Electronic device and method for electronic device to realize write protection of non-volatile storage medium

Abstract

The invention discloses electronic equipment and a method for the electronic equipment to achieve nonvolatile storage medium write-protection. Factory setting information not only includes first-class information related to the function of the electronic equipment but also includes second-class information for representing the storage space of the factory setting information in nonvolatile storage media, moreover, the second-class information is read from the nonvolatile storage media in the power-on starting process of the electronic equipment, the write access of a CPU about the storage space represented by the second-class information in the nonvolatile storage media can be shielded, and therefore write-protection can be conducted on the factory setting information stored in the nonvolatile storage media, wherein local storage space is used as the particle size, and the write-protection does not depend on software operating in the CPU.

Description

technical field [0001] The invention relates to an electronic device and a method for the electronic device to realize write protection of a non-volatile storage medium. Background technique [0002] Electronic equipment is usually equipped with a non-volatile storage medium for storing factory setting information related to functions of the electronic equipment. In order to prevent the factory setting information from being modified by the user, the non-volatile storage medium needs to be write-protected. [0003] A common write protection method is to implement chip-level write protection for non-volatile storage media through hardware configuration. However, the protection granularity of the write protection realized by this method is limited to the chip level, and independent write protection cannot be implemented for the local space of the non-volatile storage medium. [0004] Another common type of write protection is: implement write protection of any storage space ...

AI Technical Summary

Problems solved by technology

This method can achieve write protection with a granularity smaller than the chip level, but the write protection realized by this method is completely dependent on software, so the reliability of the write protection realized by it is not high

[0005] It can be seen that the write protection methods implemented on non-volatile storage media in the prior art cannot satisfy both smaller protection granularity and higher reliability

Images