kbuild: add KBUILD_DEFCONFIG ...

This allows "make ARCH=... defconfig".

Fox example, you can type "make defconfig" instead of
"make sandbox_defconfig".

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: avoid symbol conflict for fstat ...

Recently, a fstat function was added to barebox. Redefine it as usual
to avoid problems for the sandbox. This fixes loading files into the
sandbox.

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: only test for sdl libs when sdl is enabled ...

Otherwise we get the following warning when sdl is not installed
on the compile host:

Package sdl was not found in the pkg-config search path.
Perhaps you should add the directory containing `sdl.pc'
to the PKG_CONFIG_PATH environment variable
No package 'sdl' found

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: add sdl video support ...

This will allow speed up the dev on framebuffer.

By default the resolution is VGA but this can be changed via cmdline.

We use a pthread to Flip the screen every 100ms as we can not detect when
barebox update it as barebox simpliy write in a buffer.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: move ELFCLASS detection to asm/elf.h ...

now we can detect the host build from gcc macro
and cross compile the sandbox

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Loïc Minier <loic.minier@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'master' into next

sandbox: simplify linker script ...

let the linker to provide the basic linker script

just insert the commands and initcalls before the .rodata section

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

sandbox: move __SANDBOX__ to Makefile ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Only pass -P to cpp when generating ld scripts ...

When building sandbox with ccache, one would hit warnings such as:
    warning: 'struct mmsghdr' declared inside parameter list
on random files; a way to reproduce this issue is to build a simple
file doing just:
    #include <sys/socket.h>

    int main(void) {
        return 0;
    }

    gcc -Wall -P -c -o foo foo.c

But actually the -P flag is only useful when generating non-C files,
such as linker scripts in the case of barebox.  Removing the -P flag
from all the gcc invocations, except when generating .lds files makes
the warning go away.  It turns out that this is what
linux/scripts/Makefile.build also does nowadays.

Signed-off-by: Loïc Minier <loic.minier@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

move boards to arch/<architecure>/boards ...

this will allow each arch to handle the boards more simply and depending on
there need

the env var BOARD will refer to the current board dirent

for sandbox as we have only one board the board dirent is arch/sandbox/board

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

rename U-Boot-v2 project to barebox ...

This has been done with the following script:

find -path ./.git -prune -o -type f -print0 | xargs -0 -r sed -i \
	-e 's/u2boot/barebox/g' \
	-e 's/U2Boot/barebox/g' \
	-e 's/U-boot V2/barebox/g' \
	-e 's/u-boot v2/barebox/g' \
	-e 's/U-Boot V2/barebox/g' \
	-e 's/U-Boot-v2/barebox/g' \
	-e 's/U_BOOT/BAREBOX/g' \
	-e 's/UBOOT/BAREBOX/g' \
	-e 's/uboot/barebox/g' \
	-e 's/u-boot/barebox/g' \
	-e 's/u_boot/barebox/g' \
	-e 's/U-Boot/barebox/g' \
	-e 's/U-boot/barebox/g' \
	-e 's/U-BOOT/barebox/g'

find -path ./.git -prune -o \( -name "*u-boot*" -o -name "*uboot*" -o -name "*u_boot*" \) -print0 | \
	xargs -0 -r rename 's/u[-_]?boot/barebox/'

It needs some manual fixup following in the next patch

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

[SANDBOX] Move include/asm-sandbox/arch-* to arch/sandbox/*/include/mach ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

sandbox: use libc ioctl for os part ...

Signed-off-by: Sascha Hauer <sha@pengutronix.de>

sandbox: Fix generation of linker script ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Sandbox: Fix make system ...

Sandbox compilation failed with:

gcc -Wp,-MD,arch/sandbox/lib/.tap.o.d  -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/4.3.1/include -I/usr/include -Iinclude -P -Wall    -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(tap)"  -D"KBUILD_MODNAME=KBUILD_STR(tap)" -c -o arch/sandbox/lib/tap.o arch/sandbox/lib/tap.c
In file included from /usr/include/bits/socket.h:32,
                 from /usr/include/sys/socket.h:36,
                 from arch/sandbox/lib/tap.c:29:
/usr/include/limits.h:125:26: error: limits.h: No such file or directory

/usr/include/limits.h uses the next_include directive
This was because of the -nostdinc

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Fix typo introduced with commit 9e6ee5e

[sandbox] export ELF_CLASS for sandbox

[kbuild] move -pipe from architecture Makefiles to toplevel ...

Makefile

[kbuild] remove -Wall from architecture Makefiles. It's already ...

in toplevel CFLAGS

[kbuild] move -nostdinc from architecture Makefiles to toplevel ...

Makefile

[kbuild] move -ffreestanding from architecture Makefiles to toplevel ...

Makefile

[kbuild] move -fno-builtin from architecture Makefiles to toplevel ...

Makefile

[kbuild] move -Os flag from architecture Makefiles to toplevel ...

Makefile

[kbuild] change architecture Makefiles not to overwrite ...

CFLAGS, instead append them to the existing CFLAGS.
	 Also, remove all double CFLAGS

[general] Move include/configs/* to board/*/config.h

add globbing support

remove -isystem with empty argument ...

This patch removes the "-isystem $(gccincdir)" from the
arch/*/Makefile because gccindir is empty.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

[sandbox] add ELF_{ARCH,FORMAT} for powerpc ...

This patch adds the needed ELF_{ARCH,FORMAT} for the sandbox on powerpc

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

don't against link libgcc ...

We don't want to link against libgcc.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Revert "add linker script for sandbox" ...

This reverts commit 175e843.