path: root/Core/EM/HddSecurity/IdeSecurity.c

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// $Header: /Alaska/SOURCE/Modules/HddSecurity/IdeSecurity.c 43    4/22/15 3:57a Anbuprakashp $
//
// $Revision: 43 $
//
// $Date: 4/22/15 3:57a $
//**********************************************************************
// Revision History
// ----------------
// $Log: /Alaska/SOURCE/Modules/HddSecurity/IdeSecurity.c $
// 
// 43    4/22/15 3:57a Anbuprakashp
// [TAG]  		EIP212319
// [Category]  	Bug Fix
// [Severity]  	Normal
// [Symptom]  	System hang while SW_SMI_AHCI_LOCATE_AHCI_SMM SMI trigger
// after enable SmmChkEn bit
// [RootCause]  	Bootservice call used inside IdeSmm driver which causes
// the Exception
// [Solution]  	Changes made not to use BootService calls inside IdeSmm
// driver
// [Files]  		IdeSecurity.h
// IdeSecurity.c
// IDESMM.c
// 
// 42    3/16/15 5:50a Rameshr
// [TAG]  		EIP208331
// [Category]  	Improvement
// [Description]  	Avoid sending freeze Lock command to the device if the
// HDD already in frozen state
// [Files]  		IdeSecurity.c, HddPassword.c
// 
// 41    6/09/14 9:30a Anbuprakashp
// [TAG]  		EIP172445
// [Category]  	Improvement
// [Description]  	Runtime attribute set for the some of the variable used
// by Aptio-4 HddSecurity driver and needs to be reviewed
// [Files]  		IdeSecurity.c
// 
// 40    4/07/14 2:39a Nimishsv
// [TAG]  		EIP151848
// [Category]  	Improvement
// [Description]  	[HDD security]Clear HDD security data related variable
// when secuirty disabled
// [Files]  		IdeSecurity.c
// 
// 39    3/25/14 6:21a Rameshr
// [TAG]  		EIP160499
// [Category]  	Improvement
// [Description]  	Do not get HDD password variable if HDD is in lock
// state
// [Files]  		IdeSecurity.c
// 
// 38    3/25/14 6:12a Rameshr
// [TAG]  		EIP124591
// [Category]  	Improvement
// [Description]  	Before sending the freeze lock command for the HDD,
// check the Hdd security status (locked or unlocked) and if the hdd is
// unlocked state, send the freeze lock command to hdd
// [Files]  		IdeSecurity.c
// 
// 37    12/18/13 4:05a Srikantakumarp
// [TAG]    EIP127356
// [Category]    Improvement
// [Description]    Flash NVRAM seems to cause HDD can't be unlocked when
// S3 resume.
// [Files]    IdeSecurity.c, IDESMM.c, HddPassword.c, AhciBus.c, AhciBus.h
// 
// 36    1/17/12 12:50a Jittenkumarp
// [TAG]  		EIP78432
// [Category]  	Bug Fix
// [Symptom]  	The password set for OEM_MASTER_PASSWORD_TAG token is not
// authenticated when the token SETUP_PASSWORD_NON_CASE_SENSITIVE is set
// to 1.
// [RootCause]  	When SETUP_PASSWORD_NON_CASE_SENSITIVE  token is 1, input
// password is always converted to Uppercase but  OEM_MASTER_PASSWORD_TAG
// is in lower case.
// [Solution]  	OEM_MASTER_PASSWORD_TAG is converted into Uppercase before
// storing in memory.
// [Files]  		IdSecurity.c
// 
// 35    1/05/12 6:25a Anandakrishnanl
// [TAG]  		EIP79637
// [Category]  	Bug Fix
// [Severity]  	Normal
// [Symptom]  	Enhanced Erase Mode not Working
// [RootCause]  	IdeSecurity Module SecurityEraseUnit did not handle Bit1
// of Control Word to identify if it is a normal erase or Enhanced erase
// [Solution]  	[IdeSecurity Module]SIECURITY ERASE UNIT command needs
// Enhanced mode support
// Code changed from Control &= 0x1; // Bit0 is valid to Control &= 0x3;
// // Bit0 and Bit 1 is valid
// to make EnhancedErase functional.
// [Files]  		IdeSecurity.c
// 
// 34    12/19/11 1:06a Rameshr
// [TAG]  		EIP77527
// [Category]  	Improvement
// [Description]  	IdeSecurity, IdeAcoustic and IdeSmart changes should be
// done based on the Core Version checking.
// [Files]  		IdeSecurity.c, IdeSmart.c , Acoustic.c 
// 
// 33    12/05/11 6:24p Rajkumarkc
// [TAG]           EIP77142 
// [Category]    Improvement
// [Description] Added the function 'IdeNonDataCommandExp' in the
// 'IDE_BUS_PROTOCOL' and removed the existing function
// 'IdeNonDataCommand' for supporting the upper 24bits of LBA.
// [Files]
//     Ata.c, IdeBus.c, Idebus.h, PIDEBus.h, Acoustic.c, IdeSecurity.c,
// IdeSMART.c
// 
// 32    10/21/11 4:11a Rameshr
// [TAG]  		EIP69247
// [Category]  	Bug Fix
// [Severity]  	Minor
// [Symptom]  	Several IdeSecurity.sdl tokens are not working properly
// [RootCause]  	Several IdeSecurity.sdl tokens are not working properly
// [Solution]  	Removed unwanted SDL token and verified all the SDL token
// function.
// [Files]  		IdeSecurity.c, IdeSecurity.sdl, IdeSecurity.sdl
// 
// 31    10/21/11 2:22a Rameshr
// [TAG]  		EIP70395
// [Category]  	Bug Fix
// [Severity]  	Minor
// [Symptom]  	When an Empty Master Password string is entered for the
// first time(when no password was installed before), the
// IDEPasswordUpdateHdd returns a  Boolean "TRUE"
// [RootCause]  	SecurityDisablePassword function returns the status of
// SetDefaultMasterPassword function which is EFI_SUCCESS instead of
// returning the status of SecurityCommonRoutine which will fail.
// [Solution]  	SecurityCommonRoutine function status returned as the
// status for SecurityDisablePassword function.
// [Files]  		IdeSecurity.c
// 
// 30    10/11/11 1:54a Rameshr
// [TAG]  		EIP69246
// [Category]  	Improvement
// [Description]  	Made the  SECURITY_SUPPORT as the Master token and
// removed the IdeSecurity_Support token.
// 
// [Files]  		IdeSecurity.c, IdeSecurity.h, IdeSecurity.mak,
// IdeSecurity.sdl
// 
// 29    10/11/11 1:34a Rameshr
// [TAG]  		EIP70918
// [Category]  	Bug Fix
// [Severity]  	Minor
// [Symptom]  	On S3 resume system will throw blue screen error, when HDD
// password is set
// [RootCause]  	Ld assume that the data is UINT64. But the actual data is
// UINT32.
// [Solution]  	To display d should be enough as the DataId is UINT32
// [Files]  		IdeSecurity.c
// 
// 28    4/27/11 6:03a Anandakrishnanl
// [TAG]  		EIP54315 
// [Category]  	Bug Fix
// [Severity]  	Important
// [Symptom]  	SugarBay IdeSecurity increase S3 Resume time
// [RootCause]  	Setting the MASTER_PASSWORD_ENABLE sdl token in Ide
// security Module saves the password in Smm all the time in reboots. This
// causes the system to ask for master password even when it is not locked
// which causes Long Timeout in S3 resume.
// [Solution]  	Fix by not saving the master pasword in SMM at  the time
// of Set password. Only Unlock password will save validated password in
// SMM area.
// [Files]  		IdeSecurity.c
// 
// 27    4/06/11 12:52a Rameshr
// [TAG]- EIP 57341
// [Category]-IMPROVEMENT
// [Description]- Added Support for SMM PI 1.1 in HDDSecurity eModule.
// [Files]- IdeSecurity.c , IdeSecurity.h, IdeSecurity.dxs 
// 
// 26    12/03/10 12:23a Rameshr
// [TAG] - EIP 48770
// [Category]- BUG FIX
// [Severity]- Minor
// [Symptom] - HddSecurity build error when disable the IDEBUS module..
// [RootCause]- IdebusLib used with IdeSecurity Module.
// [Solution] - Removed IdebusLib usage from source and mak file.
// [Files] - Idesecurity.c, IdeSecurity.mak
// 
// 25    10/20/10 2:49a Rameshr
// [TAG]- EIP 43492
// [Category]-IMPROVEMENT
// [Description]- Added the INTEL_IDE_PROTOCOL also to support old Core
// and drivers.
// [Files]- IdeSecurity.c
// 
// 24    10/11/10 6:36p Krishnakumarg
// [TAG] - EIP 44603
// [Category] - Enhancement
// [Severity] - Minor
// [Symptom]  - No Hdd Password in Nvram once enable
// FORCE_HDD_PASSWORD_PROMPT
// [RootCause]- Password not stored in NVRAM on enabling the
// FORCE_HDD_PASSWORD_PROMPT token.
// [Solution] - Password will be stored in nvram based on
// HDD_PASSWORD_ON_NVRAM token.
// [Files] - IdeSecurity.c, IdeSecurity.sdl
// 
// 23    10/11/10 10:59a Krishnakumarg
// [TAG]- EIP 43249
// [Category]-IMPROVEMENT
// [Description]- Non-Ascii character in comments causing build problem in
// japanese XP
// [Files]- IdeSecurity.c,IDESMM.c, InstallIdeSmi, Ata.c, Atapi.c,
// IDEBusComponentName.c, IdeBusMaster.c, IdeHPA.c, IdePowerManagement.c
// 
// 22    9/13/10 1:37a Rameshr
// [TAG]- EIP 43299
// [Category]-IMPROVEMENT
// [Description]- About IdeSecurity module. It use soft smi port 0xb2
// directly.It will need to re-modify on all of AMD project.
//                1) Added the SDL token for Sw SMI port address.
//                2) Used Pciio protocol to get the device location and
// passed this information to SMM driver.
// [Files]- IdeSecurity.c, IdeSmm.c, PideBus.h
// 
// 21    9/13/10 1:31a Rameshr
// [TAG]- EIP 43492
// [Category]-IMPROVEMENT
// [Description]- Change the INTEL_IDE_PROTOCOL into EFI_IDE_PROTOCOL in
// IdeSecurity.c 
// [Files]- IdeSecurity.c
// 
// 20    6/07/10 7:18p Krishnakumarg
// Build error in "4.6.3_HddSecurity_011" label.EIP#39531
// 
// 19    5/06/10 4:39p Yul
// Refer to EIP 37975 IdeSecurity related fixes.
// 
// 18    2/19/10 12:47p Yul
// Delete the comment out codes
// 
// 17    1/21/10 12:06p Yul
// Refer to EIP 33848.
// LegacyBios protocol is not needed here.
// 
// 16    1/15/10 10:20a Yul
// Coding Standard
//
// 15    12/22/09 3:22p Krishnakumarg
// Update for chm file. Added some more comments in function headers
//
// 14    12/09/09 12:17p Krishnakumarg
// EIP 31797 : IDE Security API documentation. Added comments whereever
// possible and modified files for coding standard
//
// 13    11/25/09 6:02p Krishnakumarg
// Updated the file with comments to comply with AMI coding standard.
//
// 12    10/14/09 12:49p Krishnakumarg
// CloseEvent funtion used instead of a static variable in callback
// routines - EIP 27065
//
// 11    7/09/09 4:52p Fasihm
// Update Identify Data before checking the Security Status of the Hard
// Disk.
//
// 10    4/28/09 6:52p Rameshr
// HDD password support in RAID mode
// EIP:20421
//
// 9     3/31/09 7:02p Davidd
// Added FORCE_HDD_PASSWORD_PROMPT token and Device Configuration Freeze
// Lock programming.
//
// 8     3/29/09 11:11a Rameshr
// Security Erase command timeout value should be from the Identify packet
// command word 89. Added code in Ahci and IDE drivers. So removed the
// Extra timeout checking code from here.
// EIP 20630
//
// 7     3/18/09 11:24a Fredericko
// EIP19618 removed dependency on foundation.lib
//
// 6     3/13/09 3:41p Fredericko
//
// 1     10/17/08 7:28p Fasihm
// This is the Initial check-in for the complete AMI Aptio source for the
// Calpella Crb platform based on Clarksfield and Ibex Peak - M chipsets.
//
// 5     9/15/08 9:01p Rameshraju
// Password Buffer is cleard before saving the password.
//
// 4     4/11/08 4:24p Rameshraju
// 1)Enter the Emptry string for the master password, will set the default
// OEM password and in setup password status will be not installed.
// 2)If the revision code is not 0, then SecuritySetPassword will use
// revision code from the input parameters.
// 3)HddSecutiyData Nvram variable master password cleared when we set
// user password and user password cleared when we set master password.
// 4)When we disable the password, HddSecutiyData Nvram variable also
// updated properly.
// 5)Password lenght stored in HddSecData structure.
//
// 3     4/09/08 4:22p Rameshraju
// Build error resolved when the MASTER_PASSWORD_ENABLED.
//
// 2     10/03/08 6:47p Anandakrishnanl
// Removed FreezeLock related code from SMI for improving the S3 resume
// time.
//
// 1     28/02/08 6:40p Anandakrishnanl
// Created new HddSecurity module.  Isolated IdeSecurity and IdeSmm from
// IdeBus driver to be compatable with the AHCI Bus driver.
//
// 15    10/23/07 4:17p Felixp
// IDE Security support moved from Sources to Binary
//
// 14    9/25/07 3:24p Rameshraju
// Set the OEM default master password when the HDD is in unlocked and Not
// Frozen State
//
// 13    14/08/07 1:57p Anandakrishnanl
// Changes made for:
//     1.  Prompt for current password inside setup.
//     2.  Display HardDisk Security Status information.
//     3.  Master Password Verification Logic modified.
//     4.  Added Password install status in ReturnIdePasswordFlags
// protocol function.
//
// 12    22/06/07 12:40p Anandakrishnanl
// HardDisk Security Support Module Added.
// Need ACPI Module and SB Module and under Core\Include we updated
// Setup.h.
// Also New IdeBus bin module.
//
// 11    13/04/07 3:05p Anandakrishnanl
// Ide Bus Module - Update source files to comply with AMI coding
// standard"!!!
//
// 10    12/20/06 1:25p Felixp
// Warning fixed
//
// 9     12/18/06 11:59a Srinin
// Moved CreateReadytoBootEvent little later so that Ide Controller is
// restored first before HDD is unlocked during S3 Resume.
//
// 8     11/17/06 3:41p Ambikas
//
// 7     10/12/06 9:42a Felixp
// UEFI2.0 compliance: use CreateReadyToBootEvent instead of CreateEvent
//
// 6     3/21/06 4:47p Srinin
// Build error fixed.
//
// 5     3/13/06 2:21a Felixp
//
// 4     1/09/06 11:36a Felixp
//
// 2     12/14/05 3:09p Srinin
// HDD password unlock during S3 resume support added.
//
// 1     12/01/05 9:43a Felixp
//
// 6     3/04/05 11:35a Mandal
//
// 5     1/18/05 3:22p Felixp
// PrintDebugMessage renamed to Trace
//
// 3     1/13/05 4:25p Srinin
// Procedure names modified.
//
// 2     1/10/05 11:31a Srinin
// IDESecurity Interface changed.
//
// 1     1/05/05 11:22a Srinin
// IDE Password Support added.
//
//
//<AMI_FHDR_START>
//---------------------------------------------------------------------------
//
// Name: IDESecurityServices.c
//
// Description:	IDE Security Support
//
//---------------------------------------------------------------------------
//<AMI_FHDR_END>

