Hey there fine developers of Gem5, So I asked a question a while ago, about implementing a new cpu model in gem5. I'm still in that road and I have came up with a scenario to do the job. However, I'm not sure if its following the standards of GEM5.
So the first steps of the scenario is: 1_ I define my base CPU model as a MemObject. This CPU model of mine does not take instructions and doesn't know any threads. So I thought, instead of inheriting form BaseCPU, I start from MemObject. 2_ Within this CPU model of mine, I have several components. Some of these components are: Scheduler, Router (local), Controller, An SRAM to save some internal configuration parameters and a Functional Block, which does the computation. To ease the process of implementation, I decided the define these components, each as a ClockedObject. *** Now here I am not sure if I am doing this right. Point is, each of these components see 1 or some other specific components within the cpu model. For instance, Scheduler sees the Controller, and controller sees the Functional Block. Controller Also sees the scheduler to send some feedback messages. *** My questions would be: _ Q) If I should define them as memObjects instead of ClockedObject, and use the Master and Slave ports to connect them to eachother ? Or just go with clockedObject and just save references within each component to be able to communicate ? _ Q) In general, what is the benefit of using Master and Slave ports ? _ Q) For the SRAM that I'm about to insert in the cpu model, since its very much like cache designs of conventional cpu models, should I just use one of the already implemented cache models ? _ Q) In case if finally decide to implement the SRAM, should I define it as a Memobject ? or just go with BaseCache ? 3_ I'd then associate each component within the CPU model class. I'm also going to implement all of the CPUs behavior within the CPU model class, does this disturb GEM5's standards ? (Consider this a small project just to implement the behavior of a non-conventional CPU model) I know its a lot of question, and I'd appreciate any help I can get from you guys ALOT! Thank you so much. Best, Amir
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