Method and apparatus for locking arbitration on a remote bus
US5572734A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1995 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | May 2, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/173
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A master bus interconnecting multiple masters is coupled via any number of intervening buses to a slave bus interconnecting multiple slaves and masters. A lock arbiter signal is passed to each successive bus-to-bus interface concurrent with an instruction issued by a master accessing a slave on a remote bus. Address, control, data, and lock arbiter signals are buffered in successive intervening bus-to-bus interfaces including the bus-to-bus interface to the slave bus. The lock arbiter signal when received by the slave bus-to-bus interface will set a lock arbiter register within bus slave bus-to-bus interface. Setting the lock arbiter register once a target slave has been accessed prevents any other master operating on the remote bus from using the remote bus or connecting to the remote bus-to-bus interface. Indivisible sequences of bus operations targeted for the target slave may be confined to the bus to which the target slave is coupled although intervening buses and bus-to-bus interfaces may be disconnected and reassigned pending completion of the indivisible sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.