linux-kernel - Re: [PATCH v2 00/76] Synopsys ARC Linux kernel Port

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Date:	Mon, 21 Jan 2013 11:20:29 +0530
From:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Ralf Baechle <ralf@...ux-mips.org>, <linux-arch@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <arnd@...db.de>
Subject: Re: [PATCH v2 00/76] Synopsys ARC Linux kernel Port

On Sunday 20 January 2013 11:45 AM, H. Peter Anvin wrote:
> On 01/18/2013 04:24 AM, Vineet Gupta wrote:
>> This patchset based off-of 3.8-rc4, adds the Linux kernel port to ARC700
>> processor family (750D and 770D) from Synopsys. I would be greatful for
>> further review and feedback.
> 
> One thing: ARC, as I understand it, is a whole family of architectures, which
> mostly have in common their origin at Synopsys.  

ARC has had a long history - as a startup in 90's. There used to be ARCTanget
Instruction set (and cores A4,A5... based on that) which 10 years ago got
deprecated by current ARCompact ISA (600 / 700 cores). So yes it is a family of
architectures - but all we care about is the ARCompact and 600/700 at Synopsys.

However, I don't think there were sub-architectures or forks which floated around.
The MIPS "ARC" seems to be some sort of firmware standard, but not  related to
ARC: Ralf would you care to shed some light ? I don't know of any ARC arch other
than these.

> Can we make this arch/arc700
> since that is what it is?
> 
>     -hpa
> 

As of now yes, but in near future we may have a new Instruction Set and cores
based on that - so it will be better if we keep a non specific name.

Thx,
-Vineet
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