_index_abs(zone_t *zone, frame_t *frame) |
117 | { |
117 | { |
118 | return (index_t) (frame - zone->frames) + zone->base; |
118 | return (index_t) (frame - zone->frames) + zone->base; |
119 | } |
119 | } |
120 | 120 | ||
121 | static inline int frame_index_valid(zone_t *zone, index_t index) |
121 | static inline int frame_index_valid(zone_t *zone, index_t index) |
122 | { |
122 | { |
123 | return (index >= 0) && (index < zone->count); |
123 | return (index < zone->count); |
124 | } |
124 | } |
125 | 125 | ||
126 | /** Compute pfn_t from frame_t pointer & zone pointer */ |
126 | /** Compute pfn_t from frame_t pointer & zone pointer */ |
127 | static index_t make_frame_index(zone_t *zone, frame_t *frame) |
127 | static index_t make_frame_index(zone_t *zone, frame_t *frame) |
128 | { |
128 | { |
129 | return (frame - zone->frames); |
129 | return (frame - zone->frames); |
130 | } |
130 | } |
131 | 131 | ||
132 | /** Initialize frame structure |
132 | /** Initialize frame structure |
133 | * |
133 | * |
134 | * Initialize frame structure. |
134 | * Initialize frame structure. |
135 | * |
135 | * |
136 | * @param frame Frame structure to be initialized. |
136 | * @param frame Frame structure to be initialized. |
137 | */ |
137 | */ |
138 | static void frame_initialize(frame_t *frame) |
138 | static void frame_initialize(frame_t *frame) |
139 | { |
139 | { |
140 | frame->refcount = 1; |
140 | frame->refcount = 1; |
141 | frame->buddy_order = 0; |
141 | frame->buddy_order = 0; |
142 | } |
142 | } |
143 | 143 | ||
144 | /**********************/ |
144 | /**********************/ |
145 | /* Zoneinfo functions */ |
145 | /* Zoneinfo functions */ |
146 | /**********************/ |
146 | /**********************/ |
147 | 147 | ||
148 | /** |
148 | /** |
149 | * Insert-sort zone into zones list |
149 | * Insert-sort zone into zones list |
150 | * |
150 | * |
151 | * @param newzone New zone to be inserted into zone list |
151 | * @param newzone New zone to be inserted into zone list |
152 | * @return zone number on success, -1 on error |
152 | * @return zone number on success, -1 on error |
153 | */ |
153 | */ |
154 | static int zones_add_zone(zone_t *newzone) |
154 | static int zones_add_zone(zone_t *newzone) |
155 | { |
155 | { |
156 | unsigned int i, j; |
156 | unsigned int i, j; |
157 | ipl_t ipl; |
157 | ipl_t ipl; |
158 | zone_t *z; |
158 | zone_t *z; |
159 | 159 | ||
160 | ipl = interrupts_disable(); |
160 | ipl = interrupts_disable(); |
161 | spinlock_lock(&zones.lock); |
161 | spinlock_lock(&zones.lock); |
162 | 162 | ||
163 | /* Try to merge */ |
163 | /* Try to merge */ |
164 | if (zones.count + 1 == ZONES_MAX) { |
164 | if (zones.count + 1 == ZONES_MAX) { |
165 | printf("Maximum zone count %u exceeded!\n", ZONES_MAX); |
165 | printf("Maximum zone count %u exceeded!\n", ZONES_MAX); |
166 | spinlock_unlock(&zones.lock); |
166 | spinlock_unlock(&zones.lock); |
167 | interrupts_restore(ipl); |
167 | interrupts_restore(ipl); |
168 | return -1; |
168 | return -1; |
169 | } |
169 | } |
170 | 170 | ||
171 | for (i = 0; i < zones.count; i++) { |
171 | for (i = 0; i < zones.count; i++) { |
172 | /* Check for overflow */ |
172 | /* Check for overflow */ |
173 | z = zones.info[i]; |
173 | z = zones.info[i]; |
174 | if (overlaps(newzone->base, newzone->count, z->base, z->count)) { |
174 | if (overlaps(newzone->base, newzone->count, z->base, z->count)) { |
175 | printf("Zones overlap!\n"); |
175 | printf("Zones overlap!\n"); |
176 | return -1; |
176 | return -1; |
177 | } |
177 | } |
178 | if (newzone->base < z->base) |
178 | if (newzone->base < z->base) |
179 | break; |
179 | break; |
180 | } |
180 | } |
181 | 181 | ||
182 | /* Move other zones up */ |
182 | /* Move other zones up */ |
183 | for (j = i; j < zones.count; j++) |
183 | for (j = i; j < zones.count; j++) |
184 | zones.info[j + 1] = zones.info[j]; |
184 | zones.info[j + 1] = zones.info[j]; |
185 | 185 | ||
186 | zones.info[i] = newzone; |
186 | zones.info[i] = newzone; |
187 | zones.count++; |
187 | zones.count++; |
188 | 188 | ||
189 | spinlock_unlock(&zones.lock); |
189 | spinlock_unlock(&zones.lock); |
190 | interrupts_restore(ipl); |
190 | interrupts_restore(ipl); |
191 | 191 | ||
192 | return i; |
192 | return i; |
193 | } |
193 | } |
194 | 194 | ||
195 | /** |
195 | /** |
196 | * Try to find a zone where can we find the frame |
196 | * Try to find a zone where can we find the frame |
197 | * |
197 | * |
198 | * Assume interrupts are disabled. |
198 | * Assume interrupts are disabled. |
199 | * |
199 | * |
200 | * @param frame Frame number contained in zone |
200 | * @param frame Frame number contained in zone |
201 | * @param pzone If not null, it is used as zone hint. Zone index |
201 | * @param pzone If not null, it is used as zone hint. Zone index |
202 | * is filled into the variable on success. |
202 | * is filled into the variable on success. |
203 | * @return Pointer to locked zone containing frame |
203 | * @return Pointer to locked zone containing frame |
204 | */ |
204 | */ |
205 | static zone_t * find_zone_and_lock(pfn_t frame, unsigned int *pzone) |
205 | static zone_t * find_zone_and_lock(pfn_t frame, unsigned int *pzone) |
206 | { |
206 | { |
207 | unsigned int i; |
207 | unsigned int i; |
208 | unsigned int hint = pzone ? *pzone : 0; |
208 | unsigned int hint = pzone ? *pzone : 0; |
209 | zone_t *z; |
209 | zone_t *z; |
210 | 210 | ||
211 | spinlock_lock(&zones.lock); |
211 | spinlock_lock(&zones.lock); |
212 | 212 | ||
213 | if (hint >= zones.count || hint < 0) |
213 | if (hint >= zones.count) |
214 | hint = 0; |
214 | hint = 0; |
215 | 215 | ||
216 | i = hint; |
216 | i = hint; |
217 | do { |
217 | do { |
218 | z = zones.info[i]; |
218 | z = zones.info[i]; |
219 | spinlock_lock(&z->lock); |
219 | spinlock_lock(&z->lock); |
220 | if (z->base <= frame && z->base + z->count > frame) { |
220 | if (z->base <= frame && z->base + z->count > frame) { |
221 | /* Unlock the global lock */ |
221 | /* Unlock the global lock */ |
222 | spinlock_unlock(&zones.lock); |
222 | spinlock_unlock(&zones.lock); |
223 | if (pzone) |
223 | if (pzone) |
224 | *pzone = i; |
224 | *pzone = i; |
225 | return z; |
225 | return z; |
226 | } |
226 | } |
227 | spinlock_unlock(&z->lock); |
227 | spinlock_unlock(&z->lock); |
228 | 228 | ||
229 | i++; |
229 | i++; |
230 | if (i >= zones.count) |
230 | if (i >= zones.count) |
231 | i = 0; |
231 | i = 0; |
232 | } while(i != hint); |
232 | } while(i != hint); |
233 | 233 | ||
234 | spinlock_unlock(&zones.lock); |
234 | spinlock_unlock(&zones.lock); |
235 | return NULL; |
235 | return NULL; |
236 | } |
236 | } |
237 | 237 | ||
238 | /** @return True if zone can allocate specified order */ |
238 | /** @return True if zone can allocate specified order */ |
239 | static int zone_can_alloc(zone_t *z, uint8_t order) |
239 | static int zone_can_alloc(zone_t *z, uint8_t order) |
240 | { |
240 | { |
241 | return buddy_system_can_alloc(z->buddy_system, order); |
241 | return buddy_system_can_alloc(z->buddy_system, order); |
242 | } |
242 | } |
243 | 243 | ||
244 | /** Find and lock zone that can allocate order frames. |
244 | /** Find and lock zone that can allocate order frames. |
245 | * |
245 | * |
246 | * Assume interrupts are disabled. |
246 | * Assume interrupts are disabled. |
247 | * |
247 | * |
248 | * @param order Size (2^order) of free space we are trying to find |
248 | * @param order Size (2^order) of free space we are trying to find |
249 | * @param pzone Pointer to preferred zone or NULL, on return contains zone |
249 | * @param pzone Pointer to preferred zone or NULL, on return contains zone |
250 | * number |
250 | * number |
251 | */ |
251 | */ |
252 | static zone_t * find_free_zone_and_lock(uint8_t order, unsigned int *pzone) |
252 | static zone_t * find_free_zone_and_lock(uint8_t order, unsigned int *pzone) |
253 | { |
253 | { |
254 | unsigned int i; |
254 | unsigned int i; |
255 | zone_t *z; |
255 | zone_t *z; |
256 | unsigned int hint = pzone ? *pzone : 0; |
256 | unsigned int hint = pzone ? *pzone : 0; |
257 | 257 | ||
258 | spinlock_lock(&zones.lock); |
258 | spinlock_lock(&zones.lock); |
259 | if (hint >= zones.count) |
259 | if (hint >= zones.count) |
260 | hint = 0; |
260 | hint = 0; |
261 | i = hint; |
261 | i = hint; |
262 | do { |
262 | do { |
263 | z = zones.info[i]; |
263 | z = zones.info[i]; |
264 | 264 | ||
265 | spinlock_lock(&z->lock); |
265 | spinlock_lock(&z->lock); |
266 | 266 | ||
267 | /* Check if the zone has 2^order frames area available */ |
267 | /* Check if the zone has 2^order frames area available */ |
268 | if (zone_can_alloc(z, order)) { |
268 | if (zone_can_alloc(z, order)) { |
