[meta-xilinx] AMP using Yocto meta-xilinx

[Nathan Rossi]

> -----Original Message-----
> From: meta-xilinx-bounces at yoctoproject.org [mailto:meta-xilinx-
> bounces at yoctoproject.org] On Behalf Of Edward Wingate
> Sent: Friday, January 23, 2015 9:54 AM
> To: meta-xilinx at yoctoproject.org
> Subject: Re: [meta-xilinx] AMP using Yocto meta-xilinx
> 
> I created a fragment that configures the linux-xlnx kernel to allow AMP:
> CONFIG_HIGHMEM=y
> CONFIG_VMSPLIT_2G=y
> CONFIG_ZYNQ_REMOTEPROC=m
> CONFIG_RPMSG_OMX=m
> CONFIG_RPMSG_FREERTOS_STAT=m
> (These kernel config settings are based on the ug978 AMP guide.)
> 
> The bitbake command succeeded and after booting the new kernel, I
> attempted to release the 2nd CPU from Linux with:
> modprobe zynq_remoteproc
> 
> But this resulted in:
> modprobe: module zynq_remoteproc not found in modules.dep
> 
> And when I looked at /lib/modules/3.14.2-xilinx/modules.dep, the file
> is empty (zero length) and there are no modules in the directory
> either.  I would think at least some modules would be present in the
> distribution, if not the one I want.
> 
> In log.do_install for linux-xlnx, I do see the following (among many
> others):
> INSTALL drivers/remoteproc/zynq_remoteproc.ko
> 
> And I do see the module in the poky build image directory:
> ./poky/build/tmp/work/<architecture>/linux-xlnx/3.14-
> xilinx+git2b48a8aeea7367359f9eebe55c4a09a05227f32b-
> r0/image/lib/modules/3.14.2-
> xilinx/kernel/drivers/remoteproc/zynq_remoteproc.ko
> 
> And zynq_remoteproc.ko is listed in
> ./poky/build/tmp/work/<architecture>/linux-xlnx/3.14-
> xilinx+git2b48a8aeea7367359f9eebe55c4a09a05227f32b-
> r0/image/lib/modules/3.14.2-xilinx/modules.order
> as well.
> 
> Why didn't the module make it to the image?  I didn't see any obvious
> errors in the log.do_deploy or log.do_package either.  Is there
> another log I can check?

You will need to add the module(s) package to the image. E.g. "kernel-module-zynq-remoteproc" (not sure if that's the exact name, check for the package in deploy/).

Adding it to MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS (or *_RDEPENDS as a hard dependency).
(http://www.yoctoproject.org/docs/current/ref-manual/ref-manual.html#var-MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS)

MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS += "kernel-module-zynq-remoteproc"

Regards,
Nathan

> 
> Thanks,
> Edward
> 
> 
> On Tue, Nov 25, 2014 at 10:03 AM, Joe MacDonald
> <Joe_MacDonald at mentor.com> wrote:
> > [Re: [meta-xilinx] AMP using Yocto meta-xilinx] On 14.11.25 (Tue 09:50)
> Edward Wingate wrote:
> >
> >> What is the difference between "virtual/kernel" and "linux-xlnx"?
> >> Will they both build/make the same kernel?
> >
> > Sometimes.  :-)
> >
> > The information you're probably needing is right here:
> >
> > http://www.yoctoproject.org/docs/1.7/bitbake-user-manual/bitbake-user-
> manual.html#bb-bitbake-providers
> >
> > -J.
> >
> >>
> >> Thanks,
> >> Edward
> >>
> >>
> >> On Sat, Nov 22, 2014 at 11:31 AM, Mike Looijmans
> >> <mike.looijmans at topic.nl> wrote:
> >> > On 11/21/2014 07:58 PM, Elvis Dowson wrote:
> >> >>
> >> >> Hi Edward,
> >> >>
> >> >> Type the following command to clean and reconfigure the kernel:
> >> >>
> >> >> bitbake linux-xilinx -c clean -f
> >> >> bitbake linux-xilinx -c configure -f
> >> >> bitbake linux-xilinx -c menuconfig -f
> >> >> bitbake linux-xilinx -c compile -f
> >> >> bitbake linux-xilinx -c deploy -f
> >> >
> >> >
> >> > Use:
> >> >
> >> > bitbake virtual/kernel -c menuconfig
> >> >
> >> > Then from the menuconfig, save the configuration file to where your
> bitbake
> >> > recipe will pick it up. Otherwise, your changes will be lost the next
> run of
> >> > the kernel.
> >> >
> >> > And bitbake is smart enough to figure out the dependencies, so just
> running:
> >> >
> >> > bitbake virtual/kernel
> >> >
> >> > will install and deploy the new kernel after you've changed the
> >> > configuration. All those "-f" (force) options aren't needed, and you
> also
> >> > don't need to specify all the single steps. You can add a "-c deploy"
> if you
> >> > like.
> >> >
> >> >
> >> >
> >> > --
> >> > Mike Looijmans
> >> > --
> >> > _______________________________________________
> >> > meta-xilinx mailing list
> >> > meta-xilinx at yoctoproject.org
> >> > https://lists.yoctoproject.org/listinfo/meta-xilinx
> > --
> > -Joe MacDonald.
> > :wq
> --
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