MTD, generic physmap memory, MTD_BLOCK

[Nicolas Pitre]

On Wed, 13 Dec 2000, Michael Stumpf wrote:

>
> I'm working in embedded LinuxPPC on a system with low RAM and ROM -- 6 meg RAM,
> 8 meg flash ROM.  It seems like that MTD may provide (or almost so) a method
> for mapping memory space in as a block device.  It already appears to sort-of
> do that, but I was wondering if full support for booting off of non-CFI
> compliant, but transparently mapped in, memories is either in place now
> (doesn't seem to be there) or is planned for the future.

Look at mtdram.c.  It might require verylittle modifications to do just what
you want.

> It's a trivial driver, and I'll write it / modify existing MTD code if
> desired/needed, but it really seems important to have so that I can
> execute-in-place from a cramfs partition in ROM (and also have this as my root
> partition).

It's impossible to execute_in_place from a cramfs partition since the
in-place code is compressed.


Nicolas



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