For compatibility clang will report some gcc version.  However since we
are checking gcc versions in order to then fail to build, we should
limit these tests only to when we are using gcc and not clang.
Signed-off-by: NTom Rini <trini@konsulko.com>

Commit 47ed5dd0 dropped the .got section from U-Boot binaries. This is needed
for some relocations, and causes failures if missing. Add it back.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Move the option to Kconfig renaming it to CONFIG_HAVE_GENERIC_BOARD.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NAlexey Brodkin <abrodkin@synopsys.com>

Resynchronize memcpy/memset with kernel 3.17 and build them in
Thumb2 mode (unified syntax). Those assembler files can be built
and linked in ARM mode too, however when calling them from Thumb2
built code, the stack got corrupted and the copy did not succeed
(the exact details have not been traced back). However, the Linux
kernel builds those files in Thumb2 mode. Hence U-Boot should
build them in Thumb2 mode too when CONFIG_SYS_THUMB_BUILD is set.

To build the files without warning, some assembler instructions
had to be replaced with their UAL compliant variant (thanks
Jeroen for this input).

To build the file in Thumb2 mode the implicit-it=always option need
to be set to generate Thumb2 compliant IT instructions where needed.
We add this option to the general AFLAGS when building for Thumb2.
Reviewed-by: NSimon Glass <sjg@chromium.org>
Tested-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NStefan Agner <stefan@agner.ch>

CONFIG_${ARCH} is defined by Kconfig.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

In anticipation of refactoring the HYP/non-secure code to run
from secure RAM, add a new linker section that will contain that
code.

Nothing is using it just yet.
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Acked-by: NIan Campbell <ijc@hellion.org.uk>

Fixes a bug when objcopy doesn't put .dtb.init.rodata section to resulting
u-boot.bin, so u-boot was unable to find embedded DTB.

After Kbuild introduction, the CROSS_COMPILE environment variable has been
set to some default value (prefix arm-linux-).

This shall be removed since it breaks building u-boot for native arm target
(like qemu ARM).
Moreover not all compilers have arm-linux- prefix.

Additionally the u-boot cross compiles with CROSS_COMPILE= set explicitly-
e.g.:
CROSS_COMPILE=/ .... /arm-v7a-linux-gnueabi- make
Signed-off-by: NLukasz Majewski <l.majewski@samsung.com>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>

Signed-off-by: NStefano Babic <sbabic@denx.de>

"checkthumb" makes sense only for ARM architecture.
Move it to arch/arm/config.mk.

To make sure gcc supports THUMB mode before beginning build,
run "checkthumb" during "archprepare".
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>

The syntax
  CROSS_COMIPLE ?= <cross_compiler_prefix>
does not work because config.mk is parsed after
exporting CROSS_COMPILE.

Like Linux Kernel's arch/$(ARCH)/Makefile,
we must write as follows:

  ifeq ($(CROSS_COMPILE),)
  CROSS_COMPILE := <cross_compiler_prefix>
  endif
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>

We had switched to Kbuild so now we can specify
PLATFORM_LIBS/PLATFORM_LIBGCC with relative path.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: NTom Rini <trini@ti.com>
Acked-by: NSimon Glass <sjg@chromium.org>
Tested-by: NSimon Glass <sjg@chromium.org>

This commit avoids generating ./SPL twice.
  - Fist time descending to spl/
  - Second time as a prerequisite of u-boot-with-spl.imx,
    u-boot-with-nand-spl.imx.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>

Rename OBJCFLAGS to OBJCOPYFLAGS beforehand to use
"cmd_objcopy" in scripts/Makefile.lib in an upcoming commit.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>

Before this commit, all arch/arm/cpu/${CPU}/config.mk except ARMv8
had the same option:
$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))

This commit moves it into arch/arm/config.mk.

If the compiler does not support the option,
it is ignored by $(call cc-option,...).
So this commit gives no harm to ARMv8.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>

Some targets will build fine but not boot if sections .hash and
.got.plt are not present in the binary. Add them back.

