are generated by the processor when it requires a system resource. The following processor requests are supported:
- coherent block read shared request
- coherent block read exclusive request
- noncoherent block read request
- double/single/partial-word read request
- block write request
- double/single/partial-word write request
- upgrade request
- eliminate request
Processor write and eliminate requests do not require or expect a response by the external agent. However, if an external agent detects an error in a processor write or eliminate request, it may use an interrupt to signal the processor. It is not possible to generate precise exceptions for processor write and eliminate requests for which an external agent detects an error.
Processor read and upgrade requests require some type of response by the external agent.
