As an open-source processor instruction, RISC-V has a promising future. It is now mainly used in AI, embedded, and other fields. There is still little sense of existence in the mobile phone field. The main reason is that the Android system does not support RISC-V enough.
Today, Alibaba announced an important development. It's Pingtou Semiconductor completed the porting of Android 10 to RISC-V and open source all related codes.
Judging from the information released by the Pingtou community, the Android 10 system can already run smoothly on the Xuantie 910 chip.
It is understood that Pingtou has implemented support for the RISC-V architecture based on the Android Open Source Project (AOSP). The Android software stack mainly includes nearly a thousand software packages at five levels: system kernel, hardware abstraction, runtime, framework layer, and application. The migration work related to processor architecture mainly includes ** local library and ART support, Linux kernel support The build system supports three major parts:
Native library and ART support: complete RISC-V architecture support for bionic, ART, Clang/LLVM, V8, NDK, VNDK, OpenGL, and other software packages: add dynamic link, system call, floating-point math library support for bionic; based on ART It has realized the DEX real-time interpretation execution, dex2oat, JNI call and JIT compilation optimization of the RISC-V architecture, which greatly improves the efficiency of JAVA program execution on the RISC-V platform.
Linux kernel support: Improved the Clang/LLVM compilation support for the Linux kernel, repaired a large number of Clang/LLVM problems, and adapted the Linux kernel of the RISC-V architecture to the Android system for the first time.
Build system support: **Android's compilation framework is mainly composed of blueprint and soong. Pingtou integrates the compilation framework, pre-compiled toolchain, local method library, simulator, application, and service modules, and realizes the RISC-V architecture for the first time. Android build system support.
In July 2019, Pingtou Semiconductor, a subsidiary of Alibaba, released the Xuantie 910 processor, which is currently the strongest RISC-V processor in the industry.
According to reports, Xuan Tie 910 can be used to design and manufacture high-performance end-of-the-line chips for applications in 5G, artificial intelligence, and autonomous driving.
It is understood that the Xuantie 910 single-core performance reaches 7.1 Coremark/MHz and the main frequency reaches 2.5GHz, which is more than 40% higher than the current industry's best RISC-V processor.
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