linux-kernel - Re: [PATCH 0/2] Embedding Position Independent Executables

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Message-ID: <20160423095057.GA2630@afzalpc>
Date:	Sat, 23 Apr 2016 15:20:57 +0530
From:	Afzal Mohammed <afzal.mohd.ma@...il.com>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Dave Martin <Dave.Martin@....com>,
	Olof Johansson <olof@...om.net>,
	Doug Anderson <dianders@...omium.org>,
	Heiko Stuebner <heiko@...ech.de>, Russ Dill <Russ.Dill@...com>
Subject: Re: [PATCH 0/2] Embedding Position Independent Executables

Hi,

On Sat, Apr 23, 2016 at 12:49:58AM +0200, Alexandre Belloni wrote:

> I think Heiko clarified it but there are actually multiple platforms
> that will benefit from this infrastructure. I can name at least at91,
> rockchip, sunxi and am335x. On am335x, this has been solved by running
> that code on the cortex M3 instead of doing that from Linux but it
> forces to compile and load a firmware on the cortex M3 so it is not
> available for anything else.

afaik on am335x, it has been solved so far by not yet supporting
suspend-resume in mainline ;)

afaiu, am335x suspend-resume has 2 parts, one run in A8 & other in M3.
Saving & restoring RAM config, putting to self refresh in addition to
wfi invocation is handled by A8 code running in OCMC, while M3 cuts A8
clock & does other PM things that can't be done in A8.

Regards
afzal