Also, Exynos machines require .machine_param section in SPL.
Add it.
Signed-off-by: NAlbert ARIBAUD <albert.u.boot@aribaud.net>
Tested-by: NRajeshwari S Shinde <rajeshwari.s@samsung.com>

Relocation code based on a patch by Scott Wood, which is:
Signed-off-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NDavid Feng <fenghua@phytium.com.cn>

Current LDS files /DISCARD/ a lot of sections when linking ELF
files, causing diagnostic tools such as readelf or objdump to
produce partial output. Keep all section at link stage, filter
only at objcopy time so that .bin remains minimal.
Signed-off-by: NAlbert ARIBAUD <albert.u.boot@aribaud.net>
Reviewed-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>

Signed-off-by: NWolfgang Denk <wd@denx.de>
[trini: Drop changes for PEP 4 following python tools]
Signed-off-by: NTom Rini <trini@ti.com>

To be more EABI compliant and as a preparation for building
with clang, use the platform-specific r9 register for gd
instead of r8.

note: The FIQ is not updated since it is not used in u-boot,
and under discussion for the time being.

The following checkpatch warning is ignored:
WARNING: Use of volatile is usually wrong: see
Documentation/volatile-considered-harmful.txt
Signed-off-by: NJeroen Hofstee <jeroen@myspectrum.nl>
cc: Albert ARIBAUD <albert.u.boot@aribaud.net>

Every ARM cpu config.mk (arch/arm/cpu/{CPUDIR}/config.mk) defines:

PLATFORM_RELFLAGS += -fno-common -ffixed-r8 -msoft-float

So, this patch moves the common compiler options to arch/arm/config.mk.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>

The movt/movw instruction can be used to hardcode an
memory location in the instruction itself. The linker
starts complaining about this if the compiler decides
to do so: "relocation R_ARM_MOVW_ABS_NC against `a local
symbol' can not be used" and it is not support by U-boot
as well. Prevent their use by requiring word relocations.
This allows u-boot to be build at other optimalization
levels then -Os.
Signed-off-by: NJeroen Hofstee <jeroen@myspectrum.nl>
Cc: TigerLiu@viatech.com.cn
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: NSimon Glass <sjg@chromium.org>

Adding a new CONFIG_OMAP_COMMON which is included by all boards
that needs to build cpu/armv7/omap-common folder.
Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com>

Signed-off-by: NWolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: NTom Rini <trini@ti.com>

Add a Makefile target ('checkarmreloc') which
fails if the ELF binary contains relocation records
of types other than R_ARM_RELATIVE.
Signed-off-by: NAlbert ARIBAUD <albert.u.boot@aribaud.net>
Tested-by: NLubomir Popov <lpopov@mm-sol.com>
Tested-by: NJeroen Hofstee <jeroen@myspectrum.nl>
Reviewed-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>

While other architectures have enabled these gcc / ld options for some
time on U-Boot itself, ARM has only been doing this on SPL.  Enable this
on full U-Boot as well now.

Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: NTom Rini <trini@ti.com>

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

All of these platforms have memory starting at 0x80000000, so this is
the correct CONFIG_STANDALONE_LOAD_ADDR for all of them.
Acked-by: NPeter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: NTom Rini <trini@ti.com>

This enables generic board support so that ARM boards can define
CONFIG_SYS_GENERIC_BOARD.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Disable sibling call optimization based on binutils version.  This is
to work around a bug in the assember in binutils versions < 2.22.
Branches to weak symbols can be incorrectly optimized in thumb mode to
a short branch (b.n instruction) that won't reach when the symbol gets
preempted.

http://sourceware.org/bugzilla/show_bug.cgi?id=12532Signed-off-by: NAllen Martin <amartin@nvidia.com>
Acked-by: NTom Rini <trini@ti.com>

This rule confirms that if we're on ARM and we have enabled THUMB builds
that we have a new enough toolchain to produce a working binary.

Changes in v2:
- Switch to ALL-$(CONFIG_SYS_THUMB_BUILD) in arch/arm/config.mk (Mike F)
- Simplfy checkthumb test after doing the above
Signed-off-by: NTom Rini <trini@ti.com>
Acked-by: NMike Frysinger <vapier@gentoo.org>

Enable Thumb build and ARM-Thumb interworking based on the new
config flag CONFIG_SYS_THUMB_BUILD
Signed-off-by: NAneesh V <aneesh@ti.com>
Acked-by: NMike Frysinger <vapier@gentoo.org>

This is set by the top level Makefile anyway, so drop it. This does
have the effect of changing the order - now the board link script will
have preference over the CPU one. But this seems more correct anyway.
Signed-off-by: NSimon Glass <sjg@chromium.org>

U-Boot Makefiles contain a number of tests for compiler features etc.
which so far are executed again and again.  On some architectures
(especially ARM) this results in a large number of calls to gcc.

