答复: flash_rom start and size
ollie at lanl.gov
Wed Apr 21 11:35:01 CEST 2004
On Wed, 2004-04-21 at 10:40, YhLu wrote:
> For example,
> 1. I only want to let end user to flash normal part [0-384k), and don't let
> him touch fallback part [384k, 512k).
there is no way you can really lock the flash.
> 2. or I only want to update the payload image in the beginning, [0,64k).
you need some kind of flash translation layer to accomplish this. You
need to back up some part of the erase block you want reserve , erase
the block and write with updated and reserved data.
You probably need MTD.
> Yinghai Lu
> 发件人: Li-Ta Lo [mailto:ollie at lanl.gov]
> 发送时间: 2004年4月21日 9:09
> 收件人: YhLu
> 抄送: LinuxBIOS
> 主题: Re: flash_rom start and size
> On Tue, 2004-04-20 at 20:06, YhLu wrote:
> > Ollie or David,
> > Can you modify the flash_rom to take start and size command line?
> > I mean
> > Flash_rom -start=0k -size=384k xxxx.rom
> > And xxxx.rom only to be 384k.
> Why do you want to do this ? You should prepare the image
> the same size as your flash chip.
> There are techinical difficulty doing this. Most flash
> parts are block/sector erase and byte program. There is
> no general way to start from an abitrary address to any
> > Regards
> > YH
> Linuxbios mailing list
> Linuxbios at clustermatic.org
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