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1 jermar 1
/*
564 jermar 2
 * Copyright (C) 2001-2005 Jakub Jermar
3
 * Copyright (C) 2005 Sergey Bondari
1 jermar 4
 * All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 *
10
 * - Redistributions of source code must retain the above copyright
11
 *   notice, this list of conditions and the following disclaimer.
12
 * - Redistributions in binary form must reproduce the above copyright
13
 *   notice, this list of conditions and the following disclaimer in the
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
16
 *   derived from this software without specific prior written permission.
17
 *
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
20
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
27
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
 */
29
 
368 jermar 30
#include <typedefs.h>
1 jermar 31
#include <arch/types.h>
32
#include <mm/heap.h>
33
#include <mm/frame.h>
703 jermar 34
#include <mm/as.h>
1 jermar 35
#include <panic.h>
367 jermar 36
#include <debug.h>
368 jermar 37
#include <list.h>
1 jermar 38
#include <synch/spinlock.h>
115 jermar 39
#include <arch/asm.h>
195 vana 40
#include <arch.h>
533 bondari 41
#include <print.h>
536 bondari 42
#include <align.h>
115 jermar 43
 
623 jermar 44
SPINLOCK_INITIALIZE(zone_head_lock);    /**< this lock protects zone_head list */
624 jermar 45
LIST_INITIALIZE(zone_head);             /**< list of all zones in the system */
367 jermar 46
 
539 jermar 47
/** Blacklist containing non-available areas of memory.
48
 *
49
 * This blacklist is used to exclude frames that cannot be allocated
50
 * (e.g. kernel memory) from available memory map.
51
 */
533 bondari 52
region_t zone_blacklist[ZONE_BLACKLIST_SIZE];
53
count_t zone_blacklist_count = 0;
54
 
479 bondari 55
static struct buddy_system_operations  zone_buddy_system_operations = {
56
    .find_buddy = zone_buddy_find_buddy,
57
    .bisect = zone_buddy_bisect,
58
    .coalesce = zone_buddy_coalesce,
59
    .set_order = zone_buddy_set_order,
60
    .get_order = zone_buddy_get_order,
533 bondari 61
    .mark_busy = zone_buddy_mark_busy,
479 bondari 62
};
63
 
368 jermar 64
/** Initialize physical memory management
65
 *
66
 * Initialize physical memory managemnt.
67
 */
1 jermar 68
void frame_init(void)
69
{
125 jermar 70
    if (config.cpu_active == 1) {
537 jermar 71
        frame_region_not_free(KA2PA(config.base), config.kernel_size);
629 decky 72
        if (config.init_size > 0)
73
            frame_region_not_free(KA2PA(config.init_addr), config.init_size);
1 jermar 74
    }
75
 
76
    frame_arch_init();
77
}
78
 
762 palkovsky 79
/**
80
 * Find AND LOCK zone that can allocate order frames
81
 *
82
 * Assume zone_head_lock is locked.
83
 */
84
static zone_t * find_free_zone(__u8 order)
85
{
86
    link_t *cur;
87
    zone_t *z;
88
 
89
    for (cur = zone_head.next; cur != &zone_head;cur = cur->next) {
90
        z = list_get_instance(cur, zone_t, link);
91
 
92
        spinlock_lock(&z->lock);
93
 
94
        /* Check if the zone has 2^order frames area available  */
95
        if (buddy_system_can_alloc(z->buddy_system, order))
96
            return z;
97
 
98
        spinlock_unlock(&z->lock);
99
    }
100
    return NULL;
101
}
102
 
537 jermar 103
/** Allocate power-of-two frames of physical memory.
368 jermar 104
 *
105
 * @param flags Flags for host zone selection and address processing.
537 jermar 106
 * @param order Allocate exactly 2^order frames.
762 palkovsky 107
 * @param pzone Pointer to preferred zone pointer, on output it changes
108
 *              to the zone that the frame was really allocated to
368 jermar 109
 *
110
 * @return Allocated frame.
1 jermar 111
 */
762 palkovsky 112
__address frame_alloc(int flags, __u8 order, int * status, zone_t **pzone)
1 jermar 113
{
413 jermar 114
    ipl_t ipl;
762 palkovsky 115
    link_t *tmp;
368 jermar 116
    zone_t *zone = NULL;
117
    frame_t *frame = NULL;
118
    __address v;
1 jermar 119
 
