DDR addr bus test: can't access memory @ 0xc0000004

[asadullah4571]

hi please.

NOTICE: CPU: STM32MP157DAC Rev.Z
NOTICE: Model: STMicroelectronics STM32MP157F-DK2 Discovery Board
INFO: PMIC version = 0x21
INFO: Reset reason (0x15):
INFO: Power-on Reset (rst_por)
INFO: FCONF: Reading TB_FW firmware configuration file from: 0x2ffe2000
INFO: FCONF: Reading firmware configuration information for: stm32mp_io
INFO: FCONF: Reading firmware configuration information for: stm32mp_fuse
INFO: Using SDMMC
INFO: Instance 1
INFO: Boot used partition fsbl1
NOTICE: BL2: v2.8-stm32mp1-r2.0(debug):lts-v2.8.15-dirty(567af710)
NOTICE: BL2: Built : 00:51:33, Jan 26 2024
INFO: BL2: Doing platform setup
INFO: RAM: DDR3-DDR3L 16bits 533000kHz
ERROR: DDR addr bus test: can't access memory @ 0xc0000004
PANIC at PC : 0x2ffebb4d

Exception mode=0x00000016 at: 0x2ffebb4d


even i did not change pin of the DDR with processor i used the same pin on custom board as it is like(stm32mp157f-dk2) board, and also the same RAM, 

could you please help me out this or any thing we need to change 

[liaifat85]

Even if you used the same pins as the reference board, differences in PCB layout (trace lengths, impedance, crosstalk, etc.) can affect signal integrity, leading to issues during DDR initialization.

[asadullah4571]

so how i can manage this one where i need to modify , i am a fresher for this one please help me this project. 
so where i need to modify the code , please 
i am waiting for your response