src/vendorcode/amd/agesa/f15tn/Proc/CPU/cpuWarmReset.c

/* $NoKeywords:$ */
/**
 * @file
 *
 * AMD CPU Warm Reset Implementation.
 *
 * Implement Warm Reset Interface.
 *
 * @xrefitem bom "File Content Label" "Release Content"
 * @e project:      AGESA
 * @e sub-project:  CPU
 * @e \$Revision: 63425 $   @e \$Date: 2011-12-22 11:24:10 -0600 (Thu, 22 Dec 2011) $
 *
 */
/*
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/*----------------------------------------------------------------------------------------
 *                            M O D U L E S    U S E D
 *----------------------------------------------------------------------------------------
 */

#include "AGESA.h"
#include "cpuRegisters.h"
#include "cpuServices.h"
#include "cpuFamilyTranslation.h"
#include "Filecode.h"
CODE_GROUP (G1_PEICC)
RDATA_GROUP (G1_PEICC)

#define FILECODE PROC_CPU_CPUWARMRESET_FILECODE
/*----------------------------------------------------------------------------------------
 *                   D E F I N I T I O N S    A N D    M A C R O S
 *----------------------------------------------------------------------------------------
 */

/*----------------------------------------------------------------------------------------
 *                  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
 *----------------------------------------------------------------------------------------
 */

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

/*---------------------------------------------------------------------------------------*/
/**
 *    This function will set the CPU register warm reset bits.
 *
 *    Note: This function will be called by UEFI BIOS's
 *    The UEFI wrapper code should register this function, to be called back later point
 *    in time, before the wrapper code does warm reset.
 *
 *    @param[in] StdHeader Config handle for library and services
 *    @param[in] Request   Indicate warm reset status
 *
 *---------------------------------------------------------------------------------------
 **/
VOID
SetWarmResetFlag (
  IN       AMD_CONFIG_PARAMS *StdHeader,
  IN       WARM_RESET_REQUEST *Request
  )
{
  CPU_SPECIFIC_SERVICES *FamilySpecificServices;
  FamilySpecificServices = NULL;

  GetCpuServicesOfCurrentCore ((CONST CPU_SPECIFIC_SERVICES **)&FamilySpecificServices, StdHeader);
  FamilySpecificServices->SetWarmResetFlag (FamilySpecificServices, StdHeader, Request);
}

/*---------------------------------------------------------------------------------------*/
/**
 *    This function will get the CPU register warm reset bits.
 *
 *    Note: This function will be called by UEFI BIOS's
 *    The UEFI wrapper code should register this function, to be called back later point
 *    in time, before the wrapper code does warm reset.
 *
 *    @param[in] StdHeader Config handle for library and services
 *    @param[out] Request   Indicate warm reset status
 *
 *---------------------------------------------------------------------------------------
 **/
VOID
GetWarmResetFlag (
  IN       AMD_CONFIG_PARAMS *StdHeader,
     OUT   WARM_RESET_REQUEST *Request
  )
{
  CPU_SPECIFIC_SERVICES *FamilySpecificServices;
  FamilySpecificServices = NULL;

  GetCpuServicesOfCurrentCore ((CONST CPU_SPECIFIC_SERVICES **)&FamilySpecificServices, StdHeader);
  FamilySpecificServices->GetWarmResetFlag (FamilySpecificServices, StdHeader, Request);

  switch (StdHeader->Func) {
  case AMD_INIT_RESET:
    Request->PostStage = (UINT8) WR_STATE_RESET;
    break;
  case AMD_INIT_EARLY:
    Request->PostStage = (UINT8) WR_STATE_EARLY;
    break;
  case AMD_INIT_POST:
    // Fall through to default case
  default:
    Request->PostStage = (UINT8) WR_STATE_POST;
    break;
  }
}
/*----------------------------------------------------------------------------------------
 *                          E X P O R T E D    F U N C T I O N S - (AGESA ONLY)
 *----------------------------------------------------------------------------------------
 */



/*---------------------------------------------------------------------------------------*/
/**
 * Is this boot a warm reset?
 *
 * This function reads the CPU register warm reset bit that is preserved after a warm reset.
 * Which in fact gets set before issuing warm reset.  We just use the BSP's register always.
 *
 * @param[in]       StdHeader       Config handle for library and services
 *
 * @retval      TRUE            Warm Reset
 * @retval      FALSE           Not Warm Reset
 *
 */
BOOLEAN
IsWarmReset (
  IN       AMD_CONFIG_PARAMS *StdHeader
  )
{
  UINT8 PostStage;
  WARM_RESET_REQUEST Request;
  BOOLEAN  WarmReset;
  CPU_SPECIFIC_SERVICES *FamilySpecificServices;

  FamilySpecificServices = NULL;

  switch (StdHeader->Func) {
  case AMD_INIT_RESET:
    PostStage = WR_STATE_RESET;
    break;
  case AMD_INIT_EARLY:
    PostStage = WR_STATE_EARLY;
    break;
  case AMD_INIT_POST:
  default:
    PostStage = WR_STATE_POST;
    break;
  }

  GetCpuServicesOfCurrentCore ((CONST CPU_SPECIFIC_SERVICES **)&FamilySpecificServices, StdHeader);
  FamilySpecificServices->GetWarmResetFlag (FamilySpecificServices, StdHeader, &Request);

  if (Request.StateBits >= PostStage) {
    WarmReset = TRUE;
  } else {
    WarmReset = FALSE;
  }

  return WarmReset;
}

/*---------------------------------------------------------------------------------------*/
/**
 *    This function will set the CPU register warm reset bits at AmdInitEarly if it is
 *    currently in cold boot. To request for a warm reset, set the RequestBit to TRUE
 *    and the StateBits to (current poststage - 1)
 *
 *    @param[in] Data      The table data value (unused in this routine)
 *    @param[in] StdHeader Config handle for library and services
 *
 *---------------------------------------------------------------------------------------
 **/
VOID
SetWarmResetAtEarly (
  IN       UINT32            Data,
  IN       AMD_CONFIG_PARAMS *StdHeader
  )
{
  WARM_RESET_REQUEST Request;

  if (!IsWarmReset (StdHeader)) {
    GetWarmResetFlag (StdHeader, &Request);

    Request.RequestBit = TRUE;
    Request.StateBits = (Request.PostStage - 1);

    SetWarmResetFlag (StdHeader, &Request);
  }
}

/*----------------------------------------------------------------------------------------
 *                            L O C A L    F U N C T I O N S
 *----------------------------------------------------------------------------------------
 */