120
loop:
413 jermar 121
    ipl = interrupts_disable();
368 jermar 122
    spinlock_lock(&zone_head_lock);
533 bondari 123
 
368 jermar 124
    /*
125
     * First, find suitable frame zone.
126
     */
762 palkovsky 127
    if (pzone && *pzone) {
128
        spinlock_lock(&(*pzone)->lock);
129
        if (!buddy_system_can_alloc((*pzone)->buddy_system, order))
130
            spinlock_unlock(&(*pzone)->lock);
131
        else
132
            zone = *pzone;
1 jermar 133
    }
368 jermar 134
    if (!zone) {
762 palkovsky 135
        zone = find_free_zone(order);
136
        /* If no memory, reclaim some slab memory,
137
           if it does not help, reclaim all */
138
        if (!zone && !(flags & FRAME_NO_RECLAIM))
139
            if (slab_reclaim(0) || slab_reclaim(SLAB_RECLAIM_ALL))
140
                zone = find_free_zone(order);
141
    }
142
 
143
    if (!zone) {
368 jermar 144
        if (flags & FRAME_PANIC)
145
            panic("Can't allocate frame.\n");
146
 
147
        /*
148
         * TODO: Sleep until frames are available again.
149
         */
150
        spinlock_unlock(&zone_head_lock);
413 jermar 151
        interrupts_restore(ipl);
1 jermar 152
 
759 palkovsky 153
        if (flags & FRAME_ATOMIC) {
689 bondari 154
            ASSERT(status != NULL);
155
            *status = FRAME_NO_MEMORY;
156
            return NULL;
157
        }
158
 
368 jermar 159
        panic("Sleep not implemented.\n");
160
        goto loop;
161
    }
1 jermar 162
 
533 bondari 163
    /* Allocate frames from zone buddy system */
539 jermar 164
    tmp = buddy_system_alloc(zone->buddy_system, order);
1 jermar 165
 
539 jermar 166
    ASSERT(tmp);
533 bondari 167
 
539 jermar 168
    /* Update zone information. */
169
    zone->free_count -= (1 << order);
170
    zone->busy_count += (1 << order);
171
 
172
    /* Frame will be actually a first frame of the block. */
173
    frame = list_get_instance(tmp, frame_t, buddy_link);
174
 
533 bondari 175
    /* get frame address */
479 bondari 176
    v = FRAME2ADDR(zone, frame);
533 bondari 177
 
539 jermar 178
    spinlock_unlock(&zone->lock);
179
    spinlock_unlock(&zone_head_lock);
180
    interrupts_restore(ipl);
181
 
735 bondari 182
    ASSERT(v == ALIGN_UP(v, FRAME_SIZE << order));
183
 
368 jermar 184
    if (flags & FRAME_KA)
185
        v = PA2KA(v);
186
 
759 palkovsky 187
    if (flags & FRAME_ATOMIC) {
689 bondari 188
        ASSERT(status != NULL);
189
        *status = FRAME_OK;
190
    }
762 palkovsky 191
    if (pzone)
192
        *pzone = zone;
368 jermar 193
    return v;
1 jermar 194
}
195
 
762 palkovsky 196
/** Convert address to zone pointer
197
 *
198
 * Assume zone_head_lock is held
199
 *
200
 * @param addr Physical address
201
 * @param lock If true, lock the zone
202
 */
203
static zone_t * addr2zone(__address addr, int lock)
204
{
205
    link_t *cur;
206
    zone_t *z = NULL;
207
 
208
    for (cur = zone_head.next; cur != &zone_head; cur = cur->next) {
209
        z = list_get_instance(cur, zone_t, link);
210
 
211
        spinlock_lock(&z->lock);
212
 
213
        /*
214
         * Check if addr belongs to z.
215
         */
216
        if ((addr >= z->base) && (addr <= z->base + (z->free_count + z->busy_count) * FRAME_SIZE)) {
217
            if (!lock)
218
                spinlock_unlock(&z->lock);
219
            return z;
220
        }
221
 
