Computer system and arbitrator utilizing a bus bridge that avoid

Details Computer system and arbitrator utilizing a bus bridge that avoid Computer system and arbitrator utilizing a bus bridge that avoid

1996-02-26

1998-07-07

Ray, Gopal C.

Multiplex communications

Wide area network

Packet switching

395309, 370402, 370462, G06F 1314, G06F 13362

Patent

active

057782350

ABSTRACT:
A computer system and arbitrator prevent a livelock condition from occurring between a host bus bridge and a PCI bridge, where the host bus bridge and PCI bridge conform to the specification delineated in the PCI-to-PCI Bridge Architecture Specification 1.0 and PCI Local Bus Specification 2.0. The system includes an arbitrator for masking from the PCI bridge a request (REQ.sub.--) generated by a device on a second bus. The arbitrator requests that the host bus bridge flush all existing I/O requests (FLUSHREQ.sub.--) and postpone any future I/O requests from a central processing unit. The third step includes, in response to a notification from the host bus bridge that all I/O requests have been flushed and that any future I/O requests from the central processing unit will be postponed (MEMACK.sub.--), the arbitrator unmasks the request to the PCI bridge (GREQ.sub.--). In response to unmasking the request to the PCI bridge, the PCI bridge grants control of the second bus to the device (GNT.sub.--). This system guarantees that any data posted in an internal write buffer of the bus bridge can be delivered to system memory.

REFERENCES:
patent: 5151900 (1992-09-01), Snyder et al.
patent: 5175733 (1992-12-01), Nugent
patent: 5369745 (1994-11-01), Faber
patent: 5426739 (1995-06-01), Lin et al.
patent: 5455915 (1995-10-01), Coke
patent: 5511165 (1996-04-01), Brady et al.
patent: 5542056 (1996-07-01), Jaffa et al.
patent: 5546546 (1996-08-01), Bell et al.
patent: 5557758 (1996-09-01), Bland et al.
patent: 5568619 (1996-10-01), Blackledge et al.
patent: 5581714 (1996-12-01), Amini et al.
patent: 5586268 (1996-12-01), Chen et al.
patent: 5594882 (1997-01-01), Bell
patent: 5603051 (1997-02-01), Ezzet

Affiliated with

Also associated with

Rating

Computer system and arbitrator utilizing a bus bridge that avoid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Computer system and arbitrator utilizing a bus bridge that avoid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer system and arbitrator utilizing a bus bridge that avoid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1216826