Currently, all in-tree .dts files (apart from some under test/ and
tools/), reside in arch/$ARCH/dts. However, in the linux kernel tree,
dts files for arm64 boards, and probably in the not too distant
future [1], arm boards as well, live in subdirectories of that.

For private forks, using a vendor or project subdirectory is also more
convenient to clearly separate private code from upstream - in the
same way that code under board/ is also split and easy to maintain.

In order to prepare for us to follow suit and do the splitting of the
in-tree .dts files, and to make life a little easier for private forks
that already place dts files not directly in arch/$ARCH/dts, change
the $(srctree)/arch/$(ARCH)/dts path to instead refer to the directory of
the .dts file being compiled. This should be a no-op for all existing
cases.

[1] https://lore.kernel.org/lkml/20220328000915.15041-1-ansuelsmth@gmail.com/

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>

[Linux commit 363547d2191c]

Currently DTB Overlays (.dtbo) are build from source files with the same
extension (.dts) as the base DTs (.dtb). This may become confusing and
even lead to wrong results. For example, a composite DTB (created from a
base DTB and a set of overlays) might have the same name as one of the
overlays that create it.

Different files should be generated from differently named sources.
 .dtb  <-> .dts
 .dtbo <-> .dtso

We do not remove the ability to compile DTBO files from .dts files here,
only add a new rule allowing the .dtso file name. The current .dts named
overlays can be renamed with time. After all have been renamed we can
remove the other rule.

[Import notes: Adapt to U-Boot by using the cmd_dtco function instead
of cmd_dtc just like the current .dts -> .dtbo rule.]

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Simon Glass <sjg@chromium.org>

[Linux commit b8fc5b2157b1]

If dtc is rebuilt, we should rebuild .dtb files with the new dtc.

[Import notes: Back then there was no .dtbo rule in Linux's
Makefile.lib, but the current .dtbo rules in Linux also have the
$(DTC) dependency, so also add it to our .dtbo rule.]

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Simon Glass <sjg@chromium.org>

Add a CONFIG option to deal with this automatically, printing a warning
when U-Boot starts up. This can be useful if the device tree comes from
another project.

We will maintain this through the 2023.07 release, providing 6 months
for people to notice.

Signed-off-by: Simon Glass <sjg@chromium.org>
Version 4:
Acked-by: Michal Simek <michal.simek@amd.com>

We borrow from the Linux Kernel 0d362be5b142 ("Makefile: link with -z
noexecstack --no-warn-rwx-segments") here to disable the RWX segment
linking warnings. We do not also bring in -z noexecstack as that
requires auditing and using ".note.GNU-stack" on assembly functions
which do need this feature. Further, we now introduce KBUILD_EFILDFLAGS
so that we can also pass --no-warn-rwx-segments when linking EFI
applications, and those do explicitly pass -z execstack.

Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

When linking EFI binaries the linker emits:

    ld.bfd: warning: lib/efi_loader/efi_crt0.o:
    missing .note.GNU-stack section implies executable stack

Suppress the warning.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

Add a make command to compile binary files as C data through bin2c with

    $(call,bin2c,<data_name_prefix>)

Note that this requires BUILD_BIN2C=y.

Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>

Add support for VPL, a new phase of U-Boot. This runs after TPL. It is
responsible for selecting which SPL binary to run, based on a
verified-boot process.

Signed-off-by: Simon Glass <sjg@chromium.org>

As in ASL case use same basic set of the inclusions.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

There is a conflict between the static file
lib/acpi/dsdt.c and the file dsdt.c generated
dynamicaly by scripts/Makefile.lib. When a
mrproper is done, the static file dsdt.c is
removed. If a build with acpi enabled is
launched after, the following error is raised:

  CC      lib/acpi/acpi_table.o
make[2]: *** No rule to make target 'lib/acpi/dsdt.asl', needed by 'lib/acpi/dsdt.c'.  Stop.
scripts/Makefile.build:394: recipe for target 'lib/acpi' failed

To avoid such error, the generated file is named
dsdt_generated.c instead of dstdt.c.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Tested-by: Heiko Thiery <heiko.thiery@gmail.com>