Extensible multi-output interrupt controller

Abstract

The invention discloses an extensible multi-output interrupt controller, including an interrupt information module, wherein the input end of the interrupt information module is connected with a plurality of processor cores to prepare interrupt information; the input end of the interrupt information module is also connected with a plurality of interrupt sources to receive a plurality of different interrupt signals; the output end of the interrupt information module is respectively connected with a plurality of same interrupt control modules to send an effective interrupt source highest prioritysignal to each interrupt control module; and each interrupt control module is correspondingly connected with one processor core, and each interrupt control module performs interrupt information interaction with the processor core so as to control interrupt of the processor core. The extensible multi-output interrupt controller provided by the invention has good expansibility on the number of processors and interrupt sources.

Description

technical field [0001] The invention belongs to the technical field of interrupt control of embedded processors, and in particular relates to an expandable multi-output interrupt controller. Background technique [0002] With the development of microprocessors, improving work efficiency and reducing system power consumption have become the main development trend, thus introducing interrupts. Interruption means that when the processor is working, due to internal or external emergencies, the processor has to suspend the current work and jump to the interrupt program. After the interrupt program is executed, it returns to the previously suspended program to continue working. Interruptions occur randomly during this process. [0003] As the performance of the processor is getting higher and higher, the requirements for the main frequency are constantly increasing, thus introducing multi-core processors, and there are more and more types of interrupts, so the interrupt control i...

AI Technical Summary

Problems solved by technology

Many companies at home and abroad have done a lot of related research, such as ARM's GIC protocol, its circuit structure is complex, because it needs to provide interrupts in multi-processor systems, it is usually suitable for large-scale system design, but for systems with fewer cores There will be a lot of hardware overhead, such as the MPIC protocol proposed by IBM based on the Open PIC protocol, which supports up to four processors and up to 128 interrupt sources, and the scalability of the number of processors and interrupt sources is not enough.

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