Method and apparatus for loading a trustable operating system
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United States of America Patent
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Dec 8, 2009
Grant Date -
Aug 28, 2003
app pub date -
Feb 25, 2002
filing date -
Feb 25, 2002
priority date (Note) -
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Abstract
A method and apparatus is provided in which a trustable operating system is loaded into a region in memory. A start secure operation (SSO) triggers a join secure operation (JSO) to halt all but one central processing unit (CPU) in a multi-processor computer. The SSO causes the active CPU to load a component of an operating system into a specified region in memory, register the identity of the loaded operating system by recording a cryptographic hash of the contents of the specified region in memory, begin executing at a known entry point in the specified region and trigger the JSO to cause the halted CPUs to do the same.
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