startup of uclinux paused

The startup information of uclinux is paused at:

Serial: JTAG UART driver $Revision: 1.3 $

ttyJ0 at MMIO 0x806810f0 (irq = 1) is a jtag_uart

(the next information will be dm9000a's )

set 2 jtag in SOPCBuilder, each connected to one cpu.

what should I do?