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

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Message-ID: <54BD42D0.3020107@wwwdotorg.org>
Date:	Mon, 19 Jan 2015 10:45:52 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Dmitry Osipenko <digetx@...il.com>,
	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

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.

>> __tegra20_cpu1_resettable_status_offset has a lot of _ at the start.
>> Should the
>> symbol be named more normally? I guess at least it's consistent with the
>> existing very "underscory" __tegra_cpu_reset_handler_start.
> I also wasn't happy with "underscory" :) And yes, I left it for
> consistency. Please feel free to rename it, if needed.

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