If you have enabled the serial port on the bcm63xx CPU
you can make it the console by answering Y to this option.
+config SERIAL_GRLIB_GAISLER_APBUART
+ tristate "GRLIB APBUART serial support"
+ depends on OF
+ ---help---
+ Add support for the GRLIB APBUART serial port.
+
+config SERIAL_GRLIB_GAISLER_APBUART_CONSOLE
+ bool "Console on GRLIB APBUART serial port"
+ depends on SERIAL_GRLIB_GAISLER_APBUART=y
+ select SERIAL_CORE_CONSOLE
+ help
+ Support for running a console on the GRLIB APBUART
+
endmenu