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按照我的理解，多端口的可以同时支持不同host访问，单端口只能等待仲裁；比如CPU 和EDMA同时访问L1D不同数据块的时候，会不会产生冲突，如果是冲突之后按照什么仲裁机制来安排先后顺序的？
带宽管理与仲裁请看http://www.ti.com/litv/pdf/sprugw0b第8章
