[meta-xilinx] What kernel for MPSoC?

[Nathan Rossi]

On Fri, Jul 22, 2016 at 11:44 PM, Mike Looijmans
<mike.looijmans at topic.nl> wrote:
>
> On 22-07-16 15:31, Nathan Rossi wrote:
> > On Fri, Jul 22, 2016 at 3:25 PM, Mike Looijmans <mike.looijmans at topic.nl> wrote:
> >>
> >> If I modify the devicetree and disable the 'psci' part, the system boots fine
> >> but doesn't wake the other three cores.
> >
> > By default ZynqMP machines are setup to use PSCI for cpu bringup (QEMU
> > has a PSCI implementation in-built), which means you will have to load
> > some firmware before the kernel to handle PSCI calls, etc. ARM Trusted
> > Firmware is what Xilinx recommends and they provide support for.
> >
> > The u-boot post regarding SPL
> > (http://lists.denx.de/pipermail/u-boot/2016-May/254902.html) has info
> > for booting atf. By default meta-xilinx will build an ATF binary for
> > ZynqMP targets.
>
>
> Please explain, it seems to build a package "arm-trusted-firmware" but it
> doesn't seem to make its way into the image or deployment area?

It deploys (or it at least should deploy) the
"bl31-<machine>.bin"/"bl31-<machine>.elf" binaries. This is a piece of
ATF, specifically stage 3 - 1 (the el3 runtime). You can read more
info here https://github.com/ARM-software/arm-trusted-firmware/blob/master/docs/firmware-design.md.

Regards,
Nathan

>
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> Kind regards,
>
>
>
> Mike Looijmans
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