#include "IdeSecurity.h"



static EFI_GUID                    gHddSecurityInitProtocolGuid
    = HDD_SECURITY_INIT_PROTOCOL_GUID;
static EFI_GUID                    gEfiBootScriptSaveGuid
    = EFI_BOOT_SCRIPT_SAVE_GUID;
static EFI_GUID                    gIdeSecurityPwNvguid
    = IDE_SECURITY_PWNV_GUID;
static EFI_GUID                    gSecurityModeProtocolGuid
    = IDE_SECURITY_INTERFACE_GUID;
static EFI_GUID                    gEfiBlockIoProtocolGuid
    = EFI_BLOCK_IO_PROTOCOL_GUID;

extern EFI_DRIVER_BINDING_PROTOCOL gIdeBusDriverBinding;
extern EFI_EVENT                   gIDEBusEvtMiscSmmFeatures;
EFI_EVENT                          BootEvent = NULL;
EFI_EVENT                          gIDEBusEvtBootScript = NULL;

const CHAR16                       *sOemMasterPasswordTag
    = CONVERT_TO_WSTRING( OEM_MASTER_PASSWORD_TAG );
const CHAR16                       *sDefaultMasterPasswordTag
    = CONVERT_TO_WSTRING( DEFAULT_MASTER_PASSWORD_TAG );

#if defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x0001000A)
EFI_SMM_CONTROL2_PROTOCOL   *mSmmCtl=NULL;
#else
EFI_SMM_CONTROL_PROTOCOL    *mSmmCtl=NULL;
#endif

HDD_PASSWORD                    *gHDDPasswordBuffer = NULL;
EFI_SMM_COMMUNICATION_PROTOCOL  *gSmmCommunication = NULL;

#ifdef  SW_SMI_IO_ADDRESS
UINT8   SwSmiPort=SW_SMI_IO_ADDRESS;
#else
//
// Default Sw Smi port 
//
UINT8   SwSmiPort=0xB2;
#endif

EFI_STATUS
HDDPortReset(
    IN VOID     *BusInterface,
    IN BOOLEAN   ModeFlag
);


//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   InstallSecurityInterface
//
// Description: Checks whether the device supports Security mode or not.
//              If yes, installs SecurityProtocol.
//
// Input:
//      IN VOID             *BusInterface,
//      IN BOOLEAN          ModeFlag
//
// Output:
//  EFI_SUCCESS                      : Security Mode supported.
//  EFI_DEVICE_ERROR/EFI_UNSUPPORTED : Not supported.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS InstallSecurityInterface(
    IN VOID    *BusInterface,
    IN BOOLEAN ModeFlag )
{
    EFI_STATUS            Status;
    SECURITY_PROTOCOL     *IdeSecurityInterface;
    EFI_HANDLE            IdeDeviceHandle;
    IDENTIFY_DATA         IdentifyData;

    #if MASTER_PASSWORD_ENABLE
    UINT32                IdePasswordFlags = 0;
    #endif

    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;
    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    if ( ModeFlag == FALSE )
    {
        IdentifyData    = IdeBusInterface->IdeDevice.IdentifyData;
        IdeDeviceHandle = IdeBusInterface->IdeDeviceHandle;
    }
    else {
        IdentifyData    = SataDevInterface->IdentifyData;
        IdeDeviceHandle = SataDevInterface->IdeDeviceHandle;
    }

    if ((IdentifyData.Command_Set_Supported_82 & 0x2)  == 0 )
    {
        return EFI_UNSUPPORTED;
    }

    Status = pBS->AllocatePool( EfiBootServicesData,
                                sizeof(SECURITY_PROTOCOL),
                                (VOID**)&IdeSecurityInterface );

    if ( EFI_ERROR( Status ))
    {
        return Status;
    }

    //
    // gHDDPasswordBuffer is allocated only once. The same buffer will be used for all devices.
    //
    if ( gHDDPasswordBuffer == NULL )
    {
        Status = pBS->AllocatePool( EfiBootServicesData,
                                    sizeof(HDD_PASSWORD),
                                    (VOID**)&gHDDPasswordBuffer );

        if ( EFI_ERROR( Status ))
        {
            return Status;
        }
    }

    if ( ModeFlag == FALSE )
    {
        IdeBusInterface->IdeSecurityInterface = IdeSecurityInterface;
        IdeSecurityInterface->BusInterface    = IdeBusInterface;
    }
    else {
        SataDevInterface->IdeSecurityInterface = IdeSecurityInterface;
        IdeSecurityInterface->BusInterface     = SataDevInterface;
    }

    IdeSecurityInterface->ReturnSecurityStatus    = ReturnSecurityStatus;
    IdeSecurityInterface->SecuritySetPassword     = SecuritySetPassword;
    IdeSecurityInterface->SecurityUnlockPassword  = SecurityUnlockPassword;
    IdeSecurityInterface->SecurityDisablePassword = SecurityDisablePassword;
    IdeSecurityInterface->SecurityFreezeLock      = SecurityFreezeLock;
    IdeSecurityInterface->SecurityEraseUnit       = SecurityEraseUnit;
    IdeSecurityInterface->ReturnIdePasswordFlags  = ReturnIdePasswordFlags;
    IdeSecurityInterface->pHDDPasswordBuffer      = gHDDPasswordBuffer;

    //
    // Set ModeFlag to FALSE if IdeBus else TRUE for Ahci Bus.
    //
    IdeSecurityInterface->ModeFlag = ModeFlag;  // Ide Bus

    //
    //  Install the protocol on the device
    //
    Status = pBS->InstallMultipleProtocolInterfaces(
        &IdeDeviceHandle,
        &gSecurityModeProtocolGuid, IdeSecurityInterface,
        NULL );

    if ( gIDEBusEvtBootScript == NULL )
    {
        //
        // Create event for boot script
        //
        Status = CreateReadyToBootEvent(
            TPL_CALLBACK,
            IdeBusCallbackBootScript,
            NULL,
            &gIDEBusEvtBootScript
            );
        ASSERT_EFI_ERROR( Status );
    }

    //
    // Install the Readytoboot event to locate the AhciSMM protocol interface for IdeSmm driver.
    // AhciSmm protocol is valid only on AHCI mode. Other mode Callback is not needed
    //
    if ((BootEvent == NULL) && (ModeFlag))
    {

        // Send data to SMM.
        Status = pBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &gSmmCommunication);
        if (EFI_ERROR(Status)) {
            gSmmCommunication=NULL;
        }

