Re: [Qemu-devel] Openbios upgrade broke sparc32 linux.

[Rob Landley <rob@landley.net>]

On 06/29/2013 03:29:08 PM, Olivier Danet wrote:
> How embarrassing...
> 
> - QEMU 1.5.1 can boot Debian Etch (kernel 2.6.18), RedHat 4.2 (kernel  
> 2.0.30), NetBSD 6.1 and OpenBSD 5.3.
> 
> - Your image (Linux 3.8) can be started with a TurboSparc CPU :
> qemu -cpu "Fujitsu MB86907".

Yay! That fixes it. Thanks.

> - My SparcStation-5 has a 110MHz MicroSPARC-II and the .attributes  
> (aka .properties) fields are identical
> to OpenBIOS values, except for the mask_rev : I have 0x26, OpenBIOS  
> sets 0x23
> 
> Before the patch, OpenBIOS had an incoherence between the PSR  
> register content and the BIOS defined values.
> In Linux "arch/sparc/mm/srmmu.c:get_srmmu_type(void)", this  
> correspond to "a TurboSparc emulating Swift".
> (Swift is the MS-2).
> 
> TurboSPARC could be the new QEMU default, but, ideally, the MS-II  
> should be preferred
>  as it is compatible with more OSes ( hoping to run NextStep in QEMU  
> one day ...).
> 
> Maybe recent Linux kernels are not compatible with the way QEMU  
> emulates the MS-II...

Or it could require a config tweak to the kernel, or some -mtune a  
compile time. I'm happy enough with a different -cpu for sparc: I just  
want to run the thing to natively compile software under emulation and  
avoid more cross compiling.

Thanks,

Rob