This commit changes the working directory
where the build process occurs.

Before this commit, build process occurred under the source
tree for both in-tree and out-of-tree build.

That's why we needed to add $(obj) prefix to all generated
files in makefiles like follows:
  $(obj)u-boot.bin:  $(obj)u-boot

Here, $(obj) is empty for in-tree build, whereas it points
to the output directory for out-of-tree build.

And our old build system changes the current working directory
with "make -C <sub-dir>" syntax when descending into the
sub-directories.

On the other hand, Kbuild uses a different idea
to handle out-of-tree build and directory descending.

The build process of Kbuild always occurs under the output tree.
When "O=dir/to/store/output/files" is given, the build system
changes the current working directory to that directory and
restarts the make.

Kbuild uses "make -f $(srctree)/scripts/Makefile.build obj=<sub-dir>"
syntax for descending into sub-directories.
(We can write it like "make $(obj)=<sub-dir>" with a shorthand.)
This means the current working directory is always the top
of the output directory.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Tested-by: Gerhard Sittig <gsi@denx.de>

The vexpress_aemv8a is the first aarch64 board in U-Boot.
As it was introduced, it gets built when "MAKEALL -a arm"
is invoked, and fails as this command is run with a 32-bit,
not 64-bit, toolchain as the cross-compiler.

Introduce 'aarch64' as a valid 'MAKEALL -a' argument, treated
as 'arm' for all other intents, and change the architecture
of the vexpress_aemv8a entry in boards.cfg from 'arm' to
'aarch64'.

In-tree build:
  - Do not create a symbolic link
      from include/asm to arch/${ARCH}/include/asm
  - Add ${SRCTREE}/arch/arm/include into the header search path

Out-of-tree build:
  - Do not create a directory ${OBJTREE}/include2
  - Do not create a symbolic link
      from ${OBJTREE}/include2/asm to ${SRCTREE}/arch/${ARCH}/include/asm
  - Add ${SRCTREE}/arch/arm/include into the header search path

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

Put all informations about targets, including state (active or
orphan) and maintainers, in boards.cfg; remove MAINTAINERS;
adjust the build system accordingly.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>

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 lincenses 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 Lincense 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+

We use the SPDX Unique Lincense Identifiers here; these are available
at [2].

Note: From the legal point of view, this patch is supposed to be only
a change to the textual representation of the license information,
but in no way any change to the actual license terms. With this patch
applied, all files will still be licensed under the same terms they
were before.

Note 2: The apparent difference between the old "COPYING" and the new
"Licenses/gpl-2.0.txt" only results from switching to the upstream
version of the license which is differently formatted; there are not
any actual changes to the content.

Note 3: There are some recurring questions about linense issues, such
as:
    - Is a "All Rights Reserved" clause a problem in GPL code?
    - Are files without any license header a problem?
    - Do we need license headers at all?

The following excerpt from an e-mail by Daniel B. Ravicher should help
with these:

