From: grant.likely@secretlab.ca (Grant Likely)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 4/4] ARM: Xilinx: Adding Xilinx board support
Date: Mon, 2 May 2011 17:36:04 -0600 [thread overview]
Message-ID: <BANLkTim4PFNbnD2LwZRwNKTQLiuNpGjrBw@mail.gmail.com> (raw)
In-Reply-To: <20110502230118.GE28001@n2100.arm.linux.org.uk>
On Mon, May 2, 2011 at 5:01 PM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> On Mon, May 02, 2011 at 09:50:11PM +0000, johnlinn at comcast.net wrote:
>> Seems easy enough assuming we don't need the SCU early for the core count
>> and can get that from the device tree.
>
> Beware. ?Things may not be that trivial when you start considering some
> of the weirdnesses that some vendors start coming out with.
>
>> Since the SCU and part of the GIC end up in the same 4K page they need to be
>> together (unless I'm thinking about that wrong).
>>
>> SCU 0xF8000000
>> GIC_CPU 0xF8000100
>> GIC_DIS 0xF8001000
>
> It is preferable to use the same mapping, as it ensures that you're not
> going to create incompatible aliases.
>
> But, before we get too bogged down with this, please realise that it is
> possible to setup early mappings from the device tree for things like the
> SCU. ?Maybe not using ioremap(), but I'm sure we can find some way to use
> the iotable_init() stuff to setup some early mappings from DT for this
> stuff.
absolutely.
g.
next prev parent reply other threads:[~2011-05-02 23:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <90477150.2231869.1304372815517.JavaMail.root@sz0140a.emeryville.ca.mail.comcast.net>
2011-05-02 21:50 ` [RFC PATCH 4/4] ARM: Xilinx: Adding Xilinx board support johnlinn at comcast.net
2011-05-02 23:01 ` Russell King - ARM Linux
2011-05-02 23:36 ` Grant Likely [this message]
2011-05-03 7:58 ` Arnd Bergmann
2011-05-03 8:52 ` Russell King - ARM Linux
2011-05-03 10:35 ` Arnd Bergmann
[not found] <1518608384.2203937.1304349657551.JavaMail.root@sz0140a.emeryville.ca.mail.comcast.net>
2011-05-02 21:27 ` johnlinn at comcast.net
2011-05-02 21:36 ` Arnd Bergmann
2011-05-02 5:07 [RFC PATCH 0/4] ARM: Basic Xilinx Support Grant Likely
2011-05-02 5:08 ` [RFC PATCH 4/4] ARM: Xilinx: Adding Xilinx board support Grant Likely
2011-05-02 7:06 ` Michal Simek
2011-05-02 8:39 ` Arnd Bergmann
2011-05-02 13:29 ` Rob Herring
2011-05-02 15:52 ` Arnd Bergmann
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