MdePkg/Include/Protocol/LegacyBios.h - edk2 - Git at Google

 /** @file
   The EFI Legacy BIOS Protocol is used to abstract legacy Option ROM usage
   under EFI and Legacy OS boot.

   Note: The names for EFI_IA32_REGISTER_SET elements were picked to follow
   well known naming conventions.

   Thunk - A thunk is a transition from one processor mode to another. A Thunk
   is a transition from native EFI mode to 16-bit mode. A reverse thunk
   would be a transition from 16-bit mode to native EFI mode.

   You most likely should not use this protocol! Find the EFI way to solve the
   problem to make your code portable

   Copyright (c) 2006, Intel Corporation
   All rights reserved. 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.

   Module Name:  LegacyBios.h

   @par Revision Reference:
   This protocol is defined in Framework for EFI Compatibility Support Module spec
   Version 0.96

 **/

 #ifndef _EFI_LEGACY_BIOS_H
 #define _EFI_LEGACY_BIOS_H

 #define EFI_LEGACY_BIOS_PROTOCOL_GUID \
   { \
     0xdb9a1e3d, 0x45cb, 0x4abb, {0x85, 0x3b, 0xe5, 0x38, 0x7f, 0xdb, 0x2e, 0x2d } \
   }

 typedef struct _EFI_LEGACY_BIOS_PROTOCOL EFI_LEGACY_BIOS_PROTOCOL;

 //
 // Convert from 32-bit address (_Adr) to Segment:Offset 16-bit form
 //
 #define EFI_SEGMENT(_Adr)     (UINT16) ((UINT16) (((UINTN) (_Adr)) >> 4) & 0xf000)
 #define EFI_OFFSET(_Adr)      (UINT16) (((UINT16) ((UINTN) (_Adr))) & 0xffff)
 #define BYTE_GRANULARITY      0x01
 #define WORD_GRANULARITY      0x02
 #define DWORD_GRANULARITY     0x04
 #define QWORD_GRANULARITY     0x08
 #define PARAGRAPH_GRANULARITY 0x10

 #define CARRY_FLAG            0x01

 //*********************************************************
 // EFI_EFLAGS_REG
 //*********************************************************
 typedef struct {
   UINT32 CF:1;
   UINT32 Reserved1:1;
   UINT32 PF:1;
   UINT32 Reserved2:1;
   UINT32 AF:1;
   UINT32 Reserved3:1;
   UINT32 ZF:1;
   UINT32 SF:1;
   UINT32 TF:1;
   UINT32 IF:1;
   UINT32 DF:1;
   UINT32 OF:1;
   UINT32 IOPL:2;
   UINT32 NT:1;
   UINT32 Reserved4:2;
   UINT32 VM:1;
   UINT32 Reserved5:14;
 } EFI_EFLAGS_REG;

 //*********************************************************
 // EFI_DWORD_REGS
 //*********************************************************

 typedef struct {
     UINT32           EAX;
     UINT32           EBX;
     UINT32           ECX;
     UINT32           EDX;
     UINT32           ESI;
     UINT32           EDI;
     EFI_EFLAGS_REG   EFlags;
     UINT16           ES;
     UINT16           CS;
     UINT16           SS;
     UINT16           DS;
     UINT16           FS;
     UINT16           GS;
     UINT32           EBP;
     UINT32           ESP;
 } EFI_DWORD_REGS;

 //*******************************************
 // EFI_FLAGS_REG
 //*******************************************
 typedef struct {
   UINT16     CF:1;
   UINT16     Reserved1:1;
   UINT16     PF:1;
   UINT16     Reserved2:1;
   UINT16     AF:1;
   UINT16     Reserved3:1;
   UINT16     ZF:1;
   UINT16     SF:1;
   UINT16     TF:1;
   UINT16     IF:1;
   UINT16     DF:1;
   UINT16     OF:1;
   UINT16     IOPL:2;
   UINT16     NT:1;
   UINT16     Reserved4:1;
 } EFI_FLAGS_REG;


 //*********************************************************
 // EFI_WORD_REGS
 //*********************************************************

 typedef struct {
     UINT16           AX;
     UINT16           ReservedAX;
     UINT16           BX;
     UINT16           ReservedBX;
     UINT16           CX;
     UINT16           ReservedCX;
     UINT16           DX;
     UINT16           ReservedDX;
     UINT16           SI;
     UINT16           ReservedSI;
     UINT16           DI;
     UINT16           ReservedDI;
     EFI_FLAGS_REG    Flags;
     UINT16           ReservedFlags;
     UINT16           ES;
     UINT16           CS;
     UINT16           SS;
     UINT16           DS;
     UINT16           FS;
      UINT16           GS;
     UINT16           BP;
     UINT16           ReservedBP;
     UINT16           SP;
     UINT16           ReservedSP;
 } EFI_WORD_REGS;

 //*********************************************************
 // EFI_BYTE_REGS
 //*********************************************************

 typedef struct {
     UINT8   AL, AH;
     UINT16  ReservedAX;
     UINT8   BL, BH;
     UINT16  ReservedBX;
     UINT8   CL, CH;
     UINT16  ReservedCX;
     UINT8   DL, DH;
     UINT16  ReservedDX;
 } EFI_BYTE_REGS;

 typedef union {
   EFI_DWORD_REGS  E;
   EFI_WORD_REGS   X;
   EFI_BYTE_REGS   H;
 } EFI_IA32_REGISTER_SET;

 #pragma pack(1)
 //
 // $EFI table created by Legacy16 code and consumed by EFI Legacy driver
 //
 typedef struct {
   UINT32  Signature;      // "$EFI"
   UINT8   TableChecksum;
   UINT8   TableLength;
   UINT8   EfiMajorRevision;
   UINT8   EfiMinorRevision;
   UINT8   TableMajorRevision;
   UINT8   TableMinorRevision;
   UINT8   Reserved[2];
   UINT16  Legacy16CallSegment;
   UINT16  Legacy16CallOffset;

