StandaloneMmPkg: MM driver entry point library.

[mirror_edk2.git] / DuetPkg / PciBusNoEnumerationDxe / PciEnumeratorSupport.c

diff --git a/DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c b/DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c
index e5d4755f75b71751301f0054008c164797d1fcfd..ca300cf675f70d01163f2f0ba07fdd99767ecd55 100644 (file)
--- a/DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c
+++ b/DuetPkg/PciBusNoEnumerationDxe/PciEnumeratorSupport.c
@@ -1,6 +1,7 @@
 /*++\r
 \r
-Copyright (c) 2005 - 2009, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2005 - 2016, Intel Corporation. All rights reserved.<BR>\r
+(C) Copyright 2015 Hewlett Packard Enterprise Development LP<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
@@ -196,8 +197,9 @@ Returns:
   PCI_IO_DEVICE       *PciIoDevice;\r
   EFI_PCI_IO_PROTOCOL *PciIo;\r
 \r
-  Status  = EFI_SUCCESS;\r
-  SecBus  = 0;\r
+  Status      = EFI_SUCCESS;\r
+  SecBus      = 0;\r
+  PciIoDevice = NULL;\r
 \r
   for (Device = 0; Device <= PCI_MAX_DEVICE; Device++) {\r
 \r
@@ -215,6 +217,13 @@ Returns:
                 (UINT8) Func\r
                 );\r
 \r
+      if (EFI_ERROR (Status) && Func == 0) {\r
+        //\r
+        // go to next device if there is no Function 0\r
+        //\r
+        break;\r
+      }\r
+\r
       if (!EFI_ERROR (Status)) {\r
 \r
         //\r
@@ -248,13 +257,14 @@ Returns:
           }\r
               \r
           //\r
-          // Deep enumerate the next level bus\r
+          // If the PCI bridge is initialized then enumerate the next level bus\r
           //\r
-          Status = PciPciDeviceInfoCollector (\r
-                    PciIoDevice,\r
-                    (UINT8) (SecBus)\r
-                    );\r
-\r
+          if (SecBus != 0) {\r
+            Status = PciPciDeviceInfoCollector (\r
+                      PciIoDevice,\r
+                      (UINT8) (SecBus)\r
+                      );\r
+          }\r
         }\r
 \r
         if (Func == 0 && !IS_PCI_MULTI_FUNC (&Pci)) {\r
@@ -864,16 +874,12 @@ Returns:
 --*/\r
 {\r
   UINT32      Value;\r
-  //UINT64      BarValue64;\r
   UINT32      OriginalValue;\r
   UINT32      Mask;\r
-  UINT32      Data;\r
-  UINT8       Index;\r
   EFI_STATUS  Status;\r
 \r
   OriginalValue = 0;\r
   Value         = 0;\r
-  //BarValue64    = 0;\r
 \r
   Status = BarExisted (\r
             PciIoDevice,\r
@@ -991,12 +997,7 @@ Returns:
       //\r
       // Fix the length to support some spefic 64 bit BAR\r
       //\r
-      Data  = Value;\r
-      Index = 0;\r
-      for (Data = Value; Data != 0; Data >>= 1) {\r
-        Index ++;\r
-      }\r
-      Value |= ((UINT32)(-1) << Index); \r
+      Value |= ((UINT32)(-1) << HighBitSet32 (Value)); \r
 \r
       //\r
       // Calculate the size of 64bit bar\r