Re: How to add a new ram region ?

[Franck <vagabon.xyz@gmail.com>]

Hi Randy,

2005/9/24, Randy.Dunlap <rdunlap@xenotime.net>:
> On Fri, 23 Sep 2005 09:49:43 +0200 Franck wrote:
>
> > Hi,
> >
> > I'm working on port of linux 2.6.13. The target is a custom board
> > based on a MIPS cpu. There are several RAMs on this board whose
> > address are not contiguous and don't start to 0 . I currently succeed
> > to make linux detect one of these RAM (the biggest one) but I'd like
> > to make linux able to use the others...I'd like to use the other in a
> > particular way: I would like to be able to allocate memory only on a
> > single RAM when needed in kernel space, and in userspace I would be
> > able to export a RAM disk that uses memory on a single RAM.
> >
> > Could someone tell me how to do that or give me some pointers  ?
>
> You can try the "memmap=" kernel boot options, although I don't
> know if or how well they apply to MIPS.  Some of them apparently
> do apply, according to Documentation/kernel-parameters.txt .
>

I looked at this kernel boot option and it seems that every given RAM
regions cannot be used separetly: once they're registered, I can't
allocate a page for a given region. Is that correct ?

Thanks
--
               Franck