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Implement unified PTE accessors and management helpers
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This commit is contained in:
Aiken Harris
2025-10-30 20:14:02 +01:00
parent 0120ba167f
commit ffa480d69a
4 changed files with 810 additions and 9 deletions
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23
xtoskrnl/includes/mm/amd64/pagemap.hh
View File

@@ -21,14 +21,35 @@ namespace MM
MMPAGEMAP_INFO PageMapInfo;
public:
XTAPI PMMPTE AdvancePte(PMMPTE Pte,
ULONG Count);
XTAPI VOID ClearPte(PHARDWARE_PTE PtePointer);
XTAPI ULONGLONG GetEmptyPteList(VOID);
XTAPI ULONG_PTR GetNextEntry(PMMPTE Pte);
XTAPI PMMPTE GetNextPte(PMMPTE Pte);
XTAPI BOOLEAN GetOneEntry(PMMPTE Pte);
XTAPI PMMP5E GetP5eAddress(PVOID Address);
XTAPI ULONG GetP5eIndex(PVOID Address);
XTAPI PVOID GetP5eVirtualAddress(PMMP5E P5ePointer);
XTAPI PMMPDE GetPdeAddress(PVOID Address);
XTAPI ULONG GetPdeIndex(PVOID Address);
XTAPI PVOID GetPdeVirtualAddress(PMMPDE PdePointer);
XTAPI PMMPPE GetPpeAddress(PVOID Address);
XTAPI ULONG GetPpeIndex(PVOID Address);
XTAPI PVOID GetPpeVirtualAddress(PMMPPE PpePointer);
XTAPI PMMPTE GetPteAddress(PVOID Address);
XTAPI ULONG GetPteIndex(PVOID Address);
XTAPI ULONG GetPteSize(VOID);
XTAPI PVOID GetPteVirtualAddress(PMMPTE PtePointer);
XTAPI PMMPXE GetPxeAddress(PVOID Address);
virtual XTAPI VOID InitializePageMapInfo(VOID) = 0;
XTAPI ULONG GetPxeIndex(PVOID Address);
XTAPI PVOID GetPxeVirtualAddress(PMMPXE PxePointer);
VIRTUAL XTAPI VOID InitializePageMapInfo(VOID) = 0;
XTAPI BOOLEAN PteValid(PHARDWARE_PTE PtePointer);
XTAPI VOID SetNextEntry(PMMPTE Pte,
ULONG_PTR Value);
XTAPI VOID SetOneEntry(PMMPTE Pte,
BOOLEAN Value);
XTAPI VOID SetPte(PHARDWARE_PTE PtePointer,
PFN_NUMBER PageFrameNumber,
BOOLEAN Writable);

45
xtoskrnl/includes/mm/i686/pagemap.hh
View File

@@ -21,16 +21,33 @@ namespace MM
MMPAGEMAP_INFO PageMapInfo;
public:
VIRTUAL XTAPI PMMPTE AdvancePte(PMMPTE Pte,
ULONG Count) = 0;
XTAPI VOID ClearPte(PHARDWARE_PTE PtePointer);
XTAPI ULONG GetEmptyPteList(VOID);
VIRTUAL XTAPI ULONG_PTR GetNextEntry(PMMPTE Pte) = 0;
VIRTUAL XTAPI PMMPTE GetNextPte(PMMPTE Pte) = 0;
VIRTUAL XTAPI BOOLEAN GetOneEntry(PMMPTE Pte) = 0;
XTAPI PMMPDE GetPdeAddress(PVOID Address);
XTAPI ULONG GetPdeIndex(PVOID Address);
XTAPI PVOID GetPdeVirtualAddress(PMMPDE PdePointer);
XTAPI PMMPPE GetPpeAddress(PVOID Address);
XTAPI ULONG GetPpeIndex(PVOID Address);
XTAPI PVOID GetPpeVirtualAddress(PMMPPE PpePointer);
XTAPI PMMPTE GetPteAddress(PVOID Address);
virtual XTAPI VOID InitializePageMapInfo(VOID) = 0;
virtual XTAPI BOOLEAN PteValid(PHARDWARE_PTE PtePointer) = 0;
virtual XTAPI VOID SetPte(PHARDWARE_PTE PtePointer,
XTAPI ULONG GetPteIndex(PVOID Address);
VIRTUAL XTAPI ULONG GetPteSize(VOID) = 0;
XTAPI PVOID GetPteVirtualAddress(PMMPTE PtePointer);
