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Rev 852 Rev 946
Line 308... Line 308...
308
        index = (frame_index(zone, frame)) + (1 << frame->buddy_order);
308
        index = (frame_index(zone, frame)) + (1 << frame->buddy_order);
309
    } else { // if (is_right)
309
    } else { // if (is_right)
310
        index = (frame_index(zone, frame)) - (1 << frame->buddy_order);
310
        index = (frame_index(zone, frame)) - (1 << frame->buddy_order);
311
    }
311
    }
312
   
312
   
313
 
-
 
314
    if (frame_index_valid(zone, index)) {
313
    if (frame_index_valid(zone, index)) {
315
        if (zone->frames[index].buddy_order == frame->buddy_order &&
314
        if (zone->frames[index].buddy_order == frame->buddy_order &&
316
            zone->frames[index].refcount == 0) {
315
            zone->frames[index].refcount == 0) {
317
            return &zone->frames[index].buddy_link;
316
            return &zone->frames[index].buddy_link;
318
        }
317
        }
Line 467... Line 466...
467
 
466
 
468
    ASSERT(frame->refcount);
467
    ASSERT(frame->refcount);
469
 
468
 
470
    if (!--frame->refcount) {
469
    if (!--frame->refcount) {
471
        buddy_system_free(zone->buddy_system, &frame->buddy_link);
470
        buddy_system_free(zone->buddy_system, &frame->buddy_link);
-
 
471
   
-
 
472
        /* Update zone information. */
-
 
473
        zone->free_count += (1 << order);
-
 
474
        zone->busy_count -= (1 << order);
472
    }
475
    }
473
 
-
 
474
    /* Update zone information. */
-
 
475
    zone->free_count += (1 << order);
-
 
476
    zone->busy_count -= (1 << order);
-
 
477
}
476
}
478
 
477
 
479
/** Return frame from zone */
478
/** Return frame from zone */
480
static frame_t * zone_get_frame(zone_t *zone, index_t frame_idx)
479
static frame_t * zone_get_frame(zone_t *zone, index_t frame_idx)
481
{
480
{
Line 599... Line 598...
599
        newzone->busy_count++;
598
        newzone->busy_count++;
600
        zone_frame_free(newzone, pfn+i-newzone->base);
599
        zone_frame_free(newzone, pfn+i-newzone->base);
601
    }
600
    }
602
}
601
}
603
 
602
 
604
 
-
 
605
/** Reduce allocated block to count of order 0 frames
603
/** Reduce allocated block to count of order 0 frames
606
 *
604
 *
607
 * The allocated block need 2^order frames of space. Reduce all frames
605
 * The allocated block need 2^order frames of space. Reduce all frames
608
 * in block to order 0 and free the unneded frames. This means, that
606
 * in block to order 0 and free the unneded frames. This means, that
609
 * when freeing the block, you have to free every frame from block.
607
 * when freeing the block, you have to free every frame from block.
Line 706... Line 704...
706
errout:
704
errout:
707
    spinlock_unlock(&zones.lock);
705
    spinlock_unlock(&zones.lock);
708
    interrupts_restore(ipl);
706
    interrupts_restore(ipl);
709
}
707
}
710
 
708
 
711
 
-
 
712
/**
709
/**
713
 * Merge all zones into one big zone
710
 * Merge all zones into one big zone
714
 *
711
 *
715
 * It is reasonable to do this on systems whose bios reports parts in chunks,
712
 * It is reasonable to do this on systems whose bios reports parts in chunks,
716
 * so that we could have 1 zone (it's faster).
713
 * so that we could have 1 zone (it's faster).
Line 770... Line 767...
770
        z->frames[i].refcount = 0;
767
        z->frames[i].refcount = 0;
771
        buddy_system_free(z->buddy_system, &z->frames[i].buddy_link);
768
        buddy_system_free(z->buddy_system, &z->frames[i].buddy_link);
772
    }
769
    }
773
}
770
}
774
 
771
 
775
 
-
 
776
/** Compute configuration data size for zone */
772
/** Compute configuration data size for zone */
777
__address zone_conf_size(count_t count)
773
__address zone_conf_size(count_t count)
778
{
774
{
779
    int size = sizeof(zone_t) + count*sizeof(frame_t);
775
    int size = sizeof(zone_t) + count*sizeof(frame_t);
780
    int max_order;
776
    int max_order;
Line 782... Line 778...
782
    max_order = fnzb(count);
778
    max_order = fnzb(count);
783
    size += buddy_conf_size(max_order);
779
    size += buddy_conf_size(max_order);
784
    return size;
780
    return size;
785
}
781
}
786
 
782
 
787
 
-
 
788
/** Create and add zone to system
783
/** Create and add zone to system
789
 *
784
 *
790
 * @param confframe Where configuration frame is supposed to be.
785
 * @param confframe Where configuration frame is supposed to be.
791
 *                  Always check, that we will not disturb the kernel and possibly init.
786
 *                  Always check, that we will not disturb the kernel and possibly init.
792
 *                  If confframe is given _outside_ this zone, it is expected,
787
 *                  If confframe is given _outside_ this zone, it is expected,