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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 | /* |
30 | /* |
31 | * Locking order |
31 | * Locking order |
32 | * |
32 | * |
33 | * In order to access particular zone, the process must first lock |
33 | * In order to access particular zone, the process must first lock |
34 | * the zones.lock, then lock the zone and then unlock the zones.lock. |
34 | * the zones.lock, then lock the zone and then unlock the zones.lock. |
35 | * This insures, that we can fiddle with the zones in runtime without |
35 | * This insures, that we can fiddle with the zones in runtime without |
36 | * affecting the processes. |
36 | * affecting the processes. |
37 | * |
37 | * |
38 | */ |
38 | */ |
39 | 39 | ||
40 | #include <typedefs.h> |
40 | #include <typedefs.h> |
41 | #include <arch/types.h> |
41 | #include <arch/types.h> |
42 | #include <mm/frame.h> |
42 | #include <mm/frame.h> |
43 | #include <mm/as.h> |
43 | #include <mm/as.h> |
44 | #include <panic.h> |
44 | #include <panic.h> |
45 | #include <debug.h> |
45 | #include <debug.h> |
46 | #include <adt/list.h> |
46 | #include <adt/list.h> |
47 | #include <synch/spinlock.h> |
47 | #include <synch/spinlock.h> |
48 | #include <arch/asm.h> |
48 | #include <arch/asm.h> |
49 | #include <arch.h> |
49 | #include <arch.h> |
50 | #include <print.h> |
50 | #include <print.h> |
51 | #include <align.h> |
51 | #include <align.h> |
52 | #include <mm/slab.h> |
52 | #include <mm/slab.h> |
53 | #include <bitops.h> |
53 | #include <bitops.h> |
54 | 54 | ||
55 | typedef struct { |
55 | typedef struct { |
56 | count_t refcount; /**< tracking of shared frames */ |
56 | count_t refcount; /**< tracking of shared frames */ |
57 | __u8 buddy_order; /**< buddy system block order */ |
57 | __u8 buddy_order; /**< buddy system block order */ |
58 | link_t buddy_link; /**< link to the next free block inside one order */ |
58 | link_t buddy_link; /**< link to the next free block inside one order */ |
59 | void *parent; /**< If allocated by slab, this points there */ |
59 | void *parent; /**< If allocated by slab, this points there */ |
60 | }frame_t; |
60 | }frame_t; |
61 | 61 | ||
62 | typedef struct { |
62 | typedef struct { |
63 | SPINLOCK_DECLARE(lock); /**< this lock protects everything below */ |
63 | SPINLOCK_DECLARE(lock); /**< this lock protects everything below */ |
64 | pfn_t base; /**< frame_no of the first frame in the frames array */ |
64 | pfn_t base; /**< frame_no of the first frame in the frames array */ |
65 | count_t count; /**< Size of zone */ |
65 | count_t count; /**< Size of zone */ |
66 | 66 | ||
67 | frame_t *frames; /**< array of frame_t structures in this zone */ |
67 | frame_t *frames; /**< array of frame_t structures in this zone */ |
68 | count_t free_count; /**< number of free frame_t structures */ |
68 | count_t free_count; /**< number of free frame_t structures */ |
69 | count_t busy_count; /**< number of busy frame_t structures */ |
69 | count_t busy_count; /**< number of busy frame_t structures */ |
70 | 70 | ||
71 | buddy_system_t * buddy_system; /**< buddy system for the zone */ |
71 | buddy_system_t * buddy_system; /**< buddy system for the zone */ |
72 | int flags; |
72 | int flags; |
73 | }zone_t; |
73 | }zone_t; |
74 | 74 | ||
75 | /* |
75 | /* |
76 | * The zoneinfo.lock must be locked when accessing zoneinfo structure. |
76 | * The zoneinfo.lock must be locked when accessing zoneinfo structure. |
77 | * Some of the attributes in zone_t structures are 'read-only' |
77 | * Some of the attributes in zone_t structures are 'read-only' |
78 | */ |
78 | */ |
79 | 79 | ||
80 | struct { |
80 | struct { |
81 | SPINLOCK_DECLARE(lock); |
81 | SPINLOCK_DECLARE(lock); |
82 | int count; |
82 | int count; |
83 | zone_t *info[ZONES_MAX]; |
83 | zone_t *info[ZONES_MAX]; |
84 | }zones; |
84 | }zones; |
85 | 85 | ||
86 | 86 | ||
87 | /*********************************/ |
87 | /*********************************/ |
88 | /* Helper functions */ |
88 | /* Helper functions */ |
89 | static inline index_t frame_index(zone_t *zone, frame_t *frame) |
89 | static inline index_t frame_index(zone_t *zone, frame_t *frame) |
90 | { |
90 | { |
91 | return (index_t)(frame - zone->frames); |
91 | return (index_t)(frame - zone->frames); |
92 | } |
92 | } |
93 | static inline index_t frame_index_abs(zone_t *zone, frame_t *frame) |
93 | static inline index_t frame_index_abs(zone_t *zone, frame_t *frame) |
94 | { |
94 | { |
95 | return (index_t)(frame - zone->frames) + zone->base; |
95 | return (index_t)(frame - zone->frames) + zone->base; |
96 | } |
96 | } |
97 | static inline int frame_index_valid(zone_t *zone, index_t index) |
97 | static inline int frame_index_valid(zone_t *zone, index_t index) |
98 | { |
98 | { |
99 | return index >= 0 && index < zone->count; |
99 | return index >= 0 && index < zone->count; |
100 | } |
100 | } |
101 | 101 | ||
102 | /** Compute pfn_t from frame_t pointer & zone pointer */ |
102 | /** Compute pfn_t from frame_t pointer & zone pointer */ |
103 | static index_t make_frame_index(zone_t *zone, frame_t *frame) |
103 | static index_t make_frame_index(zone_t *zone, frame_t *frame) |
104 | { |
104 | { |
105 | return frame - zone->frames; |
105 | return frame - zone->frames; |
106 | } |
106 | } |
107 | 107 | ||
108 | /** Initialize frame structure |
108 | /** Initialize frame structure |
109 | * |
109 | * |
110 | * Initialize frame structure. |
110 | * Initialize frame structure. |
111 | * |
111 | * |
112 | * @param frame Frame structure to be initialized. |
112 | * @param frame Frame structure to be initialized. |
113 | */ |
113 | */ |
114 | static void frame_initialize(frame_t *frame) |
114 | static void frame_initialize(frame_t *frame) |
115 | { |
115 | { |
116 | frame->refcount = 1; |
116 | frame->refcount = 1; |
117 | frame->buddy_order = 0; |
117 | frame->buddy_order = 0; |
118 | } |
118 | } |
119 | 119 | ||
120 | /*************************************/ |
120 | /*************************************/ |
121 | /* Zoneinfo functions */ |
121 | /* Zoneinfo functions */ |
122 | 122 | ||
123 | /** |
123 | /** |
124 | * Insert-sort zone into zones list |
124 | * Insert-sort zone into zones list |
125 | * |
125 | * |
126 | * @return zone number on success, -1 on error |
126 | * @return zone number on success, -1 on error |
127 | */ |
127 | */ |
128 | static int zones_add_zone(zone_t *newzone) |
128 | static int zones_add_zone(zone_t *newzone) |
129 | { |
129 | { |
130 | int i,j; |
130 | int i,j; |
131 | ipl_t ipl; |
131 | ipl_t ipl; |
132 | zone_t *z; |
132 | zone_t *z; |
133 | 133 | ||
134 | ipl = interrupts_disable(); |
134 | ipl = interrupts_disable(); |
135 | spinlock_lock(&zones.lock); |
135 | spinlock_lock(&zones.lock); |
136 | /* Try to merge */ |
136 | /* Try to merge */ |
137 | if (zones.count+1 == ZONES_MAX) |
137 | if (zones.count+1 == ZONES_MAX) |
138 | panic("Maximum zone(%d) count exceeded.", ZONES_MAX); |
138 | panic("Maximum zone(%d) count exceeded.", ZONES_MAX); |
139 | - | ||
140 | for (i=0; i < zones.count; i++) { |
139 | for (i=0; i < zones.count; i++) { |
141 | /* Check for overflow */ |
140 | /* Check for overflow */ |
142 | z = zones.info[zones.count]; |
141 | z = zones.info[i]; |
143 | if (overlaps(newzone->base,newzone->count, |
142 | if (overlaps(newzone->base,newzone->count, |
144 | z->base, z->count)) { |
143 | z->base, z->count)) { |
145 | printf("Zones overlap!\n"); |
144 | printf("Zones overlap!\n"); |
146 | return -1; |
145 | return -1; |
147 | } |
146 | } |
148 | if (z->base < newzone->base) |
147 | if (newzone->base < z->base) |
149 | break; |
148 | break; |
150 | } |
149 | } |
151 | /* Move other zones up */ |
150 | /* Move other zones up */ |
152 | for (j=i;j < zones.count;j++) |
151 | for (j=i;j < zones.count;j++) |
153 | zones.info[j+1] = zones.info[j]; |
152 | zones.info[j+1] = zones.info[j]; |
154 | - | ||
155 | zones.info[i] = newzone; |
153 | zones.info[i] = newzone; |
156 | zones.count++; |
154 | zones.count++; |
157 | - | ||
158 | spinlock_unlock(&zones.lock); |
