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Documentation: ACPI: move linuxized-acpica.txt to driver-api/acpi and convert to reST 

This converts the plain text documentation to reStructuredText format
and adds it to Sphinx TOC tree.

No essential content change.

Signed-off-by: Changbin Du <changbin.du@gmail.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.2
Changbin Du 2019-04-25 01:52:47 +08:00 committed by Rafael J. Wysocki
parent 1cf70ae6f0
commit 25710e23cd
2 changed files with 65 additions and 47 deletions
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1
Documentation/driver-api/acpi/index.rst
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@ -5,3 +5,4 @@ ACPI Support
.. toctree::
:maxdepth: 2
linuxized-acpica

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Documentation/acpi/linuxized-acpica.txt → Documentation/driver-api/acpi/linuxized-acpica.rst
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@ -1,31 +1,37 @@
.. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
============================================================
Linuxized ACPICA - Introduction to ACPICA Release Automation
============================================================
Copyright (C) 2013-2016, Intel Corporation
Author: Lv Zheng <lv.zheng@intel.com>
:Copyright: |copy| 2013-2016, Intel Corporation
:Author: Lv Zheng <lv.zheng@intel.com>
Abstract:
Abstract
========
This document describes the ACPICA project and the relationship between
ACPICA and Linux. It also describes how ACPICA code in drivers/acpi/acpica,
include/acpi and tools/power/acpi is automatically updated to follow the
upstream.
ACPICA Project
==============
1. ACPICA Project
The ACPI Component Architecture (ACPICA) project provides an operating
system (OS)-independent reference implementation of the Advanced
Configuration and Power Interface Specification (ACPI). It has been
adapted by various host OSes. By directly integrating ACPICA, Linux can
also benefit from the application experiences of ACPICA from other host
OSes.
The ACPI Component Architecture (ACPICA) project provides an operating
system (OS)-independent reference implementation of the Advanced
Configuration and Power Interface Specification (ACPI). It has been
adapted by various host OSes. By directly integrating ACPICA, Linux can
also benefit from the application experiences of ACPICA from other host
OSes.
The homepage of ACPICA project is: www.acpica.org, it is maintained and
supported by Intel Corporation.
The homepage of ACPICA project is: www.acpica.org, it is maintained and
supported by Intel Corporation.
The following figure depicts the Linux ACPI subsystem where the ACPICA
adaptation is included:
The following figure depicts the Linux ACPI subsystem where the ACPICA
adaptation is included::
+---------------------------------------------------------+
| |
@ -71,21 +77,27 @@ upstream.
Figure 1. Linux ACPI Software Components
NOTE:
.. note::
A. OS Service Layer - Provided by Linux to offer OS dependent
implementation of the predefined ACPICA interfaces (acpi_os_*).
::
include/acpi/acpiosxf.h
drivers/acpi/osl.c
include/acpi/platform
include/asm/acenv.h
B. ACPICA Functionality - Released from ACPICA code base to offer
OS independent implementation of the ACPICA interfaces (acpi_*).
::
drivers/acpi/acpica
include/acpi/ac*.h
tools/power/acpi
C. Linux/ACPI Functionality - Providing Linux specific ACPI
functionality to the other Linux kernel subsystems and user space
programs.
::
drivers/acpi
include/linux/acpi.h
include/linux/acpi*.h
@ -95,24 +107,27 @@ upstream.
ACPI subsystem to offer architecture specific implementation of the
ACPI interfaces. They are Linux specific components and are out of
the scope of this document.
::
include/asm/acpi.h
include/asm/acpi*.h
arch/*/acpi
2. ACPICA Release
ACPICA Release
==============
The ACPICA project maintains its code base at the following repository URL:
https://github.com/acpica/acpica.git. As a rule, a release is made every
month.
The ACPICA project maintains its code base at the following repository URL:
https://github.com/acpica/acpica.git. As a rule, a release is made every
month.
As the coding style adopted by the ACPICA project is not acceptable by
Linux, there is a release process to convert the ACPICA git commits into
Linux patches. The patches generated by this process are referred to as
