1 files changed, 27 insertions, 0 deletions
diff --git a/MdePkg/Library/BasePciLibPciExpress/PciLib.c b/MdePkg/Library/BasePciLibPciExpress/PciLib.c
index c1abd09f63..48fe66f180 100644
--- a/MdePkg/Library/BasePciLibPciExpress/PciLib.c
+++ b/MdePkg/Library/BasePciLibPciExpress/PciLib.c
@@ -20,6 +20,33 @@
 #include <Library/PciExpressLib.h>
 
 /**
+  Register a PCI device so PCI configuration registers may be accessed after 
+  SetVirtualAddressMap().
+  
+  If Address > 0x0FFFFFFF, then ASSERT().
+
+  @param  Address Address that encodes the PCI Bus, Device, Function and
+                  Register.
+  
+  @retval RETURN_SUCCESS           The PCI device was registered for runtime access.
+  @retval RETURN_UNSUPPORTED       An attempt was made to call this function 
+                                   after ExitBootServices().
+  @retval RETURN_UNSUPPORTED       The resources required to access the PCI device
+                                   at runtime could not be mapped.
+  @retval RETURN_OUT_OF_RESOURCES  There are not enough resources available to
+                                   complete the registration.
+
+**/
+RETURN_STATUS
+EFIAPI
+PciRegisterForRuntimeAccess (
+  IN UINTN  Address
+  )
+{
+  return PciExpressRegisterForRuntimeAccess (Address);
+}
+
+/**
   Reads an 8-bit PCI configuration register.
 
   Reads and returns the 8-bit PCI configuration register specified by Address.