222
        spinlock_unlock(&z->lock);
223
    }
224
 
225
    panic("Cannot find addr2zone: 0x%X", addr);
226
}
227
 
228
/** Return frame_t structure corresponding to address
229
 *
230
 *
231
 */
232
frame_t * frame_addr2frame(__address addr)
233
{
234
    ipl_t ipl;
235
    frame_t *frame;
236
    zone_t *zone;
237
 
238
    if (IS_KA(addr))
239
        addr = KA2PA(addr);
240
 
241
    /* Disable interrupts to avoid deadlocks with interrupt handlers */
242
    ipl = interrupts_disable();
243
    spinlock_lock(&zone_head_lock);
244
 
245
    zone = addr2zone(addr,0);
246
    frame = ADDR2FRAME(zone, addr);
247
 
248
    spinlock_unlock(&zone_head_lock);
249
    interrupts_restore(ipl);
250
 
251
    return frame;
252
}
253
 
254
 
368 jermar 255
/** Free a frame.
256
 *
257
 * Find respective frame structrue for supplied addr.
258
 * Decrement frame reference count.
259
 * If it drops to zero, move the frame structure to free list.
260
 *
261
 * @param addr Address of the frame to be freed. It must be a multiple of FRAME_SIZE.
1 jermar 262
 */
263
void frame_free(__address addr)
264
{
413 jermar 265
    ipl_t ipl;
762 palkovsky 266
    zone_t *zone;
368 jermar 267
    frame_t *frame;
724 palkovsky 268
    int order;
269
 
368 jermar 270
    ASSERT(addr % FRAME_SIZE == 0);
1 jermar 271
 
762 palkovsky 272
    if (IS_KA(addr))
273
        addr = KA2PA(addr);
274
 
413 jermar 275
    ipl = interrupts_disable();
368 jermar 276
    spinlock_lock(&zone_head_lock);
1 jermar 277
 
368 jermar 278
    /*
279
     * First, find host frame zone for addr.
280
     */
762 palkovsky 281
    zone = addr2zone(addr, 1); /* This locks the zone automatically */
1 jermar 282
 
479 bondari 283
    frame = ADDR2FRAME(zone, addr);
724 palkovsky 284
 
285
    /* remember frame order */
286
    order = frame->buddy_order;
533 bondari 287
 
368 jermar 288
    ASSERT(frame->refcount);
289
 
290
    if (!--frame->refcount) {
533 bondari 291
        buddy_system_free(zone->buddy_system, &frame->buddy_link);
368 jermar 292
    }
539 jermar 293
 
294
    /* Update zone information. */
724 palkovsky 295
    zone->free_count += (1 << order);
296
    zone->busy_count -= (1 << order);
368 jermar 297
 
539 jermar 298
    spinlock_unlock(&zone->lock);
368 jermar 299
    spinlock_unlock(&zone_head_lock);
413 jermar 300
    interrupts_restore(ipl);
1 jermar 301
}
302
 
368 jermar 303
/** Mark frame region not free.
304
 *
305
 * Mark frame region not free.
306
 *
537 jermar 307
 * @param base Base address of non-available region.
308
 * @param size Size of non-available region.
368 jermar 309
 */
533 bondari 310
void frame_region_not_free(__address base, size_t size)
1 jermar 311
{
537 jermar 312
    index_t index;
533 bondari 313
    index = zone_blacklist_count++;
537 jermar 314
 
315
    /* Force base to the nearest lower address frame boundary. */
564 jermar 316
    base = ALIGN_DOWN(base, FRAME_SIZE);
537 jermar 317
    /* Align size to frame boundary. */
564 jermar 318
    size = ALIGN_UP(size, FRAME_SIZE);
537 jermar 319
 
564 jermar 320
    ASSERT(index < ZONE_BLACKLIST_SIZE);
533 bondari 321
    zone_blacklist[index].base = base;
322
    zone_blacklist[index].size = size;
1 jermar 323
}
367 jermar 324
 
