tree ea83ed1735850ae31f4b6e3ae841f562afd800d9
parent a9b3cf3358a2df3038566b3712741ee5763206bb
author Patrick Rudolph <patrick.rudolph@9elements.com> 1696223205 +0200
committer Felix Held <felix-coreboot@felixheld.de> 1696859816 +0000

sb/intel/bd82x6x: Follow PCH BIOS spec

PCH BIOS spec says that BIOS must clear BIT26 in register 0x338
in PEI, as done on lynxpoint.
Copy and adapt the lynxpoint code to do the same on bd82x6x.
Add special case for UM77 chipset, which only has 4 PCIe ports.

Test: System still boots and all PCIe ports are fully working.

Change-Id: I865818c0c22194fffcb2bbdf8c43737b0dce2307
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78225
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>