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#define KEY_PAGE    1
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#define KEY_PAGE    1
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#define PAGE_HT_ENTRIES_BITS    13
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#define PAGE_HT_ENTRIES_BITS    13
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#define PAGE_HT_ENTRIES     (1<<PAGE_HT_ENTRIES_BITS)
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#define PAGE_HT_ENTRIES     (1<<PAGE_HT_ENTRIES_BITS)
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#define PTE_VALID_ARCH(pte)     ((pte) != NULL)
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#define PTE_PRESENT_ARCH(pte)       ((pte)->p != 0)
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#define PTE_GET_FRAME_ARCH(pte)     ((pte)->frame)
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struct pte {
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struct pte {
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    link_t link;        /**< Page hash table link. */
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    link_t link;        /**< Page hash table link. */
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    as_t *as;       /**< Address space. */
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    as_t *as;       /**< Address space. */
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    __address page;     /**< Virtual memory page. */
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    __address page;     /**< Virtual memory page. */
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    __address frame;    /**< Physical memory frame. */
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    __address frame;    /**< Physical memory frame. */