Prepare for architecture-specific paging initialization

xtoskrnl/mm/amd64/init.c

@@ -9,6 +9,20 @@
 #include <xtos.h>
 
 
+/**
+ * Detects if eXtended Physical Addressing (XPA) is enabled and initializes page map support.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+MmInitializePageMapSupport(VOID)
+{
+    UNIMPLEMENTED;
+}
+
 /**
  * Gets the address of the PDE (Page Directory Entry), that maps given address.
  *
@@ -102,18 +116,3 @@ MmpInitializeArchitecture(VOID)
 {
     UNIMPLEMENTED;
 }
-
-/**
- * Checks if LA57 (PML5) is enabled.
- *
- * @return This routine returns TRUE if LA57 is enabled, or FALSE otherwise.
- *
- * @since XT 1.0
- */
-XTAPI
-BOOLEAN
-MmpMemoryExtensionEnabled(VOID)
-{
-    /* Check if LA57 (PML5) is enabled */
-    return ((ArReadControlRegister(4) & CR4_LA57) != 0) ? TRUE : FALSE;
-}