269 | spinlock_unlock(&zones.lock); |
269 | spinlock_unlock(&zones.lock); |
270 | if (pzone) |
270 | if (pzone) |
271 | *pzone = i; |
271 | *pzone = i; |
272 | return z; |
272 | return z; |
273 | } |
273 | } |
274 | spinlock_unlock(&z->lock); |
274 | spinlock_unlock(&z->lock); |
275 | if (++i >= zones.count) |
275 | if (++i >= zones.count) |
276 | i = 0; |
276 | i = 0; |
277 | } while(i != hint); |
277 | } while(i != hint); |
278 | spinlock_unlock(&zones.lock); |
278 | spinlock_unlock(&zones.lock); |
279 | return NULL; |
279 | return NULL; |
280 | } |
280 | } |
281 | 281 | ||
282 | /**************************/ |
282 | /**************************/ |
283 | /* Buddy system functions */ |
283 | /* Buddy system functions */ |
284 | /**************************/ |
284 | /**************************/ |
285 | 285 | ||
286 | /** Buddy system find_block implementation |
286 | /** Buddy system find_block implementation |
287 | * |
287 | * |
288 | * Find block that is parent of current list. |
288 | * Find block that is parent of current list. |
289 | * That means go to lower addresses, until such block is found |
289 | * That means go to lower addresses, until such block is found |
290 | * |
290 | * |
291 | * @param order - Order of parent must be different then this parameter!! |
291 | * @param order - Order of parent must be different then this parameter!! |
292 | */ |
292 | */ |
293 | static link_t *zone_buddy_find_block(buddy_system_t *b, link_t *child, |
293 | static link_t *zone_buddy_find_block(buddy_system_t *b, link_t *child, |
294 | uint8_t order) |
294 | uint8_t order) |
295 | { |
295 | { |
296 | frame_t *frame; |
296 | frame_t *frame; |
297 | zone_t *zone; |
297 | zone_t *zone; |
298 | index_t index; |
298 | index_t index; |
299 | 299 | ||
300 | frame = list_get_instance(child, frame_t, buddy_link); |
300 | frame = list_get_instance(child, frame_t, buddy_link); |
301 | zone = (zone_t *) b->data; |
301 | zone = (zone_t *) b->data; |
302 | 302 | ||
303 | index = frame_index(zone, frame); |
303 | index = frame_index(zone, frame); |
304 | do { |
304 | do { |
305 | if (zone->frames[index].buddy_order != order) { |
305 | if (zone->frames[index].buddy_order != order) { |
306 | return &zone->frames[index].buddy_link; |
306 | return &zone->frames[index].buddy_link; |
307 | } |
307 | } |
308 | } while(index-- > 0); |
308 | } while(index-- > 0); |
309 | return NULL; |
309 | return NULL; |
310 | } |
310 | } |
311 | 311 | ||
312 | static void zone_buddy_print_id(buddy_system_t *b, link_t *block) |
312 | static void zone_buddy_print_id(buddy_system_t *b, link_t *block) |
313 | { |
313 | { |
314 | frame_t *frame; |
314 | frame_t *frame; |
315 | zone_t *zone; |
315 | zone_t *zone; |
316 | index_t index; |
316 | index_t index; |
317 | 317 | ||
318 | frame = list_get_instance(block, frame_t, buddy_link); |
318 | frame = list_get_instance(block, frame_t, buddy_link); |
319 | zone = (zone_t *) b->data; |
319 | zone = (zone_t *) b->data; |
320 | index = frame_index(zone, frame); |
320 | index = frame_index(zone, frame); |
321 | printf("%zd", index); |
321 | printf("%zd", index); |
322 | } |
322 | } |
323 | 323 | ||
324 | /** Buddy system find_buddy implementation |
324 | /** Buddy system find_buddy implementation |
325 | * |
325 | * |
326 | * @param b Buddy system. |
326 | * @param b Buddy system. |
327 | * @param block Block for which buddy should be found |
327 | * @param block Block for which buddy should be found |
328 | * |
328 | * |
329 | * @return Buddy for given block if found |
329 | * @return Buddy for given block if found |
330 | */ |
330 | */ |
331 | static link_t *zone_buddy_find_buddy(buddy_system_t *b, link_t *block) |
331 | static link_t *zone_buddy_find_buddy(buddy_system_t *b, link_t *block) |
332 | { |
332 | { |
333 | frame_t *frame; |
333 | frame_t *frame; |
334 | zone_t *zone; |
334 | zone_t *zone; |
335 | index_t index; |
335 | index_t index; |
336 | bool is_left, is_right; |
336 | bool is_left, is_right; |
337 | 337 | ||
338 | frame = list_get_instance(block, frame_t, buddy_link); |
338 | frame = list_get_instance(block, frame_t, buddy_link); |
339 | zone = (zone_t *) b->data; |
339 | zone = (zone_t *) b->data; |
340 | ASSERT(IS_BUDDY_ORDER_OK(frame_index_abs(zone, frame), |
340 | ASSERT(IS_BUDDY_ORDER_OK(frame_index_abs(zone, frame), |
341 | frame->buddy_order)); |
341 | frame->buddy_order)); |
342 | 342 | ||
343 | is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame); |
343 | is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame); |
344 | is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame); |
344 | is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame); |
345 | 345 | ||
346 | ASSERT(is_left ^ is_right); |
346 | ASSERT(is_left ^ is_right); |
347 | if (is_left) { |
347 | if (is_left) { |
348 | index = (frame_index(zone, frame)) + (1 << frame->buddy_order); |
348 | index = (frame_index(zone, frame)) + (1 << frame->buddy_order); |
349 | } else { /* if (is_right) */ |
349 | } else { /* if (is_right) */ |
350 | index = (frame_index(zone, frame)) - (1 << frame->buddy_order); |
350 | index = (frame_index(zone, frame)) - (1 << frame->buddy_order); |
351 | } |
351 | } |
352 | 352 | ||
353 | if (frame_index_valid(zone, index)) { |
353 | if (frame_index_valid(zone, index)) { |
354 | if (zone->frames[index].buddy_order == frame->buddy_order && |
354 | if (zone->frames[index].buddy_order == frame->buddy_order && |
355 | zone->frames[index].refcount == 0) { |
355 | zone->frames[index].refcount == 0) { |
356 | return &zone->frames[index].buddy_link; |
356 | return &zone->frames[index].buddy_link; |
357 | } |
357 | } |
358 | } |
358 | } |
359 | 359 | ||
360 | return NULL; |
360 | return NULL; |
361 | } |
361 | } |
362 | 362 | ||
363 | /** Buddy system bisect implementation |
363 | /** Buddy system bisect implementation |
364 | * |
364 | * |
365 | * @param b Buddy system. |
365 | * @param b Buddy system. |
366 | * @param block Block to bisect |
366 | * @param block Block to bisect |
367 | * |
367 | * |
368 | * @return right block |
368 | * @return right block |
369 | */ |
369 | */ |
370 | static link_t * zone_buddy_bisect(buddy_system_t *b, link_t *block) { |
370 | static link_t * zone_buddy_bisect(buddy_system_t *b, link_t *block) { |
371 | frame_t *frame_l, *frame_r; |
371 | frame_t *frame_l, *frame_r; |
372 | 372 | ||
373 | frame_l = list_get_instance(block, frame_t, buddy_link); |
373 | frame_l = list_get_instance(block, frame_t, buddy_link); |
374 | frame_r = (frame_l + (1 << (frame_l->buddy_order - 1))); |
374 | frame_r = (frame_l + (1 << (frame_l->buddy_order - 1))); |
375 | 375 | ||
376 | return &frame_r->buddy_link; |
376 | return &frame_r->buddy_link; |
377 | } |
377 | } |
378 | 378 | ||
379 | /** Buddy system coalesce implementation |
379 | /** Buddy system coalesce implementation |
380 | * |
380 | * |
381 | * @param b Buddy system. |
381 | * @param b Buddy system. |
382 | * @param block_1 First block |
382 | * @param block_1 First block |
383 | * @param block_2 First block's buddy |
383 | * @param block_2 First block's buddy |
384 | * |
384 | * |
385 | * @return Coalesced block (actually block that represents lower address) |
385 | * @return Coalesced block (actually block that represents lower address) |
386 | */ |
386 | */ |
387 | static link_t *zone_buddy_coalesce(buddy_system_t *b, link_t *block_1, |
387 | static link_t *zone_buddy_coalesce(buddy_system_t *b, link_t *block_1, |
388 | link_t *block_2) |
388 | link_t *block_2) |
389 | { |
389 | { |
390 | frame_t *frame1, *frame2; |
390 | frame_t *frame1, *frame2; |
391 | 391 | ||
392 | frame1 = list_get_instance(block_1, frame_t, buddy_link); |
392 | frame1 = list_get_instance(block_1, frame_t, buddy_link); |
393 | frame2 = list_get_instance(block_2, frame_t, buddy_link); |
393 | frame2 = list_get_instance(block_2, frame_t, buddy_link); |
394 | 394 | ||
395 | return frame1 < frame2 ? block_1 : block_2; |
395 | return frame1 < frame2 ? block_1 : block_2; |
396 | } |
396 | } |
397 | 397 | ||
398 | /** Buddy system set_order implementation |
398 | /** Buddy system set_order implementation |
399 | * |
399 | * |
400 | * @param b Buddy system. |
400 | * @param b Buddy system. |
401 | * @param block Buddy system block |
401 | * @param block Buddy system block |
402 | * @param order Order to set |
402 | * @param order Order to set |
403 | */ |
403 | */ |
404 | static void zone_buddy_set_order(buddy_system_t *b, link_t *block, |
404 | static void zone_buddy_set_order(buddy_system_t *b, link_t *block, |
405 | uint8_t order) { |
405 | uint8_t order) { |
406 | frame_t *frame; |
406 | frame_t *frame; |
407 | frame = list_get_instance(block, frame_t, buddy_link); |
