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Apparatus and method for accessing cache memory

A technology of an access device and an access method, which is applied in the field of cache access devices, and can solve problems such as increasing cache access time and reducing cache access efficiency

Active Publication Date: 2012-05-16
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when both the first storage unit 52' and the second storage unit 54' need to search for stored data in the second-level memory 60', the second storage unit 54' must wait for the first storage unit 52' and the second-level memory 60 After the data exchange between ' is completed, the second storage unit 54' can exchange data with the second layer memory 60', so that the access time of the cache is increased, and the access efficiency of the cache is reduced

Method used

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  • Apparatus and method for accessing cache memory
  • Apparatus and method for accessing cache memory
  • Apparatus and method for accessing cache memory

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Embodiment Construction

[0026] In order to allow the examiner to have a further understanding and understanding of the structural features and the achieved effects of the present invention, a preferred embodiment and a detailed description are provided, as follows:

[0027] see image 3 , is a block diagram of a preferred embodiment of the cache memory access device of the present invention. As shown in the figure, the cache memory of the present invention is coupled to a processing unit 10, the cache memory includes a first layer memory 20 and a second layer memory 30, and the access device of the cache memory of the present invention also includes a The cache unit 40 and a control unit 42 . The cache unit 40 is used for storing a eviction data evicted from the first level memory 20 . The control unit 42 is used to receive a first read command and the deleted data of the first layer memory 20, store the deleted data of the first layer memory 20 in the cache unit 40, and read and store the first rea...

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Abstract

The present invention relates to an apparatus and a method for accessing a cache memory. The cache memory comprises a level-one memory and a level-two memory. The apparatus for accessing the cache memory according to the present invention comprises a register unit and a control unit. The control unit receives a first read command and a reject datum of the level-one memory and stores the reject datum of the level-one memory to the register unit. Then the control unit reads and stores a stored datum of the level-two memory to the level-one memory according to the first read command.

Description

technical field [0001] The present invention relates to a memory access device and access method, in particular to a microprocessor cache access device and access method. Background technique [0002] With increasing demands on computer systems for processing speed, storing and retrieving large amounts of data and / or instructions, one way to speed up the processor's access to stored data is to A copy of the data is stored in the cache, and when the data requested by the processor is in the cache, it is much faster to read from the cache than from memory. [0003] General processors, especially embedded processors (Embedded Processor), which are often used in system chips, are often limited in their execution efficiency by the waiting time when accessing external memory (External Memory), that is, when the processor accesses external memory , the computing function of the processor will be idle. As shown in FIG. 1 , in order to improve the execution efficiency of the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/08
CPCG06F12/08G06F12/0897
Inventor 卢彦儒林瑞源
Owner REALTEK SEMICON CORP