155 | spinlock_unlock(&zones.lock); |
159 | interrupts_restore(ipl); |
156 | interrupts_restore(ipl); |
160 | 157 | ||
161 | return i; |
158 | return i; |
162 | } |
159 | } |
163 | 160 | ||
164 | /** |
161 | /** |
165 | * Try to find a zone where can we find the frame |
162 | * Try to find a zone where can we find the frame |
166 | * |
163 | * |
167 | * @param hint Start searching in zone 'hint' |
164 | * @param hint Start searching in zone 'hint' |
168 | * @param lock Lock zone if true |
165 | * @param lock Lock zone if true |
169 | * |
166 | * |
170 | * Assume interrupts disable |
167 | * Assume interrupts disable |
171 | */ |
168 | */ |
172 | static zone_t * find_zone_and_lock(pfn_t frame, int *pzone) |
169 | static zone_t * find_zone_and_lock(pfn_t frame, int *pzone) |
173 | { |
170 | { |
174 | int i; |
171 | int i; |
175 | int hint = pzone ? *pzone : 0; |
172 | int hint = pzone ? *pzone : 0; |
176 | zone_t *z; |
173 | zone_t *z; |
177 | 174 | ||
178 | spinlock_lock(&zones.lock); |
175 | spinlock_lock(&zones.lock); |
179 | 176 | ||
180 | if (hint >= zones.count || hint < 0) |
177 | if (hint >= zones.count || hint < 0) |
181 | hint = 0; |
178 | hint = 0; |
182 | 179 | ||
183 | i = hint; |
180 | i = hint; |
184 | do { |
181 | do { |
185 | z = zones.info[i]; |
182 | z = zones.info[i]; |
186 | spinlock_lock(&z->lock); |
183 | spinlock_lock(&z->lock); |
187 | if (z->base <= frame && z->base + z->count > frame) { |
184 | if (z->base <= frame && z->base + z->count > frame) { |
188 | spinlock_unlock(&zones.lock); /* Unlock the global lock */ |
185 | spinlock_unlock(&zones.lock); /* Unlock the global lock */ |
189 | if (pzone) |
186 | if (pzone) |
190 | *pzone = i; |
187 | *pzone = i; |
191 | return z; |
188 | return z; |
192 | } |
189 | } |
193 | spinlock_unlock(&z->lock); |
190 | spinlock_unlock(&z->lock); |
194 | 191 | ||
195 | i++; |
192 | i++; |
196 | if (i >= zones.count) |
193 | if (i >= zones.count) |
197 | i = 0; |
194 | i = 0; |
198 | } while(i != hint); |
195 | } while(i != hint); |
199 | 196 | ||
200 | spinlock_unlock(&zones.lock); |
197 | spinlock_unlock(&zones.lock); |
201 | return NULL; |
198 | return NULL; |
202 | } |
199 | } |
203 | 200 | ||
204 | /** @return True if zone can allocate specified order */ |
201 | /** @return True if zone can allocate specified order */ |
205 | static int zone_can_alloc(zone_t *z, __u8 order) |
202 | static int zone_can_alloc(zone_t *z, __u8 order) |
206 | { |
203 | { |
207 | return buddy_system_can_alloc(z->buddy_system, order); |
204 | return buddy_system_can_alloc(z->buddy_system, order); |
208 | } |
205 | } |
209 | 206 | ||
210 | /** |
207 | /** |
211 | * Find AND LOCK zone that can allocate order frames |
208 | * Find AND LOCK zone that can allocate order frames |
212 | * |
209 | * |
213 | * Assume interrupts are disabled!! |
210 | * Assume interrupts are disabled!! |
214 | * |
211 | * |
215 | * @param pzone Pointer to preferred zone or NULL, on return contains zone number |
212 | * @param pzone Pointer to preferred zone or NULL, on return contains zone number |
216 | */ |
213 | */ |
217 | static zone_t * find_free_zone_lock(__u8 order, int *pzone) |
214 | static zone_t * find_free_zone_lock(__u8 order, int *pzone) |
218 | { |
215 | { |
219 | int i; |
216 | int i; |
220 | zone_t *z; |
217 | zone_t *z; |
221 | int hint = pzone ? *pzone : 0; |
218 | int hint = pzone ? *pzone : 0; |
222 | 219 | ||
223 | spinlock_lock(&zones.lock); |
220 | spinlock_lock(&zones.lock); |
224 | if (hint >= zones.count) |
221 | if (hint >= zones.count) |
225 | hint = 0; |
222 | hint = 0; |
226 | i = hint; |
223 | i = hint; |
227 | do { |
224 | do { |
228 | z = zones.info[i]; |
225 | z = zones.info[i]; |
229 | 226 | ||
230 | spinlock_lock(&z->lock); |
227 | spinlock_lock(&z->lock); |
231 | 228 | ||
232 | /* Check if the zone has 2^order frames area available */ |
229 | /* Check if the zone has 2^order frames area available */ |
233 | if (zone_can_alloc(z, order)) { |
230 | if (zone_can_alloc(z, order)) { |
234 | spinlock_unlock(&zones.lock); |
231 | spinlock_unlock(&zones.lock); |
235 | if (pzone) |
232 | if (pzone) |
236 | *pzone = i; |
233 | *pzone = i; |
237 | return z; |
234 | return z; |
238 | } |
235 | } |
239 | spinlock_unlock(&z->lock); |
236 | spinlock_unlock(&z->lock); |
240 | if (++i >= zones.count) |
237 | if (++i >= zones.count) |
241 | i = 0; |
238 | i = 0; |
242 | } while(i != hint); |
239 | } while(i != hint); |
243 | spinlock_unlock(&zones.lock); |
240 | spinlock_unlock(&zones.lock); |
244 | return NULL; |
241 | return NULL; |
245 | } |
242 | } |
246 | 243 | ||
247 | /********************************************/ |
244 | /********************************************/ |
248 | /* Buddy system functions */ |
245 | /* Buddy system functions */ |
249 | 246 | ||
250 | /** Buddy system find_block implementation |
247 | /** Buddy system find_block implementation |
251 | * |
248 | * |
252 | * Find block that is parent of current list. |
249 | * Find block that is parent of current list. |
253 | * That means go to lower addresses, until such block is found |
250 | * That means go to lower addresses, until such block is found |
254 | * |
251 | * |
255 | * @param order - Order of parent must be different then this parameter!! |
252 | * @param order - Order of parent must be different then this parameter!! |
256 | */ |
253 | */ |
257 | static link_t *zone_buddy_find_block(buddy_system_t *b, link_t *child, |
254 | static link_t *zone_buddy_find_block(buddy_system_t *b, link_t *child, |
258 | __u8 order) |
255 | __u8 order) |
259 | { |
256 | { |
260 | frame_t * frame; |
257 | frame_t * frame; |
261 | zone_t * zone; |
258 | zone_t * zone; |
262 | index_t index; |
259 | index_t index; |
263 | 260 | ||
264 | frame = list_get_instance(child, frame_t, buddy_link); |
261 | frame = list_get_instance(child, frame_t, buddy_link); |
265 | zone = (zone_t *) b->data; |
262 | zone = (zone_t *) b->data; |
266 | 263 | ||
267 | index = frame_index(zone, frame); |
264 | index = frame_index(zone, frame); |
268 | do { |
265 | do { |
269 | if (zone->frames[index].buddy_order != order) { |
266 | if (zone->frames[index].buddy_order != order) { |
270 | return &zone->frames[index].buddy_link; |
267 | return &zone->frames[index].buddy_link; |
271 | } |
268 | } |
272 | } while(index-- > 0); |
269 | } while(index-- > 0); |
273 | return NULL; |
270 | return NULL; |
274 | } |
271 | } |
275 | 272 | ||
276 | static void zone_buddy_print_id(buddy_system_t *b, link_t *block) |
273 | static void zone_buddy_print_id(buddy_system_t *b, link_t *block) |
277 | { |
274 | { |
278 | frame_t * frame; |
275 | frame_t * frame; |
279 | zone_t * zone; |
276 | zone_t * zone; |
280 | index_t index; |
277 | index_t index; |
281 | 278 | ||
282 | frame = list_get_instance(block, frame_t, buddy_link); |
279 | frame = list_get_instance(block, frame_t, buddy_link); |
283 | zone = (zone_t *) b->data; |
280 | zone = (zone_t *) b->data; |
284 | index = frame_index(zone, frame); |
281 | index = frame_index(zone, frame); |
285 | printf("%d", index); |
282 | printf("%d", index); |
286 | } |
283 | } |
287 | 284 | ||
288 | /** Buddy system find_buddy implementation |
285 | /** Buddy system find_buddy implementation |
289 | * |
286 | * |
290 | * @param b Buddy system. |
287 | * @param b Buddy system. |
291 | * @param block Block for which buddy should be found |
288 | * @param block Block for which buddy should be found |
292 | * |
289 | * |
293 | * @return Buddy for given block if found |
290 | * @return Buddy for given block if found |
294 | */ |
291 | */ |
295 | static link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * block) |
292 | static link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * block) |
296 | { |
293 | { |
297 | frame_t * frame; |
294 | frame_t * frame; |
298 | zone_t * zone; |
295 | zone_t * zone; |
299 | index_t index; |
296 | index_t index; |
300 | bool is_left, is_right; |
297 | bool is_left, is_right; |
301 | 298 | ||
302 | frame = list_get_instance(block, frame_t, buddy_link); |