407 | frame = list_get_instance(block, frame_t, buddy_link); |
408 | frame->buddy_order = order; |
408 | frame->buddy_order = order; |
409 | } |
409 | } |
410 | 410 | ||
411 | /** Buddy system get_order implementation |
411 | /** Buddy system get_order implementation |
412 | * |
412 | * |
413 | * @param b Buddy system. |
413 | * @param b Buddy system. |
414 | * @param block Buddy system block |
414 | * @param block Buddy system block |
415 | * |
415 | * |
416 | * @return Order of block |
416 | * @return Order of block |
417 | */ |
417 | */ |
418 | static uint8_t zone_buddy_get_order(buddy_system_t *b, link_t *block) { |
418 | static uint8_t zone_buddy_get_order(buddy_system_t *b, link_t *block) { |
419 | frame_t *frame; |
419 | frame_t *frame; |
420 | frame = list_get_instance(block, frame_t, buddy_link); |
420 | frame = list_get_instance(block, frame_t, buddy_link); |
421 | return frame->buddy_order; |
421 | return frame->buddy_order; |
422 | } |
422 | } |
423 | 423 | ||
424 | /** Buddy system mark_busy implementation |
424 | /** Buddy system mark_busy implementation |
425 | * |
425 | * |
426 | * @param b Buddy system |
426 | * @param b Buddy system |
427 | * @param block Buddy system block |
427 | * @param block Buddy system block |
428 | * |
428 | * |
429 | */ |
429 | */ |
430 | static void zone_buddy_mark_busy(buddy_system_t *b, link_t * block) { |
430 | static void zone_buddy_mark_busy(buddy_system_t *b, link_t * block) { |
431 | frame_t * frame; |
431 | frame_t * frame; |
432 | 432 | ||
433 | frame = list_get_instance(block, frame_t, buddy_link); |
433 | frame = list_get_instance(block, frame_t, buddy_link); |
434 | frame->refcount = 1; |
434 | frame->refcount = 1; |
435 | } |
435 | } |
436 | 436 | ||
437 | /** Buddy system mark_available implementation |
437 | /** Buddy system mark_available implementation |
438 | * |
438 | * |
439 | * @param b Buddy system |
439 | * @param b Buddy system |
440 | * @param block Buddy system block |
440 | * @param block Buddy system block |
441 | * |
441 | * |
442 | */ |
442 | */ |
443 | static void zone_buddy_mark_available(buddy_system_t *b, link_t *block) { |
443 | static void zone_buddy_mark_available(buddy_system_t *b, link_t *block) { |
444 | frame_t *frame; |
444 | frame_t *frame; |
445 | frame = list_get_instance(block, frame_t, buddy_link); |
445 | frame = list_get_instance(block, frame_t, buddy_link); |
446 | frame->refcount = 0; |
446 | frame->refcount = 0; |
447 | } |
447 | } |
448 | 448 | ||
449 | static buddy_system_operations_t zone_buddy_system_operations = { |
449 | static buddy_system_operations_t zone_buddy_system_operations = { |
450 | .find_buddy = zone_buddy_find_buddy, |
450 | .find_buddy = zone_buddy_find_buddy, |
451 | .bisect = zone_buddy_bisect, |
451 | .bisect = zone_buddy_bisect, |
452 | .coalesce = zone_buddy_coalesce, |
452 | .coalesce = zone_buddy_coalesce, |
453 | .set_order = zone_buddy_set_order, |
453 | .set_order = zone_buddy_set_order, |
454 | .get_order = zone_buddy_get_order, |
454 | .get_order = zone_buddy_get_order, |
455 | .mark_busy = zone_buddy_mark_busy, |
455 | .mark_busy = zone_buddy_mark_busy, |
456 | .mark_available = zone_buddy_mark_available, |
456 | .mark_available = zone_buddy_mark_available, |
457 | .find_block = zone_buddy_find_block, |
457 | .find_block = zone_buddy_find_block, |
458 | .print_id = zone_buddy_print_id |
458 | .print_id = zone_buddy_print_id |
459 | }; |
459 | }; |
460 | 460 | ||
461 | /******************/ |
461 | /******************/ |
462 | /* Zone functions */ |
462 | /* Zone functions */ |
463 | /******************/ |
463 | /******************/ |
464 | 464 | ||
465 | /** Allocate frame in particular zone |
465 | /** Allocate frame in particular zone |
466 | * |
466 | * |
467 | * Assume zone is locked |
467 | * Assume zone is locked |
468 | * Panics if allocation is impossible. |
468 | * Panics if allocation is impossible. |
469 | * |
469 | * |
470 | * @param zone Zone to allocate from. |
470 | * @param zone Zone to allocate from. |
471 | * @param order Allocate exactly 2^order frames. |
471 | * @param order Allocate exactly 2^order frames. |
472 | * |
472 | * |
473 | * @return Frame index in zone |
473 | * @return Frame index in zone |
474 | * |
474 | * |
475 | */ |
475 | */ |
476 | static pfn_t zone_frame_alloc(zone_t *zone, uint8_t order) |
476 | static pfn_t zone_frame_alloc(zone_t *zone, uint8_t order) |
477 | { |
477 | { |
478 | pfn_t v; |
478 | pfn_t v; |
479 | link_t *tmp; |
479 | link_t *tmp; |
480 | frame_t *frame; |
480 | frame_t *frame; |
481 | 481 | ||
482 | /* Allocate frames from zone buddy system */ |
482 | /* Allocate frames from zone buddy system */ |
483 | tmp = buddy_system_alloc(zone->buddy_system, order); |
483 | tmp = buddy_system_alloc(zone->buddy_system, order); |
484 | 484 | ||
485 | ASSERT(tmp); |
485 | ASSERT(tmp); |
486 | 486 | ||
487 | /* Update zone information. */ |
487 | /* Update zone information. */ |
488 | zone->free_count -= (1 << order); |
488 | zone->free_count -= (1 << order); |
489 | zone->busy_count += (1 << order); |
489 | zone->busy_count += (1 << order); |
490 | 490 | ||
491 | /* Frame will be actually a first frame of the block. */ |
491 | /* Frame will be actually a first frame of the block. */ |
492 | frame = list_get_instance(tmp, frame_t, buddy_link); |
492 | frame = list_get_instance(tmp, frame_t, buddy_link); |
493 | 493 | ||
494 | /* get frame address */ |
494 | /* get frame address */ |
495 | v = make_frame_index(zone, frame); |
495 | v = make_frame_index(zone, frame); |
496 | return v; |
496 | return v; |
497 | } |
497 | } |
498 | 498 | ||
499 | /** Free frame from zone |
499 | /** Free frame from zone |
500 | * |
500 | * |
501 | * Assume zone is locked |
501 | * Assume zone is locked |
502 | * |
502 | * |
503 | * @param zone Pointer to zone from which the frame is to be freed |
503 | * @param zone Pointer to zone from which the frame is to be freed |
504 | * @param frame_idx Frame index relative to zone |
504 | * @param frame_idx Frame index relative to zone |
505 | */ |
505 | */ |
506 | static void zone_frame_free(zone_t *zone, index_t frame_idx) |
506 | static void zone_frame_free(zone_t *zone, index_t frame_idx) |
507 | { |
507 | { |
508 | frame_t *frame; |
508 | frame_t *frame; |
509 | uint8_t order; |
509 | uint8_t order; |
510 | 510 | ||
511 | frame = &zone->frames[frame_idx]; |
511 | frame = &zone->frames[frame_idx]; |
512 | 512 | ||
513 | /* remember frame order */ |
513 | /* remember frame order */ |
514 | order = frame->buddy_order; |
514 | order = frame->buddy_order; |
515 | 515 | ||
516 | ASSERT(frame->refcount); |
516 | ASSERT(frame->refcount); |
517 | 517 | ||
518 | if (!--frame->refcount) { |
518 | if (!--frame->refcount) { |
519 | buddy_system_free(zone->buddy_system, &frame->buddy_link); |
519 | buddy_system_free(zone->buddy_system, &frame->buddy_link); |
520 | 520 | ||
521 | /* Update zone information. */ |
521 | /* Update zone information. */ |
522 | zone->free_count += (1 << order); |
522 | zone->free_count += (1 << order); |
523 | zone->busy_count -= (1 << order); |
523 | zone->busy_count -= (1 << order); |
524 | } |
524 | } |
525 | } |
525 | } |
526 | 526 | ||
527 | /** Return frame from zone */ |
527 | /** Return frame from zone */ |
528 | static frame_t * zone_get_frame(zone_t *zone, index_t frame_idx) |
528 | static frame_t * zone_get_frame(zone_t *zone, index_t frame_idx) |
529 | { |
529 | { |
530 | ASSERT(frame_idx < zone->count); |
530 | ASSERT(frame_idx < zone->count); |
531 | return &zone->frames[frame_idx]; |
531 | return &zone->frames[frame_idx]; |
532 | } |
532 | } |
533 | 533 | ||
534 | /** Mark frame in zone unavailable to allocation */ |
534 | /** Mark frame in zone unavailable to allocation */ |
535 | static void zone_mark_unavailable(zone_t *zone, index_t frame_idx) |
535 | static void zone_mark_unavailable(zone_t *zone, index_t frame_idx) |
536 | { |
536 | { |
537 | frame_t *frame; |
537 | frame_t *frame; |
538 | link_t *link; |
538 | link_t *link; |
539 | 539 | ||
540 | frame = zone_get_frame(zone, frame_idx); |
540 | frame = zone_get_frame(zone, frame_idx); |
541 | if (frame->refcount) |
541 | if (frame->refcount) |
542 | return; |
542 | return; |
543 | link = buddy_system_alloc_block(zone->buddy_system, |
543 | link = buddy_system_alloc_block(zone->buddy_system, |
544 | &frame->buddy_link); |
544 | &frame->buddy_link); |
545 | ASSERT(link); |
545 | ASSERT(link); |
546 | zone->free_count--; |
546 | zone->free_count--; |
547 | } |
547 | } |
548 | 548 | ||
549 | /** |
549 | /** |
550 | * Join 2 zones |
550 | * Join 2 zones |
551 | * |
551 | * |
