[flashrom] Where is read lock typically implemented?

[Ross Amans]

There are two kinds of read locks that I know of.
In the descriptor region of the flash are permissions for each region in
the flash
(BIOS, GbE, ME, for example).
These can write protect, and read protect, the flash regions.
There is also flags for the whole flash which are set in the PCH.
The BIOS sets these flags.
Ross


On Tue, Aug 5, 2014 at 10:55 AM, TR Reardon <thomas_reardon at hotmail.com>
wrote:

> I tried looking for an answer to this but a quick one didn't surface: when
> flash regions are protected, is this implemented by the flash chip itself
> or by the SPI logic (ie ichspi for Intel programmer)?
>
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-- 
Ross Amans
Systems Engineer
Newisys div of Sanmina
5385 Mark Dabling blvd
Colorado Springs, CO 80918
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