linux-kernel - Re: [PATCH] ARM: move firmware

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Message-ID: <528A64D2.4020107@codeaurora.org>
Date:	Mon, 18 Nov 2013 14:04:50 -0500
From:	Christopher Covington <cov@...eaurora.org>
To:	Catalin Marinas <catalin.marinas@....com>
CC:	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Stephen Warren <swarren@...dia.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	Alex Courbot <acourbot@...dia.com>,
	Olof Johansson <olof@...om.net>,
	Russell King <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: move firmware_ops to drivers/firmware

Hi Catalin,

On 11/18/2013 12:30 PM, Catalin Marinas wrote:
[...]
> You can't run legacy AArch32 code at EL3 and have lower levels in AArch64
> mode (architectural constraint).

What prevents AArch32 code from running at EL3 and then requesting a reset to
AArch64 by writing to the Reset Management Register before sliding down to
lower exception levels?

Thanks,
Christopher

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