552 | * Expect zone_t *z to point to space at least zone_conf_size large |
552 | * Expect zone_t *z to point to space at least zone_conf_size large |
553 | * |
553 | * |
554 | * Assume z1 & z2 are locked |
554 | * Assume z1 & z2 are locked |
555 | * |
555 | * |
556 | * @param z Target zone structure pointer |
556 | * @param z Target zone structure pointer |
557 | * @param z1 Zone to merge |
557 | * @param z1 Zone to merge |
558 | * @param z2 Zone to merge |
558 | * @param z2 Zone to merge |
559 | */ |
559 | */ |
560 | static void _zone_merge(zone_t *z, zone_t *z1, zone_t *z2) |
560 | static void _zone_merge(zone_t *z, zone_t *z1, zone_t *z2) |
561 | { |
561 | { |
562 | uint8_t max_order; |
562 | uint8_t max_order; |
563 | unsigned int i; |
563 | unsigned int i; |
564 | int z2idx; |
564 | int z2idx; |
565 | pfn_t frame_idx; |
565 | pfn_t frame_idx; |
566 | frame_t *frame; |
566 | frame_t *frame; |
567 | 567 | ||
568 | ASSERT(!overlaps(z1->base, z1->count, z2->base, z2->count)); |
568 | ASSERT(!overlaps(z1->base, z1->count, z2->base, z2->count)); |
569 | ASSERT(z1->base < z2->base); |
569 | ASSERT(z1->base < z2->base); |
570 | 570 | ||
571 | spinlock_initialize(&z->lock, "zone_lock"); |
571 | spinlock_initialize(&z->lock, "zone_lock"); |
572 | z->base = z1->base; |
572 | z->base = z1->base; |
573 | z->count = z2->base + z2->count - z1->base; |
573 | z->count = z2->base + z2->count - z1->base; |
574 | z->flags = z1->flags & z2->flags; |
574 | z->flags = z1->flags & z2->flags; |
575 | 575 | ||
576 | z->free_count = z1->free_count + z2->free_count; |
576 | z->free_count = z1->free_count + z2->free_count; |
577 | z->busy_count = z1->busy_count + z2->busy_count; |
577 | z->busy_count = z1->busy_count + z2->busy_count; |
578 | 578 | ||
579 | max_order = fnzb(z->count); |
579 | max_order = fnzb(z->count); |
580 | 580 | ||
581 | z->buddy_system = (buddy_system_t *) &z[1]; |
581 | z->buddy_system = (buddy_system_t *) &z[1]; |
582 | buddy_system_create(z->buddy_system, max_order, |
582 | buddy_system_create(z->buddy_system, max_order, |
583 | &zone_buddy_system_operations, (void *) z); |
583 | &zone_buddy_system_operations, (void *) z); |
584 | 584 | ||
585 | z->frames = (frame_t *)((uint8_t *) z->buddy_system + |
585 | z->frames = (frame_t *)((uint8_t *) z->buddy_system + |
586 | buddy_conf_size(max_order)); |
586 | buddy_conf_size(max_order)); |
587 | for (i = 0; i < z->count; i++) { |
587 | for (i = 0; i < z->count; i++) { |
588 | /* This marks all frames busy */ |
588 | /* This marks all frames busy */ |
589 | frame_initialize(&z->frames[i]); |
589 | frame_initialize(&z->frames[i]); |
590 | } |
590 | } |
591 | /* Copy frames from both zones to preserve full frame orders, |
591 | /* Copy frames from both zones to preserve full frame orders, |
592 | * parents etc. Set all free frames with refcount=0 to 1, because |
592 | * parents etc. Set all free frames with refcount=0 to 1, because |
593 | * we add all free frames to buddy allocator later again, clear |
593 | * we add all free frames to buddy allocator later again, clear |
594 | * order to 0. Don't set busy frames with refcount=0, as they |
594 | * order to 0. Don't set busy frames with refcount=0, as they |
595 | * will not be reallocated during merge and it would make later |
595 | * will not be reallocated during merge and it would make later |
596 | * problems with allocation/free. |
596 | * problems with allocation/free. |
597 | */ |
597 | */ |
598 | for (i = 0; i < z1->count; i++) |
598 | for (i = 0; i < z1->count; i++) |
599 | z->frames[i] = z1->frames[i]; |
599 | z->frames[i] = z1->frames[i]; |
600 | for (i = 0; i < z2->count; i++) { |
600 | for (i = 0; i < z2->count; i++) { |
601 | z2idx = i + (z2->base - z1->base); |
601 | z2idx = i + (z2->base - z1->base); |
602 | z->frames[z2idx] = z2->frames[i]; |
602 | z->frames[z2idx] = z2->frames[i]; |
603 | } |
603 | } |
604 | i = 0; |
604 | i = 0; |
605 | while (i < z->count) { |
605 | while (i < z->count) { |
606 | if (z->frames[i].refcount) { |
606 | if (z->frames[i].refcount) { |
607 | /* skip busy frames */ |
607 | /* skip busy frames */ |
608 | i += 1 << z->frames[i].buddy_order; |
608 | i += 1 << z->frames[i].buddy_order; |
609 | } else { /* Free frames, set refcount=1 */ |
609 | } else { /* Free frames, set refcount=1 */ |
610 | /* All free frames have refcount=0, we need not |
610 | /* All free frames have refcount=0, we need not |
611 | * to check the order */ |
611 | * to check the order */ |
612 | z->frames[i].refcount = 1; |
612 | z->frames[i].refcount = 1; |
613 | z->frames[i].buddy_order = 0; |
613 | z->frames[i].buddy_order = 0; |
614 | i++; |
614 | i++; |
615 | } |
615 | } |
616 | } |
616 | } |
617 | /* Add free blocks from the 2 original zones */ |
617 | /* Add free blocks from the 2 original zones */ |
618 | while (zone_can_alloc(z1, 0)) { |
618 | while (zone_can_alloc(z1, 0)) { |
619 | frame_idx = zone_frame_alloc(z1, 0); |
619 | frame_idx = zone_frame_alloc(z1, 0); |
620 | frame = &z->frames[frame_idx]; |
620 | frame = &z->frames[frame_idx]; |
621 | frame->refcount = 0; |
621 | frame->refcount = 0; |
622 | buddy_system_free(z->buddy_system, &frame->buddy_link); |
622 | buddy_system_free(z->buddy_system, &frame->buddy_link); |
623 | } |
623 | } |
624 | while (zone_can_alloc(z2, 0)) { |
624 | while (zone_can_alloc(z2, 0)) { |
625 | frame_idx = zone_frame_alloc(z2, 0); |
625 | frame_idx = zone_frame_alloc(z2, 0); |
626 | frame = &z->frames[frame_idx + (z2->base - z1->base)]; |
626 | frame = &z->frames[frame_idx + (z2->base - z1->base)]; |
627 | frame->refcount = 0; |
627 | frame->refcount = 0; |
628 | buddy_system_free(z->buddy_system, &frame->buddy_link); |
628 | buddy_system_free(z->buddy_system, &frame->buddy_link); |
629 | } |
629 | } |
630 | } |
630 | } |
631 | 631 | ||
632 | /** Return old configuration frames into the zone |
632 | /** Return old configuration frames into the zone |
633 | * |
633 | * |
634 | * We have several cases |
634 | * We have several cases |
635 | * - the conf. data is outside of zone -> exit, shall we call frame_free?? |
635 | * - the conf. data is outside of zone -> exit, shall we call frame_free?? |
636 | * - the conf. data was created by zone_create or |
636 | * - the conf. data was created by zone_create or |
637 | * updated with reduce_region -> free every frame |
637 | * updated with reduce_region -> free every frame |
638 | * |
638 | * |
639 | * @param newzone The actual zone where freeing should occur |
639 | * @param newzone The actual zone where freeing should occur |
640 | * @param oldzone Pointer to old zone configuration data that should |
640 | * @param oldzone Pointer to old zone configuration data that should |
641 | * be freed from new zone |
641 | * be freed from new zone |
642 | */ |
642 | */ |
643 | static void return_config_frames(zone_t *newzone, zone_t *oldzone) |
643 | static void return_config_frames(zone_t *newzone, zone_t *oldzone) |
644 | { |
644 | { |
645 | pfn_t pfn; |
645 | pfn_t pfn; |
646 | frame_t *frame; |
646 | frame_t *frame; |
647 | count_t cframes; |
647 | count_t cframes; |
648 | unsigned int i; |
648 | unsigned int i; |
649 | 649 | ||
650 | pfn = ADDR2PFN((uintptr_t)KA2PA(oldzone)); |
650 | pfn = ADDR2PFN((uintptr_t)KA2PA(oldzone)); |
651 | cframes = SIZE2FRAMES(zone_conf_size(oldzone->count)); |
651 | cframes = SIZE2FRAMES(zone_conf_size(oldzone->count)); |
652 | 652 | ||
653 | if (pfn < newzone->base || pfn >= newzone->base + newzone->count) |
653 | if (pfn < newzone->base || pfn >= newzone->base + newzone->count) |
654 | return; |
654 | return; |
655 | 655 | ||
656 | frame = &newzone->frames[pfn - newzone->base]; |
656 | frame = &newzone->frames[pfn - newzone->base]; |
657 | ASSERT(!frame->buddy_order); |
657 | ASSERT(!frame->buddy_order); |
658 | 658 | ||
659 | for (i = 0; i < cframes; i++) { |
659 | for (i = 0; i < cframes; i++) { |
660 | newzone->busy_count++; |
660 | newzone->busy_count++; |
661 | zone_frame_free(newzone, pfn+i-newzone->base); |
661 | zone_frame_free(newzone, pfn+i-newzone->base); |
662 | } |
662 | } |
663 | } |
663 | } |
664 | 664 | ||
665 | /** Reduce allocated block to count of order 0 frames |
665 | /** Reduce allocated block to count of order 0 frames |
666 | * |
666 | * |
667 | * The allocated block need 2^order frames of space. Reduce all frames |
667 | * The allocated block need 2^order frames of space. Reduce all frames |
668 | * in block to order 0 and free the unneeded frames. This means, that |
668 | * in block to order 0 and free the unneeded frames. This means, that |
669 | * when freeing the previously allocated block starting with frame_idx, |
669 | * when freeing the previously allocated block starting with frame_idx, |
