Re: [Buildroot] [PATCH v6 1/2] package/versal-firmware: new package

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello Neal,

On Fri, 25 Nov 2022 11:18:43 +0000
"Frager, Neal" <neal.frager@amd.com> wrote:

> Yes, it is the full source code, just like there is the full source
> code for the zynqmp pmufw.  The problem is that all 3 of these
> applications are running on a microblaze.
> 
> So to build them, we need to be able to work with two compilers.  A
> microblaze compiler for all the firmware applications and an ARM
> compiler for the rest.
> 
> Normally, it would be much better if we could build the pmufw for
> zynqmp and the plm and psmfw applications for versal.  We have
> discussed this before, but do you have any new ideas for how we could
> configure buildroot to download and build two compilers for two
> different architectures?

Sure: we are already doing that for some ARM64 platforms that need to
build ARM32 firmware: this needs a different compiler.

It is for this reason that we have the package/arm-gnu-toolchain/
package, which downloads and installs a pre-compiled bare-metal ARM32
toolchain. Then this toolchain is for example used by
boot/arm-trusted-firmware/ in some situations:

ifeq ($(BR2_TARGET_ARM_TRUSTED_FIRMWARE_NEEDS_ARM32_TOOLCHAIN),y)
ARM_TRUSTED_FIRMWARE_DEPENDENCIES += host-arm-gnu-toolchain
endif

So if you have a Microblaze bare metal toolchain available somewhere,
we could create a package for it, and build the firmware from source.

Best regards,

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot