path: root/src/vendorcode/amd/agesa/f15tn/Proc/CPU/Feature/cpuLowPwrPstate.c

/* $NoKeywords:$ */
/**
 * @file
 *
 * AMD AGESA CPU create low power P-state for PROCHOT_L throttling support code.
 *
 * Contains code that declares the AGESA CPU low power P-state related APIs
 *
 * @xrefitem bom "File Content Label" "Release Content"
 * @e project:      AGESA
 * @e sub-project:  CPU/Feature
 * @e \$Revision: 63523 $   @e \$Date: 2011-12-25 20:31:15 -0600 (Sun, 25 Dec 2011) $
 *
 */
/*
 ******************************************************************************
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/*----------------------------------------------------------------------------------------
 *                             M O D U L E S    U S E D
 *----------------------------------------------------------------------------------------
 */
#include "AGESA.h"
#include "amdlib.h"
#include "GeneralServices.h"
#include "cpuFamilyTranslation.h"
#include "cpuApicUtilities.h"
#include "OptionMultiSocket.h"
#include "cpuRegisters.h"
#include "cpuApicUtilities.h"
#include "cpuFeatures.h"
#include "cpuLowPwrPstate.h"
#include "Filecode.h"
CODE_GROUP (G1_PEICC)
RDATA_GROUP (G1_PEICC)

#define FILECODE PROC_CPU_FEATURE_CPULOWPWRPSTATE_FILECODE

/*----------------------------------------------------------------------------------------
 *                   D E F I N I T I O N S    A N D    M A C R O S
 *----------------------------------------------------------------------------------------
 */
extern OPTION_MULTISOCKET_CONFIGURATION OptionMultiSocketConfiguration;

/*----------------------------------------------------------------------------------------
 *                  T Y P E D E F S     A N D     S T R U C T U  R E S
 *----------------------------------------------------------------------------------------
 */

/*----------------------------------------------------------------------------------------
 *           P R O T O T Y P E S     O F     L O C A L     F U  N C T I O N S
 *----------------------------------------------------------------------------------------
 */
VOID
STATIC
EnableLowPwrPstateOnSocket (
  IN       VOID *PlatformConfig,
  IN       AMD_CONFIG_PARAMS *StdHeader
  );

VOID
STATIC
ProgramHtcPstateLimit (
  IN       VOID *PlatformConfig,
  IN       AMD_CONFIG_PARAMS *StdHeader
  );

/*----------------------------------------------------------------------------------------
 *                          E X P O R T E D    F U N C T I O N S
 *----------------------------------------------------------------------------------------
 */
extern CPU_FAMILY_SUPPORT_TABLE LowPwrPstateFamilyServiceTable;

/*---------------------------------------------------------------------------------------*/
/**
 *  Should Low Power P-state be enabled
 *  If all processors support Low Power P-state, reture TRUE, otherwise reture FALSE
 *
 * @param[in]    PlatformConfig     Contains the runtime modifiable feature input data.
 * @param[in]    StdHeader          Config Handle for library, services.
 *
 * @retval       TRUE               Low Power P-state is supported.
 * @retval       FALSE              Low Power P-state cannot be enabled.
 *
 */
BOOLEAN
STATIC
IsLowPwrPstateFeatureSupported (
  IN       PLATFORM_CONFIGURATION *PlatformConfig,
  IN       AMD_CONFIG_PARAMS      *StdHeader
  )
{
  UINT32              Socket;
  BOOLEAN             IsSupported;
  LOW_PWR_PSTATE_FAMILY_SERVICES *FamilyServices;

  IsSupported = FALSE;
  if (PlatformConfig->LowPowerPstateForProcHot == LOW_POWER_PSTATE_FOR_PROCHOT_AUTO) {
    for (Socket = 0; Socket < GetPlatformNumberOfSockets (); Socket++) {
      if (IsProcessorPresent (Socket, StdHeader)) {
        GetFeatureServicesOfSocket (&LowPwrPstateFamilyServiceTable, Socket, (CONST VOID **)&FamilyServices, StdHeader);
        if (FamilyServices != NULL) {
          if (FamilyServices->IsLowPwrPstateSupported (FamilyServices, PlatformConfig, Socket, StdHeader)) {
            IsSupported = TRUE;
          } else {
            IsSupported = FALSE;
            break;
          }
        } else {
          IsSupported = FALSE;
          break;
        }
      }
    }
  }
  IDS_OPTION_HOOK (IDS_LOW_POWER_PSTATE, &IsSupported, StdHeader);
  return IsSupported;
}

/*---------------------------------------------------------------------------------------*/
/**
 *  Enable low power P-state
 *
 * @param[in]    EntryPoint         Timepoint designator.
 * @param[in]    PlatformConfig     Contains the runtime modifiable feature input data.
 * @param[in]    StdHeader          Config Handle for library, services.
 *
 * @retval       AGESA_SUCCESS      Always succeeds.
 *
 */
AGESA_STATUS
STATIC
InitializeLowPwrPstateFeature (
  IN       UINT64                 EntryPoint,
  IN       PLATFORM_CONFIGURATION *PlatformConfig,
  IN       AMD_CONFIG_PARAMS      *StdHeader
  )
{
  UINT32       BscSocket;
  UINT32       Ignored;
  UINT32       BscCoreNum;
  UINT32       Core;
  UINT32       Socket;
  UINT32       NumberOfSockets;
  UINT32       NumberOfCores;
  AP_TASK      TaskPtr;
  AGESA_STATUS IgnoredSts;

