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{

  link_t   link;

  addr_t   base;

  size_t   size;

  addr_t   pte[0];

{

  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;

{

  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 */

  count_t  free_count;        /**< number of free frame_t structures */

  count_t  busy_count;        /**< number of busy frame_t structures */

  link_t   order[21];

} zone_t;

{

    link_t  link;

    link_t  adj;

    addr_t  base;

    size_t  size;

    void   *parent;

    u32_t   state;

}md_t;

#define PG_WRITE        2

#define PG_USER         4

#define PG_UW           7

#define PAGE_WIDTH     12

# define KA2PA(x) (((addr_t) (x)) - OS_BASE)

{

    if (!size)

        return 0;

  return (count_t) ((size - 1) >> PAGE_WIDTH) + 1;

}

{

  return (addr_t) (frame << PAGE_WIDTH);

}

{

    return (pfn_t) (addr >> PAGE_WIDTH);

};

void init_pg_slab();

void  __fastcall frame_set_parent(pfn_t pfn, void *data);

void   __fastcall core_free(addr_t frame);

void  __fastcall md_free(md_t *md);

void   __fastcall __export mem_free(addr_t mem) asm ("MemFree");

size_t __fastcall frame_free(addr_t addr);