Re: OpenMPIC controller emulation in qemu ?

[Mark Cave-Ayland]

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 ;
>
> =====

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


ATB,

Mark.