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使用DSP/BIOS系统，CCS5.5开发环境。cache配置如下图。如果启动EDMA把数据从L3RAM中搬运到DDR中，然后需要进行cache维护吗？怎么维护？如果不使能DDR区域cache的话数据就没问题。
系统MEM配置
DDR存储区配置
没有开L2，只开了L1
如果用EDMA从L3搬到DDR，需要做一个L1D的CACHE INVALIDATE
