| U-Boot is Free Software. It is copyrighted by Wolfgang Denk and |
| many others who contributed code (see the actual source code and the |
| git commit messages for details). You can redistribute U-Boot and/or |
| modify it under the terms of version 2 of the GNU General Public |
| License as published by the Free Software Foundation. Most of it can |
| also be distributed, at your option, under any later version of the |
| GNU General Public License -- see individual files for exceptions. |
| |
| NOTE! This license does *not* cover the so-called "standalone" |
| applications that use U-Boot services by means of the jump table |
| provided by U-Boot exactly for this purpose - this is merely |
| considered normal use of U-Boot, and does *not* fall under the |
| heading of "derived work" -- see file Licenses/Exceptions for |
| details. |
| |
| Also note that the GPL and the other licenses are copyrighted by |
| the Free Software Foundation and other organizations, but the |
| instance of code that they refer to (the U-Boot source code) is |
| copyrighted by me and others who actually wrote it. |
| -- Wolfgang Denk |
| |
| |
| Like many other projects, U-Boot has a tradition of including big |
| blocks of License headers in all files. This not only blows up the |
| source code with mostly redundant information, but also makes it very |
| difficult to generate License Clearing Reports. An additional problem |
| is that even the same licenses are referred to by a number of |
| slightly varying text blocks (full, abbreviated, different |
| indentation, line wrapping and/or white space, with obsolete address |
| information, ...) which makes automatic processing a nightmare. |
| |
| To make this easier, such license headers in the source files will be |
| replaced with a single line reference to Unique License Identifiers |
| as defined by the Linux Foundation's SPDX project [1]. For example, |
| in a source file the full "GPL v2.0 or later" header text will be |
| replaced by a single line: |
| |
| SPDX-License-Identifier: GPL-2.0+ |
| |
| Ideally, the license terms of all files in the source tree should be |
| defined by such License Identifiers; in no case a file can contain |
| more than one such License Identifier list. |
| |
| If a "SPDX-License-Identifier:" line references more than one Unique |
| License Identifier, then this means that the respective file can be |
| used under the terms of either of these licenses, i. e. with |
| |
| SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause |
| |
| you can choose between GPL-2.0+ and BSD-3-Clause licensing. |
| |
| We use the SPDX Unique License Identifiers here; these are available |
| at [2]. |
| |
| [1] http://spdx.org/ |
| [2] http://spdx.org/licenses/ |
| |
| Full name SPDX Identifier OSI Approved File name URI |
| ======================================================================================================================================= |
| GNU General Public License v2.0 only GPL-2.0 Y gpl-2.0.txt http://www.gnu.org/licenses/gpl-2.0.txt |
| GNU General Public License v2.0 or later GPL-2.0+ Y gpl-2.0.txt http://www.gnu.org/licenses/gpl-2.0.txt |
| GNU Library General Public License v2 or later LGPL-2.0+ Y lgpl-2.0.txt http://www.gnu.org/licenses/old-licenses/lgpl-2.0.txt |
| GNU Lesser General Public License v2.1 or later LGPL-2.1+ Y lgpl-2.1.txt http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt |
| eCos license version 2.0 eCos-2.0 eCos-2.0.txt http://www.gnu.org/licenses/ecos-license.html |
| BSD 2-Clause License BSD-2-Clause Y bsd-2-clause.txt http://spdx.org/licenses/BSD-2-Clause |
| BSD 3-clause "New" or "Revised" License BSD-3-Clause Y bsd-3-clause.txt http://spdx.org/licenses/BSD-3-Clause#licenseText |
| IBM PIBS (PowerPC Initialization and IBM-pibs ibm-pibs.txt |
| Boot Software) license |
| ISC License ISC Y isc.txt https://spdx.org/licenses/ISC |
| X11 License X11 x11.txt https://spdx.org/licenses/X11.html |