OvmfPkg: remove gEfiLegacyBiosProtocolGuid

At this point, gEfiLegacyBiosProtocolGuid is unused; remove it.

This shrinks the list of resources scheduled for removal to:

- GUIDs (protocols or otherwise):
  - SYSTEM_ROM_FILE_GUID (1547B4F3-3E8A-4FEF-81C8-328ED647AB1A)
  - gEfiLegacy8259ProtocolGuid
  - gEfiLegacyInterruptProtocolGuid

- headers:
  - FrameworkDxe.h
  - Protocol/Legacy8259.h
  - Protocol/LegacyInterrupt.h

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=4588
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20231110235820.644381-26-lersek@redhat.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Corvin Köhne <corvink@FreeBSD.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

2 files changed, 0 insertions, 1552 deletions

diff --git a/OvmfPkg/Csm/Include/Protocol/LegacyBios.h b/OvmfPkg/Csm/Include/Protocol/LegacyBios.h
deleted file mode 100644
index b9a225a874..0000000000
--- a/OvmfPkg/Csm/Include/Protocol/LegacyBios.h
+++ /dev/null
@@ -1,1551 +0,0 @@
-/** @file

-  The EFI Legacy BIOS Protocol is used to abstract legacy Option ROM usage

-  under EFI and Legacy OS boot.  This file also includes all the related

-  COMPATIBILITY16 structures and definitions.

-

-  Note: The names for EFI_IA32_REGISTER_SET elements were picked to follow

-  well known naming conventions.

-

-  Thunk is the code that switches from 32-bit protected environment into the 16-bit real-mode

-  environment. Reverse thunk is the code that does the opposite.

-

-Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>

-SPDX-License-Identifier: BSD-2-Clause-Patent

-

-  @par Revision Reference:

-  This protocol is defined in Framework for EFI Compatibility Support Module spec

-  Version 0.98.

-

-**/

-

-#ifndef _EFI_LEGACY_BIOS_H_

-#define _EFI_LEGACY_BIOS_H_

-

-///

-///

-///

-#pragma pack(1)

-

-typedef UINT8  SERIAL_MODE;

-typedef UINT8  PARALLEL_MODE;

-

-#define EFI_COMPATIBILITY16_TABLE_SIGNATURE  SIGNATURE_32 ('I', 'F', 'E', '$')

-

-///

-/// There is a table located within the traditional BIOS in either the 0xF000:xxxx or 0xE000:xxxx

-/// physical address range. It is located on a 16-byte boundary and provides the physical address of the

-/// entry point for the Compatibility16 functions. These functions provide the platform-specific

-/// information that is required by the generic EfiCompatibility code. The functions are invoked via

-/// thunking by using EFI_LEGACY_BIOS_PROTOCOL.FarCall86() with the 32-bit physical

-/// entry point.

-///

-typedef struct {

-  ///

-  /// The string "$EFI" denotes the start of the EfiCompatibility table. Byte 0 is "I," byte

-  /// 1 is "F," byte 2 is "E," and byte 3 is "$" and is normally accessed as a DWORD or UINT32.

-  ///

-  UINT32    Signature;

-

-  ///

-  /// The value required such that byte checksum of TableLength equals zero.

-  ///

-  UINT8     TableChecksum;

-

-  ///

-  /// The length of this table.

-  ///

-  UINT8     TableLength;

-

-  ///

-  /// The major EFI revision for which this table was generated.

-  ///

-  UINT8     EfiMajorRevision;

-

-  ///

-  /// The minor EFI revision for which this table was generated.

-  ///

-  UINT8     EfiMinorRevision;

-

-  ///

-  /// The major revision of this table.

-  ///

-  UINT8     TableMajorRevision;

-

-  ///

-  /// The minor revision of this table.

-  ///

-  UINT8     TableMinorRevision;

-

-  ///

-  /// Reserved for future usage.

-  ///

-  UINT16    Reserved;

-

-  ///

-  /// The segment of the entry point within the traditional BIOS for Compatibility16 functions.

-  ///

-  UINT16    Compatibility16CallSegment;

-

-  ///

-  /// The offset of the entry point within the traditional BIOS for Compatibility16 functions.

