Bad Linux RISCV Image magic!

使用星光2主板自带uboot,通过tftp方式下载和引导kernel启动,提示“Bad Linux RISCV Image magic!”
kernel和rootfs文件来自:Release VisionFive2 Software v2.6.0 · starfive-tech/VisionFive2 · GitHub
uboot中执行命令:tftpboot ${fdt_addr_r} jh7110-visionfive-v2.dtb;tftpboot ${kernel_addr_r} Image.gz;tftpboot ${ramdisk_addr_r} initramfs.cpio.gz;booti ${kernel_addr_r}${ramdisk_addr_r}:${filesize} ${fdt_addr_r}

请帮忙解答一下,谢谢;