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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>
788 jermar 37
#include <adt/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
 */
786 bondari 112
__address frame_alloc_generic(__u8 order, int flags, 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;
768 palkovsky 118
    int freed;
368 jermar 119
    __address v;
1 jermar 120
 
121
loop:
413 jermar 122
    ipl = interrupts_disable();
368 jermar 123
    spinlock_lock(&zone_head_lock);
533 bondari 124
 
368 jermar 125
    /*
126
     * First, find suitable frame zone.
127
     */
762 palkovsky 128
    if (pzone && *pzone) {
129
        spinlock_lock(&(*pzone)->lock);
130
        if (!buddy_system_can_alloc((*pzone)->buddy_system, order))
131
            spinlock_unlock(&(*pzone)->lock);
132
        else
133
            zone = *pzone;
1 jermar 134
    }
368 jermar 135
    if (!zone) {
762 palkovsky 136
        zone = find_free_zone(order);
137
        /* If no memory, reclaim some slab memory,
138
           if it does not help, reclaim all */
768 palkovsky 139
        if (!zone && !(flags & FRAME_NO_RECLAIM)) {
140
            spinlock_unlock(&zone_head_lock);
141
            freed = slab_reclaim(0);
142
            spinlock_lock(&zone_head_lock);
143
            if (freed)
762 palkovsky 144
                zone = find_free_zone(order);
768 palkovsky 145
            if (!zone) {
146
                spinlock_unlock(&zone_head_lock);
147
                freed = slab_reclaim(SLAB_RECLAIM_ALL);
148
                spinlock_lock(&zone_head_lock);
149
                if (freed)
150
                    zone = find_free_zone(order);
151
            }
152
        }
762 palkovsky 153
    }
154
 
155
    if (!zone) {
368 jermar 156
        if (flags & FRAME_PANIC)
157
            panic("Can't allocate frame.\n");
158
 
159
        /*
160
         * TODO: Sleep until frames are available again.
161
         */
162
        spinlock_unlock(&zone_head_lock);
413 jermar 163
        interrupts_restore(ipl);
1 jermar 164
 
759 palkovsky 165
        if (flags & FRAME_ATOMIC) {
689 bondari 166
            ASSERT(status != NULL);
167
            *status = FRAME_NO_MEMORY;
168
            return NULL;
169
        }
170
 
368 jermar 171
        panic("Sleep not implemented.\n");
172
        goto loop;
173
    }
1 jermar 174
 
533 bondari 175
    /* Allocate frames from zone buddy system */
539 jermar 176
    tmp = buddy_system_alloc(zone->buddy_system, order);
1 jermar 177
 
539 jermar 178
    ASSERT(tmp);
533 bondari 179
 
539 jermar 180
    /* Update zone information. */
181
    zone->free_count -= (1 << order);
182
    zone->busy_count += (1 << order);
183
 
184
    /* Frame will be actually a first frame of the block. */
185
    frame = list_get_instance(tmp, frame_t, buddy_link);
186
 
533 bondari 187
    /* get frame address */
479 bondari 188
    v = FRAME2ADDR(zone, frame);
533 bondari 189
 
539 jermar 190
    spinlock_unlock(&zone->lock);
191
    spinlock_unlock(&zone_head_lock);
192
    interrupts_restore(ipl);
193
 
735 bondari 194
    ASSERT(v == ALIGN_UP(v, FRAME_SIZE << order));
195
 
368 jermar 196
    if (flags & FRAME_KA)
197
        v = PA2KA(v);
198
 
764 palkovsky 199
    if (status)
689 bondari 200
        *status = FRAME_OK;
764 palkovsky 201
 
762 palkovsky 202
    if (pzone)
203
        *pzone = zone;
368 jermar 204
    return v;
1 jermar 205
}
206
 
762 palkovsky 207
/** Convert address to zone pointer
208
 *
209
 * Assume zone_head_lock is held
210
 *
211
 * @param addr Physical address
212
 * @param lock If true, lock the zone
213
 */
214
static zone_t * addr2zone(__address addr, int lock)
215
{
216
    link_t *cur;
217
    zone_t *z = NULL;
218
 
219
    for (cur = zone_head.next; cur != &zone_head; cur = cur->next) {
220
        z = list_get_instance(cur, zone_t, link);
221
 
