Enhance UpdateCapsule () to support calling multiple times.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10044 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf

@@ -5,7 +5,7 @@
 #  It installs the Capsule Architectural Protocol defined in PI1.0a to signify 
 #  the capsule runtime services are ready.
 #  
-#  Copyright (c) 2006 - 2009, Intel Corporation. <BR>
+#  Copyright (c) 2006 - 2010, Intel Corporation. <BR>
 #  All rights reserved. This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
 #  which accompanies this distribution.  The full text of the license may be found at
@@ -45,6 +45,8 @@
   UefiDriverEntryPoint
   CapsuleLib
   UefiRuntimeLib
+  BaseLib
+  PrintLib
 
 [Guids]
   gEfiCapsuleVendorGuid                         ## SOMETIMES_PRODUCED (Process across reset capsule image) ## Variable:L"CapsuleUpdateData" for capsule updated data

MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleService.c

@@ -27,12 +27,19 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/UefiRuntimeServicesTableLib.h>
 #include <Library/UefiRuntimeLib.h>
+#include <Library/BaseLib.h>
+#include <Library/PrintLib.h>
 
 //
 // Handle for the installation of Capsule Architecture Protocol.
 //
 EFI_HANDLE  mNewHandle = NULL;
 
+//
+// The times of calling UpdateCapsule ()
+//
+UINTN       mTimes      = 0;
+
 /**
   Passes capsules to the firmware with both virtual and physical mapping. Depending on the intended
   consumption, the firmware may process the capsule immediately. If the payload should persist
@@ -72,6 +79,8 @@ UpdateCapsule (
   EFI_CAPSULE_HEADER        *CapsuleHeader;
   BOOLEAN                   NeedReset;
   BOOLEAN                   InitiateReset;
+  CHAR16                    CapsuleVarName[30];
+  CHAR16                    *TempVarName;  
   
   //
   // Capsule Count can't be less than one.
@@ -83,6 +92,7 @@ UpdateCapsule (
   NeedReset         = FALSE;
   InitiateReset     = FALSE;
   CapsuleHeader     = NULL;
+  CapsuleVarName[0] = 0;
 
   for (ArrayNumber = 0; ArrayNumber < CapsuleCount; ArrayNumber++) {
     //
@@ -159,19 +169,34 @@ UpdateCapsule (
     return EFI_UNSUPPORTED;
   }
 
+  //
+  // Construct variable name CapsuleUpdateData, CapsuleUpdateData1, CapsuleUpdateData2...
+  // if user calls UpdateCapsule multiple times.
+  //
+  StrCpy (CapsuleVarName, EFI_CAPSULE_VARIABLE_NAME);
+  TempVarName = CapsuleVarName + StrLen (CapsuleVarName);
+  if (mTimes > 0) {
+    UnicodeValueToString (TempVarName, 0, mTimes, 0);
+  }
+
   //
   // ScatterGatherList is only referenced if the capsules are defined to persist across
   // system reset. Set its value into NV storage to let pre-boot driver to pick it up 
   // after coming through a system reset.
   //
   Status = EfiSetVariable (
-             EFI_CAPSULE_VARIABLE_NAME,
+             CapsuleVarName,
              &gEfiCapsuleVendorGuid,
              EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
              sizeof (UINTN),
              (VOID *) &ScatterGatherList
              );
-  if (!EFI_ERROR (Status) && InitiateReset) {
+  if (!EFI_ERROR (Status)) {
+     //
+     // Variable has been set successfully, increase variable index.
+     //
+     mTimes++;
+     if(InitiateReset) {
        //
        // Firmware that encounters a capsule which has the CAPSULE_FLAGS_INITIATE_RESET Flag set in its header
        // will initiate a reset of the platform which is compatible with the passed-in capsule request and will 
@@ -179,6 +204,7 @@ UpdateCapsule (
        //
        EfiResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
      }
+  }
   return Status;
 }