ArmPkg/ArmLib: add accessor function for Cache Writeback Granule

[mirror_edk2.git] / ArmPkg / Library / ArmLib / Common / ArmLib.c

/** @file\r
\r
  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
  Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>\r
\r
  This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <Base.h>\r
\r
#include <Library/ArmLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PcdLib.h>\r
\r
#include "ArmLibPrivate.h"\r
\r
VOID\r
EFIAPI\r
ArmSetAuxCrBit (\r
  IN  UINT32    Bits\r
  )\r
{\r
  UINT32 val = ArmReadAuxCr();\r
  val |= Bits;\r
  ArmWriteAuxCr(val);\r
}\r
\r
VOID\r
EFIAPI\r
ArmUnsetAuxCrBit (\r
  IN  UINT32    Bits\r
  )\r
{\r
  UINT32 val = ArmReadAuxCr();\r
  val &= ~Bits;\r
  ArmWriteAuxCr(val);\r
}\r
\r
//\r
// Helper functions for accessing CPUACTLR\r
//\r
\r
VOID\r
EFIAPI\r
ArmSetCpuActlrBit (\r
  IN  UINTN    Bits\r
  )\r
{\r
  UINTN Value;\r
  Value =  ArmReadCpuActlr ();\r
  Value |= Bits;\r
  ArmWriteCpuActlr (Value);\r
}\r
\r
VOID\r
EFIAPI\r
ArmUnsetCpuActlrBit (\r
  IN  UINTN    Bits\r
  )\r
{\r
  UINTN Value;\r
  Value = ArmReadCpuActlr ();\r
  Value &= ~Bits;\r
  ArmWriteCpuActlr (Value);\r
}\r
\r
UINTN\r
EFIAPI\r
ArmDataCacheLineLength (\r
  VOID\r
  )\r
{\r
  return 4 << ((ArmCacheInfo () >> 16) & 0xf); // CTR_EL0.DminLine\r
}\r
\r
UINTN\r
EFIAPI\r
ArmInstructionCacheLineLength (\r
  VOID\r
  )\r
{\r
  return 4 << (ArmCacheInfo () & 0xf); // CTR_EL0.IminLine\r
}\r
\r
UINTN\r
EFIAPI\r
ArmCacheWritebackGranule (\r
  VOID\r
  )\r
{\r
  UINTN   CWG;\r
\r
  CWG = (ArmCacheInfo () >> 24) & 0xf; // CTR_EL0.CWG\r
\r
  if (CWG == 0) {\r
    return SIZE_2KB;\r
  }\r
\r
  return 4 << CWG;\r
}\r