374 lines
15 KiB
ReStructuredText
374 lines
15 KiB
ReStructuredText
.. -*- Mode: rst -*-
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.. include:: ../etc/definitions.rst
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.. URLs that changes between the various backends.
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.. _Coriolis Tools Documentation: file:///usr/share/doc/coriolis2/index.html
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.. |CoriolisSoftSchema| image:: ./images/Coriolis-Soft-Schema.png
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:alt: Coriolis Software Schematic
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:align: middle
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:width: 60%
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|newpage|
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Coriolis Configuration & Initialisation
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=======================================
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General Software Architecture
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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|Coriolis| has been built with respect of the classical paradigm that the
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computational instensive parts have been written in C++, and almost
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everything else in |Python|. To build the |Python| interface we used
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two methods:
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* For self-contained modules :cb:`boost::python` (mainly in :cb:`vlsisapd`).
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* For all modules based on |Hurricane|, we created our own wrappers due
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to very specific requirements such as shared functions between modules
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or C++/|Python| secure bi-directional object deletion.
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.. note:: **Python Documentation:**
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Most of the documentation is related to the C++ API and implemetation of
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the tools. However, the |Python| bindings have been created so they
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mimic *as closely as possible* the C++ interface, so the documentation
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applies to both languages with only minor syntactic changes.
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|bcenter| |CoriolisSoftSchema| |ecenter|
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All configuration & initialization files are Python scripts, despite their
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|dot_conf| extention. From a syntactic point of view, there is no difference
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between the system-wide configuration files and the user's configuration,
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they use the same Python helpers.
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|medskip|
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Configuration is done in two stages:
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#. Selecting the technology.
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#. Loading the complete configuration for the given technology
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and the user's settings.
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|newpage|
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First Stage: Technology Selection
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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|noindent|
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The initialization process is done by executing, in order, the following file(s):
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+-------+----------------------------------+----------------------------------------------+
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| Order | Meaning | File |
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+=======+==================================+==============================================+
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| **1** | The system setting | :cb:`/etc/coriolis2/techno.conf` |
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+-------+----------------------------------+----------------------------------------------+
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| **2** | The user's global setting | :cb:`${HOME}/.coriolis2/techno.py` |
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+-------+----------------------------------+----------------------------------------------+
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| **3** | The user's local setting | :cb:`<CWD>/.coriolis2/techno.py` |
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+-------+----------------------------------+----------------------------------------------+
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Those files must provide only one variable, the name of the technology. Each technology
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will provide configuration for both the symbolic part and the real part. |Coriolis| can
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work with purely symbolic technology (``symbolic/cmos``) in that case, the real technology
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part is a dummy one.
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For example, to use |MOSIS| 180nm: ::
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# -*- Mode:Python -*-
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technology = '180/scn6m_deep_09'
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Second Stage: Technology Configuration Loading
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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|noindent|
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The :cb:`technology` variable is set by the first stage and it's the name of the
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technology. A directory of that name, with all the configuration files,
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must exist in the configuration directory (:cb:`/etc/coriolis2`).
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In addition to the technology-specific directories, a :cb:`common/` directory is
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there to provide a trunk for all the identical data across the various technologies.
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The initialization process is done by executing, in order, the following file(s):
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+-------+----------------------------------+-----------------------------------------------+
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| Order | Meaning | File |
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+=======+==================================+===============================================+
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| **1** | The system initialization | :cb:`/etc/coriolis2/<technology>/<TOOL>.conf` |
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+-------+----------------------------------+-----------------------------------------------+
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| **2** | The user's global initialization | :cb:`${HOME}/.coriolis2/settings.py` |
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+-------+----------------------------------+-----------------------------------------------+
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| **3** | The user's local initialization | :cb:`<CWD>/.coriolis2/settings.py` |
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+-------+----------------------------------+-----------------------------------------------+
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.. note:: *The loading policy is not hard-coded.* It is implemented
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at Python level in :cb:`/etc/coriolis2/coriolisInit.py`, and thus may be easily
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amended to whatever site policy.
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The truly mandatory requirement is the existence of :cb:`coriolisInit.py`
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which *must* contain a :cb:`coriolisConfigure()` function with no argument.
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The :cb:`coriolisInit.py` script execution is triggered by the *import* of
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the ``CRL`` module:
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.. code:: python
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import sys
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import os.path
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import Cfg
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import Hurricane
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import CRL # Triggers execution of "coriolisInit.py".
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import Viewer
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Configuration Helpers
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~~~~~~~~~~~~~~~~~~~~~
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To ease the writing of configuration files, a set of small helpers
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is available. They allow to setup the configuration parameters through
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simple assembly of tuples. The helpers are installed under the directory: ::
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<install>/etc/coriolis2/
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Where :cb:`<install>/` is the root of the installation.
