When the ppe wants to access the mailbox, it needs to have access to the memory-mapped register space, which is normally only available to kernel space.
当PPE希望访问邮箱时，它需要能够访问内存映射的寄存器空间，后者通常只对于内核空间来说是可用的。
Regions in a process's virtual address space can be mapped to physical memory, to a file, or to any other addressable storage.
进程的虚拟地址空间中的区域可被映射到物理内存、文件或任何其他可寻址存储。
Figure 1 illustrates how virtual pages in a process's address space are mapped to physical page frames in memory.
图1说明了进程地址空间中的虚拟页如何映射到内存中的物理页帧。
An access violation means that somewhere, your code tried to access (read, in this case) memory that's not mapped to your program's address space.
代码访问违反意味着某个地方，试图访问(读，在这种情况下)内存不是映射到程序的地址空间。
An access violation means that somewhere, your code tried to access (read, in this case) memory that's not mapped to your program's address space.
代码访问违反意味着某个地方，试图访问(读，在这种情况下)内存不是映射到程序的地址空间。
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