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Read-modify-write processing system and method

A technology for processing systems and writing commands, applied in the field of read-modify-write processing systems, to achieve the effect of improving memory access bandwidth

Active Publication Date: 2011-03-23
JIANGNAN INST OF COMPUTING TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0022] The problem that the present invention also solves is that when prior art realizes memory access, the problem that hardware realizes is more complicated

Method used

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Embodiment approach

[0113] Corresponding to the working process of the above-mentioned read-modify-write processing system, the present invention also provides a read-modify-write processing method, referring to Figure 5 As shown, an implementation of the read-modify-write processing method includes:

[0114] Step s1, dividing the read-modify-write command according to its access address;

[0115] Step s2, parallel processing the divided read-modify-write commands, including: splitting the read-modify-write commands into operation sequences, and sequentially generating memory operation commands based on the operation sequences;

[0116] Step s3, arbitrating the generated memory operation commands in a way that commands of the same type are passed preferentially;

[0117] Step s4, converting the arbitrated memory operation command into an operation signal conforming to the specified format of the memory;

[0118] Step s5, performing data transmission according to the operation signal, reading d...

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Abstract

The invention relates to a read-modify-write processing system and method. The read-modify-write processing system uses a subcommand generating unit, so that the read-modify-write processing system can parallelly process a plurality of read-modify-write commands at any time. The acquired memory operating command is arbitrated in a mode that commands of the same type pass preferentially, so that the commands of the same type can pass preferentially and then be processed. The read-modify-write processing system and method can prevent the problem that the time interval between read-write access of the same activated line is larger from affecting the memory access performance, and can reduce the times of switching the read-write direction of a data bus, thereby improving the memory access band width.

Description

technical field [0001] The invention relates to the field of memory access processing, in particular to a read-modify-write processing system and method. Background technique [0002] Modern computer systems generally use SDRAM memory (including DDR1, DDR2, DDR3, etc.). For this type of memory, there are three types of operation commands for users to access memory: [0003] (1) Read command. The user can take out a piece of data from a certain SDRAM memory by using this command. [0004] (2) Write command. Users can use this command to store data into a certain SDRAM memory. [0005] (3) "Read-Modify-Write" command. Using this command, the user can take out a data from a certain SDRAM memory; then modify the data (such as adding a certain number, subtracting a certain number, etc.) to obtain a new number; finally, save the new number into the SDRAM memory. [0006] The "read-modify-write" command is widely used in modern computer systems. For example, in the operatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/16
Inventor 谢向辉吕晖李宏亮郑方过锋胡苏太虞美兰
Owner JIANGNAN INST OF COMPUTING TECH
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