Method and apparatus for on the fly descriptor validation

Details Method and apparatus for on the fly descriptor validation Method and apparatus for on the fly descriptor validation

1997-08-18

1998-09-29

Shah, Alpesh M.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

711208, G06F 900

Patent

active

058157298

ABSTRACT:
A method for improving the load time of code and data descriptors is provided. The invention utilizes hardware validation logic for code and data descriptors, but uses a software program to validate system descriptors. In those instances where the descriptor being loaded is a code or data descriptor, system validation checks are not performed. This allows code and data descriptors to be validated during the write back stage of the descriptor store operation, thereby eliminating processing delays typically associated with performing validation. If the descriptor is found invalid by the hardware validation logic, a branch is made to a software program which is used to determine whether the descriptor is invalid, or is actually a system descriptor. If it is a system descriptor, then system descriptor validation checks are performed by a software program.

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