page_frame.h

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struct page_frame {
        struct list_head page_head;

        int order;
        void *pma;

        int refcnt;
};

extern int page_frame_init(struct zone *zone, void *base, size_t size);
extern int page_frame_fini(struct zone *zone);

extern void *page_frame_alloc(enum zone_type zone, size_t nr_pages);

extern int page_frame_free(void *ptr);

extern int page_frame_ref(void *page);

extern int page_frame_refcnt(void *page);

extern int page_frame_manage(enum zone_type type, void *page, int nr_pages);