        //
        // Create event for boot script
        //
        Status = CreateReadyToBootEvent(
            TPL_CALLBACK,
            LocateAhciSmmServiceEvent,
            NULL,
            &BootEvent
            );
        ASSERT_EFI_ERROR( Status );
    }

    #if MASTER_PASSWORD_ENABLE
    //
    // Check if OEM_DEFAULT_MASTER_PASSWORD is enabled and
    // DISPLAY_MASTER_PASSWORD is Disabled
    //
    Status = ReturnIdePasswordFlags(
        (IDE_SECURITY_PROTOCOL*)IdeSecurityInterface,
        &IdePasswordFlags
        );

    ASSERT_EFI_ERROR( Status );

    if ((IdePasswordFlags & 0x0800) && (!(IdePasswordFlags & 0x0008)))
    {
        Status = OEMSetMasterPassword(
            (IDE_SECURITY_PROTOCOL*)IdeSecurityInterface );
        ASSERT_EFI_ERROR( Status );
    }
    #endif

    return EFI_SUCCESS;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   StopSecurityModeSupport
//
// Description: Stops the security mode support by uninstalling the
//              security interface.
//
// Input:
//      IN VOID             *BusInterface,
//      IN BOOLEAN          ModeFlag
//
// Output:
//  EFI_SUCCESS         : Security Mode supported
//  EFI_DEVICE_ERROR    : Not supported
//
// Referrals: ReturnSecurityStatus
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS StopSecurityModeSupport(
    IN VOID    *BusInterface,
    IN BOOLEAN ModeFlag )
{
    EFI_STATUS            Status;
    EFI_HANDLE            IdeDeviceHandle;
    SECURITY_PROTOCOL     *IdeSecurityInterface;
    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    if ( ModeFlag == FALSE )
    {
        IdeSecurityInterface = IdeBusInterface->IdeSecurityInterface;
        IdeDeviceHandle      = IdeBusInterface->IdeDeviceHandle;
    }
    else {
        IdeSecurityInterface = SataDevInterface->IdeSecurityInterface;
        IdeDeviceHandle      = SataDevInterface->IdeDeviceHandle;
    }

    if ( IdeSecurityInterface == NULL )
    {
        return EFI_SUCCESS;
    }

    //
    //  Install Devicepath and BLOCK_IO on a new handle
    //
    Status = pBS->UninstallMultipleProtocolInterfaces(
        IdeDeviceHandle,
        &gSecurityModeProtocolGuid,
        IdeSecurityInterface,
        NULL );

    if ( Status == EFI_SUCCESS )
    {
        pBS->FreePool( IdeSecurityInterface );
        IdeSecurityInterface = NULL;
    }

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   IdeBusCallbackBootScript
//
// Description: Saves the IDE registers in a boot script.
//
// Input:
//      IN EFI_EVENT    Event
//      IN VOID         *Context
//
// Output:
//      None
//
// Referrals: SmmHDDPasswordInterface
//
// Notes: Will be called only if HDD loses power in S3 state. A SW SMI will
//        be created during S3 resume, to unlock the HDD and put it in
//        Freeze state.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
VOID IdeBusCallbackBootScript(
    IN EFI_EVENT Event,
    IN VOID      *Context )
{
    EFI_BOOT_SCRIPT_SAVE_PROTOCOL *BootScriptSave;
    EFI_STATUS                    Status;
    UINT8                         Value = SW_SMI_HDD_UNLOCK_PASSWORD;


    Status = pBS->LocateProtocol(
        &gEfiBootScriptSaveGuid,
        NULL,
        &BootScriptSave
        );

    if ( EFI_ERROR( Status ))
    {
        return;
    }

    BOOT_SCRIPT_S3_IO_WRITE_MACRO(
        BootScriptSave,
        EfiBootScriptWidthUint8,
        SwSmiPort,
        1,
        &Value
        );

    //
    //Kill the Event
    //
    pBS->CloseEvent( Event );
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   IdeBusMiscSmmFeatureCallback
//
// Description: Saves the IDE registers in a boot script.
//
// Input:
//      IN EFI_EVENT    Event
//      IN VOID         *Context
//
// Output:
//      None
//
// Referrals: SmmHDDPasswordInterface
//
// Notes: Will be called only if HDD is in AHCI Mode or SWSP is Disabled
//        A SW SMI will be created during S3 resume, to Freeze the HDD in AHCI
//        or Disable SWSP command through Set feature command is Issued.
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

VOID IdeBusMiscSmmFeatureCallback(
    IN EFI_EVENT Event,
    IN VOID      *Context )
{
    EFI_BOOT_SCRIPT_SAVE_PROTOCOL *BootScriptSave;
    EFI_STATUS                    Status;
    UINT8                         Value = SW_SMI_HDD_MISC_SMM_FEATURES;

    static BOOLEAN                S3DataSaved = FALSE;

    if ( S3DataSaved )
    {
        return;
    }

    Status = pBS->LocateProtocol(
        &gEfiBootScriptSaveGuid,
        NULL,
        &BootScriptSave
        );

    if ( EFI_ERROR( Status ))
    {
        return;
    }

    BOOT_SCRIPT_S3_IO_WRITE_MACRO(
        BootScriptSave,
        EfiBootScriptWidthUint8,
        SwSmiPort,
        1,
        &Value
        );

    S3DataSaved = TRUE;
}

//<AMI_PHDR_START>
//----------------------------------------------------------------------------
// Procedure:   IdeSecurityEntryPoint
//
// Description: This function is the entry point for IDE SECURITY Driver.
//
// Input:
//  EFI_HANDLE          ImageHandle     Image handle.
//  EFI_SYSTEM_TABLE    *SystemTable    Pointer to the EFI system table.
//
// Output:
//  EFI_SUCCESS         Security interface installed.
//  EFI_ERROR           Security interface not installed or unable to locate
//                      some protocol.
//
// Notes:
//  Entry Points are used to locate or install protocol interfaces and
//  notification events.
//
//----------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS IdeSecurityEntryPoint(
    IN EFI_HANDLE       ImageHandle,
    IN EFI_SYSTEM_TABLE *SystemTable )
{
    EFI_HANDLE Handle = NULL;
    EFI_STATUS Status;

    InitAmiLib( ImageHandle, SystemTable );

    Status = pBS->AllocatePool( EfiBootServicesData,
                                sizeof(HDD_SECURITY_INIT_PROTOCOL),
                                (VOID**)&gHddSecurityInitProtocol );

    if ( EFI_ERROR( Status ))
    {
        return Status;
    }

#if defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x0001000A)
    Status = pBS->LocateProtocol(&gEfiSmmControl2ProtocolGuid, NULL, &mSmmCtl);
#else
    Status = pBS->LocateProtocol(&gEfiSmmControlProtocolGuid, NULL, &mSmmCtl);
#endif

    if ( EFI_ERROR( Status )) {
        return EFI_UNSUPPORTED;
    }

    gHddSecurityInitProtocol->InstallSecurityInterface
        = InstallSecurityInterface;
    gHddSecurityInitProtocol->StopSecurityModeSupport
        = StopSecurityModeSupport;

    Status = pBS->InstallProtocolInterface(
        &Handle,
        &gHddSecurityInitProtocolGuid,
        EFI_NATIVE_INTERFACE,
        gHddSecurityInitProtocol
        );
    ASSERT_EFI_ERROR( Status );

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   ReturnSecurityStatus
//
// Description: Returns whether the Device supports Security Mode or not.
//              If supported, the current status of the device is returned.
//              Security status information will be retrieved from buffer
//              updated by IDENTIFY DEVICE(Command Code : 0xEC) command.
// Input:
//      IN IDE_SECURITY_PROTOCOL        *This,
//      UINT16                          *SecurityStatus
//
// Output:
//      EFI_SUCCESS                     : Security Mode supported
//      EFI_UNSUPPORTED                 : Not supported
//
//      UINT16                          *SecurityStatus
//                                      Bit 0 : Security Supported
//                                      Bit 1 : Security Enabled
//                                      Bit 2 : Security Locked
//                                      Bit 3 : Security Frozen
//                                      Bit 4 : Security Count Expired
//                                      Bit 5 : Enhanced Security Erase supported
//                                      Bit 6 : Enhanced Security Erase supported
//                                      Bit 8 : Security Level 0:High, 1:Maximum
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS ReturnSecurityStatus(
    IN IDE_SECURITY_PROTOCOL *This,
    UINT16                   *SecurityStatus )
{
    EFI_STATUS            Status = EFI_UNSUPPORTED;
    IDENTIFY_DATA         IdentifyData;
    VOID                  *BusInterface
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN               ModeFlag = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    if ( ModeFlag == FALSE )
    {
        IdentifyData = IdeBusInterface->IdeDevice.IdentifyData;
    }
    else {
        IdentifyData = SataDevInterface->IdentifyData;
    }

    //
    //  Check if Word 82 Bit 1 is set
    //
    if ( IdentifyData.Command_Set_Supported_82 & 0x2 )
    {
        Status          = EFI_SUCCESS;
        *SecurityStatus = IdentifyData.Security_Status_128;
    }

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SecuritySetPassword
//
// Description: Sets User/Master Password using SECURITY_SET_PASSWORD
//              (Commnd Code : 0xF1) security command.
//
// Input:
//      IN IDE_SECURITY_PROTOCOL        *This,
//      UINT16                          Control,
//      UINT8                           *Buffer (32 Bytes)
//      UINT8                           RevisionCode (Valid when Control
//                                       Bit 0 = 1 of Master Password)
//
//  Control : Bit 0 : 0/1 User/Master Password
//            Bit 8 : 0/1 High/Maximum Security level
//
// Output:
//  EFI_SUCCESS     : Password set.
//  EFI_ERROR	    : Error in setting Password.
//
// Notes:
//  1. Buffer should be 32 bytes long (Mandatory). Even if Password is not 32
//     bytes long,pad it with zeros to create a buffer of 32 bytes.
//  2. If a MasterPassword with a valid Revision code(0x0001 through 0xFFFE)
//     already exists, a new MasterPassword with a different revisioncode
//     cannot be installed.MasterPassword needs to be unlocked, disabled and
//     then a new password can be installed.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS SecuritySetPassword(
    IN IDE_SECURITY_PROTOCOL *This,
    UINT16                   Control,
    UINT8                    *Buffer,
    UINT16                   RevisionCode )
{
    EFI_STATUS            Status;

    #if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
    UINT32                HddDataId  = 0;
    UINT16                UserMaster = 0;
    #endif
    UINT16                Temp = 1;

    VOID                  *BusInterface
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN               ModeFlag = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    IDENTIFY_DATA         IdentifyData;
    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    Control &= 0x0101;          // Bit0 and Bit 8 are valid

    //
    //  Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    if ( ModeFlag == FALSE )
    {
        IdentifyData = IdeBusInterface->IdeDevice.IdentifyData;
    }
    else {
        IdentifyData = SataDevInterface->IdentifyData;
    }

    if ((Control & 1) && (RevisionCode == 0))
    {
        RevisionCode = DEFAULT_MASTER_PASSWORD_REVISION;

        #if MASTER_PASSWORD_REVISION_SWITCH == 1
        RevisionCode = CHANGED_MASTER_PASSWORD_REVISION;
        #endif

