RISC-V Emulator and Linux System from Scratch

This repo contains all the source code required to follow the blog post at https://werwolv.net/posts/linux_bringup/

- /libcontains the entire rv32ima instruction set emulator code as well as a minimal set of emulated devices

- /maincontains the configuration for our machine and functions exposed for WebAssembly use

All the config files required to build Linux can be found in /boot. The main executable also expects all the built binaries to be in the boot folder.

- riscv32-unknown-linux-gnu.configis the crosstool-ng toolchain config file

- riscv_emulator_defconfigis the Linux Kernel config file

- device_tree.dtsis the minimal device tree- Can be compiled to a dtb using dtc -I dts -O dtb device_tree.dts -o device_tree.dtb

- Can be compiled to a dtb using

- init.cis the init program- Can be compiled using riscv32-unknown-linux-gnu-gcc -static init.c -o init

- Can be compiled using

- initramfs.txtis the- gen_init_cpioconfig file to generate the initramfs- Can be compiled to a cpio using usr/gen_init_cpio initramfs.txt -o initramfs.cpio

- Can be compiled to a cpio using