ENABLING SECURED DEBUG OF AN INTEGRATED CIRCUIT

摘要

Secured debug of an integrated circuit having a test operation mode and a secure mission operation mode. The integrated circuit has a processing unit, a test interface through which the test operation mode is controllable, an on-chip memory which is accessible in the test operation mode and in the secure mission operation mode, and one or more protected resources inaccessible in the test operation mode. The processing unit is configured, in the test operation mode, to receive an authenticated object through the test interface, and store the received authenticated object in the on-chip memory. The processing unit is moreover configured, upon reset into the secure mission operation mode, to execute a boot procedure to determine that the authenticated object is available in the on-chip memory, authenticate the authenticated object, and—upon successful authentication—render the more protected resources accessible to a debug host external to the integrated circuit.

主权项

1. An integrated circuit having a test operation mode and a secure mission operation mode, the integrated circuit comprising:
a processing unit; a test interface through which the test operation mode is controllable; an on-chip memory, the on-chip memory being accessible in the test operation mode and in the secure mission operation mode; at least one protected resource, the at least one protected resource being inaccessible in the test operation mode; the processing unit being configured, in the test operation mode, to:
receive an authenticated object through the test interface; andstore the received authenticated object in the on-chip memory; and the processing unit being configured, upon reset into the secure mission operation mode, to execute a boot procedure to:
determine that the authenticated object is available in the on-chip memory;authenticate the authenticated object; andupon successful authentication, render the at least one protected resources accessible to a debug host external to the integrated circuit.