299 | frame = list_get_instance(block, frame_t, buddy_link); |
303 | zone = (zone_t *) b->data; |
300 | zone = (zone_t *) b->data; |
304 | ASSERT(IS_BUDDY_ORDER_OK(frame_index_abs(zone, frame), frame->buddy_order)); |
301 | ASSERT(IS_BUDDY_ORDER_OK(frame_index_abs(zone, frame), frame->buddy_order)); |
305 | 302 | ||
306 | is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame); |
303 | is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame); |
307 | is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame); |
304 | is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame); |
308 | 305 | ||
309 | ASSERT(is_left ^ is_right); |
306 | ASSERT(is_left ^ is_right); |
310 | if (is_left) { |
307 | if (is_left) { |
311 | index = (frame_index(zone, frame)) + (1 << frame->buddy_order); |
308 | index = (frame_index(zone, frame)) + (1 << frame->buddy_order); |
312 | } else { // if (is_right) |
309 | } else { // if (is_right) |
313 | index = (frame_index(zone, frame)) - (1 << frame->buddy_order); |
310 | index = (frame_index(zone, frame)) - (1 << frame->buddy_order); |
314 | } |
311 | } |
315 | 312 | ||
316 | 313 | ||
317 | if (frame_index_valid(zone, index)) { |
314 | if (frame_index_valid(zone, index)) { |
318 | if (zone->frames[index].buddy_order == frame->buddy_order && |
315 | if (zone->frames[index].buddy_order == frame->buddy_order && |
319 | zone->frames[index].refcount == 0) { |
316 | zone->frames[index].refcount == 0) { |
320 | return &zone->frames[index].buddy_link; |
317 | return &zone->frames[index].buddy_link; |
321 | } |
318 | } |
322 | } |
319 | } |
323 | 320 | ||
324 | return NULL; |
321 | return NULL; |
325 | } |
322 | } |
326 | 323 | ||
327 | /** Buddy system bisect implementation |
324 | /** Buddy system bisect implementation |
328 | * |
325 | * |
329 | * @param b Buddy system. |
326 | * @param b Buddy system. |
330 | * @param block Block to bisect |
327 | * @param block Block to bisect |
331 | * |
328 | * |
332 | * @return right block |
329 | * @return right block |
333 | */ |
330 | */ |
334 | static link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block) { |
331 | static link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block) { |
335 | frame_t * frame_l, * frame_r; |
332 | frame_t * frame_l, * frame_r; |
336 | 333 | ||
337 | frame_l = list_get_instance(block, frame_t, buddy_link); |
334 | frame_l = list_get_instance(block, frame_t, buddy_link); |
338 | frame_r = (frame_l + (1 << (frame_l->buddy_order - 1))); |
335 | frame_r = (frame_l + (1 << (frame_l->buddy_order - 1))); |
339 | 336 | ||
340 | return &frame_r->buddy_link; |
337 | return &frame_r->buddy_link; |
341 | } |
338 | } |
342 | 339 | ||
343 | /** Buddy system coalesce implementation |
340 | /** Buddy system coalesce implementation |
344 | * |
341 | * |
345 | * @param b Buddy system. |
342 | * @param b Buddy system. |
346 | * @param block_1 First block |
343 | * @param block_1 First block |
347 | * @param block_2 First block's buddy |
344 | * @param block_2 First block's buddy |
348 | * |
345 | * |
349 | * @return Coalesced block (actually block that represents lower address) |
346 | * @return Coalesced block (actually block that represents lower address) |
350 | */ |
347 | */ |
351 | static link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * block_1, |
348 | static link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * block_1, |
352 | link_t * block_2) |
349 | link_t * block_2) |
353 | { |
350 | { |
354 | frame_t *frame1, *frame2; |
351 | frame_t *frame1, *frame2; |
355 | 352 | ||
356 | frame1 = list_get_instance(block_1, frame_t, buddy_link); |
353 | frame1 = list_get_instance(block_1, frame_t, buddy_link); |
357 | frame2 = list_get_instance(block_2, frame_t, buddy_link); |
354 | frame2 = list_get_instance(block_2, frame_t, buddy_link); |
358 | 355 | ||
359 | return frame1 < frame2 ? block_1 : block_2; |
356 | return frame1 < frame2 ? block_1 : block_2; |
360 | } |
357 | } |
361 | 358 | ||
362 | /** Buddy system set_order implementation |
359 | /** Buddy system set_order implementation |
363 | * |
360 | * |
364 | * @param b Buddy system. |
361 | * @param b Buddy system. |
365 | * @param block Buddy system block |
362 | * @param block Buddy system block |
366 | * @param order Order to set |
363 | * @param order Order to set |
367 | */ |
364 | */ |
368 | static void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order) { |
365 | static void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order) { |
369 | frame_t * frame; |
366 | frame_t * frame; |
370 | frame = list_get_instance(block, frame_t, buddy_link); |
367 | frame = list_get_instance(block, frame_t, buddy_link); |
371 | frame->buddy_order = order; |
368 | frame->buddy_order = order; |
372 | } |
369 | } |
373 | 370 | ||
374 | /** Buddy system get_order implementation |
371 | /** Buddy system get_order implementation |
375 | * |
372 | * |
376 | * @param b Buddy system. |
373 | * @param b Buddy system. |
377 | * @param block Buddy system block |
374 | * @param block Buddy system block |
378 | * |
375 | * |
379 | * @return Order of block |
376 | * @return Order of block |
380 | */ |
377 | */ |
381 | static __u8 zone_buddy_get_order(buddy_system_t *b, link_t * block) { |
378 | static __u8 zone_buddy_get_order(buddy_system_t *b, link_t * block) { |
382 | frame_t * frame; |
379 | frame_t * frame; |
383 | frame = list_get_instance(block, frame_t, buddy_link); |
380 | frame = list_get_instance(block, frame_t, buddy_link); |
384 | return frame->buddy_order; |
381 | return frame->buddy_order; |
385 | } |
382 | } |
386 | 383 | ||
387 | /** Buddy system mark_busy implementation |
384 | /** Buddy system mark_busy implementation |
388 | * |
385 | * |
389 | * @param b Buddy system |
386 | * @param b Buddy system |
390 | * @param block Buddy system block |
387 | * @param block Buddy system block |
391 | * |
388 | * |
392 | */ |
389 | */ |
393 | static void zone_buddy_mark_busy(buddy_system_t *b, link_t * block) { |
390 | static void zone_buddy_mark_busy(buddy_system_t *b, link_t * block) { |
394 | frame_t * frame; |
391 | frame_t * frame; |
395 | 392 | ||
396 | frame = list_get_instance(block, frame_t, buddy_link); |
393 | frame = list_get_instance(block, frame_t, buddy_link); |
397 | frame->refcount = 1; |
394 | frame->refcount = 1; |
398 | } |
395 | } |
399 | 396 | ||
400 | /** Buddy system mark_available implementation |
397 | /** Buddy system mark_available implementation |
401 | * |
398 | * |
402 | * @param b Buddy system |
399 | * @param b Buddy system |
403 | * @param block Buddy system block |
400 | * @param block Buddy system block |
404 | * |
401 | * |
405 | */ |
402 | */ |
406 | static void zone_buddy_mark_available(buddy_system_t *b, link_t * block) { |
403 | static void zone_buddy_mark_available(buddy_system_t *b, link_t * block) { |
407 | frame_t * frame; |
404 | frame_t * frame; |
408 | frame = list_get_instance(block, frame_t, buddy_link); |
405 | frame = list_get_instance(block, frame_t, buddy_link); |
409 | frame->refcount = 0; |
406 | frame->refcount = 0; |
410 | } |
407 | } |
411 | 408 | ||
412 | static struct buddy_system_operations zone_buddy_system_operations = { |
409 | static struct buddy_system_operations zone_buddy_system_operations = { |
413 | .find_buddy = zone_buddy_find_buddy, |
410 | .find_buddy = zone_buddy_find_buddy, |
414 | .bisect = zone_buddy_bisect, |
411 | .bisect = zone_buddy_bisect, |
415 | .coalesce = zone_buddy_coalesce, |
412 | .coalesce = zone_buddy_coalesce, |
416 | .set_order = zone_buddy_set_order, |
413 | .set_order = zone_buddy_set_order, |
417 | .get_order = zone_buddy_get_order, |
414 | .get_order = zone_buddy_get_order, |
418 | .mark_busy = zone_buddy_mark_busy, |
415 | .mark_busy = zone_buddy_mark_busy, |
419 | .mark_available = zone_buddy_mark_available, |
416 | .mark_available = zone_buddy_mark_available, |
420 | .find_block = zone_buddy_find_block, |
417 | .find_block = zone_buddy_find_block, |
421 | .print_id = zone_buddy_print_id |
418 | .print_id = zone_buddy_print_id |
