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Review request for Default, Ali Saidi, Gabe Black, Steve Reinhardt, and Nathan Binkert. Summary ------- Functional Accesses: Update states to support Broadcast/Snooping protocols. In the current implementation of Functional Accesses, it's very hard to implement broadcast or snooping protocols where the memory has no idea if it has exclusive access to a cache block or not. Without this knowledge, making sure the RW vs. RO permissions are right are next to impossible. So we add a new state called Backing_Store to enable the conveyance that this is the backup storage for a block, so that it can be written if it is the only possibly RW block in the system, or written even if there is another RW block in the ssytem. Diffs ----- src/mem/protocol/RubySlicc_Exports.sm 4a6c166f61f7 src/mem/ruby/system/RubyPort.cc 4a6c166f61f7 src/mem/slicc/symbols/StateMachine.py 4a6c166f61f7 Diff: http://reviews.m5sim.org/r/827/diff Testing ------- Tested on a protocol on 10 random seeds to 1M accesses using ruby_mem_test.py with 25% functional accesses. Thanks, Lisa _______________________________________________ gem5-dev mailing list [email protected] http://m5sim.org/mailman/listinfo/gem5-dev