-  ///

-  UINT16    Compatibility16CallOffset;

-

-  ///

-  /// The segment of the entry point within the traditional BIOS for EfiCompatibility

-  /// to invoke the PnP installation check.

-  ///

-  UINT16    PnPInstallationCheckSegment;

-

-  ///

-  /// The Offset of the entry point within the traditional BIOS for EfiCompatibility

-  /// to invoke the PnP installation check.

-  ///

-  UINT16    PnPInstallationCheckOffset;

-

-  ///

-  /// EFI system resources table. Type EFI_SYSTEM_TABLE is defined in the IntelPlatform

-  /// Innovation Framework for EFI Driver Execution Environment Core Interface Specification (DXE CIS).

-  ///

-  UINT32    EfiSystemTable;

-

-  ///

-  /// The address of an OEM-provided identifier string. The string is null terminated.

-  ///

-  UINT32    OemIdStringPointer;

-

-  ///

-  /// The 32-bit physical address where ACPI RSD PTR is stored within the traditional

-  /// BIOS. The remained of the ACPI tables are located at their EFI addresses. The size

-  /// reserved is the maximum for ACPI 2.0. The EfiCompatibility will fill in the ACPI

-  /// RSD PTR with either the ACPI 1.0b or 2.0 values.

-  ///

-  UINT32    AcpiRsdPtrPointer;

-

-  ///

-  /// The OEM revision number. Usage is undefined but provided for OEM module usage.

-  ///

-  UINT16    OemRevision;

-

-  ///

-  /// The 32-bit physical address where INT15 E820 data is stored within the traditional

-  /// BIOS. The EfiCompatibility code will fill in the E820Pointer value and copy the

-  /// data to the indicated area.

-  ///

-  UINT32    E820Pointer;

-

-  ///

-  /// The length of the E820 data and is filled in by the EfiCompatibility code.

-  ///

-  UINT32    E820Length;

-

-  ///

-  /// The 32-bit physical address where the $PIR table is stored in the traditional BIOS.

-  /// The EfiCompatibility code will fill in the IrqRoutingTablePointer value and

-  /// copy the data to the indicated area.

-  ///

-  UINT32    IrqRoutingTablePointer;

-

-  ///

-  /// The length of the $PIR table and is filled in by the EfiCompatibility code.

-  ///

-  UINT32    IrqRoutingTableLength;

-

-  ///

-  /// The 32-bit physical address where the MP table is stored in the traditional BIOS.

-  /// The EfiCompatibility code will fill in the MpTablePtr value and copy the data

-  /// to the indicated area.

-  ///

-  UINT32    MpTablePtr;

-

-  ///

-  /// The length of the MP table and is filled in by the EfiCompatibility code.

-  ///

-  UINT32    MpTableLength;

-

-  ///

-  /// The segment of the OEM-specific INT table/code.

-  ///

-  UINT16    OemIntSegment;

-

-  ///

-  /// The offset of the OEM-specific INT table/code.

-  ///

-  UINT16    OemIntOffset;

-

-  ///

-  /// The segment of the OEM-specific 32-bit table/code.

-  ///

-  UINT16    Oem32Segment;

-

-  ///

-  /// The offset of the OEM-specific 32-bit table/code.

-  ///

-  UINT16    Oem32Offset;

-

-  ///

-  /// The segment of the OEM-specific 16-bit table/code.

-  ///

-  UINT16    Oem16Segment;

-

-  ///

-  /// The offset of the OEM-specific 16-bit table/code.

-  ///

-  UINT16    Oem16Offset;

-

-  ///

-  /// The segment of the TPM binary passed to 16-bit CSM.

-  ///

-  UINT16    TpmSegment;

-

-  ///

-  /// The offset of the TPM binary passed to 16-bit CSM.

-  ///

-  UINT16    TpmOffset;

-

-  ///

-  /// A pointer to a string identifying the independent BIOS vendor.

