METHOD AND APPARATUS FOR SECURE CONTEXT SWITCHING IN A SYSTEM INCLUDING A PROCESSOR AND CACHED VIRTUAL MEMORY

摘要

A kind of Secure mode controller offer controls the data processing system of the context switching between safe mode and user mode, including processor and memory management unit. This method includes monitoring the memory management unit to detect the non-access extremely entry point address comprising secure mode entry instruction, verification, in response to the detection of the entry point address, the instruction of this safe entry is executed by processor, and context handoff response from the user mode to the safe mode is made in verifying the secure mode entry instruction to be executed by processor. It includes security bit to identify secure cache line or non-secure cache line that the instruction cache and data cache of each cache line, which can have label,.