From: t.figa@samsung.com (Tomasz Figa)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/5] ARM: EXYNOS: Add support for Exynos secure firmware
Date: Wed, 19 Sep 2012 12:10:35 +0200 [thread overview]
Message-ID: <3910462.8Opr7bJoeX@amdc1227> (raw)
In-Reply-To: <20120916004455.GD7028@quad.lixom.net>
Hi Olof,
On Saturday 15 of September 2012 17:44:55 Olof Johansson wrote:
> On Thu, Sep 13, 2012 at 10:13:37AM +0200, Tomasz Figa wrote:
> > +static void __iomem *exynos_cpu_boot_reg(int cpu)
> > +{
> > + return S5P_VA_SYSRAM_NS + 0x1c + 4*cpu;
> > +}
>
> This communication area in sysram should probably be seen as a part of
> the firmware interface. It should thus be defined as part of the binding
> instead, i.e. through a reg property or similar there. That also would
> make it easy to convert to using ioremap() instead of iodesc tables,
> which always a nice thing.
The problem with SYSRAM_NS is that it might be also used in other code, not
related to firmware only. I don't know exactly all the use cases for it.
Is it really a big problem or we could let it be for now, merge the patches
for firmware and then convert SYSRAM_NS to dynamic mapping when its
situation clarifies?
Best regards,
--
Tomasz Figa
Samsung Poland R&D Center
next prev parent reply other threads:[~2012-09-19 10:10 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-13 8:13 [PATCH 0/5] ARM: EXYNOS: Add secure firmware support Tomasz Figa
2012-09-13 8:13 ` [PATCH 1/5] ARM: EXYNOS: Add IO mapping for non-secure SYSRAM Tomasz Figa
2012-09-13 8:13 ` [PATCH 2/5] ARM: Add interface for registering and calling firmware-specific operations Tomasz Figa
2012-09-13 8:25 ` Tomasz Figa
2012-09-22 5:50 ` Olof Johansson
2012-09-22 6:01 ` Kyungmin Park
2012-09-22 6:23 ` Olof Johansson
2012-09-22 13:17 ` Tomasz Figa
2012-09-22 13:22 ` Russell King - ARM Linux
2012-09-13 8:13 ` [PATCH 3/5] ARM: EXYNOS: Add support for secure monitor calls Tomasz Figa
2012-09-13 8:13 ` [PATCH 4/5] ARM: EXYNOS: Add support for Exynos secure firmware Tomasz Figa
2012-09-16 0:44 ` Olof Johansson
2012-09-19 10:10 ` Tomasz Figa [this message]
2012-09-22 5:39 ` Olof Johansson
2012-09-22 5:57 ` Kyungmin Park
2012-09-22 6:36 ` Olof Johansson
2012-09-22 6:39 ` Kyungmin Park
2012-09-24 14:39 ` Tomasz Figa
2012-09-13 8:13 ` [PATCH 5/5] ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up Tomasz Figa
2012-09-19 13:29 ` [PATCH 0/5] ARM: EXYNOS: Add secure firmware support Tomasz Figa
2012-09-21 8:39 ` Kyungmin Park
2012-09-22 5:52 ` Olof Johansson
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