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Refactor PageMap to enable architecture-specific VA translation

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This commit is contained in:
Aiken Harris
2025-11-29 23:37:08 +01:00
parent c099882866
commit 931586eebd
2 changed files with 169 additions and 74 deletions
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27
xtoskrnl/includes/mm/amd64/pagemap.hh
View File

@@ -1,13 +1,13 @@
/**
* PROJECT: ExectOS
* COPYRIGHT: See COPYING.md in the top level directory
* FILE: xtoskrnl/includes/mm/pagemap.hh
* FILE: xtoskrnl/includes/mm/amd64/pagemap.hh
* DESCRIPTION: Low-level support for page map manipulation
* DEVELOPERS: Aiken Harris <harraiken91@gmail.com>
*/
#ifndef __XTOSKRNL_MM_PAGEMAP_HH
#define __XTOSKRNL_MM_PAGEMAP_HH
#ifndef __XTOSKRNL_MM_AMD64_PAGEMAP_HH
#define __XTOSKRNL_MM_AMD64_PAGEMAP_HH
#include <xtos.hh>
@@ -22,7 +22,7 @@ namespace MM
public:
XTAPI PMMPTE AdvancePte(IN PMMPTE Pte,
IN ULONG Count);
IN LONG Count);
XTAPI VOID ClearPte(IN PMMPTE PtePointer);
XTAPI ULONGLONG GetEmptyPteList(VOID);
XTAPI ULONG_PTR GetNextEntry(IN PMMPTE Pte);
@@ -34,17 +34,18 @@ namespace MM
XTAPI PFN_NUMBER GetPageFrameNumber(IN PMMPTE Pte);
XTAPI PMMPDE GetPdeAddress(IN PVOID Address);
XTAPI ULONG GetPdeIndex(IN PVOID Address);
XTAPI PVOID GetPdeVirtualAddress(IN PMMPDE PdePointer);
VIRTUAL XTAPI PVOID GetPdeVirtualAddress(IN PMMPDE PdePointer) = 0;
XTAPI PMMPPE GetPpeAddress(IN PVOID Address);
XTAPI ULONG GetPpeIndex(IN PVOID Address);
XTAPI PVOID GetPpeVirtualAddress(IN PMMPPE PpePointer);
VIRTUAL XTAPI PVOID GetPpeVirtualAddress(IN PMMPPE PpePointer) = 0;
XTAPI PMMPTE GetPteAddress(IN PVOID Address);
XTAPI ULONG GetPteIndex(IN PVOID Address);
XTAPI ULONG GetPteSize(VOID);
XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
VIRTUAL XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer) = 0;
XTAPI PMMPXE GetPxeAddress(IN PVOID Address);
XTAPI ULONG GetPxeIndex(IN PVOID Address);
XTAPI PVOID GetPxeVirtualAddress(IN PMMPXE PxePointer);
VIRTUAL XTAPI PVOID GetPxeVirtualAddress(IN PMMPXE PxePointer) = 0;
XTAPI BOOLEAN GetXpaStatus();
VIRTUAL XTAPI VOID InitializePageMapInfo(VOID) = 0;
XTAPI BOOLEAN PteValid(IN PMMPTE PtePointer);
XTAPI VOID SetNextEntry(IN PMMPTE Pte,
@@ -62,14 +63,22 @@ namespace MM
class PageMapBasic final : public PageMap
{
public:
XTAPI PVOID GetPdeVirtualAddress(IN PMMPDE PdePointer);
XTAPI PVOID GetPpeVirtualAddress(IN PMMPPE PpePointer);
XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
XTAPI PVOID GetPxeVirtualAddress(IN PMMPXE PxePointer);
XTAPI VOID InitializePageMapInfo(VOID);
};
class PageMapXpa final : public PageMap
{
public:
XTAPI PVOID GetPdeVirtualAddress(IN PMMPDE PdePointer);
XTAPI PVOID GetPpeVirtualAddress(IN PMMPPE PpePointer);
XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
XTAPI PVOID GetPxeVirtualAddress(IN PMMPXE PxePointer);
XTAPI VOID InitializePageMapInfo(VOID);
};
}
#endif /* __XTOSKRNL_MM_PAGEMAP_HH */
#endif /* __XTOSKRNL_MM_AMD64_PAGEMAP_HH */