| Message-ID: <4ADF8CAA.5030808@softwarefreedom.org>
| Date: Wed, 21 Oct 2009 18:35:22 -0400
| From: "Daniel B. Ravicher" <ravicher@softwarefreedom.org>
| To: Wolfgang Denk <wd@denx.de>
| Subject: Re: GPL and license cleanup questions
|
| Mr. Denk,
|
| Wolfgang Denk wrote:
| > - There are a number of files which do not include any specific
| > license information at all. Is it correct to assume that these files
| > are automatically covered by the "GPL v2 or later" clause as
| > specified by the COPYING file in the top level directory of the
| > U-Boot source tree?
|
| That is a very fact specific analysis and could be different across the
| various files.  However, if the contributor could reasonably be expected
| to have known that the project was licensed GPLv2 or later at the time
| she made her contribution, then a reasonably implication is that she
| consented to her contributions being distributed under those terms.
|
| > - Do such files need any clean up, for example should we add GPL
| > headers to them, or is this not needed?
|
| If the project as a whole is licensed under clear terms, you need not
| identify those same terms in each file, although there is no harm in
| doing so.
|
| > - There are other files, which include both a GPL license header
| > _plus_ some copyright note with an "All Rights Reserved" clause. It
| > has been my understanding that this is a conflict, and me must ask
| > the copyright holders to remove such "All Rights Reserved" clauses.
| > But then, some people claim that "All Rights Reserved" is a no-op
| > nowadays. License checking tools (like OSLC) seem to indicate this is
| > a problem, but then we see quite a lot of "All rights reserved" in
| > BSD-licensed files in gcc and glibc. So what is the correct way to
| > deal with such files?
|
| It is not a conflict to grant a license and also reserve all rights, as
| implicit in that language is that you are reserving all "other" rights
| not granted in the license.  Thus, a file with "Licensed under GPL, All
| Rights Reserved" would mean that it is licensed under the GPL, but no
| other rights are given to copy, modify or redistribute it.
|
| Warm regards,
| --Dan
|
| Daniel B. Ravicher, Legal Director
| Software Freedom Law Center (SFLC) and Moglen Ravicher LLC
| 1995 Broadway, 17th Fl., New York, NY 10023
| (212) 461-1902 direct  (212) 580-0800 main  (212) 580-0898 fax
| ravicher@softwarefreedom.org   www.softwarefreedom.org

[1] http://spdx.org/
[2] http://spdx.org/licenses/



Signed-off-by: Wolfgang Denk <wd@denx.de>

This reverts commit 1285a280 since the migration
of boards from Makefile to boards.cfg is now complete.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>

This patch adds support for networking in SPL. Some devices are
capable of loading SPL via network so it makes sense to load the
main U-Boot binary via network too. This patch tries to use
existing network code as much as possible. Unfortunately, it depends
on environment which in turn depends on other code so SPL size
is increased significantly. No effort was done to decouple network
code and environment so far.

Signed-off-by: Ilya Yanok <ilya.yanok@cogentembedded.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Tom Rini <trini@ti.com>

This adds some cleanup to mkconfig related to SPL support.  Bash
specific script has been replaced with awk for better shell
compatibility.  config.mk generation is done through a subshell and
single redirect to improve readability.

Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

Add support for specifying a differnt CPU for main u-boot and SPL
u-boot builds.  This is done by adding an optional SPL CPU after the
main CPU in boards.cfg as follows:

     normal_cpu:spl_cpu

This this case CPU will be set to "normal_cpu" during the main u-boot
build and "spl_cpu" during the SPL build.

Signed-off-by: Allen Martin <amartin@nvidia.com>

This can be useful for generic scripts. For example, rather than hard-
coding a script to ext2load tegra-harmony.dtb, it could load
${soc}-${board}.dtb and hence not need adjustments to run on multiple
boards.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

We provide a default table of { 9600, 19200, 38400, 57600, 115200 }
in <config_fallbacks.h> which mkconfig places after <configs/...h> in
the generated config file.  This is used when a board has not set its
own table.

Signed-off-by: Tom Rini <trini@ti.com>

Now that we've got boards.cfg and most people have converted over,
start warning people who have yet to so we can phase board configs
completely out of the Makefile.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Parsing of boards.cfg fails on FreeBSD with the error:

sed: 1: "/=/ {s/=/\t/;q } ; { s/ ...": extra characters at the end
of q command

BSD sed expects commands to be on seperate 'lines', hence it expects
an additional ; before the closing brackets.
BSD sed does not support \t, replaced by literal tab.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Cc: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>

When building with srctree != objtree, the build creates arch/soc/cpu
specific symlinks in the source tree.  This means that the same source
tree can't be used for multiple builds at the same time.  Also, these
symlinks in the source tree are only cleaned up if one passes the same
O= to distclean.

