Design And Implementation Of Multi-intercore Task Synchronization And Communication Based On AMP

As embedded application fields become complex increasingly, it requests much more higher processor performance and lower power consumption. More and more embedded applications use multi-core processors as CPU of its hardware development platform. However, the operating system supported multi-core processors currently at home and abroad are rare.Based on the analysis of the spaceflight application requirements and the hardware features of multi-core processors, this design adopts the operating system architecture of AMP (asymmetric mulitiprocessing) to extend an operating system in existence, and implements a communication system of multi-core based on the share memory. it provides effective support for practical applications.The system uses a hierarchical design to complete two layers work mainly.The layer of multi-core communication consists of multi-intercore semaphores and multi-intercore message queues. The other layer is multi-core basic services that includes shared memory management, shared resource access control, multi-core inter-interrupt handling. The system of multi-core communication achieved by this method has been successfully integrated in a particular spaceflight operating system, and runs stably. Actual results show that the multi-core communication system is a relatively independent, reliable, strong real-time systems.