[rtems-docs commit] develenv/directory.rst: Update directory structure description
Joel Sherrill
joel at rtems.org
Thu Dec 12 23:04:08 UTC 2019
Module: rtems-docs
Branch: master
Commit: 2e3dc9fa5fa505a1850778d1ba1b5a2b128b373a
Changeset: http://git.rtems.org/rtems-docs/commit/?id=2e3dc9fa5fa505a1850778d1ba1b5a2b128b373a
Author: Joel Sherrill <joel at rtems.org>
Date: Thu Dec 12 17:03:28 2019 -0600
develenv/directory.rst: Update directory structure description
closes #3796.
---
develenv/directory.rst | 189 ++++++++++---------------------------------------
1 file changed, 38 insertions(+), 151 deletions(-)
diff --git a/develenv/directory.rst b/develenv/directory.rst
index 9ddc72c..0d7b36f 100644
--- a/develenv/directory.rst
+++ b/develenv/directory.rst
@@ -52,28 +52,15 @@ the RTEMS source tree. The top of the tree will be referenced as
rtems-VERSION
|
- +--------+----+----+----+--+-----+---+-------+--------+
- | | | | | | | | |
- aclocal automake c contrib cpukit doc make testsuites tools
-
-``${RTEMS_ROOT}/aclocal/``
- This directory contains the custom M4 macros which are available to the
- various GNU autoconf ``configure.ac`` scripts throughout the RTEMS source
- tree. GNU autoconf interprets ``configure.ac`` files to produce the
- ``configure`` files used to tailor RTEMS build for a particular host and
- target environment. The contents of this directory will not be discussed
- further in this document.
-
-``${RTEMS_ROOT}/automake/``
- This directory contains the custom GNU automake fragments which are used to
- support the various ``Makefile.am`` files throughout the RTEMS source tree.
- The contents of this directory will not be discussed further in this
- document.
+ +----+----+----+--+-----+---+-------+--------+
+ | | | | | | | |
+ c contrib cpukit doc make testsuites tools
``${RTEMS_ROOT}/c/``
- This directory is the root of the portions of the RTEMS source tree which
- must be built tailored for a particular CPU model or BSP. The contents of
- this directory will be discussed in the `c/ Directory`_ section.
+ Historically, this directory was the root of the portions of the
+ RTEMS source tree which must be built tailored for a particular CPU
+ model or BSP. In the current source, only the build support files for
+ the autoconf/automake based build system remain in this subdirectory.
``${RTEMS_ROOT}/cpukit/``
This directory is the root for all of the "multilib'able" portions of
@@ -83,137 +70,49 @@ the RTEMS source tree. The top of the tree will be referenced as
under this directory. The contents of this directory will be discussed in
the `CPU Kit Directory`_ section.
+``${RTEMS_ROOT}/bsps``
+ This directory is the root for all of the BSP specific source in
+ RTEMS. The contents of this directory are discussed in the `BSPs
+ Directory`_ section.
+
``${RTEMS_ROOT}/make/``
- This directory contains files which support the RTEMS Makefile's. From a
- user's perspective, the most important parts are found in the ``custom/``
- subdirectory. Each ".cfg" file in this directory is associated with a
- specific BSP and describes the CPU model, compiler flags, and procedure to
- produce an executable for the target board. These files are described in
- detail in the *RTEMS BSP and Driver Guide* and will not
- be discussed further in this document.
+ This directory contains files which support RTEMS Makefile's. From a
+ user's perspective, the most important part is the BSP specific
+ information found in the ``config`` subdirectory of each BSP.
+ Each ".cfg" file is associated with a specific BSP
+ and describes the CPU model, and compiler flags used to produce
+ an executable for the target board. These files are described in
+ detail in the *RTEMS BSP and Driver Guide* and will not be discussed
+ further in this document.
``${RTEMS_ROOT}/testsuites/``
This directory contains the test suites for the various RTEMS APIs and
support libraries. The contents of this directory are discussed in the
`testsuites/ Test Suites`_ section.
-``${RTEMS_ROOT}/tools/``
- This directory contains RTEMS specific support utilities which execute on
- the development host. These utilities are divided into subdirectories
- based upon whether they are used in the process of building RTEMS and
- applications, are CPU specific, or are used to assist in updating the RTEMS
- source tree and applications. The support utilities used in the process of
- building RTEMS are described in :ref:`rtems-specific-utilities`.
- These are the only components of this subtree that will be discussed
- in this document.
-
-c/ Directory
-============
-
-The ``${RTEMS_ROOT}/c/`` directory was formerly the root directory of all RTEMS
-source code. At this time, it contains the root directory for only those RTEMS
-components which must be compiled or linked in a way that is specific to a
-particular CPU model or board. This directory contains the following
-subdirectories:
-
-``${RTEMS_ROOT}/c/src/``
- This directory is logically the root for the RTEMS components which are CPU
- model or board dependent. Thus this directory is the root for the BSPs and
- the Ada Test Suites as well as CPU model and BSP dependent libraries. The
- contents of this directory are discussed in the `c/src/ Directory`_
- section.
-
-c/src/ Directory
-----------------
-
-As mentioned previously, this directory is logically the root for the RTEMS
-components which are CPU model or board dependent. The following is a list of
-the subdirectories in this directory and a description of each.
-
-``${RTEMS_ROOT}/c/src/aclocal/``
- This directory contains the custom M4 macros which are available to the
- various GNU autoconf ``configure.ac`` scripts throughout this portion of
- the RTEMS source tree. GNU autoconf interprets``configure.ac`` files to
- produce the ``configure`` files used to tailor RTEMS build for a particular
- host and target environment. The contents of this directory will not be
- discussed further in this document.
