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Ignore whitespace Rev 813 → Rev 814

/kernel/trunk/generic/include/mm/frame.h
35,10 → 35,15
#include <adt/list.h>
#include <synch/spinlock.h>
#include <mm/buddy.h>
#include <mm/slab.h>
#include <arch/mm/page.h>
 
#define ONE_FRAME 0
 
#define ZONES_MAX 16 /**< Maximum number of zones in system */
 
#define ZONE_JOIN 0x1 /**< If possible, merge with neighberhood zones */
 
 
#define FRAME_KA 0x1 /* skip frames conflicting with user address space */
#define FRAME_PANIC 0x2 /* panic on failure */
#define FRAME_ATOMIC 0x4 /* do not panic and do not sleep on failure */
48,92 → 53,61
#define FRAME_NO_MEMORY 1 /* frame_alloc return status */
#define FRAME_ERROR 2 /* frame_alloc return status */
 
#define FRAME2ADDR(zone, frame) ((zone)->base + (((frame) - (zone)->frames) << FRAME_WIDTH))
#define ADDR2FRAME(zone, addr) (&((zone)->frames[(((addr) - (zone)->base) >> FRAME_WIDTH)]))
#define FRAME_INDEX(zone, frame) ((index_t)((frame) - (zone)->frames))
#define FRAME_INDEX_ABS(zone, frame) (((index_t)((frame) - (zone)->frames)) + (zone)->base_index)
#define FRAME_INDEX_VALID(zone, index) (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))
/* Return true if the interlvals overlap */
static inline int overlaps(__address s1,__address e1, __address s2, __address e2)
{
if (s1 >= s2 && s1 < e2)
return 1;
if (e1 >= s2 && e1 < e2)
return 1;
if ((s1 < s2) && (e1 >= e2))
return 1;
return 0;
}
 
static inline __address PFN2ADDR(pfn_t frame)
{
return (__address)(frame << PAGE_WIDTH);
}
 
static inline pfn_t ADDR2PFN(__address addr)
{
return (pfn_t)(addr >> PAGE_WIDTH);
}
 
static inline pfn_t SIZE2PFN(__address size)
{
if (!size)
return 0;
return (pfn_t)((size-1) >> PAGE_WIDTH)+1;
}
 
#define IS_BUDDY_ORDER_OK(index, order) ((~(((__native) -1) << (order)) & (index)) == 0)
#define IS_BUDDY_LEFT_BLOCK(zone, frame) (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
#define IS_BUDDY_RIGHT_BLOCK(zone, frame) (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
#define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame) (((FRAME_INDEX_ABS((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
#define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame) (((FRAME_INDEX_ABS((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
#define IS_BUDDY_LEFT_BLOCK(zone, frame) (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
#define IS_BUDDY_RIGHT_BLOCK(zone, frame) (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
#define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame) (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
#define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame) (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
 
#define ZONE_BLACKLIST_SIZE 8
 
#define frame_alloc(order, flags) frame_alloc_generic(order, flags, NULL, NULL)
#define frame_alloc_rc(order, flags, status) frame_alloc_generic(order, flags, status, NULL)
#define frame_alloc_rc_zone(order, flags, status, zone) frame_alloc_generic(order, flags, status, zone)
 
struct zone {
link_t link; /**< link to previous and next zone */
 
SPINLOCK_DECLARE(lock); /**< this lock protects everything below */
__address base; /**< physical address of the first frame in the frames array */
index_t base_index; /**< frame index offset of the zone base */
frame_t *frames; /**< array of frame_t structures in this zone */
count_t free_count; /**< number of free frame_t structures */
count_t busy_count; /**< number of busy frame_t structures */
buddy_system_t * buddy_system; /**< buddy system for the zone */
int flags;
};
 
struct frame {
count_t refcount; /**< tracking of shared frames */
__u8 buddy_order; /**< buddy system block order */
link_t buddy_link; /**< link to the next free block inside one order */
void *parent; /**< If allocated by slab, this points there */
};
 
struct region {
__address base;
size_t size;
};
 
extern region_t zone_blacklist[];
extern count_t zone_blacklist_count;
extern void frame_region_not_free(__address base, size_t size);
extern void zone_create_in_region(__address base, size_t size);
 
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 zone_t *zone_create(__address start, size_t size, int flags);
extern void zone_attach(zone_t *zone);
 
extern void frame_init(void);
extern void frame_initialize(frame_t *frame, zone_t *zone);
 
__address frame_alloc_generic(__u8 order, int flags, int * status, zone_t **pzone);
 
 
__address frame_alloc_generic(__u8 order, int flags, int * status, int *pzone);
extern void frame_free(__address addr);
 
zone_t * get_zone_by_frame(frame_t * frame);
extern void zone_create(pfn_t start, pfn_t count, pfn_t confframe, int flags);
 
/*
* Buddy system operations
*/
link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * buddy);
link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block);
link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * buddy_l, link_t * buddy_r);
void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order);
__u8 zone_buddy_get_order(buddy_system_t *b, link_t * block);
void zone_buddy_mark_busy(buddy_system_t *b, link_t * block);
extern frame_t * frame_addr2frame(__address addr);
void * frame_get_parent(pfn_t frame, int hint);
void frame_set_parent(pfn_t frame, void *data, int hint);
void frame_mark_unavailable(pfn_t start, pfn_t count);
__address zone_conf_size(pfn_t start, pfn_t count);
 
/*
* TODO: Implement the following functions.
*/
extern frame_t *frame_reference(frame_t *frame);
extern void frame_release(frame_t *frame);
 
 
/*
* Console functions
*/
extern void zone_print_list(void);
extern void zone_print_one(__address base);
void zone_print_one(int znum);
 
#endif