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6678 DDR3 写地址0x80000000~0xB0000000,会同时写0xC0000000~0xF0000000,请高手指教!

大家好!

自己的2C6678板卡,每片外挂2GB的DDR3,现在遇到一个问题,写地址0x80000000~0xB0000000,会同时写0xC0000000~0xF0000000,好像两个区间相互映射了一样,请问有没有遇到过这个问题的,如何解决?谢谢!