670 | * you have to free every frame. |
670 | * you have to free every frame. |
671 | * |
671 | * |
672 | * @param zone |
672 | * @param zone |
673 | * @param frame_idx Index to block |
673 | * @param frame_idx Index to block |
674 | * @param count Allocated space in block |
674 | * @param count Allocated space in block |
675 | */ |
675 | */ |
676 | static void zone_reduce_region(zone_t *zone, pfn_t frame_idx, count_t count) |
676 | static void zone_reduce_region(zone_t *zone, pfn_t frame_idx, count_t count) |
677 | { |
677 | { |
678 | count_t i; |
678 | count_t i; |
679 | uint8_t order; |
679 | uint8_t order; |
680 | frame_t *frame; |
680 | frame_t *frame; |
681 | 681 | ||
682 | ASSERT(frame_idx + count < zone->count); |
682 | ASSERT(frame_idx + count < zone->count); |
683 | 683 | ||
684 | order = zone->frames[frame_idx].buddy_order; |
684 | order = zone->frames[frame_idx].buddy_order; |
685 | ASSERT((count_t) (1 << order) >= count); |
685 | ASSERT((count_t) (1 << order) >= count); |
686 | 686 | ||
687 | /* Reduce all blocks to order 0 */ |
687 | /* Reduce all blocks to order 0 */ |
688 | for (i = 0; i < (count_t) (1 << order); i++) { |
688 | for (i = 0; i < (count_t) (1 << order); i++) { |
689 | frame = &zone->frames[i + frame_idx]; |
689 | frame = &zone->frames[i + frame_idx]; |
690 | frame->buddy_order = 0; |
690 | frame->buddy_order = 0; |
691 | if (!frame->refcount) |
691 | if (!frame->refcount) |
692 | frame->refcount = 1; |
692 | frame->refcount = 1; |
693 | ASSERT(frame->refcount == 1); |
693 | ASSERT(frame->refcount == 1); |
694 | } |
694 | } |
695 | /* Free unneeded frames */ |
695 | /* Free unneeded frames */ |
696 | for (i = count; i < (count_t) (1 << order); i++) { |
696 | for (i = count; i < (count_t) (1 << order); i++) { |
697 | zone_frame_free(zone, i + frame_idx); |
697 | zone_frame_free(zone, i + frame_idx); |
698 | } |
698 | } |
699 | } |
699 | } |
700 | 700 | ||
701 | /** Merge zones z1 and z2 |
701 | /** Merge zones z1 and z2 |
702 | * |
702 | * |
703 | * - the zones must be 2 zones with no zone existing in between, |
703 | * - the zones must be 2 zones with no zone existing in between, |
704 | * which means that z2 = z1+1 |
704 | * which means that z2 = z1+1 |
705 | * |
705 | * |
706 | * - When you create a new zone, the frame allocator configuration does |
706 | * - When you create a new zone, the frame allocator configuration does |
707 | * not to be 2^order size. Once the allocator is running it is no longer |
707 | * not to be 2^order size. Once the allocator is running it is no longer |
708 | * possible, merged configuration data occupies more space :-/ |
708 | * possible, merged configuration data occupies more space :-/ |
709 | */ |
709 | */ |
710 | void zone_merge(unsigned int z1, unsigned int z2) |
710 | void zone_merge(unsigned int z1, unsigned int z2) |
711 | { |
711 | { |
712 | ipl_t ipl; |
712 | ipl_t ipl; |
713 | zone_t *zone1, *zone2, *newzone; |
713 | zone_t *zone1, *zone2, *newzone; |
714 | unsigned int cframes; |
714 | unsigned int cframes; |
715 | uint8_t order; |
715 | uint8_t order; |
716 | unsigned int i; |
716 | unsigned int i; |
717 | pfn_t pfn; |
717 | pfn_t pfn; |
718 | 718 | ||
719 | ipl = interrupts_disable(); |
719 | ipl = interrupts_disable(); |
720 | spinlock_lock(&zones.lock); |
720 | spinlock_lock(&zones.lock); |
721 | 721 | ||
722 | if (z1 < 0 || z1 >= zones.count || z2 < 0 || z2 >= zones.count) |
722 | if ((z1 >= zones.count) || (z2 >= zones.count)) |
723 | goto errout; |
723 | goto errout; |
724 | /* We can join only 2 zones with none existing inbetween */ |
724 | /* We can join only 2 zones with none existing inbetween */ |
725 | if (z2-z1 != 1) |
725 | if (z2-z1 != 1) |
726 | goto errout; |
726 | goto errout; |
727 | 727 | ||
728 | zone1 = zones.info[z1]; |
728 | zone1 = zones.info[z1]; |
729 | zone2 = zones.info[z2]; |
729 | zone2 = zones.info[z2]; |
730 | spinlock_lock(&zone1->lock); |
730 | spinlock_lock(&zone1->lock); |
731 | spinlock_lock(&zone2->lock); |
731 | spinlock_lock(&zone2->lock); |
732 | 732 | ||
733 | cframes = SIZE2FRAMES(zone_conf_size(zone2->base + zone2->count - |
733 | cframes = SIZE2FRAMES(zone_conf_size(zone2->base + zone2->count - |
734 | zone1->base)); |
734 | zone1->base)); |
735 | if (cframes == 1) |
735 | if (cframes == 1) |
736 | order = 0; |
736 | order = 0; |
737 | else |
737 | else |
738 | order = fnzb(cframes - 1) + 1; |
738 | order = fnzb(cframes - 1) + 1; |
739 | 739 | ||
740 | /* Allocate zonedata inside one of the zones */ |
740 | /* Allocate zonedata inside one of the zones */ |
741 | if (zone_can_alloc(zone1, order)) |
741 | if (zone_can_alloc(zone1, order)) |
742 | pfn = zone1->base + zone_frame_alloc(zone1, order); |
742 | pfn = zone1->base + zone_frame_alloc(zone1, order); |
743 | else if (zone_can_alloc(zone2, order)) |
743 | else if (zone_can_alloc(zone2, order)) |
744 | pfn = zone2->base + zone_frame_alloc(zone2, order); |
744 | pfn = zone2->base + zone_frame_alloc(zone2, order); |
745 | else |
745 | else |
746 | goto errout2; |
746 | goto errout2; |
747 | 747 | ||
748 | newzone = (zone_t *) PA2KA(PFN2ADDR(pfn)); |
748 | newzone = (zone_t *) PA2KA(PFN2ADDR(pfn)); |
749 | 749 | ||
750 | _zone_merge(newzone, zone1, zone2); |
750 | _zone_merge(newzone, zone1, zone2); |
751 | 751 | ||
752 | /* Free unneeded config frames */ |
752 | /* Free unneeded config frames */ |
753 | zone_reduce_region(newzone, pfn - newzone->base, cframes); |
753 | zone_reduce_region(newzone, pfn - newzone->base, cframes); |
754 | /* Subtract zone information from busy frames */ |
754 | /* Subtract zone information from busy frames */ |
755 | newzone->busy_count -= cframes; |
755 | newzone->busy_count -= cframes; |
756 | 756 | ||
757 | /* Replace existing zones in zoneinfo list */ |
757 | /* Replace existing zones in zoneinfo list */ |
758 | zones.info[z1] = newzone; |
758 | zones.info[z1] = newzone; |
759 | for (i = z2 + 1; i < zones.count; i++) |
759 | for (i = z2 + 1; i < zones.count; i++) |
760 | zones.info[i - 1] = zones.info[i]; |
760 | zones.info[i - 1] = zones.info[i]; |
761 | zones.count--; |
761 | zones.count--; |
762 | 762 | ||
763 | /* Free old zone information */ |
763 | /* Free old zone information */ |
764 | return_config_frames(newzone, zone1); |
764 | return_config_frames(newzone, zone1); |
765 | return_config_frames(newzone, zone2); |
765 | return_config_frames(newzone, zone2); |
766 | errout2: |
766 | errout2: |
767 | /* Nobody is allowed to enter to zone, so we are safe |
767 | /* Nobody is allowed to enter to zone, so we are safe |
768 | * to touch the spinlocks last time */ |
768 | * to touch the spinlocks last time */ |
769 | spinlock_unlock(&zone1->lock); |
769 | spinlock_unlock(&zone1->lock); |
770 | spinlock_unlock(&zone2->lock); |
770 | spinlock_unlock(&zone2->lock); |
771 | errout: |
771 | errout: |
772 | spinlock_unlock(&zones.lock); |
772 | spinlock_unlock(&zones.lock); |
773 | interrupts_restore(ipl); |
773 | interrupts_restore(ipl); |
774 | } |
774 | } |
775 | 775 | ||
776 | /** |
776 | /** |
777 | * Merge all zones into one big zone |
777 | * Merge all zones into one big zone |
778 | * |
778 | * |
779 | * It is reasonable to do this on systems whose bios reports parts in chunks, |
779 | * It is reasonable to do this on systems whose bios reports parts in chunks, |
780 | * so that we could have 1 zone (it's faster). |
780 | * so that we could have 1 zone (it's faster). |
781 | */ |
781 | */ |
782 | void zone_merge_all(void) |
782 | void zone_merge_all(void) |
783 | { |
783 | { |
784 | int count = zones.count; |
784 | int count = zones.count; |
785 | 785 | ||
786 | while (zones.count > 1 && --count) { |
786 | while (zones.count > 1 && --count) { |
787 | zone_merge(0,1); |
787 | zone_merge(0,1); |
788 | break; |
788 | break; |
789 | } |
789 | } |
790 | } |
790 | } |
791 | 791 | ||
792 | /** Create frame zone |
792 | /** Create frame zone |
793 | * |
793 | * |
794 | * Create new frame zone. |
794 | * Create new frame zone. |
795 | * |
795 | * |
796 | * @param start Physical address of the first frame within the zone. |
796 | * @param start Physical address of the first frame within the zone. |
797 | * @param count Count of frames in zone |
797 | * @param count Count of frames in zone |
798 | * @param z Address of configuration information of zone |
798 | * @param z Address of configuration information of zone |
799 | * @param flags Zone flags. |
799 | * @param flags Zone flags. |
800 | * |
800 | * |
801 | * @return Initialized zone. |
801 | * @return Initialized zone. |
802 | */ |
802 | */ |
803 | static void zone_construct(pfn_t start, count_t count, zone_t *z, int flags) |