539 jermar 325
/** Create frame zones in region of available memory.
326
 *
327
 * Avoid any black listed areas of non-available memory.
328
 * Assume that the black listed areas cannot overlap
329
 * one another or cross available memory region boundaries.
330
 *
331
 * @param base Base address of available memory region.
332
 * @param size Size of the region.
333
 */
533 bondari 334
void zone_create_in_region(__address base, size_t size) {
335
    int i;
336
    zone_t * z;
537 jermar 337
    __address s;
338
    size_t sz;
533 bondari 339
 
340
    ASSERT(base % FRAME_SIZE == 0);
341
    ASSERT(size % FRAME_SIZE == 0);
342
 
537 jermar 343
    if (!size)
344
        return;
345
 
533 bondari 346
    for (i = 0; i < zone_blacklist_count; i++) {
347
        if (zone_blacklist[i].base >= base && zone_blacklist[i].base < base + size) {
348
            s = base; sz = zone_blacklist[i].base - base;
349
            ASSERT(base != s || sz != size);
350
            zone_create_in_region(s, sz);
351
 
352
            s = zone_blacklist[i].base + zone_blacklist[i].size;
353
            sz = (base + size) - (zone_blacklist[i].base + zone_blacklist[i].size);
354
            ASSERT(base != s || sz != size);
355
            zone_create_in_region(s, sz);
356
            return;
357
 
358
        }
359
    }
360
 
361
    z = zone_create(base, size, 0);
362
 
363
    if (!z) {
564 jermar 364
        panic("Cannot allocate zone (base=%P, size=%d).\n", base, size);
533 bondari 365
    }
366
 
367
    zone_attach(z);
368
}
369
 
370
 
367 jermar 371
/** Create frame zone
372
 *
373
 * Create new frame zone.
374
 *
375
 * @param start Physical address of the first frame within the zone.
376
 * @param size Size of the zone. Must be a multiple of FRAME_SIZE.
377
 * @param flags Zone flags.
378
 *
379
 * @return Initialized zone.
380
 */
533 bondari 381
zone_t * zone_create(__address start, size_t size, int flags)
367 jermar 382
{
383
    zone_t *z;
384
    count_t cnt;
385
    int i;
479 bondari 386
    __u8 max_order;
533 bondari 387
 
367 jermar 388
    ASSERT(start % FRAME_SIZE == 0);
389
    ASSERT(size % FRAME_SIZE == 0);
390
 
391
    cnt = size / FRAME_SIZE;
392
 
374 jermar 393
    z = (zone_t *) early_malloc(sizeof(zone_t));
367 jermar 394
    if (z) {
395
        link_initialize(&z->link);
552 palkovsky 396
        spinlock_initialize(&z->lock, "zone_lock");
367 jermar 397
 
398
        z->base = start;
724 palkovsky 399
        z->base_index = start / FRAME_SIZE;
400
 
367 jermar 401
        z->flags = flags;
402
 
403
        z->free_count = cnt;
404
        z->busy_count = 0;
405
 
374 jermar 406
        z->frames = (frame_t *) early_malloc(cnt * sizeof(frame_t));
367 jermar 407
        if (!z->frames) {
375 jermar 408
            early_free(z);
367 jermar 409
            return NULL;
410
        }
411
 
412
        for (i = 0; i<cnt; i++) {
413
            frame_initialize(&z->frames[i], z);
414
        }
415
 
479 bondari 416
        /*
417
         * Create buddy system for the zone
418
         */
537 jermar 419
        for (max_order = 0; cnt >> max_order; max_order++)
420
            ;
489 jermar 421
        z->buddy_system = buddy_system_create(max_order, &zone_buddy_system_operations, (void *) z);
533 bondari 422
 
423
        /* Stuffing frames */
424
        for (i = 0; i<cnt; i++) {
425
            z->frames[i].refcount = 0;
426
            buddy_system_free(z->buddy_system, &z->frames[i].buddy_link);  
427
        }
724 palkovsky 428
 
367 jermar 429
    }
430
    return z;
431
}
432
 
433
/** Attach frame zone
434
 *
435
 * Attach frame zone to zone list.
436
 *
437
 * @param zone Zone to be attached.
438
 */
439
void zone_attach(zone_t *zone)
440
{
413 jermar 441
    ipl_t ipl;
367 jermar 442
 
413 jermar 443
    ipl = interrupts_disable();
367 jermar 444
    spinlock_lock(&zone_head_lock);
445
 
