SYSTEM AND METHOD FOR HANDLING DEVICE ACCESSES TO A MEMORY PROVIDING INCREASED MEMORY ACCESS SECURITY

摘要

A host bridge (404) includes a memory controller (1304) and a security check unit (418). The memory controller (1304) couples to a memory (406) storing data arranged within multiple memory pages. The memory controller (1304) receives memory access signals and accesses the memory (406). The security check unit (418) receives the memory access signals, including a physical address within a target memory page. The security check unit (418) uses the physical address to access one or more security attribute data structures to obtain a security attribute of the target memory page. The security check unit (418) provides the memory access signals to the memory controller (1304) dependent upon the security attribute of the target memory page.