   UINT16  PnPInstallationCheckSegment;
   UINT16  PnPInstallationCheckOffset;

   UINT32  EfiSystemTable;
   UINT32  OemStringPointer;
   UINT32  AcpiRsdPtrPointer;
   UINT16  OemRevision;
   UINT32  E820Pointer;
   UINT32  E820Length;
   UINT32  IrqRoutingTablePointer;
   UINT32  IrqRoutingTableLength;
   UINT32  MpTablePtr;
   UINT32  MpTableLength;
   UINT16  OemIntSegment;
   UINT16  OemIntOffset;
   UINT16  Oem32Segment;
   UINT16  Oem32Offset;
   UINT16  Oem16Segment;
   UINT16  Oem16Offset;
   UINT16  TpmSegment;
   UINT16  TpmOffset;
   UINT32  IbvPointer;
   UINT32  PciExpressBase;
   UINT8   LastPciBus;
 } EFI_COMPATIBILITY16_TABLE;
 //
 // define maximum number of HDD system supports
 //
 #define MAX_HDD_ENTRIES 0x30

 typedef struct {
   UINT16  Raw[256];
 } ATAPI_IDENTIFY;

 //
 // HDD_INFO status
 //
 #define HDD_PRIMARY               0x01
 #define HDD_SECONDARY             0x02
 #define HDD_MASTER_ATAPI_CDROM    0x04
 #define HDD_SLAVE_ATAPI_CDROM     0x08
 #define HDD_MASTER_IDE            0x20
 #define HDD_SLAVE_IDE             0x40
 #define HDD_MASTER_ATAPI_ZIPDISK  0x10
 #define HDD_SLAVE_ATAPI_ZIPDISK   0x80

 typedef struct {
   UINT16          Status;
   UINT32          Bus;
   UINT32          Device;
   UINT32          Function;
   UINT16          CommandBaseAddress;
   UINT16          ControlBaseAddress;
   UINT16          BusMasterAddress;
   UINT8           HddIrq;
   ATAPI_IDENTIFY  IdentifyDrive[2];
 } HDD_INFO;

 //
 // Parties data structures
 //
 typedef struct {
   UINT8 DirectoryServiceValidity : 1;
   UINT8 RabcaUsedFlag : 1;
   UINT8 ExecuteHddDiagnosticsFlag : 1;
   UINT8 Reserved : 5;
 } UDC_ATTRIBUTES;

 typedef struct {
   UDC_ATTRIBUTES  Attributes;
   UINT8           DeviceNumber;
   UINT8           BbsTableEntryNumberForParentDevice;
   UINT8           BbsTableEntryNumberForBoot;
   UINT8           BbsTableEntryNumberForHddDiag;
   UINT8           BeerData[128];
   UINT8           ServiceAreaData[64];
 } UD_TABLE;

 //
 // define BBS Device Types
 //
 #define BBS_FLOPPY        0x01
 #define BBS_HARDDISK      0x02
 #define BBS_CDROM         0x03
 #define BBS_PCMCIA        0x04
 #define BBS_USB           0x05
 #define BBS_EMBED_NETWORK 0x06
 #define BBS_BEV_DEVICE    0x80
 #define BBS_UNKNOWN       0xff

 typedef struct {
   UINT16  OldPosition : 4;
   UINT16  Reserved1 : 4;
   UINT16  Enabled : 1;
   UINT16  Failed : 1;
   UINT16  MediaPresent : 2;
   UINT16  Reserved2 : 4;
 } BBS_STATUS_FLAGS;

 #define MAX_BBS_ENTRIES 0x100
 //
 // BBS_IGNORE_ENTRY is placed in the BootPriority field if the entry is to
 // be skipped.
 // BBS_UNPRIORITIZED_ENTRY is placed in the BootPriority field before
 // priority has been assigned but indicates valid entry.
 // BBS_LOWEST_PRIORITY is normally used for removable media with no media
 //   inserted. This allows the 16-bit CSM to allocate a drive letter to
 //   the device.
 // BBS_DO_NOT_BOOT_FROM is used for devices that the 16-bit CSM is to assign
 //   a drive letter to but never boot from.
 //
 // AdditionalIrq??Handler usage is IBV specific. The fields have been added
 // for:
 //   1. Saving non-BBS card info about IRQs taken by card.
 //   2. For BBS compliant cards that hook IRQs in order to have their SETUP
 //      executed.
 //
 #define BBS_DO_NOT_BOOT_FROM    0xFFFC
 #define BBS_LOWEST_PRIORITY     0xFFFD
 #define BBS_UNPRIORITIZED_ENTRY 0xFFFE
 #define BBS_IGNORE_ENTRY        0xFFFF

 typedef struct {
   UINT16            BootPriority;
   UINT32            Bus;
   UINT32            Device;
   UINT32            Function;
   UINT8             Class;
   UINT8             SubClass;
   UINT16            MfgStringOffset;
   UINT16            MfgStringSegment;
   UINT16            DeviceType;
   BBS_STATUS_FLAGS  StatusFlags;
   UINT16            BootHandlerOffset;
   UINT16            BootHandlerSegment;
   UINT16            DescStringOffset;
   UINT16            DescStringSegment;
   UINT32            InitPerReserved;
   UINT32            AdditionalIrq13Handler;
   UINT32            AdditionalIrq18Handler;
   UINT32            AdditionalIrq19Handler;
   UINT32            AdditionalIrq40Handler;
   UINT8             AssignedDriveNumber;
   UINT32            AdditionalIrq41Handler;
   UINT32            AdditionalIrq46Handler;
   UINT32            IBV1;
   UINT32            IBV2;
 } BBS_TABLE;

 #pragma pack()

 /**
   Thunk to 16-bit real mode and execute a software interrupt with a vector
   of BiosInt. Regs will contain the 16-bit register context on entry and
   exit.