VIRTUAL XTAPI VOID InitializePageMapInfo(VOID) = 0;
VIRTUAL XTAPI BOOLEAN PteValid(PHARDWARE_PTE PtePointer) = 0;
VIRTUAL XTAPI VOID SetNextEntry(PMMPTE Pte,
ULONG_PTR Value) = 0;
VIRTUAL XTAPI VOID SetOneEntry(PMMPTE Pte,
BOOLEAN Value) = 0;
VIRTUAL XTAPI VOID SetPte(PHARDWARE_PTE PtePointer,
PFN_NUMBER PageFrameNumber,
BOOLEAN Writable) = 0;
virtual XTAPI VOID SetPteCaching(PHARDWARE_PTE PtePointer,
VIRTUAL XTAPI VOID SetPteCaching(PHARDWARE_PTE PtePointer,
BOOLEAN CacheDisable,
BOOLEAN WriteThrough) = 0;
} PAGEMAP, *PPAGEMAP;
@@ -38,8 +55,18 @@ namespace MM
class PageMapBasic final : public PageMap
{
public:
XTAPI PMMPTE AdvancePte(PMMPTE Pte,
ULONG Count);
XTAPI ULONG_PTR GetNextEntry(PMMPTE Pte);
XTAPI PMMPTE GetNextPte(PMMPTE Pte);
XTAPI BOOLEAN GetOneEntry(PMMPTE Pte);
XTAPI ULONG GetPteSize(VOID);
XTAPI VOID InitializePageMapInfo(VOID);
XTAPI BOOLEAN PteValid(PHARDWARE_PTE PtePointer);
XTAPI VOID SetNextEntry(PMMPTE Pte,
ULONG_PTR Value);
XTAPI VOID SetOneEntry(PMMPTE Pte,
BOOLEAN Value);
XTAPI VOID SetPte(PHARDWARE_PTE PtePointer,
PFN_NUMBER PageFrameNumber,
BOOLEAN Writable);
@@ -51,8 +78,18 @@ namespace MM
class PageMapXpa final : public PageMap
{
public:
XTAPI PMMPTE AdvancePte(PMMPTE Pte,
ULONG Count);
XTAPI ULONG_PTR GetNextEntry(PMMPTE Pte);
XTAPI PMMPTE GetNextPte(PMMPTE Pte);
XTAPI BOOLEAN GetOneEntry(PMMPTE Pte);
XTAPI ULONG GetPteSize(VOID);
XTAPI VOID InitializePageMapInfo(VOID);
XTAPI BOOLEAN PteValid(PHARDWARE_PTE PtePointer);
XTAPI VOID SetNextEntry(PMMPTE Pte,
ULONG_PTR Value);
XTAPI VOID SetOneEntry(PMMPTE Pte,
BOOLEAN Value);
XTAPI VOID SetPte(PHARDWARE_PTE PtePointer,
PFN_NUMBER PageFrameNumber,
BOOLEAN Writable);

340
xtoskrnl/mm/amd64/pagemap.cc
View File

@@ -9,6 +9,27 @@
#include <xtos.hh>
/**
* Advances a PTE pointer by a given number of entries, considering the actual PTE size.
*
* @param Pte
* The PTE pointer to advance.
*
* @param Count
* The number of PTE entries to advance by.
*
* @return The advanced PTE pointer.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MM::PageMap::AdvancePte(PMMPTE Pte,
ULONG Count)
{
return (PMMPTE)((ULONG_PTR)Pte + (Count * sizeof(MMPTE)));
}
/**
* Clears the contents of a page table entry (PTE).
*
@@ -23,6 +44,7 @@ XTAPI
VOID
MM::PageMap::ClearPte(PHARDWARE_PTE PtePointer)
{
/* Clear PTE */
PtePointer->CacheDisable = 0;
PtePointer->PageFrameNumber = 0;
PtePointer->Valid = 0;
@@ -30,6 +52,75 @@ MM::PageMap::ClearPte(PHARDWARE_PTE PtePointer)
PtePointer->WriteThrough = 0;
}
/**
* Gets the value representing an empty PTE list.
*
* @return This routine returns the value representing an empty PTE list.
*
* @since XT 1.0
*/
XTAPI
ULONGLONG
MM::PageMap::GetEmptyPteList(VOID)
{
/* Return empty PTE list mask */
return PageMapInfo.EmptyPteList;
}
/**
* Gets the next entry in a PTE list.
