[OpenBIOS] [PATCH] ppc: force target CPU

[Mark Cave-Ayland]

On 19/01/16 18:34, Hervé Poussineau wrote:

> Le 19/01/2016 19:05, Andreas Färber a écrit :
>> Am 19.01.2016 um 18:42 schrieb Segher Boessenkool:
>>> On Tue, Jan 19, 2016 at 01:50:13AM +0100, Laurent Vivier wrote:
>>>> According to this series (from Hervé):
>>>>
>>>>      https://lists.gnu.org/archive/html/qemu-ppc/2015-06/msg00110.html
>>>>
>>>> RS/6000 7020/40p is a PReP machine.
>>>>
>>>> And according to this page:
>>>>
>>>>     https://en.wikipedia.org/wiki/RS/6000#Type_7020
>>>>
>>>> RS/6000 7020/40p is PowerPC 601 based.
>>>
>>> 601 doesn't have much to do with 602.  601 is not fully PowerPC; you do
>>> not want to deal with it.
>>
>> I believe Hervé was using a real firmware from IBM FTP for that one, not
>> OpenBIOS.
>>
>> Andreas
>>
> 
> Yes, I was using the real IBM firmware for my tests.
> As IBM 7020 was upgradable to 604, real firmware works with 601 and 604
> types.
> Let's say that QEMU emulates an upgraded 7020, by using a 604 cpu by
> default.
> As a consequence, I see no problem compiling OpenBIOS for a 604 CPU.

Great! If we go with Segher's suggestion for 64-bit then we end up with
this:

32-bit: -mcpu=604
64-bit: -mcpu=970 -mno-altivec

Andreas, does this look reasonable to you?


ATB,

Mark.