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Functional Unit Mapping With Minimal Service Processor Intervention

IP.com Disclosure Number: IPCOM000041612D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Stranko, TA: AUTHOR [+2]

Abstract

Within many data processing systems, the service processor is the controlling element in all service functions. Since these functions range from power sensing to logic manipulation, the service processor must have a high degree of availability to be able to react to system problems quickly and efficiently. One way of guaranteeing availability is to bury some service functions in the existing support hardware. In a multiprocessor system in which each processor has scan rings which interface to a local interface unit (LIU) and the LIUs communicate with one CIU, the LIUs and the CIU can be initialized and then perform operations asynchronous to the service processor. The interface hierarchy has functional units communicating with the LIUs and the LIUs communicating with the CIU.

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Functional Unit Mapping With Minimal Service Processor Intervention

Within many data processing systems, the service processor is the controlling element in all service functions. Since these functions range from power sensing to logic manipulation, the service processor must have a high degree of availability to be able to react to system problems quickly and efficiently. One way of guaranteeing availability is to bury some service functions in the existing support hardware. In a multiprocessor system in which each processor has scan rings which interface to a local interface unit (LIU) and the LIUs communicate with one CIU, the LIUs and the CIU can be initialized and then perform operations asynchronous to the service processor. The interface hierarchy has functional units communicating with the LIUs and the LIUs communicating with the CIU. This means that it is possible to initiate some LIU to LIU operations under control of the CIU, thus eliminating service processor interaction. When the operation completes, the CIU would interrupt the service processor. Possible applications of this concept would be very useful in the area of scanning functional units. One processor could be completely initialized via scan. The next processor would be initialized without total service processor involvement. Instead, it could perform some setup operations and then processor one could be mapped into processor two by linking the processor LIUs together at the CIU. As processor...