Safe multi-firmware fusion system and multi-firmware fusion control method

Abstract

The present invention discloses a safe multi-firmware fusion system and a multi-firmware fusion control method. The multi-firmware fusion system includes at least one processor, a storage medium, a storage medium controller, a multi-address mapping module, an operating address space detection module, and an access control Module, key storage control entity and decryption module; the storage medium controller is used to complete the reading of application firmware or data on the storage medium according to the access request of the processor or other modules; the multi-address mapping module is used to complete the address of different application firmware Space mapping; the running address space detection module is used to determine the current address space according to the address and executed instructions of the processor; the key storage control entity is used to store the application firmware encryption key and the application firmware encryption and decryption control, and Provides a read-write protection mechanism for keys. The invention can reduce the complexity of firmware upgrade in a multi-firmware fusion system, and improve the stability of the system and the safety of multi-firmware fusion.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits and relates to a multi-firmware system, in particular to a safe multi-firmware fusion system and a multi-firmware fusion control method. Background technique [0002] With the rapid development of embedded systems and the semiconductor industry, more and more systems have introduced multi-firmware architecture, that is, the firmware in a system with complete functions is composed of multiple parts, and the developer of each firmware may They come from different companies. They define the firmware application program interface between them, and each plays their own part. Through this cooperation method, they can jointly realize the development of product functions, accelerate the time to market of products, and improve their respective competitiveness. [0003] Typical multi-firmware fusion cases include smart door lock cases, cooperation cases between home appliance manufacturers and c...

AI Technical Summary

Problems solved by technology

[0009] Assume that the firmware Xa needs to be upgraded to Xb now. For the sake of stability, when the firmware is upgraded, the new firmware will be written to another area. Here, it is assumed that the memory address written after the firmware Xa is upgraded is 0x00200000. At this time, if the new firmware Xb To work normally, you need to modify the address mapping to: running address 0x23000000 à storage address 0x00200000, but at this time the address used by the new firmware Xb to call firmware Y should still be 0x23080000. According to the mapping relationship, the memory address corresponding to firmware Y should be 0x00280000, determined by figure 2 It can be seen that the firmware Yb may not exist here or the existing firmware Yb is not necessarily the latest firmware. It is necessary to upgrade the area before the firmware Xa and copy the firmware Ya from 0x00180000 to the 0x00280000 area to make the system run normally. This will not only increase This increases the complexity of the system upgrade, prolongs the upgrade time, and increases the risk of failure due to firmware copying

[0010] (2) poor security

The traditional method is to encrypt the firmware, but in the traditional multi-firmware fusion system, the algorithm firmware and the application firmware use the same key to encrypt as a whole. Although it solves the risk that the algorithm firmware cannot be stolen by a third party, it cannot solve the problem. The problem that the algorithm firmware is read by the application firmware, the algorithm firmware still has the risk of being stolen by the application firmware, and the intellectual property rights of the fingerprint algorithm firmware cannot be guaranteed

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