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#define FRAME2ADDR(zone, frame)         ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)
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#define FRAME2ADDR(zone, frame)         ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)
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#define ADDR2FRAME(zone, addr)          (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE]))
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#define ADDR2FRAME(zone, addr)          (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE]))
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#define FRAME_INDEX(zone, frame)        ((index_t)((frame) - (zone)->frames))
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#define FRAME_INDEX(zone, frame)        ((index_t)((frame) - (zone)->frames))
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#define FRAME_INDEX_VALID(zone, index)      (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))
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#define FRAME_INDEX_VALID(zone, index)      (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))
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#define IS_BUDDY_ORDER_OK(index, order)     ((~(((__native) -1) << (order)) & (index)) == 0)
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#define IS_BUDDY_LEFT_BLOCK(zone, frame)    ((FRAME_INDEX((zone), (frame)) & ~(((__native) -1)<<((frame)->buddy_order + 1))) == 0)
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#define IS_BUDDY_LEFT_BLOCK(zone, frame)    (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
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#define IS_BUDDY_RIGHT_BLOCK(zone, frame)   (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
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#define ZONE_BLACKLIST_SIZE 3
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#define ZONE_BLACKLIST_SIZE 3
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struct zone {
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struct zone {
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    link_t link;        /**< link to previous and next zone */
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    link_t link;        /**< link to previous and next zone */