Add runtime registration functions to the 4 PCI Library classes

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6703 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 24 insertions, 0 deletions

diff --git a/MdePkg/Include/Library/PciExpressLib.h b/MdePkg/Include/Library/PciExpressLib.h
index 68d17901f6..098f815510 100644
--- a/MdePkg/Include/Library/PciExpressLib.h
+++ b/MdePkg/Include/Library/PciExpressLib.h
@@ -39,6 +39,30 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   (((Offset) & 0xfff) | (((Function) & 0x07) << 12) | (((Device) & 0x1f) << 15) | (((Bus) & 0xff) << 20))

 

 /**

+  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

+PciExpressRegisterForRuntimeAccess (

+  IN UINTN  Address

+  );

+

+/**

   Reads an 8-bit PCI configuration register.

 

   Reads and returns the 8-bit PCI configuration register specified by Address.