Hello Wei Yang,
1. Please select "Apply Address offset" and specify the u-boot location in the flash programming task configuration panel. You could refer to the document Flash Programmer for CodeWarrior Power Architecture .
2. Have you modified DDR controller configuration in CW configuration file according to your target board? Please create a sample "Downlaod" CodeWarrior project for MPC8309 demo board, and configure the initialization file as yours from Run->Debug Configuration-><project>-core00_RAM_8309_Download->Edit->Edit->Initialization, then verify whether this sample program can be executed on your target board successfully.
3. Have you modified the local bus configuration section in CW initialization file according to your target board?
Have a great day,
Yiping
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