AM62A7: When the device tree is configured with 1G of memory, but the free -m command only shows around 372M available

Part Number: AM62A7

Tool/software:

Background of the Issue:sdk:ti-processor-sdk-linux-edgeai-am62axx-evm-09_02_00_05  

The device tree allocates 1G of memory, but actually, when checked through commands, only 372M is available.

Device Tree file for k3-am62a7-sk.dts:

The display on the board shows that the memtotal is only 372MB.

How can I configure the device tree to ensure that the full 1G of memory is displayed?