International Business Machines Corporation

Hemlata Nellimarla

Stephan Otis Broyles

Douglas Michael Boecker

Alwood Patrick Williams, Iii

Scott Allen Liebl

John Steven Langford

Michael Youhour Lim

Atit D Patel

Andreas Arnez

A mechanism is provided for locking an end device for the period of time that the device is needed, thus disabling access by any other application or process. Having the device locked, rather than the bus, allows other applications to use the bus to access other devices at the same time. This is achieved by providing a virtual bus arbitration, which arbitrates applications' use of the physical bus. The virtual bus arbitration algorithms allow bus operations from different applications to overlap on the physical bus as long as their target devices and associated bus locks are on different end devices.

Device address locking to facilitate optimum usage of the industry standard IIC bus

A method, apparatus, and computer instructions for transferring data from a master to a set of applications executing on a slave. Data is received from a master at a device driver in the slave. The data is parsed for an identifier by a virtual hub in the slave, wherein the identifier is associated with the data by the master. The data is sent to an application within the set of applications based on the identifier.

Method and apparatus for transferring data to virtual devices behind a bus expander

A method, apparatus, and computer instructions for managing requests for data by processes in a data processing system. Requests for data from the processes in slave mode are tracked. Data received by a device driver is stored, wherein the data may originate from multiple masters. The data is sent to the processes, wherein the device driver is not required to handle requests for the processes in slave mode.

Method and apparatus for multiple slaves to receive data from multiple masters in a data processing system

A system, method, and product are disclosed in a data processing system for serializing hardware reset requests in a software communication request queue in a processor card. The processor card processes software communication requests utilizing the queue in a serial order. A hardware reset request is received by the processor card and put in the queue. The hardware reset request is processed from the queue in the serial order with all requests from the queue that are currently being serviced have completed being serviced.

Method, system and product for serializing hardware reset requests in a software communication request queue

Method apparatus, and computer instructions for updating a flash memory. Information regarding the flash memory, for example, configuration and size information, is determined, and the determined information is then used to apply a code update to the flash memory. The invention allows for the same update program or tool to be used for data processing systems with different sizes or configurations of flash memories.

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Austin, TX, United States of America

Hemlata Nellimarla