security/memory: Clear memory in ramstage

* Add architecture independend way of clearing all DRAM
* Implemented in ramstage as MTRRs need to be set to speed up
  clearing. Takes up to 15 seconds per GiB otherwise.
* Use memset_pae on x86
* Add quirks for FSP1.0

Tested on P8H61M-Pro:
* Clears 4GiB in less than 1 second
Tested on wedge100s:
* Clears 8GiB in 2 seconds

Change-Id: Idaadb8fb438e5b95557c0f65a14534e8762fde20
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31550
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions