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#define PAGE_SIZE   FRAME_SIZE
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#define PAGE_SIZE   FRAME_SIZE
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#define KA2PA(x)    ((__address) (x))
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#define KA2PA(x)    ((__address) (x))
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#define PA2KA(x)    ((__address) (x))
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#define PA2KA(x)    ((__address) (x))
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#define PTL0_INDEX_ARCH(vaddr)      0
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#define PTL1_INDEX_ARCH(vaddr)      0
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#define PTL2_INDEX_ARCH(vaddr)      0
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#define PTL3_INDEX_ARCH(vaddr)      0
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#define GET_PTL0_ADDRESS_ARCH()     0
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#define GET_PTL0_ADDRESS_ARCH()     0
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#define SET_PTL0_ADDRESS_ARCH(ptl0)
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#define SET_PTL0_ADDRESS_ARCH(ptl0)
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#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      ((pte_t *) 0)
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#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      ((pte_t *) 0)
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#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      ((pte_t *) 0)
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#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     ((pte_t *) 0)
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#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)
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#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
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#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
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#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)
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#define GET_PTL1_FLAGS_ARCH(ptl0, i)        0
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#define GET_PTL2_FLAGS_ARCH(ptl1, i)        0
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#define GET_PTL3_FLAGS_ARCH(ptl2, i)        0
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#define GET_FRAME_FLAGS_ARCH(ptl3, i)       0
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#define SET_PTL1_FLAGS_ARCH(ptl0, i, x)
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#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
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#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
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#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)
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union page_address {
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union page_address {
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    __address address;
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    __address address;
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    struct {
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    struct {
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        __u64 vpn : 51;     /**< Virtual Page Number. */
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        __u64 vpn : 51;     /**< Virtual Page Number. */
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        unsigned offset : 13;   /**< Offset. */
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        unsigned offset : 13;   /**< Offset. */