它具有一个集成的内存管理单元，通常使用与PPE类似的页表查询机制来提供对某个进程地址空间的访问。
It has an integrated memory management unit that is normally used to provide access to the address space of one process by using the same page table lookup as the PPE.
一个例子是Linux可以在一个具有内存管理单元(MMU)的处理器上运行，也可以在那些不提供MMU的处理器上运行。
One example is the ability for Linux to run on a process with a memory management unit (MMU), as well as those that provide no MMU.
具体来说，系统没有一个可以支持虚拟内存的内存管理单元。
On the extreme end, ports like uClinux and ELKS target processors that are "too small" for regular Linux; in particular, systems without a memory-management unit that can support virtual memory.
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