   @param  This Protocol instance pointer.
   @param  BiosInt Processor interrupt vector to invoke
   @param  Reg Register contexted passed into (and returned) from thunk to
   16-bit mode

   @retval  FALSE Thunk completed, and there were no BIOS errors in the target code.
   See Regs for status.
   @retval  TRUE There was a BIOS erro in the target code.

 **/
 typedef
 BOOLEAN
 (EFIAPI *EFI_LEGACY_BIOS_INT86) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   IN  UINT8                           BiosInt,
   IN OUT  EFI_IA32_REGISTER_SET       *Regs
   )
 ;

 /**
   Thunk to 16-bit real mode and call Segment:Offset. Regs will contain the
   16-bit register context on entry and exit. Arguments can be passed on
   the Stack argument

   @param  This Protocol instance pointer.
   @param  Segment Segemnt of 16-bit mode call
   @param  Offset Offset of 16-bit mdoe call
   @param  Reg Register contexted passed into (and returned) from thunk to
   16-bit mode
   @param  Stack Caller allocated stack used to pass arguments
   @param  StackSize Size of Stack in bytes

   @retval  FALSE Thunk completed, and there were no BIOS errors in the target code.
   See Regs for status.
   @retval  TRUE There was a BIOS erro in the target code.

 **/
 typedef
 BOOLEAN
 (EFIAPI *EFI_LEGACY_BIOS_FARCALL86) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   IN  UINT16                          Segment,
   IN  UINT16                          Offset,
   IN  EFI_IA32_REGISTER_SET           *Regs,
   IN  VOID                            *Stack,
   IN  UINTN                           StackSize
   )
 ;

 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_CHECK_ROM) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   IN  EFI_HANDLE                      PciHandle,
   OUT VOID                            **RomImage, OPTIONAL
   OUT UINTN                           *RomSize, OPTIONAL
   OUT UINTN                           *Flags

 /**
   Test to see if a legacy PCI ROM exists for this device. Optionally return
   the Legacy ROM instance for this PCI device.

   @param  This Protocol instance pointer.
   @param  PciHandle The PCI PC-AT OPROM from this devices ROM BAR will be loaded
   @param  RomImage Return the legacy PCI ROM for this device
   @param  RomSize Size of ROM Image
   @param  Flags Indicates if ROM found and if PC-AT.

   @retval  EFI_SUCCESS Legacy Option ROM availible for this device
   @retval  EFI_UNSUPPORTED Legacy Option ROM not supported.

 **/
   )
 ;

 /**
   Load a legacy PC-AT OPROM on the PciHandle device. Return information
   about how many disks were added by the OPROM and the shadow address and
   size. DiskStart & DiskEnd are INT 13h drive letters. Thus 0x80 is C:

   @param  This Protocol instance pointer.
   @param  PciHandle The PCI PC-AT OPROM from this devices ROM BAR will be loaded.
   This value is NULL if RomImage is non-NULL. This is the normal
   case.
   @param  RomImage A PCI PC-AT ROM image. This argument is non-NULL if there is
   no hardware associated with the ROM and thus no PciHandle,
   otherwise is must be NULL.
   Example is PXE base code.
   @param  Flags Return Status if ROM was found and if was Legacy OPROM.
   @param  DiskStart Disk number of first device hooked by the ROM. If DiskStart
   is the same as DiskEnd no disked were hooked.
   @param  DiskEnd Disk number of the last device hooked by the ROM.
   @param  RomShadowAddress Shadow address of PC-AT ROM
   @param  RomShadowSize Size of RomShadowAddress in bytes

   @retval  EFI_SUCCESS Thunk completed, see Regs for status.
   @retval  EFI_INVALID_PARAMETER PciHandle not found

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_INSTALL_ROM) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   IN  EFI_HANDLE                      PciHandle,
   IN  VOID                            **RomImage,
   OUT UINTN                           *Flags,
   OUT UINT8                           *DiskStart, OPTIONAL
   OUT UINT8                           *DiskEnd, OPTIONAL
   OUT VOID                            **RomShadowAddress, OPTIONAL
   OUT UINT32                          *ShadowedRomSize OPTIONAL
   )
 ;

 /**
   Attempt to legacy boot the BootOption. If the EFI contexted has been
   compromised this function will not return.

   @param  This Protocol instance pointer.
   @param  BootOption EFI Device Path from BootXXXX variable.
   @param  LoadOptionSize Size of LoadOption in size.
   @param  LoadOption LoadOption from BootXXXX variable

   @retval  EFI_SUCCESS Removable media not present

 **/
 /**
   Update BDA with current Scroll, Num & Cap lock LEDS

   @param  This Protocol instance pointer.
   @param  Leds Status of current Scroll, Num & Cap lock LEDS
   Bit 0 is Scroll Lock  0 = Not locked
   Bit 1 is Num Lock
   Bit 2 is Caps Lock

   @retval  EFI_SUCCESS Removable media not present

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_BOOT) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   IN  BBS_BBS_DEVICE_PATH             *BootOption,
   IN  UINT32                          LoadOptionsSize,
   IN  VOID                            *LoadOptions
   )
 ;
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_UPDATE_KEYBOARD_LED_STATUS) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   IN  UINT8                           Leds
   )
 ;

 /**
   Retrieve legacy BBS info and assign boot priority.

   @param  This Protocol instance pointer.
   @param  HddCount Number of HDD_INFO structures
   @param  HddInfo Onboard IDE controller information
   @param  BbsCount Number of BBS_TABLE structures
   @param  BbsTable List BBS entries

   @retval  EFI_SUCCESS Tables returned

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_GET_BBS_INFO) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   OUT UINT16                          *HddCount,
   OUT HDD_INFO                        **HddInfo,
   OUT UINT16                          *BbsCount,
   OUT IN BBS_TABLE                    **BbsTable
   )
 ;

 /**
   Assign drive number to legacy HDD drives prior to booting an EFI
   aware OS so the OS can access drives without an EFI driver.

