Hi,
I have a question about how to retrieve the physical address of the evicted
cache line, which is replaced by a new inserted one.
I found the code in bool CacheController::cache_insert_cb(void *arg) calls
cacheLines_->insert(queueEntry->request, oldTag), which inserts the new
request's phyAddress.
Then the line of CacheLine *line = base_t::select(physAddress, oldTag) calls
the AssociativeArray's
V* select(T addr, T& oldaddr) {
return sets[setof(addr)].select(tagof(addr), oldaddr);
}
If there is conflict, it will call lru() to find the way to insert the new
tag.
Here, I notice that the tagof(addr) will convert the physical address to its
tag by floor() to find the way in the cache set to insert the new phyAddress.
I am wondering is there any way to obtain the physical address of the cacheline
which is being replaced by the new one. Thanks.
- Hui
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