[U-Boot] u-boot: raspberry pi 4 with 4G ram, bdinfo: dram bank size is < 1G

With top of the tree(tot) uboot, and tot firmware, uboot command bdinfo shows the dram bank size as 0x000000003b400000 which is <1G, but the rpi4 board has 4G of ram.

However with kernel8.img in the firmware, linux kernel shows in /proc/meminfo

cat /proc/meminfo

MemTotal:3999784 kB

MemFree: 3868044 kB

MemAvailable:3819600 kB

Does this current uboot does not yet support rpi with 4g ram?

-Thanks