[coreboot] SPI controller and Lock bits

Peter Stuge peter at stuge.se
Wed Oct 17 04:25:04 CEST 2018

Youness Alaoui wrote:
> So, really, a flash rom chip does obey its WP pin, it just depends
> on how it's set.

For all flash with non-volatile status register the WP pin is irrelevant
from reset until software (in same write-enabled flash) writes block
protection into the status register. (Only then does the WP pin matter.)

The later that status register write happens the more time there
is for anything with access to the SPI bus to write to the flash.


More information about the coreboot mailing list