On Tue, Sep 29, 2020 at 5:32 PM Andrew Lunn [off-list ref] wrote:

On Tue, Sep 29, 2020 at 04:55:40PM +0300, Andy Shevchenko wrote:

quoted

On Tue, Sep 29, 2020 at 4:43 PM Andrew Lunn [off-list ref] wrote:

quoted

On Tue, Sep 29, 2020 at 10:47:03AM +0530, Calvin Johnson wrote:

quoted

On Fri, Sep 25, 2020 at 02:34:21PM +0100, Grant Likely wrote:

...

quoted

Newbie ACPI question: Does ACPI even support big endian CPUs, given
its x86 origins?

I understand the newbie part, but can you elaborate what did you mean
under 'support'?
To me it sounds like 'network stack was developed for BE CPUs, does it
support LE ones?'

Does ACPI define the endianness of its tables? Is it written in the
standard that they should be little endian?

5.2:
"All numeric values in ACPI-defined tables, blocks, and structures are
always encoded in little endian
format. Signature values are stored as fixed-length strings."

 Does Tianocore, or any
other implementations, have the needed le32_to_cpu() calls so that
they can boot on a big endian CPU?

Not of my knowledge.

Does it have a standardized way of
saying a device is big endian, swap words around if appropriate when
doing IO?

I guess this is not applicable to ACPI. Does Linux have a standardized way?
So, what did you mean under doing I/O? I mean in which context?

Is it feasible to boot an ARM system big endian?

Not an ARM guy.

Can i boot the same
system little endian? The CPU should be able to do it, but are the
needed things in the ACPI specification and implementation to allow
it?

-- 
With Best Regards,
Andy Shevchenko