Split paging interface into arch-specific code

xtoskrnl/mm/amd64/paging.cc

@@ -25,6 +25,78 @@ MM::Paging::GetExtendedPhysicalAddressingStatus(VOID)
     return ((AR::CpuFunc::ReadControlRegister(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 NULLPTR if LA57 is not enabled.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PMMPDE
+MM::Paging::GetP5eAddress(IN PVOID Address)
+{
+    /* Return PDE address */
+    return PmlRoutines->GetP5eAddress(Address);
+}
+
+/**
+ * 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::Paging::GetP5eVirtualAddress(IN PMMPTE P5ePointer)
+{
+    /* Return PTE virtual address */
+    return PmlRoutines->GetP5eVirtualAddress(P5ePointer);
+}
+
+/**
+ * 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
+MM::Paging::GetPxeAddress(IN PVOID Address)
+{
+    /* Return PXE address */
+    return PmlRoutines->GetPxeAddress(Address);
+}
+
+/**
+ * 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::Paging::GetPxeVirtualAddress(IN PMMPXE PxePointer)
+{
+    /* Return PXE virtual address */
+    return PmlRoutines->GetPxeVirtualAddress(PxePointer);
+}
+
 /**
  * Fills a section of memory with zeroes like RtlZeroMemory(), but in more efficient way.
  *

xtoskrnl/mm/paging.cc

@@ -170,42 +170,6 @@ MM::Paging::GetOneEntry(IN PMMPTE Pte)
     return PmlRoutines->GetOneEntry(Pte);
 }
 
-/**
- * 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 NULLPTR if LA57 is not enabled.
- *
- * @since XT 1.0
- */
-XTAPI
-PMMPDE
-MM::Paging::GetP5eAddress(IN PVOID Address)
-{
-    /* Return PDE address */
-    return PmlRoutines->GetP5eAddress(Address);
-}
-
-/**
- * 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::Paging::GetP5eVirtualAddress(IN PMMPTE P5ePointer)
-{
-    /* Return PTE virtual address */
-    return PmlRoutines->GetP5eVirtualAddress(P5ePointer);
-}
-
 /**
  * Gets the page frame number from a corresponding PTE.
  *
@@ -240,6 +204,20 @@ MM::Paging::GetPageMapBasicRoutines(VOID)
     return &PageMapBasicRoutines;
 }
 
+/**
+ * Gets the current paging mode level.
+ *
+ * @return This routine returns 5 if 5-level paging (XPA) is enabled, otherwise 4 for 4-level paging.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+USHORT
+MM::Paging::GetPageMapLevel()
+{
+    return PmlRoutines->GetXpaStatus() ? 5 : 4;
+}
+
 /**
  * Gets the page map routines for eXtended Physical Addressing (XPA) mode.
  *
@@ -380,56 +358,6 @@ MM::Paging::GetPteVirtualAddress(IN PMMPTE PtePointer)
     return PmlRoutines->GetPteVirtualAddress(PtePointer);
 }
 
-/**
- * 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
-MM::Paging::GetPxeAddress(IN PVOID Address)
-{
-    /* Return PXE address */
-    return PmlRoutines->GetPxeAddress(Address);
-}
-
-/**
- * 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::Paging::GetPxeVirtualAddress(IN PMMPXE PxePointer)
-{
-    /* Return PXE virtual address */
-    return PmlRoutines->GetPxeVirtualAddress(PxePointer);
-}
-
-/**
- * Gets the status of Extended Paging Address (XPA) mode.
- *
- * @return This routine returns TRUE if XPA is enabled, FALSE otherwise.
- *
- * @since XT 1.0
- */
-XTAPI
-BOOLEAN
-MM::Paging::GetXpaStatus()
-{
-    return PmlRoutines->GetXpaStatus();
-}
-
 /**
  * Detects if eXtended Physical Addressing (XPA) is enabled and initializes page map support.
  *