Successful Hello world from RPi4B AArch64 over serial

[Alan Cudmore]

Great progress Noor!
I will try your branch today.
Alan

On Mon, Sep 19, 2022 at 12:15 PM Joel Sherrill <joel at rtems.org> wrote:

>
>
> On Mon, Sep 19, 2022 at 10:11 AM Noor Aman <nooraman5718 at gmail.com> wrote:
>
>> Hey everyone,
>> I've managed to get RTEMS6 on the Raspberry pi 4B rev 1.4. Every test ran
>> fine except for minimum.exe, It gave a fatal error.
>>
>
> Congratulations! Hoozah!
>
> minimum.exe is supposed to reflect the smallest application you can have.
> It barely qualifies as an application as the Initialization task exits
> from the
> thread body and that's what triggers the fatal error. It is expected so
> that's a
> pass. Unfortunately, the exception frame you posted to Discord has what
> looks like a mistake in printing the idle thread id (see name on next
> line):
>
> *** FATAL ***
> fatal source: 0 (INTERNAL_ERROR_CORE)
> fatal code: 5 (INTERNAL_ERROR_THREAD_EXITTED)
> RTEMS version: 6.0.0.ee92899632c823e19aa4f2e7048af3d910f59be2
> RTEMS tools: 12.1.1 20220622 (RTEMS 6, RSB
> eea379370116628dbe91f19e61ad6129aa1951ac, Newlib ea99f21)
> executing thread ID: 0x089010001                   <====
> executing thread name: IDLE
>
>
> Kinsey can you run this on one of the aarch64 bit targets you have?
> I suspect this is not a Pi specific issue but maybe something in
> printk? Or the printf format specifier used.  Once more is known, this
> likely will need a ticket.
>
> Try the fileio, cdtest, nsecs, and paranoia samples next. If those
> look ok, it is highly likely that most of the single processor tests
> will run.
>
> fileio requires working console input.
>
>
>>
>> Here's my setup for running RTEMS6 on RPi4B:
>>
>> TF-A is required to enable GIC on RPi. I had tried to use armstub-gic.S (
>> https://github.com/raspberrypi/tools/blob/master/armstubs/armstub8.S)
>> but it didn't work out. TF-A on other hand did work pretty well.
>>
>> Steps to get TF-A binary are described here:
>> https://trustedfirmware-a.readthedocs.io/en/latest/plat/rpi4.html
>>
>
>
>>
>> Config.txt section:
>> arm_64bit=1
>> enable_uart=1
>> gpio=22-27=np
>> enable_jtag_gpio=1
>> dtoverlay=disable-bt
>> kernel=kernel8.img
>> enable_gic=1
>> armstub=bl31.bin
>>
>> RTEMS6
>> My branch (noov-dev): https://github.com/0xnoor/rtems/tree/noor-dev
>>
>
> Now work to get this all cleaned up, merged, and documented. Kinsey
> now has a Pi4 ready to double check your work is repeatable from
> rtems.org sources.
>
> --joel
>
>>
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>> devel mailing list
>> devel at rtems.org
>> http://lists.rtems.org/mailman/listinfo/devel
>
>
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