        #if MASTER_PASSWORD_REVISION_SWITCH == 2
        Temp = (IdentifyData.Master_Password_Rev_92)++;

        if ((Temp == 0) || (Temp == 0xFFFF))
        {
            Temp++;

            if ( Temp == 0xFFFF )
            {
                Temp++;
            }
        }
        RevisionCode = Temp;
        #endif

        if ( RevisionCode == DISABLED_MASTER_PASSWORD_REVISION )
        {
            RevisionCode++;

            if ((RevisionCode == 0) || (RevisionCode == 0xFFFF))
            {
                RevisionCode++;

                if ( RevisionCode == 0xFFFF )
                {
                    RevisionCode++;
                }
            }
        }
    }

    Status = SecurityCommonRoutine(
        BusInterface,
        Control,
        Buffer,
        SECURITY_SET_PASSWORD,
        RevisionCode,
        ModeFlag
        );

    //
    //  Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    //
    //  If Password is set successfully, save it.
    //
    if ( !EFI_ERROR( Status ))
    {
		if(!(Control & 1)) {
	        SmmHDDPasswordInterface( This,
                                 	Control,
                                 	Buffer,
                                 	SW_SMI_HDD_PASSWORD_SAVE );
		}

        #if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
        Status = GatherIdeInfo( BusInterface, ModeFlag, &HddDataId );
        ASSERT_EFI_ERROR( Status );

        Status = SetHddSecDataInNvram( BusInterface,
                                       &HddDataId,
                                       Control,
                                       Buffer );
        ASSERT_EFI_ERROR( Status );
        #endif
    }

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SecurityUnlockPassword
//
// Description: Unlocks the devices for media access using
//              SECURITY_UNLOCK(Command Code : 0xF2) security command.
//
// Input:
//      IN IDE_SECURITY_PROTOCOL        *This,
//      UINT16                          Control,
//      UINT8                           *Buffer (32 Bytes).
//
//      Control : Bit 0 : 0/1 User/Master Password
//      Buffer  : Pointer to password buffer which will be used to unlock the
//                drive.
//
// Output:
//  EFI_SUCCESS         : Hard disk is unlocked.
//  EFI_DEVICE_ERROR    : Failed to unlock the drive.
//
// Notes:
//  1. Buffer should be 32 bytes long (Mandatory). Even if Password is not
//     32 bytes long, pad it with zeros to create a buffer of 32 bytes.
//  2. If the password compare fails then the device returns command aborted
//     to the host and decrements the unlock counter. This counter is initially
//     set to five and is decremented for each password mismatch when SECURITY
//     UNLOCK is issued and the device is locked. When this counter reaches
//     zero then SECURITY UNLOCK and SECURITY ERASE UNIT commands are command
//     aborted until a power-on reset or a hardware reset.SECURITY UNLOCK
//     commands issued when the device is unlocked have no effect on the unlock
//     counter.
//  3. SECURITY_DISABLE_PASSWORD and SECURITY_SET_PASSWORD commands used when
//     security password is set and HDD is in unlocked state. This is done to
//     have consistency of output from this function.
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS SecurityUnlockPassword(
    IN IDE_SECURITY_PROTOCOL *This,
    UINT16                   Control,
    UINT8                    *Buffer )
{
    EFI_STATUS            Status;

    #if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
    UINT32                HddDataId  = 0;
    UINT16                UserMaster = 0;
    #endif
    UINT16                RevisionCode = 0;
    EFI_STATUS            Status1;
    VOID                  *BusInterface   \
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN               ModeFlag   \
        = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    UINT16                SecurityStatus = 0;
    #if MASTER_PASSWORD_ENABLE
    UINT32                IdePasswordFlags = 0;
    #endif

    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;
    EFI_BLOCK_IO_PROTOCOL *BlockIo;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    //
    // Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    Status = ReturnSecurityStatus( This, &SecurityStatus );

    Control &= 0x1;         // Bit0 is valid
    //
    // When in Setup, Current Password is prompted for consistency when Setting a New Password
    // Or Disabling the Existing Password. Follow a Special Path only in this case.
    //*****This Case Applies on only when (1)Password is Set & Security Enabled
    //                                    (2)Unlocked


    if ((SecurityStatus & BIT01) && (!(SecurityStatus & BIT02)))
    {
        if ( !(Control & 1))
        {
            //
            // (a)For Changing or Clearing User Password.
            //  1.Send a disable Password Command from the String Obtained from user.
            //  2.If Success Set the Password Same Password.
            //  3.Suitable if Logged in as Both User or Master
            //
            Status = SecurityCommonRoutine(
                BusInterface,
                Control,
                Buffer,
                SECURITY_DISABLE_PASSWORD,
                0,
                ModeFlag
                );

            if ( !EFI_ERROR( Status ))
            {
                SecurityCommonRoutine(
                    BusInterface,
                    Control,
                    Buffer,
                    SECURITY_SET_PASSWORD,
                    RevisionCode,
                    ModeFlag
                    );
            }
            return Status;
        }

    }

    Status = SecurityCommonRoutine(
        BusInterface,
        Control,
        Buffer,
        SECURITY_UNLOCK,
        0,
        ModeFlag
        );

    //
    // Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    if ( !EFI_ERROR( Status ))
    {
        //
        // Save the Password if unlocked Successfully.
        //
        SmmHDDPasswordInterface( This,
                                 Control,
                                 Buffer,
                                 SW_SMI_HDD_PASSWORD_SAVE );

        #if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
        Status = GatherIdeInfo( BusInterface, ModeFlag, &HddDataId );
        ASSERT_EFI_ERROR( Status );

        Status = SetHddSecDataInNvram( BusInterface,
                                       &HddDataId,
                                       Control,
                                       Buffer );
        ASSERT_EFI_ERROR( Status );
        #endif

        //
        // After unlock the HDD set the OEM default master password
        // Check if OEM_DEFAULT_MASTER_PASSWORD is enabled and
        // DISPLAY_MASTER_PASSWORD is Disabled.
        //
        #if MASTER_PASSWORD_ENABLE
        Status = ReturnIdePasswordFlags( This, &IdePasswordFlags );
        ASSERT_EFI_ERROR( Status );

        if ((IdePasswordFlags & 0x0800) && (!(IdePasswordFlags & 0x0008)))
        {
            Status = OEMSetMasterPassword( This );
            ASSERT_EFI_ERROR( Status );
        }
        #endif

        if ( ModeFlag == FALSE ) {

            //
            // Check if BlockIO Protocol is already present on this device.
            //
            Status1 = pBS->HandleProtocol(IdeBusInterface->IdeDeviceHandle,
                                          &gEfiBlockIoProtocolGuid,
                                          &BlockIo
                                          );

            //
            // Connect only if BloCkIO protocol is not installed on the device.
            //
            if ( EFI_ERROR( Status1 )) {
                #if EFI_IDE_PROTOCOL || INTEL_IDE_PROTOCOL
                pBS->ConnectController(
                    IdeBusInterface->IdeControllerInterfaceHandle,
                    NULL,
                    NULL,
                    TRUE
                    );
                #else
                pBS->ConnectController(
                    IdeBusInterface->IdeControllerInterface->ControllerHandle,
                    NULL,
                    NULL,
                    TRUE
                    );
                #endif
            }
        }
    }

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SecurityDisablePassword
//
// Description: Disables Password authentification before media access.
//              SECURITY_DISABLE_PASSWORD(Command Code : 0xF6) security
//              command is used to remove the user password.
//
// Input:
//      IN IDE_SECURITY_PROTOCOL        *This,
//      UINT16                          Control,
//      UINT8                           *Buffer (32 Bytes)
//
//  Control : Bit 0 : 0/1 User/Master Password
//
//  Buffer  : Pointer to password buffer which will be used to when sending
//            SECURITY_DISABLE_PASSWORD command.
//
//
// Output:
//  EFI_SUCCESS      : Security mode feature disabled.
//  EFI_DEVICE_ERROR : Security command failed.
//
// Notes:
//  1. Buffer should be 32 bytes long (Mandatory). Even if Password is not
//     32 bytes long,pad it with zeros to create a buffer of 32 bytes.
//  2. Password should be unlocked before disabling it.
//  3. SECURITY_DISABLE_PASSWORD command does not change the Master password
//     that may be reactivated later by setting a User password.
//  4. Normal erase mode is selected, the SECURITY ERASE UNIT command writes
//     binary zeroes to all user data areas.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS SecurityDisablePassword(
    IN IDE_SECURITY_PROTOCOL *This,
    UINT16                   Control,
    UINT8                    *Buffer )
{
    EFI_STATUS Status;
    VOID       *BusInterface   \
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN    ModeFlag  \
        = ((SECURITY_PROTOCOL* )This)->ModeFlag;

    #if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
    UINT32     HddDataId = 0;
    UINT8      EmptyBuffer[IDE_PASSWORD_LENGTH];
    #endif

    Control &= 0x1;             // Bit0 is valid

    #if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
    //
    //Update the Nvram buffer with NULL string.
    //
    pBS->SetMem( EmptyBuffer, IDE_PASSWORD_LENGTH, 0 );

    Status = GatherIdeInfo( BusInterface, ModeFlag, &HddDataId );
    ASSERT_EFI_ERROR( Status );

    Status = SetHddSecDataInNvram( BusInterface, &HddDataId, Control, EmptyBuffer );
    ASSERT_EFI_ERROR( Status );
    #endif

    Status = SecurityCommonRoutine( BusInterface,
                                    Control,
                                    Buffer,
                                    SECURITY_DISABLE_PASSWORD,
                                    0,
                                    ModeFlag
                                    );

    //
    // Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    if ( !EFI_ERROR( Status ))
    {
        SmmHDDPasswordInterface( This,
                                 Control,
                                 Buffer,
                                 SW_SMI_HDD_PASSWORD_REMOVE );
    }

    //
    // If the Empty string entered for the master password, Set the OEM
    // disable password with Disabled revision code.
    //
    if ( Control & 01 )
    {
        EFI_STATUS    DefaultStatus;
        DefaultStatus = SetDefaultMasterPassword( This );
        ASSERT_EFI_ERROR( DefaultStatus );
    }
    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SetDefaultMasterPassword
//
// Description: Sets the Default Password String provided by OEM as
//              Master Password.
//
// Input:
//              IN IDE_SECURITY_PROTOCOL        *This
//
// Output:
//  EFI_SUCCESS : Default master password is set.
//  EFI_ERROR   : Default master password is not set.
//
// Notes:
//  DEFAULT_MASTER_PASSWORD_TAG token string will be set as master password.
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS SetDefaultMasterPassword(
    IN IDE_SECURITY_PROTOCOL *This )
{
    EFI_STATUS Status;
    UINT8      Buffer[IDE_PASSWORD_LENGTH];
    UINT16     Control      = 1;
    UINT16     RevisionCode = DISABLED_MASTER_PASSWORD_REVISION;
    UINTN      i;
    UINT16     SecurityStatus = 0;

