Common feature mode for microprocessors in a multiple microprocessor system
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United States of America Patent
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Sep 14, 2004
Grant Date -
N/A
app pub date -
Apr 11, 2000
filing date -
Apr 11, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A set of microprocessors may be set to a common mode in which the microprocessors utilize features that are common to all microprocessors. The common mode facilitates proper multiprocessor operation and permits a fix to be applied to each of the microprocessors based on this common mode. Firmware or software can detect whether microprocessors are set to run in different modes in a multiprocessor system. If not, the microprocessors are allowed to run in their normal mode, such as by writing a value to a configuration register associated with each microprocessor. If features are mixed, a different value can be written which tells each microprocessor to revert to a common mode of operation for that family of microprocessors. A common set of microcode patches may be downloaded to the microprocessors. Alternatively, the various microprocessors may also be instructed to run in a particular mode that emulates a particular stepping.
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