| 37,8 → 37,8 |
|---|
| #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
| #define FRAME_PANIC 2 /* panic on failure */ |
| |
| struct frame_zone { |
| link_t fz_link; /**< link to previous and next frame_zone */ |
| struct zone { |
| link_t link; /**< link to previous and next zone */ |
| |
| spinlock_t lock; /**< this lock protects everything below */ |
| __address base; /**< physical address of the first frame in the frames array */ |
| 51,12 → 51,13 |
|---|
| }; |
| |
| struct frame { |
| zone_t *zone; /**< host zone */ |
| count_t refcount; /**< when > 0, the frame is in busy list, otherwise the frame is in free list */ |
| link_t link; /**< link either to frame_zone free or busy list */ |
| }; |
| |
| extern spinlock_t frame_zone_head_lock; /**< this lock protects frame_zone_head list */ |
| extern link_t frame_zone_head; /**< list of all frame_zone's in the system */ |
| extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
| extern link_t zone_head; /**< list of all zones in the system */ |
| |
| extern count_t frames; |
| extern count_t frames_free; |
| 76,5 → 77,21 |
|---|
| extern void frame_not_free(__address addr); |
| extern void frame_region_not_free(__address start, __address stop); |
| |
| extern frame_zone_t *frame_zone_create(); |
| /* |
| * TODO: Implement the following functions. |
| */ |
| |
| extern void zone_init(void); |
| extern zone_t *zone_create(__address start, size_t size, int flags); |
| extern void zone_attach(zone_t *zone); |
| |
| /* |
| extern frame_t *frame_alloc(int flags); |
| extern void frame_free(frame_t *frame); |
| */ |
| extern void frame_initialize(frame_t *frame); |
| extern __address frame_get_address(frame_t *frame); |
| extern frame_t *frame_reference(frame_t *frame); |
| extern void frame_release(frame_t *frame); |
| |
| #endif |