+\r
+/**\r
+ Debug Port Driver entry point. \r
+\r
+ Checks to see there's not already a DebugSupport protocol installed for \r
+ the selected processor before installing protocol.\r
+\r
+ @param[in] ImageHandle The firmware allocated handle for the EFI image. \r
+ @param[in] SystemTable A pointer to the EFI System Table.\r
+ \r
+ @retval EFI_SUCCESS The entry point is executed successfully.\r
+ @retval EFI_ALREADY_STARTED DebugSupport protocol is installed already.\r
+ @retval other Some error occurs when executing this entry point.\r
+\r
+**/\r