"linuxized ACPICA patches". The release process is carried out on a local
copy the ACPICA git repository. Each commit in the monthly release is
converted into a linuxized ACPICA patch. Together, they form the monthly
ACPICA release patchset for the Linux ACPI community. This process is
illustrated in the following figure:
As the coding style adopted by the ACPICA project is not acceptable by
Linux, there is a release process to convert the ACPICA git commits into
Linux patches. The patches generated by this process are referred to as
"linuxized ACPICA patches". The release process is carried out on a local
copy the ACPICA git repository. Each commit in the monthly release is
converted into a linuxized ACPICA patch. Together, they form the monthly
ACPICA release patchset for the Linux ACPI community. This process is
illustrated in the following figure::
+-----------------------------+
| acpica / master (-) commits |
@ -153,7 +168,7 @@ upstream.
Figure 2. ACPICA -> Linux Upstream Process
NOTE:
.. note::
A. Linuxize Utilities - Provided by the ACPICA repository, including a
utility located in source/tools/acpisrc folder and a number of
scripts located in generate/linux folder.
@ -170,19 +185,20 @@ upstream.
following kernel configuration options:
CONFIG_ACPI/CONFIG_ACPI_DEBUG/CONFIG_ACPI_DEBUGGER
3. ACPICA Divergences
ACPICA Divergences
==================
Ideally, all of the ACPICA commits should be converted into Linux patches
automatically without manual modifications, the "linux / master" tree should
contain the ACPICA code that exactly corresponds to the ACPICA code
contained in "new linuxized acpica" tree and it should be possible to run
the release process fully automatically.
Ideally, all of the ACPICA commits should be converted into Linux patches
automatically without manual modifications, the "linux / master" tree should
contain the ACPICA code that exactly corresponds to the ACPICA code
contained in "new linuxized acpica" tree and it should be possible to run
the release process fully automatically.
As a matter of fact, however, there are source code differences between
the ACPICA code in Linux and the upstream ACPICA code, referred to as
"ACPICA Divergences".
As a matter of fact, however, there are source code differences between
the ACPICA code in Linux and the upstream ACPICA code, referred to as
"ACPICA Divergences".
The various sources of ACPICA divergences include:
The various sources of ACPICA divergences include:
1. Legacy divergences - Before the current ACPICA release process was
established, there already had been divergences between Linux and
ACPICA. Over the past several years those divergences have been greatly
@ -213,11 +229,12 @@ upstream.
rebased on the ACPICA side in order to offer better solutions, new ACPICA
divergences are generated.
4. ACPICA Development
ACPICA Development
==================
This paragraph guides Linux developers to use the ACPICA upstream release
utilities to obtain Linux patches corresponding to upstream ACPICA commits
before they become available from the ACPICA release process.
This paragraph guides Linux developers to use the ACPICA upstream release
utilities to obtain Linux patches corresponding to upstream ACPICA commits
before they become available from the ACPICA release process.
1. Cherry-pick an ACPICA commit
@ -225,7 +242,7 @@ upstream.
you want to cherry pick must be committed into the local repository.
Then the gen-patch.sh command can help to cherry-pick an ACPICA commit
from the ACPICA local repository:
from the ACPICA local repository::
$ git clone https://github.com/acpica/acpica
$ cd acpica
@ -240,7 +257,7 @@ upstream.
changes that haven't been applied to Linux yet.
You can generate the ACPICA release series yourself and rebase your code on
top of the generated ACPICA release patches:
top of the generated ACPICA release patches::
$ git clone https://github.com/acpica/acpica
$ cd acpica
@ -254,7 +271,7 @@ upstream.
3. Inspect the current divergences
If you have local copies of both Linux and upstream ACPICA, you can generate
a diff file indicating the state of the current divergences:
a diff file indicating the state of the current divergences::
# git clone https://github.com/acpica/acpica
# git clone http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git