Re: [PATCH -queue v0 1/6] [loongson] add basic loongson-2f support

[Wu Zhangjin <wuzhangjin@gmail.com>]

Hi,

On Wed, 2009-11-04 at 11:28 +0100, Arnaud Patard wrote:
[...]
> > +
> > +config CPU_LOONGSON2F
> > +   bool "Loongson 2F"
> > +   depends on SYS_HAS_CPU_LOONGSON2F
> > +   select CPU_LOONGSON2
> > +   help
> > +     The Loongson 2F processor implements the MIPS III instruction set
> > +     with many extensions.
> > +
> > +     Loongson2F have built-in DDR2 and PCIX controller. The PCIX controller
> > +     have a similar programming interface with FPGA northbridge used in
> > +     Loongson2E.
> > +
> 
> Small question : Why don't you restrict to 64bit kernels only ? From
> what I remember from some discussions with ST, trying to use a 32-bit
> kernel on 2f is a nice way to get troubles. It would be better imho to
> forbid such a configuration. As a side effect, this will remove all
> 'defined(CONFIG_64BIT)' parts of your #ifdef tests. 
> 

It's hard to make such a decision ;) Perhaps some guys want to play with
the 32bit version.

Regards,
        Wu Zhangjin