OpenIPCore Hardware General Public License “OHGPL”*
*Draft Version 0.20-15092000 September 2000*
Copyright (C) 2000 OpenIPCore Organization.
Everyone is permitted to copy and distribute and modify this document
under the terms of the GNU Free Documentation License.
The preamble is part of the license and the license and its preamble can
not be split out.
*SYSTEM: * Is any thing that works or supposed to work to do some
operations depending on some specific inputs and produce some results.
*HARDWARE DESIGN:* (The terms HARDWARE DESIGN and DESIGN can be used
interchangeably in the license)
Is any work that defines, describes or simulates a system or part of a
system that could be physically implemented. This includes but not
limited to, system architectures, design ideas, design description,
micro-codes or hardware instructions.
*HARDWARE DESIGN DESCRIPTION:* (The terms HARDWARE DESIGN DESCRIPTION
and DESIGN DESCRIPTION can be used interchangeably in the license)
Is any form of documentation or supporting materials that defines and
identifies the Hardware design, how it can be implemented and/or tested.
This includes but not limited to, HDL codes, schematics, net-lists, PCB
layouts, chip and silicon cell layout, timing diagrams, truth tables,
flow charts, state diagrams, block diagrams or written (digitally or
*Hardware design files/ CAD files:* Are set of files that are used to
describe the hardware design, its implementation or testing or some
parts of it.
*Fabrication files:* Are set of files that are used to physically
implement the design or part of it.
*COPYING A HARDWARE DESIGN DESCRIPTION: * Is the act of duplicating the
design description or CAD files in anyway.
*DISTRIBUTION OF A HARDWARE DESIGN:* Is the act of publishing and making
the design description available for more activities or people.
*MODIFICATION OF A DESIGN:* Is the act of reproducing the design in
order to alter (not necessarily to succeed to improve) the design itself
or the description of the design.
*IMPLEMENTATION OF A DESIGN:* Is the act of producing/reproducing the
hardware design or part of it to get the physical or part of the
*The Derivative work* means any changes, improvements or porting the
original work to other environments or platforms (e.g. different
hardware target, different PLD….). This may vary depending on the type
of the hardware design itself.
*The based work* is the act of using the design AS IS without any
modification as a building block or module of other design. (e.g. like
using the design as a daughter board for a large system, or using the
HDL code in SoC core).
OpenIPCore/OpenCores License terms.
*TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION *
1. This license applies to hardware designs, hardware design
description, CAD or Fabrication files or any other work which contains a
notice placed by the copyright holder saying it may be distributed under
the terms of this License.
2. You may copy, distribute and/or implement this Hardware Design or any
portion of it as is. Any time you copy or distribute this design you
have to provide all of the source files and documentations that came
with the original work or put them in a public place that anyone can
reach without any kind of restrictions.
3. You can not sell the design description, design files or fabrication
files but you may charge fee for the physical act of transferring a copy
4. You can implement the design and charge fees for the physical
hardware and you have to provide notice for the public about the source
of the design description.
5. Any modification of this hardware design or any derivative work from
it should be documented by providing list of changes, reasons behind the
changes and the date of change.
6. You are allowed to use the design or design files on any work based
on the hardware design.
7. You may not copy, modify, sublicense, or distribute the design/design
description or files except as expressly provided under this License.
Any attempt otherwise to copy, modify, sublicense or distribute the
design/design description or files is void, and will automatically
terminate your rights under this License. However, parties who have
received copies, or rights, from you under this License will not have
their licenses terminated so long as such parties remain in full
8. Each time you redistribute the design description or files, the
recipient automatically receives a license from the original licensor to
copy, distribute or modify the Program subject to these terms and
conditions. You may not impose any further restrictions on the
recipients’ exercise of the rights granted herein.
9. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the hardware design or its derivative works. These actions
are prohibited by law if you do not accept this License. Therefore, by
modifying, distributing or implementing the hardware design (or any work
based on the hardware design), you indicate your acceptance of this
License to do so, and all its terms and conditions for copying,
distributing or modifying the hardware design or works based on it.
10. NO WARRANTY of any kind is provided on the functionality,
performance or risks cased by using this Hardware Design.
11.a. BECAUSE THE HARDWARE DESIGN IS LICENSED FREE OF CHARGE, THERE IS
NO WARRANTY FOR IT, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT
WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER
PARTIES PROVIDE THE HARDWARE DESIGN IMPLEMENTATION “AS IS” WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF
THE HARDWARE DESIGN IS WITH YOU. SHOULD THE DESIGN PROVE DEFECTIVE, YOU
ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
11.b. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
AND/OR REDISTRIBUTE THE HARDWARE DESIGN AS PERMITTED ABOVE, BE LIABLE TO
YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
HARDWARE DESIGN (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR ANY
OTHER KIND OF LOSSES OR A FAILURE OF THE HARDWARE DESIGN IMPLEMENTATION
TO OPERATE WITH ANY OTHER SYSTEMS), EVEN IF SUCH HOLDER OR OTHER PARTY
HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
11.c IN CASE OF THE PHYSICAL IMPLEMINTATION, THE IMPLIMENTER CAN PROVIDE
WARRANTIES ON THE PHYSICAL HARDWARE AND CHARGE FOR FEES FOR SUCH
A. How to Apply These Terms to Your New Hardware designs:
1. you can include this license with your design description and design
and fabrication files 2. You can place a notice in the files about the
use of this license.
B. Notes and Remarks:
1. This license is based on copyright so there is no restriction on the
implementation of the hardware design. 2. You can provide a notice about
the design source on the manual, on the web, on the physical device or
on any form.
1. Created on 8 October 1999 by Jamil Khatib.
2. Revision 0.16 on 12 October 1999 by Jamil Khaitb
– – Revised by several related mailing lists.
– – Preamble was added with set of definitions
– – Name was changed to OpenIP Hardware General Public License “OHGPL”
3. Revision 0.16 on 15 October 1999 by Jamil Khatib
– – Updated the license with the comments mentioned in the mailing list
upto 14 October, 1999.
4. Revision 0.17 on 26 October 1999 by Jamil Khatib
– – Updated item 5 so that the designs description can be sold.
5. Revision 0.2 on 15 September 2000 by Jamil Khatib
– – Major rewrite to the license to cover up to date issues.
– – Item 6 is used to provide the compatibility with the LGPL.