Hi,
On Fri, 5 Nov 2021 at 09:51, François Ozog wrote:
>
> Hi,
>
> On Wed, 3 Nov 2021 at 14:17, François Ozog wrote:
>>
>> Hi,
>>
>> Thanks Alex to patch me in.
>>
>> I'd like to present another perspective on the motivation as I can't really
>> comment on the actual "how".
>>
>> On real Arm
Hi,
On Wed, 3 Nov 2021 at 14:17, François Ozog wrote:
> Hi,
>
> Thanks Alex to patch me in.
>
> I'd like to present another perspective on the motivation as I can't
> really comment on the actual "how".
>
> On real Arm boards, firmware is often assembled into a FIP.
> That FIP can contain quite
Hi,
Thanks Alex to patch me in.
I'd like to present another perspective on the motivation as I can't really
comment on the actual "how".
On real Arm boards, firmware is often assembled into a FIP.
That FIP can contain quite a good deal of things, including an
NT_FW_CONFIG,
Peter Maydell writes:
> On Mon, 27 Sept 2021 at 16:18, Simon Glass wrote:
>> On Mon, 27 Sept 2021 at 02:48, Peter Maydell
>> wrote:
>> > So what is missing in the QEMU-provided DTB that it needs?
>>
>> Quite a lot. Here are some examples:
>>
>> U-Boot has limited pre-relocation memory so
On Wed, Sep 29, 2021 at 09:09:59AM -0600, Simon Glass wrote:
> Hi Peter,
>
> On Wed, 29 Sept 2021 at 03:10, Peter Maydell wrote:
> >
> > On Wed, 29 Sept 2021 at 04:01, Simon Glass wrote:
> > > On Tue, 28 Sept 2021 at 03:21, Peter Maydell
> > > wrote:
> > > > So what *is* this patch doing? The
Hi Peter,
On Wed, 29 Sept 2021 at 03:10, Peter Maydell wrote:
>
> On Wed, 29 Sept 2021 at 04:01, Simon Glass wrote:
> > On Tue, 28 Sept 2021 at 03:21, Peter Maydell
> > wrote:
> > > So what *is* this patch doing? The subject says "Allow additions to
> > > the generated device tree", and the
On Wed, 29 Sept 2021 at 04:01, Simon Glass wrote:
> On Tue, 28 Sept 2021 at 03:21, Peter Maydell wrote:
> > So what *is* this patch doing? The subject says "Allow additions to
> > the generated device tree", and the patch adds an option to
> > "Merge a device tree binary (dtb) file into the
Hi Peter,
On Tue, 28 Sept 2021 at 03:21, Peter Maydell wrote:
>
> On Mon, 27 Sept 2021 at 21:12, Simon Glass wrote:
> > I think you are misunderstanding my patch and that may be the problem here.
> >
> > Where QEMU is provided with a dtb (-dtb) it uses that and passes it
> > on. This is
On Mon, 27 Sept 2021 at 21:12, Simon Glass wrote:
> I think you are misunderstanding my patch and that may be the problem here.
>
> Where QEMU is provided with a dtb (-dtb) it uses that and passes it
> on. This is absolutely fine and I have tested that this works well
> with U-Boot. No issues.
>
Hi Peter,
On Mon, 27 Sept 2021 at 10:50, Peter Maydell wrote:
>
> On Mon, 27 Sept 2021 at 17:04, Simon Glass wrote:
> > On Mon, 27 Sept 2021 at 09:46, Peter Maydell
> > wrote:
>
> > > My take is that this is u-boot doing weird custom things with
> > > the DTB that aren't "describe the
On Mon, 27 Sept 2021 at 17:04, Simon Glass wrote:
> On Mon, 27 Sept 2021 at 09:46, Peter Maydell wrote:
> > My take is that this is u-boot doing weird custom things with
> > the DTB that aren't "describe the hardware". You should be able
> > to boot u-boot by putting those custom DTB extra
Hi Peter,
On Mon, 27 Sept 2021 at 09:46, Peter Maydell wrote:
>
> On Mon, 27 Sept 2021 at 16:18, Simon Glass wrote:
> > On Mon, 27 Sept 2021 at 02:48, Peter Maydell
> > wrote:
> > > So what is missing in the QEMU-provided DTB that it needs?
> >
> > Quite a lot. Here are some examples:
> >
> >
On Mon, 27 Sept 2021 at 16:18, Simon Glass wrote:
> On Mon, 27 Sept 2021 at 02:48, Peter Maydell wrote:
> > So what is missing in the QEMU-provided DTB that it needs?
>
> Quite a lot. Here are some examples:
>
> U-Boot has limited pre-relocation memory so tries to avoid
> binding/probing devices
Hi Peter,
On Mon, 27 Sept 2021 at 02:48, Peter Maydell wrote:
>
> On Sun, 26 Sept 2021 at 19:55, Simon Glass wrote:
> > In the case of U-Boot at least, it uses the devicetree for
> > configuration (it is a boot loader, so there is no user space to
> > provide configuration). So the current
On Sun, 26 Sept 2021 at 19:55, Simon Glass wrote:
> In the case of U-Boot at least, it uses the devicetree for
> configuration (it is a boot loader, so there is no user space to
> provide configuration). So the current setup is not sufficient to boot
> it correctly in all cases. On the other
Hi Peter,
On Sun, 26 Sept 2021 at 12:47, Peter Maydell wrote:
>
> On Sun, 26 Sept 2021 at 19:34, Simon Glass wrote:
> >
> > At present qemu creates a device tree automatically with the 'virt' generic
> > virtual platform. This is very convenient in most cases but there is not
> > much control
On Sun, 26 Sept 2021 at 19:34, Simon Glass wrote:
>
> At present qemu creates a device tree automatically with the 'virt' generic
> virtual platform. This is very convenient in most cases but there is not
> much control over what is generated.
>
> Add a way to provide a device tree binary file
At present qemu creates a device tree automatically with the 'virt' generic
virtual platform. This is very convenient in most cases but there is not
much control over what is generated.
Add a way to provide a device tree binary file with additional properties
to add before booting. This provides
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