ArmPkg/ArmLib: add ArmHasGicSystemRegisters () helper function

[mirror_edk2.git] / ArmPkg / Library / ArmLib / 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
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Base.h>\r
\r
#include <Library/ArmLib.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