A6.4.3 Exclusive monitor

In the exclusive state machine, the implementation defined transitions are as follows:

  • If the monitor is in the exclusive state, and a store exclusive is performed to a different address, then the store exclusive fails and does not update memory.
  • If a normal store is performed to a different address, it does not affect the exclusive monitor.
  • If a normal store is performed from a different core to the same address it clears the exclusive monitor. If the store is from the same core then it does not clear the monitor.
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