Silicon/ARM/NeoverseN1Soc: Port PCI Segment Library

The BasePCISegment Library in MdePkg doesn't allow configuring
multiple segments required for PCIe and CCIX root port
enumeration. Therefore, a custom PCI Segment library is adapted
from SynQuacerPciSegmentLib and ported for N1Sdp.

In addition to this, the hardware has few other limitations which affects
the access to the PCIe root port:
  1. ECAM space is not contiguous, root port ECAM (BDF = 0:0:0) is isolated
     from rest of the downstream hierarchy ECAM space.
  2. Root port ECAM space is not capable of 8bit/16bit writes.
  3. A slave error is generated when host accesses the configuration
     space of non-available device or unimplemented function on a
     given bus.

The description of the workarounds included for these limitations can
be found in the corresponding files of this patch.

Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@arm.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>

0 files changed, 0 insertions, 0 deletions