BAR settings might be lost if link transitions into L0s.
解决方案
On most systems, the default setting for Active State Power Management is "off". This issue occurs only if ASPM is in use, or if there is a programmed power management event to move the link to L0s.
For other Endpoint Block Plus Wrapper v1.11 for PCI Express Known Issues and Release Notes, see (Xilinx Answer 32741).
Revision History
09/16/2009- Updated for ISE 11.3 and core version v1.12.
06/24/2009- Updated for ISE 11.2 and core version v1.11.
04/13/2009- Updated for ISE 11.1 and core version v1.10.