803 | static void zone_construct(pfn_t start, count_t count, zone_t *z, int flags) |
804 | { |
804 | { |
805 | unsigned int i; |
805 | unsigned int i; |
806 | uint8_t max_order; |
806 | uint8_t max_order; |
807 | 807 | ||
808 | spinlock_initialize(&z->lock, "zone_lock"); |
808 | spinlock_initialize(&z->lock, "zone_lock"); |
809 | z->base = start; |
809 | z->base = start; |
810 | z->count = count; |
810 | z->count = count; |
811 | z->flags = flags; |
811 | z->flags = flags; |
812 | z->free_count = count; |
812 | z->free_count = count; |
813 | z->busy_count = 0; |
813 | z->busy_count = 0; |
814 | 814 | ||
815 | /* |
815 | /* |
816 | * Compute order for buddy system, initialize |
816 | * Compute order for buddy system, initialize |
817 | */ |
817 | */ |
818 | max_order = fnzb(count); |
818 | max_order = fnzb(count); |
819 | z->buddy_system = (buddy_system_t *)&z[1]; |
819 | z->buddy_system = (buddy_system_t *)&z[1]; |
820 | 820 | ||
821 | buddy_system_create(z->buddy_system, max_order, |
821 | buddy_system_create(z->buddy_system, max_order, |
822 | &zone_buddy_system_operations, |
822 | &zone_buddy_system_operations, |
823 | (void *) z); |
823 | (void *) z); |
824 | 824 | ||
825 | /* Allocate frames _after_ the conframe */ |
825 | /* Allocate frames _after_ the conframe */ |
826 | /* Check sizes */ |
826 | /* Check sizes */ |
827 | z->frames = (frame_t *)((uint8_t *) z->buddy_system + |
827 | z->frames = (frame_t *)((uint8_t *) z->buddy_system + |
828 | buddy_conf_size(max_order)); |
828 | buddy_conf_size(max_order)); |
829 | for (i = 0; i < count; i++) { |
829 | for (i = 0; i < count; i++) { |
830 | frame_initialize(&z->frames[i]); |
830 | frame_initialize(&z->frames[i]); |
831 | } |
831 | } |
832 | 832 | ||
833 | /* Stuffing frames */ |
833 | /* Stuffing frames */ |
834 | for (i = 0; i < count; i++) { |
834 | for (i = 0; i < count; i++) { |
835 | z->frames[i].refcount = 0; |
835 | z->frames[i].refcount = 0; |
836 | buddy_system_free(z->buddy_system, &z->frames[i].buddy_link); |
836 | buddy_system_free(z->buddy_system, &z->frames[i].buddy_link); |
837 | } |
837 | } |
838 | } |
838 | } |
839 | 839 | ||
840 | /** Compute configuration data size for zone |
840 | /** Compute configuration data size for zone |
841 | * |
841 | * |
842 | * @param count Size of zone in frames |
842 | * @param count Size of zone in frames |
843 | * @return Size of zone configuration info (in bytes) |
843 | * @return Size of zone configuration info (in bytes) |
844 | */ |
844 | */ |
845 | uintptr_t zone_conf_size(count_t count) |
845 | uintptr_t zone_conf_size(count_t count) |
846 | { |
846 | { |
847 | int size = sizeof(zone_t) + count*sizeof(frame_t); |
847 | int size = sizeof(zone_t) + count*sizeof(frame_t); |
848 | int max_order; |
848 | int max_order; |
849 | 849 | ||
850 | max_order = fnzb(count); |
850 | max_order = fnzb(count); |
851 | size += buddy_conf_size(max_order); |
851 | size += buddy_conf_size(max_order); |
852 | return size; |
852 | return size; |
853 | } |
853 | } |
854 | 854 | ||
855 | /** Create and add zone to system |
855 | /** Create and add zone to system |
856 | * |
856 | * |
857 | * @param start First frame number (absolute) |
857 | * @param start First frame number (absolute) |
858 | * @param count Size of zone in frames |
858 | * @param count Size of zone in frames |
859 | * @param confframe Where configuration frames are supposed to be. |
859 | * @param confframe Where configuration frames are supposed to be. |
860 | * Automatically checks, that we will not disturb the |
860 | * Automatically checks, that we will not disturb the |
861 | * kernel and possibly init. |
861 | * kernel and possibly init. |
862 | * If confframe is given _outside_ this zone, it is expected, |
862 | * If confframe is given _outside_ this zone, it is expected, |
863 | * that the area is already marked BUSY and big enough |
863 | * that the area is already marked BUSY and big enough |
864 | * to contain zone_conf_size() amount of data. |
864 | * to contain zone_conf_size() amount of data. |
865 | * If the confframe is inside the area, the zone free frame |
865 | * If the confframe is inside the area, the zone free frame |
866 | * information is modified not to include it. |
866 | * information is modified not to include it. |
867 | * |
867 | * |
868 | * @return Zone number or -1 on error |
868 | * @return Zone number or -1 on error |
869 | */ |
869 | */ |
870 | int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags) |
870 | int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags) |
871 | { |
871 | { |
872 | zone_t *z; |
872 | zone_t *z; |
873 | uintptr_t addr; |
873 | uintptr_t addr; |
874 | count_t confcount; |
874 | count_t confcount; |
875 | unsigned int i; |
875 | unsigned int i; |
876 | int znum; |
876 | int znum; |
877 | 877 | ||
878 | /* Theoretically we could have here 0, practically make sure |
878 | /* Theoretically we could have here 0, practically make sure |
879 | * nobody tries to do that. If some platform requires, remove |
879 | * nobody tries to do that. If some platform requires, remove |
880 | * the assert |
880 | * the assert |
881 | */ |
881 | */ |
882 | ASSERT(confframe); |
882 | ASSERT(confframe); |
883 | /* If conframe is supposed to be inside our zone, then make sure |
883 | /* If conframe is supposed to be inside our zone, then make sure |
884 | * it does not span kernel & init |
884 | * it does not span kernel & init |
885 | */ |
885 | */ |
886 | confcount = SIZE2FRAMES(zone_conf_size(count)); |
886 | confcount = SIZE2FRAMES(zone_conf_size(count)); |
887 | if (confframe >= start && confframe < start+count) { |
887 | if (confframe >= start && confframe < start+count) { |
888 | for (;confframe < start + count; confframe++) { |
888 | for (;confframe < start + count; confframe++) { |
889 | addr = PFN2ADDR(confframe); |
889 | addr = PFN2ADDR(confframe); |
890 | if (overlaps(addr, PFN2ADDR(confcount), |
890 | if (overlaps(addr, PFN2ADDR(confcount), |
891 | KA2PA(config.base), config.kernel_size)) |
891 | KA2PA(config.base), config.kernel_size)) |
892 | continue; |
892 | continue; |
893 | 893 | ||
894 | if (overlaps(addr, PFN2ADDR(confcount), |
894 | if (overlaps(addr, PFN2ADDR(confcount), |
895 | KA2PA(config.stack_base), config.stack_size)) |
895 | KA2PA(config.stack_base), config.stack_size)) |
896 | continue; |
896 | continue; |
897 | 897 | ||
898 | bool overlap = false; |
898 | bool overlap = false; |
899 | count_t i; |
899 | count_t i; |
900 | for (i = 0; i < init.cnt; i++) |
900 | for (i = 0; i < init.cnt; i++) |
901 | if (overlaps(addr, PFN2ADDR(confcount), |
901 | if (overlaps(addr, PFN2ADDR(confcount), |
902 | KA2PA(init.tasks[i].addr), |
902 | KA2PA(init.tasks[i].addr), |
903 | init.tasks[i].size)) { |
903 | init.tasks[i].size)) { |
904 | overlap = true; |
904 | overlap = true; |
905 | break; |
905 | break; |
906 | } |
906 | } |
907 | if (overlap) |
907 | if (overlap) |
908 | continue; |
908 | continue; |
909 | 909 | ||
910 | break; |
910 | break; |
911 | } |
911 | } |
912 | if (confframe >= start + count) |
912 | if (confframe >= start + count) |
913 | panic("Cannot find configuration data for zone."); |
913 | panic("Cannot find configuration data for zone."); |
914 | } |
914 | } |
915 | 915 | ||
916 | z = (zone_t *) PA2KA(PFN2ADDR(confframe)); |
916 | z = (zone_t *) PA2KA(PFN2ADDR(confframe)); |
917 | zone_construct(start, count, z, flags); |
917 | zone_construct(start, count, z, flags); |
918 | znum = zones_add_zone(z); |
918 | znum = zones_add_zone(z); |
919 | if (znum == -1) |
919 | if (znum == -1) |
920 | return -1; |
920 | return -1; |
921 | 921 | ||
922 | /* If confdata in zone, mark as unavailable */ |
922 | /* If confdata in zone, mark as unavailable */ |
923 | if (confframe >= start && confframe < start + count) |
923 | if (confframe >= start && confframe < start + count) |
924 | for (i = confframe; i < confframe + confcount; i++) { |
924 | for (i = confframe; i < confframe + confcount; i++) { |
925 | zone_mark_unavailable(z, i - z->base); |
925 | zone_mark_unavailable(z, i - z->base); |
926 | } |
926 | } |
927 | return znum; |
927 | return znum; |
928 | } |
928 | } |
929 | 929 | ||
930 | /***************************************/ |
930 | /***************************************/ |
931 | /* Frame functions */ |
931 | /* Frame functions */ |
932 | 932 | ||
933 | /** Set parent of frame */ |
933 | /** Set parent of frame */ |
934 | void frame_set_parent(pfn_t pfn, void *data, unsigned int hint) |
934 | void frame_set_parent(pfn_t pfn, void *data, unsigned int hint) |
935 | { |
935 | { |
936 | zone_t *zone = find_zone_and_lock(pfn, &hint); |
936 | zone_t *zone = find_zone_and_lock(pfn, &hint); |
