[coreboot] cbfs XIP patch

Carl-Daniel Hailfinger c-d.hailfinger.devel.2006 at gmx.net
Tue May 5 21:32:16 CEST 2009

On 05.05.2009 19:36, ron minnich wrote:
> Isn't this somewhat mythical anyway? how many flash chips support
> 'erase byte' at this point (I honestly don't know!). I.e., isn't an
> update of any one byte in a block going to wipe out a whole block? How
> many cbfs files fit on neat 64k or 16k or whatever boundaries?

Intel specifies that each flash chip location (byte) must be writable at
least twice after each erase, so you can update a previously written
byte once (well, set some more bits to 0) without erasing.



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