SPDX-License-Identifier: GPL-2.0

    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].

  
  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+ OR 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].

  License identifier syntax
  -------------------------
  
  1. Placement:
  
     The SPDX license identifier in U-Boot files shall be added at the first
     possible line in a file which can contain a comment.  For the majority
     or files this is the first line, except for scripts which require the
     '#!PATH_TO_INTERPRETER' in the first line.  For those scripts the SPDX
     identifier goes into the second line.
  
  |
  
  2. Style:
  
     The SPDX license identifier is added in form of a comment.  The comment
     style depends on the file type::
  
        C source:	// SPDX-License-Identifier: <SPDX License Expression>
        C header:	/* SPDX-License-Identifier: <SPDX License Expression> */
        ASM:	/* SPDX-License-Identifier: <SPDX License Expression> */
        scripts:	# SPDX-License-Identifier: <SPDX License Expression>
        .rst:	.. SPDX-License-Identifier: <SPDX License Expression>
        .dts{i}:	// SPDX-License-Identifier: <SPDX License Expression>
  
     If a specific tool cannot handle the standard comment style, then the
     appropriate comment mechanism which the tool accepts shall be used. This
     is the reason for having the "/\* \*/" style comment in C header
     files. There was build breakage observed with generated .lds files where
     'ld' failed to parse the C++ comment. This has been fixed by now, but
     there are still older assembler tools which cannot handle C++ style
     comments.
  
  |
  
  3. Syntax:
  
     A <SPDX License Expression> is either an SPDX short form license
     identifier found on the SPDX License List, or the combination of two
     SPDX short form license identifiers separated by "WITH" when a license
     exception applies. When multiple licenses apply, an expression consists
     of keywords "AND", "OR" separating sub-expressions and surrounded by
     "(", ")" .
  
     License identifiers for licenses like [L]GPL with the 'or later' option
     are constructed by using a "+" for indicating the 'or later' option.::
  
        // SPDX-License-Identifier: GPL-2.0+
        // SPDX-License-Identifier: LGPL-2.1+
  
     WITH should be used when there is a modifier to a license needed.
     For example, the linux kernel UAPI files use the expression::
  
        // SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
        // SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note
  
     Other examples using WITH exceptions found in the linux kernel are::
  
        // SPDX-License-Identifier: GPL-2.0 WITH mif-exception
        // SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
  
     Exceptions can only be used with particular License identifiers. The
     valid License identifiers are listed in the tags of the exception text
     file.
  
     OR should be used if the file is dual licensed and only one license is
     to be selected.  For example, some dtsi files are available under dual
     licenses::
  
        // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
  
     Examples from U-Boot for license expressions in dual licensed files::
  
        // SPDX-License-Identifier: GPL-2.0 OR MIT
        // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
  
     AND should be used if the file has multiple licenses whose terms all
     apply to use the file. For example, if code is inherited from another
     project and permission has been given to put it in U-Boot, but the
     original license terms need to remain in effect::
  
        // SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) AND MIT
  
     Another other example where both sets of license terms need to be
     adhered to is::
  
        // SPDX-License-Identifier: GPL-1.0+ AND LGPL-2.1+

  [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

  SIL OPEN FONT LICENSE (OFL-1.1)			OFL-1.1		Y		OFL.txt			https://spdx.org/licenses/OFL-1.1.html

  X11 License					X11				x11.txt			https://spdx.org/licenses/X11.html