422 | }; |
419 | }; |
423 | 420 | ||
424 | /*************************************/ |
421 | /*************************************/ |
425 | /* Zone functions */ |
422 | /* Zone functions */ |
426 | 423 | ||
427 | /** Allocate frame in particular zone |
424 | /** Allocate frame in particular zone |
428 | * |
425 | * |
429 | * Assume zone is locked |
426 | * Assume zone is locked |
430 | * Panics, if allocation is impossible. |
427 | * Panics, if allocation is impossible. |
431 | * |
428 | * |
432 | * @return Frame index in zone |
429 | * @return Frame index in zone |
433 | */ |
430 | */ |
434 | static pfn_t zone_frame_alloc(zone_t *zone,__u8 order) |
431 | static pfn_t zone_frame_alloc(zone_t *zone,__u8 order) |
435 | { |
432 | { |
436 | pfn_t v; |
433 | pfn_t v; |
437 | link_t *tmp; |
434 | link_t *tmp; |
438 | frame_t *frame; |
435 | frame_t *frame; |
439 | 436 | ||
440 | /* Allocate frames from zone buddy system */ |
437 | /* Allocate frames from zone buddy system */ |
441 | tmp = buddy_system_alloc(zone->buddy_system, order); |
438 | tmp = buddy_system_alloc(zone->buddy_system, order); |
442 | 439 | ||
443 | ASSERT(tmp); |
440 | ASSERT(tmp); |
444 | 441 | ||
445 | /* Update zone information. */ |
442 | /* Update zone information. */ |
446 | zone->free_count -= (1 << order); |
443 | zone->free_count -= (1 << order); |
447 | zone->busy_count += (1 << order); |
444 | zone->busy_count += (1 << order); |
448 | 445 | ||
449 | /* Frame will be actually a first frame of the block. */ |
446 | /* Frame will be actually a first frame of the block. */ |
450 | frame = list_get_instance(tmp, frame_t, buddy_link); |
447 | frame = list_get_instance(tmp, frame_t, buddy_link); |
451 | 448 | ||
452 | /* get frame address */ |
449 | /* get frame address */ |
453 | v = make_frame_index(zone, frame); |
450 | v = make_frame_index(zone, frame); |
454 | return v; |
451 | return v; |
455 | } |
452 | } |
456 | 453 | ||
457 | /** Free frame from zone |
454 | /** Free frame from zone |
458 | * |
455 | * |
459 | * Assume zone is locked |
456 | * Assume zone is locked |
460 | */ |
457 | */ |
461 | static void zone_frame_free(zone_t *zone, index_t frame_idx) |
458 | static void zone_frame_free(zone_t *zone, index_t frame_idx) |
462 | { |
459 | { |
463 | frame_t *frame; |
460 | frame_t *frame; |
464 | __u8 order; |
461 | __u8 order; |
465 | 462 | ||
466 | frame = &zone->frames[frame_idx]; |
463 | frame = &zone->frames[frame_idx]; |
467 | 464 | ||
468 | /* remember frame order */ |
465 | /* remember frame order */ |
469 | order = frame->buddy_order; |
466 | order = frame->buddy_order; |
470 | 467 | ||
471 | ASSERT(frame->refcount); |
468 | ASSERT(frame->refcount); |
472 | 469 | ||
473 | if (!--frame->refcount) { |
470 | if (!--frame->refcount) { |
474 | buddy_system_free(zone->buddy_system, &frame->buddy_link); |
471 | buddy_system_free(zone->buddy_system, &frame->buddy_link); |
475 | } |
472 | } |
476 | 473 | ||
477 | /* Update zone information. */ |
474 | /* Update zone information. */ |
478 | zone->free_count += (1 << order); |
475 | zone->free_count += (1 << order); |
479 | zone->busy_count -= (1 << order); |
476 | zone->busy_count -= (1 << order); |
480 | } |
477 | } |
481 | 478 | ||
482 | /** Return frame from zone */ |
479 | /** Return frame from zone */ |
483 | static frame_t * zone_get_frame(zone_t *zone, index_t frame_idx) |
480 | static frame_t * zone_get_frame(zone_t *zone, index_t frame_idx) |
484 | { |
481 | { |
485 | ASSERT(frame_idx < zone->count); |
482 | ASSERT(frame_idx < zone->count); |
486 | return &zone->frames[frame_idx]; |
483 | return &zone->frames[frame_idx]; |
487 | } |
484 | } |
488 | 485 | ||
489 | /** Mark frame in zone unavailable to allocation */ |
486 | /** Mark frame in zone unavailable to allocation */ |
490 | static void zone_mark_unavailable(zone_t *zone, index_t frame_idx) |
487 | static void zone_mark_unavailable(zone_t *zone, index_t frame_idx) |
491 | { |
488 | { |
492 | frame_t *frame; |
489 | frame_t *frame; |
493 | link_t *link; |
490 | link_t *link; |
494 | 491 | ||
495 | frame = zone_get_frame(zone, frame_idx); |
492 | frame = zone_get_frame(zone, frame_idx); |
496 | if (frame->refcount) |
493 | if (frame->refcount) |
497 | return; |
494 | return; |
498 | link = buddy_system_alloc_block(zone->buddy_system, |
495 | link = buddy_system_alloc_block(zone->buddy_system, |
499 | &frame->buddy_link); |
496 | &frame->buddy_link); |
500 | ASSERT(link); |
497 | ASSERT(link); |
501 | zone->free_count--; |
498 | zone->free_count--; |
502 | } |
499 | } |
503 | 500 | ||
504 | /** |
501 | /** |
505 | * Join 2 zones |
502 | * Join 2 zones |
506 | * |
503 | * |
507 | * Expect zone_t *z to point to space at least zone_conf_size large |
504 | * Expect zone_t *z to point to space at least zone_conf_size large |
508 | * |
505 | * |
509 | * Assume z1 & z2 are locked |
506 | * Assume z1 & z2 are locked |
510 | */ |
507 | */ |
511 | 508 | ||
512 | static void _zone_merge(zone_t *z, zone_t *z1, zone_t *z2) |
509 | static void _zone_merge(zone_t *z, zone_t *z1, zone_t *z2) |
513 | { |
510 | { |
514 | __u8 max_order; |
511 | __u8 max_order; |
515 | int i, z2idx; |
512 | int i, z2idx; |
516 | pfn_t frame_idx; |
513 | pfn_t frame_idx; |
517 | frame_t *frame; |
514 | frame_t *frame; |
518 | 515 | ||
519 | ASSERT(!overlaps(z1->base,z1->count,z2->base,z2->count)); |
516 | ASSERT(!overlaps(z1->base,z1->count,z2->base,z2->count)); |
520 | ASSERT(z1->base < z2->base); |
517 | ASSERT(z1->base < z2->base); |
521 | 518 | ||
522 | spinlock_initialize(&z->lock, "zone_lock"); |
519 | spinlock_initialize(&z->lock, "zone_lock"); |
523 | z->base = z1->base; |
520 | z->base = z1->base; |
524 | z->count = z2->base+z2->count - z1->base; |
521 | z->count = z2->base+z2->count - z1->base; |
525 | z->flags = z1->flags & z2->flags; |
522 | z->flags = z1->flags & z2->flags; |
526 | 523 | ||
527 | z->free_count = z1->free_count + z2->free_count; |
524 | z->free_count = z1->free_count + z2->free_count; |
528 | z->busy_count = z1->busy_count + z2->busy_count; |
525 | z->busy_count = z1->busy_count + z2->busy_count; |
529 | 526 | ||
530 | max_order = fnzb(z->count); |
527 | max_order = fnzb(z->count); |
531 | 528 | ||
532 | z->buddy_system = (buddy_system_t *)&z[1]; |
529 | z->buddy_system = (buddy_system_t *)&z[1]; |
533 | buddy_system_create(z->buddy_system, max_order, |
530 | buddy_system_create(z->buddy_system, max_order, |
534 | &zone_buddy_system_operations, |
531 | &zone_buddy_system_operations, |
535 | (void *) z); |
532 | (void *) z); |
536 | 533 | ||
537 | z->frames = (frame_t *)((void *)z->buddy_system+buddy_conf_size(max_order)); |
534 | z->frames = (frame_t *)((void *)z->buddy_system+buddy_conf_size(max_order)); |
538 | for (i = 0; i < z->count; i++) { |
535 | for (i = 0; i < z->count; i++) { |
539 | /* This marks all frames busy */ |
536 | /* This marks all frames busy */ |
540 | frame_initialize(&z->frames[i]); |
537 | frame_initialize(&z->frames[i]); |
541 | } |
538 | } |
542 | /* Copy frames from both zones to preserve full frame orders, |
539 | /* Copy frames from both zones to preserve full frame orders, |
543 | * parents etc. Set all frames with refcount=0 to 1, because |
540 | * parents etc. Set all frames with refcount=0 to 1, because |
544 | * we add all free frames to buddy allocator later again, clear |
541 | * we add all free frames to buddy allocator later again, clear |
545 | * order to 0. |
542 | * order to 0. |
546 | */ |
543 | */ |
547 | for (i=0; i<z1->count; i++) |
544 | for (i=0; i<z1->count; i++) |
548 | z->frames[i] = z1->frames[i]; |
545 | z->frames[i] = z1->frames[i]; |
549 | for (i=0; i < z2->count; i++) { |
546 | for (i=0; i < z2->count; i++) { |
550 | z2idx = i + (z2->base - z1->base); |
547 | z2idx = i + (z2->base - z1->base); |
551 | z->frames[z2idx] = z2->frames[i]; |
548 | z->frames[z2idx] = z2->frames[i]; |
552 | } |
549 | } |
553 | for (i=0; i < z->count; i++) { |
550 | for (i=0; i < z->count; i++) { |
554 | if (!z->frames[i].refcount) { |
551 | if (!z->frames[i].refcount) { |
