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RISC-V

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Unlike most other ISA designs, the RISC-V ISA is provided under open source licenses that do not require fees to use. A number of companies are offering or have announced RISC-V hardware, open source operating systems with RISC-V support are available and the instruction set is supported in several popular software toolchains.

Notable features of the RISC-V ISA include a load–store architecture, bit patterns to simplify the multiplexers in a CPU, IEEE 754 floating-point, a design that is architecturally neutral, and placing most-significant bits at a fixed location to speed sign extension. The instruction set is designed for a wide range of uses. The base instruction set has a fixed length of 32-bit naturally aligned instructions, and the ISA supports variable length extensions where each instruction could be an any number of 16-bit parcels in length. Subsets support small embedded systems, personal computers, supercomputers with vector processors, and warehouse-scale 19 inch rack-mounted parallel computers.

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quard_star_tutorial

This project aims to build an Embedded Linux System, in order to analyze the chip from the power-on execution of the first instruction to the entire system running, based on qemu simulator development board. 本项目旨在真正从0开始构建嵌入式linux系统,为了剖析芯片从上电开始执行第一条指令到整个系统运行,基于qemu定制模拟器开发板。

  • Updated Sep 12, 2024
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