[LinuxBIOS] [Fwd: Hardware Write-Protect for BIOS & EC]

Wahl, David David.Wahl at amd.com
Fri Mar 24 18:31:29 CET 2006

A corrupted ROM has to be followed by a system restore, either manual or
automatic, depending on the level of intelligence you want to build into
the hardware.  I have seen scenarios where restore partition is in an
unwritable location and there is a ROM in some safe location whose sole
purpose is to restore from the protected partition.


-----Original Message-----
From: linuxbios-bounces at linuxbios.org
[mailto:linuxbios-bounces at linuxbios.org] On Behalf Of Ronald G Minnich
Sent: Thursday, March 23, 2006 10:38 AM
To: Lu, Yinghai
Cc: jg at laptop.org; LinuxBIOS
Subject: Re: [LinuxBIOS] [Fwd: Hardware Write-Protect for BIOS & EC]

Lu, Yinghai wrote:
> 1. in you suggestion. When you are flash the rom, if sth go wrong 
> (lose power), you will corrupt your rom.
> 2. are you going to use fallback image with normal image?
> If so you can disable the write to last 128K ( fallback image part) 
> via HW jumper.  ---- No one could change the fallback image without 
> remove the jumper. Some MB already have that for last 64k.

I think that having a 'you can never write this' bios image would be
useful. The power fail scenario is a concern.


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