still need help.... if component A is connected to B and C. How A decide to send a packet to B or C? Digging more reveals that Pachet class has two fields "src" and "dest".
However their type is "NodeID" and I don't know if it referes to Core#. Specifically, If "fetch" and "iew" both are connected to Dcache, then how Dcache can reply to "fetch"? On 12/12/11, Mahmood Naderan <[email protected]> wrote: > ok, I found somethings but nt sure about that. What I understand is: > > This function in o3/cpu.cc says that fetch stage in o3cpu is connected > to icache which came from previous cpu (atomic). Also iew component in > o3cpu is connected to dcache which came from previous cpu (atomic). > > BaseCPU::takeOverFrom(oldCPU, fetch.getIcachePort(), iew.getDcachePort()); > > In another word, when switching cpu from atomic to o3, icache is > connected to fetch and dcache is connected to iew. > > Now the question is, what can I do if I want to do more wiring. For > example, I want to connect fetch stage to dcache. What I did was to > add another argument: > > BaseCPU::takeOverFrom(oldCPU, fetch.getIcachePort(), > iew.getDcachePort(), fetch.getDcachePort()); > and modify the functions definition. > > However by doing that, the wire from iew to dcache is overwritten by > the wire from fetch to dcache. > > Is there any suggestion for that? > > > On 12/7/11, Mahmood Naderan <[email protected]> wrote: >> Hi, >> While debugging O3CPU, I noticed that in this part of code >> >> if (!ic->isConnected()) { >> Port *peer = oldCPU->getPort("icache_port")->getPeer(); >> ic->setPeer(peer); >> peer->setPeer(ic); >> } >> >> if (!dc->isConnected()) { >> Port *peer = oldCPU->getPort("dcache_port")->getPeer(); >> dc->setPeer(peer); >> peer->setPeer(dc); >> } >> >> ic->setPeer(peer); goes to DefaultFetch<Impl>::IcachePort::setPeer(Port >> *port) >> but >> dc->setPeer(peer); goes to LSQ<Impl>::DcachePort::setPeer(Port *port) >> >> Where in the code, this wiring has been defined? >> >> -- >> // Naderan *Mahmood; >> > > > -- > -- > // Naderan *Mahmood; > -- -- // Naderan *Mahmood; _______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
