MIPS R4000 Microprocessor User's Manual 293
System Interface
12
The System interface allows the processor to access external resources
needed to satisfy cache misses and uncached operations, while permitting
an external agent access to some of the processor internal resources.
In the R4000MC configuration, the System interface also provides the
processor with mechanisms to maintain the cache coherency of shared
data, while providing an external agent the mechanisms to maintain
system-wide multiprocessor cache coherency.
This chapter describes the System interface from the point of view of both
the processor and the external agent.
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