+/**\r
+ Prevent the memory pages used for page table from been overwritten.\r
+\r
+ @param[in] PageTableBase Base address of page table (CR3).\r
+ @param[in] Level4Paging Level 4 paging flag.\r
+\r
+**/\r
+VOID\r
+EnablePageTableProtection (\r
+ IN UINTN PageTableBase,\r
+ IN BOOLEAN Level4Paging\r
+ );\r
+\r
+/**\r
+ This API provides a way to allocate memory for page table.\r
+\r
+ This API can be called more than once to allocate memory for page tables.\r
+\r
+ Allocates the number of 4KB pages and returns a pointer to the allocated\r
+ buffer. The buffer returned is aligned on a 4KB boundary.\r
+\r
+ If Pages is 0, then NULL is returned.\r
+ If there is not enough memory remaining to satisfy the request, then NULL is\r
+ returned.\r
+\r
+ @param Pages The number of 4 KB pages to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+AllocatePageTableMemory (\r
+ IN UINTN Pages\r
+ );\r
+\r