Method to Resolve Deadlock in a Bus Architecture Comprising Two Single-Envelope Buses Coupled Via a Bus Bridge and Running Asynchronously

摘要

A method to resolve a deadlock in a bus architecture comprising a first and a second single-envelope bus with at least one master and one slave each, where the first and second single-envelope buses are arranged on different sides of an asynchronous boundary and are coupled via a bus bridge, said method comprising the steps of:granting the bus to a first master arranged on a first side of the asynchronous boundary which requests a transaction within a critical time window;monitoring the bus which has been granted for transaction to the first master;stealing silently the bus from the first master if a deadlock condition arises;granting the bus to a second master arranged on a second side of the asynchronous boundary raising the deadlock condition by requesting a second transaction within the critical time window;completing the second transaction to resolve the deadlock scenario; andreturning back the bus to the first master to complete the first transaction.;Further, a bus architecture to perform said method, a single-envelope bus architecture and a computer system comprising such a bus architecture are described.