Genode on i.MX6Q Sabre Lite

[Yevgeny Lavrov]

Hi

Thanks for the hint. You're correct about the UART, they are different.
Wand uses UART1 = 0x02020000 while Sabre Lite uses UART2 which is 0x021e800.
I tried Genode 15.02 from the institute of Madras:
https://github.com/iitmadras/genode/tree/hw_sabrelite_tz_support, simple
run/printf for now, and it works. I currently use it as a reference. After
comparing board_base.h files for i.MX6 platform, I noticed that
specifically for Sabre Lite the values in the board_base.h from Madras are
set to:

UART_1_IRQ = 57,
UART_1_MMIO_BASE = 0x021e8000,

while for Wandboard, they are the same as in Genode 17.02.

I don't think that adjusting UART will be as simple as copying these values
over to Genode 17.02 /repos/base/include/spec/imx6/drivers/board_base.h So
if there are any other files involved, would you please tell me what those
files are so I know exactly what to look for?

How would I lower the RAM size for my build, and what files are involved?

Thank you

On Thu, Mar 2, 2017 at 4:53 AM, Stefan Kalkowski <
stefan.kalkowski at ...1...> wrote:

> Hi,
>
> well, just because both boards Wandboard and i.MX 6Q Sabre Lite are
> using the same system-on-chip (SoC) does not mean they are identical. So
> if you are hesitant to start instrumenting the startup code, e.g., via
> additional log() calls, you can at least compare the high level
> description of the boards. One main issue is which memory slots are used
> by which board, and which UART within the SoC is used for the serial
> line connector of the board.
>
> One thing that was striking me first when looking at high-level
> description of the Sabre Lite board is that is has just 1 GB of RAM,
> whereby the Wandboard has 2 GB. This is obviously an issue. When
> lowering the RAM size for your setup you potentially will get one step
> ahead. But if they are using different UARTs you will not see any log
> message anyway. In that case you have to check whether both boards use
> the same UART.
>
> Regards
> Stefan
>
> On 03/01/2017 08:28 PM, Yevgeny Lavrov wrote:
> > Hello
> >
> > Is there anything from Genode that I can try on i.MX6Q Sabre Lite
> > development board? So far I've already attempted *log* image that I've
> > obtained from compiling Genode for i.MX6 based Wandboard. The fastboot
> > option that gets executed after *$ make run/log *resulted in nothing, so
> > I've also tried to copy the created images onto SD Card and run them
> > directly on the board.
> >
> > Steps:
> > Once in u-boot prompt
> >
> > => fatload mmc 0 0x30000000 image.elf
> > reading
> > image.elf
> >
> > 1716880 bytes read in 107 ms (15.3 MiB/s)
> > => bootelf 0x30000000
> > ## Starting application at 0x10001000 ...
> >
> > Then the terminal hangs w/o any output.
> >
> > Same thing happens when executing uImage
> > => fatload mmc 0 0x30000000 uImage
> > reading uImage
> > 594679 bytes read in 48 ms (11.8 MiB/s)
> > => bootm 0x30000000
> >
> > Terminal hangs once it reaches: Starting kernel ...
> >
> > Any suggestions on what's wrong?
> >
> > Thank you
> >
> >
> >
> >
> > ------------------------------------------------------------
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>
> --
> Stefan Kalkowski
> Genode Labs
>
> https://github.com/skalk · http://genode.org/
>
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