The board provides a JLink adapter which is exposed as /dev/ttyACMx on Linux. STDIO UART is available on this port
cpu/$(CPU)/Makefile.features and cpu/$(CPU)/Makefile.dep are automatically included Part of moving CPU/CPU_MODEL definition to Makefile.features to have it available before Makefile.include.
Initial support for HiFive1B board with FE310_G002 CPU