tree c57446c4a59c9729332792eb4a2657c2a06510c3
parent 9d7431c848d9f8ec35d9407521164b2b5bb83bf0
author Angel Pons <th3fanbus@gmail.com> 1600715026 +0200
committer Angel Pons <th3fanbus@gmail.com> 1603557042 +0000

nb/intel/ironlake: Add more host bridge PCI IDs

The host bridge PCI device ID can be changed by the firmware. There
is no documentation about it, though. There's 'official' IDs, which
appear in spec updates and Windows drivers, and 'mysterious' IDs,
which Intel doesn't want OSes to know about and thus are not listed.

The current coreboot code seems to be able to change the device ID
of the host bridge, but it seems to be missing a warm reset so that
the device ID changes. Account for the 'mysterious' device IDs in
the northbridge driver, so that booting an OS has a chance to work.

For the sake of completeness, add the PCI device IDs for Clarkdale.
Although only Arrandale is known to work, both of them are Ironlake.

It is possible that the Management Engine handles changing the PCI
device ID, which would not happen when using a broken ME firmware.

Change-Id: I93c9c47e2b0bf13d80c986c7d66b6cdf0e192b22
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45562
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>