Unfortunately this is not possible and with a high certainity never will be. Regardless on whether the bootloader is locked or not, no port is possible for a device which has undocumented HW. Ports to Android-based devices are easy because there is existing linux kernel with working HW adaptation. Same goes for N900 and N9. For all Ashas and Lumias, as well as for example iOS and BB devices this is not possible, ever.