SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.c

   1 /** @file
   2   Debug Port Library implementation based on usb3 debug port.
   3
   4   Copyright (c) 2014 - 2016, 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   EFI_PHYSICAL_ADDRESS    TmpAddr;
  34   EFI_STATUS              Status;
  35   VOID                    *Buf;
  36
  37   Buf = NULL;
  38
  39   if (gBS != NULL) {
  40     TmpAddr = 0xFFFFFFFF;
  41     Status = gBS->AllocatePages (
  42                AllocateMaxAddress,
  43                EfiACPIMemoryNVS,
  44                EFI_SIZE_TO_PAGES (BufferSize),
  45                &TmpAddr
  46                );
  47     if (!EFI_ERROR (Status)) {
  48       Buf = (VOID *) (UINTN) TmpAddr;
  49     }
  50   }
  51
  52   return Buf;
  53 }