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# ArmVirtPkg - Platform CI
This Readme.md describes the Azure DevOps based Platform CI for ArmVirtPkg and how
to use the same Pytools based build infrastructure locally.
## Supported Configuration Details
This solution for building and running ArmVirtPkg has only been validated with Ubuntu
18.04 and the GCC5 toolchain. Two different firmware builds are supported and are
described below.
| Configuration name | Architecture | DSC File |Additional Flags |
| :---------- | :----- | :----- | :---- |
| AARCH64 | AARCH64 | ArmVirtQemu.dsc | None |
| ARM | ARM | ArmVirtQemu.dsc | None |
## EDK2 Developer environment
- [Python 3.8.x - Download & Install](https://www.python.org/downloads/)
- [GIT - Download & Install](https://git-scm.com/download/)
- [QEMU - Download, Install, and add to your path](https://www.qemu.org/download/)
- [Edk2 Source](https://github.com/tianocore/edk2)
- Additional packages found necessary for Ubuntu 18.04
- apt-get install gcc g++ make uuid-dev
Note: edksetup, Submodule initialization and manual installation of NASM, iASL, or
the required cross-compiler toolchains are **not** required, this is handled by the
Pytools build system.
## Building with Pytools for ArmVirtPkg
1. [Optional] Create a Python Virtual Environment - generally once per workspace
``` bash
python -m venv <name of virtual environment>
```
2. [Optional] Activate Virtual Environment - each time new shell opened
- Windows
``` bash
<name of virtual environment>/Scripts/activate.bat
```
- Linux
```bash
source <name of virtual environment>/bin/activate
```
3. Install Pytools - generally once per virtual env or whenever pip-requirements.txt changes
``` bash
pip install --upgrade -r pip-requirements.txt
```
4. Initialize & Update Submodules - only when submodules updated
``` bash
stuart_setup -c ArmVirtPkg/PlatformCI/PlatformBuild.py TOOL_CHAIN_TAG=<TOOL_CHAIN_TAG> -a <TARGET_ARCH>
```
5. Initialize & Update Dependencies - only as needed when ext_deps change
``` bash
stuart_update -c ArmVirtPkg/PlatformCI/PlatformBuild.py TOOL_CHAIN_TAG=<TOOL_CHAIN_TAG> -a <TARGET_ARCH>
```
6. Compile the basetools if necessary - only when basetools C source files change
``` bash
python BaseTools/Edk2ToolsBuild.py -t <ToolChainTag>
```
7. Compile Firmware
``` bash
stuart_build -c ArmVirtPkg/PlatformCI/PlatformBuild.py TOOL_CHAIN_TAG=<TOOL_CHAIN_TAG> -a <TARGET_ARCH>
```
- use `stuart_build -c ArmVirtPkg/PlatformCI/PlatformBuild.py -h` option to see additional
options like `--clean`
8. Running Emulator
- You can add `--FlashRom` to the end of your build command and the emulator will run after the
build is complete.
- or use the `--FlashOnly` feature to just run the emulator.
``` bash
stuart_build -c ArmVirtPkg/PlatformCI/PlatformBuild.py TOOL_CHAIN_TAG=<TOOL_CHAIN_TAG> -a <TARGET_ARCH> --FlashOnly
```
### Notes
1. Including the expected build architecture and toolchain to the _stuart_update_ command is critical.
This is because there are extra scopes and tools that will be resolved during the update step that
need to match your build step.
2. Configuring *ACTIVE_PLATFORM* and *TARGET_ARCH* in Conf/target.txt is **not** required. This
environment is set by PlatformBuild.py based upon the `[-a <TARGET_ARCH>]` parameter.
3. QEMU must be on your path. On Windows this is a manual process and not part of the QEMU installer.
**NOTE:** Logging the execution output will be in the normal stuart log as well as to your console.
### Custom Build Options
**MAKE_STARTUP_NSH=TRUE** will output a *startup.nsh* file to the location mapped as fs0. This is
used in CI in combination with the `--FlashOnly` feature to run QEMU to the UEFI shell and then execute
the contents of *startup.nsh*.
**QEMU_HEADLESS=TRUE** Since CI servers run headless QEMU must be told to run with no display otherwise
an error occurs. Locally you don't need to set this.
### Passing Build Defines
To pass build defines through _stuart_build_, prepend `BLD_*_`to the define name and pass it on the
command-line. _stuart_build_ currently requires values to be assigned, so add an`=1` suffix for bare defines.
For example, to enable the TPM2 support, instead of the traditional "-D TPM2_ENABLE=TRUE", the stuart_build
command-line would be:
`stuart_build -c ArmVirtPkg/PlatformCI/PlatformBuild.py BLD_*_TPM2_ENABLE=TRUE`
## References
- [Installing and using Pytools](https://github.com/tianocore/edk2-pytool-extensions/blob/master/docs/using.md#installing)
- More on [python virtual environments](https://docs.python.org/3/library/venv.html)
|
