Prepare for architecture-specific paging initialization

xtoskrnl/mm/i686/pmap.c

@@ -0,0 +1,25 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/mm/i686/pmap.c
+ * DESCRIPTION:     Low-level support for i686 page map manipulation
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtos.h>
+
+
+/**
+ * Checks if eXtended Physical Addressing (XPA) is enabled.
+ *
+ * @return This routine returns TRUE if PAE is enabled, or FALSE otherwise.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+BOOLEAN
+MmpGetExtendedPhysicalAddressingStatus(VOID)
+{
+    /* Check if PAE is enabled */
+    return ((ArReadControlRegister(4) & CR4_PAE) != 0) ? TRUE : FALSE;
+}