Communication method and device for PCI (peripheral component interconnect) equipment and system memory

A PCI device and system memory technology, applied in the computer field, can solve the problem that the CPU and the PCI device cannot communicate, and achieve the effect of convenient use

Active Publication Date: 2012-11-28
TCL CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a communication method between a PCI device and a system memory, aiming at solving the problem that the communication between the CPU and the PCI device cannot be carried out because the address range of the system memory is larger than the addressing range of the PCI

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  • Communication method and device for PCI (peripheral component interconnect) equipment and system memory
  • Communication method and device for PCI (peripheral component interconnect) equipment and system memory

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] In the embodiment of the present invention, by setting a memory forwarding area in the shared space between the PCI device and the system memory, system memory addresses beyond the addressing range of the PCI device can realize communication with the PCI device through the memory forwarding area.

[0024] figure 1 The flowchart of the communication method between the PCI device and the system memory provided by the embodiment of the present invention is shown.

[0025] In step S101, when a PCI device is connected to the computer system, the address range of the system memory and the address...

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Abstract

The invention belongs to the technical field of computers, and discloses a communication method and device of PCI (peripheral component interconnect) equipment and a system memory. The method comprises the following steps: acquiring the address range of the system memory and the addressing range of the PCI equipment; determining whether the address range of the system memory completely belongs tothe addressing range of the PCI equipment; and executing the following steps when a part of the address range of the system memory exceeds the addressing range of the PCI equipment: constructing the mapping relationship between the PCI equipment and the address of the system memory in the addressing range to achieve communication; setting a memory address forwarding area; and controlling the address of the system memory out of the addressing range of the PCI equipment to communicate with the PCI equipment through the memory address forwarding area. The method solves the problem that the CPU memory address out of the addressing range of the PCI equipment can not be communicated with the PCI equipment because the system memory address is larger than the addressing range of the PCI equipment, thereby providing great convenience for the application of a user.

Description

technical field [0001] The invention belongs to the technical field of computers, and in particular relates to a communication method and device for PCI equipment and system memory. Background technique [0002] The PCI slot is an expansion slot based on the PCI local bus, located below the Accelerate Graphical Port (AGP) slot on the motherboard and above the Industrial Standard Architecture (ISA) slot. Its bit width is 32 bits or 64 bits, the working frequency is generally 33MHz, and the general maximum data transfer rate is 133MB / sec (32 bits) and 266MB / sec (64 bits). PCI slot can be plugged with graphics card, sound card, network card, built-in Modem, built-in ADSL Modem, USB2.0 card, IEEE1394 card, IDE interface card, RAID card, TV card, video capture card and other various expansion cards. The PCI slot is the main expansion slot of the motherboard. By plugging in different expansion cards, almost all the functions that the current computer can achieve can be obtained. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/02G06F13/16
Inventor 刘纹高
Owner TCL CORPORATION
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