Method and apparatus for restricting memory access
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United States of America Patent
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Nov 20, 2001
Grant Date -
N/A
app pub date -
Jun 9, 1999
filing date -
Jun 9, 1999
priority date (Note) -
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Abstract
A method and apparatus for restricting memory access includes processing that begins by monitoring memory access requests. When one of the memory access requests is requesting access to restricted memory, determining the mode of operation of the processor. Note that the mode of operation of the processor may be a system special operation (i.e., operations internal to the operation of the computing system that are beyond access of computing system users and programmers), non-system special operations, or a valid response to a restricted memory access request. When the mode of operation is non-system special and the memory access is requesting access to restricted memory, the memory access request is modified. The processing then continues by providing a response in accordance with the modified memory access request.
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