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4dsp pcie swith port口的配置寄存器映射



我现在手头在配一个4dsp的板子,4dsp之间通过plx 8624的switch交换连接,在枚举的时候遇到问题。我把8624的type1 的bar0地址配成0XD0000000,按照手册上描述bar0配置后所有port口的寄存器会映射到bar0配置的地址处,这样就可以通过该地址操作port寄存器,现在我配过这个bar0后发现,在0XD0000000地址处的值并不是port寄存器的映射值。有哪位高人能指导一下大概原因是处在什么地方不?