    MemSet( &Buffer, IDE_PASSWORD_LENGTH, 0 );

    for ( i = 0; i < IDE_PASSWORD_LENGTH; i++ )
    {
        Buffer[i] = (UINT8)sDefaultMasterPasswordTag[i];

        if ( sDefaultMasterPasswordTag[i] == L'\0' )
        {
            break;
        }
    }
    //
    // Set the OEM master password if the HDD is not in Frozen or locked state.
    //
    Status = ReturnSecurityStatus( This, &SecurityStatus );

    if ( !((SecurityStatus & 0x04) || (SecurityStatus & 0x08)))
    {
        Status = SecuritySetDefaultMasterPassword( This,
                                                   Control,
                                                   Buffer,
                                                   RevisionCode );
    }

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SecuritySetDefaultMasterPassword
//
// Description: Sets default Master Password with disabled revision code.
//              SECURITY_SET_PASSWORD(Command code : 0xF1) security command
//              used to set default master password.
//
// Input:
//      IN IDE_BUS_PROTOCOL             *This,
//      UINT16                          Control,
//      UINT8                           *Buffer (32 Bytes)
//      UINT8                           RevisionCode (Valid when
//                                      Control Bit 0 = 1 of Master Password)
//
//      Control :       Bit 0 : 0/1 User/Master Password
//                      Bit 8 : 0/1 High/Maximum Security level
//
// Output:
//      EFI_SUCCESS : Password set
//      EFI_ERROR   : Error in setting Password
//
// Notes:
//  1. Buffer should be 32 bytes long (Mandatory). Even if Password is not
//     32 bytes long,pad it with zeros to create a buffer of 32 bytes.
//
//  2. If a MasterPassword with a valid Revision code already exists, a new
//     MasterPassword with a different revisioncode cannot be installed.
//     MasterPassword needs to be unlocked, disabled and then a new password
//     can be installed.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS SecuritySetDefaultMasterPassword(
    IN IDE_SECURITY_PROTOCOL *This,
    UINT16                   Control,
    UINT8                    *Buffer,
    UINT16                   RevisionCode )
{
    VOID       *BusInterface = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN    ModeFlag      = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    EFI_STATUS Status;

    #if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
    UINT32     HddDataId  = 0;
    UINT16     UserMaster = 0;
    #endif

    Control &= 0x0101;          // Bit0 and Bit 8 are valid

    //
    // Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    Status = SecurityCommonRoutine(
        BusInterface,
        Control,
        Buffer,
        SECURITY_SET_PASSWORD,
        RevisionCode,
        ModeFlag
        );

    //
    // Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    //
    // If Password is set successfully, save it.
    //
    if ( !EFI_ERROR( Status ))
    {
        SmmHDDPasswordInterface(
            This,
            Control,
            Buffer,
            SW_SMI_HDD_PASSWORD_SAVE
            );

        #if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
        Status = GatherIdeInfo( BusInterface, ModeFlag, &HddDataId );
        ASSERT_EFI_ERROR( Status );

        Status = SetHddSecDataInNvram( BusInterface,
                                       &HddDataId,
                                       Control,
                                       Buffer );
        ASSERT_EFI_ERROR( Status );
        #endif
    }

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SecurityFreezeLock
//
// Description: Prevents any further alteration of security status on the
//              device leaving the hard disk in Frozen mode. Frozen mode is
//              disabled by power-off or hardware reset. SECURITY_FREEZE_LOCK
//              (Command Code : 0xF5)security command is used to freeze hard disk.
//
// Input:
//      IN IDE_SECURITY_PROTOCOL        *This,
//
// Output:
//      EFI_SUCCESS : Hard disk is successdully kept in FROZEN state.
//      EFI_ERROR   : Security Freeze command failed.
//
// Notes:
//  Commands disabled by SECURITY FREEZE LOCK are:
//      - SECURITY SET PASSWORD
//      - SECURITY UNLOCK
//      - SECURITY DISABLE PASSWORD
//      - SECURITY ERASE PREPARE
//      - SECURITY ERASE UNIT
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS SecurityFreezeLock(
    IN IDE_SECURITY_PROTOCOL *This )
{
    EFI_STATUS            Status;
    VOID                  *BusInterface
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN               ModeFlag
        = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    UINT16                SecurityStatus = 0;

    COMMAND_STRUCTURE     CommandStructure;
#if !DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT
    IDENTIFY_DATA         IdentifyData;
#endif
   
    Status=ReturnSecurityStatus( This, &SecurityStatus );
    if(EFI_ERROR(Status)) {
        return Status;
    }

    // Freeze Lock command will not work with the HDD is in Locked State.
    // So return with success if the HDD is locked state or already frozen state 
    if ( SecurityStatus & 0xc ) {
        return EFI_SUCCESS;
    }
    
    ZeroMemory( &CommandStructure, sizeof(COMMAND_STRUCTURE));
    CommandStructure.Command = SECURITY_FREEZE_LOCK;

#if !DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT
    if ( ModeFlag == FALSE ) {
        IdentifyData = ((IDE_BUS_PROTOCOL*)BusInterface)->IdeDevice.IdentifyData;
    } else {
        IdentifyData = ((SATA_DEVICE_INTERFACE*)BusInterface)->IdentifyData;
    }
    if ( SecurityStatus & 2 )
    {
        if ( IdentifyData.Reserved_76_79[3] & 0x0040 )
        {
            Status = TransferPwDataFromNvramToSmram( This );
            ASSERT_EFI_ERROR( Status );
        }
    }
#endif

    Status =  CommonNonDataHook( BusInterface,
                                    CommandStructure,
                                     ModeFlag );
    ASSERT_EFI_ERROR (Status);
    CommandStructure.Features = DEV_CONFIG_FREEZE_LOCK_FEATURES;
    CommandStructure.Command  = DEV_CONFIG_FREEZE_LOCK;
    Status                    = CommonNonDataHook( BusInterface,
                                                   CommandStructure,
                                                   ModeFlag );

    //
    //	Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SecurityEraseUnit
//
// Description: Erases the Device content.SECURITY_ERASE_UNIT
//              (Command code : 0xF4) security command is used for device
//              erasing.
//
// Input:
//      IN IDE_SECURITY_PROTOCOL    *This,
//      UINT16                      Control,
//      UINT8                       *Buffer
//
//      Control :       Bit 0 : 0/1 User/Master Password
//						Bit 1 : 0/1 Normal Erase/ Enhanced Erase
//      Buffer  : Pointer to password buffer which will be used to when sending
//                SECURITY_ERASE_UNIT command.
//
// Output:
//  EFI_SUCCESS      : Successfull completion of Erase command.
//  EFI_DEVICE_ERROR : EraseUnit command failed to complete.
//
// Notes:
//  If a device is locked with USER PASSWORD and Maximum security level set
//  then only way to unlock the device with MASTER password is to erase the
//  contents of the device.
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS SecurityEraseUnit(
    IN IDE_SECURITY_PROTOCOL *This,
    UINT16                   Control,
    UINT8                    *Buffer )
{
    EFI_STATUS        Status;

    VOID              *BusInterface   \
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN           ModeFlag   \
        = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    COMMAND_STRUCTURE CommandStructure;

    ZeroMemory( &CommandStructure, sizeof(COMMAND_STRUCTURE));
    CommandStructure.Command = SECURITY_ERASE_PREPARE;

    Status = CommonNonDataHook( BusInterface, CommandStructure, ModeFlag );

    //
    // Issue Security Erase Unit
    //
    Control &= 0x3;             // Bit0 and Bit 1 is valid
    Status   = SecurityCommonRoutine(
        BusInterface,
        Control,
        Buffer,
        SECURITY_ERASE_UNIT,
        0,
        ModeFlag
        );

    //
    // Update the Identify device buffer
    //
    UpdateIdentifyData( BusInterface, ModeFlag );

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   ReturnIdePasswordFlags
//
// Description: Returns Ide Password Variables and Flags.
//
// Input:
//          IN IDE_SECURITY_PROTOCOL        *This,
//          UINT32                          *IdePasswordFlags
//
// Output:
//  EFI_SUCCESS : IDEPassword Status Flag is returned in IdePasswordFlags.
//  EFI_ERROR   : Error while retrieving the SecurityStatus.
//
//
// Referrals:
//
//  IdePasswordFlags:
// **TBD Only Bit0, Bit03, Bit11, Bit16, Bit17 are Supported Currently
//
//         BIT0                             User Password Support;
//         BIT1                             Master Password Support;
//         BIT2                             Display User Password;
//         BIT3                             Display Master Password;
//         BIT4                             Display User Password Status;
//         BIT5                             Display Master Password Status;
//         BIT6                             Freeze Lock Hdds;
//         BIT7                             Single User Password;
//         BIT8                             Single Master Password;
//         BIT9                             System User Password as Hdd User Password;
//         BIT10                            System Admin Password as Hdd Master Password;
//         BIT11                            OEM Default Master Password
//         BIT12                            Prompt for User Password in Post
//         BIT13                            Prompt for Master Password in Post
//         BIT14                            Display Security Status in Setup
//         BIT15                            DUMMY Security Token.
//         BIT16                            MasterPassword Set Status.
//         BIT17                            UserPassword Set Status.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS ReturnIdePasswordFlags(
    IN IDE_SECURITY_PROTOCOL *This,
    UINT32                   *IdePasswordFlags )
{
    EFI_STATUS            Status         = EFI_SUCCESS;
    UINT32                Temp           = 0;
    UINT16                MasterPwdRev   = 0;
    UINT16                SecurityStatus = 0;
    VOID                  *BusInterface
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN               ModeFlag
        = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    IDENTIFY_DATA         IdentifyData;
    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    if ( ModeFlag == FALSE )
    {
        IdentifyData = IdeBusInterface->IdeDevice.IdentifyData;
    }
    else {
        IdentifyData = SataDevInterface->IdentifyData;
    }



    #if MASTER_PASSWORD_ENABLE
    Temp |= BIT01;
    #endif


    #if DISPLAY_MASTER_PASSWORD
    Temp |= BIT03;
    #endif

    #if OEM_DEFAULT_MASTER_PASSWORD
    Temp |= BIT11;
    #endif


    MasterPwdRev = IdentifyData.Master_Password_Rev_92;

    if ((MasterPwdRev != 0x0000) && (MasterPwdRev != 0xFFFF)    \
        && (MasterPwdRev != DISABLED_MASTER_PASSWORD_REVISION))
    {
        Temp |= BIT16;
    }

    Status = ReturnSecurityStatus( This, &SecurityStatus );

    if ( EFI_ERROR( Status ))
    {
        return Status;
    }

    if ( SecurityStatus & BIT01 )
    {
        Temp |= BIT17;
    }

    *IdePasswordFlags = (UINT32)Temp;
    return EFI_SUCCESS;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:	SecurityCommonRoutine
//
// Description:	This is common security routine which will be called from
//              security routines. It is from this routine most of the security
//              commands are sent to the drive.
//
// Input:
//      IN VOID                         *BusInterface,
//      UINT16                          Control,
//      UINT8                           *Buffer (32 Bytes),
//      UINT8                           SecurityCommand
//      UINT8                           RevisionCode
//                                      (Valid for Master password)
//
//  Control : Bit 0 : 0/1 User/Master Password
//            Bit 1 : 0/1 Normal/Enhanced Erase
//            Bit 8 : 0/1 High/Maximum Security level
//
//  Buffer  : Pointer to password buffer which will be used to when sending
//            SecurityCommand.
//
//
// Output:
//  EFI_STATUS : EFI_SUCCESS/EFI_DEVICE_ERROR
//
// Notes:
//  1. Buffer should be 32 bytes long (Mandatory). Even if Password is not
//     32 bytes long, pad it with zeros to create a buffer of 32 bytes.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS SecurityCommonRoutine(
    IN VOID *BusInterface,
    UINT16  Control,
    UINT8   *Buffer,
    UINT8   SecurityCommand,
    UINT16  RevisionCode,
    BOOLEAN ModeFlag )
{
    EFI_STATUS Status;
    UINT16     *SecurityBuffer;

