ArmPkg/Library/ArmLib/Common/ArmLib.c

   1 /** @file
   2
   3   Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   4   Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
   5
   6   This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <Base.h>
  17
  18 #include <Library/ArmLib.h>
  19 #include <Library/DebugLib.h>
  20 #include <Library/PcdLib.h>
  21
  22 #include "ArmLibPrivate.h"
  23
  24 VOID
  25 EFIAPI
  26 ArmSetAuxCrBit (
  27   IN  UINT32    Bits
  28   )
  29 {
  30   UINT32 val = ArmReadAuxCr();
  31   val |= Bits;
  32   ArmWriteAuxCr(val);
  33 }
  34
  35 VOID
  36 EFIAPI
  37 ArmUnsetAuxCrBit (
  38   IN  UINT32    Bits
  39   )
  40 {
  41   UINT32 val = ArmReadAuxCr();
  42   val &= ~Bits;
  43   ArmWriteAuxCr(val);
  44 }
  45
  46 //
  47 // Helper functions for accessing CPUACTLR
  48 //
  49
  50 VOID
  51 EFIAPI
  52 ArmSetCpuActlrBit (
  53   IN  UINTN    Bits
  54   )
  55 {
  56   UINTN Value;
  57   Value =  ArmReadCpuActlr ();
  58   Value |= Bits;
  59   ArmWriteCpuActlr (Value);
  60 }
  61
  62 VOID
  63 EFIAPI
  64 ArmUnsetCpuActlrBit (
  65   IN  UINTN    Bits
  66   )
  67 {
  68   UINTN Value;
  69   Value = ArmReadCpuActlr ();
  70   Value &= ~Bits;
  71   ArmWriteCpuActlr (Value);
  72 }
  73
  74 UINTN
  75 EFIAPI
  76 ArmDataCacheLineLength (
  77   VOID
  78   )
  79 {
  80   return 4 << ((ArmCacheInfo () >> 16) & 0xf); // CTR_EL0.DminLine
  81 }
  82
  83 UINTN
  84 EFIAPI
  85 ArmInstructionCacheLineLength (
  86   VOID
  87   )
  88 {
  89   return 4 << (ArmCacheInfo () & 0xf); // CTR_EL0.IminLine
  90 }
  91
  92 UINTN
  93 EFIAPI
  94 ArmCacheWritebackGranule (
  95   VOID
  96   )
  97 {
  98   UINTN   CWG;
  99
 100   CWG = (ArmCacheInfo () >> 24) & 0xf; // CTR_EL0.CWG
 101
 102   if (CWG == 0) {
 103     return SIZE_2KB;
 104   }
 105
 106   return 4 << CWG;
 107 }