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#include <arch/types.h>
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#include <arch/types.h>
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#include <arch/mm/frame.h>
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#include <arch/mm/frame.h>
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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)
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#define KA2PA(x)    ((x) - 0x80000000)
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#define PA2KA(x)    (x)
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#define PA2KA(x)    ((x) + 0x80000000)
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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;