Method and apparatus for detecting and resolving bus hang in a bus controlled by an interface clock

A method for resolving bus hang in a bus of a computing device, the method comprising:

• receiving one or more signals that a finite state machine of the computing device is active, an output of the finite state machine in communication with the bus;
• monitoring an interface clock of the bus, the interface clock providing an input signal to the finite state machine;
• generating an event notification in response to the interface clock turning off while the finite state machine is active;
• sending an interrupt in response to the event notification;
• and
• performing a recovery operation in response to the interrupt.

A computer program product comprising a non-transitory computer usable medium having a computer readable program code embodied therein, said computer readable program code adapted to be executed to implement a method for resolving bus hang in a bus of a computing device, the method comprising:

• receiving one or more signals that a finite state machine of the computing device is active, an output of the finite state machine in communication with the bus;
• monitoring an interface clock of the bus, the interface clock providing an input signal to the finite state machine;
• generating an event notification in response to the interface clock turning off while the finite state machine is active;
• sending an interrupt in response to the event notification;
• and
• performing a recovery operation in response to the interrupt.

A computer system for resolving bus hang in a computing device, the system comprising:

• means for receiving one or more signals that a finite state machine of the computing device is active, an output of the finite state machine in communication with the bus;
• means for monitoring an interface clock of the bus, the interface clock providing an input signal to the finite state machine;
• means for generating an event notification in response to the interface clock turning off while the finite state machine is active;
• means for sending an interrupt in response to the event notification;
• and
• means for performing a recovery operation in response to the interrupt.