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你能 mmap (user) 和 ioremap_nocache (kernal) 相同的物理地址说 fpga 吗?
是的 。mmap 将设备地址映射到用户空间,ioremap 将设备地址映射到内核虚拟地址。两个返回地址最终都会指向同一个设备地址。