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Track valid physical memory pages using a PFN bitmap
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This commit is contained in:
Aiken Harris
2026-03-17 00:05:33 +01:00
parent 3d7fe25471
commit 876923e107
7 changed files with 228 additions and 2 deletions
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4
xtoskrnl/includes/mm/mmgr.hh
View File

@@ -20,11 +20,13 @@ namespace MM
private:
STATIC MMMEMORY_LAYOUT MemoryLayout;
STATIC PFN_NUMBER NumberOfSystemPtes;
STATIC PPHYSICAL_MEMORY_DESCRIPTOR PhysicalMemoryBlock;
public:
STATIC XTAPI ULONG_PTR GetInstalledMemorySize(VOID);
STATIC XTAPI PMMMEMORY_LAYOUT GetMemoryLayout(VOID);
STATIC XTAPI PFN_NUMBER GetNumberOfSystemPtes();
STATIC XTAPI PFN_NUMBER GetNumberOfSystemPtes(VOID);
STATIC XTAPI PPHYSICAL_MEMORY_DESCRIPTOR GetPhysicalMemoryBlock(VOID);
STATIC XTAPI VOID InitializeMemoryLayout(VOID);
STATIC XTAPI VOID InitializeMemoryManager(VOID);
STATIC XTAPI BOOLEAN VerifyMemoryTypeFree(IN LOADER_MEMORY_TYPE MemoryType);

2
xtoskrnl/includes/mm/pfn.hh
View File

@@ -30,6 +30,7 @@ namespace MM
STATIC ULONGLONG NumberOfPhysicalPages;
STATIC LOADER_MEMORY_DESCRIPTOR OriginalFreeDescriptor;
STATIC PMMPFNLIST PageLocationList[];
STATIC RTL_BITMAP PfnBitMap;
STATIC MMPFNLIST RomPagesList;
STATIC MMPFNLIST StandbyPagesList;
STATIC MMPFNLIST ZeroedPagesList;
@@ -49,6 +50,7 @@ namespace MM
STATIC XTAPI ULONG_PTR GetHighestPhysicalPage(VOID);
STATIC XTAPI ULONGLONG GetNumberOfPhysicalPages(VOID);
STATIC XTAPI PMMPFN GetPfnEntry(IN PFN_NUMBER Pfn);
STATIC XTAPI VOID InitializePfnBitmap(VOID);
STATIC XTAPI VOID InitializePfnDatabase(VOID);
STATIC XTAPI VOID LinkPfn(IN PFN_NUMBER PageFrameIndex,
IN PMMPTE PointerPte,