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31 | 31 | ||
32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
33 | #include <typedefs.h> |
33 | #include <typedefs.h> |
34 | #include <list.h> |
34 | #include <list.h> |
35 | #include <synch/spinlock.h> |
35 | #include <synch/spinlock.h> |
- | 36 | #include <mm/buddy.h> |
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36 | 37 | ||
37 | #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
38 | #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
38 | #define FRAME_PANIC 2 /* panic on failure */ |
39 | #define FRAME_PANIC 2 /* panic on failure */ |
39 | 40 | ||
- | 41 | #define FRAME2ADDR(zone, frame) ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE) |
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- | 42 | #define ADDR2FRAME(zone, addr) (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE])) |
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- | 43 | ||
40 | struct zone { |
44 | struct zone { |
41 | link_t link; /**< link to previous and next zone */ |
45 | link_t link; /**< link to previous and next zone */ |
42 | 46 | ||
43 | spinlock_t lock; /**< this lock protects everything below */ |
47 | spinlock_t lock; /**< this lock protects everything below */ |
44 | __address base; /**< physical address of the first frame in the frames array */ |
48 | __address base; /**< physical address of the first frame in the frames array */ |
45 | frame_t *frames; /**< array of frame_t structures in this zone */ |
49 | frame_t *frames; /**< array of frame_t structures in this zone */ |
46 | link_t free_head; /**< list of free frame_t structures */ |
50 | link_t free_head; /**< list of free frame_t structures */ |
47 | count_t free_count; /**< number of frame_t structures in free list */ |
51 | count_t free_count; /**< number of frame_t structures in free list */ |
48 | count_t busy_count; /**< number of frame_t structures not in free list */ |
52 | count_t busy_count; /**< number of frame_t structures not in free list */ |
- | 53 | ||
- | 54 | buddy_system_t * buddy_system; /**< buddy system allocator for the zone */ |
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49 | int flags; |
55 | int flags; |
50 | }; |
56 | }; |
51 | 57 | ||
52 | struct frame { |
58 | struct frame { |
53 | count_t refcount; /**< when == 0, the frame is in free list */ |
59 | count_t refcount; /**< when == 0, the frame is in free list */ |
54 | link_t link; /**< link to zone free list when refcount == 0 */ |
60 | link_t link; /**< link to zone free list when refcount == 0 */ |
- | 61 | __u8 order; /**< buddy system block order */ |
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- | 62 | link_t buddy_link; /**< link to the next free block inside one order*/ |
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55 | }; |
63 | }; |
56 | 64 | ||
57 | extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
65 | extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
58 | extern link_t zone_head; /**< list of all zones in the system */ |
66 | extern link_t zone_head; /**< list of all zones in the system */ |
59 | 67 | ||
Line 67... | Line 75... | ||
67 | extern void frame_free(__address addr); |
75 | extern void frame_free(__address addr); |
68 | extern void frame_not_free(__address addr); |
76 | extern void frame_not_free(__address addr); |
69 | extern void frame_region_not_free(__address start, __address stop); |
77 | extern void frame_region_not_free(__address start, __address stop); |
70 | 78 | ||
71 | /* |
79 | /* |
- | 80 | * Buddy system operations |
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- | 81 | */ |
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- | 82 | link_t * zone_buddy_find_buddy(link_t * buddy); |
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- | 83 | link_t * zone_buddy_bisect(link_t * block); |
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- | 84 | link_t * zone_buddy_coalesce(link_t * buddy_l, link_t * buddy_r); |
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- | 85 | void zone_buddy_set_order(link_t * block, __u8 order); |
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- | 86 | __u8 zone_buddy_get_order(link_t * block); |
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- | 87 | ||
- | 88 | __address zone_buddy_frame_alloc(int flags, __u8 order); |
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- | 89 | void zone_buddy_frame_free(__address addr); |
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- | 90 | ||
- | 91 | /* |
|
72 | * TODO: Implement the following functions. |
92 | * TODO: Implement the following functions. |
73 | */ |
93 | */ |
74 | extern frame_t *frame_reference(frame_t *frame); |
94 | extern frame_t *frame_reference(frame_t *frame); |
75 | extern void frame_release(frame_t *frame); |
95 | extern void frame_release(frame_t *frame); |
76 | 96 |