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Bao Hypervisor Demo with two FreeRTOS

This is a forked repository from: https://github.com/bao-project/bao-demos

This repository runs two FreeRTOS on the top of Bao Hypervisor. Each FreeRTOS print in a different virtual serial port on Qemu.

-1. Install dependencies

sudo apt install ninja-build u-boot-tools pandoc

0. Download and setup the toolchain

b) For RISC-V, use the riscv64-unknown-elf- toolchain.

Download it from [SiFive's Freedom Tools][riscv-toolchains] github reposiroty.

Install the toolchain. Then, set the CROSS_COMPILE environment variable with the reference toolchain prefix path:

export CROSS_COMPILE=/path/to/toolchain/install/dir/bin/your-toolchain-prefix-

1. Setup base environment

Clone this repo and cd to it:

git clone https://github.com/ruizjuanpablo/bao-demos.git
cd bao-demos

Setup your target platform for RISC-V, your demo for two FreeRTOS and the architecture:

export PLATFORM=qemu-riscv64-virt
export DEMO=freertos+freertos
export ARCH=riscv

2. Use automated make

Just execute:

make -j$(nproc)

And all the needed source and images will be automatically downloaded and built. The makefiles will also print some instructions for you to carry out when it is not possible to automate a given step for some reason (e.g. download behind authentication wall). It will also print the instructions on how to deploy the images on your target platform. To quiet instructions pass NO_INSTRUCTIONS=1 to make.

WARNING

The makefiles will automatically accept end-user license agreements (EULAs) on your behalf for some of the downloaded firmware. If you wish to be prompted to accept them manually, pass ALWAYS_ASK=1 to make.

3. Run Qemu with the compiled image

Execute the following command to run Qemu with the compiled image.

wrkdir/srcs/qemu/build/qemu-system-riscv64 -nographic \
    -M virt -cpu rv64,priv_spec=v1.10.0,x-h=true -m 4G -smp 4 \
    -bios wrkdir/imgs/qemu-riscv64-virt/freertos+freertos/opensbi.elf \
    -S -serial pty -chardev pty,id=serial1 -serial chardev:serial1

When it started, it will print the char device serial port redirection. You can open two other terminals to get the serial port outputs. Then, continue the Qemu emulation by pressing Ctrl+A to enable qemu terminal, and then "c" Enter to continue the emulation.

To exit Qemu, press "q" Enter.