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我的理解是PCIe启动是在PCIe接口上挂载一个msata盘，文件和sd卡的操作是一样的。可以这么理解吗？
不是的，不能从PCI-E外挂的存储设备启动。
DM816x可以作为一个EP设备，从RC设备启动。请参阅TI81XX_PSP_PCI_Express_Endpoint_Boot_Driver_User_Guide.pdf DVRRDK里面有
