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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)    ((x) - 0x80000000)
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#define KA2PA(x)    ((x) - 0x80000000)
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#define PA2KA(x)    ((x) + 0x80000000)
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#define PA2KA(x)    ((x) + 0x80000000)
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/*
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 * Implementation of generic 4-level page table interface.
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 * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out.
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 */
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#define PTL0_INDEX_ARCH(vaddr)  (((vaddr)>>22)&0x3ff)
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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)  (((vaddr)>>12)&0x3ff)
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#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12))
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#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      (ptl1)
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#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      (ptl2)
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#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12))
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struct page_specifier {
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struct page_specifier {
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    unsigned present : 1;
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    unsigned present : 1;
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    unsigned writeable : 1;
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    unsigned writeable : 1;
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    unsigned uaccessible : 1;
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    unsigned uaccessible : 1;
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    unsigned page_write_through : 1;
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    unsigned page_write_through : 1;
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    unsigned : 2;
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    unsigned : 2;
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    unsigned avl : 3;
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    unsigned avl : 3;
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    unsigned frame_address : 20;
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    unsigned frame_address : 20;
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} __attribute__ ((packed));
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} __attribute__ ((packed));
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typedef struct page_specifier   pte_t;
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extern void page_arch_init(void);
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extern void page_arch_init(void);
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#endif
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#endif