Bus deadlock avoidance during master split-transactions
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United States of America Patent
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-
Nov 21, 1995
Grant Date -
N/A
app pub date -
Jan 25, 1994
filing date -
Jan 25, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Signal transactions are conducted between nodes coupled to a bus, without causing bus deadlock during split transactions. Deadlock avoidance is achieved by rendering a node effectively unavailable at such times to serve as a bus slave for a new bus master. When the 'locking' node serves as a transaction source, deadlock is avoided by deasserting, during a split transaction, a buffer-available signal, which is used normally to indicate receiver buffer availability. Additionally, when the 'locking' node serves as a transaction destination, deadlock is avoided by deasserting a bus-ownership request signal, which is used normally for requesting bus ownership. After completion of the split transactions, such signals may be unmasked.
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