Method and apparatus for providing a context switch in response to an interrupt in a computer process
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United States of America Patent
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Jul 9, 1996
Grant Date -
N/A
app pub date -
Jun 30, 1993
filing date -
Jun 30, 1993
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A processor which includes at least a pair of call stacks and a pair of register files which may be utilized for running processes. The processor includes circuitry for detecting when an interrupt has occurred and switching from a stack and registers being utilized by a running process to a clean stack and registers to be utilized by the interrupting process. The processor then runs an interrupt start process which places the process interrupted and the circuitry utilized by that process into a condition in which the process may be safely interrupted. Similarly, the process circuitry detects when the interrupt is completed, performs a context switch in which the original stack and register are again made available, and switches to a process adapted to place the interrupted routine in an appropriate state to restart.
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