Karthi, > When the Instruction/data is read from memory, > it's copy will be put into the cache. > > Question: > > How does the R4k processor determines whether the > value read from memory is Instruction or Data so that > the value will be put into the appropriate primary > cache? The caches are not prescient... Data is only ever put into the cache when the CPU *uses* it (and it isn't there already). If the CPU was do ingan instruction fetch, the copy of the memory data goes in the I-cache; if the CPU was trying to do a load it goes in the D-cache. -- Dominic