222
        spinlock_lock(&z->lock);
223
 
224
        /*
225
         * Check if addr belongs to z.
226
         */
227
        if ((addr >= z->base) && (addr <= z->base + (z->free_count + z->busy_count) * FRAME_SIZE)) {
228
            if (!lock)
229
                spinlock_unlock(&z->lock);
230
            return z;
231
        }
232
 
233
        spinlock_unlock(&z->lock);
234
    }
235
 
236
    panic("Cannot find addr2zone: 0x%X", addr);
237
}
238
 
239
/** Return frame_t structure corresponding to address
240
 *
241
 *
242
 */
243
frame_t * frame_addr2frame(__address addr)
244
{
245
    ipl_t ipl;
246
    frame_t *frame;
247
    zone_t *zone;
248
 
249
    if (IS_KA(addr))
250
        addr = KA2PA(addr);
251
 
252
    /* Disable interrupts to avoid deadlocks with interrupt handlers */
253
    ipl = interrupts_disable();
254
    spinlock_lock(&zone_head_lock);
255
 
256
    zone = addr2zone(addr,0);
257
    frame = ADDR2FRAME(zone, addr);
258
 
259
    spinlock_unlock(&zone_head_lock);
260
    interrupts_restore(ipl);
261
 
262
    return frame;
263
}
264
 
265
 
368 jermar 266
/** Free a frame.
267
 *
268
 * Find respective frame structrue for supplied addr.
269
 * Decrement frame reference count.
270
 * If it drops to zero, move the frame structure to free list.
271
 *
272
 * @param addr Address of the frame to be freed. It must be a multiple of FRAME_SIZE.
1 jermar 273
 */
274
void frame_free(__address addr)
275
{
413 jermar 276
    ipl_t ipl;
762 palkovsky 277
    zone_t *zone;
368 jermar 278
    frame_t *frame;
724 palkovsky 279
    int order;
280
 
368 jermar 281
    ASSERT(addr % FRAME_SIZE == 0);
1 jermar 282
 
762 palkovsky 283
    if (IS_KA(addr))
284
        addr = KA2PA(addr);
285
 
413 jermar 286
    ipl = interrupts_disable();
368 jermar 287
    spinlock_lock(&zone_head_lock);
1 jermar 288
 
368 jermar 289
    /*
290
     * First, find host frame zone for addr.
291
     */
762 palkovsky 292
    zone = addr2zone(addr, 1); /* This locks the zone automatically */
1 jermar 293
 
479 bondari 294
    frame = ADDR2FRAME(zone, addr);
724 palkovsky 295
 
296
    /* remember frame order */
297
    order = frame->buddy_order;
533 bondari 298
 
368 jermar 299
    ASSERT(frame->refcount);
300
 
301
    if (!--frame->refcount) {
533 bondari 302
        buddy_system_free(zone->buddy_system, &frame->buddy_link);
368 jermar 303
    }
539 jermar 304
 
305
    /* Update zone information. */
724 palkovsky 306
    zone->free_count += (1 << order);
307
    zone->busy_count -= (1 << order);
368 jermar 308
 
539 jermar 309
    spinlock_unlock(&zone->lock);
368 jermar 310
    spinlock_unlock(&zone_head_lock);
413 jermar 311
    interrupts_restore(ipl);
1 jermar 312
}
313
 
368 jermar 314
/** Mark frame region not free.
315
 *
316
 * Mark frame region not free.
317
 *
537 jermar 318
 * @param base Base address of non-available region.
319
 * @param size Size of non-available region.
368 jermar 320
 */
533 bondari 321
void frame_region_not_free(__address base, size_t size)
1 jermar 322
{
537 jermar 323
    index_t index;
533 bondari 324
    index = zone_blacklist_count++;
537 jermar 325
 
326
    /* Force base to the nearest lower address frame boundary. */
564 jermar 327
    base = ALIGN_DOWN(base, FRAME_SIZE);
537 jermar 328
    /* Align size to frame boundary. */
564 jermar 329
    size = ALIGN_UP(size, FRAME_SIZE);
537 jermar 330
 
564 jermar 331
    ASSERT(index < ZONE_BLACKLIST_SIZE);
533 bondari 332
    zone_blacklist[index].base = base;
333
    zone_blacklist[index].size = size;
1 jermar 334
}
367 jermar 335
 