This patch makes sure to run such tests only once, thus largely
reducing the number of "execve" system calls.

Example: number of "execve" system calls for building the "P2020DS"
(Power Architecture) and "qong" (ARM) boards, measured as:
	-> strace -f -e trace=execve -o /tmp/foo ./MAKEALL <board>
	-> grep execve /tmp/foo | wc -l

	Before: After:	Reduction:
==================================
P2020DS 20555	15205	-26%
qong	31692	14490	-54%

As a result, built times are significantly reduced, typically by
30...50%.
Signed-off-by: NWolfgang Denk <wd@denx.de>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Albert Aribaud <albert.aribaud@free.fr>
cc: Graeme Russ <graeme.russ@gmail.com>
cc: Mike Frysinger <vapier@gentoo.org>
Tested-by: NGraeme Russ <graeme.russ@gmail.com>
Tested-by: NMatthias Weisser <weisserm@arcor.de>
Tested-by: NSanjeev Premi <premi@ti.com>
Tested-by: NSimon Glass <sjg@chromium.org>
Tested-by: NMacpaul Lin <macpaul@gmail.com>
Acked-by: NMike Frysinger <vapier@gentoo.org>

Signed-off-by: NAneesh V <aneesh@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>

Signed-off-by: NMichael Schwingen <michael@schwingen.org>

Currently, some linker scripts are found by common code in config.mk.
Some are found using CONFIG_SYS_LDSCRIPT, but the code for that is
sometimes in arch config.mk and sometimes in board config.mk.  Some
are found using an arch-specific rule for looking in CPUDIR, etc.

Further, the powerpc config.mk rule relied on CONFIG_NAND_SPL
when it really wanted CONFIG_NAND_U_BOOT -- which covered up the fact
that not all NAND_U_BOOT builds actually wanted CPUDIR/u-boot-nand.lds.

Replace all of this -- except for a handful of boards that are actually
selecting a linker script in a unique way -- with centralized ldscript
finding.

If board code specifies LDSCRIPT, that will be used.
Otherwise, if CONFIG_SYS_LDSCRIPT is specified, that will be used.

If neither of these are specified, then the central config.mk will
check for the existence of the following, in order:

$(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds (only if CONFIG_NAND_U_BOOT)
$(TOPDIR)/$(CPUDIR)/u-boot-nand.lds (only if CONFIG_NAND_U_BOOT)
$(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
$(TOPDIR)/$(CPUDIR)/u-boot.lds

Some boards (sc3, cm5200, munices) provided their own u-boot.lds that
were dead code, because they were overridden by a CPUDIR u-boot.lds under
the old powerpc rules.  These boards' own u-boot.lds have bitrotted and
no longer work -- these lds files have been removed.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Tested-by: NGraeme Russ <graeme.russ@gmail.com>

Rename STANDALONE_LOAD_ADDR into CONFIG_STANDALONE_LOAD_ADDR
and allow that the architecture-specific default value gets
overwritten by defining the value in the board header file.
Signed-off-by: NWolfgang Denk <wd@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Cc: Tsi Chung Liew <tsi-chung.liew@freescale.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

Commit 8aba9dce breaks
ARM boards because for ARM the -pie option is used
for partial linking together with -r option.

The patch adds the -pie option to link u-boot.bin only.
Signed-off-by: NStefano Babic <sbabic@denx.de>
CC: Jason Liu <liu.h.jason@gmail.com>
CC: lool@dooz.org
CC: Wolfgang Denk <wd@denx.de>
CC: Albert Aribaud <albert.aribaud@free.fr>
Tested-by: NAlexander Holler <holler@ahsoftware.de>

When this define was introduced, the idea was to provide a soft
migration path for ARM boards to get adapted to the new relocation
support.  However, other recent changes led to a different
implementation (ELF relocation), where this no longer works.  By now
CONFIG_SYS_ARM_WITHOUT_RELOC does not only not help any more, but it
actually hurts because it obfuscates the actual code by sprinkling it
with lots of dead and non-working debris.

So let's make a clean cut and drop CONFIG_SYS_ARM_WITHOUT_RELOC.
Signed-off-by: NWolfgang Denk <wd@denx.de>
Tested-by: NHeiko Schocher <hs@denx.de>
Tested-by: NReinhard Meyer <u-boot@emk-elektronik.de>