*
* @param Pte
* The PTE pointer to get the next entry from.
*
* @return This routine returns the next entry in the PTE list.
*
* @since XT 1.0
*/
XTAPI
ULONG_PTR
MM::PageMap::GetNextEntry(PMMPTE Pte)
{
/* Return next entry in PTE list */
return Pte->List.NextEntry;
}
/**
* Advances a PTE pointer, considering the actual PTE size.
*
* @param Pte
* The PTE pointer to advance.
*
* @return The advanced PTE pointer.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MM::PageMap::GetNextPte(PMMPTE Pte)
{
/* Return advanced PTE pointer */
return AdvancePte(Pte, 1);
}
/**
* Checks if a PTE list contains only one entry.
*
* @param Pte
* The PTE pointer to check.
*
* @return This routine returns TRUE if the PTE list has only one entry, FALSE otherwise.
*
* @since XT 1.0
*/
XTAPI
BOOLEAN
MM::PageMap::GetOneEntry(PMMPTE Pte)
{
/* Return one entry status */
return Pte->List.OneEntry;
}
/**
* Gets the address of the P5E (Page Map Level 5 Entry), that maps given address.
*
@@ -51,6 +142,40 @@ MM::PageMap::GetP5eAddress(PVOID Address)
return (PMMP5E)((PageMapInfo.P5eBase + Offset) * PageMapInfo.Xpa);
}
/**
* Gets the index of the P5E (Page Map Level 5 Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding P5E.
*
* @return This routine returns the index of the P5E, or NULLPTR if LA57 is not enabled.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetP5eIndex(PVOID Address)
{
return (((((ULONGLONG)Address) >> MM_P5I_SHIFT) & 0x1FF) * PageMapInfo.Xpa);
}
/**
* Gets the virtual address that is mapped by a given Page Map Level 5 Entry.
*
* @param P5ePointer
* Specifies the address of the P5E.
*
* @return This routine returns the virtual address mapped by the P5E, or NULLPTR if LA57 is not enabled.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetP5eVirtualAddress(PMMP5E P5ePointer)
{
return (PVOID)((((LONGLONG)P5ePointer << 61) >> 16) * PageMapInfo.Xpa);
}
/**
* Gets the address of the PDE (Page Directory Entry), that maps given address.
*
@@ -73,11 +198,47 @@ MM::PageMap::GetPdeAddress(PVOID Address)
}
/**
* Gets the address of the PPE (Page Directory Pointer Table Entry), that maps given address.
* Gets the index of the PDE (Page Directory Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding PDE.
*
* @return This routine returns the index of the PDE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPdeIndex(PVOID Address)
{
/* Return PDE index */
return ((((ULONGLONG)Address) >> MM_PDI_SHIFT) & 0x1FF);
}
/**
* Gets the virtual address that is mapped by a given Page Directory Entry.
*
* @param PdePointer
* Specifies the address of the PDE.
*
* @return This routine returns the virtual address mapped by the PDE.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetPdeVirtualAddress(PMMPDE PdePointer)
{
/* Return PDE virtual address */
return (PVOID)(((LONGLONG)PdePointer << 34) >> 16);
}
/**
* Gets the address of the PPE (Page Directory Pointer Table Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding PPE.
*
* @return This routine returns the address of the PPE.
*
* @since XT 1.0
@@ -93,6 +254,42 @@ MM::PageMap::GetPpeAddress(PVOID Address)
return (PMMPPE)(PageMapInfo.PpeBase + Offset);
}
/**
* Gets the index of the PPE (Page Directory Pointer Table Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding PPE.
*
* @return This routine returns the index of the PPE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPpeIndex(PVOID Address)
{
/* Return PPE index */
return ((((ULONGLONG)Address) >> MM_PPI_SHIFT) & 0x1FF);
}
/**
* Gets the virtual address that is mapped by a given Page Directory Pointer Table Entry.
*
* @param PpePointer
* Specifies the address of the PPE.
*
* @return This routine returns the virtual address mapped by the PPE.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetPpeVirtualAddress(PMMPPE PpePointer)
{
/* Return PPE virtual address */
return (PVOID)(((LONGLONG)PpePointer << 43) >> 16);
}
/**
* Gets the address of the PTE (Page Table Entry), that maps given address.
