Failed to launch barebox from flash memory on i.MX35

[Sascha Hauer]

Hi Peter,

On Mon, Oct 31, 2011 at 06:43:08PM +0100, Peter wrote:
> Hi all,
> I just managed to compile the latest barebox source (http://barebox.org/download/barebox-2011.10.0.tar.bz2 <http://barebox.org/download/>) for the pcm043 board.
> I configured and compiled it:
> $ make pcm043_defconfig
> $ make xconfig # nothing changed there
> $ make
> 
> I used the following CROSS environment settings:
> export PATH="$PATH:/opt/OSELAS.Toolchain-1.99.3/arm-1136jfs-linux-gnueabi/gcc-4.3.2-glibc-2.8-binutils-2.19-kernel-2.6.27-sanitized/bin"
> export ARCH=arm
> export CROSS_COMPILE=arm-1136jfs-linux-gnueabi-
> 
> The make went well without any problems.
> I flashed the barebox.bin at address 0xa000_0000 and rebootet.
> The program then trapped while trying to relocate the code to SDRAM.
> The SDRAM is propperly initialized but the call to memcpy takes adress
> 0x9FFFE000 as source and 0x87F00000 as destination.
> 0x9FFFE000 is definitely not correct, it is 0x2000 below the start of the
> flash memory, obviously the same size as symbol  _stext in the map
> when subtracting the base address.
> 
> Map:
> 00038e50 A _barebox_image_size
> 87f02000 T _stext
> 87f02000 T _text
> 
> The source is in arch/arm/copu/start.c at line 122.
> 
> I am completly stuck. What went wrong?
> Any help will be very much appreciated.

There seems to be a bug in the pcm043_defconfig. It is configured for
internal bootmode, which means that the board has to specify a header
of size 0x2000 before the actual image. The pcm043 does not specify this
header as it uses the external bootmode.
Please disable CONFIG_ARCH_IMX_INTERNAL_BOOT in your config, that should
do it. If it works I'll commit a corresponding patch.

Sascha

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