State machine based bus cycle completion checking in a bus bridg

Details State machine based bus cycle completion checking in a bus bridg State machine based bus cycle completion checking in a bus bridg

1997-07-31

1999-09-28

Auve, Glenn A.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

395500, G06F 1314

Patent

active

059580356

ABSTRACT:
In a computer system having a bus bridge connecting a plurality of system buses, a methodology for checking completion of a bus cycle in a bus bridge verification system is disclosed. The methodology verifies that the bus bridge is asserting proper signals for each bus protocol. As each bus cycle begins, a state machine object corresponding to that bus cycle is instantiated and each byte of said bus cycle state machine object is checked for resolution. A stimulator object may provide a bus stimulus to said bus cycle state machine object which may update its states in response thereto. Upon transitioning into its holding state, the bus cycle state machine object may verify that each byte of its transaction is accounted for and has been routed to the proper destination. The state machine object for a particular bus cycle may contain storage for that bus cycle's properties such as clock cycle number, cycle address, cycle type, cycle data and the status of byte enables. This methodology maintains a static bus cycle object that can determine if its transaction has been resolved. The cycle-based approach avoids instances of false failures arising from address remapping, byte merging or byte collapsing.

REFERENCES:
patent: 5068852 (1991-11-01), Locke
patent: 5761443 (1998-06-01), Kranich
patent: 5835739 (1998-11-01), Bell et al.

Affiliated with

Also associated with

Rating

State machine based bus cycle completion checking in a bus bridg does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with State machine based bus cycle completion checking in a bus bridg, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and State machine based bus cycle completion checking in a bus bridg will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-697732