*
@@ -114,6 +311,57 @@ MM::PageMap::GetPteAddress(PVOID Address)
return (PMMPTE)(PageMapInfo.PteBase + Offset);
}
/**
* Gets the index of the PTE (Page Table Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding PTE.
*
* @return This routine returns the index of the PTE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPteIndex(PVOID Address)
{
/* Return PTE index */
return ((((ULONGLONG)Address) >> MM_PTI_SHIFT) & 0x1FF);
}
/**
* Gets the size of a PTE.
*
* @return This routine returns the size of a PTE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPteSize(VOID)
{
/* Return the size of MMPTE */
return sizeof(MMPTE);
}
/**
* Gets the virtual address that is mapped by a given Page Table Entry.
*
* @param PtePointer
* Specifies the address of the PTE.
*
* @return This routine returns the virtual address mapped by the PTE.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetPteVirtualAddress(PMMPTE PtePointer)
{
/* Return PTE virtual address */
return (PVOID)(((LONGLONG)PtePointer << 25) >> 16);
}
/**
* Gets the address of the PXE (Extended Page Entry), that maps given address.
*
@@ -130,10 +378,47 @@ MM::PageMap::GetPxeAddress(PVOID Address)
{
ULONGLONG Offset;
/* Calculate offset and return PXE address */
Offset = ((((ULONGLONG)Address & (((ULONGLONG)1 << PageMapInfo.VaBits) - 1)) >> MM_PXI_SHIFT) << MM_PTE_SHIFT);
return (PMMPXE)(PageMapInfo.PxeBase + Offset);
}
/**
* Gets the index of the PXE (Extended Page Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding PXE.
*
* @return This routine returns the index of the PXE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPxeIndex(PVOID Address)
{
/* Return PXE index */
return ((((ULONGLONG)Address) >> MM_PXI_SHIFT) & 0x1FF);
}
/**
* Gets the virtual address that is mapped by a given Extended Page Entry.
*
* @param PxePointer
* Specifies the address of the PXE.
*
* @return This routine returns the virtual address mapped by the PXE.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetPxeVirtualAddress(PMMPXE PxePointer)
{
/* Return PXE virtual address */
return (PVOID)(((LONGLONG)PxePointer << 52) >> 16);
}
/**
* Checks whether the given PML2 page table entry (PTE) is valid.
*
@@ -148,9 +433,54 @@ XTAPI
BOOLEAN
MM::PageMap::PteValid(PHARDWARE_PTE PtePointer)
{
/* Check if PTE is valid */
return (BOOLEAN)PtePointer->Valid;
}
/**
* Sets the next entry in a PTE list.
*
* @param Pte
* The PTE pointer to modify.
*
* @param Value
* The value to set as the next entry.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMap::SetNextEntry(PMMPTE Pte,
ULONG_PTR Value)
{
/* Set next entry in PTE list */
Pte->List.NextEntry = Value;
}
/**
* Sets the flag indicating whether a PTE list contains only one entry.
*
* @param Pte
* The PTE pointer to modify.
*
* @param Value
* The value to set. TRUE if the list has only one entry, FALSE otherwise.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMap::SetOneEntry(PMMPTE Pte,
BOOLEAN Value)
{
/* Set one entry status */
Pte->List.OneEntry = Value;
}
/**
* Sets a PML2 page table entry (PTE) with the specified physical page and access flags.
*
@@ -173,6 +503,7 @@ MM::PageMap::SetPte(PHARDWARE_PTE PtePointer,
PFN_NUMBER PageFrameNumber,
BOOLEAN Writable)
{
/* Set PTE */
PtePointer->PageFrameNumber = PageFrameNumber;
PtePointer->Valid = 1;
PtePointer->Writable = Writable;
@@ -200,6 +531,7 @@ MM::PageMap::SetPteCaching(PHARDWARE_PTE PtePointer,
BOOLEAN CacheDisable,
BOOLEAN WriteThrough)
{
/* Set caching attributes */
PtePointer->CacheDisable = CacheDisable;
PtePointer->WriteThrough = WriteThrough;
}
@@ -218,6 +550,9 @@ MM::PageMapBasic::InitializePageMapInfo(VOID)
/* Set PML4 page map information */
PageMapInfo.Xpa = FALSE;
/* Set PML4 empty PTE list mask */
PageMapInfo.EmptyPteList = 0xFFFFFFFFUI64;
/* Set PML4 base addresses */
PageMapInfo.PteBase = MM_PTE_BASE;
PageMapInfo.PdeBase = MM_PDE_BASE;
@@ -243,6 +578,9 @@ MM::PageMapXpa::InitializePageMapInfo(VOID)
/* Set PML5 page map information */
PageMapInfo.Xpa = TRUE;
/* Set PML5 empty PTE list mask */
PageMapInfo.EmptyPteList = 0xFFFFFFFFUI64;
/* Set PML5 base addresses */
PageMapInfo.PteBase = MM_PTE_LA57_BASE;
PageMapInfo.PdeBase = MM_PDE_LA57_BASE;

411
xtoskrnl/mm/i686/pagemap.cc
View File

@@ -23,9 +23,25 @@ XTAPI
VOID
MM::PageMap::ClearPte(PHARDWARE_PTE PtePointer)
{
/* Clear PTE */
PtePointer->Long = 0;
}
/**
* Gets the value representing an empty PTE list.
