BUS SYSTEM AND DEADLOCK AVOIDANCE CIRCUIT THEREOF

摘要

PROBLEM TO BE SOLVED: To prevent the occurrence of deadlock in a system permitting simultaneous access to a plurality of slaves by split transactions.

SOLUTION: A preceding transaction information management unit 410 manages preceding transaction information issued prior to any of a plurality of slaves from a corresponding master. An issue stop determination unit 420 determines whether a transaction newly issued from the corresponding master becomes a factor of deadlock based on the preceding transaction information. A response output control unit 430 controls responses to return to the corresponding master based on the preceding transaction information. When responses to a preceding transaction from the plurality of slaves returned in order different from the order expected beforehand, a save buffer 470 saves the responses.

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