Question on ARM Cortex R4 support in Linux

[Catalin Marinas]

On 20 February 2012 10:26, Armando Visconti <armando.visconti at st.com> wrote:
> On 02/20/2012 11:01 AM, Catalin Marinas wrote:
>> On Mon, Feb 20, 2012 at 09:52:55AM +0000, Armando Visconti wrote:
>>>>>>> Has anybody used it on Cortex R4 based platform ?
>>>>>>
>>>>>> In theory Linux support for R4 should just work (once CONFIG_MMU is
>>>>>> disabled). I used to test it in the past regularly but not recently.
>>>>>
>>>>> Great. I was planning to use linux-3.2, I hope the support is there ?
>>>>
>>>> It's been there for years, but some bit-rotting may have occurred.
>>>
>>> I'm assuming you have tried it on a FPGA solution, is that correct?
>>
>> It may have been a real silicon (core tile for a RealView EB board), I
>> don't remember the details.
>>
>
> OK, I see.
>
>
>

>>> We are planning to buy a Cortex-R4 board from ARM.
>>> Lionel Belnet suggested to buy Versatile + a CoreTile with Cortex-R4F
>>> r1p2 Test Chip on it.
>>>
>>> Is there any Linux/ucLinux support already offered for this solution?
>>
>>
>> On www.arm.com/linux there is a uClinux tab with images for download,
>> though the kernel is 2.6.35. Anyway, you can always get a newer kernel
>> and just disable CONFIG_MMU for a RealView/EB board with ARMv6
>> processor.
>
> So, you are suggesting that we can got for a RealView + CoreTile with
> Cortex-R4F testchip instead of versatile?

I looked at the www.arm.com boards page and marketing now calls the
RealView EB (Emulation Baseboard) a Versatile board. I lost track of
the naming :). But yes, Versatile + R4 tile is the same as the one I
tested. In Linux just make sure that you configure it as RealView EB.

-- 
Catalin