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Script for raspberry pi emulation. Will create a QEMU vm with fresh raspian. https://azeria-labs.com/emulate-raspberry-pi-with-qemu/
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#!/bin/bash | |
set -euo pipefail | |
RED='\033[0;31m' | |
GREEN='\033[0;32m' | |
BLUE='\033[0;34m' | |
NC='\033[0m' | |
GIB_IN_BYTES="1073741824" | |
target="${1:-pi1}" | |
image_path="./sdcard/filesystem.img" | |
kernel_version="5.10.63-bullseye" | |
kernel_path="./kernel/kernel-qemu-$kernel_version" | |
xz_path="./filesystem.xz" | |
filesystem_image="https://downloads.raspberrypi.org/raspios_lite_arm64/images/raspios_lite_arm64-2022-04-07/2022-04-04-raspios-bullseye-arm64-lite.img.xz" | |
rpi_kernel="https://github.com/dhruvvyas90/qemu-rpi-kernel/archive/86571772bb993c28bf8b925c202bc66dc63bcd45.zip" | |
fat_folder="./fat" | |
mkdir -p sdcard | |
mkdir -p kernel | |
if [ ! -e $image_path ]; then | |
echo -e "${RED}No filesystem detected at ${image_path}!" | |
echo -e "${BLUE}Downloading filesystem${NC}" | |
wget -O filesystem.xz $filesystem_image | |
echo -e "${GREEN}Filesystem downloaded.${NC}" | |
fi | |
if [ -e $xz_path ]; then | |
echo -e "${BLUE}Extracting fresh filesystem...${NC}" | |
unxz $xz_path | |
mv -- filesystem "$image_path" | |
fi | |
echo -e "${BLUE}Preparing filesystem image${NC}" | |
qemu-img info $image_path | |
image_size_in_bytes=$(qemu-img info --output json $image_path | grep "virtual-size" | awk '{print $2}' | sed 's/,//') | |
if [[ "$(($image_size_in_bytes % ($GIB_IN_BYTES * 2)))" != "0" ]]; then | |
new_size_in_gib=$((($image_size_in_bytes / ($GIB_IN_BYTES * 2) + 1) * 2)) | |
echo -e "${BLUE}Rounding image size up to ${new_size_in_gib}GiB so it's a multiple of 2GiB...${NC}" | |
qemu-img resize $image_path "${new_size_in_gib}G" | |
fi | |
if [ ! -e $kernel_path ]; then | |
echo -e "{$BLUE}Preparing Kernel${NC}" | |
cd kernel | |
wget -O qemu-rpi-kernel.zip $rpi_kernel | |
unzip qemu-rpi-kernel.zip | |
cp qemu-rpi-kernel-*/kernel-qemu-$kernel_version . | |
cp qemu-rpi-kernel-*/versatile-pb.dtb . | |
rm qemu-rpi-kernel.zip | |
rm -rf qemu-rpi-kernel-* | |
cd .. | |
fi | |
root=/dev/mmcblk0p2 | |
kernel="" | |
if [ "${target}" = "pi1" ]; then | |
emulator=qemu-system-arm | |
kernel="./kernel/kernel-qemu-$kernel_version" | |
dtb="./kernel/versatile-pb.dtb" | |
machine=versatilepb | |
memory=256m | |
root=/dev/sda2 | |
nic="--net nic --net user,hostfwd=tcp::5022-:22" | |
kernel_pattern="" | |
elif [ "${target}" = "pi2" ]; then | |
emulator=qemu-system-arm | |
machine=raspi2b | |
memory=1024m | |
kernel_pattern=kernel7.img | |
dtb_pattern=bcm2709-rpi-2-b.dtb | |
append="dwc_otg.fiq_fsm_enable=0" | |
nic="-netdev user,id=net0,hostfwd=tcp::5022-:22 -device usb-net,netdev=net0" | |
elif [ "${target}" = "pi3" ]; then | |
emulator=qemu-system-aarch64 | |
machine=raspi3b | |
memory=1024m | |
kernel_pattern=kernel8.img | |
dtb_pattern=bcm2710-rpi-3-b-plus.dtb | |
append="dwc_otg.fiq_fsm_enable=0" | |
nic="-netdev user,id=net0,hostfwd=tcp::5022-:22 -device usb-net,netdev=net0" | |
else | |
echo "Target ${target} not supported" | |
echo "Supported targets: pi1 pi2 pi3" | |
exit 2 | |
fi | |
if [ -z "$kernel" ]; then | |
echo "Searching for kernel='${kernel_pattern}'" | |
kernel=$(find "${fat_folder}" -name "${kernel_pattern}") | |
fi | |
echo "Searching for dtb='${dtb_pattern}'" | |
dtb=$(find "${fat_folder}" -name "${dtb_pattern}") | |
if [ -z "${kernel}" ] && [ -z "${dtb}" ]; then | |
fat_path="./fat.img" | |
echo -e "{$NC}Extracting partitions" | |
/sbin/fdisk -l ${image_path} \ | |
| awk '/^[^ ]*1/{print $2, $4}' \ | |
| while read s c; do | |
dd if=sdcard/filesystem.img of=fat.img bs=512 skip=$s count=$c | |
done | |
echo "Extracting boot filesystem" | |
mkdir -p "${fat_folder}" | |
fatcat -x "${fat_folder}" "${fat_path}" | |
echo "Searching for kernel='${kernel_pattern}'" | |
kernel=$(find "${fat_folder}" -name "${kernel_pattern}") | |
echo "Searching for dtb='${dtb_pattern}'" | |
dtb=$(find "${fat_folder}" -name "${dtb_pattern}") | |
fi | |
if [ "${kernel}" = "" ] || [ "${dtb}" = "" ]; then | |
echo -e "{$RED}Missing kernel='${kernel}' or dtb='${dtb}'" | |
exit 2 | |
fi | |
echo -e "${GREEN}Booting QEMU machine \"${machine}\" with kernel=${kernel} dtb=${dtb}${NC}" | |
exec ${emulator} \ | |
--machine "${machine}" \ | |
--cpu arm1176 \ | |
--m "${memory}" \ | |
--drive "format=raw,file=${image_path}" \ | |
${nic} \ | |
--dtb "${dtb}" \ | |
--kernel "${kernel}" \ | |
--append "rw earlyprintk loglevel=8 console=ttyAMA0,115200 dwc_otg.lpm_enable=0 root=${root} rootwait panic=1 ${append} rootfstype=ext4 fsck.repair=yes" \ | |
--no-reboot \ | |
--display none \ | |
--serial mon:stdio |
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