216
xtoskrnl/mm/amd64/pagemap.cc
View File

@@ -25,7 +25,7 @@
XTAPI
PMMPTE
MM::PageMap::AdvancePte(IN PMMPTE Pte,
IN ULONG Count)
IN LONG Count)
{
/* Return advanced PTE pointer */
return (PMMPTE)((ULONG_PTR)Pte + (Count * sizeof(MMPTE)));
@@ -170,7 +170,7 @@ XTAPI
PVOID
MM::PageMap::GetP5eVirtualAddress(IN PMMP5E P5ePointer)
{
return (PVOID)((((LONGLONG)P5ePointer << 61) >> 16) * PageMapInfo.Xpa);
return (PVOID)((((LONGLONG)P5ePointer << 52) >> 7) * PageMapInfo.Xpa);
}
/**
@@ -229,24 +229,6 @@ MM::PageMap::GetPdeIndex(IN PVOID Address)
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(IN 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.
*
@@ -286,24 +268,6 @@ MM::PageMap::GetPpeIndex(IN PVOID Address)
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(IN 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.
*
@@ -358,24 +322,6 @@ MM::PageMap::GetPteSize(VOID)
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(IN 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.
*
@@ -416,21 +362,17 @@ MM::PageMap::GetPxeIndex(IN PVOID Address)
}
/**
* Gets the virtual address that is mapped by a given Extended Page Entry.
* Gets the status of Extended Paging Address (XPA) mode.
*
* @param PxePointer
* Specifies the address of the PXE.
*
* @return This routine returns the virtual address mapped by the PXE.
* @return This routine returns TRUE if XPA is enabled, FALSE otherwise.
*
* @since XT 1.0
*/
XTAPI
PVOID
MM::PageMap::GetPxeVirtualAddress(IN PMMPXE PxePointer)
BOOLEAN
MM::PageMap::GetXpaStatus()
{
/* Return PXE virtual address */
return (PVOID)(((LONGLONG)PxePointer << 52) >> 16);
return PageMapInfo.Xpa;
}
/**
@@ -550,6 +492,78 @@ MM::PageMap::SetPteCaching(IN PMMPTE PtePointer,
PtePointer->Hardware.WriteThrough = WriteThrough;
}
/**
* Gets the virtual address that is mapped by a given Page Directory Entry (PML4).
*
* @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::PageMapBasic::GetPdeVirtualAddress(IN PMMPDE PdePointer)
{
/* Return PDE virtual address */
return (PVOID)(((LONGLONG)PdePointer << 34) >> 16);
}
/**
* Gets the virtual address that is mapped by a given Page Directory Pointer Table Entry (PML4).
*
* @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::PageMapBasic::GetPpeVirtualAddress(IN PMMPPE PpePointer)
{
/* Return PPE virtual address */
return (PVOID)(((LONGLONG)PpePointer << 43) >> 16);
}
/**
* Gets the virtual address that is mapped by a given Page Table Entry (PML4).
*
* @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::PageMapBasic::GetPteVirtualAddress(IN PMMPTE PtePointer)
{
/* Return PTE virtual address */
return (PVOID)(((LONGLONG)PtePointer << 25) >> 16);
}
/**
* Gets the virtual address that is mapped by a given Extended Page Entry (PML4).
*
* @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::PageMapBasic::GetPxeVirtualAddress(IN PMMPXE PxePointer)
{
/* Return PXE virtual address */
return (PVOID)(((LONGLONG)PxePointer << 52) >> 16);
}
/**
* Initializes page map information for basic paging (PML4).
*
@@ -578,6 +592,78 @@ MM::PageMapBasic::InitializePageMapInfo(VOID)
PageMapInfo.VaBits = 48;
}
/**
* Gets the virtual address that is mapped by a given Page Directory Entry (PML5).
*
* @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::PageMapXpa::GetPdeVirtualAddress(IN PMMPDE PdePointer)
{
/* Return PDE virtual address */
return (PVOID)(((LONGLONG)PdePointer << 25) >> 7);
}
/**
* Gets the virtual address that is mapped by a given Page Directory Pointer Table Entry (PML5).
*
* @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::PageMapXpa::GetPpeVirtualAddress(IN PMMPPE PpePointer)
{
/* Return PPE virtual address */
return (PVOID)(((LONGLONG)PpePointer << 34) >> 7);
}
/**
* Gets the virtual address that is mapped by a given Page Table Entry (PML5).
*
* @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::PageMapXpa::GetPteVirtualAddress(IN PMMPTE PtePointer)
{
/* Return PTE virtual address */
return (PVOID)(((LONGLONG)PtePointer << 16) >> 7);
}
/**
* Gets the virtual address that is mapped by a given Extended Page Entry (PML5).
*
* @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::PageMapXpa::GetPxeVirtualAddress(IN PMMPXE PxePointer)
{
/* Return PXE virtual address */
return (PVOID)(((LONGLONG)PxePointer << 43) >> 7);
}
/**
* Initializes page map information for XPA paging (PML5).
*