nb/intel/x4x: Add DMI/EP init

Hardware / Coreboot - Damien Zammit [zamaudio.com] - 31 May 2016 13:02 UTC

The values were obtained from vendor bios at runtime. I am not 100% sure of the sequence required to initiate them, but guessed from the gm45 code. There may be some status bytes needed to be polled during the sequence that is missing, but as I don't have bios writer's datasheet it's very hard for me to know.

Change-Id: Idd205e0bab5f75e01c6e3a5dc320c08639f52db8

a090ae0 nb/intel/x4x: Add DMI/EP init
src/northbridge/intel/x4x/Makefile.inc | 1 +
src/northbridge/intel/x4x/pcie.c | 176 ++++++++++++++++++++++++++++++++
src/northbridge/intel/x4x/x4x.h | 1 +
3 files changed, 178 insertions(+)

Upstream: review.coreboot.org

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