# This is a developer quickstart guide for a tethered boot. If you're looking
# for an enduser guide see: https://github.com/AsahiLinux/docs/wiki/Debian
# If you find errors or I should have elaborated more to get you going faster,
# please let me know in IRC. My nick is Glanzmann or drop me an email at
# thomas@glanzmann.de

# Boot into macos

# Extract the firmware and save it somewhere you have access to.
# This firmware needs to be extracted later in /lib/firmware

curl -sL tg.st/u/fwx.sh | sh

# Make space. The last number is the size that MacOS instatllation should
# consume. The minimum recommended is 100 GB to be able to apply updates later
# on easily.

diskutil apfs resizeContainer disk0s2 100GB

# Run the installer, select MacOS 12.1 as stub OS version, in the boot picker
# you're supposed to click Restart than return to the shell and wait until the
# installer is finished and press Return to shutdown your system.

curl -L https://mrcn.st/alxsh | sh

# Wait for the system to shutdown and the LEDs turn off. Than wait another 10
# seconds. Now press and do _not_ let go of the power button for 15 seconds.
# If you screw up the power button holding, turn the System off by pressing the
# power button until it is off and start from the beginning of this paragraph.
# In the boot picker, select 'Options' and select Utilities > Terminal. In this
# terminal execute:

/Volumes/Linux/step2.sh

# Create an EFI parition because the final layout will have that

diskutil list
diskutil addPartition <identifier before free space> %EFI% LB 512MB

# Create partition to hold a rootfs (minimum 1GB if you want to use the rootfs below)

diskutil list
diskutil addPartition <identifier before free space> %Linux% %noformat% <size>

# dd a Debian Testing rootfs on it (minimum size 1GB)
# Find the scripts to create that rootfs here: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/m1-debian

curl -L https://tg.st/u/m1.tgz | tar -xOz | dd of=/dev/<identifier of Linux Filesystem> bs=8m

# Build dependencies
sudo apt install -y gcc-aarch64-linux-gnu libc6-dev-arm64-cross device-tree-compiler imagemagick build-essential bc kmod flex cpio libncurses5-dev libelf-dev:native bison libssl-dev

# Crosscompile the kernel
git clone --depth 1 https://github.com/AsahiLinux/linux
cd linux
curl -s https://tg.st/u/9ce9060dea91951a330feeeda3ad636bc88c642c.patch | git am -
curl -s https://tg.st/u/5nly | git am -
curl -s https://tg.st/u/config-2022-01-28 > .config
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- olddefconfig
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j32 Image.gz dtbs
cd ..

# build m1n1
git clone --recursive https://github.com/AsahiLinux/m1n1.git
cd m1n1
make

# Export the control device for the proxyclient and friends
export M1N1DEVICE=/dev/ttyACM0

# chainload m1n1 so that you have the latest features available
./proxyclient/tools/chainload.py build/m1n1.macho

# Enable PCIe for wifi
python3 ./proxyclient/experiments/pcie_enable_devices.py

# Pick the dtb for your device: https://github.com/AsahiLinux/docs/wiki/Devices
proxyclient/tools/linux.py --bootargs="net.ifnames=0 rw root=/dev/nvme0n1p5 rootwait rootfstype=ext4" ../linux/arch/arm64/boot/Image.gz ../linux/arch/arm64/boot/dts/apple/t8103-j293.dtb