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Re: C0 config reg for 5k core

To: David Kesselring <dkesselr@mmc.atmel.com>
Subject: Re: C0 config reg for 5k core
From: Mike Uhler <uhler@mips.com>
Date: 11 Aug 2003 13:00:30 -0700
Cc: linux-mips@linux-mips.org
In-reply-to: <Pine.GSO.4.44.0308111556500.4643-100000@ares.mmc.atmel.com>
Organization: MIPS Technologies, Inc.
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <Pine.GSO.4.44.0308111556500.4643-100000@ares.mmc.atmel.com>
Sender: linux-mips-bounce@linux-mips.org
For MIPS32 and MIPS64 processors (the 5K is MIPS64), it is
architecturally defined and required, and the compatibility
verification testing verifies it (and, yes, we do run compatibility
verification testing on our own cores).

/gmu

On Mon, 2003-08-11 at 12:57, David Kesselring wrote:
> Is this reg, supposed to be the same among all processor or does it
> differ?
> 
> On 11 Aug 2003, Mike Uhler wrote:
> 
> > Bit 0 of Config1 is FPU-present.  Bit 4 is "Performance counters
> > present".  I guarantee you that the 5K family implements this
> > pattern.
> >
> > /gmu
> >
> >
> > On Mon, 2003-08-11 at 11:28, David Kesselring wrote:
> > > Has anyone else built linux 2.4 for a 5k or 5kf core? When comparing cpu.h
> > > and the MIPS64 5K Processor Core Family Software Users Manual it doesn't
> > > look to me that the c0-config1 reg is defined the same way. Am I reading
> > > something wrong? For example in the spec FPU flag is bit0 while in cpu.h
> > > it is bit4. Seems pretty basic.
> > >
> > > David Kesselring
> > > Atmel MMC
> > > dkesselr@mmc.atmel.com
> > > 919-462-6587
> > --
> >
> > Michael Uhler, Chief Technology Officer
> > MIPS Technologies, Inc.  Email: uhler@mips.com  Pager:uhler_p@mips.com
> > 1225 Charleston Road     Voice:  (650)567-5025  FAX:   (650)567-5225
> > Mountain View, CA 94043  Mobile: (650)868-6870  Admin: (650)567-5085
> >
> >
> >
> >
> 
> David Kesselring
> Atmel MMC
> dkesselr@mmc.atmel.com
> 919-462-6587
-- 

Michael Uhler, Chief Technology Officer
MIPS Technologies, Inc.  Email: uhler@mips.com  Pager:uhler_p@mips.com
1225 Charleston Road     Voice:  (650)567-5025  FAX:   (650)567-5225
Mountain View, CA 94043  Mobile: (650)868-6870  Admin: (650)567-5085



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