  IdentifyCore (StdHeader, &BscSocket, &Ignored, &BscCoreNum, &IgnoredSts);
  NumberOfSockets = GetPlatformNumberOfSockets ();

  if (!IsWarmReset (StdHeader)) {
    IDS_HDT_CONSOLE (CPU_TRACE, "    Low pwr P-state is enabled\n");

    TaskPtr.FuncAddress.PfApTaskI = EnableLowPwrPstateOnSocket;
    TaskPtr.DataTransfer.DataSizeInDwords = 2;
    TaskPtr.DataTransfer.DataPtr = PlatformConfig;
    TaskPtr.DataTransfer.DataTransferFlags = 0;
    TaskPtr.ExeFlags = WAIT_FOR_CORE;

    for (Socket = 0; Socket < NumberOfSockets; Socket++) {
      if (GetActiveCoresInGivenSocket (Socket, &NumberOfCores, StdHeader)) {
        for (Core = 0; Core < NumberOfCores; Core++) {
          if ((Socket != BscSocket) || (Core != BscCoreNum)) {
            ApUtilRunCodeOnSocketCore ((UINT8) Socket, (UINT8) Core, &TaskPtr, StdHeader);
          }
        }
      }
    }

    EnableLowPwrPstateOnSocket (PlatformConfig, StdHeader);
  } else {
    TaskPtr.FuncAddress.PfApTaskI = ProgramHtcPstateLimit;
    TaskPtr.DataTransfer.DataSizeInDwords = 2;
    TaskPtr.DataTransfer.DataPtr = PlatformConfig;
    TaskPtr.DataTransfer.DataTransferFlags = 0;
    TaskPtr.ExeFlags = WAIT_FOR_CORE;

    for (Socket = 0; Socket < NumberOfSockets; Socket++) {
      if (IsProcessorPresent (Socket, StdHeader)) {
        if (Socket != BscSocket) {
          ApUtilRunCodeOnSocketCore ((UINT8) Socket, 0, &TaskPtr, StdHeader);
        }
      }
    }

    ProgramHtcPstateLimit (PlatformConfig, StdHeader);
  }
  return AGESA_SUCCESS;
}

/*---------------------------------------------------------------------------------------*/
/**
 *  All APs task to enable low power P-state
 *
 * @param[in]    PlatformConfig     Contains the runtime modifiable feature input data.
 * @param[in]    StdHeader          Config Handle for library, services.
 *
 */
VOID
STATIC
EnableLowPwrPstateOnSocket (
  IN       VOID *PlatformConfig,
  IN       AMD_CONFIG_PARAMS *StdHeader
  )
{
  LOW_PWR_PSTATE_FAMILY_SERVICES *FamilyServices;

  GetFeatureServicesOfCurrentCore (&LowPwrPstateFamilyServiceTable, (CONST VOID **)&FamilyServices, StdHeader);
  FamilyServices->EnableLowPwrPstate (FamilyServices,
                                      PlatformConfig,
                                      StdHeader);
}

/*---------------------------------------------------------------------------------------*/
/**
 *  'Local' core 0 task to enable low power P-state
 *
 * @param[in]    PlatformConfig     Contains the runtime modifiable feature input data.
 * @param[in]    StdHeader          Config Handle for library, services.
 *
 */
VOID
STATIC
ProgramHtcPstateLimit (
  IN       VOID *PlatformConfig,
  IN       AMD_CONFIG_PARAMS *StdHeader
  )
{
  UINT32   OrMask;
  UINT32   HtcCtrl;
  UINT32   CPTC2;
  PCI_ADDR PciAddress;

  OptionMultiSocketConfiguration.GetCurrPciAddr (&PciAddress, StdHeader);
  PciAddress.Address.Function = FUNC_3;

  PciAddress.Address.Register = CLOCK_POWER_TIMING_CTRL2_REG;
  LibAmdPciRead (AccessWidth32, PciAddress, &CPTC2, StdHeader);   // F3xDC[10:8] HwPstateMaxVal
  OrMask = CPTC2 & 0x700;
  OrMask = OrMask << 20;

  PciAddress.Address.Register = HARDWARE_THERMAL_CTRL_REG;
  LibAmdPciRead (AccessWidth32, PciAddress, &HtcCtrl, StdHeader); // F3x64[30:28] HtcPstateLimit
  // F3x64[30:28] HtcPstateLimit = F3xDC[10:8] HwPstateMaxVal
  HtcCtrl = (HtcCtrl & 0x8FFFFFFF) | OrMask;
  LibAmdPciWrite (AccessWidth32, PciAddress, &HtcCtrl, StdHeader);
}

CONST CPU_FEATURE_DESCRIPTOR ROMDATA CpuFeatureLowPwrPstate =
{
  LowPwrPstate,
  (CPU_FEAT_BEFORE_RELINQUISH_AP | CPU_FEAT_AFTER_RESUME_MTRR_SYNC),
  IsLowPwrPstateFeatureSupported,
  InitializeLowPwrPstateFeature
};