On Thu, Apr 2, 2020 at 2:42 PM Michael Ellerman
> "Alastair D'Silva" <alastair(a)d-silva.org> writes:
> >> -----Original Message-----
> >> From: Dan Williams <dan.j.williams(a)intel.com>
> >> On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva
> >> wrote:
> >> >
> >> > *snip*
> >> Are OPAL calls similar to ACPI DSMs? I.e. methods for the OS to invoke
> >> platform firmware services? What's Skiboot?
> > Yes, OPAL is the interface to firmware for POWER. Skiboot is the open-source
(and only) implementation of OPAL.
> In particular the tokens for calls are defined here:
> And you can grep for the token to find the implementation:
I'm not sure I'd encourage anyone to read npu2-opencapi.c. I find it
hard enough to follow even with access to the workbooks.
Compared to certain firmwares that run on certain other platforms it's
actually pretty readable code ;)