69 lines
2.9 KiB
C++
69 lines
2.9 KiB
C++
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/includes/mm/pfn.hh
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* DESCRIPTION: Physical Frame Number (PFN) support
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* DEVELOPERS: Aiken Harris <harraiken91@gmail.com>
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*/
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#ifndef __XTOSKRNL_MM_PFN_HH
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#define __XTOSKRNL_MM_PFN_HH
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#include <xtos.hh>
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/* Memory Manager */
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namespace MM
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{
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class Pfn
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{
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private:
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STATIC PFN_NUMBER AvailablePages;
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STATIC MMPFNLIST BadPagesList;
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STATIC PLOADER_MEMORY_DESCRIPTOR FreeDescriptor;
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STATIC MMPFNLIST FreePagesList;
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STATIC ULONG_PTR HighestPhysicalPage;
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STATIC PVOID HighestUserAddress;
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STATIC ULONG_PTR LowestPhysicalPage;
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STATIC MMPFNLIST ModifiedPagesList;
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STATIC MMPFNLIST ModifiedReadOnlyPagesList;
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STATIC ULONGLONG NumberOfPhysicalPages;
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STATIC LOADER_MEMORY_DESCRIPTOR OriginalFreeDescriptor;
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STATIC PMMPFNLIST PageLocationList[];
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STATIC PFN_NUMBER PfnDatabaseSize;
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STATIC MMPFNLIST StandbyPagesList;
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STATIC MMPFNLIST ZeroedPagesList;
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public:
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STATIC XTAPI PFN_NUMBER AllocateBootstrapPages(IN PFN_NUMBER NumberOfPages);
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STATIC XTAPI PFN_NUMBER AllocatePhysicalPage(IN ULONG Color);
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STATIC XTAPI VOID ComputePfnDatabaseSize(VOID);
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STATIC XTAPI ULONG_PTR GetHighestPhysicalPage(VOID);
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STATIC XTAPI ULONGLONG GetNumberOfPhysicalPages(VOID);
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STATIC XTAPI PFN_NUMBER GetPfnDatabaseSize(VOID);
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STATIC XTAPI PMMPFN GetPfnEntry(IN PFN_NUMBER Pfn);
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STATIC XTAPI VOID InitializePfnDatabase(VOID);
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STATIC VOID XTAPI LinkPfnToPte(IN PFN_NUMBER PageFrameIndex,
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IN PMMPTE PointerPte,
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IN BOOLEAN Modified);
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STATIC XTAPI VOID ScanMemoryDescriptors(VOID);
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private:
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STATIC XTAPI VOID DecrementAvailablePages(VOID);
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STATIC XTAPI VOID IncrementAvailablePages(VOID);
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STATIC XTAPI VOID InitializePageTablePfns(VOID);
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STATIC XTAPI VOID LinkFreePage(IN PFN_NUMBER PageFrameIndex);
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STATIC XTAPI VOID LinkPfnForPageTable(IN PFN_NUMBER PageFrameIndex,
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IN PMMPTE PointerPte);
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STATIC XTAPI VOID ProcessMemoryDescriptor(IN PFN_NUMBER BasePage,
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IN PFN_NUMBER PageCount,
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IN LOADER_MEMORY_TYPE MemoryType);
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STATIC XTAPI VOID ScanPageTable(IN PMMPTE PointerPte,
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IN ULONG Level);
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STATIC XTAPI PFN_NUMBER UnlinkFreePage(IN PFN_NUMBER PageFrameIndex,
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IN ULONG Color);
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};
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}
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#endif /* __XTOSKRNL_MM_PFN_HH */
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