539 jermar 336
/** Create frame zones in region of available memory.
337
 *
338
 * Avoid any black listed areas of non-available memory.
339
 * Assume that the black listed areas cannot overlap
340
 * one another or cross available memory region boundaries.
341
 *
342
 * @param base Base address of available memory region.
343
 * @param size Size of the region.
344
 */
533 bondari 345
void zone_create_in_region(__address base, size_t size) {
346
    int i;
347
    zone_t * z;
537 jermar 348
    __address s;
349
    size_t sz;
533 bondari 350
 
351
    ASSERT(base % FRAME_SIZE == 0);
352
    ASSERT(size % FRAME_SIZE == 0);
353
 
537 jermar 354
    if (!size)
355
        return;
356
 
533 bondari 357
    for (i = 0; i < zone_blacklist_count; i++) {
358
        if (zone_blacklist[i].base >= base && zone_blacklist[i].base < base + size) {
359
            s = base; sz = zone_blacklist[i].base - base;
360
            ASSERT(base != s || sz != size);
361
            zone_create_in_region(s, sz);
362
 
363
            s = zone_blacklist[i].base + zone_blacklist[i].size;
364
            sz = (base + size) - (zone_blacklist[i].base + zone_blacklist[i].size);
365
            ASSERT(base != s || sz != size);
366
            zone_create_in_region(s, sz);
367
            return;
368
 
369
        }
370
    }
371
 
372
    z = zone_create(base, size, 0);
373
 
374
    if (!z) {
564 jermar 375
        panic("Cannot allocate zone (base=%P, size=%d).\n", base, size);
533 bondari 376
    }
377
 
378
    zone_attach(z);
379
}
380
 
381
 
367 jermar 382
/** Create frame zone
383
 *
384
 * Create new frame zone.
385
 *
386
 * @param start Physical address of the first frame within the zone.
387
 * @param size Size of the zone. Must be a multiple of FRAME_SIZE.
388
 * @param flags Zone flags.
389
 *
390
 * @return Initialized zone.
391
 */
533 bondari 392
zone_t * zone_create(__address start, size_t size, int flags)
367 jermar 393
{
394
    zone_t *z;
395
    count_t cnt;
396
    int i;
479 bondari 397
    __u8 max_order;
533 bondari 398
 
367 jermar 399
    ASSERT(start % FRAME_SIZE == 0);
400
    ASSERT(size % FRAME_SIZE == 0);
401
 
402
    cnt = size / FRAME_SIZE;
403
 
374 jermar 404
    z = (zone_t *) early_malloc(sizeof(zone_t));
367 jermar 405
    if (z) {
406
        link_initialize(&z->link);
552 palkovsky 407
        spinlock_initialize(&z->lock, "zone_lock");
367 jermar 408
 
409
        z->base = start;
724 palkovsky 410
        z->base_index = start / FRAME_SIZE;
411
 
367 jermar 412
        z->flags = flags;
413
 
414
        z->free_count = cnt;
415
        z->busy_count = 0;
416
 
374 jermar 417
        z->frames = (frame_t *) early_malloc(cnt * sizeof(frame_t));
367 jermar 418
        if (!z->frames) {
375 jermar 419
            early_free(z);
367 jermar 420
            return NULL;
421
        }
422
 
423
        for (i = 0; i<cnt; i++) {
424
            frame_initialize(&z->frames[i], z);
425
        }
426
 
479 bondari 427
        /*
428
         * Create buddy system for the zone
429
         */
537 jermar 430
        for (max_order = 0; cnt >> max_order; max_order++)
431
            ;
489 jermar 432
        z->buddy_system = buddy_system_create(max_order, &zone_buddy_system_operations, (void *) z);
533 bondari 433
 
434
        /* Stuffing frames */
435
        for (i = 0; i<cnt; i++) {
436
            z->frames[i].refcount = 0;
437
            buddy_system_free(z->buddy_system, &z->frames[i].buddy_link);  
438
        }
724 palkovsky 439
 
367 jermar 440
    }
441
    return z;
442
}
443
 
444
/** Attach frame zone
445
 *
446
 * Attach frame zone to zone list.
447
 *
448
 * @param zone Zone to be attached.
449
 */
450
void zone_attach(zone_t *zone)
451
{
413 jermar 452
    ipl_t ipl;
367 jermar 453
 