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|newpage|
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.. _Alliance Helper:
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|Alliance| Helper
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-----------------
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The configuration file must provide an :cb:`allianceConfig` tuple as shown below.
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Like all the |Coriolis| configuration file, it is to be executed through |Python|,
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so we can use it to perform a not so dumb search of the |Alliance| installation
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directory. Our default policy is to try to read the ``ALLIANCE_TOP`` environment
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variable, and if not found, default to ``/soc/alliance``.
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.. code:: python
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import os
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from helpers.Alliance import AddMode
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from helpers.Alliance import Gauge
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allianceTop = None
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if os.environ.has_key('ALLIANCE_TOP'):
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allianceTop = os.environ['ALLIANCE_TOP']
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if not os.path.isdir(allianceTop):
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allianceTop = None
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if not allianceTop: allianceTop = '/soc/alliance'
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cellsTop = allianceTop+'/cells/'
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allianceConfig = \
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( ( 'CATALOG' , 'CATAL')
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, ( 'WORKING_LIBRARY' , '.')
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, ( 'SYSTEM_LIBRARY' , ( (cellsTop+'sxlib' , AddMode.Append)
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, (cellsTop+'dp_sxlib', AddMode.Append)
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, (cellsTop+'ramlib' , AddMode.Append)
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, (cellsTop+'romlib' , AddMode.Append)
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, (cellsTop+'rflib' , AddMode.Append)
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, (cellsTop+'rf2lib' , AddMode.Append)
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, (cellsTop+'pxlib' , AddMode.Append)
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, (cellsTop+'padlib' , AddMode.Append) ) )
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, ( 'IN_LO' , 'vst')
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, ( 'IN_PH' , 'ap')
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, ( 'OUT_LO' , 'vst')
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, ( 'OUT_PH' , 'ap')
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, ( 'POWER' , 'vdd')
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, ( 'GROUND' , 'vss')
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, ( 'CLOCK' , '.*ck.*|.*nck.*')
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, ( 'BLOCKAGE' , '^blockage[Nn]et*')
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, ( 'PAD' , '.*_px$')
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)
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|noindent| The example above shows the system configuration file, with all the
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available settings. Some important remarks about those settings:
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* In its configuration file, the user does not need to redefine all the settings,
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just the one he wants to change. In most of the cases, the ``SYSTEM_LIBRARY``,
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the ``WORKING_LIBRARY`` and the special net names (at this point there is not
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much alternatives for the others settings).
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* ``SYSTEM_LIBRARY`` setting: Setting up the library search path.
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Each library entry in the tuple will be added to the search path according
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to the second parameter:
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* :cb:`AddMode::Append`: append to the search path.
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* :cb:`AddMode::Prepend`: insert in head of the search path.
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* :cb:`AddMode::Replace`: look for a library of the same name and replace
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it, whithout changing the search path order. If no library of that name
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already exists, it is appended.
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A library is identified by its name, this name is the last component of the
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path name. For instance: ``/soc/alliance/sxlib`` will be named ``sxlib``.
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Implementing the |Alliance| specification, when looking for a |Cell| ``name``,
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the system will browse sequentially through the library list and returns
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the first |Cell| whose name match.
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* For ``POWER``, ``GROUND``, ``CLOCK`` and ``BLOCKAGE`` net names, a regular
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expression (|GNU| regexp) is expected.
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.. * The ``helpers.sysConfDir`` variable is supplied by the helpers, it is the
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.. directory in which the system-wide configuration files are located.
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.. For a standard installation it would be: ``/soc/coriolis2``.
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..
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.. .. * Trick and naming convention about ``SYMBOLIC_TECHNOLOGY``, ``REAL_TECHNOLOGY``
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.. and ``DISPLAY``. In the previous releases, those files were to be read by
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.. XML parsers, and still do if you triggers the XML compatibility mode.
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.. But now, they have Python conterparts. In the configuration files, you
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.. still have to name them as XML files, the Python file name will be
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.. deduced from this one with those two translation rules:
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..
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.. #. In the filename, all dots, except for the last (the file extention),
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.. are replaced by underscores.
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..
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.. #. The ``.xml`` extention is substituted by a ``.conf``.
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..
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.. For the symbolic technology, it would give: ::
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..
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.. /soc/coriolis2/technology.symbolic.xml
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.. --> /soc/coriolis2/technology_symbolic.conf
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A typical user's configuration file would be: ::
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import os
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homeDir = os.getenv('HOME')
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allianceConfig = \
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( ('WORKING_LIBRARY' , homeDir+'/worklib')
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, ('SYSTEM_LIBRARY' , ( (homeDir+'/mylib', Environment.Append) ) )
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, ('POWER' , 'vdd.*')
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, ('GROUND' , 'vss.*')
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)
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Tools Configuration Helpers
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---------------------------
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All the tools use the same helper to load their configuration (a.k.a.
