Re: [Qemu-devel] [6271] Use ESCC for PowerMac serial

[Aurelien Jarno]

On Tue, Jan 13, 2009 at 09:46:09PM +0100, Laurent Vivier wrote:
>
> Le 13 janv. 09 à 18:03, Aurelien Jarno a écrit :
>
>> On Mon, Jan 12, 2009 at 10:59:11PM +0200, Blue Swirl wrote:
>>> On 1/12/09, Aurelien Jarno <address@hidden> wrote:
>>>> On Mon, Jan 12, 2009 at 09:40:49PM +0100, Aurelien Jarno wrote:
>>>>> On Mon, Jan 12, 2009 at 10:32:43PM +0200, Blue Swirl wrote:
>>>>>> On 1/12/09, Aurelien Jarno <address@hidden> wrote:
>>>>>>> On Mon, Jan 12, 2009 at 05:40:24PM +0000, Blue Swirl wrote:
>>>>>>
>>>>
>>>>>> Strange, at least Debian 3.1 R8 (CD and direct -kernel), Debian 
>>>>>> 4.0 R5
>>>>>> (CD and direct -kernel), Debian 4.0 R6 and Gentoo 2008.0 act like
>>>>>> before.
>>>>>
>>>>> I have the same problem with a CDROM, an hard disk, -kernel.
>>>>>
>>>>>> What kind of setup do you have? At least OpenBIOS config is not
>>>>>> standard, you have enabled PCI debugging.
>>>>>
>>>>> I have built OpenBIOS by hand, native build. This is the  
>>>>> unmodified SVN.
>>>>>
>>>>
>>>>
>>>> The PCI debugging is enabled by default on the native build, and  
>>>> disable
>>>> on the cross-build. Disabling the PCI code fixes (or workarounds?)  
>>>> the
>>>> problem.
>>>
>>> It looks like the address of the boot serial is bad, if I change it  
>>> to
>>> 0x7f013000, PCI debug output works. Maybe something maps over the
>>> address at some point.
>>
>> 0x80013000 is in the middle of the PCI space, so you are hitting  
>> another
>> device, probably the VGA card. 0x7f013000 is unused but we have to  
>> limit
>> the memory to 2032MiB
>
>
> Maximum ram size of G3/beige is 768 MB:
>
> http://apple-history.com/?page=gallery&model=g3
>

Agreed, but a Linux kernel works perfectly with up to 2037MB(*) on the
emulated version of the machine. I don't think it is really useful to
limit the size of the memory to 768MB in QEMU.

Aurelien

(*) The PCI bus is mapped at 0x80000000. At the end of the RAM we load
the video bios (video.x). BTW, I don't know if Mac OS uses that but
Linux doesn't use it.

-- 
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