PCI总线空间配置原理及具体实现

The principle and specific implementation of PCI bus space configuration

PCI总线属于处理器系统的局部总线范畴,作为系统总线的延伸,PCI总线的主要目的是为了连接处理器与外部设备。自从PCI总线规范提出以后,迅速得到了广大厂商的认可与推广,进而在处理器体系结构中始终占据着重要的位置。从软件使用的角度来看,PCI总线的空间配置属于一项重要内容。通过分析PCI总线空间配置的基本原理,并且结合PPC处理器架构下PCI设备空间配置的具体要求,详细介绍了软件使用层面的PCI配置原理及技术实现细节,并且给出了相关的示例代码。

Peripheral component interconnect(PCI)bus belongs to the local bus category of the processor system,as an extension of the system bus,the main purpose of PCI bus is to connect the processor and external devices.Since the PCI bus specification was proposed,it has been rapidly recognized and promoted by the majority of manu-facturers,and has always occupied an important position in the processor architecture.From the perspective of soft-ware use,the spatial configuration of PCI bus is an important content.By analyzing the basic principle of PCI bus space configuration,and combining with the specific requirements of PCI device space configuration under PPC processor architecture,this paper introduces the PCI configuration principle and technical implementation details at the software use level in detail,and gives the relevant example code.