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*Configuration Helper*). Currently the following configuration system-wide
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configuration files are defined:
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* :cb:`misc.conf`: common settings or not belonging specifically to a tool.
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* :cb:`etesian.conf`: for the |Etesian| tool.
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* :cb:`kite.conf`: for the |Kite| tool.
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* :cb:`stratus1.conf`: for the |stratus1| tool.
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Here is the contents of :cb:`etesian.conf`: ::
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# Etesian parameters.
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parametersTable = \
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( ('etesian.aspectRatio' , TypePercentage, 100 , { 'min':10, 'max':1000 } )
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, ('etesian.spaceMargin' , TypePercentage, 5 )
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, ('etesian.uniformDensity' , TypeBool , False )
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, ('etesian.routingDriven' , TypeBool , False )
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, ("etesian.effort" , TypeEnumerate , 2
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, { 'values':( ("Fast" , 1)
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, ("Standard", 2)
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, ("High" , 3)
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, ("Extreme" , 4) ) }
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)
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, ("etesian.graphics" , TypeEnumerate , 2
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, { 'values':( ("Show every step" , 1)
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, ("Show lower bound" , 2)
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, ("Show result only" , 3) ) }
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)
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)
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layoutTable = \
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( (TypeTab , 'Etesian', 'etesian')
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, (TypeTitle , 'Placement area')
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, (TypeOption, "etesian.aspectRatio" , "Aspect Ratio, X/Y (%)", 0 )
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, (TypeOption, "etesian.spaceMargin" , "Space Margin" , 1 )
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, (TypeRule ,)
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, (TypeTitle , 'Etesian - Placer')
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, (TypeOption, "etesian.uniformDensity", "Uniform density" , 0 )
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, (TypeOption, "etesian.routingDriven" , "Routing driven" , 0 )
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, (TypeOption, "etesian.effort" , "Placement effort" , 1 )
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, (TypeOption, "etesian.graphics" , "Placement view" , 1 )
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, (TypeRule ,)
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)
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|newpage|
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Taxonomy of the file:
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* It must contain, at least, the two tables:
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* ``parametersTable``, defines & initialises the configuration variables.
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* ``layoutTables``, defines how the various parameters will be displayed
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in the configuration window (:ref:`The Settings Tab`).
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* The ``parametersTable``, is a tuple (list) of tuples. Each entry in the list
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describes a configuration parameter. In its simplest form, it's a quadruplet
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:cb:`(TypeOption, 'paramId', ParameterType, DefaultValue)` with:
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#. ``TypeOption``, tells that this tuple describes a parameter.
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#. ``paramId``, the identifier of the parameter. Identifiers are defined
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by the tools. The list of parameters is detailed in each tool section.
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#. ``ParameterType``, the kind of parameter. Could be:
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* ``TypeBool``, boolean.
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* ``TypeInt``, signed integer.
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* ``TypeEnumerate``, enumerated type, needs extra entry.
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* ``TypePercentage``, percentage, expressed between 0 and 100.
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* ``TypeDouble``, float.
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* ``TypeString``, character string.
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#. ``DefaultValue``, the default value for that parameter.
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Hacking the Configuration Files
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Aside from the symbols that get used by the configuration helpers like
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:cb:`allianceConfig` or :cb:`parametersTable`, you can put pretty much anything
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in :cb:`<CWD>/.coriolis2/settings.py` (that is, written in |Python|).
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For example: ::
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# -*- Mode:Python -*-
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defaultStyle = 'Alliance.Classic [black]'
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# Regular Coriolis configuration.
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parametersTable = \
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( ('misc.catchCore' , TypeBool , False )
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, ('misc.info' , TypeBool , False )
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, ('misc.paranoid' , TypeBool , False )
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, ('misc.bug' , TypeBool , False )
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, ('misc.logMode' , TypeBool , True )
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, ('misc.verboseLevel1' , TypeBool , False )
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, ('misc.verboseLevel2' , TypeBool , True )
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, ('misc.minTraceLevel' , TypeInt , 0 )
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, ('misc.maxTraceLevel' , TypeInt , 0 )
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)
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# Some ordinary Python script...
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import os
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print ' o Cleaning up ClockTree previous run.'
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for fileName in os.listdir('.'):
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if fileName.endswith('.ap') or (fileName.find('_clocked.') >= 0):
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print ' - <%s>' % fileName
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os.unlink(fileName)
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See :ref:`Python Interface to Coriolis` for more details those capabilities.
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