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kolibrios/kernel/branches/kolibri_pe/include/mm.h
Sergey Semyonov (Serge) 4ad5e0815b kernel heap: use on demand mapping
git-svn-id: svn://kolibrios.org@1066 a494cfbc-eb01-0410-851d-a64ba20cac60
2009-04-23 12:26:47 +00:00

104 lines
2.3 KiB
C

typedef struct
{
link_t link;
addr_t base;
size_t size;
addr_t pte[0];
}mmap_t;
typedef struct
{
link_t buddy_link; /**< link to the next free block inside one order */
u16_t refcount; /**< tracking of shared frames */
u16_t buddy_order; /**< buddy system block order */
void *parent; /**< If allocated by slab, this points there */
} frame_t;
typedef struct
{
SPINLOCK_DECLARE(lock); /**< this lock protects everything below */
pfn_t base; /**< frame_no of the first frame in the frames array */
count_t count; /**< Size of zone */
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 */
u32_t max_order;
link_t order[21];
int flags;
} zone_t;
typedef struct
{
link_t link;
link_t adj;
addr_t base;
size_t size;
void *parent;
u32_t state;
}md_t;
#define PG_MAP 1
#define PG_WRITE 2
#define PG_USER 4
#define PG_SW 3
#define PG_UW 7
#define PAGE_SIZE 4096
#define PAGE_WIDTH 12
# define PA2KA(x) (((addr_t) (x)) + OS_BASE)
# define KA2PA(x) (((addr_t) (x)) - OS_BASE)
static inline count_t SIZE2FRAMES(size_t size)
{
if (!size)
return 0;
return (count_t) ((size - 1) >> PAGE_WIDTH) + 1;
}
static inline addr_t PFN2ADDR(pfn_t frame)
{
return (addr_t) (frame << PAGE_WIDTH);
}
static inline pfn_t ADDR2PFN(addr_t addr)
{
return (pfn_t) (addr >> PAGE_WIDTH);
};
void init_mm();
void init_pg_slab();
void* __fastcall frame_get_parent(pfn_t pfn);
void __fastcall frame_set_parent(pfn_t pfn, void *data);
addr_t __fastcall core_alloc(u32_t order);
void __fastcall core_free(addr_t frame);
addr_t alloc_page(void);
md_t* __fastcall md_alloc(size_t size, u32_t flags) ;
void __fastcall md_free(md_t *md);
addr_t __fastcall __export mem_alloc(size_t size, u32_t flags) asm ("MemAlloc");
void __fastcall __export mem_free(addr_t mem) asm ("MemFree");
addr_t __fastcall frame_alloc(size_t size);
size_t __fastcall frame_free(addr_t addr);