   @param  This Protocol instance pointer.
   @param  BbsCount Number of BBS_TABLE structures
   @param  BbsTable List BBS entries

   @retval  EFI_SUCCESS Drive numbers assigned

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_PREPARE_TO_BOOT_EFI) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   OUT UINT16                          *BbsCount,
   OUT IN BBS_TABLE                    **BbsTable
   )
 ;

 /**
   To boot from an unconventional device like parties and/or execute
   HDD diagnostics.

   @param  This Protocol instance pointer.
   @param  Attributes How to interpret the other input parameters
   @param  BbsEntry The 0-based index into the BbsTable for the parent
   device.
   @param  BeerData Pointer to the 128 bytes of ram BEER data.
   @param  ServiceAreaData Pointer to the 64 bytes of raw Service Area data. The
   caller must provide a pointer to the specific Service
   Area and not the start all Service Areas.

   EFI_INVALID_PARAMETER if error. Does NOT return if no error.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_BOOT_UNCONVENTIONAL_DEVICE) (
   IN EFI_LEGACY_BIOS_PROTOCOL         *This,
   IN UDC_ATTRIBUTES                   Attributes,
   IN UINTN                            BbsEntry,
   IN VOID                             *BeerData,
   IN VOID                             *ServiceAreaData
   )
 ;

 /**
   Shadow all legacy16 OPROMs that haven't been shadowed.
   Warning: Use this with caution. This routine disconnects all EFI
   drivers. If used externally then caller must re-connect EFI
   drivers.

   @retval  EFI_SUCCESS OPROMs shadowed

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_SHADOW_ALL_LEGACY_OPROMS) (
   IN EFI_LEGACY_BIOS_PROTOCOL *This
   )
 ;

 /**
   Get a region from the LegacyBios for S3 usage.

   @param  This Protocol instance pointer.
   @param  LegacyMemorySize Size of required region
   @param  Region Region to use.
   00 = Either 0xE0000 or 0xF0000 block
   Bit0 = 1 0xF0000 block
   Bit1 = 1 0xE0000 block
   @param  Alignment Address alignment. Bit mapped. First non-zero
   bit from right is alignment.
   @param  LegacyMemoryAddress Region Assigned

   @retval  EFI_SUCCESS Region assigned

   @retval  Other Region not assigned

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_GET_LEGACY_REGION) (
   IN EFI_LEGACY_BIOS_PROTOCOL *This,
   IN    UINTN                 LegacyMemorySize,
   IN    UINTN                 Region,
   IN    UINTN                 Alignment,
   OUT   VOID                  **LegacyMemoryAddress
   )
 ;

 /**
   Get a region from the LegacyBios for Tiano usage. Can only be invoked once.

   @param  This Protocol instance pointer.
   @param  LegacyMemorySize Size of data to copy
   @param  LegacyMemoryAddress Legacy Region destination address
   Note: must be in region assigned by
   LegacyBiosGetLegacyRegion
   @param  LegacyMemorySourceAddress Source of data

   @retval  EFI_SUCCESS Region assigned
   @retval  EFI_ACCESS_DENIED Destination outside assigned region

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_LEGACY_BIOS_COPY_LEGACY_REGION) (
   IN EFI_LEGACY_BIOS_PROTOCOL *This,
   IN    UINTN                 LegacyMemorySize,
   IN    VOID                  *LegacyMemoryAddress,
   IN    VOID                  *LegacyMemorySourceAddress
   )
 ;

 /**
   @par Protocol Description:
   Abstracts the traditional BIOS from the rest of EFI. The LegacyBoot()
   member function allows the BDS to support booting a traditional OS.
   EFI thunks drivers that make EFI bindings for BIOS INT services use
   all the other member functions.

   @param Int86
   Performs traditional software INT. See the Int86() function description.

   @param FarCall86
   Performs a far call into Compatibility16 or traditional OpROM code.

   @param CheckPciRom
   Checks if a traditional OpROM exists for this device.

   @param InstallPciRom
   Loads a traditional OpROM in traditional OpROM address space.

   @param LegacyBoot
   Boots a traditional OS.

   @param UpdateKeyboardLedStatus
   Updates BDA to reflect the current EFI keyboard LED status.

   @param GetBbsInfo
   Allows an external agent, such as BIOS Setup, to get the BBS data.

   @param ShadowAllLegacyOproms
   Causes all legacy OpROMs to be shadowed.

   @param PrepareToBootEfi
   Performs all actions prior to boot. Used when booting an EFI-aware OS
   rather than a legacy OS.

   @param GetLegacyRegion
   Allows EFI to reserve an area in the 0xE0000 or 0xF0000 block.

   @param CopyLegacyRegion
   Allows EFI to copy data to the area specified by GetLegacyRegion.

   @param BootUnconventionalDevice
   Allows the user to boot off an unconventional device such as a PARTIES partition.

 **/
 struct _EFI_LEGACY_BIOS_PROTOCOL {
   EFI_LEGACY_BIOS_INT86                       Int86;
   EFI_LEGACY_BIOS_FARCALL86                   FarCall86;
   EFI_LEGACY_BIOS_CHECK_ROM                   CheckPciRom;
   EFI_LEGACY_BIOS_INSTALL_ROM                 InstallPciRom;
   EFI_LEGACY_BIOS_BOOT                        LegacyBoot;
   EFI_LEGACY_BIOS_UPDATE_KEYBOARD_LED_STATUS  UpdateKeyboardLedStatus;
   EFI_LEGACY_BIOS_GET_BBS_INFO                GetBbsInfo;
   EFI_LEGACY_BIOS_PREPARE_TO_BOOT_EFI         PrepareToBootEfi;
   EFI_LEGACY_BIOS_SHADOW_ALL_LEGACY_OPROMS    ShadowAllLegacyOproms;
   EFI_LEGACY_BIOS_GET_LEGACY_REGION           GetLegacyRegion;
   EFI_LEGACY_BIOS_COPY_LEGACY_REGION          CopyLegacyRegion;
   EFI_LEGACY_BIOS_BOOT_UNCONVENTIONAL_DEVICE  BootUnconventionalDevice;
 };

 extern EFI_GUID gEfiLegacyBiosProtocolGuid;

 #endif
	/** @file
	The EFI Legacy BIOS Protocol is used to abstract legacy Option ROM usage
	under EFI and Legacy OS boot.

