On Thu, 02 Apr 2020 21:06:01 +1100 Michael Ellerman <mpe@xxxxxxxxxxxxxx> wrote: > "Oliver O'Halloran" <oohall@xxxxxxxxx> writes: > > On Thu, Apr 2, 2020 at 2:42 PM Michael Ellerman <mpe@xxxxxxxxxxxxxx> wrote: > >> "Alastair D'Silva" <alastair@xxxxxxxxxxx> writes: > >> >> -----Original Message----- > >> >> From: Dan Williams <dan.j.williams@xxxxxxxxx> > >> >> > >> >> On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva <alastair@xxxxxxxxxxx> > >> >> 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. > >> > >> https://github.com/open-power/skiboot > >> > >> In particular the tokens for calls are defined here: > >> > >> https://github.com/open-power/skiboot/blob/master/include/opal-api.h#L220 > >> > >> And you can grep for the token to find the implementation: > >> > >> https://github.com/open-power/skiboot/blob/master/hw/npu2-opencapi.c#L2328 > > > > 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 ;) > Forth rocks ! ;-) > > There's an OPAL call API reference here: > > http://open-power.github.io/skiboot/doc/opal-api/index.html > > Even better. > > cheers
