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关于gpmc地址疑惑

大神 您好 oe有输出信号,we有输出信号,但cs1一直为高.这是怎么回事

在dts里 ranges 属性 ranges<1 0 0x09000000 0x01000000>这个0x09000000到底是什么地址 是物理地址还是虚拟地址 它和 mem_base = 0x09000000

fpga_base = ioremap(mem_base,SZ_4M) 中的mem_base是一致的吗