413 jermar 454
    ipl = interrupts_disable();
367 jermar 455
    spinlock_lock(&zone_head_lock);
456
 
457
    list_append(&zone->link, &zone_head);
458
 
459
    spinlock_unlock(&zone_head_lock);
413 jermar 460
    interrupts_restore(ipl);
367 jermar 461
}
462
 
463
/** Initialize frame structure
464
 *
465
 * Initialize frame structure.
466
 *
467
 * @param frame Frame structure to be initialized.
468
 * @param zone Host frame zone.
469
 */
470
void frame_initialize(frame_t *frame, zone_t *zone)
471
{
533 bondari 472
    frame->refcount = 1;
473
    frame->buddy_order = 0;
367 jermar 474
}
479 bondari 475
 
476
 
477
/** Buddy system find_buddy implementation
489 jermar 478
 *
479
 * @param b Buddy system.
480 bondari 480
 * @param block Block for which buddy should be found
479 bondari 481
 *
480 bondari 482
 * @return Buddy for given block if found
479 bondari 483
 */
489 jermar 484
link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * block) {
539 jermar 485
    frame_t * frame;
480 bondari 486
    zone_t * zone;
564 jermar 487
    index_t index;
480 bondari 488
    bool is_left, is_right;
479 bondari 489
 
480 bondari 490
    frame = list_get_instance(block, frame_t, buddy_link);
533 bondari 491
    zone = (zone_t *) b->data;
724 palkovsky 492
    ASSERT(IS_BUDDY_ORDER_OK(FRAME_INDEX_ABS(zone, frame), frame->buddy_order));
480 bondari 493
 
564 jermar 494
 
724 palkovsky 495
    is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame);
496
    is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame);
480 bondari 497
 
564 jermar 498
    ASSERT(is_left ^ is_right);
499
 
533 bondari 500
    if (is_left) {
501
        index = (FRAME_INDEX(zone, frame)) + (1 << frame->buddy_order);
615 palkovsky 502
    } else { // if (is_right)
533 bondari 503
        index = (FRAME_INDEX(zone, frame)) - (1 << frame->buddy_order);
504
    }
505
 
506
    if (FRAME_INDEX_VALID(zone, index)) {
507
        if (    zone->frames[index].buddy_order == frame->buddy_order &&
508
            zone->frames[index].refcount == 0) {
509
            return &zone->frames[index].buddy_link;
480 bondari 510
        }
511
    }
512
 
539 jermar 513
    return NULL;   
479 bondari 514
}
515
 
516
/** Buddy system bisect implementation
517
 *
489 jermar 518
 * @param b Buddy system.
480 bondari 519
 * @param block Block to bisect
520
 *
521
 * @return right block
479 bondari 522
 */
489 jermar 523
link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block) {
480 bondari 524
    frame_t * frame_l, * frame_r;
564 jermar 525
 
480 bondari 526
    frame_l = list_get_instance(block, frame_t, buddy_link);
533 bondari 527
    frame_r = (frame_l + (1 << (frame_l->buddy_order - 1)));
564 jermar 528
 
480 bondari 529
    return &frame_r->buddy_link;
479 bondari 530
}
531
 
532
/** Buddy system coalesce implementation
533
 *
489 jermar 534
 * @param b Buddy system.
480 bondari 535
 * @param block_1 First block
536
 * @param block_2 First block's buddy
537
 *
538
 * @return Coalesced block (actually block that represents lower address)
479 bondari 539
 */
489 jermar 540
link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * block_1, link_t * block_2) {
480 bondari 541
    frame_t * frame1, * frame2;
564 jermar 542
 
480 bondari 543
    frame1 = list_get_instance(block_1, frame_t, buddy_link);
544
    frame2 = list_get_instance(block_2, frame_t, buddy_link);
564 jermar 545
 
533 bondari 546
    return frame1 < frame2 ? block_1 : block_2;
479 bondari 547
}
548
 
549
/** Buddy system set_order implementation
489 jermar 550
 *
551
 * @param b Buddy system.
480 bondari 552
 * @param block Buddy system block
553
 * @param order Order to set
479 bondari 554
 */
489 jermar 555
void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order) {
480 bondari 556
    frame_t * frame;
557
    frame = list_get_instance(block, frame_t, buddy_link);
558
    frame->buddy_order = order;
479 bondari 559
}
560
 