	Note: The names for EFI_IA32_REGISTER_SET elements were picked to follow
	well known naming conventions.

	Thunk - A thunk is a transition from one processor mode to another. A Thunk
	is a transition from native EFI mode to 16-bit mode. A reverse thunk
	would be a transition from 16-bit mode to native EFI mode.

	You most likely should not use this protocol! Find the EFI way to solve the
	problem to make your code portable

	Copyright (c) 2006, Intel Corporation
	All rights reserved. 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.

	Module Name: LegacyBios.h

	@par Revision Reference:
	This protocol is defined in Framework for EFI Compatibility Support Module spec
	Version 0.96

	**/

	#ifndef _EFI_LEGACY_BIOS_H
	#define _EFI_LEGACY_BIOS_H

	#define EFI_LEGACY_BIOS_PROTOCOL_GUID \
	{ \
	0xdb9a1e3d, 0x45cb, 0x4abb, {0x85, 0x3b, 0xe5, 0x38, 0x7f, 0xdb, 0x2e, 0x2d } \
	}

	typedef struct _EFI_LEGACY_BIOS_PROTOCOL EFI_LEGACY_BIOS_PROTOCOL;

	//
	// Convert from 32-bit address (_Adr) to Segment:Offset 16-bit form
	//
	#define EFI_SEGMENT(_Adr) (UINT16) ((UINT16) (((UINTN) (_Adr)) >> 4) & 0xf000)
	#define EFI_OFFSET(_Adr) (UINT16) (((UINT16) ((UINTN) (_Adr))) & 0xffff)
	#define BYTE_GRANULARITY 0x01
	#define WORD_GRANULARITY 0x02
	#define DWORD_GRANULARITY 0x04
	#define QWORD_GRANULARITY 0x08
	#define PARAGRAPH_GRANULARITY 0x10

	#define CARRY_FLAG 0x01

	//*********************************************************
	// EFI_EFLAGS_REG
	//*********************************************************
	typedef struct {
	UINT32 CF:1;
	UINT32 Reserved1:1;
	UINT32 PF:1;
	UINT32 Reserved2:1;
	UINT32 AF:1;
	UINT32 Reserved3:1;
	UINT32 ZF:1;
	UINT32 SF:1;
	UINT32 TF:1;
	UINT32 IF:1;
	UINT32 DF:1;
	UINT32 OF:1;
	UINT32 IOPL:2;
	UINT32 NT:1;
	UINT32 Reserved4:2;
	UINT32 VM:1;
	UINT32 Reserved5:14;
	} EFI_EFLAGS_REG;

	//*********************************************************
	// EFI_DWORD_REGS
	//*********************************************************

	typedef struct {
	UINT32 EAX;
	UINT32 EBX;
	UINT32 ECX;
	UINT32 EDX;
	UINT32 ESI;
	UINT32 EDI;
	EFI_EFLAGS_REG EFlags;
	UINT16 ES;
	UINT16 CS;
	UINT16 SS;
	UINT16 DS;
	UINT16 FS;
	UINT16 GS;
	UINT32 EBP;
	UINT32 ESP;
	} EFI_DWORD_REGS;

	//*******************************************
	// EFI_FLAGS_REG
	//*******************************************
	typedef struct {
	UINT16 CF:1;
	UINT16 Reserved1:1;
	UINT16 PF:1;
	UINT16 Reserved2:1;
	UINT16 AF:1;
	UINT16 Reserved3:1;
	UINT16 ZF:1;
	UINT16 SF:1;
	UINT16 TF:1;
	UINT16 IF:1;
	UINT16 DF:1;
	UINT16 OF:1;
	UINT16 IOPL:2;
	UINT16 NT:1;
	UINT16 Reserved4:1;
	} EFI_FLAGS_REG;


	//*********************************************************
	// EFI_WORD_REGS
	//*********************************************************

	typedef struct {
	UINT16 AX;
	UINT16 ReservedAX;
	UINT16 BX;
	UINT16 ReservedBX;
	UINT16 CX;
	UINT16 ReservedCX;
	UINT16 DX;
	UINT16 ReservedDX;
	UINT16 SI;
	UINT16 ReservedSI;
	UINT16 DI;
	UINT16 ReservedDI;
	EFI_FLAGS_REG Flags;
	UINT16 ReservedFlags;
	UINT16 ES;
	UINT16 CS;
	UINT16 SS;
	UINT16 DS;
	UINT16 FS;
	UINT16 GS;
	UINT16 BP;
	UINT16 ReservedBP;
	UINT16 SP;
	UINT16 ReservedSP;
	} EFI_WORD_REGS;

	//*********************************************************
	// EFI_BYTE_REGS
	//*********************************************************

	typedef struct {
	UINT8 AL, AH;
	UINT16 ReservedAX;
	UINT8 BL, BH;
	UINT16 ReservedBX;
	UINT8 CL, CH;
	UINT16 ReservedCX;
	UINT8 DL, DH;
	UINT16 ReservedDX;
	} EFI_BYTE_REGS;

	typedef union {
	EFI_DWORD_REGS E;
	EFI_WORD_REGS X;
	EFI_BYTE_REGS H;
	} EFI_IA32_REGISTER_SET;