    //
    // Allocate 512 Bytes
    //
    Status = pBS->AllocatePool( EfiBootServicesData,
                                SECURITY_BUFFER_LENGTH,
                                (VOID**)&SecurityBuffer );

    if ( EFI_ERROR( Status ))
    {
        return Status;
    }

    //
    // Clear the Buffer
    //
    ZeroMemory( SecurityBuffer, SECURITY_BUFFER_LENGTH );

    SecurityBuffer[0] = Control;

    //
    // Copy 32 Bytes
    //
    pBS->CopyMem( &(SecurityBuffer[1]), Buffer, IDE_PASSWORD_LENGTH );

    //
    // If Security Set password command is for Master, then update the
    // revision code.
    //
    if ((SecurityCommand == SECURITY_SET_PASSWORD) & (Control & 1))
    {
        if ((RevisionCode != 0) || (RevisionCode != 0xFFFF))
        {
            SecurityBuffer[17] = RevisionCode;
        }
    }

    //
    // Write 512 Bytes
    //
    Status = CommonReadWritePioHook(
        BusInterface,
        SecurityBuffer,
        SECURITY_BUFFER_LENGTH,
        0,
        SecurityCommand,
        TRUE,
        ModeFlag
        );

    pBS->FreePool( SecurityBuffer );
    return Status;
}


//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SmmHDDPasswordInterface
//
// Description: Manages HDD Password in SMM area.
//
// Input:
//          IN IDE_SECURITY_PROTOCOL    *This,
//          UINT16                      Control,
//          UINT8                       *Buffer
//          UINT8                       Action
//
//
//  Control : Bit 0 : 0/1 User/Master Password
//
//  Buffer  : Pointer to password buffer which will be used to when sending
//            SecurityCommand.
//
// Output:
// EFI_SUCCESS      : Password saved which will be used to unlock the drive
//                    during S3 resume.
// EFI_DEVICE_ERROR : Error in saving Password.
//
// Notes:
//  1. Buffer should be 32 bytes long (Mandatory). Even if Password is not
//     32 bytes long, pad it with zeros to create a buffer of 32 bytes.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS SmmHDDPasswordInterface(
    IN IDE_SECURITY_PROTOCOL *This,
    UINT16                   Control,
    UINT8                    *Buffer,
    UINT8                    Action )
{
#if defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x0001000A)
    UINT8               DataSize = 1;
#else
    UINTN               DataSize = 1;
#endif
    UINT8                 SwSmiValue = Action;
    UINTN                 i;
    HDD_PASSWORD          *HDDPasswordBuffer = gHDDPasswordBuffer;
    VOID                  *BusInterface   \
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN               ModeFlag   \
        = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    EFI_PCI_IO_PROTOCOL *PciIo;
    UINTN   SegNum;
    UINTN   BusNum;
    UINTN   DevNum;
    UINTN   FuncNum;
    EFI_STATUS  Status;

#if defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x00010014)
    EFI_SMM_COMMUNICATE_HEADER       *SmmCommunicationHeader;
    UINT8                            CommBuffer[sizeof(EFI_GUID) + sizeof(UINTN) + sizeof(HDD_PASSWORD)];
    UINTN                            CommBufferSize;
#endif

    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    if ( ModeFlag == FALSE )
    {
        //
        //  If HDD is not going to lose power in S3, no need to unlock password and put it in
        //  Freeze state during S3 resume.
        //
        if ( !(IdeBusInterface->IdeBusInitInterface->Flags   \
               & S3_RESUME_UNLOCK_HDD_PASSWORD))
        {
            return EFI_SUCCESS;
        }

        HDDPasswordBuffer->BaseAddress
            = IdeBusInterface->IdeDevice.Regs.CommandBlock.DataReg;
        HDDPasswordBuffer->Device = IdeBusInterface->IdeDevice.Device;
        HDDPasswordBuffer->DeviceControlReg
            = IdeBusInterface->IdeDevice.Regs.ControlBlock.DeviceControlReg;
        PciIo = IdeBusInterface->PciIO;

    }
    else {

        PciIo=SataDevInterface->AhciBusInterface->PciIO;
        HDDPasswordBuffer->PortNumber   = SataDevInterface->PortNumber;
        HDDPasswordBuffer->PMPortNumber = SataDevInterface->PMPortNumber;
    }

    //
    // Get PCI Bus/Device/Function number
    //
    Status = PciIo->GetLocation (   PciIo,
                                    &SegNum,
                                    &BusNum,
                                    &DevNum,
                                    &FuncNum
                                     );

    //
    // Save it for IdeSmm to initilize the controller.
    //
    HDDPasswordBuffer->BusNo=(UINT8)BusNum;
    HDDPasswordBuffer->DeviceNo=(UINT8)DevNum;
    HDDPasswordBuffer->FunctionNo=(UINT8)FuncNum;

    HDDPasswordBuffer->Signature = '$HDD'; // 0x44444824; //
    HDDPasswordBuffer->Control   = Control;
    HDDPasswordBuffer->ModeFlag  = ModeFlag;

    //
    //      HDDPasswordBuffer->RevisionCode = RevisionCode;
    //
    if ( Control & 0x01 )
    {
        for ( i = 0; i < sizeof (HDDPasswordBuffer->MasterPassword); i++ )
        {
            HDDPasswordBuffer->MasterPassword[i] = Buffer[i];
        } // end of for
    }
    else {
        for ( i = 0; i < sizeof (HDDPasswordBuffer->UserPassword); i++ )
        {
            HDDPasswordBuffer->UserPassword[i] = Buffer[i];
        } // end of for
    }

#if defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x00010014)

    if(!gSmmCommunication) {
        Status = pBS->LocateProtocol (
                        &gEfiSmmCommunicationProtocolGuid,
                        NULL,
                        (VOID **)&gSmmCommunication
                        );
        if (EFI_ERROR (Status)) {
            ASSERT_EFI_ERROR (Status);
            return Status;
        }
    }

    SmmCommunicationHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];

    if(SwSmiValue == SW_SMI_HDD_PASSWORD_SAVE) {
        pBS->CopyMem( &SmmCommunicationHeader->HeaderGuid, &gSaveHddPasswordGuid, sizeof( EFI_GUID ) );
    } else if( SwSmiValue == SW_SMI_HDD_PASSWORD_REMOVE ) {
        pBS->CopyMem( &SmmCommunicationHeader->HeaderGuid, &gRemoveHddPasswordGuid, sizeof( EFI_GUID ) );
    } else {
        // Unknown SwSmiValue
        return EFI_UNSUPPORTED;
    }
    
    SmmCommunicationHeader->MessageLength  = sizeof(HDD_PASSWORD);
    pBS->CopyMem( &SmmCommunicationHeader->Data, HDDPasswordBuffer, sizeof(HDD_PASSWORD) );

    CommBufferSize = sizeof(CommBuffer);
    Status = gSmmCommunication->Communicate (gSmmCommunication, &CommBuffer[0], &CommBufferSize);
#else
    //  Now Generate a SW SMI to log this data
    mSmmCtl->Trigger( mSmmCtl, &SwSmiValue, &DataSize, 0, 0 );
#endif

    return EFI_SUCCESS;
}

//<AMI_PHDR_START>
//----------------------------------------------------------------------------
//
// Procedure:   UpdateIdentifyData
//
// Description: Updates Identify command data.IDENTIFY_DATA(Command Code: 0xEC)
//              command used to update the Identifydata buffer.
//
// Input:
//  IN IDE_BUS_PROTOCOL             *IdeBusInterface,
//  IN BOOLEAN                      ModeFlag
//
// Output:
//      EFI_SUCCESS : Identifydata updated successfully.
//      EFI_ERROR   : Failed to update the identifydata.
//
// Notes:   ATA/ATAPI device type should have beeen known already.
//
//----------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS UpdateIdentifyData(
    IN IDE_BUS_PROTOCOL *BusInterface,
    IN BOOLEAN          ModeFlag )
{
    EFI_STATUS        Status;
    COMMAND_STRUCTURE CommandStructure;

    ZeroMemory( &CommandStructure, sizeof(COMMAND_STRUCTURE));

    CommandStructure.ByteCount = sizeof(IDENTIFY_DATA);
    CommandStructure.Command   = IDENTIFY_COMMAND;

    Status = CommonPioDataHook( BusInterface, CommandStructure, ModeFlag );

    return Status;
}

#if MASTER_PASSWORD_ENABLE
//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   OEMSetMasterPassword
//
// Description: Sets the Default Password String provided by OEM as
//              Master Password. SECURITY_SET_PASSWORD(Command Code : 0xF1)
//              security command is used to set the master password.
// Input:
//          IN IDE_SECURITY_PROTOCOL        *This,
//
// Output:
//      EFI_SUCCESS : OEM Master password set successfully.
//      EFI_ERROR   : Failed to set OEM Master passord to the hard disk.
//
// Notes:
//  OEM_MASTER_PASSWORD_TAG token string will be set as oem master password.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>

EFI_STATUS OEMSetMasterPassword(
    IN IDE_SECURITY_PROTOCOL *This )
{
    EFI_STATUS Status = 0;
    UINT8      Buffer[IDE_PASSWORD_LENGTH];
    UINT16     Control      = 1;
    UINT16     RevisionCode = 0xFFFE;
    UINTN      i;
    UINT16     SecurityStatus = 0;

    MemSet( &Buffer, IDE_PASSWORD_LENGTH, 0 );

    for ( i = 0; i < IDE_PASSWORD_LENGTH; i++ )
    {
        Buffer[i] = (UINT8)sOemMasterPasswordTag[i];

#if defined SETUP_PASSWORD_NON_CASE_SENSITIVE && SETUP_PASSWORD_NON_CASE_SENSITIVE 
        Buffer[i] = ((Buffer[i]>='a')&&(Buffer[i]<='z'))?(Buffer[i]+'A'-'a'):Buffer[i];
#endif
        if ( sOemMasterPasswordTag[i] == L'\0' )
        {
            break;
        }
    }