446
    list_append(&zone->link, &zone_head);
447
 
448
    spinlock_unlock(&zone_head_lock);
413 jermar 449
    interrupts_restore(ipl);
367 jermar 450
}
451
 
452
/** Initialize frame structure
453
 *
454
 * Initialize frame structure.
455
 *
456
 * @param frame Frame structure to be initialized.
457
 * @param zone Host frame zone.
458
 */
459
void frame_initialize(frame_t *frame, zone_t *zone)
460
{
533 bondari 461
    frame->refcount = 1;
462
    frame->buddy_order = 0;
367 jermar 463
}
479 bondari 464
 
465
 
466
/** Buddy system find_buddy implementation
489 jermar 467
 *
468
 * @param b Buddy system.
480 bondari 469
 * @param block Block for which buddy should be found
479 bondari 470
 *
480 bondari 471
 * @return Buddy for given block if found
479 bondari 472
 */
489 jermar 473
link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * block) {
539 jermar 474
    frame_t * frame;
480 bondari 475
    zone_t * zone;
564 jermar 476
    index_t index;
480 bondari 477
    bool is_left, is_right;
479 bondari 478
 
480 bondari 479
    frame = list_get_instance(block, frame_t, buddy_link);
533 bondari 480
    zone = (zone_t *) b->data;
724 palkovsky 481
    ASSERT(IS_BUDDY_ORDER_OK(FRAME_INDEX_ABS(zone, frame), frame->buddy_order));
480 bondari 482
 
564 jermar 483
 
724 palkovsky 484
    is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame);
485
    is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame);
480 bondari 486
 
564 jermar 487
    ASSERT(is_left ^ is_right);
488
 
533 bondari 489
    if (is_left) {
490
        index = (FRAME_INDEX(zone, frame)) + (1 << frame->buddy_order);
615 palkovsky 491
    } else { // if (is_right)
533 bondari 492
        index = (FRAME_INDEX(zone, frame)) - (1 << frame->buddy_order);
493
    }
494
 
495
    if (FRAME_INDEX_VALID(zone, index)) {
496
        if (    zone->frames[index].buddy_order == frame->buddy_order &&
497
            zone->frames[index].refcount == 0) {
498
            return &zone->frames[index].buddy_link;
480 bondari 499
        }
500
    }
501
 
539 jermar 502
    return NULL;   
479 bondari 503
}
504
 
505
/** Buddy system bisect implementation
506
 *
489 jermar 507
 * @param b Buddy system.
480 bondari 508
 * @param block Block to bisect
509
 *
510
 * @return right block
479 bondari 511
 */
489 jermar 512
link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block) {
480 bondari 513
    frame_t * frame_l, * frame_r;
564 jermar 514
 
480 bondari 515
    frame_l = list_get_instance(block, frame_t, buddy_link);
533 bondari 516
    frame_r = (frame_l + (1 << (frame_l->buddy_order - 1)));
564 jermar 517
 
480 bondari 518
    return &frame_r->buddy_link;
479 bondari 519
}
520
 
521
/** Buddy system coalesce implementation
522
 *
489 jermar 523
 * @param b Buddy system.
480 bondari 524
 * @param block_1 First block
525
 * @param block_2 First block's buddy
526
 *
527
 * @return Coalesced block (actually block that represents lower address)
479 bondari 528
 */
489 jermar 529
link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * block_1, link_t * block_2) {
480 bondari 530
    frame_t * frame1, * frame2;
564 jermar 531
 
480 bondari 532
    frame1 = list_get_instance(block_1, frame_t, buddy_link);
533
    frame2 = list_get_instance(block_2, frame_t, buddy_link);
564 jermar 534
 
533 bondari 535
    return frame1 < frame2 ? block_1 : block_2;
479 bondari 536
}
537
 
538
/** Buddy system set_order implementation
489 jermar 539
 *
540
 * @param b Buddy system.
480 bondari 541
 * @param block Buddy system block
542
 * @param order Order to set
479 bondari 543
 */
489 jermar 544
void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order) {
480 bondari 545
    frame_t * frame;
546
    frame = list_get_instance(block, frame_t, buddy_link);
547
    frame->buddy_order = order;
479 bondari 548
}
549
 