-  ///

-  UINT32    IbvPointer;

-

-  ///

-  /// This field is NULL for all systems not supporting PCI Express. This field is the base

-  /// value of the start of the PCI Express memory-mapped configuration registers and

-  /// must be filled in prior to EfiCompatibility code issuing the Compatibility16 function

-  /// Compatibility16InitializeYourself().

-  /// Compatibility16InitializeYourself() is defined in Compatibility16

-  /// Functions.

-  ///

-  UINT32    PciExpressBase;

-

-  ///

-  /// Maximum PCI bus number assigned.

-  ///

-  UINT8     LastPciBus;

-

-  ///

-  /// Start Address of Upper Memory Area (UMA) to be set as Read/Write. If

-  /// UmaAddress is a valid address in the shadow RAM, it also indicates that the region

-  /// from 0xC0000 to (UmaAddress - 1) can be used for Option ROM.

-  ///

-  UINT32    UmaAddress;

-

-  ///

-  /// Upper Memory Area size in bytes to be set as Read/Write. If zero, no UMA region

-  /// will be set as Read/Write (i.e. all Shadow RAM is set as Read-Only).

-  ///

-  UINT32    UmaSize;

-

-  ///

-  /// Start Address of high memory that can be used for permanent allocation. If zero,

-  /// high memory is not available for permanent allocation.

-  ///

-  UINT32    HiPermanentMemoryAddress;

-

-  ///

-  /// Size of high memory that can be used for permanent allocation in bytes. If zero,

-  /// high memory is not available for permanent allocation.

-  ///

-  UINT32    HiPermanentMemorySize;

-} EFI_COMPATIBILITY16_TABLE;

-

-///

-/// Functions provided by the CSM binary which communicate between the EfiCompatibility

-/// and Compatibility16 code.

-///

-/// Inconsistent with the specification here:

-/// The member's name started with "Compatibility16" [defined in Intel Framework

-/// Compatibility Support Module Specification / 0.97 version]

-/// has been changed to "Legacy16" since keeping backward compatible.

-///

-typedef enum {

-  ///

-  /// Causes the Compatibility16 code to do any internal initialization required.

-  /// Input:

-  ///   AX = Compatibility16InitializeYourself

-  ///   ES:BX = Pointer to EFI_TO_COMPATIBILITY16_INIT_TABLE

-  /// Return:

-  ///   AX = Return Status codes

-  ///

-  Legacy16InitializeYourself = 0x0000,

-

-  ///

-  /// Causes the Compatibility16 BIOS to perform any drive number translations to match the boot sequence.

-  /// Input:

-  ///   AX = Compatibility16UpdateBbs

-  ///   ES:BX = Pointer to EFI_TO_COMPATIBILITY16_BOOT_TABLE

-  /// Return:

-  ///   AX = Returned status codes

-  ///

-  Legacy16UpdateBbs = 0x0001,

-

-  ///

-  /// Allows the Compatibility16 code to perform any final actions before booting. The Compatibility16

-  /// code is read/write.

-  /// Input:

-  ///   AX = Compatibility16PrepareToBoot

-  ///   ES:BX = Pointer to EFI_TO_COMPATIBILITY16_BOOT_TABLE structure

-  /// Return:

-  ///   AX = Returned status codes

-  ///

-  Legacy16PrepareToBoot = 0x0002,

-

-  ///

-  /// Causes the Compatibility16 BIOS to boot. The Compatibility16 code is Read/Only.

-  /// Input:

-  ///   AX = Compatibility16Boot

-  /// Output:

-  ///   AX = Returned status codes

-  ///

-  Legacy16Boot = 0x0003,

-

-  ///

-  /// Allows the Compatibility16 code to get the last device from which a boot was attempted. This is

-  /// stored in CMOS and is the priority number of the last attempted boot device.

-  /// Input:

-  ///   AX = Compatibility16RetrieveLastBootDevice

-  /// Output:

-  ///   AX = Returned status codes

-  ///   BX = Priority number of the boot device.

-  ///

-  Legacy16RetrieveLastBootDevice = 0x0004,

-

-  ///

-  /// Allows the Compatibility16 code rehook INT13, INT18, and/or INT19 after dispatching a legacy OpROM.

