CloverBootloader/ArmPkg/Library/ArmLib/ArmLib.c

/** @file

  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
  Copyright (c) 2011 - 2021, ARM Ltd. All rights reserved.<BR>

  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include <Base.h>

#include <Library/ArmLib.h>

#include "ArmLibPrivate.h"

VOID
EFIAPI
ArmSetAuxCrBit (
  IN  UINT32  Bits
  )
{
  ArmWriteAuxCr (ArmReadAuxCr () | Bits);
}

VOID
EFIAPI
ArmUnsetAuxCrBit (
  IN  UINT32  Bits
  )
{
  ArmWriteAuxCr (ArmReadAuxCr () & ~Bits);
}

//
// Helper functions for accessing CPUACTLR
//

VOID
EFIAPI
ArmSetCpuActlrBit (
  IN  UINTN  Bits
  )
{
  ArmWriteCpuActlr (ArmReadCpuActlr () | Bits);
}

VOID
EFIAPI
ArmUnsetCpuActlrBit (
  IN  UINTN  Bits
  )
{
  ArmWriteCpuActlr (ArmReadCpuActlr () & ~Bits);
}

UINTN
EFIAPI
ArmDataCacheLineLength (
  VOID
  )
{
  return 4 << ((ArmCacheInfo () >> 16) & 0xf); // CTR_EL0.DminLine
}

UINTN
EFIAPI
ArmInstructionCacheLineLength (
  VOID
  )
{
  return 4 << (ArmCacheInfo () & 0xf); // CTR_EL0.IminLine
}

UINTN
EFIAPI
ArmCacheWritebackGranule (
  VOID
  )
{
  UINTN  CWG;

  CWG = (ArmCacheInfo () >> 24) & 0xf; // CTR_EL0.CWG

  if (CWG == 0) {
    return SIZE_2KB;
  }

  return 4 << CWG;
}