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#define FRAME_PANIC 2   /* panic on failure */
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#define FRAME_PANIC 2   /* panic on failure */
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struct frame_zone {
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struct frame_zone {
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    link_t fz_link;     /**< link to previous and next frame_zone */
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    link_t fz_link;     /**< link to previous and next frame_zone */
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    spinlock_t lock;    /**< this lock protexts everything below */
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    spinlock_t lock;    /**< this lock protects everything below */
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    __address base;     /**< physical address of the first frame in the frames array */
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    frame_t *frames;    /**< array of frame_t structures in this zone */
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    link_t free_head;   /**< list of free frames */
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    link_t free_head;   /**< list of free frame_t structures */
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    link_t busy_head;   /**< list of busy frames */
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    link_t busy_head;   /**< list of busy frame_t structures */
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    count_t free_count; /**< frames in free list */
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    count_t free_count; /**< number of frame_t structures in free list */
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    count_t busy_count; /**< frames in busy list */
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    count_t busy_count; /**< number of frame_t structures in busy list */
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    frame_t *frames;    /**< array of frames in this zone */
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    int flags;
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    int flags;
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};
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};
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struct frame {
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struct frame {
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    count_t refcount;   /**< when > 0, the frame is in busy list, otherwise the frame is in free list */
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    count_t refcount;   /**< when > 0, the frame is in busy list, otherwise the frame is in free list */
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__address frame_alloc(int flags);
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__address frame_alloc(int flags);
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extern void frame_free(__address addr);
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extern void frame_free(__address addr);
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extern void frame_not_free(__address addr);
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extern void frame_not_free(__address addr);
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extern void frame_region_not_free(__address start, __address stop);
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extern void frame_region_not_free(__address start, __address stop);
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extern frame_zone_t *frame_zone_create();
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#endif
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#endif