When srctree != objtree, mkconfig creates an $objtree/include2 directory
in the objtree to host the asm -> arch/$arch/include/asm symlink so that
"#include <asm>" can be used.  But it also creates another identical
symlink in $objtree/include.

Then, mkconfig creates two symlinks:
$objtree/include/asm/arch -> arch/$arch/include/asm/arch-$cpu (or $soc)
$objtree/include/asm/proc -> arch/$arch/include/asm/proc-armv (on arm)
but because $objtree/include/asm points at $srctree already, the two
symlinks are created under $srctree.

To fix this, create a real $objtree/include/asm directory, instead of a
symlink.  Update cleanup code accordingly.

Signed-off-by: Loïc Minier <loic.minier@linaro.org>

We have config_defaults.h which are random configuration settings that
everyone gets by default.  We also have config_cmd_default.h which is a
recommended list of defaults but boards have to opt into.  Now we have
config_cmd_defaults.h which is a list of defaults that everyone gets
and has to actively opt out of.

For now, we populate it with the bootm command which previously was
unable to be disabled.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

When planning for more generalization and Makefile cleanup it became
obvious that the introduction of a separate CONFIG_MK_ name space for
config options that were set through scripting in the Makefile was
not a good idea.

Originally the idea was to provide a script-free approach to supply
configuration options - there was no real need for a separate name
space. But when we now convert the existing Makefile entries to make
use of this approach, it would mean that we have to touch a large
number of board config files and add #ifdef / #define sequences to
"convert" from the CONFIG_MK_ to the CONFIG_ name space.

It seems much cleaner to get rid of this somewhat arbitrary _MK
string now for the few boards that actually use it.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>

There are some boards where it's currently not possible to detect all
board information at runtime, therefore a new column was added to
boards.cfg .

This column can contain multiple options: a board configuration name,
optionally followed by a colon (':') and a list of options, which are
separated by comma (',').

In case of simple options like '256M_U_BOOT', these expand to
"#define CONFIG_MK_256M_U_BOOT 1" in config.h . In case of
assignments like 'RAM=8192', these expand to "#define CONFIG_MK_RAM
8192" in config.h .

Example:

	FOO:HAS_BAR,BAZ=64

means:
	- the name of the board config file is include/configs/FOO.h
	- the generated file include/config.h will contain these
	  lines:

		#define CONFIG_HAS_BAR  1
		#define CONFIG_BAZ  64

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>

[wd@denx.de: edited commit message; added code to deal with an
optional board configuration name]

Signed-off-by: Wolfgang Denk <wd@denx.de>

Instead of adding explicit build rules for each and every board to the
top level Makefile (which makes it grow and grow), we now provide a
simple default rule and extend the "mkconfig" script to read board
configurations from a plain text file (table), "boards.cfg".

For simple boards it is now sufficient to add a single line of text to
the "boards.cfg" file, no changes to the top level Makefile are needed
any more.

To make the table better readable, change the notation for unused
fields from "NULL" into "-".

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Mike Frysinger <vapier@gentoo.org>

Instead of stripping the "_config" part from the make target names in
each call of the "mkconfig" script let this script strip the string.

This prepares the ground for forther simplification of the top level
Makefile.

Signed-off-by: Wolfgang Denk <wd@denx.de>

This helps to clean up the include/ directory so that it only contains
non-architecture-specific headers and also matches Linux's directory
layout which many U-Boot developers are already familiar with.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

There are a bunch of features in U-Boot that we want to enable by default,
and it's best if we centralize them in one place rather than updating all
the board files out there.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Refuse to setup a platform if the command line ARCH= is not the same
as the one required for the board. This prevents any user with
prehistoric aliases from messing up their builds.

