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Relocate page mapping helpers and add PML5 support

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This commit is contained in:
Aiken Harris
2025-08-16 21:07:54 +02:00
parent de2973ac42
commit 0ed59f223c
6 changed files with 168 additions and 125 deletions
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80
xtoskrnl/mm/amd64/init.c
View File

@@ -47,86 +47,6 @@ MmInitializePageMapSupport(VOID)
}
}
/**
* Gets the address of the PDE (Page Directory Entry), that maps given address.
*
* @param Address
* Specifies the address to find the PDE for.
*
* @return This routine returns the address of the PDE.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MmpGetPdeAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = ((((ULONGLONG)Address & (((ULONGLONG)1 << 48) - 1)) >> MM_PDI_SHIFT) << MM_PTE_SHIFT);
return (PMMPTE)(MM_PDE_BASE + Offset);
}
/**
* Gets the address of the PPE (Page Directory Pointer Table Entry), that maps given address.
*
* @param Address
* Specifies the address to find the PPE for.
*
* @return This routine returns the address of the PPE.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MmpGetPpeAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = ((((ULONGLONG)Address & (((ULONGLONG)1 << 48) - 1)) >> MM_PPI_SHIFT) << MM_PTE_SHIFT);
return (PMMPTE)(MM_PPE_BASE + Offset);
}
/**
* Gets the address of the PTE (Page Table Entry), that maps given address.
*
* @param Address
* Specifies the address to find the PTE for.
*
* @return This routine returns the address of the PTE.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MmpGetPteAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = ((((ULONGLONG)Address & (((ULONGLONG)1 << 48) - 1)) >> MM_PTI_SHIFT) << MM_PTE_SHIFT);
return (PMMPTE)(MM_PTE_BASE + Offset);
}
/**
* Gets the address of the PXE (Extended Page Entry), that maps given address.
*
* @param Address
* Specifies the address to find the PXE for.
*
* @return This routine returns the address of the PXE.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MmpGetPxeAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = (((ULONGLONG)Address >> MM_PXI_SHIFT) & (MM_PXE_PER_PAGE - 1));
return (PMMPTE)(MM_PXE_BASE + Offset);
}
/**
* Performs architecture specific initialization of the XTOS Memory Manager.
*

100
xtoskrnl/mm/amd64/pmap.c
View File

@@ -23,3 +23,103 @@ MmpGetExtendedPhysicalAddressingStatus(VOID)
/* Check if LA57 is enabled */
return ((ArReadControlRegister(4) & CR4_LA57) != 0) ? TRUE : FALSE;
}
/**
* Gets the address 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 address of the P5E, or NULL if LA57 is not enabled.
*
* @since XT 1.0
*/
XTAPI
PMMP5E
MmpGetP5eAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = (((ULONGLONG)Address >> MM_P5I_SHIFT) << MM_PTE_SHIFT);
return (PMMP5E)((MmpPageMapInfo.P5eBase + Offset) * MmpPageMapInfo.Xpa);
}
/**
* Gets the address 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 address of the PDE.
*
* @since XT 1.0
*/
XTAPI
PMMPDE
MmpGetPdeAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = (((ULONGLONG)Address >> MM_PDI_SHIFT) << MM_PTE_SHIFT);
return (PMMPDE)(MmpPageMapInfo.PdeBase + Offset);
}
/**
* 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
*/
XTAPI
PMMPPE
MmpGetPpeAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = (((ULONGLONG)Address >> MM_PPI_SHIFT) << MM_PTE_SHIFT);
return (PMMPPE)(MmpPageMapInfo.PpeBase + Offset);
}
/**
* Gets the address 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 address of the PTE.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MmpGetPteAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = (((ULONGLONG)Address >> MM_PTI_SHIFT) << MM_PTE_SHIFT);
return (PMMPTE)(MmpPageMapInfo.PteBase + Offset);
}
/**
* Gets the address 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 address of the PXE.
*
* @since XT 1.0
*/
XTAPI
PMMPXE
MmpGetPxeAddress(PVOID Address)
{
ULONGLONG Offset;
Offset = (((ULONGLONG)Address >> MM_PXI_SHIFT) << MM_PTE_SHIFT);
return (PMMPXE)(MmpPageMapInfo.PxeBase + Offset);
}

42
xtoskrnl/mm/i686/init.c
View File

@@ -49,48 +49,6 @@ MmInitializePageMapSupport(VOID)
}
}
/**
* Gets the address of the PDE (Page Directory Entry), that maps given address.
*
* @param Address
* Specifies the address to find the PDE for.
*
* @return This routine returns the address of the PDE.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MmpGetPdeAddress(PVOID Address)
{
ULONG Offset;
/* Calculate offset and return PTE address */
Offset = ((((ULONG)(Address)) >> MM_PDI_SHIFT) << MM_PTE_SHIFT);
return (PMMPTE)(MM_PDE_BASE + Offset);
}
/**
* Gets the address of the PTE (Page Table Entry), that maps given address.
*
* @param Address
* Specifies the address to find the PTE for.
*
* @return This routine returns the address of the PTE.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MmpGetPteAddress(PVOID Address)
{
ULONG Offset;
/* Calculate offset and return PTE address */
Offset = ((((ULONG)(Address)) >> MM_PTI_SHIFT) << MM_PTE_SHIFT);
return (PMMPTE)(MM_PTE_BASE + Offset);
}
/**
* Performs architecture specific initialization of the XTOS Memory Manager.
*

60
xtoskrnl/mm/i686/pmap.c
View File

@@ -23,3 +23,63 @@ MmpGetExtendedPhysicalAddressingStatus(VOID)
/* Check if PAE is enabled */
return ((ArReadControlRegister(4) & CR4_PAE) != 0) ? TRUE : FALSE;
}
/**
* Gets the address 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 address of the PDE.
*
* @since XT 1.0
*/
XTAPI
PMMPDE
MmpGetPdeAddress(PVOID Address)
{
ULONG Offset;
/* Calculate offset and return PTE address */
Offset = ((((ULONG)(Address)) >> MmpPageMapInfo.PdiShift) << MmpPageMapInfo.PteShift);
return (PMMPTE)(MmpPageMapInfo.PdeBase + Offset);
}
/**
* 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 PDE.
*
* @return This routine returns the address of the PPE.
*
* @since XT 1.0
*/
XTAPI
PMMPPE
MmpGetPpeAddress(PVOID Address)
{
/* Return zero */
return 0;
}
/**
* Gets the address 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 address of the PTE.
*
* @since XT 1.0
*/
XTAPI
PMMPTE
MmpGetPteAddress(PVOID Address)
{
ULONG Offset;
/* Calculate offset and return PTE address */
Offset = ((((ULONG)(Address)) >> MM_PTI_SHIFT) << MmpPageMapInfo.PteShift);
return (PMMPTE)(MM_PTE_BASE + Offset);
}