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Method for transferring data of systems on chip, and direct memory access controller

A data transmission method and memory access technology, applied in the field of system-on-chip, can solve the problems of increased data transmission volume and bus transmission load of the system-on-chip, and achieve the effect of simple data transmission and reduction of total control logic.

Active Publication Date: 2009-08-26
DATANG MICROELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Multiple transmissions of the same data will increase the data transmission volume and bus transmission load of the system on chip

Method used

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  • Method for transferring data of systems on chip, and direct memory access controller
  • Method for transferring data of systems on chip, and direct memory access controller
  • Method for transferring data of systems on chip, and direct memory access controller

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Embodiment Construction

[0057] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] The core idea of ​​the present invention is to replace the buffer FIFO in the original direct access controller with a data reservation station, so that the original independent data transmission channels can be shared. The data retention station contains a plurality of data registers with labels, and the labels include status bits corresponding to the destination state machine one by one. The source state machine forwards the data transmitted by the source device to the data register, and at the same time sets the state position corresponding to the destination state machine that needs to read the data in the readable state, so that the destination state machine that needs the data is in its corresponding state position as ...

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Abstract

The invention discloses a data transmission method of an on-chip system, comprising: setting at least one data register with a label in a direct memory access controller of the on-chip system, and the label includes state bits corresponding to a target state machine one by one; The source state machine fills the data of the source device into the data register, and fills in the status bit of the data register label; the destination state machine reads the data register when its corresponding status bit is in a readable state The data in it is sent to the destination device. At the same time, the invention also discloses a direct memory access controller of the on-chip system and a data reservation station. When the on-chip system adopts the multicast transmission mode, the invention reduces the total processing delay of the system caused by multiple visits to the source equipment, and reduces the data transmission amount and the bus transmission load of the on-chip system.

Description

technical field [0001] The invention relates to the field of on-chip systems, in particular to a data transmission method and a direct memory access controller of the on-chip system. Background technique [0002] With the development of semiconductor technology, system-on-chip allows more and more modules to be integrated into a single chip, and the system applications faced by chip designers are becoming more and more complex and diverse. The data transmission of the system on chip mostly adopts the form of direct memory access (DMA), which relies on hardware to realize the direct data transmission between the source device and the destination device, and the data transmission process does not require processor intervention. [0003] At present, the direct memory access (DMA) introduced in the system on chip is mainly divided into two modes, one is based on the centralized transmission mode, all data stream transmission in the system is undertaken by one or a small number o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/28
Inventor 牛锋
Owner DATANG MICROELECTRONICS TECH CO LTD
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