In order to learn kernel development, the big guy created a lightweight operating system YiYiYa OS

aleksib

In order to learn kernel development, the big guy created a lightweight operating system YiYiYa OS [Copy link]

 

 YiYiYa operating system is a simple operating system that pursues rapid development, minimum implementation, and follows the SOLID principle. The coding is concise and clear, which is very suitable for students who are learning operating systems. At present, there are both macro kernels and micro kernel architectures that have been gradually implemented. In the future, there will be hybrid kernels. At present, YiYiYa OS supports many architectures and platforms, including ARM-Cortex A7 series V3s, T113-S3 and other chips, ARM9 core F1C series chips and some RISC-V core chips. All transplantation tutorials and methods are open on Github.   # System architecture The architecture is designed in layers from top to bottom, and the same layer is modules from left to right. The lower the layer is from the user, the more general and public it will become. The layered design is easy to expand and maintain, and each layer has a single responsibility, so that each layer's dependencies are fixed and will not be called randomly (to achieve low coupling). At the same time, the high-level layer depends on the bottom layer and the interface, not on the specific details of the implementation. The changes in the bottom layer will not have too much impact. This is the basic design principle.  ## Application layer The application layer directly deals with user operations. There are graphical interfaces and shell command interactions. This layer is for user development applications and common libraries, and the corresponding source code directory is app.  ## Application layer The application layer directly deals with user operations. There are graphical interfaces and shell command interactions. This layer is for user-developed applications and common libraries, and the corresponding source code directory is app. ## Interface layer (C standard library) The interface layer is the basic functions provided by the operating system kernel to the outer kernel. Through libc and libmusl, the basic standard library is implemented to facilitate developers to directly port code or adapt application app. ## Kernel layer The kernel layer is the core domain business. Each small module provides basic functions. According to their respective responsibilities, they correspond to the traditional kernel layer. The kernel layer is the core domain business. Each small module provides basic functions. According to their respective responsibilities, they correspond to the memory management, process communication, file system, process communication, etc. of the traditional operating system. When evolving the operating system, you can modify this, and the corresponding source code directory is kernel. ## Infrastructure layer (public layer and hardware layer) Use hardware CPU related and platform module related separately as public libraries. The directories are arch, platform, libs/kernel. When porting and adapting, you basically deal with these modules more. At the same time, a single library can improve the reusability of kernel code. The kernel has a dedicated kernel library to increase code security and reduce errors.  * Support Lizhi Pi series development boards, Allwinner V3s, F1C200S, T113-S3 and other chips, RISC-V support is in planning* Support uboot to boot the kernel, and also support the boot mode without uboot* Support LCD screen, st7789, st7735, general 40pin rgb screen* Support vfs, fat32 file formats* Support elf files, ipc pipes, etc.* Support ahci, gpio, i2c, spi drivers, etc.# System transplantation tutorial The operating system used by the open source handheld FunKey made by the author and his team is based on the Linux kernel and YiYiYa OS, YiYiYa The OS provides a rich desktop system and game development framework. Its very simple porting process also allows developers to easily use YiYiYa OS bare metal to develop their own devices. Taking the FunKey handheld game console developed based on T113-S3 as an example, when porting the platform, you need to add the gpio.h header file in the newly added duck/platform directory and write init.c containing basic serial port functions, and then perform the following three steps to easily run YiYiYa OS: Clone the project``` git clone https://github.com/evilbinary/YiYiYa.git make pull ``` Install the build tool``` pip install yymake ``` Compile``` ya -m debug -p t113-s3 -r t113-s3 ```  #Other functions and open source data acquisition Overall, the YiYiYa operating system is very lightweight, supports the POSIX operating system standard protocol, and also supports extensions, making it easy to develop modules in other languages. At the application layer, applications can be developed through the libc/libmusl standard library and commonly used libraries; at the kernel layer, the functions of basic kernel modules and shared libraries can be called, and developers can choose by themselves during the DIY process.   

freebsder

This is amazing

hellokitty_bean

You are indeed a master... Just rub it with your own hands and it will be done! ! ! ! ! ! ! ! ! ! Respect!

振动试验仪器

Thanks for sharing

q1233

Thanks for sharing! Thanks for sharing! Thanks for sharing! Thanks for sharing! Thanks for sharing!