561
/** Buddy system get_order implementation
489 jermar 562
 *
563
 * @param b Buddy system.
480 bondari 564
 * @param block Buddy system block
479 bondari 565
 *
480 bondari 566
 * @return Order of block
479 bondari 567
 */
489 jermar 568
__u8 zone_buddy_get_order(buddy_system_t *b, link_t * block) {
480 bondari 569
    frame_t * frame;
570
    frame = list_get_instance(block, frame_t, buddy_link);
571
    return frame->buddy_order;
479 bondari 572
}
533 bondari 573
 
574
/** Buddy system mark_busy implementation
575
 *
576
 * @param b Buddy system
577
 * @param block Buddy system block
578
 *
579
 */
580
void zone_buddy_mark_busy(buddy_system_t *b, link_t * block) {
581
    frame_t * frame;
582
    frame = list_get_instance(block, frame_t, buddy_link);
583
    frame->refcount = 1;
584
}
676 bondari 585
 
677 bondari 586
/** Prints list of zones
587
 *
588
 */
676 bondari 589
void zone_print_list(void) {
590
    zone_t *zone = NULL;
591
    link_t *cur;
701 jermar 592
    ipl_t ipl;
593
 
594
    ipl = interrupts_disable();
683 bondari 595
    spinlock_lock(&zone_head_lock);
686 bondari 596
    printf("Base address\tFree Frames\tBusy Frames\n");
597
    printf("------------\t-----------\t-----------\n");
676 bondari 598
    for (cur = zone_head.next; cur != &zone_head; cur = cur->next) {
599
        zone = list_get_instance(cur, zone_t, link);
683 bondari 600
        spinlock_lock(&zone->lock);
686 bondari 601
        printf("%L\t%d\t\t%d\n",zone->base, zone->free_count, zone->busy_count);
701 jermar 602
        spinlock_unlock(&zone->lock);
676 bondari 603
    }
683 bondari 604
    spinlock_unlock(&zone_head_lock);
701 jermar 605
    interrupts_restore(ipl);
676 bondari 606
}
607
 
677 bondari 608
/** Prints zone details
609
 *
683 bondari 610
 * @param base Zone base address
677 bondari 611
 */
683 bondari 612
void zone_print_one(__address base) {
613
    zone_t *zone = NULL, *z ;
676 bondari 614
    link_t *cur;
701 jermar 615
    ipl_t ipl;
616
 
617
    ipl = interrupts_disable();
683 bondari 618
    spinlock_lock(&zone_head_lock);
619
 
676 bondari 620
    for (cur = zone_head.next; cur != &zone_head; cur = cur->next) {
683 bondari 621
        z = list_get_instance(cur, zone_t, link);
622
        if (base == z->base) {
623
            zone = z;
676 bondari 624
            break;
625
        }
626
    }
627
 
628
    if (!zone) {
701 jermar 629
        spinlock_unlock(&zone_head_lock);
630
        interrupts_restore(ipl);
683 bondari 631
        printf("No zone with address %X\n", base);
676 bondari 632
        return;
633
    }
634
 
683 bondari 635
    spinlock_lock(&zone->lock);
636
    printf("Memory zone information\n\n");
676 bondari 637
    printf("Zone base address: %P\n", zone->base);
701 jermar 638
    printf("Zone size: %d frames (%dK)\n", zone->free_count + zone->busy_count, ((zone->free_count + zone->busy_count) * FRAME_SIZE) >> 10);
639
    printf("Allocated space: %d frames (%dK)\n", zone->busy_count, (zone->busy_count * FRAME_SIZE) >> 10);
640
    printf("Available space: %d (%dK)\n", zone->free_count, (zone->free_count * FRAME_SIZE) >> 10);
683 bondari 641
 
642
    printf("\nBuddy allocator structures:\n\n");
686 bondari 643
    buddy_system_structure_print(zone->buddy_system, FRAME_SIZE);
683 bondari 644
 
645
    spinlock_unlock(&zone->lock);
646
    spinlock_unlock(&zone_head_lock);
701 jermar 647
    interrupts_restore(ipl);
676 bondari 648
}
649