linux-kernel - Re: [PATCH 0/5] Handle non-secure L2C initialization on Exynos4

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Date:	Thu, 12 Jun 2014 14:38:49 +0100
From:	Daniel Drake <drake@...lessm.com>
To:	t.figa@...sung.com
Cc:	Kukjin Kim <kgene.kim@...sung.com>,
	Laura Abbott <lauraa@...eaurora.org>,
	Tony Lindgren <tony@...mide.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-kernel@...r.kernel.org, Tomasz Figa <tomasz.figa@...il.com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Robin Holt <holt@....com>,
	Russell King <linux@....linux.org.uk>,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/5] Handle non-secure L2C initialization on Exynos4

Hi Tomasz,

Thanks for working on this!

I have just tried this, against Linus master
64b2d1fbbfda07765dae3f601862796a61b2c451.
Added patch "ARM: dts: Initial ODROID U2 support" and booted on
ODROID-U2. I believe this board has the security enabled.

Unfortunately, it hangs during early boot. With earlyprintk the last
messages seen are:

L2C: platform modifies aux control register: 0x02070000 -> 0x3e470001
L2C: platform provided aux values permit register corruption.
L2C: DT/platform modifies aux control register: 0x02070000 -> 0x3e470001
L2C-310 enabling early BRESP for Cortex-A9
L2C-310: enabling full line of zeros but not enabled in Cortex-A9
L2C-310 ID prefetch enabled, offset 1 lines
L2C-310 dynamic clock gating enabled, standby mode enabled
L2C-310 cache controller enabled, 16 ways, 1024 kB
L2C-310: CACHE_ID 0x4100c4c8, AUX_CTRL 0x7e470001

I then tried to go back to the earlier patch "ARM: EXYNOS: Add secure
firmware support for l2x0 init" (attached, needed a rebase) but that
one also now hangs at:

L2C: platform modifies aux control register: 0x02070000 -> 0x3e470001

It did work on 3.14 though. Looking at the changelogs, many changes
have been made to l2x0 recently. Can you confirm that you have tested
your patches against a kernel with all of Russell King's recent
changes?

Thanks
Daniel

View attachment "0001-ARM-EXYNOS-Add-secure-firmware-support-for-l2x0-init.txt" of type "text/plain" (2154 bytes)