Is the cache enabled in whisper?

[divastor]

Memory::configureCache is used only once, in:

bool
Hart<URV>::configureCache(uint64_t size, unsigned lineSize,
                          unsigned setSize)
{
  return memory_.configureCache(size, lineSize, setSize);
}

but Hart<URV>::configureCache is never used. The cache doesn't seem to be enabled by default. Is there a way to enable it?