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); |