The DDR controller configuration in the default LS1043ARDB project is for LS1043ARDB only, these parameters are not suitable for your custom board. So the bare board hello world program cannot run on your custom board without customize DDR controller configuration parameters.
Please run diagnostics task in CodeWarrior IDE to check whether it is possible to access OCRAM.
First, please enable hard-coded RCW through JTAG.
Please open CodeWarrior IDE from C:\Freescale\CW4NET_v2020.06\CW_ARMv8\fsl_eclipse.bat. in "Target Connections" panel, please right click "LS1043A_RDB" to duplicate it to generate LS1043A_RDB(1), double click it to open "Target Initialization File" panel to do the following modification and click "File->Save" to save the modification.
USE_SAFE_RCW = False
=>
USE_SAFE_RCW = True
Then click "Diagnose Connection" icon(marked in read in the attached screenshot) to connect to the target board to do testing.