/**
  Registers a PCI device so PCI configuration registers may be accessed after 
  SetVirtualAddressMap().
  
  Registers the PCI device specified by Address so all the PCI configuration registers 
  associated with that PCI device may be accessed after SetVirtualAddressMap() is called.
  
  If Address > 0x0FFFFFFF, then ASSERT().

  @param  Address The 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
  )
{
  ASSERT_INVALID_PCI_ADDRESS (Address, 0);
  return RETURN_UNSUPPORTED;
}

/**
  Reads a 32-bit PCI configuration register.

  Reads and returns the 32-bit PCI configuration register specified by Address.
  This function must guarantee that all PCI read and write operations are
  serialized.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, then ASSERT().

  @param  Address The address that encodes the PCI Bus, Device, Function and
                  Register.

  @return The read value from the PCI configuration register.

**/
UINT32
EFIAPI
PciRead32 (
  IN      UINTN                     Address
  )
{
  ASSERT_INVALID_PCI_ADDRESS (Address, 3);

  return PeiPciLibPciCfg2ReadWorker (Address, EfiPeiPciCfgWidthUint32);
}