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state machine for mesi protocol
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| module MesiModel where | |
| open import Data.Vec | |
| open import Data.Fin | |
| open import Data.Nat | |
| open import Data.Product | |
| data MesiState : Set where | |
| Invalid : MesiState | |
| Modified : MesiState | |
| Exclusive : MesiState | |
| Shared : MesiState | |
| open MesiState | |
| record MesiCommandI : Set where | |
| coinductive | |
| field | |
| LocalReadI : MesiState × MesiCommandI | |
| LocalWriteI : MesiState × MesiCommandI | |
| RemoteReadI : MesiState × MesiCommandI | |
| RemoteWriteI : MesiState × MesiCommandI | |
| open MesiCommandI | |
| denoteMCI : MesiState -> MesiCommandI | |
| LocalReadI (denoteMCI Invalid) = Exclusive , denoteMCI Exclusive | |
| LocalReadI (denoteMCI Modified) = Modified , denoteMCI Modified | |
| LocalReadI (denoteMCI Exclusive) = Exclusive , denoteMCI Exclusive | |
| LocalReadI (denoteMCI Shared) = Shared , denoteMCI Shared -- MesiState × MesiCommandI | |
| LocalWriteI (denoteMCI Invalid) = Modified , denoteMCI Modified | |
| LocalWriteI (denoteMCI Modified) = Modified , denoteMCI Modified | |
| LocalWriteI (denoteMCI Exclusive)= Modified , denoteMCI Modified | |
| LocalWriteI (denoteMCI Shared) = Modified , denoteMCI Modified -- : MesiState × MesiCommandI | |
| RemoteReadI (denoteMCI Invalid) = Invalid , denoteMCI Invalid -- check | |
| RemoteReadI (denoteMCI Modified) = Invalid , denoteMCI Invalid | |
| RemoteReadI (denoteMCI Exclusive) = Shared , denoteMCI Shared | |
| RemoteReadI (denoteMCI Shared) = Shared , denoteMCI Shared -- : MesiState × MesiCommandI | |
| RemoteWriteI (denoteMCI Invalid) = Invalid , denoteMCI Invalid -- check | |
| RemoteWriteI (denoteMCI Modified) = Invalid , denoteMCI Invalid | |
| RemoteWriteI (denoteMCI Exclusive)= Invalid , denoteMCI Invalid | |
| RemoteWriteI (denoteMCI Shared) = Invalid , denoteMCI Invalid -- : MesiState × MesiCommandI | |
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