555 | z->frames[i].refcount = 1; |
552 | z->frames[i].refcount = 1; |
556 | z->frames[i].buddy_order = 0; |
553 | z->frames[i].buddy_order = 0; |
557 | } |
554 | } |
558 | } |
555 | } |
559 | /* Add free blocks from the 2 original zones */ |
556 | /* Add free blocks from the 2 original zones */ |
560 | while (zone_can_alloc(z1, 0)) { |
557 | while (zone_can_alloc(z1, 0)) { |
561 | frame_idx = zone_frame_alloc(z1, 0); |
558 | frame_idx = zone_frame_alloc(z1, 0); |
562 | frame = &z->frames[frame_idx]; |
559 | frame = &z->frames[frame_idx]; |
563 | frame->refcount = 0; |
560 | frame->refcount = 0; |
564 | buddy_system_free(z->buddy_system, &frame->buddy_link); |
561 | buddy_system_free(z->buddy_system, &frame->buddy_link); |
565 | } |
562 | } |
566 | while (zone_can_alloc(z2, 0)) { |
563 | while (zone_can_alloc(z2, 0)) { |
567 | frame_idx = zone_frame_alloc(z2, 0); |
564 | frame_idx = zone_frame_alloc(z2, 0); |
568 | frame = &z->frames[frame_idx + (z2->base-z1->base)]; |
565 | frame = &z->frames[frame_idx + (z2->base-z1->base)]; |
569 | frame->refcount = 0; |
566 | frame->refcount = 0; |
570 | buddy_system_free(z->buddy_system, &frame->buddy_link); |
567 | buddy_system_free(z->buddy_system, &frame->buddy_link); |
571 | } |
568 | } |
572 | } |
569 | } |
573 | 570 | ||
574 | /** Return old configuration frames into the zone |
571 | /** Return old configuration frames into the zone |
575 | * |
572 | * |
576 | * We have several cases |
573 | * We have several cases |
577 | * - the conf. data is outside of zone -> exit, shall we call frame_free?? |
574 | * - the conf. data is outside of zone -> exit, shall we call frame_free?? |
578 | * - the conf. data was created by zone_create or |
575 | * - the conf. data was created by zone_create or |
579 | * updated with reduce_region -> free every frame |
576 | * updated with reduce_region -> free every frame |
580 | * |
577 | * |
581 | * @param newzone The actual zone where freeing should occur |
578 | * @param newzone The actual zone where freeing should occur |
582 | * @param oldzone Pointer to old zone configuration data that should |
579 | * @param oldzone Pointer to old zone configuration data that should |
583 | * be freed from new zone |
580 | * be freed from new zone |
584 | */ |
581 | */ |
585 | static void return_config_frames(zone_t *newzone, zone_t *oldzone) |
582 | static void return_config_frames(zone_t *newzone, zone_t *oldzone) |
586 | { |
583 | { |
587 | pfn_t pfn; |
584 | pfn_t pfn; |
588 | frame_t *frame; |
585 | frame_t *frame; |
589 | count_t cframes; |
586 | count_t cframes; |
590 | int i; |
587 | int i; |
591 | 588 | ||
592 | pfn = ADDR2PFN((__address)KA2PA(oldzone)); |
589 | pfn = ADDR2PFN((__address)KA2PA(oldzone)); |
593 | cframes = SIZE2FRAMES(zone_conf_size(oldzone->count)); |
590 | cframes = SIZE2FRAMES(zone_conf_size(oldzone->count)); |
594 | 591 | ||
595 | if (pfn < newzone->base || pfn >= newzone->base + newzone->count) |
592 | if (pfn < newzone->base || pfn >= newzone->base + newzone->count) |
596 | return; |
593 | return; |
597 | 594 | ||
598 | frame = &newzone->frames[pfn - newzone->base]; |
595 | frame = &newzone->frames[pfn - newzone->base]; |
599 | ASSERT(!frame->buddy_order); |
596 | ASSERT(!frame->buddy_order); |
600 | 597 | ||
601 | for (i=0; i < cframes; i++) { |
598 | for (i=0; i < cframes; i++) { |
602 | newzone->busy_count++; |
599 | newzone->busy_count++; |
603 | zone_frame_free(newzone, pfn+i-newzone->base); |
600 | zone_frame_free(newzone, pfn+i-newzone->base); |
604 | } |
601 | } |
605 | } |
602 | } |
606 | 603 | ||
607 | 604 | ||
608 | /** Reduce allocated block to count of order 0 frames |
605 | /** Reduce allocated block to count of order 0 frames |
609 | * |
606 | * |
610 | * The allocated block need 2^order frames of space. Reduce all frames |
607 | * The allocated block need 2^order frames of space. Reduce all frames |
611 | * in block to order 0 and free the unneded frames. This means, that |
608 | * in block to order 0 and free the unneded frames. This means, that |
612 | * when freeing the block, you have to free every frame from block. |
609 | * when freeing the block, you have to free every frame from block. |
613 | * |
610 | * |
614 | * @param zone |
611 | * @param zone |
615 | * @param frame_idx Index to block |
612 | * @param frame_idx Index to block |
616 | * @param count Allocated space in block |
613 | * @param count Allocated space in block |
617 | */ |
614 | */ |
618 | static void zone_reduce_region(zone_t *zone, pfn_t frame_idx, count_t count) |
615 | static void zone_reduce_region(zone_t *zone, pfn_t frame_idx, count_t count) |
619 | { |
616 | { |
620 | count_t i; |
617 | count_t i; |
621 | __u8 order; |
618 | __u8 order; |
622 | frame_t *frame; |
619 | frame_t *frame; |
623 | 620 | ||
624 | ASSERT(frame_idx+count < zone->count); |
621 | ASSERT(frame_idx+count < zone->count); |
625 | 622 | ||
626 | order = zone->frames[frame_idx].buddy_order; |
623 | order = zone->frames[frame_idx].buddy_order; |
627 | ASSERT((1 << order) >= count); |
624 | ASSERT((1 << order) >= count); |
628 | 625 | ||
629 | /* Reduce all blocks to order 0 */ |
626 | /* Reduce all blocks to order 0 */ |
630 | for (i=0; i < (1 << order); i++) { |
627 | for (i=0; i < (1 << order); i++) { |
631 | frame = &zone->frames[i + frame_idx]; |
628 | frame = &zone->frames[i + frame_idx]; |
632 | frame->buddy_order = 0; |
629 | frame->buddy_order = 0; |
633 | if (! frame->refcount) |
630 | if (! frame->refcount) |
634 | frame->refcount = 1; |
631 | frame->refcount = 1; |
635 | ASSERT(frame->refcount == 1); |
632 | ASSERT(frame->refcount == 1); |
636 | } |
633 | } |
637 | /* Free unneeded frames */ |
634 | /* Free unneeded frames */ |
638 | for (i=count; i < (1 << order); i++) { |
635 | for (i=count; i < (1 << order); i++) { |
639 | zone_frame_free(zone, i + frame_idx); |
636 | zone_frame_free(zone, i + frame_idx); |
640 | } |
637 | } |
641 | } |
638 | } |
642 | 639 | ||
643 | /** Merge zones z1 and z2 |
640 | /** Merge zones z1 and z2 |
644 | * |
641 | * |
645 | * - the zones must be 2 zones with no zone existing in between, |
642 | * - the zones must be 2 zones with no zone existing in between, |
646 | * which means that z2 = z1+1 |
643 | * which means that z2 = z1+1 |
647 | * |
644 | * |
648 | * - When you create a new zone, the frame allocator configuration does |
645 | * - When you create a new zone, the frame allocator configuration does |
649 | * not to be 2^order size. Once the allocator is running it is no longer |
646 | * not to be 2^order size. Once the allocator is running it is no longer |
650 | * possible, merged configuration data occupies more space :-/ |
647 | * possible, merged configuration data occupies more space :-/ |
651 | */ |
648 | */ |
652 | void zone_merge(int z1, int z2) |
649 | void zone_merge(int z1, int z2) |
653 | { |
650 | { |
654 | ipl_t ipl; |
651 | ipl_t ipl; |
655 | zone_t *zone1, *zone2, *newzone; |
652 | zone_t *zone1, *zone2, *newzone; |
656 | int cframes; |
653 | int cframes; |
657 | __u8 order; |
654 | __u8 order; |
658 | int i; |
655 | int i; |
659 | pfn_t pfn; |
656 | pfn_t pfn; |
660 | 657 | ||
661 | ipl = interrupts_disable(); |
658 | ipl = interrupts_disable(); |
662 | spinlock_lock(&zones.lock); |
659 | spinlock_lock(&zones.lock); |
663 | 660 | ||
664 | if (z1 < 0 || z1 >= zones.count || z2 < 0 || z2 >= zones.count) |
661 | if (z1 < 0 || z1 >= zones.count || z2 < 0 || z2 >= zones.count) |
665 | goto errout; |
662 | goto errout; |
666 | /* We can join only 2 zones with none existing inbetween */ |
663 | /* We can join only 2 zones with none existing inbetween */ |
667 | if (z2-z1 != 1) |
664 | if (z2-z1 != 1) |
668 | goto errout; |
665 | goto errout; |
669 | 666 | ||
670 | zone1 = zones.info[z1]; |
667 | zone1 = zones.info[z1]; |
671 | zone2 = zones.info[z2]; |
668 | zone2 = zones.info[z2]; |
672 | spinlock_lock(&zone1->lock); |
669 | spinlock_lock(&zone1->lock); |
673 | spinlock_lock(&zone2->lock); |
670 | spinlock_lock(&zone2->lock); |
674 | 671 | ||
