Q on MTD support for NOR flash

Kevin Kaichuan He hek_u5 at yahoo.com
Sun Nov 10 02:49:20 EST 2002


Thank you very much !

One Further question is : how do I configure MTD driver to support
my NOR flash ? For example, the AMD29LV800 flash has two width: 8bits
or 16bits, how do I let the driver know which width of word I choose ?
Or can the MTD magically figure out the configuration of my NOR 
flash ?



--- Jörn Engel <joern at wohnheim.fh-wedel.de> wrote:
> On Sat, 9 November 2002 12:36:50 -0800, Kevin Kaichuan He wrote:
> > 
> > We are considering to use NOR flash in a embedded linux
> > system. But it seems that NAND flash support was mentioned
> > a lot in MTD instead of NOR flash. I'm wondering if there
> > is intensive NOR flash support in MTD, specifically if
> > AMD's boot sector NOR flash
> >
> > is supported.
> Yupp.
> Nand flash support is not too old and thus is getting a lot more
> development now. Nor, in almost all cases, simply works.
> > Also can we partition the AM29LV800B into multiple partitions and
> > mount different filesystem on it (e.g. JFFS on RW partiton and Cramfs
> > on RO partition) ?
> Yupp.
> > How about the boot sector of NOR flash, is it supported too ?
> Kinda. If you have to access the small fragments seperately, you might
> run into problems. But that is usually only done from a bootloader,
> not from linux.
> For all practical purposes, yupp.
> Jörn
> -- 
> Fancy algorithms are slow when n is small, and n is usually small.
> Fancy algorithms have big constants. Until you know that n is
> frequently going to be big, don't get fancy.
> -- Rob Pike

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