SECURING AND CONTROLLING REMOTE ACCESS OF A MEMORY-MAPPED DEVICE UTILIZING AN ETHERNET INTERFACE AND TEST PORT OF A NETWORK DEVICE

摘要

A network device including access and test ports, an interface, and first and second controllers. The interface receives an Ethernet frame transmitted over an Ethernet network to the network device. The Ethernet frame includes bits for testing or debugging the memory-mapped device and is received at the interface based on an output of a host device. The first controller converts the Ethernet frame to a first access frame. The test port receives a diagnostic signal transmitted from the host device to the network device. The second controller converts the diagnostic signal to a second access frame and controls passage of the access frames to the memory-mapped device via the access port. The first controller tests or debugs the memory-mapped device based on data received from a register of the memory-mapped device. The data is written in the register based on the first and second access frames.