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The VideoCore mailbox GET_ARM_MEMORY only reports the size of the first accessible memory region (~947 MiB on RPi4 with 8GB), not the total RAM. This causes U-Boot to display "DRAM: 947 MiB (total 7.9 GiB)" instead of "DRAM: 7.9 GiB". On Raspberry Pi 4 with 8GB RAM, the memory is split across multiple non-contiguous banks. The dram_init() function only sets gd->ram_size to the first bank size reported by the VideoCore firmware, while fdtdec_setup_memory_banksize() correctly populates all memory banks from the device tree. Fix this by updating gd->ram_size after dram_init_banksize() has populated all memory banks, so it reflects the actual total RAM across all banks. Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Reviewed-by: Peter Robinson <pbrobinson@gmail.com>