METHOD FOR EXECUTING SECURITY-RELEVANT AND NON-SECURITY-RELEVANT SOFTWARE COMPONENTS ON ONE HARDWARE PLATFORM

摘要

PROBLEM TO BE SOLVED: To execute safety-relevant and non-safety software components (SAFET, STANT) on a hardware platform.SOLUTION: A hardware platform comprises at least a portion SPE1, SPE2 of a memory SPE via write protection mechanisms. A SAFET has full write access to certain areas SPE1 to SPE4 or to the entire memory SPE. The SAFET sets up the protection of the SPE1 and SPE2 before execution of a STANT against an access of the STANT to the SPE1, SPE2. As a result, the STANT has write access only in restricted areas SPE3 to SPE5 and does not have access to any of the SPE1 and SPE2, and after return from the STANT, the memory protection is run down again. At that time, a monitoring component provided in the hardware platform monitors the SAFET for its proper operation.