How to use FIFOed Avalon Uart under uClinux on DE2 2c35 Board?

here the script of fifoed_avalon_uart. It seems that this script is not implemented

package fifoed_avalon_uart;
use base qw(BasicModule);
use strict;
sub required_module_names {
	("uart0", "uart1", "uart2", "uart3")
}
sub required_class_name {
        "fifoed_avalon_uart";
}
sub base_address_cast {
	"void "
}
sub translate {
	my $class = shift;
	my ($system, $required_module_name, $module_name) = @_;
	$class->SUPER::translate (@_);
        if (defined ($fifoed_avalon_uart::default_uart)) {
                print "/* The default uart is always the first one found in the PTF file */\n";
                print "#define nasys_printf_uart na_$required_module_name\n\n";
                $fifoed_avalon_uart::default_uart = $required_module_name;
        }
}
sub run {
        fifoed_avalon_uart->run2 (@_);
}
1;