def METHOD_NAME(self):
    # Keep the lower 128MBs for SoC IOs auto-allocation.
    return {
        "csr"      : 0x5800_0000,
        "rom"      : 0x7000_0000,
        "sram"     : 0x7100_0000,
        "main_ram" : 0x8000_0000,
    }