Operation control method suitable for incompletely symmetric multi-processing microcontroller and operating system

Abstract

The invention discloses an operation control method suitable for an incompletely symmetric multi-processing microcontroller and an operating system. According to the operation control method, a privilege processor is responsible for process scheduling and resource allocation among multiple processors, all the processors process process scheduling and resource allocation within a single processor,and the multiple processors carry out data exchange through inter-core communication IPC. An embedded operating system comprises the functions of task scheduling, driver management and application tool chains, through a process manager, a driver manager and a compiler linker of an application of the invention, the goal of the coordinated control of multiple processing cores under a single system is achieved, thereby the system execution efficiency is improved, and the complexity of application design is reduced.

Description

technical field [0001] The invention belongs to the technical field of embedded operating systems, and in particular relates to an operation control method suitable for incompletely symmetrical multi-processing microcontrollers. Background technique [0002] Generally speaking, the microcontroller platform is mainly based on single-core processors, but with the enhancement of semiconductor technology and technology improvement, more and more microcontrollers adopt multi-core design, such as Ti's F28377D and F28379D Wait. These multi-processors for microcontrollers are different from common symmetric multi-processors [such as application multi-processors], and the cores of each processor are not completely symmetrical, mainly in: [0003] (1) Each processor has its own independent memory space [including program space], and processors cannot read and write to access the independent memory space of other processors. [0004] (2) There is a certain amount of shared memory [in...

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Problems solved by technology

[0003] (1) The processors have their own independent memory space [including program space], and the independent memory space of other processors cannot be read and written between processors.

[0004] (2) There is a certain amount of shared memory [including the memory space of peripherals] between processors, but the shared memory space cannot realize implicit write sharing, and a specific processor [privileged processor] must explicitly operate a part of it. The write permission of the memory is assigned to other processors. After the division, if no explicit operation is performed again, other processors only have read access to the memory in this area.

[0005] (3) The shared memory between processors is generally in high memory and cannot be addressed as a stack

[0006] In addition, due to the needs of the application environment, the microcontroller multi-processor also lacks a memory management unit [MMU], and cannot provide support for virtual memory like the application multi-processor.

[0007] The operating systems applicable to embedded systems can only support single-core or standard symmetric multiprocessors. For this kind of non-completely symmetric microcontroller multiprocessor, the existing embedded system can only divide the multi-core into independent The processors are independently controlled by different systems, and it is impossible to coordinate and control multiple cores under a single system

[0008] For multi-core processors, if multiple cores cannot be coordinated and controlled in a single system, but only divided into independent cores to be controlled by different operating systems, the overall execution efficiency of the system and the complexity of applications will be greatly affected. Have a great impact

It is difficult to switch processes between different operating systems, so it is easy to have unbalanced load, which affects the overall execution efficiency of the system

At the same time, because some peripherals may be shared between applications of different systems, the scheduling of drivers will become complicated and cumbersome

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