-  /// Input:

-  ///   AX = Compatibility16DispatchOprom

-  ///   ES:BX = Pointer to EFI_DISPATCH_OPROM_TABLE

-  /// Output:

-  ///   AX = Returned status codes

-  ///   BX = Number of non-BBS-compliant devices found. Equals 0 if BBS compliant.

-  ///

-  Legacy16DispatchOprom = 0x0005,

-

-  ///

-  /// Finds a free area in the 0xFxxxx or 0xExxxx region of the specified length and returns the address

-  /// of that region.

-  /// Input:

-  ///   AX = Compatibility16GetTableAddress

-  ///   BX = Allocation region

-  ///       00 = Allocate from either 0xE0000 or 0xF0000 64 KB blocks.

-  ///       Bit 0 = 1 Allocate from 0xF0000 64 KB block

-  ///       Bit 1 = 1 Allocate from 0xE0000 64 KB block

-  ///   CX = Requested length in bytes.

-  ///   DX = Required address alignment. Bit mapped. First non-zero bit from the right is the alignment.

-  /// Output:

-  ///   AX = Returned status codes

-  ///   DS:BX = Address of the region

-  ///

-  Legacy16GetTableAddress = 0x0006,

-

-  ///

-  /// Enables the EfiCompatibility module to do any nonstandard processing of keyboard LEDs or state.

-  /// Input:

-  ///   AX = Compatibility16SetKeyboardLeds

-  ///   CL = LED status.

-  ///     Bit 0  Scroll Lock 0 = Off

-  ///     Bit 1  NumLock

-  ///     Bit 2  Caps Lock

-  /// Output:

-  ///     AX = Returned status codes

-  ///

-  Legacy16SetKeyboardLeds = 0x0007,

-

-  ///

-  /// Enables the EfiCompatibility module to install an interrupt handler for PCI mass media devices that

-  /// do not have an OpROM associated with them. An example is SATA.

-  /// Input:

-  ///   AX = Compatibility16InstallPciHandler

-  ///   ES:BX = Pointer to EFI_LEGACY_INSTALL_PCI_HANDLER structure

-  /// Output:

-  ///   AX = Returned status codes

-  ///

-  Legacy16InstallPciHandler = 0x0008

-} EFI_COMPATIBILITY_FUNCTIONS;

-

-///

-/// EFI_DISPATCH_OPROM_TABLE

-///

-typedef struct {

-  UINT16    PnPInstallationCheckSegment; ///< A pointer to the PnpInstallationCheck data structure.

-  UINT16    PnPInstallationCheckOffset;  ///< A pointer to the PnpInstallationCheck data structure.

-  UINT16    OpromSegment;                ///< The segment where the OpROM was placed. Offset is assumed to be 3.

-  UINT8     PciBus;                      ///< The PCI bus.

-  UINT8     PciDeviceFunction;           ///< The PCI device * 0x08 | PCI function.

-  UINT8     NumberBbsEntries;            ///< The number of valid BBS table entries upon entry and exit. The IBV code may

-                                         ///< increase this number, if BBS-compliant devices also hook INTs in order to force the

-                                         ///< OpROM BIOS Setup to be executed.

-  UINT32    BbsTablePointer;             ///< A pointer to the BBS table.

-  UINT16    RuntimeSegment;              ///< The segment where the OpROM can be relocated to. If this value is 0x0000, this

-                                         ///< means that the relocation of this run time code is not supported.

-                                         ///< Inconsistent with specification here:

-                                         ///< The member's name "OpromDestinationSegment" [defined in Intel Framework Compatibility Support Module Specification / 0.97 version]

-                                         ///< has been changed to "RuntimeSegment" since keeping backward compatible.

-} EFI_DISPATCH_OPROM_TABLE;

-

-///

-/// EFI_TO_COMPATIBILITY16_INIT_TABLE

-///

-typedef struct {

-  ///

-  /// Starting address of memory under 1 MB. The ending address is assumed to be 640 KB or 0x9FFFF.

-  ///

-  UINT32    BiosLessThan1MB;

-

-  ///

-  /// The starting address of the high memory block.

