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多谢回复，我查“keystone architecture serial rapidio users guide”手册上，发现上面说支持“out-going atomic”操作，不支持“destination support of rapidio atomic”操作。然后下面有一章节解释说“Target atomic operation including increment ,decrement…are not supported for internal l2memory or registers. Atomic request operation to external devices are supported.”不是很懂这里的解释，是不是说必须得跨dsp才行？？
