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想通过DMA把GPMC映射的那部分内存给读出来，但不知道从而下手。希望做过的人推荐点资料或者告诉一下内核中的那部分代码有相类似的内容。
可以再starterware里面找找例子http://processors.wiki.ti.com/index.php/Category:StarterWare