675 | cframes = SIZE2FRAMES(zone_conf_size(zone2->base+zone2->count-zone1->base)); |
672 | cframes = SIZE2FRAMES(zone_conf_size(zone2->base+zone2->count-zone1->base)); |
676 | order = fnzb(cframes) + 1; |
673 | order = fnzb(cframes) + 1; |
677 | 674 | ||
678 | /* Allocate zonedata inside one of the zones */ |
675 | /* Allocate zonedata inside one of the zones */ |
679 | if (zone_can_alloc(zone1, order)) |
676 | if (zone_can_alloc(zone1, order)) |
680 | pfn = zone1->base + zone_frame_alloc(zone1, order); |
677 | pfn = zone1->base + zone_frame_alloc(zone1, order); |
681 | else if (zone_can_alloc(zone2, order)) |
678 | else if (zone_can_alloc(zone2, order)) |
682 | pfn = zone2->base + zone_frame_alloc(zone2, order); |
679 | pfn = zone2->base + zone_frame_alloc(zone2, order); |
683 | else |
680 | else |
684 | goto errout2; |
681 | goto errout2; |
685 | 682 | ||
686 | newzone = (zone_t *)PA2KA(PFN2ADDR(pfn)); |
683 | newzone = (zone_t *)PA2KA(PFN2ADDR(pfn)); |
687 | 684 | ||
688 | _zone_merge(newzone, zone1, zone2); |
685 | _zone_merge(newzone, zone1, zone2); |
689 | 686 | ||
690 | /* Free unneeded config frames */ |
687 | /* Free unneeded config frames */ |
691 | zone_reduce_region(newzone, pfn - newzone->base, cframes); |
688 | zone_reduce_region(newzone, pfn - newzone->base, cframes); |
692 | /* Subtract zone information from busy frames */ |
689 | /* Subtract zone information from busy frames */ |
693 | newzone->busy_count -= cframes; |
690 | newzone->busy_count -= cframes; |
694 | 691 | ||
695 | /* Replace existing zones in zoneinfo list */ |
692 | /* Replace existing zones in zoneinfo list */ |
696 | zones.info[z1] = newzone; |
693 | zones.info[z1] = newzone; |
697 | for (i=z2+1;i < zones.count;i++) |
694 | for (i=z2+1;i < zones.count;i++) |
698 | zones.info[i-1] = zones.info[i]; |
695 | zones.info[i-1] = zones.info[i]; |
699 | zones.count--; |
696 | zones.count--; |
700 | 697 | ||
701 | /* Free old zone information */ |
698 | /* Free old zone information */ |
702 | return_config_frames(newzone, zone1); |
699 | return_config_frames(newzone, zone1); |
703 | return_config_frames(newzone, zone2); |
700 | return_config_frames(newzone, zone2); |
704 | errout2: |
701 | errout2: |
705 | /* Nobody is allowed to enter to zone, so we are safe |
702 | /* Nobody is allowed to enter to zone, so we are safe |
706 | * to touch the spinlocks last time */ |
703 | * to touch the spinlocks last time */ |
707 | spinlock_unlock(&zone1->lock); |
704 | spinlock_unlock(&zone1->lock); |
708 | spinlock_unlock(&zone2->lock); |
705 | spinlock_unlock(&zone2->lock); |
709 | errout: |
706 | errout: |
710 | spinlock_unlock(&zones.lock); |
707 | spinlock_unlock(&zones.lock); |
711 | interrupts_restore(ipl); |
708 | interrupts_restore(ipl); |
712 | } |
709 | } |
713 | 710 | ||
714 | 711 | ||
715 | /** |
712 | /** |
716 | * Merge all zones into one big zone |
713 | * Merge all zones into one big zone |
717 | * |
714 | * |
718 | * It is reasonable to do this on systems whose bios reports parts in chunks, |
715 | * It is reasonable to do this on systems whose bios reports parts in chunks, |
719 | * so that we could have 1 zone (it's faster). |
716 | * so that we could have 1 zone (it's faster). |
720 | */ |
717 | */ |
721 | void zone_merge_all(void) |
718 | void zone_merge_all(void) |
722 | { |
719 | { |
723 | int count = zones.count; |
720 | int count = zones.count; |
724 | 721 | ||
725 | while (zones.count > 1 && --count) { |
722 | while (zones.count > 1 && --count) { |
726 | zone_merge(0,1); |
723 | zone_merge(0,1); |
727 | break; |
724 | break; |
728 | } |
725 | } |
729 | } |
726 | } |
730 | 727 | ||
731 | /** Create frame zone |
728 | /** Create frame zone |
732 | * |
729 | * |
733 | * Create new frame zone. |
730 | * Create new frame zone. |
734 | * |
731 | * |
735 | * @param start Physical address of the first frame within the zone. |
732 | * @param start Physical address of the first frame within the zone. |
736 | * @param size Size of the zone. Must be a multiple of FRAME_SIZE. |
733 | * @param size Size of the zone. Must be a multiple of FRAME_SIZE. |
737 | * @param conffram Address of configuration frame |
734 | * @param conffram Address of configuration frame |
738 | * @param flags Zone flags. |
735 | * @param flags Zone flags. |
739 | * |
736 | * |
740 | * @return Initialized zone. |
737 | * @return Initialized zone. |
741 | */ |
738 | */ |
742 | static void zone_construct(pfn_t start, count_t count, zone_t *z, int flags) |
739 | static void zone_construct(pfn_t start, count_t count, zone_t *z, int flags) |
743 | { |
740 | { |
744 | int i; |
741 | int i; |
745 | __u8 max_order; |
742 | __u8 max_order; |
746 | 743 | ||
747 | spinlock_initialize(&z->lock, "zone_lock"); |
744 | spinlock_initialize(&z->lock, "zone_lock"); |
748 | z->base = start; |
745 | z->base = start; |
749 | z->count = count; |
746 | z->count = count; |
750 | z->flags = flags; |
747 | z->flags = flags; |
751 | z->free_count = count; |
748 | z->free_count = count; |
752 | z->busy_count = 0; |
749 | z->busy_count = 0; |
753 | 750 | ||
754 | /* |
751 | /* |
755 | * Compute order for buddy system, initialize |
752 | * Compute order for buddy system, initialize |
756 | */ |
753 | */ |
757 | max_order = fnzb(count); |
754 | max_order = fnzb(count); |
758 | z->buddy_system = (buddy_system_t *)&z[1]; |
755 | z->buddy_system = (buddy_system_t *)&z[1]; |
759 | 756 | ||
760 | buddy_system_create(z->buddy_system, max_order, |
757 | buddy_system_create(z->buddy_system, max_order, |
761 | &zone_buddy_system_operations, |
758 | &zone_buddy_system_operations, |
762 | (void *) z); |
759 | (void *) z); |
763 | 760 | ||
764 | /* Allocate frames _after_ the conframe */ |
761 | /* Allocate frames _after_ the conframe */ |
765 | /* Check sizes */ |
762 | /* Check sizes */ |
766 | z->frames = (frame_t *)((void *)z->buddy_system+buddy_conf_size(max_order)); |
763 | z->frames = (frame_t *)((void *)z->buddy_system+buddy_conf_size(max_order)); |
767 | for (i = 0; i<count; i++) { |
764 | for (i = 0; i<count; i++) { |
768 | frame_initialize(&z->frames[i]); |
765 | frame_initialize(&z->frames[i]); |
769 | } |
766 | } |
770 | 767 | ||
771 | /* Stuffing frames */ |
768 | /* Stuffing frames */ |
772 | for (i = 0; i < count; i++) { |
769 | for (i = 0; i < count; i++) { |
773 | z->frames[i].refcount = 0; |
770 | z->frames[i].refcount = 0; |
774 | buddy_system_free(z->buddy_system, &z->frames[i].buddy_link); |
771 | buddy_system_free(z->buddy_system, &z->frames[i].buddy_link); |
775 | } |
772 | } |
776 | } |
773 | } |
777 | 774 | ||
778 | 775 | ||
779 | /** Compute configuration data size for zone */ |
776 | /** Compute configuration data size for zone */ |
780 | __address zone_conf_size(count_t count) |
777 | __address zone_conf_size(count_t count) |
781 | { |
778 | { |
782 | int size = sizeof(zone_t) + count*sizeof(frame_t); |
779 | int size = sizeof(zone_t) + count*sizeof(frame_t); |
783 | int max_order; |
780 | int max_order; |
784 | 781 | ||
785 | max_order = fnzb(count); |
782 | max_order = fnzb(count); |
786 | size += buddy_conf_size(max_order); |
783 | size += buddy_conf_size(max_order); |
787 | return size; |
784 | return size; |
788 | } |
785 | } |
789 | 786 | ||
790 | 787 | ||
791 | /** Create and add zone to system |
788 | /** Create and add zone to system |
792 | * |
789 | * |
793 | * @param confframe Where configuration frame is supposed to be. |
790 | * @param confframe Where configuration frame is supposed to be. |
794 | * Always check, that we will not disturb the kernel and possibly init. |
791 | * Always check, that we will not disturb the kernel and possibly init. |
795 | * If confframe is given _outside_ this zone, it is expected, |
792 | * If confframe is given _outside_ this zone, it is expected, |
796 | * that the area is already marked BUSY and big enough |
793 | * that the area is already marked BUSY and big enough |
797 | * to contain zone_conf_size() amount of data |
794 | * to contain zone_conf_size() amount of data |
798 | * |
795 | * |
799 | * @return Zone number or -1 on error |
