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Priority arbiter with shifting sequential priority scheme

  • US 6,073,132 A
  • Filed: 03/27/1998
  • Issued: 06/06/2000
  • Est. Priority Date: 03/27/1998
  • Status: Expired due to Term
First Claim
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1. A method in a data processing system for arbitrating access to a shared resource by a plurality of devices, wherein each of the plurality of devices is associated with a priority, the method comprising:

  • receiving requests from a number of devices within the plurality of devices for access to the shared resource;

    identifying each device within the number of devices;

    in response to one of the devices within the number of devices being identified as a priority device, granting the priority device to access the shared resource;

    in response to the number of devices being identified as a number of devices with shifting priorities, granting access to the shared resource to a device within the number of devices having a highest priority among the number of devices from which the requests were received; and

    shifting the priority of the device having the highest priority to a lowest priority and shifting the priority of remaining devices within the plurality of devices having shifting priorities after granting the device access to the shared resource.

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