SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.c

   1 /** @file
   2   Debug Port Library implementation based on usb3 debug port.
   3
   4   Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php.
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <Base.h>
  16 #include <PiDxe.h>
  17 #include <Library/UefiBootServicesTableLib.h>
  18 #include "DebugCommunicationLibUsb3Internal.h"
  19
  20 /**
  21   Allocate aligned memory for XHC's usage.
  22
  23   @param  BufferSize      The size, in bytes, of the Buffer.
  24
  25   @return A pointer to the allocated buffer or NULL if allocation fails.
  26
  27 **/
  28 VOID*
  29 AllocateAlignBuffer (
  30   IN UINTN                    BufferSize
  31   )
  32 {
  33   VOID      *Buf;
  34
  35   Buf = NULL;
  36
  37   if (gBS != NULL) {
  38     Buf = (VOID *)(UINTN)0xFFFFFFFF;
  39     gBS->AllocatePages (
  40            AllocateMaxAddress,
  41            EfiACPIMemoryNVS,
  42            EFI_SIZE_TO_PAGES (BufferSize),
  43            (EFI_PHYSICAL_ADDRESS *) &Buf
  44            );
  45   }
  46
  47   return Buf;
  48 }