796 | * @return Zone number or -1 on error |
800 | */ |
797 | */ |
801 | int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags) |
798 | int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags) |
802 | { |
799 | { |
803 | zone_t *z; |
800 | zone_t *z; |
804 | __address addr; |
801 | __address addr; |
805 | count_t confcount; |
802 | count_t confcount; |
806 | int i; |
803 | int i; |
807 | int znum; |
804 | int znum; |
808 | 805 | ||
809 | /* Theoretically we could have here 0, practically make sure |
806 | /* Theoretically we could have here 0, practically make sure |
810 | * nobody tries to do that. If some platform requires, remove |
807 | * nobody tries to do that. If some platform requires, remove |
811 | * the assert |
808 | * the assert |
812 | */ |
809 | */ |
813 | ASSERT(confframe); |
810 | ASSERT(confframe); |
814 | /* If conframe is supposed to be inside our zone, then make sure |
811 | /* If conframe is supposed to be inside our zone, then make sure |
815 | * it does not span kernel & init |
812 | * it does not span kernel & init |
816 | */ |
813 | */ |
817 | confcount = SIZE2FRAMES(zone_conf_size(count)); |
814 | confcount = SIZE2FRAMES(zone_conf_size(count)); |
818 | if (confframe >= start && confframe < start+count) { |
815 | if (confframe >= start && confframe < start+count) { |
819 | for (;confframe < start+count;confframe++) { |
816 | for (;confframe < start+count;confframe++) { |
820 | addr = PFN2ADDR(confframe); |
817 | addr = PFN2ADDR(confframe); |
821 | if (overlaps(addr, PFN2ADDR(confcount), |
818 | if (overlaps(addr, PFN2ADDR(confcount), |
822 | KA2PA(config.base),config.kernel_size)) |
819 | KA2PA(config.base),config.kernel_size)) |
823 | continue; |
820 | continue; |
824 | if (config.init_addr) |
821 | if (config.init_addr) |
825 | if (overlaps(addr,PFN2ADDR(confcount), |
822 | if (overlaps(addr,PFN2ADDR(confcount), |
826 | KA2PA(config.init_addr), |
823 | KA2PA(config.init_addr), |
827 | config.init_size)) |
824 | config.init_size)) |
828 | continue; |
825 | continue; |
829 | break; |
826 | break; |
830 | } |
827 | } |
831 | if (confframe >= start+count) |
828 | if (confframe >= start+count) |
832 | panic("Cannot find configuration data for zone."); |
829 | panic("Cannot find configuration data for zone."); |
833 | } |
830 | } |
834 | 831 | ||
835 | z = (zone_t *)PA2KA(PFN2ADDR(confframe)); |
832 | z = (zone_t *)PA2KA(PFN2ADDR(confframe)); |
836 | zone_construct(start, count, z, flags); |
833 | zone_construct(start, count, z, flags); |
837 | znum = zones_add_zone(z); |
834 | znum = zones_add_zone(z); |
838 | if (znum == -1) |
835 | if (znum == -1) |
839 | return -1; |
836 | return -1; |
840 | 837 | ||
841 | /* If confdata in zone, mark as unavailable */ |
838 | /* If confdata in zone, mark as unavailable */ |
842 | if (confframe >= start && confframe < start+count) |
839 | if (confframe >= start && confframe < start+count) |
843 | for (i=confframe; i<confframe+confcount; i++) { |
840 | for (i=confframe; i<confframe+confcount; i++) { |
844 | zone_mark_unavailable(z, i - z->base); |
841 | zone_mark_unavailable(z, i - z->base); |
845 | } |
842 | } |
846 | - | ||
847 | return znum; |
843 | return znum; |
848 | } |
844 | } |
849 | 845 | ||
850 | /***************************************/ |
846 | /***************************************/ |
851 | /* Frame functions */ |
847 | /* Frame functions */ |
852 | 848 | ||
853 | /** Set parent of frame */ |
849 | /** Set parent of frame */ |
854 | void frame_set_parent(pfn_t pfn, void *data, int hint) |
850 | void frame_set_parent(pfn_t pfn, void *data, int hint) |
855 | { |
851 | { |
856 | zone_t *zone = find_zone_and_lock(pfn, &hint); |
852 | zone_t *zone = find_zone_and_lock(pfn, &hint); |
857 | 853 | ||
858 | ASSERT(zone); |
854 | ASSERT(zone); |
859 | 855 | ||
860 | zone_get_frame(zone, pfn-zone->base)->parent = data; |
856 | zone_get_frame(zone, pfn-zone->base)->parent = data; |
861 | spinlock_unlock(&zone->lock); |
857 | spinlock_unlock(&zone->lock); |
862 | } |
858 | } |
863 | 859 | ||
864 | void * frame_get_parent(pfn_t pfn, int hint) |
860 | void * frame_get_parent(pfn_t pfn, int hint) |
865 | { |
861 | { |
866 | zone_t *zone = find_zone_and_lock(pfn, &hint); |
862 | zone_t *zone = find_zone_and_lock(pfn, &hint); |
867 | void *res; |
863 | void *res; |
868 | 864 | ||
869 | ASSERT(zone); |
865 | ASSERT(zone); |
870 | res = zone_get_frame(zone, pfn - zone->base)->parent; |
866 | res = zone_get_frame(zone, pfn - zone->base)->parent; |
871 | 867 | ||
872 | spinlock_unlock(&zone->lock); |
868 | spinlock_unlock(&zone->lock); |
873 | return res; |
869 | return res; |
874 | } |
870 | } |
875 | 871 | ||
876 | /** Allocate power-of-two frames of physical memory. |
872 | /** Allocate power-of-two frames of physical memory. |
877 | * |
873 | * |
878 | * @param flags Flags for host zone selection and address processing. |
874 | * @param flags Flags for host zone selection and address processing. |
879 | * @param order Allocate exactly 2^order frames. |
875 | * @param order Allocate exactly 2^order frames. |
880 | * @param pzone Preferred zone |
876 | * @param pzone Preferred zone |
881 | * |
877 | * |
882 | * @return Allocated frame. |
878 | * @return Allocated frame. |
883 | */ |
879 | */ |
884 | pfn_t frame_alloc_generic(__u8 order, int flags, int * status, int *pzone) |
880 | pfn_t frame_alloc_generic(__u8 order, int flags, int * status, int *pzone) |
885 | { |
881 | { |
886 | ipl_t ipl; |
882 | ipl_t ipl; |
887 | int freed; |
883 | int freed; |
888 | pfn_t v; |
884 | pfn_t v; |
889 | zone_t *zone; |
885 | zone_t *zone; |
890 | 886 | ||
891 | loop: |
887 | loop: |
892 | ipl = interrupts_disable(); |
888 | ipl = interrupts_disable(); |
893 | /* |
889 | /* |
894 | * First, find suitable frame zone. |
890 | * First, find suitable frame zone. |
895 | */ |
891 | */ |
896 | zone = find_free_zone_lock(order,pzone); |
892 | zone = find_free_zone_lock(order,pzone); |
897 | /* If no memory, reclaim some slab memory, |
893 | /* If no memory, reclaim some slab memory, |
898 | if it does not help, reclaim all */ |
894 | if it does not help, reclaim all */ |
899 | if (!zone && !(flags & FRAME_NO_RECLAIM)) { |
895 | if (!zone && !(flags & FRAME_NO_RECLAIM)) { |
900 | freed = slab_reclaim(0); |
896 | freed = slab_reclaim(0); |
901 | if (freed) |
897 | if (freed) |
902 | zone = find_free_zone_lock(order,pzone); |
898 | zone = find_free_zone_lock(order,pzone); |
903 | if (!zone) { |
899 | if (!zone) { |
904 | freed = slab_reclaim(SLAB_RECLAIM_ALL); |
900 | freed = slab_reclaim(SLAB_RECLAIM_ALL); |
905 | if (freed) |
901 | if (freed) |
906 | zone = find_free_zone_lock(order,pzone); |
902 | zone = find_free_zone_lock(order,pzone); |
907 | } |
903 | } |
908 | } |
904 | } |
909 | if (!zone) { |
905 | if (!zone) { |
910 | if (flags & FRAME_PANIC) |
906 | if (flags & FRAME_PANIC) |
911 | panic("Can't allocate frame.\n"); |
907 | panic("Can't allocate frame.\n"); |
912 | 908 | ||
913 | /* |
909 | /* |
914 | * TODO: Sleep until frames are available again. |
910 | * TODO: Sleep until frames are available again. |
915 | */ |
911 | */ |
916 | interrupts_restore(ipl); |
912 | interrupts_restore(ipl); |
917 | 913 | ||
918 | if (flags & FRAME_ATOMIC) { |
914 | if (flags & FRAME_ATOMIC) { |
919 | ASSERT(status != NULL); |
915 | ASSERT(status != NULL); |
920 | if (status) |
916 | if (status) |
921 | *status = FRAME_NO_MEMORY; |
917 | *status = FRAME_NO_MEMORY; |
922 | return NULL; |
918 | return NULL; |
923 | } |
919 | } |
924 | 920 | ||
925 | panic("Sleep not implemented.\n"); |
921 | panic("Sleep not implemented.\n"); |
926 | goto loop; |
922 | goto loop; |
927 | } |
923 | } |
928 | v = zone_frame_alloc(zone,order); |
924 | v = zone_frame_alloc(zone,order); |
929 | v += zone->base; |
925 | v += zone->base; |
930 | 926 | ||
931 | spinlock_unlock(&zone->lock); |
927 | spinlock_unlock(&zone->lock); |
932 | interrupts_restore(ipl); |
928 | interrupts_restore(ipl); |
933 | 929 | ||
934 | if (status) |
930 | if (status) |