	#pragma pack(1)
	//
	// $EFI table created by Legacy16 code and consumed by EFI Legacy driver
	//
	typedef struct {
	UINT32 Signature; // "$EFI"
	UINT8 TableChecksum;
	UINT8 TableLength;
	UINT8 EfiMajorRevision;
	UINT8 EfiMinorRevision;
	UINT8 TableMajorRevision;
	UINT8 TableMinorRevision;
	UINT8 Reserved[2];
	UINT16 Legacy16CallSegment;
	UINT16 Legacy16CallOffset;

	UINT16 PnPInstallationCheckSegment;
	UINT16 PnPInstallationCheckOffset;

	UINT32 EfiSystemTable;
	UINT32 OemStringPointer;
	UINT32 AcpiRsdPtrPointer;
	UINT16 OemRevision;
	UINT32 E820Pointer;
	UINT32 E820Length;
	UINT32 IrqRoutingTablePointer;
	UINT32 IrqRoutingTableLength;
	UINT32 MpTablePtr;
	UINT32 MpTableLength;
	UINT16 OemIntSegment;
	UINT16 OemIntOffset;
	UINT16 Oem32Segment;
	UINT16 Oem32Offset;
	UINT16 Oem16Segment;
	UINT16 Oem16Offset;
	UINT16 TpmSegment;
	UINT16 TpmOffset;
	UINT32 IbvPointer;
	UINT32 PciExpressBase;
	UINT8 LastPciBus;
	} EFI_COMPATIBILITY16_TABLE;
	//
	// define maximum number of HDD system supports
	//
	#define MAX_HDD_ENTRIES 0x30

	typedef struct {
	UINT16 Raw[256];
	} ATAPI_IDENTIFY;

	//
	// HDD_INFO status
	//
	#define HDD_PRIMARY 0x01
	#define HDD_SECONDARY 0x02
	#define HDD_MASTER_ATAPI_CDROM 0x04
	#define HDD_SLAVE_ATAPI_CDROM 0x08
	#define HDD_MASTER_IDE 0x20
	#define HDD_SLAVE_IDE 0x40
	#define HDD_MASTER_ATAPI_ZIPDISK 0x10
	#define HDD_SLAVE_ATAPI_ZIPDISK 0x80

	typedef struct {
	UINT16 Status;
	UINT32 Bus;
	UINT32 Device;
	UINT32 Function;
	UINT16 CommandBaseAddress;
	UINT16 ControlBaseAddress;
	UINT16 BusMasterAddress;
	UINT8 HddIrq;
	ATAPI_IDENTIFY IdentifyDrive[2];
	} HDD_INFO;

	//
	// Parties data structures
	//
	typedef struct {
	UINT8 DirectoryServiceValidity : 1;
	UINT8 RabcaUsedFlag : 1;
	UINT8 ExecuteHddDiagnosticsFlag : 1;
	UINT8 Reserved : 5;
	} UDC_ATTRIBUTES;

	typedef struct {
	UDC_ATTRIBUTES Attributes;
	UINT8 DeviceNumber;
	UINT8 BbsTableEntryNumberForParentDevice;
	UINT8 BbsTableEntryNumberForBoot;
	UINT8 BbsTableEntryNumberForHddDiag;
	UINT8 BeerData[128];
	UINT8 ServiceAreaData[64];
	} UD_TABLE;

	//
	// define BBS Device Types
	//
	#define BBS_FLOPPY 0x01
	#define BBS_HARDDISK 0x02
	#define BBS_CDROM 0x03
	#define BBS_PCMCIA 0x04
	#define BBS_USB 0x05
	#define BBS_EMBED_NETWORK 0x06
	#define BBS_BEV_DEVICE 0x80
	#define BBS_UNKNOWN 0xff

	typedef struct {
	UINT16 OldPosition : 4;
	UINT16 Reserved1 : 4;
	UINT16 Enabled : 1;
	UINT16 Failed : 1;
	UINT16 MediaPresent : 2;
	UINT16 Reserved2 : 4;
	} BBS_STATUS_FLAGS;

	#define MAX_BBS_ENTRIES 0x100
	//
	// BBS_IGNORE_ENTRY is placed in the BootPriority field if the entry is to
	// be skipped.
	// BBS_UNPRIORITIZED_ENTRY is placed in the BootPriority field before
	// priority has been assigned but indicates valid entry.
	// BBS_LOWEST_PRIORITY is normally used for removable media with no media
	// inserted. This allows the 16-bit CSM to allocate a drive letter to
	// the device.
	// BBS_DO_NOT_BOOT_FROM is used for devices that the 16-bit CSM is to assign
	// a drive letter to but never boot from.
	//
	// AdditionalIrq??Handler usage is IBV specific. The fields have been added
	// for:
	// 1. Saving non-BBS card info about IRQs taken by card.
	// 2. For BBS compliant cards that hook IRQs in order to have their SETUP
	// executed.
	//
	#define BBS_DO_NOT_BOOT_FROM 0xFFFC
	#define BBS_LOWEST_PRIORITY 0xFFFD
	#define BBS_UNPRIORITIZED_ENTRY 0xFFFE
	#define BBS_IGNORE_ENTRY 0xFFFF

	typedef struct {
	UINT16 BootPriority;
	UINT32 Bus;
	UINT32 Device;
	UINT32 Function;
	UINT8 Class;
	UINT8 SubClass;
	UINT16 MfgStringOffset;
	UINT16 MfgStringSegment;
	UINT16 DeviceType;
	BBS_STATUS_FLAGS StatusFlags;
	UINT16 BootHandlerOffset;
	UINT16 BootHandlerSegment;
	UINT16 DescStringOffset;
	UINT16 DescStringSegment;
	UINT32 InitPerReserved;
	UINT32 AdditionalIrq13Handler;
	UINT32 AdditionalIrq18Handler;
	UINT32 AdditionalIrq19Handler;
	UINT32 AdditionalIrq40Handler;
	UINT8 AssignedDriveNumber;
	UINT32 AdditionalIrq41Handler;
	UINT32 AdditionalIrq46Handler;
	UINT32 IBV1;
	UINT32 IBV2;
	} BBS_TABLE;

	#pragma pack()

	/**
	Thunk to 16-bit real mode and execute a software interrupt with a vector
	of BiosInt. Regs will contain the 16-bit register context on entry and
	exit.

