[U-Boot-Users] Runtime switch from uart0 to uart1?

Greetings:

After having read the README and some code, I was wondering if there is a way to switch, at runtime (rather than at compile time) from UART0 to UART1.

The board is the ocotea, ppc440gx, u-boot 1.1.2, build tools from ELDK3

TIA,

Travis