PROCESSOR SWITCHING BETWEEN SECURE AND NON-SECURE MODES

PROCESSOR SWITCHING BETWEEN SECURE AND NON-SECURE 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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BELNET, LIONEL, BROCHIER, STEPHANE, ERIC, SEBASTIEN, DORNAN, CHRISTOPHER, BENTLEY, CHAUSSADE, NICOLAS, WATT, SIMON CHARLES, ORION, LUC
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung: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.