Arbitration signaling mechanism to prevent deadlock guarantee access latency, and guarantee acquisition latency for an expansion bridge
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 29, 1997
Grant Date -
N/A
app pub date -
Dec 30, 1994
filing date -
Dec 30, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An arbitration signaling mechanism for an intermediate bus coupled between an expansion bridge and a host bridge that manages communication over the intermediate bus. The host bridge includes a CPU posting buffer for posting transactions between a CPU and the expansion bridge, and a DRAM buffer for storing data to be written into the DRAM. The host bridge also includes an arbiter coupled to receive a request signal from the expansion bridge and any other bus agents coupled to the expansion bridge. Responsive to a request from the expansion bridge, the arbiter empties the CPU posting buffer and the DRAM buffer before asserting an acknowledge signal. A passive release method is provided, which includes signaling a passive release semantic by the expansion bridge during a communication cycle in which the expansion bridge has bus control. The host bridge can grant temporary use of the bus to another bus agent before again granting access to the expansion bridge.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully