用户您好，请详细描述您所遇到的问题。
现象：金脉MADC2的单j5的板子，现在换了一颗CY的nor flash，修改了uboot，从emmc启动在uboot阶段可以进行sf probe，sf read，sf write，另外重新编译了uboot（uboot下./build.sh -o nor）,在BSP/build/下make，编译生成了disk_nor-secure.img，通过tftp和sf write的方式，烧写了disk_nor-secure.img到nor中，切换启动方式为nor启动，发现在spl部分报错如下，不能启动到uboot。
请问，spl部分镜像是否是预编译好的，没有开放源码？这个报错是否和spl部分代码有关？或者是否是spl和uboot之间的nor flash有一个什么转换操作，比如单线到8线SPI的一个转换等其他原因?
1.硬件获取渠道：金脉MADC2单J5板子
2.当前系统镜像版本：cs版本
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