*
* @return This routine returns the value representing an empty PTE list.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetEmptyPteList(VOID)
{
/* Return empty PTE list mask */
return PageMapInfo.EmptyPteList;
}
/**
* Gets the address of the PDE (Page Directory Entry), that maps given address.
*
@@ -47,6 +63,42 @@ MM::PageMap::GetPdeAddress(PVOID Address)
return (PMMPDE)(PageMapInfo.PdeBase + Offset);
}
/**
* Gets the index of the PDE (Page Directory Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding PDE.
*
* @return This routine returns the index of the PDE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPdeIndex(PVOID Address)
{
/* Return PDE index */
return ((((ULONG_PTR)(Address)) >> PageMapInfo.PdiShift) & (PageMapInfo.Xpa ? 0x1FF : 0x3FF));
}
/**
* Gets the virtual address that is mapped by a given Page Directory Entry.
*
* @param PdePointer
* Specifies the address of the PDE.
*
* @return This routine returns the virtual address mapped by the PDE.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetPdeVirtualAddress(PMMPDE PdePointer)
{
/* Return PDE virtual address */
return ((PVOID)((ULONG)(PdePointer) << 20));
}
/**
* Gets the address of the PPE (Page Directory Pointer Table Entry), that maps given address.
*
@@ -65,6 +117,42 @@ MM::PageMap::GetPpeAddress(PVOID Address)
return (PMMPPE)0;
}
/**
* Gets the index of the PPE (Page Directory Pointer Table Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding PPE.
*
* @return This routine returns the index of the PPE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPpeIndex(PVOID Address)
{
/* Return PPE index */
return ((((ULONG_PTR)(Address)) >> MM_PPI_SHIFT) & 0x3) * PageMapInfo.Xpa;
}
/**
* Gets the virtual address that is mapped by a given Page Directory Pointer Table Entry.
*
* @param PpePointer
* Specifies the virtual address of the PPE.
*
* @return This routine returns the virtual address mapped by the PPE.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetPpeVirtualAddress(PMMPPE PpePointer)
{
/* Return PPE virtual address */
return (PVOID)((ULONG)(PpePointer) << 30);
}
/**
* Gets the address of the PTE (Page Table Entry), that maps given address.
*
@@ -86,6 +174,133 @@ MM::PageMap::GetPteAddress(PVOID Address)
return (PMMPTE)(PageMapInfo.PteBase + Offset);
}
/**
* Gets the index of the PTE (Page Table Entry), that maps given address.
*
* @param Address
* Specifies the virtual address for which to retrieve the corresponding PTE.
*
* @return This routine returns the index of the PTE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPteIndex(PVOID Address)
{
/* Return PTE index */
return ((((ULONG_PTR)(Address)) >> MM_PTI_SHIFT) & (PageMapInfo.Xpa ? 0x1FF : 0x3FF));
}
/**
* Gets the virtual address that is mapped by a given Page Table Entry.
*
* @param PtePointer
* Specifies the virtual address of the PTE.
*
* @return This routine returns the virtual address mapped by the PTE.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetPteVirtualAddress(PMMPTE PtePointer)
{
/* Return PTE virtual address */
return ((PVOID)((ULONG)(PtePointer) << 10));
}
/**
* Advances a PTE pointer by a given number of entries, considering the actual PTE size for PML2.
*
* @param Pte
* The PTE pointer to advance.
*
* @param Count
* The number of PTE entries to advance by.
