Switching between secure and non-secure processing modes

A data processing system including a processor operable in a plurality of modes and in either a secure domain or a non-secure domain. The system includes at least one secure mode being a mode in the secure domain, at least one non-secure mode being a mode in the non-secure domain, and a monitor mode...

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Bibliographic Details
Main Authors Watt, Simon Charles, Dornan, Christopher Bentley, Orion, Luc, Chaussade, Nicolas, Belnet, Lionel, Brochier, Stephane Eric Sebastien
Format Patent
LanguageEnglish
Published 07.12.2010
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Summary:A data processing system including a processor operable in a plurality of modes and in either a secure domain or a non-secure domain. The system includes at least one secure mode being a mode in the secure domain, at least one non-secure mode being a mode in the non-secure domain, and a monitor mode. When the processor is executing a program in a secure mode the program has access to secure data which is not accessible when the processor is operating in a non-secure mode. Switching between the secure and non-secure modes takes place via the monitor mode and the processor is operable at least partially in the monitor mode to execute a monitor program managing switching between the secure and non-secure modes.