Re: OpenMPIC controller emulation in qemu ?

[BALATON Zoltan]

On Thu, 16 May 2024, Mark Cave-Ayland wrote:
> On 16/05/2024 14:51, Andrew Randrianasulu wrote:
>
> >      > and openfirmware starts ....
> >      >
> >      > bash-5.1$ build/qemu-system-ppc -M mac99 -smp 2 -nographic
> >      >
> >      >>> =============================================================
> >      >>> OpenBIOS 1.1 [Mar 7 2023 22:21]
> >      >>> Configuration device id QEMU version 1 machine id 1
> >      >>> CPUs: 2
> >      >>> Memory: 128M
> >      >>> UUID: 00000000-0000-0000-0000-000000000000
> >      >>> CPU type PowerPC,G4
> >      > milliseconds isn't unique.
> >      > Welcome to OpenBIOS v1.1 built on Mar 7 2023 22:21
> >      > Trying hd:,\\:tbxi...
> >      > Trying hd:,\ppc\bootinfo.txt...
> >      > Trying hd:,%BOOT...
> >      > No valid state has been set by load or init-program
> >      >
> >      > 0 >
>
> You can check the device tree in OpenBIOS by using show-devs to see how many 
> CPUs are present, and confirm that the properties are set correctly.
>
> The reason that SMP hasn't been enabled for the Mac machines is mainly 
> because no-one has been inclined to work on it yet ;)
>
> >      >
> >      >
> >      >
> >      > but boooting finnix fails:
> >      >
> >      > bash-5.1$ build/qemu-system-ppc -M mac99 -smp 2 -nographic -cdrom
> >      > ~/finnix-ppc-110.iso -boot d
> >      >
> >      >>> =============================================================
> >      >>> OpenBIOS 1.1 [Mar 7 2023 22:21]
> >      >>> Configuration device id QEMU version 1 machine id 1
> >      >>> CPUs: 2
> >      >>> Memory: 128M
> >      >>> UUID: 00000000-0000-0000-0000-000000000000
> >      >>> CPU type PowerPC,G4
> >      > milliseconds isn't unique.
> >      > Welcome to OpenBIOS v1.1 built on Mar 7 2023 22:21
> >      > Trying cd:,\\:tbxi...
> >      >>> switching to new context:
> >      >
> >      > я:interpret: exception -13 caught
> >
> >     There's a comment in openbios/forth/system/ciface.fs that says it might
> >     not be an error and also a line:
> >
> >     \ ." INTERPRETE: --- " 2dup type
> >
> >     where you could remove the \ to get it print the Forth code that causes
> >     the error. (By the way is INTERPRETE a typo with extra E at the end?)
> >
> >
> >
> > I tried this and get:
> >
> > bash-5.1$ build/qemu-system-ppc -M mac99 -smp 4 -nographic -cdrom 
> > ~/finnix-ppc-110.iso -boot d -bios /dev/shm/openbios-qemu.elf
> >
> >  >> =============================================================
> >  >> OpenBIOS 1.1 [May 16 2024 12:44]
> >  >> Configuration device id QEMU version 1 machine id 1
> >  >> CPUs: 4
> >  >> Memory: 128M
> >  >> UUID: 00000000-0000-0000-0000-000000000000
> >  >> CPU type PowerPC,G4
> > milliseconds isn't unique.
> > Welcome to OpenBIOS v1.1 built on May 16 2024 12:44
> > Trying cd:,\\:tbxi...
> >  >> switching to new context:
> >
> > я:interpret: exception -13 caughte-int nip nip ;

This didn't seem to work. Only remove the \ not the ." or anythnig after 
that (or maybe this debug line has bitrotten?).

> > =====
>
> Try rebuilding OpenBIOS with DEBUG_CIF enabled in libopenbios/client.c which 
> will show the calls being used by the bootloader.

Yes that's what I've used before but forgot where is it. That would give 
more info on other client interface calls too. Also make sure you have -d 
unimp,guest_errors in yout QEMU command as that may give better errors 
when something goes wrong/.

Regards,
BALATON Zoltan