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Write-operation process method, system and apparatus of FLASH

A processing method and technology for writing operations, applied in the field of data security

Active Publication Date: 2008-05-14
BEIJING ZHIGU RUI TUO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0034] The present invention provides a method, system, device and CPU management system for processing FLASH write operations, which are used to solve the problem of recovering after the system startup code and main program are destroyed due to abnormal conditions

Method used

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  • Write-operation process method, system and apparatus of FLASH
  • Write-operation process method, system and apparatus of FLASH
  • Write-operation process method, system and apparatus of FLASH

Examples

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Embodiment 1

[0136] In this example, the implementation of CPLD (Complex Programmable Logic Device, Complex Programmable Logic Device) will be used for illustration. CPLD is a programmable logic device whose logic functions can be defined by users according to their needs after manufacture. It is generally used to implement some simple user-customized logic in electronic systems. Obviously, use CPLD just can realize the function of above-mentioned request module, write protection module, meanwhile, also used the CPU management system that comprises management system in the foregoing embodiment in implementation, because CPU management system is a software operating system, in this CPU management It is also easy for those skilled in the art to realize the functions of the backup module, the receiving module, the judging module, the positioning module, the output module and the restoring module in the system. At the same time, it should be pointed out that different functional modules can be...

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Abstract

The invention discloses a FLASH writing operation processing method, system and equipment, including: before performing the writing operation on the FLASH, backing up the data to be rewritten in the FLASH; after completing the writing operation on the FLASH, initiating an interrupt request; After receiving the interrupt request, enter the interrupt processing, and judge the legality of the write operation according to the write operation record; when determining that the write operation is legal, exit the interrupt processing, and when determining that the write operation is illegal, according to the backup Restore the overwritten data. By using the invention, when it is determined that the write operation is illegal, the rewritten data can be restored, so that even if a wrong write operation occurs, the system will not be paralyzed due to wrong modification.

Description

technical field [0001] The invention relates to data security, in particular to a FLASH write operation processing method, system, FLASH write operation processing device and CPU management system. Background technique [0002] FLASH memory, also known as flash memory, is a non-volatile memory that can be erased multiple times online, that is, data will not be lost after power failure. It is a typical storage device in embedded systems. In embedded systems, FLASH is generally Code and data used to store system work. [0003] Parallel FLASH is a kind of FLASH memory, also known as NOR FLASH. Since parallel FLASH supports on-chip execution of code, applications and startup code can run directly on FLASH, so embedded systems are generally used to store system startup code. [0004] Parallel FLASH devices generally include address signal lines, data signal lines, and read-write control lines. The CPU processor reads or writes FLASH content through the above three signal lines. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14G06F13/16
Inventor 林建加
Owner BEIJING ZHIGU RUI TUO TECH
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