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A motherboard, computer and method for protecting memory data

A memory and computer technology, applied in computer security devices, internal/peripheral computer component protection, computing, etc., can solve problems such as potential safety hazards, existence of read and write operations, complex management, etc., to ensure security and flexible control of flash memory and safe effect

Active Publication Date: 2011-12-28
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a main board and method for protecting memory data, which is used to solve the defects in the prior art that there are potential safety hazards and complicated management in the read and write operations of the stored data stored in the flash memory

Method used

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  • A motherboard, computer and method for protecting memory data
  • A motherboard, computer and method for protecting memory data
  • A motherboard, computer and method for protecting memory data

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Embodiment Construction

[0019] In order to make the purpose, technical features and implementation effects of the present invention clearer, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] In the technical solution provided by the present invention, at least one register unit is required to set the access rights of different access sources; the bus control unit is used to receive access instructions to the flash memory, and obtain the access corresponding to the access source. permission, sending a driving signal to control the access permission of the flash memory when accessing the flash memory according to the access permission. Select preferred embodiment below to describe in detail:

[0021] In a computer system sharing flash memory 104, such as figure 1 As shown, if there are multiple control chip units, different control chip units need to perform read and write operations on the...

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PUM

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Abstract

The invention provides a main board, a computer and a method for protecting memory data. The main board comprises at least two control chip units used for transmitting an access instruction when accessing the memory data, at least one register unit used for storing corresponding relationships between each control chip unit and access right, and a bus arbitration control unit used for receiving the access instruction, determining a first control chip unit transmitting the access instruction from the at least two control chip units according to the access instruction, acquiring the access right of the first control chip unit for accessing the memory data according to the corresponding relationships, and transmitting a drive signal for realizing the access right according to the access right. Due to the application of the technology provided by the invention, the realization of various access functions is guaranteed, and simultaneously the security of important data in a flash memory is fully guaranteed; and the control to the flash memory of a computer system is more flexible and secure.

Description

technical field [0001] The invention relates to computer data protection, in particular to a mainboard, computer and method for protecting memory data. Background technique [0002] In current computer system or embedded system design, flash memory (FLASH) is a common memory. In order to protect the data stored in the Flash, the general Flash chip will be designed with a special protection mechanism, such as the write protection pin WP#, when the pin is set to low level, the Flash is in the write protection state, and the system only It can read and write to Flash, but the write operation will be rejected by the chip; on the contrary, after WP# is set to high level, the system can read and write to Flash, which can not only read the data in it, but also modify the data in it. data. In some cases, Flash will be shared by multiple subsystems. In this case, different subsystems may have different access rights requirements for FLASH, and some subsystems require Flash to be i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/00G06F12/14G06F21/79
Inventor 张建辉
Owner LENOVO (BEIJING) LTD