Method and apparatus for arbitrating access to a PCI bus by a plurality of functions in a multi-function master
US6546448B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1999 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Nov 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/362
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for arbitrating access to a pci bus by a plurality of functions in a multi-function master. The arbitrating method is performed among the multiple functions of a multi-function master. The arbiter includes a rotating inquiry scheduler (RIS) and a heuristic inquiry initiator (HII). The RIS receives the local inquiry signal from the functional circuit and stores it. According to the local inquiry signal, a bus inquiry signal is generated and sent to the HII, and is sent to the PCI bus to request a use of the PCI bus. If the PCI bus responds a delay transaction termination, the HII can repeatedly send the bus inquiry signal to the PCI bus until the PCI bus grants the privilege to use the PCI bus. The HII then informs the RIS, which arranges the functional circuit to transmit data through the PCI bus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.