rtems-boot-image tool: Raspberry Pi

[G. S. Niteesh]

Hii,

This is a follow-up message since this thread has been unnoticed for a
while.

Thank you,
Niteesh

On Fri, Feb 21, 2020 at 8:15 PM G. S. Niteesh <gsnb.gn at gmail.com> wrote:

> Hi,
>
> This is regarding adding RPi support to the boot image generation tool.
>
> The boot process for Raspberry Pi is very unconventional. The GPU starts
> first, initializes RAM, other hardware, loads the bootloaders and then
> starts
> the ARM CPU.
>
> The minimum files that are required to boot an RPi are
> bootcode.bin, startx.elf, fixup.dat, kernel.img, config.txt
> There are also other variants of startx.elf and fixup.dat.
> Please have a look at
> https://www.raspberrypi.org/documentation/configuration/config-txt/boot.md
> for information on the variants.
>
> From what I have tried on my Rpi3 model b v1.2 the minimum files that are
> required are start_x.elf, fixup_x.dat, bootcode.bin, kernel.img, config.txt
> But for this to work, we must add start_x=1 to config.txt because by
> default
> start.elf is loaded.
>
> So, what should be the values for the first and second stages in
> rtems-boot.ini for Rpi?
> And also wouldn't it be nice if we could add a files field, which will
> copy the specified files
> to the image? This would save a lot of typing in case of RPi
>
> Thank you,
> Niteesh.
>
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