*
* @return This routine returns the advanced PTE pointer.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MM::PageMapBasic::AdvancePte(PMMPTE Pte,
ULONG Count)
{
/* Return advanced PTE pointer */
return (PMMPTE)((ULONG_PTR)Pte + (Count * sizeof(MMPML2_PTE)));
}
/**
* Gets the next entry in a PTE list.
*
* @param Pte
* The PTE pointer to get the next entry from.
*
* @return This routine returns the next entry in the PTE list.
*
* @since XT 1.0
*/
XTAPI
ULONG_PTR
MM::PageMapBasic::GetNextEntry(PMMPTE Pte)
{
/* Return next entry in PTE list */
return Pte->Pml2.List.NextEntry;
}
/**
* Advances a PTE pointer, considering the actual PTE size for PML2.
*
* @param Pte
* The PTE pointer to advance.
*
* @return The advanced PTE pointer.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MM::PageMapBasic::GetNextPte(PMMPTE Pte)
{
/* Return advanced PTE pointer */
return AdvancePte(Pte, 1);
}
/**
* Checks if a PTE list contains only one entry.
*
* @param Pte
* The PTE pointer to check.
*
* @return This routine returns TRUE if the PTE list has only one entry, FALSE otherwise.
*
* @since XT 1.0
*/
XTAPI
BOOLEAN
MM::PageMapBasic::GetOneEntry(PMMPTE Pte)
{
/* Return one entry status */
return Pte->Pml2.List.OneEntry;
}
/**
* Gets the size of a PTE for basic paging (PML2).
*
* @return This routine returns the size of a PTE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMapBasic::GetPteSize(VOID)
{
/* Return the size of MMPTE */
return sizeof(MMPML2_PTE);
}
/**
* Initializes page map information for basic paging (PML2).
*
@@ -100,6 +315,9 @@ MM::PageMapBasic::InitializePageMapInfo(VOID)
/* Set PML2 page map information */
PageMapInfo.Xpa = FALSE;
/* Set PML2 empty PTE list mask */
PageMapInfo.EmptyPteList = (ULONG)0xFFFFF;
/* Set PML2 base addresses */
PageMapInfo.PteBase = MM_PTE_BASE;
PageMapInfo.PdeBase = MM_PDE_LEGACY_BASE;
@@ -123,9 +341,54 @@ XTAPI
BOOLEAN
MM::PageMapBasic::PteValid(PHARDWARE_PTE PtePointer)
{
/* Check if PTE is valid */
return (BOOLEAN)PtePointer->Pml2.Valid;
}
/**
* Sets the next entry in a PTE list.
*
* @param Pte
* The PTE pointer to modify.
*
* @param Value
* The value to set as the next entry.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMapBasic::SetNextEntry(PMMPTE Pte,
ULONG_PTR Value)
{
/* Set next entry in PTE list */
Pte->Pml2.List.NextEntry = Value;
}
/**
* Sets the flag indicating whether a PTE list contains only one entry.
*
* @param Pte
* The PTE pointer to modify.
*
* @param Value
* The value to set. TRUE if the list has only one entry, FALSE otherwise.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMapBasic::SetOneEntry(PMMPTE Pte,
BOOLEAN Value)
{
/* Set one entry status */
Pte->Pml2.List.OneEntry = Value;
}
/**
* Sets a PML2 page table entry (PTE) with the specified physical page and access flags.
*
@@ -148,6 +411,7 @@ MM::PageMapBasic::SetPte(PHARDWARE_PTE PtePointer,
PFN_NUMBER PageFrameNumber,
BOOLEAN Writable)
{
/* Set PTE */
PtePointer->Pml2.PageFrameNumber = PageFrameNumber;
PtePointer->Pml2.Valid = 1;
PtePointer->Pml2.Writable = Writable;
@@ -175,10 +439,102 @@ MM::PageMapBasic::SetPteCaching(PHARDWARE_PTE PtePointer,
BOOLEAN CacheDisable,
BOOLEAN WriteThrough)
{
/* Set caching attributes */
PtePointer->Pml2.CacheDisable = CacheDisable;
PtePointer->Pml2.WriteThrough = WriteThrough;
}
/**
* Advances a PTE pointer by a given number of entries, considering the actual PTE size for PML3.
*
* @param Pte
* The PTE pointer to advance.
*
* @param Count
* The number of PTE entries to advance by.
