text: /** @file
    Reset System Library functions for coreboot
  
    Copyright (c) 2014 - 2016, Intel Corporation. All rights reserved.<BR>
    This program and the accompanying materials
    are licensed and made available under the terms and conditions of the BSD License
    which accompanies this distribution.  The full text of the license may be found at
    http://opensource.org/licenses/bsd-license.php
  
    THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
    WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  
  **/
  
  #include <PiDxe.h>
  #include <Library/BaseLib.h>
  #include <Library/DebugLib.h>
  #include <Library/IoLib.h>
  #include <Library/HobLib.h>
  
  #include <Guid/AcpiBoardInfoGuid.h>
  
  VOID
  AcpiPmControl (
    UINTN SuspendType
    )
  {
  	EFI_HOB_GUID_TYPE  *GuidHob;
  	ACPI_BOARD_INFO    *pAcpiBoardInfo;	
  	UINTN PmCtrlReg = 0;
  	
    ASSERT (SuspendType <= 7);  
    //
  	// Find the acpi board information guid hob
  	//
  	GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  	ASSERT (GuidHob != NULL);
    pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob); 
    
    PmCtrlReg = (UINTN)pAcpiBoardInfo->PmCtrlRegBase; 
    IoAndThenOr16 (PmCtrlReg, (UINT16) ~0x3c00, (UINT16) (SuspendType << 10));
    IoOr16 (PmCtrlReg, BIT13);
    CpuDeadLoop ();
  }
  
  /**
    Calling this function causes a system-wide reset. This sets
    all circuitry within the system to its initial state. This type of reset
    is asynchronous to system operation and operates without regard to
    cycle boundaries.
  
    System reset should not return, if it returns, it means the system does
    not support cold reset.
  **/
  VOID
  EFIAPI
  ResetCold (
    VOID
    )
  {
    EFI_HOB_GUID_TYPE  *GuidHob;
  	ACPI_BOARD_INFO    *pAcpiBoardInfo;	
  		
  	//
  	// Find the acpi board information guid hob
  	//
  	GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  	ASSERT (GuidHob != NULL);
    pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob); 
  	
    IoWrite8 ((UINTN)pAcpiBoardInfo->ResetRegAddress, pAcpiBoardInfo->ResetValue);
    CpuDeadLoop ();
  }
  
  /**
    Calling this function causes a system-wide initialization. The processors
    are set to their initial state, and pending cycles are not corrupted.
  
    System reset should not return, if it returns, it means the system does
    not support warm reset.
  **/
  VOID
  EFIAPI
  ResetWarm (
    VOID
    )
  {
  	EFI_HOB_GUID_TYPE  *GuidHob;
  	ACPI_BOARD_INFO    *pAcpiBoardInfo;	
  		
  	//
  	// Find the acpi board information guid hob
  	//
  	GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  	ASSERT (GuidHob != NULL);
    pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob); 
  	
    IoWrite8 ((UINTN)pAcpiBoardInfo->ResetRegAddress, pAcpiBoardInfo->ResetValue);
    CpuDeadLoop ();
  }
  
  /**
    Calling this function causes the system to enter a power state equivalent
    to the ACPI G2/S5 or G3 states.
  
    System shutdown should not return, if it returns, it means the system does
    not support shut down reset.
  **/
  VOID
  EFIAPI
  ResetShutdown (
    VOID
    )
  {
    EFI_HOB_GUID_TYPE  *GuidHob;
    ACPI_BOARD_INFO    *pAcpiBoardInfo;
    UINTN              PmCtrlReg;
  
    //
    // Find the acpi board information guid hob
    //
    GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
    ASSERT (GuidHob != NULL);
    pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob); 
    
    //
    // GPE0_EN should be disabled to avoid any GPI waking up the system from S5
    //
    IoWrite16 ((UINTN)pAcpiBoardInfo->PmGpeEnBase,  0);
  
    //
    // Clear Power Button Status
    //
    IoWrite16((UINTN) pAcpiBoardInfo->PmEvtBase, BIT8);
    
    //
    // Transform system into S5 sleep state
    //
    PmCtrlReg = (UINTN)pAcpiBoardInfo->PmCtrlRegBase; 
    IoAndThenOr16 (PmCtrlReg, (UINT16) ~0x3c00, (UINT16) (7 << 10));
    IoOr16 (PmCtrlReg, BIT13);
    CpuDeadLoop ();
  
    ASSERT (FALSE);
  }
  
  /**
    Calling this function causes the system to enter a power state for capsule
    update.
  
    Reset update should not return, if it returns, it means the system does
    not support capsule update.
  
  **/
  VOID
  EFIAPI
  EnterS3WithImmediateWake (
    VOID
    )
  {
    AcpiPmControl (5);
    ASSERT (FALSE);
  }
  
  /**
    This function causes a systemwide reset. The exact type of the reset is
    defined by the EFI_GUID that follows the Null-terminated Unicode string passed
    into ResetData. If the platform does not recognize the EFI_GUID in ResetData
    the platform must pick a supported reset type to perform.The platform may
    optionally log the parameters from any non-normal reset that occurs.
  
    @param[in]  DataSize   The size, in bytes, of ResetData.
    @param[in]  ResetData  The data buffer starts with a Null-terminated string,
                           followed by the EFI_GUID.
  **/
  VOID
  EFIAPI
  ResetPlatformSpecific (
    IN UINTN   DataSize,
    IN VOID    *ResetData
    )
  {
    ResetCold ();
  }
  