Genode on i.MX6Q Sabre Lite

[Stefan Kalkowski]

Hi,

On 03/22/2017 08:14 AM, Yevgeny Lavrov wrote:
> 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
> <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?

well, if you just want to adjust the code to replace the Wandboard
definitions with your i.MX 6Q Sabre Lite, it is actually that simple.
You only have to change the settings in above mentioned file with in the
17.02 release.

If you want to add support of your board beside of the Wandboard
support, you will have to insert a new layer of board definition. But
being in your position I would first change the current Wandboard
settings to see whether it works in general.

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

It is the very same file. You have to change the value of RAM0_SIZE.

Regards
Stefan

> 
> Thank you
> 
> On Thu, Mar 2, 2017 at 4:53 AM, Stefan Kalkowski
> <stefan.kalkowski at ...1...
> <mailto: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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-- 
Stefan Kalkowski
Genode Labs

https://github.com/skalk · http://genode.org/