937 | 937 | ||
938 | ASSERT(zone); |
938 | ASSERT(zone); |
939 | 939 | ||
940 | zone_get_frame(zone, pfn-zone->base)->parent = data; |
940 | zone_get_frame(zone, pfn-zone->base)->parent = data; |
941 | spinlock_unlock(&zone->lock); |
941 | spinlock_unlock(&zone->lock); |
942 | } |
942 | } |
943 | 943 | ||
944 | void *frame_get_parent(pfn_t pfn, unsigned int hint) |
944 | void *frame_get_parent(pfn_t pfn, unsigned int hint) |
945 | { |
945 | { |
946 | zone_t *zone = find_zone_and_lock(pfn, &hint); |
946 | zone_t *zone = find_zone_and_lock(pfn, &hint); |
947 | void *res; |
947 | void *res; |
948 | 948 | ||
949 | ASSERT(zone); |
949 | ASSERT(zone); |
950 | res = zone_get_frame(zone, pfn - zone->base)->parent; |
950 | res = zone_get_frame(zone, pfn - zone->base)->parent; |
951 | 951 | ||
952 | spinlock_unlock(&zone->lock); |
952 | spinlock_unlock(&zone->lock); |
953 | return res; |
953 | return res; |
954 | } |
954 | } |
955 | 955 | ||
956 | /** Allocate power-of-two frames of physical memory. |
956 | /** Allocate power-of-two frames of physical memory. |
957 | * |
957 | * |
958 | * @param order Allocate exactly 2^order frames. |
958 | * @param order Allocate exactly 2^order frames. |
959 | * @param flags Flags for host zone selection and address processing. |
959 | * @param flags Flags for host zone selection and address processing. |
960 | * @param pzone Preferred zone |
960 | * @param pzone Preferred zone |
961 | * |
961 | * |
962 | * @return Physical address of the allocated frame. |
962 | * @return Physical address of the allocated frame. |
963 | * |
963 | * |
964 | */ |
964 | */ |
965 | void * frame_alloc_generic(uint8_t order, int flags, unsigned int *pzone) |
965 | void * frame_alloc_generic(uint8_t order, int flags, unsigned int *pzone) |
966 | { |
966 | { |
967 | ipl_t ipl; |
967 | ipl_t ipl; |
968 | int freed; |
968 | int freed; |
969 | pfn_t v; |
969 | pfn_t v; |
970 | zone_t *zone; |
970 | zone_t *zone; |
971 | 971 | ||
972 | loop: |
972 | loop: |
973 | ipl = interrupts_disable(); |
973 | ipl = interrupts_disable(); |
974 | 974 | ||
975 | /* |
975 | /* |
976 | * First, find suitable frame zone. |
976 | * First, find suitable frame zone. |
977 | */ |
977 | */ |
978 | zone = find_free_zone_and_lock(order, pzone); |
978 | zone = find_free_zone_and_lock(order, pzone); |
979 | 979 | ||
980 | /* If no memory, reclaim some slab memory, |
980 | /* If no memory, reclaim some slab memory, |
981 | if it does not help, reclaim all */ |
981 | if it does not help, reclaim all */ |
982 | if (!zone && !(flags & FRAME_NO_RECLAIM)) { |
982 | if (!zone && !(flags & FRAME_NO_RECLAIM)) { |
983 | freed = slab_reclaim(0); |
983 | freed = slab_reclaim(0); |
984 | if (freed) |
984 | if (freed) |
985 | zone = find_free_zone_and_lock(order, pzone); |
985 | zone = find_free_zone_and_lock(order, pzone); |
986 | if (!zone) { |
986 | if (!zone) { |
987 | freed = slab_reclaim(SLAB_RECLAIM_ALL); |
987 | freed = slab_reclaim(SLAB_RECLAIM_ALL); |
988 | if (freed) |
988 | if (freed) |
989 | zone = find_free_zone_and_lock(order, pzone); |
989 | zone = find_free_zone_and_lock(order, pzone); |
990 | } |
990 | } |
991 | } |
991 | } |
992 | if (!zone) { |
992 | if (!zone) { |
993 | /* |
993 | /* |
994 | * TODO: Sleep until frames are available again. |
994 | * TODO: Sleep until frames are available again. |
995 | */ |
995 | */ |
996 | interrupts_restore(ipl); |
996 | interrupts_restore(ipl); |
997 | 997 | ||
998 | if (flags & FRAME_ATOMIC) |
998 | if (flags & FRAME_ATOMIC) |
999 | return 0; |
999 | return 0; |
1000 | 1000 | ||
1001 | panic("Sleep not implemented.\n"); |
1001 | panic("Sleep not implemented.\n"); |
1002 | goto loop; |
1002 | goto loop; |
1003 | } |
1003 | } |
1004 | 1004 | ||
1005 | v = zone_frame_alloc(zone, order); |
1005 | v = zone_frame_alloc(zone, order); |
1006 | v += zone->base; |
1006 | v += zone->base; |
1007 | 1007 | ||
1008 | spinlock_unlock(&zone->lock); |
1008 | spinlock_unlock(&zone->lock); |
1009 | interrupts_restore(ipl); |
1009 | interrupts_restore(ipl); |
1010 | 1010 | ||
1011 | if (flags & FRAME_KA) |
1011 | if (flags & FRAME_KA) |
1012 | return (void *)PA2KA(PFN2ADDR(v)); |
1012 | return (void *)PA2KA(PFN2ADDR(v)); |
1013 | return (void *)PFN2ADDR(v); |
1013 | return (void *)PFN2ADDR(v); |
1014 | } |
1014 | } |
1015 | 1015 | ||
1016 | /** Free a frame. |
1016 | /** Free a frame. |
1017 | * |
1017 | * |
1018 | * Find respective frame structure for supplied physical frame address. |
1018 | * Find respective frame structure for supplied physical frame address. |
1019 | * Decrement frame reference count. |
1019 | * Decrement frame reference count. |
1020 | * If it drops to zero, move the frame structure to free list. |
1020 | * If it drops to zero, move the frame structure to free list. |
1021 | * |
1021 | * |
1022 | * @param Frame Physical Address of of the frame to be freed. |
1022 | * @param Frame Physical Address of of the frame to be freed. |
1023 | */ |
1023 | */ |
1024 | void frame_free(uintptr_t frame) |
1024 | void frame_free(uintptr_t frame) |
1025 | { |
1025 | { |
1026 | ipl_t ipl; |
1026 | ipl_t ipl; |
1027 | zone_t *zone; |
1027 | zone_t *zone; |
1028 | pfn_t pfn = ADDR2PFN(frame); |
1028 | pfn_t pfn = ADDR2PFN(frame); |
1029 | 1029 | ||
1030 | ipl = interrupts_disable(); |
1030 | ipl = interrupts_disable(); |
1031 | 1031 | ||
1032 | /* |
1032 | /* |
1033 | * First, find host frame zone for addr. |
1033 | * First, find host frame zone for addr. |
1034 | */ |
1034 | */ |
1035 | zone = find_zone_and_lock(pfn,NULL); |
1035 | zone = find_zone_and_lock(pfn,NULL); |
1036 | ASSERT(zone); |
1036 | ASSERT(zone); |
1037 | 1037 | ||
1038 | zone_frame_free(zone, pfn-zone->base); |
1038 | zone_frame_free(zone, pfn-zone->base); |
1039 | 1039 | ||
1040 | spinlock_unlock(&zone->lock); |
1040 | spinlock_unlock(&zone->lock); |
1041 | interrupts_restore(ipl); |
1041 | interrupts_restore(ipl); |
1042 | } |
1042 | } |
1043 | 1043 | ||
1044 | /** Add reference to frame. |
1044 | /** Add reference to frame. |
1045 | * |
1045 | * |
1046 | * Find respective frame structure for supplied PFN and |
1046 | * Find respective frame structure for supplied PFN and |
1047 | * increment frame reference count. |
1047 | * increment frame reference count. |
1048 | * |
1048 | * |
1049 | * @param pfn Frame number of the frame to be freed. |
1049 | * @param pfn Frame number of the frame to be freed. |
1050 | */ |
1050 | */ |
1051 | void frame_reference_add(pfn_t pfn) |
1051 | void frame_reference_add(pfn_t pfn) |
1052 | { |
1052 | { |
1053 | ipl_t ipl; |
1053 | ipl_t ipl; |
1054 | zone_t *zone; |
1054 | zone_t *zone; |
1055 | frame_t *frame; |
1055 | frame_t *frame; |
1056 | 1056 | ||
1057 | ipl = interrupts_disable(); |
1057 | ipl = interrupts_disable(); |
1058 | 1058 | ||
1059 | /* |
1059 | /* |
1060 | * First, find host frame zone for addr. |
1060 | * First, find host frame zone for addr. |
1061 | */ |
1061 | */ |
1062 | zone = find_zone_and_lock(pfn,NULL); |
1062 | zone = find_zone_and_lock(pfn,NULL); |
1063 | ASSERT(zone); |
1063 | ASSERT(zone); |
1064 | 1064 | ||
1065 | frame = &zone->frames[pfn-zone->base]; |
1065 | frame = &zone->frames[pfn-zone->base]; |
1066 | frame->refcount++; |
1066 | frame->refcount++; |
1067 | 1067 | ||
1068 | spinlock_unlock(&zone->lock); |
1068 | spinlock_unlock(&zone->lock); |
1069 | interrupts_restore(ipl); |
1069 | interrupts_restore(ipl); |
1070 | } |
1070 | } |
1071 | 1071 | ||
1072 | /** Mark given range unavailable in frame zones */ |
1072 | /** Mark given range unavailable in frame zones */ |
1073 | void frame_mark_unavailable(pfn_t start, count_t count) |
1073 | void frame_mark_unavailable(pfn_t start, count_t count) |
1074 | { |
1074 | { |
1075 | unsigned int i; |
1075 | unsigned int i; |
1076 | zone_t *zone; |
1076 | zone_t *zone; |
1077 | unsigned int prefzone = 0; |
1077 | unsigned int prefzone = 0; |
1078 | 1078 | ||
1079 | for (i = 0; i < count; i++) { |
1079 | for (i = 0; i < count; i++) { |
1080 | zone = find_zone_and_lock(start + i, &prefzone); |
1080 | zone = find_zone_and_lock(start + i, &prefzone); |
1081 | if (!zone) /* PFN not found */ |
1081 | if (!zone) /* PFN not found */ |
1082 | continue; |
1082 | continue; |
1083 | zone_mark_unavailable(zone, start + i - zone->base); |
1083 | zone_mark_unavailable(zone, start + i - zone->base); |
1084 | 1084 | ||
1085 | spinlock_unlock(&zone->lock); |
1085 | spinlock_unlock(&zone->lock); |
1086 | } |
1086 | } |
1087 | } |
1087 | } |
1088 | 1088 | ||
1089 | /** Initialize physical memory management |
1089 | /** Initialize physical memory management |
1090 | * |
1090 | * |
1091 | * Initialize physical memory managemnt. |
