shared Uart between two cores of C6657

hi sirs,

I am trying to run different *.out file on core0 and core1 of C6657 via RBL pcie boot. And then Core 0 send "Core 0 boot form PCIe..." when it is running via Uart.  And Core 1 send "Core 1 boot from Core 0..." when it is running via Uart too.  But I could not get Core 1's message via Uart.

My question is why Core 1 could not use Uart  when Uart is initialized on Core 0.

Thank you in advance.

Regards,

Bai