-
-``${RTEMS_ROOT}/c/src/ada/``
- This directory contains the Ada95 language bindings to the RTEMS Classic
- API.
-
-``${RTEMS_ROOT}/c/src/ada-tests/``
- This directory contains the test suite for the Ada language bindings to the
- Classic API.
-
-``${RTEMS_ROOT}/c/src/automake/``
- This directory contains files which are "Makefile fragments." They are
- included as required by the various ``Makefile.am`` files throughout this
- portion of the RTEMS source tree.
-
-``${RTEMS_ROOT}/c/src/lib/``
- This directory contains the directories ``libbsp/`` and ``libcpu/`` which
- contain the source code for the Board Support Packages (BSPs) and CPU Model
- specific source code for RTEMS. The ``libbsp/`` is organized based upon
- the CPU family and boards BSPs. The contents of ``libbsp/`` are discussed
- briefly in `c/src/lib/libbsp BSP Directory`_ and presented in detail in
- the *RTEMS BSP and Driver Guide*. The ``libcpu/``
- directory is also organized by CPU family with further divisions based upon
- CPU model and features that are shared across CPU models such as caching
- and DMA.
-
-``${RTEMS_ROOT}/c/src/libchip/``
- This directory contains device drivers for various peripheral chips which
- are designed to be CPU and board dependent. This directory contains a
- variety of drivers for serial devices, network interface controllers,
- shared memory and real-time clocks.
-
-``${RTEMS_ROOT}/c/src/librtems++/``
- This directory contains C++ classes which map to the RTEMS Classic API.
-
-``${RTEMS_ROOT}/c/src/make/``
- This directory is used to generate the bulk of the supporting rules files
- which are installed as part of the Application Makefiles. This file
- contains settings for various Makefile variables to tailor them to the
- particular CPU model and BSP configured.
-
-``${RTEMS_ROOT}/c/src/nfsclient/``
- This directory contains a Network File System (NFS) client for RTEMS. With
- this file system, a user's application can access files on a remote
- computer.
-
-``${RTEMS_ROOT}/c/src/support/``
- This directory exists solely to generate the RTEMS version string which
- includes the RTEMS version, CPU architecture, CPU model, and BSP name.
-
-``${RTEMS_ROOT}/c/src/wrapup/``
- This directory is responsible for taking the individual libraries and
- objects built in each of the components in the RTEMS source tree and
- bundling them together to form the single RTEMS library ``librtemsbsp.a``.
- This library contains all BSP and CPU model specific software.
-
-c/src/lib/libbsp BSP Directory
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+BSPs Directory
+~~~~~~~~~~~~~~
-The "libbsp" directory contains a directory for each CPU family supported by
+The "bsps" directory contains a directory for each CPU family supported by
RTEMS. Beneath each CPU directory is a directory for each BSP for that
processor family.
-The "libbsp" directory provides all the BSPs provided with this release of the
-RTEMS executive. The subdirectories are divided, as discussed previously,
+The "bsps" directory provides all the BSPs provided with this release
+of RTEMS. The subdirectories are divided, as discussed previously,
based on specific processor family, then further broken down into specific
-target board environments. The "no_cpu" subdirectory provides a starting point
-template BSP which can be used to develop a specific BSP for an unsupported
-target board. The files in this subdirectory may aid in preliminary testing of
-the RTEMS development environment that has been built for no particular target
-in mind.
+target board environments. The "no_cpu" subdirectory provides a starting
+point template BSP which can be used to develop a specific BSP for an
+unsupported target board. The files in this subdirectory may aid in
+preliminary testing of the RTEMS development environment that has been
+built for no particular target in mind.
Below each CPU dependent directory is a directory for each target BSP supported
in this release.
Each BSP provides the modules which comprise an RTEMS BSP. The modules are
-separated into the subdirectories "clock", "console", "include", "shmsupp",
-"startup", and "timer" as shown in the following figure:
+separated into various subdirectories such as "clock", "console",
+"include", "shmsupp", "startup", and "timer" as shown in the following
+figure:
.. code-block:: c
@@ -226,15 +125,16 @@ separated into the subdirectories "clock", "console", "include", "shmsupp",
CPU Kit Directory
=================
-The @code{cpukit/} directory structure is as follows:
+The @code{cpukit/} directory contains many subdirectories with the
+most important ones being shown in the structure below:
.. code-block:: c
cpukit
|
- +-----------+----------+-----------+----------+
- | | | | |
- posix rtems sapi score wrapup
+ +-----------+----------+-----------+
+ | | | |
+ posix rtems sapi score
The ``cpukit/`` directory contains a set of subdirectories which contains the
source files comprising the executive portion of the RTEMS development
@@ -244,19 +144,6 @@ directory) source code files are separated into distinct directory trees.
The following is a description of each of the subdirectories under ``cpukit/``:
-``${RTEMS_ROOT}/cpukit/aclocal/``
- This directory contains the custom M4 macros which are available to the
- various GNU autoconf ``configure.ac`` scripts throughout the CPU Kit
- portion of the RTEMS source tree. GNU autoconf interprets ``configure.ac``
- files to produce the ``configure`` files used to tailor RTEMS build for a
- particular host and target environment. The contents of this directory
- will not be discussed further in this document.
-
-``${RTEMS_ROOT}/cpukit/automake/``
- This directory contains files which are "Makefile fragments." They are
- included as required by the various ``Makefile.am`` files throughout the
- CPU Kit portion of the RTEMS source tree.
-
``${RTEMS_ROOT}/cpukit/ftpd/``
This directory contains the RTEMS ftpd server.
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