First of all thank you for your reference code.
According to the corresponding code, I have achieved some function about port settings, data transmission in BSC9132.
While, I have some problems about UART reading function based on your program, the serial interrupt has not been able to achieve.
Through debugging: ASM ("ori R3, r3,0x8000 \n\t");
error reporting: Unsupported relocation against R3; always do not know how it is.