Reported in thread:
http://old.nabble.com/-U-Boot--Build-breaks-on-some-OMAP3-configs-to26132721.html

Inputs from: Mike Frysinger and Wolfgang Denk:
http://lists.denx.de/pipermail/u-boot/2009-November/063642.html



Cc: Wolfgang Denk <wd@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Dirk Behme <dirk.behme@googlemail.com>
Signed-off-by: Nishanth Menon <nm@ti.com>

This patch extends the mkconfig script to automatically create a define
for the board directory in include/config.h:

#define CONFIG_BOARDDIR board/amcc/canyonlands

This is needed for the upcoming PPC4xx linker script consolidation,
where the PPC440 platforms need to include a board specific file in
the common linker script.

Signed-off-by: Stefan Roese <sr@denx.de>

To simplify the top level makefile it useful to be able to parse
the top level makefile target to multiple individual target, then
put them to the config.h, leave the board config file to handle
the different targets.

Note that this method uses the '_'(underline) as the delimiter when
splits the board make target.

Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>

This also reverts commit 511c02f6.

Signed-off-by: Wolfgang Denk <wd@denx.de>

Then we can handle different config targets in the board file, which
simplifies the top level Makefile for boards that have multiple
config targets.

Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>

To simplify the top level makefile it useful to be able to parse
the top level makefile target to multiple individual target, then
put them to the config.h, leave the board config file to handle
the different targets.

Note that this method uses the '_'(underline) as the delimiter when
splits the board make target.

Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>

This also reverts commit 511c02f6.

Signed-off-by: Wolfgang Denk <wd@denx.de>

Then we can handle different config targets in the board file, which
simplifies the top level Makefile for boards that have multiple
config targets.

Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>

swapping the include order suppresses warnings for board configs
that define their own CONFIG_MAX_MEM_MAPPED:

In file included from /home/r1aaha/git/u-boot/include/config.h:5,
                from /home/r1aaha/git/u-boot/include/common.h:35,
                from simpc8313.c:26:
/home/r1aaha/git/u-boot/include/configs/SIMPC8313.h:81:1: warning:
"CONFIG_MAX_MEM_MAPPED" redefined
In file included from /home/r1aaha/git/u-boot/include/config.h:4,
                from /home/r1aaha/git/u-boot/include/common.h:35,
                from simpc8313.c:26:
/home/r1aaha/git/u-boot/include/asm/config.h:28:1: warning: this is
the location of the previous definition

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

We have common defines that we duplicate in various ways.  Having an
arch specific config.h gives us a common location for those defines.

Eventually we should be able to replace this when we have proper
Kconfig support.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

Modifications are based on the linux kernel approach and
support two use cases:

  1) Add O= to the make command line
  'make O=/tmp/build all'

  2) Set environement variable BUILD_DIR to point to the desired location
  'export BUILD_DIR=/tmp/build'
  'make'

The second approach can also be used with a MAKEALL script
'export BUILD_DIR=/tmp/build'
'./MAKEALL'

Command line 'O=' setting overrides BUILD_DIR environent variable.

When none of the above methods is used the local build is performed and
the object files are placed in the source directory.

  - make highboot configurations use environment at high end, too,
    to avoid flash fragmentation
  - always use redundand environment
  - don't enable video code for modules without graphics controller
  - provide useful (though different) mtdparts settings
  - get rid of CONFIG_CS_AUTOCONF which was always set anyway

* Extend mkconfig tool to print more useful target name

Patch by Murray Jensen, 18 Jul 2005

- create SoC specific directories include/asm-arm/arch-imx and
  include/asm-arm/arch-s3c24x0

- Introducing the concept of SoCs "./cpu/$(CPU)/$(SOC)"
- creating subdirs for SoCs ./cpu/arm920t/imx and ./cpu/arm920t/s3c24x0
- moving SoC specific code out of cpu/arm920t/ into cpu/arm920t/$(SOC)/
- moving drivers/s3c24x0_i2c.c and drivers/serial_imx.c out of drivers/
  into cpu/arm920t/$(SOC)/

* Patch by Murray Jensen, 24 Jun 2003:
  - make sure to use only U-boot provided header files
  - fix problems with ".rodata.str1.4" section as used by GCC-3.x