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

From: Fabien Chouteau
Subject: Re: [Qemu-devel] [PATCH 0/6] [RFC] New SPARC machine: Leon3
Date: Mon, 06 Dec 2010 16:07:41 +0100
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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
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.


Fabien Chouteau

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