| 33,10 → 33,14 |
|---|
| #include <typedefs.h> |
| #include <list.h> |
| #include <synch/spinlock.h> |
| #include <mm/buddy.h> |
| |
| #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
| #define FRAME_PANIC 2 /* panic on failure */ |
| |
| #define FRAME2ADDR(zone, frame) ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE) |
| #define ADDR2FRAME(zone, addr) (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE])) |
| |
| struct zone { |
| link_t link; /**< link to previous and next zone */ |
| |
| 46,6 → 50,8 |
|---|
| link_t free_head; /**< list of free frame_t structures */ |
| count_t free_count; /**< number of frame_t structures in free list */ |
| count_t busy_count; /**< number of frame_t structures not in free list */ |
| |
| buddy_system_t * buddy_system; /**< buddy system allocator for the zone */ |
| int flags; |
| }; |
| |
| 52,6 → 58,8 |
|---|
| struct frame { |
| count_t refcount; /**< when == 0, the frame is in free list */ |
| link_t link; /**< link to zone free list when refcount == 0 */ |
| __u8 order; /**< buddy system block order */ |
| link_t buddy_link; /**< link to the next free block inside one order*/ |
| }; |
| |
| extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
| 69,6 → 77,18 |
|---|
| extern void frame_region_not_free(__address start, __address stop); |
| |
| /* |
| * Buddy system operations |
| */ |
| link_t * zone_buddy_find_buddy(link_t * buddy); |
| link_t * zone_buddy_bisect(link_t * block); |
| link_t * zone_buddy_coalesce(link_t * buddy_l, link_t * buddy_r); |
| void zone_buddy_set_order(link_t * block, __u8 order); |
| __u8 zone_buddy_get_order(link_t * block); |
| |
| __address zone_buddy_frame_alloc(int flags, __u8 order); |
| void zone_buddy_frame_free(__address addr); |
| |
| /* |
| * TODO: Implement the following functions. |
| */ |
| extern frame_t *frame_reference(frame_t *frame); |