Method for improving controllability in data processing system with address translation
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United States of America Patent
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Jan 15, 2002
Grant Date -
N/A
app pub date -
Feb 18, 2000
filing date -
Aug 19, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
When there are write accesses to user pages in a data processing system that are marked as write-protected in a translation memory, the method checks, after an interrupt request, a corresponding page table entry and also whether there is an access with system authorization. If there is an access with system authorization, the write-protection is temporarily dropped until an operating mode changes from the system to a user. In order for the write-protection to be subsequently restored, control bits are used as indicators that are used to declare entries in the translation memory affected by the system accesses to be declared invalid.
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