-  ///

-  UINT32    HiPmmMemory;

-

-  ///

-  /// The length of high memory block.

-  ///

-  UINT32    HiPmmMemorySizeInBytes;

-

-  ///

-  /// The segment of the reverse thunk call code.

-  ///

-  UINT16    ReverseThunkCallSegment;

-

-  ///

-  /// The offset of the reverse thunk call code.

-  ///

-  UINT16    ReverseThunkCallOffset;

-

-  ///

-  /// The number of E820 entries copied to the Compatibility16 BIOS.

-  ///

-  UINT32    NumberE820Entries;

-

-  ///

-  /// The amount of usable memory above 1 MB, e.g., E820 type 1 memory.

-  ///

-  UINT32    OsMemoryAbove1Mb;

-

-  ///

-  /// The start of thunk code in main memory. Memory cannot be used by BIOS or PMM.

-  ///

-  UINT32    ThunkStart;

-

-  ///

-  /// The size of the thunk code.

-  ///

-  UINT32    ThunkSizeInBytes;

-

-  ///

-  /// Starting address of memory under 1 MB.

-  ///

-  UINT32    LowPmmMemory;

-

-  ///

-  /// The length of low Memory block.

-  ///

-  UINT32    LowPmmMemorySizeInBytes;

-} EFI_TO_COMPATIBILITY16_INIT_TABLE;

-

-///

-/// DEVICE_PRODUCER_SERIAL.

-///

-typedef struct {

-  UINT16         Address;                       ///< I/O address assigned to the serial port.

-  UINT8          Irq;                           ///< IRQ assigned to the serial port.

-  SERIAL_MODE    Mode;                          ///< Mode of serial port. Values are defined below.

-} DEVICE_PRODUCER_SERIAL;

-

-///

-/// DEVICE_PRODUCER_SERIAL's modes.

-///@{

-#define DEVICE_SERIAL_MODE_NORMAL       0x00

-#define DEVICE_SERIAL_MODE_IRDA         0x01

-#define DEVICE_SERIAL_MODE_ASK_IR       0x02

-#define DEVICE_SERIAL_MODE_DUPLEX_HALF  0x00

-#define DEVICE_SERIAL_MODE_DUPLEX_FULL  0x10

-/// @)

-

-///

-/// DEVICE_PRODUCER_PARALLEL.

-///

-typedef struct {

-  UINT16           Address;                   ///< I/O address assigned to the parallel port.

-  UINT8            Irq;                       ///< IRQ assigned to the parallel port.

-  UINT8            Dma;                       ///< DMA assigned to the parallel port.

-  PARALLEL_MODE    Mode;                      ///< Mode of the parallel port. Values are defined below.

-} DEVICE_PRODUCER_PARALLEL;

-

-///

-/// DEVICE_PRODUCER_PARALLEL's modes.

-///@{

-#define DEVICE_PARALLEL_MODE_MODE_OUTPUT_ONLY    0x00

-#define DEVICE_PARALLEL_MODE_MODE_BIDIRECTIONAL  0x01

-#define DEVICE_PARALLEL_MODE_MODE_EPP            0x02

-#define DEVICE_PARALLEL_MODE_MODE_ECP            0x03

-///@}

-

-///

-/// DEVICE_PRODUCER_FLOPPY

-///

-typedef struct {

-  UINT16    Address;                                  ///< I/O address assigned to the floppy.

-  UINT8     Irq;                                      ///< IRQ assigned to the floppy.

-  UINT8     Dma;                                      ///< DMA assigned to the floppy.

-  UINT8     NumberOfFloppy;                           ///< Number of floppies in the system.

-} DEVICE_PRODUCER_FLOPPY;

-

-///

-/// LEGACY_DEVICE_FLAGS

-///

-typedef struct {

-  UINT32    A20Kybd   : 1;                            ///< A20 controller by keyboard controller.

-  UINT32    A20Port90 : 1;                            ///< A20 controlled by port 0x92.

-  UINT32    Reserved  : 30;                           ///< Reserved for future usage.

