[U-Boot] Using qemu-system-ppc to boot U-Boot

[Scott Wood]

On 03/27/2012 04:55 PM, Tom Rini wrote:
> On Tue, Mar 27, 2012 at 03:59:48PM -0500, Scott Wood wrote:
>> On 03/27/2012 03:53 PM, Wolfgang Denk wrote:
>>> Dear Frank,
>>>
>>> In message <CADNf2sxrQFDU0LLQWp5huRGgQiKbaLik1+2C=Oj=gjORP6XacA at mail.gmail.com> you wrote:
>>>>
>>>> I'm trying to figure out if anyone has ported a PPC system to QEMU
>>>> that is capable of booting U-Boot. Similar to the ARM versatilepb
>>>> target, but for PPC instead. I've tried the Bamboo and MPC8544DS but
>>>> it seems they only use stubs to OS calls and parses a DTB for info.
>>>
>>> Did you check which configurations the Yocto project are using?  They
>>> provide qemu based emulations for ARM, MIPS, PPC and x86, and I would
>>> be really surprised if the ARM and PPC configs were not based on
>>> U-Boot ...  [ARM: beagleboard; PPC: mpc8315e-rdb; MIPS:
>>> routerstationpro]
>>
>> I'm not familiar with what Yocto does, but at least for Freescale PPC
>> chips QEMU does not emulate enough of the hardware to run U-Boot (at
>> least, not without significant U-Boot hacking that I'm not aware of
>> anyone having done).  QEMU loads Linux directly.
> 
> Putting my OE-guy hat on, the qemu-ppc target used is 'mac99'.  It was
> switched over from prep back in January of this year.  From my own past
> diggings, there's not really a newer machine option as all of the
> support added to qemu from Freescale and IBM has been kvm-oriented
> rather than full machine emulation oriented.

The mpc8544ds target does support emulation now (but not enough for U-Boot).

-Scott