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#ifndef __ALLOC_PAGE_H__

#define __ALLOC_PAGE_H__

#include <memcache/memcache.h>

/* List member to keep track of free and unused physical pages.

 * Has PAGE_SIZE granularity */

struct page_area {

        struct link list;

        unsigned int used;      /* Used or free */

        unsigned int pfn;       /* Base pfn */

        unsigned int numpages;  /* Number of pages this region covers */

        struct mem_cache *cache;/* The cache used when freeing the page area for

                                 * quickly finding where the area is stored. */

};

struct page_allocator {

        struct link page_area_list;

        struct link pga_cache_list;

        int pga_free;

};

/* Initialises the page allocator */

void init_page_allocator(unsigned long start, unsigned long end);

/* Page allocation functions */

void *alloc_page(int quantity);

int free_page(void *paddr);

#endif /* __ALLOC_PAGE_H__ */