*
* @return The advanced PTE pointer.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MM::PageMapXpa::AdvancePte(PMMPTE Pte,
ULONG Count)
{
/* Return advanced PTE pointer */
return (PMMPTE)((ULONG_PTR)Pte + (Count * sizeof(MMPML3_PTE)));
}
/**
* Gets the next entry in a PTE list.
*
* @param Pte
* The PTE pointer to get the next entry from.
*
* @return This routine returns the next entry in the PTE list.
*
* @since XT 1.0
*/
XTAPI
ULONG_PTR
MM::PageMapXpa::GetNextEntry(PMMPTE Pte)
{
/* Return next entry in PTE list */
return Pte->Pml3.List.NextEntry;
}
/**
* Advances a PTE pointer, considering the actual PTE size for PML3.
*
* @param Pte
* The PTE pointer to advance.
*
* @return The advanced PTE pointer.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MM::PageMapXpa::GetNextPte(PMMPTE Pte)
{
/* Return advanced PTE pointer */
return AdvancePte(Pte, 1);
}
/**
* Checks if a PTE list contains only one entry.
*
* @param Pte
* The PTE pointer to check.
*
* @return This routine returns TRUE if the PTE list has only one entry, FALSE otherwise.
*
* @since XT 1.0
*/
XTAPI
BOOLEAN
MM::PageMapXpa::GetOneEntry(PMMPTE Pte)
{
/* Return one entry status */
return Pte->Pml3.List.OneEntry;
}
/**
* Gets the size of a PTE for XPA paging (PML3).
*
* @return This routine returns the size of a PTE.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMapXpa::GetPteSize(VOID)
{
/* Return the size of MMPTE */
return sizeof(MMPML3_PTE);
}
/**
* Initializes page map information for basic paging (PML3).
*
@@ -190,14 +546,17 @@ XTAPI
VOID
MM::PageMapXpa::InitializePageMapInfo(VOID)
{
/* Set PML2 page map information */
/* Set PML3 page map information */
PageMapInfo.Xpa = TRUE;
/* Set PML2 base addresses */
/* Set PML3 empty PTE list mask */
PageMapInfo.EmptyPteList = (ULONG)0xFFFFFFFF;
/* Set PML3 base addresses */
PageMapInfo.PteBase = MM_PTE_BASE;
PageMapInfo.PdeBase = MM_PDE_BASE;
/* Set PML2 shift values */
/* Set PML3 shift values */
PageMapInfo.PdiShift = MM_PDI_SHIFT;
PageMapInfo.PteShift = MM_PTE_SHIFT;
}
@@ -219,6 +578,50 @@ MM::PageMapXpa::PteValid(PHARDWARE_PTE PtePointer)
return (BOOLEAN)PtePointer->Pml3.Valid;
}
/**
* Sets the next entry in a PTE list.
*
* @param Pte
* The PTE pointer to modify.
*
* @param Value
* The value to set as the next entry.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMapXpa::SetNextEntry(PMMPTE Pte,
ULONG_PTR Value)
{
/* Set next entry in PTE list */
Pte->Pml3.List.NextEntry = Value;
}
/**
* Sets the flag indicating whether a PTE list contains only one entry.
*
* @param Pte
* The PTE pointer to modify.
*
* @param Value
* The value to set. TRUE if the list has only one entry, FALSE otherwise.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMapXpa::SetOneEntry(PMMPTE Pte,
BOOLEAN Value)
{
/* Set one entry status */
Pte->Pml3.List.OneEntry = Value;
}
/**
* Sets a PML3 page table entry (PTE) with the specified physical page and access flags.
*
@@ -241,6 +644,7 @@ MM::PageMapXpa::SetPte(PHARDWARE_PTE PtePointer,
PFN_NUMBER PageFrameNumber,
BOOLEAN Writable)
{
/* Set PTE */
PtePointer->Pml3.PageFrameNumber = PageFrameNumber;
PtePointer->Pml3.Valid = 1;
PtePointer->Pml3.Writable = Writable;
@@ -268,6 +672,7 @@ MM::PageMapXpa::SetPteCaching(PHARDWARE_PTE PtePointer,
BOOLEAN CacheDisable,
BOOLEAN WriteThrough)
{
/* Set caching attributes */
PtePointer->Pml3.CacheDisable = CacheDisable;
PtePointer->Pml3.WriteThrough = WriteThrough;
}