From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tony Lindgren <tony@atomide.com>
Subject: Re: [PATCH] arm: omap: RX-51: ARM errata 430973 workaround
Date: Thu, 28 Mar 2013 08:53:30 -0700
Message-ID: <20130328155330.GS10155@atomide.com>
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To: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>, Pali =?utf-8?B?Um9ow6Fy?= <pali.rohar@gmail.com>, Nishanth Menon <nm@ti.com>, linux-kernel@vger.kernel.org, =?utf-8?B?0JjQstCw0LnQu9C+INCU0LjQvNC40YLRgNC+0LI=?= <freemangordon@abv.bg>, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
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* Santosh Shilimkar <santosh.shilimkar@ti.com> [130328 03:10]:
> On Thursday 28 March 2013 03:20 PM, Russell King - ARM Linux wrote:
> > On Wed, Mar 27, 2013 at 01:56:07PM -0700, Tony Lindgren wrote:
> >> * Pali Roh=C3=A1r <pali.rohar@gmail.com> [130324 07:31]:
> >>> it is possible to upstream errata 430973 workaround for RX-51?
> >>
> >> I think we should make the SMC handling a generic function for ARM=
=2E
> >>
> >> AFAIK just the SMC call numbering is different for various
> >> implementations. So the handler and passing of the parameters
> >> seems like it should be generic.
> >=20
> > SMC calls vary greatly in how they are handled.  The only thing tha=
t's
> > generic is issuing the SMC call.  All the setup and what arguments =
are
> > required are completely different from SoC to SoC.
> >=20
> > For example, some SoCs require arguments passed via memory.  Others=
 like
> > OMAP its via registers.
>=20
> Exactly. As somebody said on the list, that code looks identical but
> it is not. An SMC with barrier instruction is mostly common and nothi=
ng
> more than that.

Thanks all, case closed then. There's no way to come up with a generic
SMC function.

Regards,

Tony