935 | *status = FRAME_OK; |
931 | *status = FRAME_OK; |
936 | return v; |
932 | return v; |
937 | } |
933 | } |
938 | 934 | ||
939 | /** Free a frame. |
935 | /** Free a frame. |
940 | * |
936 | * |
941 | * Find respective frame structure for supplied addr. |
937 | * Find respective frame structure for supplied addr. |
942 | * Decrement frame reference count. |
938 | * Decrement frame reference count. |
943 | * If it drops to zero, move the frame structure to free list. |
939 | * If it drops to zero, move the frame structure to free list. |
944 | * |
940 | * |
945 | * @param frame Frame no to be freed. |
941 | * @param frame Frame no to be freed. |
946 | */ |
942 | */ |
947 | void frame_free(pfn_t pfn) |
943 | void frame_free(pfn_t pfn) |
948 | { |
944 | { |
949 | ipl_t ipl; |
945 | ipl_t ipl; |
950 | zone_t *zone; |
946 | zone_t *zone; |
951 | 947 | ||
952 | ipl = interrupts_disable(); |
948 | ipl = interrupts_disable(); |
953 | 949 | ||
954 | /* |
950 | /* |
955 | * First, find host frame zone for addr. |
951 | * First, find host frame zone for addr. |
956 | */ |
952 | */ |
957 | zone = find_zone_and_lock(pfn,NULL); |
953 | zone = find_zone_and_lock(pfn,NULL); |
958 | ASSERT(zone); |
954 | ASSERT(zone); |
959 | 955 | ||
960 | zone_frame_free(zone, pfn-zone->base); |
956 | zone_frame_free(zone, pfn-zone->base); |
961 | 957 | ||
962 | spinlock_unlock(&zone->lock); |
958 | spinlock_unlock(&zone->lock); |
963 | interrupts_restore(ipl); |
959 | interrupts_restore(ipl); |
964 | } |
960 | } |
965 | 961 | ||
966 | 962 | ||
967 | 963 | ||
968 | /** Mark given range unavailable in frame zones */ |
964 | /** Mark given range unavailable in frame zones */ |
969 | void frame_mark_unavailable(pfn_t start, count_t count) |
965 | void frame_mark_unavailable(pfn_t start, count_t count) |
970 | { |
966 | { |
971 | int i; |
967 | int i; |
972 | zone_t *zone; |
968 | zone_t *zone; |
973 | int prefzone = 0; |
969 | int prefzone = 0; |
974 | 970 | ||
975 | for (i=0; i < count; i++) { |
971 | for (i=0; i < count; i++) { |
976 | zone = find_zone_and_lock(start+i,&prefzone); |
972 | zone = find_zone_and_lock(start+i,&prefzone); |
977 | if (!zone) /* PFN not found */ |
973 | if (!zone) /* PFN not found */ |
978 | continue; |
974 | continue; |
979 | zone_mark_unavailable(zone, start+i-zone->base); |
975 | zone_mark_unavailable(zone, start+i-zone->base); |
980 | 976 | ||
981 | spinlock_unlock(&zone->lock); |
977 | spinlock_unlock(&zone->lock); |
982 | } |
978 | } |
983 | } |
979 | } |
984 | 980 | ||
985 | /** Initialize physical memory management |
981 | /** Initialize physical memory management |
986 | * |
982 | * |
987 | * Initialize physical memory managemnt. |
983 | * Initialize physical memory managemnt. |
988 | */ |
984 | */ |
989 | void frame_init(void) |
985 | void frame_init(void) |
990 | { |
986 | { |
991 | if (config.cpu_active == 1) { |
987 | if (config.cpu_active == 1) { |
992 | zones.count = 0; |
988 | zones.count = 0; |
993 | spinlock_initialize(&zones.lock,"zones_glob_lock"); |
989 | spinlock_initialize(&zones.lock,"zones_glob_lock"); |
994 | } |
990 | } |
995 | /* Tell the architecture to create some memory */ |
991 | /* Tell the architecture to create some memory */ |
996 | frame_arch_init(); |
992 | frame_arch_init(); |
997 | if (config.cpu_active == 1) { |
993 | if (config.cpu_active == 1) { |
998 | frame_mark_unavailable(ADDR2PFN(KA2PA(config.base)), |
994 | pfn_t firstframe = ADDR2PFN(KA2PA(config.base)); |
999 | SIZE2FRAMES(config.kernel_size)); |
995 | pfn_t lastframe = ADDR2PFN(KA2PA(config.base+config.kernel_size)); |
- | 996 | frame_mark_unavailable(firstframe,lastframe-firstframe+1); |
|
1000 | if (config.init_size > 0) |
997 | if (config.init_size > 0) |
1001 | frame_mark_unavailable(ADDR2PFN(KA2PA(config.init_addr)), |
998 | frame_mark_unavailable(ADDR2PFN(KA2PA(config.init_addr)), |
1002 | SIZE2FRAMES(config.init_size)); |
999 | SIZE2FRAMES(config.init_size)); |
1003 | } |
1000 | } |
1004 | } |
1001 | } |
1005 | 1002 | ||
1006 | 1003 | ||
1007 | 1004 | ||
1008 | /** Prints list of zones |
1005 | /** Prints list of zones |
1009 | * |
1006 | * |
1010 | */ |
1007 | */ |
1011 | void zone_print_list(void) { |
1008 | void zone_print_list(void) { |
1012 | zone_t *zone = NULL; |
1009 | zone_t *zone = NULL; |
1013 | int i; |
1010 | int i; |
1014 | ipl_t ipl; |
1011 | ipl_t ipl; |
1015 | 1012 | ||
1016 | ipl = interrupts_disable(); |
1013 | ipl = interrupts_disable(); |
1017 | spinlock_lock(&zones.lock); |
1014 | spinlock_lock(&zones.lock); |
1018 | printf("# Base address\tFree Frames\tBusy Frames\n"); |
1015 | printf("# Base address\tFree Frames\tBusy Frames\n"); |
1019 | printf(" ------------\t-----------\t-----------\n"); |
1016 | printf(" ------------\t-----------\t-----------\n"); |
1020 | for (i=0;i<zones.count;i++) { |
1017 | for (i=0;i<zones.count;i++) { |
1021 | zone = zones.info[i]; |
1018 | zone = zones.info[i]; |
1022 | spinlock_lock(&zone->lock); |
1019 | spinlock_lock(&zone->lock); |
1023 | printf("%d: %L\t%d\t\t%d\n",i,PFN2ADDR(zone->base), |
1020 | printf("%d: %L\t%d\t\t%d\n",i,PFN2ADDR(zone->base), |
1024 | zone->free_count, zone->busy_count); |
1021 | zone->free_count, zone->busy_count); |
1025 | spinlock_unlock(&zone->lock); |
1022 | spinlock_unlock(&zone->lock); |
1026 | } |
1023 | } |
1027 | spinlock_unlock(&zones.lock); |
1024 | spinlock_unlock(&zones.lock); |
1028 | interrupts_restore(ipl); |
1025 | interrupts_restore(ipl); |
1029 | } |
1026 | } |
1030 | 1027 | ||
1031 | /** Prints zone details |
1028 | /** Prints zone details |
1032 | * |
1029 | * |
1033 | * @param base Zone base address OR zone number |
1030 | * @param base Zone base address OR zone number |
1034 | */ |
1031 | */ |
1035 | void zone_print_one(int num) { |
1032 | void zone_print_one(int num) { |
1036 | zone_t *zone = NULL; |
1033 | zone_t *zone = NULL; |
1037 | ipl_t ipl; |
1034 | ipl_t ipl; |
1038 | int i; |
1035 | int i; |
1039 | 1036 | ||
1040 | ipl = interrupts_disable(); |
1037 | ipl = interrupts_disable(); |
1041 | spinlock_lock(&zones.lock); |
1038 | spinlock_lock(&zones.lock); |
1042 | 1039 | ||
1043 | for (i=0;i < zones.count; i++) { |
1040 | for (i=0;i < zones.count; i++) { |
1044 | if (i == num || PFN2ADDR(zones.info[i]->base) == num) { |
1041 | if (i == num || PFN2ADDR(zones.info[i]->base) == num) { |
1045 | zone = zones.info[i]; |
1042 | zone = zones.info[i]; |
1046 | break; |
1043 | break; |
1047 | } |
1044 | } |
1048 | } |
1045 | } |
1049 | if (!zone) { |
1046 | if (!zone) { |
1050 | printf("Zone not found.\n"); |
1047 | printf("Zone not found.\n"); |
1051 | goto out; |
1048 | goto out; |
1052 | } |
1049 | } |
1053 | 1050 | ||
1054 | spinlock_lock(&zone->lock); |
1051 | spinlock_lock(&zone->lock); |
1055 | printf("Memory zone information\n"); |
1052 | printf("Memory zone information\n"); |
1056 | printf("Zone base address: %P\n", PFN2ADDR(zone->base)); |
1053 | printf("Zone base address: %P\n", PFN2ADDR(zone->base)); |
1057 | printf("Zone size: %d frames (%dK)\n", zone->count, ((zone->count) * FRAME_SIZE) >> 10); |
1054 | printf("Zone size: %d frames (%dK)\n", zone->count, ((zone->count) * FRAME_SIZE) >> 10); |
1058 | printf("Allocated space: %d frames (%dK)\n", zone->busy_count, (zone->busy_count * FRAME_SIZE) >> 10); |
1055 | printf("Allocated space: %d frames (%dK)\n", zone->busy_count, (zone->busy_count * FRAME_SIZE) >> 10); |
1059 | printf("Available space: %d (%dK)\n", zone->free_count, (zone->free_count * FRAME_SIZE) >> 10); |
1056 | printf("Available space: %d (%dK)\n", zone->free_count, (zone->free_count * FRAME_SIZE) >> 10); |
1060 | buddy_system_structure_print(zone->buddy_system, FRAME_SIZE); |
1057 | buddy_system_structure_print(zone->buddy_system, FRAME_SIZE); |
1061 | 1058 | ||
1062 | spinlock_unlock(&zone->lock); |
1059 | spinlock_unlock(&zone->lock); |
1063 | out: |
1060 | out: |
1064 | spinlock_unlock(&zones.lock); |
1061 | spinlock_unlock(&zones.lock); |
1065 | interrupts_restore(ipl); |
1062 | interrupts_restore(ipl); |
1066 | } |
1063 | } |
1067 | 1064 | ||
1068 | 1065 |