	@param This Protocol instance pointer.
	@param BiosInt Processor interrupt vector to invoke
	@param Reg Register contexted passed into (and returned) from thunk to
	16-bit mode

	@retval FALSE Thunk completed, and there were no BIOS errors in the target code.
	See Regs for status.
	@retval TRUE There was a BIOS erro in the target code.

	**/
	typedef
	BOOLEAN
	(EFIAPI *EFI_LEGACY_BIOS_INT86) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN UINT8 BiosInt,
	IN OUT EFI_IA32_REGISTER_SET *Regs
	)
	;

	/**
	Thunk to 16-bit real mode and call Segment:Offset. Regs will contain the
	16-bit register context on entry and exit. Arguments can be passed on
	the Stack argument

	@param This Protocol instance pointer.
	@param Segment Segemnt of 16-bit mode call
	@param Offset Offset of 16-bit mdoe call
	@param Reg Register contexted passed into (and returned) from thunk to
	16-bit mode
	@param Stack Caller allocated stack used to pass arguments
	@param StackSize Size of Stack in bytes

	@retval FALSE Thunk completed, and there were no BIOS errors in the target code.
	See Regs for status.
	@retval TRUE There was a BIOS erro in the target code.

	**/
	typedef
	BOOLEAN
	(EFIAPI *EFI_LEGACY_BIOS_FARCALL86) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN UINT16 Segment,
	IN UINT16 Offset,
	IN EFI_IA32_REGISTER_SET *Regs,
	IN VOID *Stack,
	IN UINTN StackSize
	)
	;

	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_CHECK_ROM) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN EFI_HANDLE PciHandle,
	OUT VOID **RomImage, OPTIONAL
	OUT UINTN *RomSize, OPTIONAL
	OUT UINTN *Flags

	/**
	Test to see if a legacy PCI ROM exists for this device. Optionally return
	the Legacy ROM instance for this PCI device.

	@param This Protocol instance pointer.
	@param PciHandle The PCI PC-AT OPROM from this devices ROM BAR will be loaded
	@param RomImage Return the legacy PCI ROM for this device
	@param RomSize Size of ROM Image
	@param Flags Indicates if ROM found and if PC-AT.

	@retval EFI_SUCCESS Legacy Option ROM availible for this device
	@retval EFI_UNSUPPORTED Legacy Option ROM not supported.

	**/
	)
	;

	/**
	Load a legacy PC-AT OPROM on the PciHandle device. Return information
	about how many disks were added by the OPROM and the shadow address and
	size. DiskStart & DiskEnd are INT 13h drive letters. Thus 0x80 is C:

	@param This Protocol instance pointer.
	@param PciHandle The PCI PC-AT OPROM from this devices ROM BAR will be loaded.
	This value is NULL if RomImage is non-NULL. This is the normal
	case.
	@param RomImage A PCI PC-AT ROM image. This argument is non-NULL if there is
	no hardware associated with the ROM and thus no PciHandle,
	otherwise is must be NULL.
	Example is PXE base code.
	@param Flags Return Status if ROM was found and if was Legacy OPROM.
	@param DiskStart Disk number of first device hooked by the ROM. If DiskStart
	is the same as DiskEnd no disked were hooked.
	@param DiskEnd Disk number of the last device hooked by the ROM.
	@param RomShadowAddress Shadow address of PC-AT ROM
	@param RomShadowSize Size of RomShadowAddress in bytes

	@retval EFI_SUCCESS Thunk completed, see Regs for status.
	@retval EFI_INVALID_PARAMETER PciHandle not found

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_INSTALL_ROM) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN EFI_HANDLE PciHandle,
	IN VOID **RomImage,
	OUT UINTN *Flags,
	OUT UINT8 *DiskStart, OPTIONAL
	OUT UINT8 *DiskEnd, OPTIONAL
	OUT VOID **RomShadowAddress, OPTIONAL
	OUT UINT32 *ShadowedRomSize OPTIONAL
	)
	;

	/**
	Attempt to legacy boot the BootOption. If the EFI contexted has been
	compromised this function will not return.

	@param This Protocol instance pointer.
	@param BootOption EFI Device Path from BootXXXX variable.
	@param LoadOptionSize Size of LoadOption in size.
	@param LoadOption LoadOption from BootXXXX variable

	@retval EFI_SUCCESS Removable media not present

	**/
	/**
	Update BDA with current Scroll, Num & Cap lock LEDS

	@param This Protocol instance pointer.
	@param Leds Status of current Scroll, Num & Cap lock LEDS
	Bit 0 is Scroll Lock 0 = Not locked
	Bit 1 is Num Lock
	Bit 2 is Caps Lock

	@retval EFI_SUCCESS Removable media not present

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_BOOT) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN BBS_BBS_DEVICE_PATH *BootOption,
	IN UINT32 LoadOptionsSize,
	IN VOID *LoadOptions
	)
	;
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_UPDATE_KEYBOARD_LED_STATUS) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN UINT8 Leds
	)
	;

	/**
	Retrieve legacy BBS info and assign boot priority.

	@param This Protocol instance pointer.
	@param HddCount Number of HDD_INFO structures
	@param HddInfo Onboard IDE controller information
	@param BbsCount Number of BBS_TABLE structures
	@param BbsTable List BBS entries

	@retval EFI_SUCCESS Tables returned

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_GET_BBS_INFO) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	OUT UINT16 *HddCount,
	OUT HDD_INFO **HddInfo,
	OUT UINT16 *BbsCount,
	OUT IN BBS_TABLE **BbsTable
	)
	;

	/**
	Assign drive number to legacy HDD drives prior to booting an EFI
	aware OS so the OS can access drives without an EFI driver.

