Add DebugCommunicationLibUsb3 for USB3.0 source level debug support.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Elvin Li <elvin.li@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16224 6f19259b-4bc3-4df7-8a09-765794883524

SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.c

@@ -0,0 +1,45 @@
+/** @file
+  Debug Port Library implementation based on usb3 debug port.
+
+  Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
+  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
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <PiPei.h>
+#include <Library/PeiServicesLib.h>
+#include "DebugCommunicationLibUsb3Internal.h"
+
+/**
+  Allocate aligned memory for XHC's usage.
+
+  @param  BufferSize      The size, in bytes, of the Buffer.
+  
+  @return A pointer to the allocated buffer or NULL if allocation fails.
+
+**/
+VOID*
+AllocateAlignBuffer (
+  IN UINTN                    BufferSize
+  )
+{
+  VOID                     *Buf;
+  EFI_PHYSICAL_ADDRESS     Address;
+  EFI_STATUS               Status;
+  
+  Buf = NULL;  
+  Status = PeiServicesAllocatePages (EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (BufferSize), &Address);
+  if (EFI_ERROR (Status)) {
+    Buf = NULL;
+  } else {
+    Buf = (VOID *)(UINTN) Address;
+  }
+  return Buf;
+}
+