linux-kernel - Re: [PATCH 2/2] remoteproc: add support to handle internal memories

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Message-ID: <CAK=WgbZanJYN7-vXW=wo0H40piauHGQHYPPppcCpc+6VapXmeg@mail.gmail.com>
Date:	Tue, 23 Sep 2014 17:16:29 +0300
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Suman Anna <s-anna@...com>
Cc:	Dave Gerlach <d-gerlach@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	linux-arm <linux-arm-kernel@...ts.infradead.org>,
	Robert Tivy <rtivy@...com>
Subject: Re: [PATCH 2/2] remoteproc: add support to handle internal memories

Hi Suman,

On Mon, Sep 15, 2014 at 10:39 PM, Suman Anna <s-anna@...com> wrote:
> These processors need to use their internal RAM for loading, which is
> not for generic usage by the kernel, so defining a CMA block for this
> memory doesn't make sense.

Ok - so just to make sure I understand, this is physical memory you
want to use, which belongs to the remote processor, and which isn't
mapped normally by the kernel?

> Will it suffice to replace the memcpy() with memcpy_toio()?

Yes, memcpy_toio should be fine (and then you don't need to cast the
cookie returned by ioremap).

Thanks,
Ohad.
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