path: root/ReferenceCode/Haswell/CpuInit/Dxe/MtrrSync.c

/** @file
  Code which support multi-processor

@copyright
  Copyright (c) 1999 - 2012 Intel Corporation. All rights reserved
  This software and associated documentation (if any) is furnished
  under a license and may only be used or copied in accordance
  with the terms of the license. Except as permitted by such
  license, no part of this software or documentation may be
  reproduced, stored in a retrieval system, or transmitted in any
  form or by any means without the express written consent of
  Intel Corporation.

  This file contains an 'Intel Peripheral Driver' and is
  licensed for Intel CPUs and chipsets under the terms of your
  license agreement with Intel or your vendor.  This file may
  be modified by the user, subject to additional terms of the
  license agreement
**/
#if !defined(EDK_RELEASE_VERSION) || (EDK_RELEASE_VERSION < 0x00020000)
#include "EdkIIGlueDxe.h"
#include "MpService.h"
#endif

extern MP_SYSTEM_DATA *mMPSystemData;

EFI_MTRR_VALUES mFixedMtrrValues[] = {
  {
    IA32_MTRR_FIX64K_00000,
    0
  },
  {
    IA32_MTRR_FIX16K_80000,
    0
  },
  {
    IA32_MTRR_FIX16K_A0000,
    0
  },
  {
    IA32_MTRR_FIX4K_C0000,
    0
  },
  {
    IA32_MTRR_FIX4K_C8000,
    0
  },
  {
    IA32_MTRR_FIX4K_D0000,
    0
  },
  {
    IA32_MTRR_FIX4K_D8000,
    0
  },
  {
    IA32_MTRR_FIX4K_E0000,
    0
  },
  {
    IA32_MTRR_FIX4K_E8000,
    0
  },
  {
    IA32_MTRR_FIX4K_F0000,
    0
  },
  {
    IA32_MTRR_FIX4K_F8000,
    0
  }
};

EFI_MTRR_VALUES mMtrrDefType[] = { { CACHE_IA32_MTRR_DEF_TYPE, 0 } };

///
/// Pre-defined Variable MTRR number to 20
///
EFI_MTRR_VALUES mVariableMtrrValues[] = {
  {
    CACHE_VARIABLE_MTRR_BASE,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 1,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 2,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 3,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 4,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 5,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 6,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 7,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 8,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 9,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 10,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 11,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 12,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 13,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 14,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 15,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 16,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 17,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 18,
    0
  },
  {
    CACHE_VARIABLE_MTRR_BASE + 19,
    0
  }
};

/**
  Save the MTRR registers to global variables
**/
VOID
ReadMtrrRegisters (
  VOID
  )
{

  UINT32 Index;
  UINT32 VariableMtrrLimit;

  VariableMtrrLimit = (UINT32) (AsmReadMsr64 (IA32_MTRR_CAP) & B_IA32_MTRR_VARIABLE_SUPPORT);
  ///
  /// Only support MAXIMUM_VARIABLE_MTRR_NUMBER variable MTRR
  ///
  ASSERT (VariableMtrrLimit <= V_MAXIMUM_VARIABLE_MTRR_NUMBER);
  if (VariableMtrrLimit > V_MAXIMUM_VARIABLE_MTRR_NUMBER) {
    VariableMtrrLimit = V_MAXIMUM_VARIABLE_MTRR_NUMBER;
  }
  ///
  /// Read Fixed Mtrrs
  ///
  for (Index = 0; Index < sizeof (mFixedMtrrValues) / sizeof (EFI_MTRR_VALUES); Index++) {
    mFixedMtrrValues[Index].Value = AsmReadMsr64 (mFixedMtrrValues[Index].Index);
  }
  ///
  /// Read def type Fixed Mtrrs
  ///
  mMtrrDefType[0].Value = AsmReadMsr64 (CACHE_IA32_MTRR_DEF_TYPE);

  ///
  /// Read Variable Mtrr
  ///
  for (Index = 0; Index < VariableMtrrLimit * 2; Index++) {
    mVariableMtrrValues[Index].Value = AsmReadMsr64 (mVariableMtrrValues[Index].Index);
  }

  return;
}

/**
  Synch up the MTRR values for all processors

  @param[in] Buffer - Not used.
**/
VOID
EFIAPI
MpMtrrSynchUp (
  IN VOID *Buffer
  )
{
  UINT32             Index;
  UINTN              Cr4;
  UINT64             MsrValue;
  UINT64             ValidMtrrAddressMask;
  EFI_CPUID_REGISTER FeatureInfo;
  EFI_CPUID_REGISTER FunctionInfo;
  UINT8              PhysicalAddressBits;
  UINT32             VariableMtrrLimit;

  VariableMtrrLimit = (UINT32) (AsmReadMsr64 (IA32_MTRR_CAP) & B_IA32_MTRR_VARIABLE_SUPPORT);
  ///
  /// Only support MAXIMUM_VARIABLE_MTRR_NUMBER variable MTRR
  ///
  ASSERT (VariableMtrrLimit <= V_MAXIMUM_VARIABLE_MTRR_NUMBER);
  if (VariableMtrrLimit > V_MAXIMUM_VARIABLE_MTRR_NUMBER) {
    VariableMtrrLimit = V_MAXIMUM_VARIABLE_MTRR_NUMBER;
  }
  ///
  /// ASM code to setup processor register before synching up the MTRRs
  ///
  Cr4 = MpMtrrSynchUpEntry ();