    //
    //Set the OEM master password if the HDD is not in Frozen or locked state.
    //
    ReturnSecurityStatus( This, &SecurityStatus );

    if ( !((SecurityStatus & 0x04) || (SecurityStatus & 0x08)))
    {
        Status = SecuritySetPassword( This, Control, Buffer, RevisionCode );
    }

    return Status;
}

#endif

#if (!DISABLE_SOFT_SET_PREV && !FORCE_HDD_PASSWORD_PROMPT ) || HDD_PASSWORD_ON_NVRAM
//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   GatherIdeInfo
//
// Description:	Gathers Ide Device's Bus,Func,Device & PM/PS/SM/SS Info.
//
// Input:
//          IN VOID                     *BusInterface,
//          OUT UINT32                  *HddDataId
//
// Output:
//      EFI_SUCCESS : IDE info retrieved successfully.
//      EFI_ERROR   : Failed to get IDE info.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS GatherIdeInfo(
    IN VOID    *BusInterface,
    BOOLEAN    ModeFlag,
    OUT UINT32 *HddDataId )
{
    EFI_STATUS            Status;
    UINTN                 SegNum;
    UINTN                 BusNum;
    UINTN                 DevNum;
    UINTN                 FuncNum;
    UINT16                wBDF;
    UINT16                wPortPMModeFlag;
    UINT8                 ChannelorPort;
    UINT8                 DeviceorPMPort;
    EFI_PCI_IO_PROTOCOL   *PciIo;
    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    if ( ModeFlag == FALSE )
    {
        PciIo          = IdeBusInterface->PciIO;
        ChannelorPort  = IdeBusInterface->IdeDevice.Channel;
        DeviceorPMPort =  IdeBusInterface->IdeDevice.Device;
    }
    else {
        PciIo          = SataDevInterface->AhciBusInterface->PciIO;
        ChannelorPort  = SataDevInterface->PortNumber;
        DeviceorPMPort =  SataDevInterface->PMPortNumber;
    }

    Status = PciIo->GetLocation( PciIo, &SegNum, &BusNum, &DevNum, &FuncNum );

    wBDF            = (UINT16)((BusNum << 8) | (DevNum << 3) | FuncNum );
    wPortPMModeFlag = (UINT16)((ChannelorPort << 12)   \
                               | (DeviceorPMPort << 4)   \
                               | ((UINT8)ModeFlag));

    *HddDataId = (UINT32)(((UINT16)wBDF << 16) + ((UINT16)wPortPMModeFlag));

    return EFI_SUCCESS;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   SetHddSecDataInNvram
//
// Description: Sets Hdd Security Data in NVRAM Area.
//
// Input:
//          IN VOID                     *BusInterface,
//          UINT32                      *HddDataId
//          UINT16                      Control,
//          UINT8                       *Buffer
//
//  Control : Bit 0 : 0/1 User/Master Password
//
//  Buffer  : Pointer to password buffer which will be used to when sending
//            SecurityCommand.
// Output:
//  EFI_SUCCESS : HDDPassword saved in NVram which later will be transfered to
//                SMRAM.
//  EFI_ERROR   : Failed to save the HDD password in nvram.
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS SetHddSecDataInNvram(
    IN VOID *BusInterface,
    UINT32  *HddDataId,
    UINT16  Control,
    UINT8   *Buffer )
{
    EFI_STATUS Status;
    HDDSECDATA *HddSecData=NULL;
    UINTN      i;
    CHAR16     *HddSecutiyData = NULL;
    UINT8      CryptBuffer[IDE_PASSWORD_LENGTH];
    UINTN      HddSecDataSize = sizeof (HDDSECDATA);
    UINT32     ParseIndex;
    UINT32     Attribute = 0;

    pBS->AllocatePool( EfiBootServicesData, sizeof (HDDSECDATA), &HddSecData );
    pBS->SetMem( HddSecData, sizeof(HDDSECDATA), 0 );
    pBS->AllocatePool( EfiBootServicesData,
                       IDE_PASSWORD_LENGTH,
                       &HddSecutiyData );
    pBS->SetMem( HddSecutiyData, IDE_PASSWORD_LENGTH, 0 );
    ConvertHddDataIdToString( *HddDataId, HddSecutiyData );

    //
    // Get the password variable so that other password will be
    // maintained in the nvram variable.
    //
    Status = pRS->GetVariable(
        HddSecutiyData,
        &gIdeSecurityPwNvguid,
        &Attribute,
        &HddSecDataSize,
        HddSecData
        );

    if ( EFI_ERROR( Status ))
    {
        pBS->SetMem( HddSecData, sizeof(HDDSECDATA), 0 );
        if(Attribute == 0) {
            Attribute = (UINT32)(EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS);
        }
    }


    for ( ParseIndex = 0; ParseIndex < IDE_PASSWORD_LENGTH; ParseIndex++ )
    {
        if ( Buffer[ParseIndex] == 0 )
        {
            break;
        }
    }

    HddSecData->UserMaster     = Control;
    HddSecData->PasswordLength = ParseIndex;

    if ( Control & 0x01 )
    {
        EncodeDecodePassword( Buffer, CryptBuffer, ParseIndex );

        for ( i = 0; i < ParseIndex; i++ )
        {
            HddSecData->HddMasterPassword[i] = CryptBuffer[i];
        }

        for ( i = ParseIndex; i < sizeof (HddSecData->HddMasterPassword); i++ )
        {
            HddSecData->HddMasterPassword[i] = 00;
        }
    }
    else {
        EncodeDecodePassword( Buffer, CryptBuffer, ParseIndex );

        for ( i = 0; i < ParseIndex; i++ )
        {
            HddSecData->HddUserPassword[i] = CryptBuffer[i];
        }

        for ( i = ParseIndex; i < sizeof (HddSecData->HddUserPassword); i++ )
        {
            HddSecData->HddUserPassword[i] = 00;
        }
    }

    Status = pRS->SetVariable(
        HddSecutiyData,
        &gIdeSecurityPwNvguid,
        Attribute,
        HddSecDataSize,
        HddSecData
        );

    ASSERT_EFI_ERROR( Status );
    pBS->FreePool( HddSecData );

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   TransferPwDataFromNvramToSmram
//
// Description: Transfers Stored Data from NVRAM to SMRAM.
//
// Input:
//          IN IDE_SECURITY_PROTOCOL    *This,
//
// Output:
//  EFI_SUCCESS      : Password saved in SMRAM.
//  EFI_DEVICE_ERROR : Password not saved in SMRAM.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS TransferPwDataFromNvramToSmram(
    IN IDE_SECURITY_PROTOCOL *This 
)
{
    UINT32      HddDataId       = 0;
    UINT16      UserMaster      = 0;
    CHAR16      *HddSecutiyData = NULL;
    HDDSECDATA   *HddSecData = NULL;
    VOID         *BusInterface   \
        = ((SECURITY_PROTOCOL* )This)->BusInterface;
    BOOLEAN      ModeFlag = ((SECURITY_PROTOCOL* )This)->ModeFlag;
    EFI_STATUS  Status;
    UINT16      Control;
    UINTN       i;
    UINTN       HddSecDataSize = sizeof (HDDSECDATA);
    UINT8       CryptBuffer[IDE_PASSWORD_LENGTH];
    UINT8       Buffer[IDE_PASSWORD_LENGTH];
    UINT16      SecurityStatus = 0;
    
    Status=ReturnSecurityStatus( This, &SecurityStatus );
    
    if(EFI_ERROR(Status)) {
        return Status;
    }

    // Hdd Password Nvram Variable will not be avilable if the HDD is in locked state. 
    // So return without copying the password to Smram as the password 
    // data is not avilable
    
    if ( SecurityStatus & 4 ) {
        return EFI_SUCCESS;
    }

    Status = GatherIdeInfo( BusInterface, ModeFlag, &HddDataId );
    ASSERT_EFI_ERROR( Status );

    pBS->AllocatePool( EfiBootServicesData,
                       IDE_PASSWORD_LENGTH,
                       &HddSecutiyData );
    pBS->SetMem( HddSecutiyData, IDE_PASSWORD_LENGTH, 0 );
    ConvertHddDataIdToString( HddDataId, HddSecutiyData );

    pBS->AllocatePool( EfiBootServicesData, sizeof (HDDSECDATA), &HddSecData );
    pBS->SetMem( HddSecData, sizeof(HDDSECDATA),  0 );

    pBS->SetMem( Buffer,     IDE_PASSWORD_LENGTH, 0 );

    Status = pRS->GetVariable(
        HddSecutiyData,
        &gIdeSecurityPwNvguid,
        NULL,
        &HddSecDataSize,
        HddSecData
        );

    if(Status){
        Status = HDDPortReset(BusInterface,ModeFlag);
        return Status;
    }

    Control = HddSecData->UserMaster;

    if ( Control & 0x01 )
    {
        for ( i = 0; i < sizeof (HddSecData->HddMasterPassword); i++ )
        {
            CryptBuffer[i] = HddSecData->HddMasterPassword[i];
        }

        EncodeDecodePassword( CryptBuffer, Buffer, HddSecData->PasswordLength );
    }
    else {
        for ( i = 0; i < sizeof (HddSecData->HddUserPassword); i++ )
        {
            CryptBuffer[i] = HddSecData->HddUserPassword[i];
        }

        EncodeDecodePassword( CryptBuffer, Buffer, HddSecData->PasswordLength );
    }

        SmmHDDPasswordInterface( This,
                             Control,
                             Buffer,
                             SW_SMI_HDD_PASSWORD_SAVE );

    pBS->FreePool( HddSecData );

    return Status;
}


//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   ConvertHddDataIdToString
//
// Description: Converts Integer HDD Data Id to String.
//
// Input:
//           IN  UINT32          DataId,
//           OUT CHAR16          *String
// Output:
//	        None
//
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
VOID ConvertHddDataIdToString(
    IN UINT32  DataId,
    OUT CHAR16 *String )
{
    Swprintf( String, L"%*d", 0, DataId );
    return;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:	EncodeDecodePassword
//
// Description:	Encodes/Decodes Password.
//
// Input:
//           IN   UINT8        *InputString,
//           OUT  UINT8        *OutputString,
//           IN   UINT32       StringLen
// Output:
//          None
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
VOID EncodeDecodePassword(
    IN UINT8  *InputString,
    OUT UINT8 *OutputString,
    IN UINT32 StringLength )
{
    UINT8  *Key;
    UINT32 i;
    UINT32 KeyIndex;
    UINT32 KeyLength;

    if ((InputString == NULL) || (StringLength == 0))
    {
        return;
    }

    KeyLength = (UINT32)( Strlen( HDD_PWD_ENCRYPTION_KEY ));
    pBS->AllocatePool( EfiBootServicesData, KeyLength, (VOID**)&Key );
    pBS->SetMem( Key, KeyLength, 0 );
    pBS->CopyMem( Key, HDD_PWD_ENCRYPTION_KEY, KeyLength );
    ASSERT( Key != NULL );

    for ( i = 0, KeyIndex = 0; i < StringLength; i++, KeyIndex++ )
    {
        if ( KeyIndex == (KeyLength - 1))
        {
            KeyIndex = 0;
        }
        OutputString[i] = (UINT8) ( InputString[i] ^ Key[KeyIndex] );
    }

    pBS->FreePool( Key );
    return;
}
  
#endif


//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   CommonNonDataHook
//
// Description: Common Hook which Calls Non Data Command.
//
// Input:       IN    VOID*                 BusInterface,
//              IN    COMMAND_STRUCTURE     CommandStructure,
//              IN    BOOLEAN               ModeFlag
//
// Output:
//  EFI_SUCCESS                      : Non Data command completed successfully.
//  EFI_DEVICE_ERROR/EFI_UNSUPPORTED : Not supported.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS CommonNonDataHook(
    IN VOID              *BusInterface,
    IN COMMAND_STRUCTURE CommandStructure,
    IN BOOLEAN           ModeFlag )
{
    EFI_STATUS            Status;
    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    if ( ModeFlag == FALSE )
    {
        CommandStructure.Device = IdeBusInterface->IdeDevice.Device << 4;

