Processor resource access control with faked response for a faulty resource

摘要

Resource access control is provided in a manner that avoids unnecessary resource accesses where a resource is already known to be faulty. The resource can be a memory location, a peripheral or any other addressable system component. A resource access mechanism in a processor controls access to resources. The resource access mechanism 100 includes an address control mechanism having a plurality of address control entries, each address control entry providing a fake response indication indicating whether or not a response for the corresponding address is to be faked. The resource access mechanism also includes a fake response generator for selectively generating a faked response for an address in response to the fake response identification of the corresponding address control entry indicating that a response is to be faked, and may also substitute a good address for a faulty one.