1. Add DPC protocol and DpcLib library in MdeModulePkg.

2. Add DpcDxe module and DxeDpcLib module in MdeModulePkg
3. Port network stack module to use DPC.
4. Use MIN, and MAX defined in MdePkg to replace NET_MIN and NET_MAX.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4307 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Library/DxeNetLib/DxeNetLib.c

@@ -36,6 +36,8 @@ Abstract:
 #include <Library/MemoryAllocationLib.h>
 
 
+EFI_DPC_PROTOCOL *mDpc = NULL;
+
 //
 // All the supported IP4 maskes in host byte order.
 //
@@ -227,7 +229,7 @@ NetRandomInitSeed (
   UINT32                    Seed;
 
   gRT->GetTime (&Time, NULL);
-  Seed = (~Time.Hour << 24 | Time.Second << 16 | Time.Minute << 8 | Time.Day);
+  Seed = (~Time.Hour << 24 | Time.Day << 16 | Time.Minute << 8 | Time.Second);
   Seed ^= Time.Nanosecond;
   Seed ^= Time.Year << 7;
 
@@ -1276,3 +1278,71 @@ NetLibGetNicHandle (
   return Handle;
 }
 
+/**
+  Add a Deferred Procedure Call to the end of the DPC queue.
+
+  @DpcTpl           The EFI_TPL that the DPC should be invoked.
+  @DpcProcedure     Pointer to the DPC's function.
+  @DpcContext       Pointer to the DPC's context.  Passed to DpcProcedure
+                    when DpcProcedure is invoked.
+
+  @retval  EFI_SUCCESS              The DPC was queued.
+  @retval  EFI_INVALID_PARAMETER    DpcTpl is not a valid EFI_TPL.
+                                    DpcProcedure is NULL.
+  @retval  EFI_OUT_OF_RESOURCES     There are not enough resources available to
+                                    add the DPC to the queue.
+
+**/
+EFI_STATUS
+NetLibQueueDpc (
+  IN EFI_TPL            DpcTpl,
+  IN EFI_DPC_PROCEDURE  DpcProcedure,
+  IN VOID               *DpcContext    OPTIONAL
+  )
+{
+  return mDpc->QueueDpc (mDpc, DpcTpl, DpcProcedure, DpcContext);
+}
+
+/**
+  Add a Deferred Procedure Call to the end of the DPC queue.
+
+  @retval  EFI_SUCCESS              One or more DPCs were invoked.
+  @retval  EFI_NOT_FOUND            No DPCs were invoked.
+
+**/
+EFI_STATUS
+NetLibDispatchDpc (
+  VOID
+  )
+{
+  return mDpc->DispatchDpc(mDpc);
+}
+
+
+/**
+  The constructor function caches the pointer to DPC protocol.
+
+  The constructor function locates DPC protocol from protocol database.
+  It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
+
+  @param  ImageHandle   The firmware allocated handle for the EFI image.
+  @param  SystemTable   A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+NetLibConstructor (
+  IN EFI_HANDLE                ImageHandle,
+  IN EFI_SYSTEM_TABLE          *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = gBS->LocateProtocol (&gEfiDpcProtocolGuid, NULL, (VOID**) &mDpc);
+  ASSERT_EFI_ERROR (Status);
+  ASSERT (mDpc != NULL);
+
+  return Status;
+}