[Qemu-devel] Re: [PATCH] sparc32 fix carry flag handling (Solaris bootblk fix)

[Artyom Tarasenko <atar4qemu@googlemail.com>]

2009/11/13 Blue Swirl <blauwirbel@gmail.com>:
> On Fri, Nov 13, 2009 at 4:28 PM, Artyom Tarasenko
> <atar4qemu@googlemail.com> wrote:
>>>> Could you describe the steps how to boot Solaris with OBP? I'm sure
>>>> there are a lot of people who'd like to test if their favorite Sparc
>>>> Solaris programs work on QEMU.
>>
>> Gathered things for which I currently have hacks here:
>> http://tyom.blogspot.com/2009/11/things-missing-in-vanilla-qemu.html
>>
>> Actually for OBP itself it's just two (SS-5) or three (SS-20) things:
>>
>> - Floppy. Instead of fixing it, I broke it completely, so OBP doesn't
>> try to initialize it and hang. Actually it maybe not the fdc itself,
>> but the irq handling. There are OBP tests which may help to understand
>> what is currently going wrong. I didn't need it, does the fdc actually
>> work under linux/netbsd/OpenBIOS?
>
> Not at least Linux, IIRC Linux floppy driver is broken. FDC is wired a
> bit differently from PC setup. We don't need it, but getting OBP just
> to accept it would be nice.
>
>> - [SparcStation-5] 0x6e000000 AFX. OBP tries to access it and fails
>> with "unassigned address exception". Is only present in the SS-5's
>> TCX. The required address space is just one byte long. IMHO makes no
>> sense to create a special stub device for it. Can we push it into the
>> TCX?
>
> I'd put it to sun4m.c, there is similar device (idreg) already.

Ok, I made one patch for fdc.c (it turned out that for SS5-only fix, a
very small change is needed), and a small afx patch for sun4m.c .
Shall I post them marked "for 0.12" or shall we do it in 0.13 ?

-- 
Regards,
Artyom Tarasenko

solaris/sparc under qemu blog: http://tyom.blogspot.com/