-} LEGACY_DEVICE_FLAGS;

-

-///

-/// DEVICE_PRODUCER_DATA_HEADER

-///

-typedef struct {

-  DEVICE_PRODUCER_SERIAL      Serial[4];            ///< Data for serial port x. Type DEVICE_PRODUCER_SERIAL is defined below.

-  DEVICE_PRODUCER_PARALLEL    Parallel[3];          ///< Data for parallel port x. Type DEVICE_PRODUCER_PARALLEL is defined below.

-  DEVICE_PRODUCER_FLOPPY      Floppy;               ///< Data for floppy. Type DEVICE_PRODUCER_FLOPPY is defined below.

-  UINT8                       MousePresent;         ///< Flag to indicate if mouse is present.

-  LEGACY_DEVICE_FLAGS         Flags;                ///< Miscellaneous Boolean state information passed to CSM.

-} DEVICE_PRODUCER_DATA_HEADER;

-

-///

-/// ATAPI_IDENTIFY

-///

-typedef struct {

-  UINT16    Raw[256];                             ///< Raw data from the IDE IdentifyDrive command.

-} ATAPI_IDENTIFY;

-

-///

-/// HDD_INFO

-///

-typedef struct {

-  ///

-  /// Status of IDE device. Values are defined below. There is one HDD_INFO structure

-  /// per IDE controller. The IdentifyDrive is per drive. Index 0 is master and index

-  /// 1 is slave.

-  ///

-  UINT16            Status;

-

-  ///

-  /// PCI bus of IDE controller.

-  ///

-  UINT32            Bus;

-

-  ///

-  /// PCI device of IDE controller.

-  ///

-  UINT32            Device;

-

-  ///

-  /// PCI function of IDE controller.

-  ///

-  UINT32            Function;

-

-  ///

-  /// Command ports base address.

-  ///

-  UINT16            CommandBaseAddress;

-

-  ///

-  /// Control ports base address.

-  ///

-  UINT16            ControlBaseAddress;

-

-  ///

-  /// Bus master address.

-  ///

-  UINT16            BusMasterAddress;

-

-  UINT8             HddIrq;

-

-  ///

-  /// Data that identifies the drive data; one per possible attached drive.

-  ///

-  ATAPI_IDENTIFY    IdentifyDrive[2];

-} HDD_INFO;

-

-///

-/// HDD_INFO status bits

-///

-#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

-

-///

-/// BBS_STATUS_FLAGS;\.

-///

-typedef struct {

-  UINT16    OldPosition : 4;                            ///< Prior priority.

-  UINT16    Reserved1   : 4;                            ///< Reserved for future use.

-  UINT16    Enabled     : 1;                            ///< If 0, ignore this entry.

-  UINT16    Failed      : 1;                            ///< 0 = Not known if boot failure occurred.

-                                                        ///< 1 = Boot attempted failed.

-

-  ///

-  /// State of media present.

-  ///   00 = No bootable media is present in the device.

-  ///   01 = Unknown if a bootable media present.

-  ///   10 = Media is present and appears bootable.

-  ///   11 = Reserved.

-  ///

-  UINT16    MediaPresent : 2;

-  UINT16    Reserved2    : 4;                           ///< Reserved for future use.

-} BBS_STATUS_FLAGS;

-

-///

-/// BBS_TABLE, device type values & boot priority values.

-///

-typedef struct {

-  ///

-  /// The boot priority for this boot device. Values are defined below.

-  ///

-  UINT16              BootPriority;

-

-  ///

-  /// The PCI bus for this boot device.

-  ///

-  UINT32              Bus;

-

-  ///

-  /// The PCI device for this boot device.

-  ///

-  UINT32              Device;

-

-  ///

-  /// The PCI function for the boot device.

-  ///

-  UINT32              Function;

-

-  ///

-  /// The PCI class for this boot device.

-  ///

-  UINT8               Class;

-

-  ///

-  /// The PCI Subclass for this boot device.

-  ///

-  UINT8               SubClass;

-

-  ///

-  /// Segment:offset address of an ASCIIZ description string describing the manufacturer.

