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35 | #include <synch/spinlock.h> |
35 | #include <synch/spinlock.h> |
36 | 36 | ||
37 | #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
37 | #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
38 | #define FRAME_PANIC 2 /* panic on failure */ |
38 | #define FRAME_PANIC 2 /* panic on failure */ |
39 | 39 | ||
40 | struct frame_zone { |
40 | struct zone { |
41 | link_t fz_link; /**< link to previous and next frame_zone */ |
41 | link_t link; /**< link to previous and next zone */ |
42 | 42 | ||
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 */ |
Line 49... | Line 49... | ||
49 | count_t busy_count; /**< number of frame_t structures in busy list */ |
49 | count_t busy_count; /**< number of frame_t structures in busy list */ |
50 | int flags; |
50 | int flags; |
51 | }; |
51 | }; |
52 | 52 | ||
53 | struct frame { |
53 | struct frame { |
- | 54 | zone_t *zone; /**< host zone */ |
|
54 | count_t refcount; /**< when > 0, the frame is in busy list, otherwise the frame is in free list */ |
55 | count_t refcount; /**< when > 0, the frame is in busy list, otherwise the frame is in free list */ |
55 | link_t link; /**< link either to frame_zone free or busy list */ |
56 | link_t link; /**< link either to frame_zone free or busy list */ |
56 | }; |
57 | }; |
57 | 58 | ||
58 | extern spinlock_t frame_zone_head_lock; /**< this lock protects frame_zone_head list */ |
59 | extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
59 | extern link_t frame_zone_head; /**< list of all frame_zone's in the system */ |
60 | extern link_t zone_head; /**< list of all zones in the system */ |
60 | 61 | ||
61 | extern count_t frames; |
62 | extern count_t frames; |
62 | extern count_t frames_free; |
63 | extern count_t frames_free; |
63 | 64 | ||
64 | extern count_t kernel_frames; |
65 | extern count_t kernel_frames; |
Line 74... | Line 75... | ||
74 | __address frame_alloc(int flags); |
75 | __address frame_alloc(int flags); |
75 | extern void frame_free(__address addr); |
76 | extern void frame_free(__address addr); |
76 | extern void frame_not_free(__address addr); |
77 | extern void frame_not_free(__address addr); |
77 | extern void frame_region_not_free(__address start, __address stop); |
78 | extern void frame_region_not_free(__address start, __address stop); |
78 | 79 | ||
- | 80 | /* |
|
- | 81 | * TODO: Implement the following functions. |
|
- | 82 | */ |
|
- | 83 | ||
- | 84 | extern void zone_init(void); |
|
- | 85 | extern zone_t *zone_create(__address start, size_t size, int flags); |
|
- | 86 | extern void zone_attach(zone_t *zone); |
|
- | 87 | ||
- | 88 | /* |
|
79 | extern frame_zone_t *frame_zone_create(); |
89 | extern frame_t *frame_alloc(int flags); |
- | 90 | extern void frame_free(frame_t *frame); |
|
- | 91 | */ |
|
- | 92 | extern void frame_initialize(frame_t *frame); |
|
- | 93 | extern __address frame_get_address(frame_t *frame); |
|
- | 94 | extern frame_t *frame_reference(frame_t *frame); |
|
- | 95 | extern void frame_release(frame_t *frame); |
|
- | 96 | ||
80 | #endif |
97 | #endif |