# m1n1: an experimentation playground for Apple Silicon

(And to some extent a Linux bootloader)

## Building

You need an `aarch64-linux-gnu-gcc` cross-compiler toolchain (or a native one, if running on ARM64).
You also need `dtc` (the devicetree compiler) and `convert` (from ImageMagick) for the boot logos.

```shell
$ git clone --recursive https://github.com/AsahiLinux/m1n1.git
$ cd m1n1
$ make
```

The output will be in build/m1n1.macho.

To build on a native arm64 machine, use `make ARCH=`.

Building on ARM64 macOS is supported with clang and LLVM; you need to use Homebrew to
install the required dependencies:

```shell
$ brew install llvm imagemagick dtc
```

After that, just type `make`.

### Building using the container setup

If you have a container runtime installed, like Podman or Docker, you can make use of the compose setup, which contains all build dependencies.

```shell
$ git clone --recursive https://github.com/AsahiLinux/m1n1.git
$ cd m1n1
$ podman-compose run m1n1 make
$ # or
$ docker-compose run m1n1 make
```

## Usage

Our [developer quickstart](https://github.com/AsahiLinux/docs/wiki/Developer-Quickstart#using-m1n1)
guide has more information on how to use m1n1.

To install on an OS container based on macOS <12.1, use `m1n1.macho`:

```shell
kmutil configure-boot -c m1n1.macho -v <path to your OS volume>
```

To install on an OS container based on macOS >=12.1, use `m1n1.bin`:

```shell
kmutil configure-boot -c m1n1.bin --raw --entry-point 2048 --lowest-virtual-address 0 -v <path to your OS volume>
```

## Payloads

m1n1 supports running payloads by simple concatenation:

```shell
$ cat build/m1n1.macho Image.gz build/dtb/apple-j274.dtb initramfs.cpio.gz > m1n1-payload.macho
$ cat build/m1n1.bin Image.gz build/dtb/apple-j274.dtb initramfs.cpio.gz > m1n1-payload.bin
```

Supported payload file formats:

* Kernel images (or compatible). Must be compressed or last payload.
* Devicetree blobs (FDT). May be uncompressed or compressed.
* Initramfs cpio images. Must be compressed.

Supported compression formats:

* gzip
* xz

## License

m1n1 is licensed under the MIT license, as included in the [LICENSE](LICENSE) file.

* Copyright The Asahi Linux Contributors

Please see the Git history for authorship information.

Portions of m1n1 are based on mini:

* Copyright (C) 2008-2010 Hector Martin "marcan" <marcan@marcan.st>
* Copyright (C) 2008-2010 Sven Peter <sven@svenpeter.dev>
* Copyright (C) 2008-2010 Andre Heider <a.heider@gmail.com>

m1n1 embeds libfdt, which is dual [BSD](3rdparty_licenses/LICENSE.BSD-2.libfdt) and
[GPL-2](3rdparty_licenses/LICENSE.GPL-2) licensed and copyright:

* Copyright (C) 2014 David Gibson <david@gibson.dropbear.id.au>
* Copyright (C) 2018 embedded brains GmbH
* Copyright (C) 2006-2012 David Gibson, IBM Corporation.
* Copyright (C) 2012 David Gibson, IBM Corporation.
* Copyright 2012 Kim Phillips, Freescale Semiconductor.
* Copyright (C) 2016 Free Electrons
* Copyright (C) 2016 NextThing Co.

The ADT code in mini is also based on libfdt and subject to the same license.

m1n1 embeds [minlzma](https://github.com/ionescu007/minlzma), which is
[MIT](3rdparty_licenses/LICENSE.minlzma) licensed and copyright:

* Copyright (c) 2020 Alex Ionescu

m1n1 embeds a slightly modified version of [tinf](https://github.com/jibsen/tinf), which is
[ZLIB](3rdparty_licenses/LICENSE.tinf) licensed and copyright:

* Copyright (c) 2003-2019 Joergen Ibsen

m1n1 embeds portions taken from
[arm-trusted-firmware](https://github.com/ARM-software/arm-trusted-firmware), which is
[BSD](3rdparty_licenses/LICENSE.BSD-3.arm) licensed and copyright:

* Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.

m1n1 embeds [Doug Lea's malloc](ftp://gee.cs.oswego.edu/pub/misc/malloc.c) (dlmalloc), which is in
the public domain ([CC0](3rdparty_licenses/LICENSE.CC0)).

m1n1 embeds portions of [PDCLib](https://github.com/DevSolar/pdclib), which is in the public
domain ([CC0](3rdparty_licenses/LICENSE.CC0)).

m1n1 embeds the [Source Code Pro](https://github.com/adobe-fonts/source-code-pro) font, which is
licensed under the [OFL-1.1](3rdparty_licenses/LICENSE.OFL-1.1) license and copyright:

* Copyright 2010-2019 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
* This Font Software is licensed under the SIL Open Font License, Version 1.1.

m1n1 embeds portions of the [dwc3 usb linux driver](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/usb/dwc3/core.h?id=7bc5a6ba369217e0137833f5955cf0b0f08b0712), which was [BSD-or-GPLv2 dual-licensed](3rdparty_licenses/LICENSE.BSD-3.dwc3) and copyright
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com