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| 43 | spinlock_t lock; /**< this lock protects everything below */ |
43 | spinlock_t lock; /**< this lock protects everything below */ |
| 44 | __address base; /**< physical address of the first frame in the frames array */ |
44 | __address base; /**< physical address of the first frame in the frames array */ |
| 45 | frame_t *frames; /**< array of frame_t structures in this zone */ |
45 | frame_t *frames; /**< array of frame_t structures in this zone */ |
| 46 | link_t free_head; /**< list of free frame_t structures */ |
46 | link_t free_head; /**< list of free frame_t structures */ |
| 47 | link_t busy_head; /**< list of busy frame_t structures */ |
- | |
| 48 | count_t free_count; /**< number of frame_t structures in free list */ |
47 | count_t free_count; /**< number of frame_t structures in free list */ |
| 49 | count_t busy_count; /**< number of frame_t structures in busy list */ |
48 | count_t busy_count; /**< number of frame_t structures not in free list */ |
| 50 | int flags; |
49 | int flags; |
| 51 | }; |
50 | }; |
| 52 | 51 | ||
| 53 | struct frame { |
52 | struct frame { |
| 54 | count_t refcount; /**< when > 0, the frame is in busy list, otherwise the frame is in free list */ |
53 | count_t refcount; /**< when == 0, the frame is in free list */ |
| 55 | link_t link; /**< link either to frame_zone free or busy list */ |
54 | link_t link; /**< link to zone free list when refcount == 0 */ |
| 56 | }; |
55 | } __attribute__ ((packed)); |
| 57 | 56 | ||
| 58 | extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
57 | extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
| 59 | extern link_t zone_head; /**< list of all zones in the system */ |
58 | extern link_t zone_head; /**< list of all zones in the system */ |
| 60 | 59 | ||
| 61 | extern void zone_init(void); |
60 | extern void zone_init(void); |