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Data processing system and method for selectively updating an invalid coherency state in response to snooping a castout
Data processing system and method for selectively updating an invalid coherency state in response to snooping a castout
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机译:响应于侦听铸件而选择性地更新无效一致性状态的数据处理系统和方法
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摘要
In an entry of a first cache memory within a first coherency domain of a data processing system including at least first and second coherency domains, a coherency state field is set to a first state that indicates that an associated address tag is valid, an associated storage location does not contain valid data, and a memory block identified by the address tag is likely cached outside the first coherency domain. In response to snooping a castout operation, the first cache memory determines if the castout operation hits in the entry and, if so, updates the coherency state field from the first state to a second state indicating that the associated address tag is invalid.
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