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Programmable-input/output (PIO) writing merging device based on distributed arbitration and method

An input-output, distributed technology, applied in the field of data communication, which can solve problems such as crossover disorder, difficulty in completing I/O devices, and complex PIO write and merge.

Active Publication Date: 2018-03-30
深圳市楠菲微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When multiple applications access the device concurrently, PIO write requests will be crossed out of order, which makes PIO write merging more complicated and I / O device completion difficult

Method used

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  • Programmable-input/output (PIO) writing merging device based on distributed arbitration and method
  • Programmable-input/output (PIO) writing merging device based on distributed arbitration and method
  • Programmable-input/output (PIO) writing merging device based on distributed arbitration and method

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Embodiment Construction

[0026] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0027] figure 1 It is a schematic structural diagram of a PIO write merging device based on distributed arbitration provided by an embodiment of the present invention. like figure 1 As shown, the embodiment of the present invention provides a PIO write merging device based on distributed arbitration, which includes: at least one write merging buffer module 2, at least one distributed arbiter module 3, and PIO interface module 1, wherein the Each write-merge buffer module 2 in the at least one write-merge buffer module 2 corresponds to a distributed arbiter module, and the PIO in...

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PUM

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Abstract

The embodiment of the invention provides a programmable-input / output (PIO) writing merging device based on distributed arbitration and a method, and belongs to the field of data communication. Each writing merging buffer module in at least one writing merging buffer module corresponds to a distributed arbiter module. A PIO interface module is used for processing received PIO writing requests intoa format which is suitable for the at least one writing merging buffer module, wherein the PIO writing requests include a writing address and written data. Each writing merging buffer module is used for receiving the PIO writing requests. The writing merging buffer module storing a buffer address which is the same as the writing address outputs a hit signal. Each distributed arbiter module is usedfor outputting an enabling signal to enable the corresponding writing merging buffer module to write the written data according to an address offset of the writing address when the hit signal is received. According to the device, realization is easy, expansibility is good, generality is high, and a data processing process can be simplified as much as possible.

Description

technical field [0001] The invention relates to data communication, in particular to a PIO write merging device and method based on distributed arbitration. Background technique [0002] In the prior art, the CPU accesses the I / O device through the PIO instruction. According to the difference of the word length of the CPU, the data length in the PIO instruction is usually 1 / 2 / 4 / 8 bytes. When the word length of the I / O device is greater than the word length of the CPU, for example, the word length of the CPU is 4 bytes, and the register access granularity inside the I / O device is fixed at 8 bytes, and the CPU will issue two consecutive addresses when accessing the device registers. For a 4-byte PIO write request, the I / O device must be able to support combining multiple PIO requests to complete a register write operation. When multiple applications access the device concurrently, PIO write requests will be crossed and out of order, which makes PIO write merging more complica...

Claims

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Application Information

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IPC IPC(8): G06F13/28G06F13/40
CPCG06F13/28G06F13/4009G06F13/4031G06F13/404
Inventor 王克非张磊徐亚东黄文斌
Owner 深圳市楠菲微电子有限公司
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