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Synchronization access method, system thereof and plot processing unit thereof

An access method and access system technology, applied in the field of data processing systems, can solve problems such as data loss

Active Publication Date: 2007-06-20
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the command is switched inversely from P3 16 to P1 12, the data stored in cache 18 will be at risk of being lost because P1 12 can receive the command from controller 20 before the disable command is pipelined to P3 16. Enable commands stored in registers (not shown)

Method used

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  • Synchronization access method, system thereof and plot processing unit thereof
  • Synchronization access method, system thereof and plot processing unit thereof
  • Synchronization access method, system thereof and plot processing unit thereof

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Embodiment

[0040] The embodiment of the invention discloses a synchronization system and method for a shared memory. A synchronous system includes a plurality of processing units or modules arranged as a pipeline, wherein the plurality of processing units or modules can share access to a cache. Synchronous access is achieved through a pair of wait / signal commands. For example, consider two modules where one module (referred to herein as the upstream module) is positioned upstream in the pipeline relative to the other module (referred to herein as the downstream module) and control is from Downstream modules pass to upstream modules (and vice versa). Although the cache can only be accessed by one module at a time, two modules can still share access to the cache. When the control is switched from the downstream module to the upstream module (ie, the upstream module is activated by the enable command, and the downstream module is disabled by the disable command), the upstream module recei...

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Abstract

A synchronization access system and method adapting to synchronization access memory among plurality of modules in the pipeline system. The synchronization access system includes an upstream module and a downstream module for respectively sharing at least one position of the memory. The upstream module is used for receiving a double command having matching identifier, wherein the waiting command is used to make the upstream module delay access the memory in order to avoid the generation of the read out obstacle after written, and the signal command is used to sent to the downstream module. The downstream module transfers the identifier from the signal command to the upstream module when the downstream in idle status in order to cutoff the access for memory. The upstream module stores at least one position for the memory based on judging whether the identifier that received by direct connection in the downstream module is from the double commands.

Description

technical field [0001] The present invention relates to a data processing system, in particular to a computer graphic system and method. Background technique [0002] Computer graphics is the technique of generating pictures, images, or other graphics or drawing information by computers. The technique of generating images or images is also commonly referred to as rendering. Generally speaking, in 3D (three dimension) computer graphics, the geometric pattern of the object surface (or volume) is converted into pixels (pixels) (picture elements) stored in the data frame buffer (frame buffer), and displayed on the display device. [0003] One of the challenges is deciding how to share cache memory. For example, at the application level (application level), the depth and / or texture (texture) processing can be determined by the central processing unit (CPU). The data map (data map)), or can be used in post-processing methods (such as pixel rendering by dequeueing the post-imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/20G06T1/60
CPCG06F12/084G11C7/1039
Inventor 陈文中徐建明屈惠中郑建刚程寿玉
Owner VIA TECH INC