Secure boot up of a computer based on a hardware based root of trust
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United States of America Patent
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Jul 8, 2014
Grant Date -
May 16, 2013
app pub date -
Nov 11, 2011
filing date -
Nov 11, 2011
priority date (Note) -
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Abstract
A method includes performing a boot up of a computer having a system on-chip having multiple processors and a nonvolatile read-only machine-readable medium. The boot up includes enabling a first processor of the multiple processors, while maintaining others of the multiple processors in a disabled state. The boot up includes retrieving initial stage instructions from the nonvolatile read-only machine-readable medium. The boot up also includes executing the initial stage instructions and validating multiple stages of firmware separately. The boot up includes, in response to validating the multiple stages of firmware, executing the multiple stages of firmware in consecutive stages of the boot up, wherein executing of each stage of the multiple stages of firmware enables a different set of disabled hardware components of the computer. The boot up also includes validating an operating system and, in response to validation, transferring control of the computer to the operating system.
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