Re: [Qemu-devel] ARM Cortex-R4 support ?

[Giancarlo ASNAGHI]

Hi Andreas,

thanks to share the status. I've doubts that some of my collegues may helps 
here, because we are focusing on the uclinux kernel and user side. Anyway I 
check and I let you know.

Best Regards
Giancarlo

> -----Original Message-----
> From: Andreas Färber [mailto:address@hidden
> Sent: venerdì 21 settembre 2012 19:05
> To: Giancarlo ASNAGHI
> Cc: address@hidden; Peter Maydell; Cedric VINCENT
> Subject: Re: [Qemu-devel] ARM Cortex-R4 support ?
> 
> Hello Giancarlo,
> 
> Am 21.09.2012 17:15, schrieb Giancarlo ASNAGHI:
> > Do you know which is the status of the support for Cortex-R4 support? I've
> seen an initial set of patches from Andreas Farber one years ago, but into the
> qemu-system-arm the Cortex-R4 ins't available yet.
> 
> That's true. As a consequence of my patches we redesigned several parts of
> ARM CPU modelling to facilitate this. My patches were not yet rebased onto
> that. A new QOM type derived from TYPE_ARM_CPU would need to be
> created now, to initialize the registers imperatively rather than 
> declaratively.
> I might manage that quickly.
> 
> Note that my published patches only took care of CPUID, FPU and a few
> others to instantiate the -cpu cortex-r4 at all.
> 
> Where I got stuck was reading through the ARMv7 TRM differences between
> VMSA and PMSA (chapters B3 and B4 respectively) to implement PMSA,
> pointed out by Peter. And there were also some floating point width
> differences to ARMv7-A (VFPv3-D16 vs. VFPv3-S32 or so).
> Neither is a small patch that I can supply short-term, maybe your colleagues
> can help with those parts once I've refreshed my patches?
> Cédric has worked on the FPU before, cc'ing.
> 
> Regards,
> Andreas
> 
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