linux-kernel - Re: [PATCH] ARM: tegra20: Store CPU "resettable" status in IRAM

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Date:	Mon, 19 Jan 2015 21:00:06 +0300
From:	Dmitry Osipenko <digetx@...il.com>
To:	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>
CC:	Alexandre Courbot <gnurou@...il.com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] ARM: tegra20: Store CPU "resettable" status in IRAM

19.01.2015 20:45, Stephen Warren пишет:
> On 01/19/2015 10:41 AM, Dmitry Osipenko wrote:
>> 19.01.2015 20:26, Stephen Warren пишет:
>>> Hopefully this works out. I suppose it's unlikely anyone will be
>>> running code on
>>> the AVP upstrem, so any potential conflict with AVP's usage of IRAM
>>> isn't likely
>>> to occur.
>>>
>> I don't see how it can conflict with AVP code. First KB of IRAM is
>> reserved for reset handler. Am I missing something?
>>
>>  From reset.h:
>>
>> /* The first 1K of IRAM is permanently reserved for the CPU reset
>> handler */
>
> I believe "CPU" in that context means AVP CPU. Still, I may not be correct, and
> to be honest it's likely not too well defined even if that comment seems clear-cut.
>
Hmm... Suddenly I recalled that LP2 was always disabled in downstream kernel. I 
remember that I tried it once (couple years ago) and it didn't work, however I 
presume it was just broken. Now I don't feel good with it.

-- 
Dmitry
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