On Tue, Aug 6, 2024 at 7:06 AM Alex Bennée <alex.ben...@linaro.org> wrote:
>
> Octavian Purdila <ta...@google.com> writes:
>
> > Picked from:
> >
> > https://github.com/nxp-mcuxpresso/mcux-soc-svd/blob/main/MIMXRT595S/MIMXRT595S_cm33.xml
> >
> > NOTE: the file is truncated to keep the email size reasonable. Please
> > use the link above and download the full file if you want to try out
> > the patch.
> >
> > Signed-off-by: Octavian Purdila <ta...@google.com>
> > ---
> >  hw/arm/svd/MIMXRT595S_cm33.xml | 224052
> > ++++++++++++++++++++++++++++++
>
> I guess one thing we need to decide is if the source XML should live in
> the repository as the preferred method of making changes or just the
> translations generated by the tool.
>

I think we might want to store the XML in the qemu repo, even if we
don't use it to generate the header files at compile time. This avoids
issues with the original XML moving, going away, changed in
incompatible ways, etc.

As for generating the headers at compile time, I don't have a strong
preference. I like it because there is slightly less work to do and it
avoids dealing with resolving changes on both the SVD and the
generated headers. For example, the initial headers are committed,
then some changes are done directly to the headers and then we want to
pick up a new SVD from the vendor to support a new hardware revision.

There are disadvantages as well: pysvd dependency for building qemu,
hard to review if the vendor dumps a new version with lots of changes
and we want to update to it for a new hardware revision, slight
increase in build time.

> >  1 file changed, 224052 insertions(+)
> >  create mode 100644 hw/arm/svd/MIMXRT595S_cm33.xml
> >
> > diff --git a/hw/arm/svd/MIMXRT595S_cm33.xml b/hw/arm/svd/MIMXRT595S_cm33.xml
> > new file mode 100644
> > index 0000000000..8943aa3555
> > --- /dev/null
> > +++ b/hw/arm/svd/MIMXRT595S_cm33.xml
> > @@ -0,0 +1,1725 @@
> > +<?xml version="1.0" encoding="UTF-8"?>
> > +<device schemaVersion="1.3" 
> > xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"; 
> > xs:noNamespaceSchemaLocation="CMSIS-SVD.xsd">
> > +  <vendor>nxp.com</vendor>
> > +  <name>MIMXRT595S_cm33</name>
> > +  <version>1.0</version>
> > +  <description>MIMXRT595SFAWC,MIMXRT595SFFOC</description>
> > +  <licenseText>
> > +Copyright 2016-2023 NXP
> > +SPDX-License-Identifier: BSD-3-Clause
> > +  </licenseText>
>
> This certainly seems compatible. XML is not the medium I personally
> would have chosen as a register specification language but I guess there
> are no other alternatives?
>

I agree that the choice of XML is unfortunate but I am not aware of
alternatives, this is what vendors will provide.

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