  ///
  /// Get physical CPU MTRR width in case of difference from BSP
  ///
  AsmCpuid (
          CPUID_EXTENDED_FUNCTION,
          &FunctionInfo.RegEax,
          &FunctionInfo.RegEbx,
          &FunctionInfo.RegEcx,
          &FunctionInfo.RegEdx
          );
  PhysicalAddressBits = 36;
  if (FunctionInfo.RegEax >= CPUID_VIR_PHY_ADDRESS_SIZE) {
    AsmCpuid (
            CPUID_VIR_PHY_ADDRESS_SIZE,
            &FeatureInfo.RegEax,
            &FeatureInfo.RegEbx,
            &FeatureInfo.RegEcx,
            &FeatureInfo.RegEdx
            );
    PhysicalAddressBits = (UINT8) FeatureInfo.RegEax;
  }

  ValidMtrrAddressMask = ((((UINT64) 1) << PhysicalAddressBits) - 1) & 0xfffffffffffff000;

  ///
  /// Disable Fixed Mtrrs
  ///
  AsmWriteMsr64 (CACHE_IA32_MTRR_DEF_TYPE, mMtrrDefType[0].Value & 0xFFFFF7FF);

  ///
  /// Update Fixed Mtrrs
  ///
  for (Index = 0; Index < sizeof (mFixedMtrrValues) / sizeof (EFI_MTRR_VALUES); Index++) {
    AsmWriteMsr64 (mFixedMtrrValues[Index].Index, mFixedMtrrValues[Index].Value);
  }
  ///
  /// Synchup def type Fixed Mtrrs
  ///
  AsmWriteMsr64 (CACHE_IA32_MTRR_DEF_TYPE, mMtrrDefType[0].Value);

  ///
  /// Synchup Base Variable Mtrr
  ///
  for (Index = 0; Index < VariableMtrrLimit * 2 - 1; Index += 2) {
    MsrValue = (mVariableMtrrValues[Index].Value & 0x0FFF) | (mVariableMtrrValues[Index].Value & ValidMtrrAddressMask);
    AsmWriteMsr64 (mVariableMtrrValues[Index].Index, MsrValue);
  }
  ///
  /// Synchup Mask Variable Mtrr including valid bit
  ///
  for (Index = 1; Index < VariableMtrrLimit * 2; Index += 2) {
    MsrValue = (mVariableMtrrValues[Index].Value & 0x0FFF) | (mVariableMtrrValues[Index].Value & ValidMtrrAddressMask);
    AsmWriteMsr64 (mVariableMtrrValues[Index].Index, MsrValue);
  }
  ///
  /// ASM code to setup processor register after synching up the MTRRs
  ///
  MpMtrrSynchUpExit (Cr4);

  return;
}

/**
  Copy Global MTRR data to S3
**/
VOID
SaveBspMtrrForS3 (
  VOID
  )
{
  UINTN  Index;
  UINTN  TableIndex;
  UINT32 VariableMtrrLimit;

  VariableMtrrLimit = (UINT32) (AsmReadMsr64 (IA32_MTRR_CAP) & B_IA32_MTRR_VARIABLE_SUPPORT);
  ///
  /// Only support MAXIMUM_VARIABLE_MTRR_NUMBER variable MTRR
  ///
  ASSERT (VariableMtrrLimit <= V_MAXIMUM_VARIABLE_MTRR_NUMBER);
  if (VariableMtrrLimit > V_MAXIMUM_VARIABLE_MTRR_NUMBER) {
    VariableMtrrLimit = V_MAXIMUM_VARIABLE_MTRR_NUMBER;
  }

  TableIndex = 0;
  for (Index = 0; Index < sizeof (mFixedMtrrValues) / sizeof (EFI_MTRR_VALUES); Index++) {
    mMPSystemData->S3BspMtrrTable[TableIndex].Index = mFixedMtrrValues[Index].Index;
    mMPSystemData->S3BspMtrrTable[TableIndex].Value = mFixedMtrrValues[Index].Value;
    TableIndex++;
  }

  for (Index = 0; Index < VariableMtrrLimit * 2; Index++) {
    mMPSystemData->S3BspMtrrTable[TableIndex].Index = mVariableMtrrValues[Index].Index;
    mMPSystemData->S3BspMtrrTable[TableIndex].Value = mVariableMtrrValues[Index].Value;
    TableIndex++;
  }

  mMPSystemData->S3BspMtrrTable[TableIndex].Index = CACHE_IA32_MTRR_DEF_TYPE;
  mMPSystemData->S3BspMtrrTable[TableIndex].Value = mMtrrDefType[0].Value;

  ASSERT (TableIndex < MAX_CPU_S3_MTRR_ENTRY);

  return;
}