Method for reporting interruption and PCI bus system

Abstract

The invention provides a method for reporting interruption and a bus system of peripheral component interconnect (PCI). A bus interruption agent is connected with the PCI bus, wherein the method comprises the following steps: the bus interruption agent monitors event information on the PCI bus; after the event information written to the event address space of the PCI is monitored, the bus interruption agent judges whether the event information written to the event address space meets the triggering interruption condition or not; if yes, interruption is sent to the CUP to trigger the CPU to perform polling on each event address space of the PCI; and if not, the interruption is not sent. The invention can reduce the burden of the CPU, and ensure that the event can be solved in time.

Description

technical field [0001] The invention relates to network communication technology, in particular to a method for reporting interruption, a PCI bus system and a bus interruption agent. Background technique [0002] With the continuous development of communication technology and the improvement of high-speed transmission requirements, the technology of separating data and control in network equipment has emerged as the times require, that is, in network equipment, the Peripheral Component Interconnect (PCI, Peripheral Component Interconnect) bus is used as the CPU and The control channel between PCI devices adopts the system packet interface (SPI-4, System Packet Interface Level 4) bus as the data channel between the CPU and PCI devices, which not only makes full use of the high-speed transmission advantages of the SPI-4 bus, but also can Processing control information separately improves efficiency. [0003] The invention mainly relates to the transmission and processing of c...

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned method of the prior art, the CPU polls each PCI event address space at regular intervals according to the timer, which may cause the following defects: one, if the PCI device does not have an event message to write into the PCI Event address space, that is, no event needs to be processed by the CPU, and the CPU will still poll according to the timer. Starting the timer needs to occupy system resources, which will inevitably increase the burden on the CPU and reduce the efficiency of the software

Its two, at certain time event generation is very frequent, if the generation frequency of event is greater than the regular frequency of timer, then may cause the event message in the PCI event address space to be covered by new event message again when being processed in time, namely The timing query speed cannot keep up with the update speed of event messages, resulting in event loss and other consequences

Third, usually some important or urgent events do not occur frequently, but these events need to be dealt with immediately, otherwise it may cause serious consequences such as data loss. Obviously, the polling method according to the timer in the prior art does not There is no guarantee that important or urgent incidents will be dealt with immediately

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