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2019-07-02security/memory: Clear memory in ramstagePatrick Rudolph
* 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>