setup_8250_early_printk_port
setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0);
setup_8250_early_printk_port(CKSEG1ADDR(0x1c800000), 0, 0);
setup_8250_early_printk_port(UART_BASE, UART_REG_SHIFT, 0);
setup_8250_early_printk_port((unsigned long)uart_base, 2, 50000);
extern void setup_8250_early_printk_port(unsigned long base,
setup_8250_early_printk_port(_loongson_uart_base, 0, 1024);
setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE), 0, 1024);
setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);