Freebsd-CURRENT has supported Raspberry Pi since November 2012 and Raspberry Pi 2 since March 2015, RaspBSD will support the Pi models B and B+. As Raspberry Pi is a full fledged ARM system, FreeBSD/ARM is contributing to the list of the third-party operating systems which support Raspberry Pi. The new OS is not a stable release, users may face some problems with network throughput, DMA, some packages not compile-able and High speed SD CARD issue to name some.
Source: https://thehackernews.com/2015/08/freebsd-distribution-raspberry-pi.html