Question on ARM Cortex R4 support in Linux

[shiraz hashim]

Hi,

We plan to use Linux on our Cortex R4 based SoC.
Can we use the latest Linux straight away or do we
require to add some support for it.

I went through www.linux-arm.org/LinuxKernel/LinuxM3
which describes Cortex M3 support in Linux but was not
able to find any information on M4.

Has anybody used it on Cortex R4 based platform ?

-- 
regards
Shiraz Hashim