1091 | * Initialize physical memory managemnt. |
1092 | */ |
1092 | */ |
1093 | void frame_init(void) |
1093 | void frame_init(void) |
1094 | { |
1094 | { |
1095 | if (config.cpu_active == 1) { |
1095 | if (config.cpu_active == 1) { |
1096 | zones.count = 0; |
1096 | zones.count = 0; |
1097 | spinlock_initialize(&zones.lock, "zones.lock"); |
1097 | spinlock_initialize(&zones.lock, "zones.lock"); |
1098 | } |
1098 | } |
1099 | /* Tell the architecture to create some memory */ |
1099 | /* Tell the architecture to create some memory */ |
1100 | frame_arch_init(); |
1100 | frame_arch_init(); |
1101 | if (config.cpu_active == 1) { |
1101 | if (config.cpu_active == 1) { |
1102 | frame_mark_unavailable(ADDR2PFN(KA2PA(config.base)), |
1102 | frame_mark_unavailable(ADDR2PFN(KA2PA(config.base)), |
1103 | SIZE2FRAMES(config.kernel_size)); |
1103 | SIZE2FRAMES(config.kernel_size)); |
1104 | frame_mark_unavailable(ADDR2PFN(KA2PA(config.stack_base)), |
1104 | frame_mark_unavailable(ADDR2PFN(KA2PA(config.stack_base)), |
1105 | SIZE2FRAMES(config.stack_size)); |
1105 | SIZE2FRAMES(config.stack_size)); |
1106 | 1106 | ||
1107 | count_t i; |
1107 | count_t i; |
1108 | for (i = 0; i < init.cnt; i++) { |
1108 | for (i = 0; i < init.cnt; i++) { |
1109 | pfn_t pfn = ADDR2PFN(KA2PA(init.tasks[i].addr)); |
1109 | pfn_t pfn = ADDR2PFN(KA2PA(init.tasks[i].addr)); |
1110 | frame_mark_unavailable(pfn, |
1110 | frame_mark_unavailable(pfn, |
1111 | SIZE2FRAMES(init.tasks[i].size)); |
1111 | SIZE2FRAMES(init.tasks[i].size)); |
1112 | } |
1112 | } |
1113 | 1113 | ||
1114 | if (ballocs.size) |
1114 | if (ballocs.size) |
1115 | frame_mark_unavailable(ADDR2PFN(KA2PA(ballocs.base)), |
1115 | frame_mark_unavailable(ADDR2PFN(KA2PA(ballocs.base)), |
1116 | SIZE2FRAMES(ballocs.size)); |
1116 | SIZE2FRAMES(ballocs.size)); |
1117 | 1117 | ||
1118 | /* Black list first frame, as allocating NULL would |
1118 | /* Black list first frame, as allocating NULL would |
1119 | * fail in some places */ |
1119 | * fail in some places */ |
1120 | frame_mark_unavailable(0, 1); |
1120 | frame_mark_unavailable(0, 1); |
1121 | } |
1121 | } |
1122 | } |
1122 | } |
1123 | 1123 | ||
1124 | 1124 | ||
1125 | /** Return total size of all zones |
1125 | /** Return total size of all zones |
1126 | * |
1126 | * |
1127 | */ |
1127 | */ |
1128 | uint64_t zone_total_size(void) { |
1128 | uint64_t zone_total_size(void) { |
1129 | zone_t *zone = NULL; |
1129 | zone_t *zone = NULL; |
1130 | unsigned int i; |
1130 | unsigned int i; |
1131 | ipl_t ipl; |
1131 | ipl_t ipl; |
1132 | uint64_t total = 0; |
1132 | uint64_t total = 0; |
1133 | 1133 | ||
1134 | ipl = interrupts_disable(); |
1134 | ipl = interrupts_disable(); |
1135 | spinlock_lock(&zones.lock); |
1135 | spinlock_lock(&zones.lock); |
1136 | 1136 | ||
1137 | for (i = 0; i < zones.count; i++) { |
1137 | for (i = 0; i < zones.count; i++) { |
1138 | zone = zones.info[i]; |
1138 | zone = zones.info[i]; |
1139 | spinlock_lock(&zone->lock); |
1139 | spinlock_lock(&zone->lock); |
1140 | total += (uint64_t) FRAMES2SIZE(zone->count); |
1140 | total += (uint64_t) FRAMES2SIZE(zone->count); |
1141 | spinlock_unlock(&zone->lock); |
1141 | spinlock_unlock(&zone->lock); |
1142 | } |
1142 | } |
1143 | 1143 | ||
1144 | spinlock_unlock(&zones.lock); |
1144 | spinlock_unlock(&zones.lock); |
1145 | interrupts_restore(ipl); |
1145 | interrupts_restore(ipl); |
1146 | 1146 | ||
1147 | return total; |
1147 | return total; |
1148 | } |
1148 | } |
1149 | 1149 | ||
1150 | 1150 | ||
1151 | 1151 | ||
1152 | /** Prints list of zones |
1152 | /** Prints list of zones |
1153 | * |
1153 | * |
1154 | */ |
1154 | */ |
1155 | void zone_print_list(void) { |
1155 | void zone_print_list(void) { |
1156 | zone_t *zone = NULL; |
1156 | zone_t *zone = NULL; |
1157 | unsigned int i; |
1157 | unsigned int i; |
1158 | ipl_t ipl; |
1158 | ipl_t ipl; |
1159 | 1159 | ||
1160 | ipl = interrupts_disable(); |
1160 | ipl = interrupts_disable(); |
1161 | spinlock_lock(&zones.lock); |
1161 | spinlock_lock(&zones.lock); |
1162 | 1162 | ||
1163 | if (sizeof(void *) == 4) { |
1163 | if (sizeof(void *) == 4) { |
1164 | printf("# base address free frames busy frames\n"); |
1164 | printf("# base address free frames busy frames\n"); |
1165 | printf("-- ------------ ------------ ------------\n"); |
1165 | printf("-- ------------ ------------ ------------\n"); |
1166 | } else { |
1166 | } else { |
1167 | printf("# base address free frames busy frames\n"); |
1167 | printf("# base address free frames busy frames\n"); |
1168 | printf("-- -------------------- ------------ ------------\n"); |
1168 | printf("-- -------------------- ------------ ------------\n"); |
1169 | } |
1169 | } |
1170 | 1170 | ||
1171 | for (i = 0; i < zones.count; i++) { |
1171 | for (i = 0; i < zones.count; i++) { |
1172 | zone = zones.info[i]; |
1172 | zone = zones.info[i]; |
1173 | spinlock_lock(&zone->lock); |
1173 | spinlock_lock(&zone->lock); |
1174 | 1174 | ||
1175 | if (sizeof(void *) == 4) |
1175 | if (sizeof(void *) == 4) |
1176 | printf("%-2d %#10zx %12zd %12zd\n", i, PFN2ADDR(zone->base), |
1176 | printf("%-2d %#10zx %12zd %12zd\n", i, PFN2ADDR(zone->base), |
1177 | zone->free_count, zone->busy_count); |
1177 | zone->free_count, zone->busy_count); |
1178 | else |
1178 | else |
1179 | printf("%-2d %#18zx %12zd %12zd\n", i, PFN2ADDR(zone->base), |
1179 | printf("%-2d %#18zx %12zd %12zd\n", i, PFN2ADDR(zone->base), |
1180 | zone->free_count, zone->busy_count); |
1180 | zone->free_count, zone->busy_count); |
1181 | 1181 | ||
1182 | spinlock_unlock(&zone->lock); |
1182 | spinlock_unlock(&zone->lock); |
1183 | } |
1183 | } |
1184 | 1184 | ||
1185 | spinlock_unlock(&zones.lock); |
1185 | spinlock_unlock(&zones.lock); |
1186 | interrupts_restore(ipl); |
1186 | interrupts_restore(ipl); |
1187 | } |
1187 | } |
1188 | 1188 | ||
1189 | /** Prints zone details. |
1189 | /** Prints zone details. |
1190 | * |
1190 | * |
1191 | * @param num Zone base address or zone number. |
1191 | * @param num Zone base address or zone number. |
1192 | */ |
1192 | */ |
1193 | void zone_print_one(unsigned int num) { |
1193 | void zone_print_one(unsigned int num) { |
1194 | zone_t *zone = NULL; |
1194 | zone_t *zone = NULL; |
1195 | ipl_t ipl; |
1195 | ipl_t ipl; |
1196 | unsigned int i; |
1196 | unsigned int i; |
1197 | 1197 | ||
1198 | ipl = interrupts_disable(); |
1198 | ipl = interrupts_disable(); |
1199 | spinlock_lock(&zones.lock); |
1199 | spinlock_lock(&zones.lock); |
1200 | 1200 | ||
1201 | for (i = 0; i < zones.count; i++) { |
1201 | for (i = 0; i < zones.count; i++) { |
1202 | if ((i == num) || (PFN2ADDR(zones.info[i]->base) == num)) { |
1202 | if ((i == num) || (PFN2ADDR(zones.info[i]->base) == num)) { |
1203 | zone = zones.info[i]; |
1203 | zone = zones.info[i]; |
1204 | break; |
1204 | break; |
1205 | } |
1205 | } |
1206 | } |
1206 | } |
1207 | if (!zone) { |
1207 | if (!zone) { |
1208 | printf("Zone not found.\n"); |
1208 | printf("Zone not found.\n"); |
1209 | goto out; |
1209 | goto out; |
1210 | } |
1210 | } |
1211 | 1211 | ||
1212 | spinlock_lock(&zone->lock); |
1212 | spinlock_lock(&zone->lock); |
1213 | printf("Memory zone information\n"); |
1213 | printf("Memory zone information\n"); |
1214 | printf("Zone base address: %#.*p\n", sizeof(uintptr_t) * 2, |
1214 | printf("Zone base address: %#.*p\n", sizeof(uintptr_t) * 2, |
1215 | PFN2ADDR(zone->base)); |
1215 | PFN2ADDR(zone->base)); |
1216 | printf("Zone size: %zd frames (%zd KB)\n", zone->count, |
1216 | printf("Zone size: %zd frames (%zd KB)\n", zone->count, |
1217 | SIZE2KB(FRAMES2SIZE(zone->count))); |
1217 | SIZE2KB(FRAMES2SIZE(zone->count))); |
1218 | printf("Allocated space: %zd frames (%zd KB)\n", zone->busy_count, |
1218 | printf("Allocated space: %zd frames (%zd KB)\n", zone->busy_count, |
1219 | SIZE2KB(FRAMES2SIZE(zone->busy_count))); |
1219 | SIZE2KB(FRAMES2SIZE(zone->busy_count))); |
1220 | printf("Available space: %zd frames (%zd KB)\n", zone->free_count, |
1220 | printf("Available space: %zd frames (%zd KB)\n", zone->free_count, |
1221 | SIZE2KB(FRAMES2SIZE(zone->free_count))); |
1221 | SIZE2KB(FRAMES2SIZE(zone->free_count))); |
1222 | buddy_system_structure_print(zone->buddy_system, FRAME_SIZE); |
1222 | buddy_system_structure_print(zone->buddy_system, FRAME_SIZE); |
1223 | spinlock_unlock(&zone->lock); |
1223 | spinlock_unlock(&zone->lock); |
1224 | 1224 | ||
1225 | out: |
1225 | out: |
1226 | spinlock_unlock(&zones.lock); |
1226 | spinlock_unlock(&zones.lock); |
1227 | interrupts_restore(ipl); |
1227 | interrupts_restore(ipl); |
1228 | } |
1228 | } |
1229 | 1229 | ||
1230 | /** @} |
1230 | /** @} |
1231 | */ |
1231 | */ |
1232 | 1232 | ||
1233 | 1233 |