MdeModulePkg PciBusDxe: The PCI Bus Driver is updated to support multiple PCI bus...

[mirror_edk2.git] / MdeModulePkg / Bus / Pci / PciBusDxe / PciLib.h

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h
index 87a846376f30be1a7f478b8843f811a6b2fcde27..6c2ade3f36719aa89fcdd281f0c86f78dd76eb87 100644 (file)
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.h
@@ -1,7 +1,7 @@
 /** @file\r
   Internal library declaration for PCI Bus module.\r
 \r
-Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -74,6 +74,27 @@ PciHostBridgeResourceAllocator (
   IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *PciResAlloc\r
   );\r
 \r
+/**\r
+  Allocate NumberOfBuses buses and return the next available PCI bus number.\r
+\r
+  @param  Bridge           Bridge device instance.\r
+  @param  StartBusNumber   Current available PCI bus number.\r
+  @param  NumberOfBuses    Number of buses enumerated below the StartBusNumber.\r
+  @param  NextBusNumber    Next available PCI bus number.\r
+\r
+  @retval EFI_SUCCESS           Available bus number resource is enough. Next available PCI bus number\r
+                                is returned in NextBusNumber.\r
+  @retval EFI_OUT_OF_RESOURCES  Available bus number resource is not enough for allocation.\r
+\r
+**/\r
+EFI_STATUS\r
+PciAllocateBusNumber (\r
+  IN PCI_IO_DEVICE                      *Bridge,\r
+  IN UINT8                              StartBusNumber,\r
+  IN UINT8                              NumberOfBuses,\r
+  OUT UINT8                             *NextBusNumber\r
+  );\r
+\r
 /**\r
   Scan pci bus and assign bus number to the given PCI bus system.\r
 \r