MdePkg/Library/BaseCacheMaintenanceLib/x86Cache.c

   1 /** @file
   2   Cache Maintenance Functions.
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   5   All rights reserved. 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   Module Name:  x86Cache.c
  14
  15 **/
  16
  17 VOID
  18 EFIAPI
  19 InvalidateInstructionCache (
  20   VOID
  21   )
  22 {
  23   return;
  24 }
  25
  26 VOID *
  27 EFIAPI
  28 InvalidateInstructionCacheRange (
  29   IN      VOID                      *Address,
  30   IN      UINTN                     Length
  31   )
  32 {
  33   return Address;
  34 }
  35
  36 VOID
  37 EFIAPI
  38 WriteBackInvalidateDataCache (
  39   VOID
  40   )
  41 {
  42   AsmWbinvd ();
  43 }
  44
  45 VOID *
  46 EFIAPI
  47 WriteBackInvalidateDataCacheRange (
  48   IN      VOID                      *Address,
  49   IN      UINTN                     Length
  50   )
  51 {
  52   if (Length != 0) {
  53     AsmWbinvd ();
  54   }
  55   return Address;
  56 }
  57
  58 VOID
  59 EFIAPI
  60 WriteBackDataCache (
  61   VOID
  62   )
  63 {
  64   AsmWbinvd ();
  65 }
  66
  67 VOID *
  68 EFIAPI
  69 WriteBackDataCacheRange (
  70   IN      VOID                      *Address,
  71   IN      UINTN                     Length
  72   )
  73 {
  74   AsmWbinvd ();
  75   return Address;
  76 }
  77
  78 VOID
  79 EFIAPI
  80 InvalidateDataCache (
  81   VOID
  82   )
  83 {
  84   AsmInvd ();
  85 }
  86
  87 VOID *
  88 EFIAPI
  89 InvalidateDataCacheRange (
  90   IN      VOID                      *Address,
  91   IN      UINTN                     Length
  92   )
  93 {
  94   return Address;
  95 }