Re: [Qemu-devel] [PATCH 0/6] [RFC] New SPARC machine: Leon3

[Fabien Chouteau]

On 12/06/2010 11:44 AM, Artyom Tarasenko wrote:
> On Mon, Dec 6, 2010 at 10:26 AM, Fabien Chouteau<address@hidden>  wrote:
> > Hi everyone,
> > I'm glad to submit my first patches to the Qemu-devel list.
> >
> > This patch set introduces a new SPARC V8 machine: Leon3. It's an open-source
> > VHDL System-On-Chip, well known in space industry (more information on
> > http://www.gaisler.com).
> Nice! Haven't looked into the code yet, but it's great to have someone
> who cares for V8.

And if this patch is accepted, we will try to submit more machines like 
erc32 and leon2.

> Do you also have a firmware which runs on these machines?

I can give you a binary running some basic tests.

> > Leon3 is made of multiple components available in the GrLib VHDL library.
> > Three devices are implemented: uart, timers and IRQ manager.
> > You can find code for these peripherals in the grlib_* files.
> >
> > Modifications have been done to the SPARC cpu emulation code to handle
> > Leon3's specific behavior:
> >   - IRQ management
> >   - Cache control
> >   - Asr17 (implementation-dependent Ancillary State Registers)
> Is it the only implementation-dependent asr in Leon3? Thought there were more.

Yes, there's also asr19 for power-down, asr16 for FPU control and others 
for hardware breakpoints.
These are not required for this first implementation, but If there's a 
need for more ASRs, we may have to find a generic implementation to 
handle those registers.

Regards,

--
Fabien Chouteau