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doc: Link coding guidelines to user guide

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Adds a link from user-guide.rst to coding-guidelines.rst and merges
the information about using checkpatch from both files into the user
guide document.

Change-Id: Iffbb4225836a042d20024faf28b8bdd6b2c4043e
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
This commit is contained in:
Paul Beesley 2019-01-21 12:06:24 +00:00
parent 5bfca3d329
commit 93fbc7142e
2 changed files with 44 additions and 44 deletions
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18
docs/coding-guidelines.rst
View file

@ -15,20 +15,8 @@ Some of the guidelines may also apply to other codebases.
**Note:** the existing TF codebase does not necessarily comply with all the
below guidelines but the intent is for it to do so eventually.
Coding style
------------
Trusted Firmware re-uses the `Linux Coding Style`_ . This style is enforced by
the *checkpatch* tool which can be found in the Linux source code (in `Linus's tree`_
, for example).
For convenience, the top-level TF makefile has a `checkpatch` target, which
defines a set of checkpatch options used in TF.
Checkpatch errors will gate upstream merging of pull requests.
Checkpatch warnings will not gate merging but should be reviewed and fixed if
possible.
Checkpatch overrides
--------------------
Some checkpatch warnings in the TF codebase are deliberately ignored. These
include:
@ -503,8 +491,6 @@ writeable data section, which may result in a smaller and faster binary. Note
that this may require dependent functions (``init()`` in the above example) to
have ``const`` arguments, assuming they don't need to modify the data.
.. _`Linux Coding Style`: https://www.kernel.org/doc/html/latest/process/coding-style.html
.. _`Linus's tree`: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/scripts/checkpatch.pl
.. _`Why the “volatile” type class should not be used`: https://www.kernel.org/doc/html/latest/process/volatile-considered-harmful.html
.. _`Procedure Call Standard for the Arm Architecture`: http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042f/IHI0042F_aapcs.pdf
.. _`Procedure Call Standard for the Arm 64-bit Architecture`: http://infocenter.arm.com/help/topic/com.arm.doc.ihi0055b/IHI0055B_aapcs64.pdf

70
docs/user-guide.rst
View file

@ -86,6 +86,46 @@ Download the TF-A source code from Github:
git clone https://github.com/ARM-software/arm-trusted-firmware.git
Checking source code style
~~~~~~~~~~~~~~~~~~~~~~~~~~
Trusted Firmware follows the `Linux Coding Style`_ . When making changes to the
source, for submission to the project, the source must be in compliance with
this style guide.
Additional, project-specific guidelines are defined in the `Trusted Firmware-A
Coding Guidelines`_ document.
To assist with coding style compliance, the project Makefile contains two
targets which both utilise the `checkpatch.pl` script that ships with the Linux
source tree. The project also defines certain *checkpatch* options in the
``.checkpatch.conf`` file in the top-level directory.
**Note:** Checkpatch errors will gate upstream merging of pull requests.
Checkpatch warnings will not gate merging but should be reviewed and fixed if
possible.
To check the entire source tree, you must first download copies of
``checkpatch.pl``, ``spelling.txt`` and ``const_structs.checkpatch`` available
in the `Linux master tree`_ *scripts* directory, then set the ``CHECKPATCH``
environment variable to point to ``checkpatch.pl`` (with the other 2 files in
the same directory) and build the `checkcodebase` target:
::
make CHECKPATCH=<path-to-linux>/linux/scripts/checkpatch.pl checkcodebase
To just check the style on the files that differ between your local branch and
the remote master, use:
::
make CHECKPATCH=<path-to-linux>/linux/scripts/checkpatch.pl checkpatch
If you wish to check your patch against something other than the remote master,
set the ``BASE_COMMIT`` variable to your desired branch. By default, ``BASE_COMMIT``
is set to ``origin/master``.
Building TF-A
-------------
@ -930,34 +970,6 @@ An additional boot loader binary file is created in the ``build`` directory:
build/<platform>/<build-type>/bl32.bin
Checking source code style
~~~~~~~~~~~~~~~~~~~~~~~~~~
When making changes to the source for submission to the project, the source
must be in compliance with the Linux style guide, and to assist with this check
the project Makefile contains two targets, which both utilise the
``checkpatch.pl`` script that ships with the Linux source tree.
To check the entire source tree, you must first download copies of
``checkpatch.pl``, ``spelling.txt`` and ``const_structs.checkpatch`` available
in the `Linux master tree`_ scripts directory, then set the ``CHECKPATCH``
environment variable to point to ``checkpatch.pl`` (with the other 2 files in
the same directory) and build the target checkcodebase:
::
make CHECKPATCH=<path-to-linux>/linux/scripts/checkpatch.pl checkcodebase
To just check the style on the files that differ between your local branch and
the remote master, use:
::
make CHECKPATCH=<path-to-linux>/linux/scripts/checkpatch.pl checkpatch
If you wish to check your patch against something other than the remote master,
set the ``BASE_COMMIT`` variable to your desired branch. By default, ``BASE_COMMIT``
is set to ``origin/master``.
Building and using the FIP tool
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@ -2054,6 +2066,7 @@ wakeup interrupt from RTC.
.. _Instructions for using Linaro's deliverables on Juno: https://community.arm.com/dev-platforms/w/docs/303/juno
.. _Arm Platforms Portal: https://community.arm.com/dev-platforms/
.. _Development Studio 5 (DS-5): http://www.arm.com/products/tools/software-tools/ds-5/index.php
.. _`Linux Coding Style`: https://www.kernel.org/doc/html/latest/process/coding-style.html
.. _Linux master tree: https://github.com/torvalds/linux/tree/master/
.. _Dia: https://wiki.gnome.org/Apps/Dia/Download
.. _here: psci-lib-integration-guide.rst
@ -2069,3 +2082,4 @@ wakeup interrupt from RTC.
.. _Juno Getting Started Guide: http://infocenter.arm.com/help/topic/com.arm.doc.dui0928e/DUI0928E_juno_arm_development_platform_gsg.pdf
.. _PSCI: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf
.. _Secure Partition Manager Design guide: secure-partition-manager-design.rst
.. _`Trusted Firmware-A Coding Guidelines`: coding-guidelines.rst