changes for reducing DDR size

Sascha Hauer s.hauer at
Mon Aug 16 05:13:30 EDT 2010


On Fri, Aug 13, 2010 at 08:47:38PM +0530, kuldeep ghan wrote:
> Hi,
>         I am using PCM038 based custom board with changes in Memory
> configuration. I want to know what all changes i have to do in barebox
> source if I am reducing the size of DDR to 64 MB.
> I have two 32MB DDR chips interfaced on CSD0 and CSD1. I am able to boot the
> board with changes in pcm038 and lowlevel_init.S. I see that both the DDRs
> are initialized properly and able to write and read to DDR address space.
>          Ping to command is failing with these changes.  And I am not sure
> about the changes required for stack size and malloc size.

You have to adjust the TEXT_BASE in arch/arm/mach-imx/Kconfig so that the
resulting link address is is your address space. This should be
sufficient for barebox. For Linux you have to adjust the device size of
the device which is passed to armlinux_add_dram() to 64MB.

I hope this helps


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