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#ifdef KERNEL
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#ifdef KERNEL
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/*
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/*
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 * Implementation of generic 4-level page table interface.
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 * Implementation of generic 4-level page table interface.
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 * NOTE: this implementation is under construction
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 *
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 *
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 * Page table layout:
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 * Page table layout:
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 * - 32-bit virtual addresses
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 * - 32-bit virtual addresses
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 * - Offset is 14 bits => pages are 16K long
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 * - Offset is 14 bits => pages are 16K long
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 * - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long
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 * - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long