	@param This Protocol instance pointer.
	@param BbsCount Number of BBS_TABLE structures
	@param BbsTable List BBS entries

	@retval EFI_SUCCESS Drive numbers assigned

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_PREPARE_TO_BOOT_EFI) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	OUT UINT16 *BbsCount,
	OUT IN BBS_TABLE **BbsTable
	)
	;

	/**
	To boot from an unconventional device like parties and/or execute
	HDD diagnostics.

	@param This Protocol instance pointer.
	@param Attributes How to interpret the other input parameters
	@param BbsEntry The 0-based index into the BbsTable for the parent
	device.
	@param BeerData Pointer to the 128 bytes of ram BEER data.
	@param ServiceAreaData Pointer to the 64 bytes of raw Service Area data. The
	caller must provide a pointer to the specific Service
	Area and not the start all Service Areas.

	EFI_INVALID_PARAMETER if error. Does NOT return if no error.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_BOOT_UNCONVENTIONAL_DEVICE) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN UDC_ATTRIBUTES Attributes,
	IN UINTN BbsEntry,
	IN VOID *BeerData,
	IN VOID *ServiceAreaData
	)
	;

	/**
	Shadow all legacy16 OPROMs that haven't been shadowed.
	Warning: Use this with caution. This routine disconnects all EFI
	drivers. If used externally then caller must re-connect EFI
	drivers.

	@retval EFI_SUCCESS OPROMs shadowed

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_SHADOW_ALL_LEGACY_OPROMS) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This
	)
	;

	/**
	Get a region from the LegacyBios for S3 usage.

	@param This Protocol instance pointer.
	@param LegacyMemorySize Size of required region
	@param Region Region to use.
	00 = Either 0xE0000 or 0xF0000 block
	Bit0 = 1 0xF0000 block
	Bit1 = 1 0xE0000 block
	@param Alignment Address alignment. Bit mapped. First non-zero
	bit from right is alignment.
	@param LegacyMemoryAddress Region Assigned

	@retval EFI_SUCCESS Region assigned

	@retval Other Region not assigned

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_GET_LEGACY_REGION) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN UINTN LegacyMemorySize,
	IN UINTN Region,
	IN UINTN Alignment,
	OUT VOID **LegacyMemoryAddress
	)
	;

	/**
	Get a region from the LegacyBios for Tiano usage. Can only be invoked once.

	@param This Protocol instance pointer.
	@param LegacyMemorySize Size of data to copy
	@param LegacyMemoryAddress Legacy Region destination address
	Note: must be in region assigned by
	LegacyBiosGetLegacyRegion
	@param LegacyMemorySourceAddress Source of data

	@retval EFI_SUCCESS Region assigned
	@retval EFI_ACCESS_DENIED Destination outside assigned region

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_LEGACY_BIOS_COPY_LEGACY_REGION) (
	IN EFI_LEGACY_BIOS_PROTOCOL *This,
	IN UINTN LegacyMemorySize,
	IN VOID *LegacyMemoryAddress,
	IN VOID *LegacyMemorySourceAddress
	)
	;

	/**
	@par Protocol Description:
	Abstracts the traditional BIOS from the rest of EFI. The LegacyBoot()
	member function allows the BDS to support booting a traditional OS.
	EFI thunks drivers that make EFI bindings for BIOS INT services use
	all the other member functions.

	@param Int86
	Performs traditional software INT. See the Int86() function description.

	@param FarCall86
	Performs a far call into Compatibility16 or traditional OpROM code.

	@param CheckPciRom
	Checks if a traditional OpROM exists for this device.

	@param InstallPciRom
	Loads a traditional OpROM in traditional OpROM address space.

	@param LegacyBoot
	Boots a traditional OS.

	@param UpdateKeyboardLedStatus
	Updates BDA to reflect the current EFI keyboard LED status.

	@param GetBbsInfo
	Allows an external agent, such as BIOS Setup, to get the BBS data.

	@param ShadowAllLegacyOproms
	Causes all legacy OpROMs to be shadowed.

	@param PrepareToBootEfi
	Performs all actions prior to boot. Used when booting an EFI-aware OS
	rather than a legacy OS.

	@param GetLegacyRegion
	Allows EFI to reserve an area in the 0xE0000 or 0xF0000 block.

	@param CopyLegacyRegion
	Allows EFI to copy data to the area specified by GetLegacyRegion.

	@param BootUnconventionalDevice
	Allows the user to boot off an unconventional device such as a PARTIES partition.

	**/
	struct _EFI_LEGACY_BIOS_PROTOCOL {
	EFI_LEGACY_BIOS_INT86 Int86;
	EFI_LEGACY_BIOS_FARCALL86 FarCall86;
	EFI_LEGACY_BIOS_CHECK_ROM CheckPciRom;
	EFI_LEGACY_BIOS_INSTALL_ROM InstallPciRom;
	EFI_LEGACY_BIOS_BOOT LegacyBoot;
	EFI_LEGACY_BIOS_UPDATE_KEYBOARD_LED_STATUS UpdateKeyboardLedStatus;
	EFI_LEGACY_BIOS_GET_BBS_INFO GetBbsInfo;
	EFI_LEGACY_BIOS_PREPARE_TO_BOOT_EFI PrepareToBootEfi;
	EFI_LEGACY_BIOS_SHADOW_ALL_LEGACY_OPROMS ShadowAllLegacyOproms;
	EFI_LEGACY_BIOS_GET_LEGACY_REGION GetLegacyRegion;
	EFI_LEGACY_BIOS_COPY_LEGACY_REGION CopyLegacyRegion;
	EFI_LEGACY_BIOS_BOOT_UNCONVENTIONAL_DEVICE BootUnconventionalDevice;
	};

	extern EFI_GUID gEfiLegacyBiosProtocolGuid;

	#endif