550
/** Buddy system get_order implementation
489 jermar 551
 *
552
 * @param b Buddy system.
480 bondari 553
 * @param block Buddy system block
479 bondari 554
 *
480 bondari 555
 * @return Order of block
479 bondari 556
 */
489 jermar 557
__u8 zone_buddy_get_order(buddy_system_t *b, link_t * block) {
480 bondari 558
    frame_t * frame;
559
    frame = list_get_instance(block, frame_t, buddy_link);
560
    return frame->buddy_order;
479 bondari 561
}
533 bondari 562
 
563
/** Buddy system mark_busy implementation
564
 *
565
 * @param b Buddy system
566
 * @param block Buddy system block
567
 *
568
 */
569
void zone_buddy_mark_busy(buddy_system_t *b, link_t * block) {
570
    frame_t * frame;
571
    frame = list_get_instance(block, frame_t, buddy_link);
572
    frame->refcount = 1;
573
}
676 bondari 574
 
677 bondari 575
/** Prints list of zones
576
 *
577
 */
676 bondari 578
void zone_print_list(void) {
579
    zone_t *zone = NULL;
580
    link_t *cur;
701 jermar 581
    ipl_t ipl;
582
 
583
    ipl = interrupts_disable();
683 bondari 584
    spinlock_lock(&zone_head_lock);
686 bondari 585
    printf("Base address\tFree Frames\tBusy Frames\n");
586
    printf("------------\t-----------\t-----------\n");
676 bondari 587
    for (cur = zone_head.next; cur != &zone_head; cur = cur->next) {
588
        zone = list_get_instance(cur, zone_t, link);
683 bondari 589
        spinlock_lock(&zone->lock);
686 bondari 590
        printf("%L\t%d\t\t%d\n",zone->base, zone->free_count, zone->busy_count);
701 jermar 591
        spinlock_unlock(&zone->lock);
676 bondari 592
    }
683 bondari 593
    spinlock_unlock(&zone_head_lock);
701 jermar 594
    interrupts_restore(ipl);
676 bondari 595
}
596
 
677 bondari 597
/** Prints zone details
598
 *
683 bondari 599
 * @param base Zone base address
677 bondari 600
 */
683 bondari 601
void zone_print_one(__address base) {
602
    zone_t *zone = NULL, *z ;
676 bondari 603
    link_t *cur;
701 jermar 604
    ipl_t ipl;
605
 
606
    ipl = interrupts_disable();
683 bondari 607
    spinlock_lock(&zone_head_lock);
608
 
676 bondari 609
    for (cur = zone_head.next; cur != &zone_head; cur = cur->next) {
683 bondari 610
        z = list_get_instance(cur, zone_t, link);
611
        if (base == z->base) {
612
            zone = z;
676 bondari 613
            break;
614
        }
615
    }
616
 
617
    if (!zone) {
701 jermar 618
        spinlock_unlock(&zone_head_lock);
619
        interrupts_restore(ipl);
683 bondari 620
        printf("No zone with address %X\n", base);
676 bondari 621
        return;
622
    }
623
 
683 bondari 624
    spinlock_lock(&zone->lock);
625
    printf("Memory zone information\n\n");
676 bondari 626
    printf("Zone base address: %P\n", zone->base);
701 jermar 627
    printf("Zone size: %d frames (%dK)\n", zone->free_count + zone->busy_count, ((zone->free_count + zone->busy_count) * FRAME_SIZE) >> 10);
628
    printf("Allocated space: %d frames (%dK)\n", zone->busy_count, (zone->busy_count * FRAME_SIZE) >> 10);
629
    printf("Available space: %d (%dK)\n", zone->free_count, (zone->free_count * FRAME_SIZE) >> 10);
683 bondari 630
 
631
    printf("\nBuddy allocator structures:\n\n");
686 bondari 632
    buddy_system_structure_print(zone->buddy_system, FRAME_SIZE);
683 bondari 633
 
634
    spinlock_unlock(&zone->lock);
635
    spinlock_unlock(&zone_head_lock);
701 jermar 636
    interrupts_restore(ipl);
676 bondari 637
}
638