        //
        // Idebus API changed from Core 4.6.5.2. Added Core Version check for the OLD 
        // Core support.
        //
#if defined CORE_COMBINED_VERSION && (CORE_COMBINED_VERSION > 0x4028b) 
        Status = IdeBusInterface->IdeNonDataCommand(
            IdeBusInterface,
            CommandStructure.Features,
            (UINT8)CommandStructure.SectorCount,
            (UINT8)(CommandStructure.SectorCount >> 8),
            CommandStructure.LBALow,
            CommandStructure.LBALowExp,
            CommandStructure.LBAMid,
            CommandStructure.LBAMidExp,
            CommandStructure.LBAHigh,
            CommandStructure.LBAHighExp,
            CommandStructure.Device,
            CommandStructure.Command
            );
#else 
        Status = IdeBusInterface->IdeNonDataCommand(
            IdeBusInterface,
            CommandStructure.Features,
            (UINT8)CommandStructure.SectorCount,
            CommandStructure.LBALow,
            CommandStructure.LBAMid,
            CommandStructure.LBAHigh,
            CommandStructure.Device,
            CommandStructure.Command
            );

#endif
    }
    else {
        Status = SataDevInterface->AhciBusInterface->ExecuteNonDataCommand(
            SataDevInterface,
            CommandStructure
            );
    }

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   CommonPioDataHook
//
// Description: Common Hook which Calls Pio Data Command.
//
// Input:       IN    VOID*                 BusInterface,
//              IN    COMMAND_STRUCTURE     CommandStructure,
//              IN    BOOLEAN               ModeFlag
//
// Output:
//  EFI_SUCCESS                      : Pio data command completed.
//  EFI_DEVICE_ERROR/EFI_UNSUPPORTED : Not supported.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS CommonPioDataHook(
    IN VOID              *BusInterface,
    IN COMMAND_STRUCTURE CommandStructure,
    IN BOOLEAN           ModeFlag )
{
    EFI_STATUS            Status;
    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;
    VOID                  *IdentifyBuffer = NULL;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    Status = pBS->AllocatePool( EfiBootServicesData,
                                sizeof(IDENTIFY_DATA),
                                (VOID**)&IdentifyBuffer
                                );
    //
    //  Read Identifydata
    //
    CommandStructure.Buffer = IdentifyBuffer;

    if ( ModeFlag == FALSE )
    {
        CommandStructure.Device = IdeBusInterface->IdeDevice.Device << 4;
        Status                  = IdeBusInterface->AtaPioDataIn(
            IdeBusInterface,
            CommandStructure
                .Buffer,
            CommandStructure
                .ByteCount,
            CommandStructure
                .Features,
            (UINT8)
            CommandStructure.SectorCount,
            CommandStructure
                .LBALow,
            CommandStructure
                .LBAMid,
            CommandStructure
                .LBAHigh,
            CommandStructure
                .Device,
            CommandStructure
                .Command,
            FALSE
            );
        //
        // Copy Identify Data
        //
        pBS->CopyMem( &(IdeBusInterface->IdeDevice.IdentifyData),
                      IdentifyBuffer,
                      sizeof(IDENTIFY_DATA)
                      );
    }
    else {
        Status = SataDevInterface->AhciBusInterface->ExecutePioDataCommand(
            SataDevInterface,
            &CommandStructure,
            FALSE
            );

        //
        // Copy Identify Data
        //
        pBS->CopyMem( &(SataDevInterface->IdentifyData),
                      IdentifyBuffer,
                      sizeof(IDENTIFY_DATA)
                      );
    }

    pBS->FreePool( IdentifyBuffer );

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
//
// Procedure:   CommonReadWritePioHook
//
// Description: Common Hook which Calls Read Write PIO.
//
// Input:
//  IN VOID                         *BusInterface,
//  VOID                            *Buffer,
//  UINTN                           ByteCount,
//  UINT64                          LBA
//  IN UINT8                        ReadWriteCommand,
//  IN BOOLEAN                      ReadWrite        Read/Write = 0/1
//  IN BOOLEAN                      ModeFlag
//
// Output:
//      *Buffer updated from PIO command.
//
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS CommonReadWritePioHook(
    IN VOID     *BusInterface,
    IN OUT VOID *Buffer,
    IN UINTN    ByteCount,
    IN UINT64   LBA,
    IN UINT8    ReadWriteCommand,
    IN BOOLEAN  ReadWrite,
    IN BOOLEAN  ModeFlag )
{
    EFI_STATUS            Status;
    IDE_BUS_PROTOCOL      *IdeBusInterface;
    SATA_DEVICE_INTERFACE *SataDevInterface;

    IdeBusInterface  = (IDE_BUS_PROTOCOL*)BusInterface;
    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;

    if ( ModeFlag == FALSE )
    {
        Status = IdeBusInterface->AtaReadWritePio(
            IdeBusInterface,
            Buffer,
            ByteCount,
            0,
            ReadWriteCommand,
            TRUE
            );
    }
    else {
        Status = SataDevInterface->AhciBusInterface->SataReadWritePio(
            SataDevInterface,
            Buffer,
            ByteCount,
            0,
            ReadWriteCommand,
            TRUE
            );
    }

    return Status;
}

//<AMI_PHDR_START>
//---------------------------------------------------------------------------
//
// Procedure:   LocateAhciSmmServiceEvent
//
// Description: Generates the SwSMI to Locate the AhciSMM Protocol
//              that is used by IdeSMM.
//
// Input:
//        EFI_EVENT     Event,
//        VOID          *Context
//
// Output:
//    None
//---------------------------------------------------------------------------
//<AMI_PHDR_END>
VOID LocateAhciSmmServiceEvent(
    EFI_EVENT Event,
    VOID      *Context )
{
#if defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x00010014)
    EFI_SMM_COMMUNICATE_HEADER  *SmmCommunicateHeader;
    UINT8                       CommBuffer[sizeof(EFI_GUID) + sizeof(UINTN) + sizeof(UINT8*)];
    UINTN                       CommBufferSize;
    EFI_STATUS                  Status;
#elif defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x0001000A)
    UINT8 DataSize = 1;
#else
    UINTN DataSize = 1;
#endif

#if defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x00010014)

    if(gSmmCommunication != NULL) {
        Status = pBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &gSmmCommunication);
        if (EFI_ERROR(Status)) {
            ASSERT_EFI_ERROR(Status);
            return ;
        }
    }

    // Copy Smm Communicate Header Here
    SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *)CommBuffer;
    pBS->CopyMem( &SmmCommunicateHeader->HeaderGuid, &gLocateIdeAhciSmmProtocolGuid, sizeof( EFI_GUID ) );
    SmmCommunicateHeader->MessageLength  = sizeof(UINT8 *);

    // Allocate the Buffer for the Passing the Password Data to 
    // Unlock command in SMM 
    Status = pBS->AllocatePool( EfiReservedMemoryType,
                                512,
                                (VOID**)&SmmCommunicateHeader->Data );

    // Calculate Size of Communication buffer
    CommBufferSize  = sizeof (CommBuffer);

    // Send data to SMM.
    Status = gSmmCommunication->Communicate (gSmmCommunication, &CommBuffer[0], &CommBufferSize);
    ASSERT_EFI_ERROR(Status);

#else
    UINT8 SwSmiValue = SW_SMI_AHCI_LOCATE_AHCI_SMM;

    // Now Generate a SW SMI to Locate all the SMM protocols used by IDESMM
    mSmmCtl->Trigger( mSmmCtl, &SwSmiValue, &DataSize, 0, 0 );
#endif

    return;
}


EFI_STATUS
HDDPortReset(
    IN VOID *BusInterface,
    IN BOOLEAN           ModeFlag
)
{

    EFI_STATUS                          Status;
    AHCI_BUS_PROTOCOL                   *AhciBusInterface;
    SATA_DEVICE_INTERFACE               *SataDeviceInterface;
    DLINK                               *dlink;
    COMMAND_STRUCTURE                   CommandStructure = {0};
    SATA_DEVICE_INTERFACE               *SataDevInterface;
    EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *Entries = NULL;


    SataDevInterface = (SATA_DEVICE_INTERFACE*)BusInterface;
    AhciBusInterface = SataDevInterface->AhciBusInterface;

    if ( ModeFlag == FALSE ) {
        return EFI_UNSUPPORTED;
    }

    // Issue Disable Software Preservation command all the Sata Devices connected.
    dlink = AhciBusInterface->SataDeviceList.pHead; 
    if (dlink){ 
        do {
            SataDeviceInterface = OUTTER(dlink, SataDeviceLink, SATA_DEVICE_INTERFACE);
            if(SataDevInterface->PortNumber == SataDeviceInterface->PortNumber &&
                SataDevInterface->PMPortNumber == SataDeviceInterface->PMPortNumber) {
 
                // Send Disable Software Preservation command.
                CommandStructure.Features = DISABLE_SATA2_SOFTPREV;
                CommandStructure.SectorCount = 6;
                CommandStructure.Command = SET_FEATURE_COMMAND;
                Status = AhciBusInterface->ExecuteNonDataCommand(SataDeviceInterface,
                                                                 CommandStructure);
                break;
            }
            dlink = dlink-> pNext;
        }while (dlink);    
     }

    // Reset the port to restore the initial State
    Status = AhciBusInterface->GeneratePortReset(
                                AhciBusInterface,
                                SataDevInterface,
                                SataDevInterface->PortNumber,
                                SataDevInterface->PMPortNumber,
                                0,
                                0
                                );


    // Disconnect the Controller Handle 
    Status = pBS->DisconnectController(
                                AhciBusInterface->ControllerHandle,
                                NULL,
                                NULL);

    // Connect Controller handle again to invoke the HDD Password Verfication
    Status = pBS->ConnectController(
                                AhciBusInterface->ControllerHandle,
                                NULL,
                                NULL,
                                TRUE);

    // Send Enable Software Preservation command.
    CommandStructure.Features = 0x10;
    CommandStructure.SectorCount = 6;
    CommandStructure.Command = SET_FEATURE_COMMAND;
    Status = AhciBusInterface->ExecuteNonDataCommand(SataDeviceInterface,
                                                     CommandStructure);

    return Status;
}

//**********************************************************************
//**********************************************************************
//**                                                                  **
//**        (C)Copyright 1985-2014, American Megatrends, Inc.         **
//**                                                                  **
//**                       All Rights Reserved.                       **
//**                                                                  **
//**         5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093     **
//**                                                                  **
//**                       Phone: (770)-246-8600                      **
//**                                                                  **
//**********************************************************************
//**********************************************************************