-  ///

-  UINT16              MfgStringOffset;

-

-  ///

-  /// Segment:offset address of an ASCIIZ description string describing the manufacturer.

-  ///

-  UINT16              MfgStringSegment;

-

-  ///

-  /// BBS device type. BBS device types are defined below.

-  ///

-  UINT16              DeviceType;

-

-  ///

-  /// Status of this boot device. Type BBS_STATUS_FLAGS is defined below.

-  ///

-  BBS_STATUS_FLAGS    StatusFlags;

-

-  ///

-  /// Segment:Offset address of boot loader for IPL devices or install INT13 handler for

-  /// BCV devices.

-  ///

-  UINT16              BootHandlerOffset;

-

-  ///

-  /// Segment:Offset address of boot loader for IPL devices or install INT13 handler for

-  /// BCV devices.

-  ///

-  UINT16              BootHandlerSegment;

-

-  ///

-  /// Segment:offset address of an ASCIIZ description string describing this device.

-  ///

-  UINT16              DescStringOffset;

-

-  ///

-  /// Segment:offset address of an ASCIIZ description string describing this device.

-  ///

-  UINT16              DescStringSegment;

-

-  ///

-  /// Reserved.

-  ///

-  UINT32              InitPerReserved;

-

-  ///

-  /// The use of these fields is IBV dependent. They can be used to flag that an OpROM

-  /// has hooked the specified IRQ. The OpROM may be BBS compliant as some SCSI

-  /// BBS-compliant OpROMs also hook IRQ vectors in order to run their BIOS Setup

-  ///

-  UINT32              AdditionalIrq13Handler;

-

-  ///

-  /// The use of these fields is IBV dependent. They can be used to flag that an OpROM

-  /// has hooked the specified IRQ. The OpROM may be BBS compliant as some SCSI

-  /// BBS-compliant OpROMs also hook IRQ vectors in order to run their BIOS Setup

-  ///

-  UINT32              AdditionalIrq18Handler;

-

-  ///

-  /// The use of these fields is IBV dependent. They can be used to flag that an OpROM

-  /// has hooked the specified IRQ. The OpROM may be BBS compliant as some SCSI

-  /// BBS-compliant OpROMs also hook IRQ vectors in order to run their BIOS Setup

-  ///

-  UINT32              AdditionalIrq19Handler;

-

-  ///

-  /// The use of these fields is IBV dependent. They can be used to flag that an OpROM

-  /// has hooked the specified IRQ. The OpROM may be BBS compliant as some SCSI

-  /// BBS-compliant OpROMs also hook IRQ vectors in order to run their BIOS Setup

-  ///

-  UINT32              AdditionalIrq40Handler;

-  UINT8               AssignedDriveNumber;

-  UINT32              AdditionalIrq41Handler;

-  UINT32              AdditionalIrq46Handler;

-  UINT32              IBV1;

-  UINT32              IBV2;

-} BBS_TABLE;

-

-///

-/// BBS device type values

-///@{

-#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

-///@}

-

-///

-/// BBS boot priority values

-///@{

-#define BBS_DO_NOT_BOOT_FROM     0xFFFC

-#define BBS_LOWEST_PRIORITY      0xFFFD

-#define BBS_UNPRIORITIZED_ENTRY  0xFFFE

-#define BBS_IGNORE_ENTRY         0xFFFF

-///@}

-

-///

-/// SMM_ATTRIBUTES

-///

-typedef struct {

-  ///

-  /// Access mechanism used to generate the soft SMI. Defined types are below. The other

-  /// values are reserved for future usage.

-  ///

-  UINT16    Type            : 3;

-

-  ///

-  /// The size of "port" in bits. Defined values are below.

-  ///

-  UINT16    PortGranularity : 3;

-

-  ///

-  /// The size of data in bits. Defined values are below.

-  ///

-  UINT16    DataGranularity : 3;

-

-  ///

-  /// Reserved for future use.

-  ///

-  UINT16    Reserved        : 7;

-} SMM_ATTRIBUTES;

-

-///

-/// SMM_ATTRIBUTES type values.

-///@{

-#define STANDARD_IO      0x00

-#define STANDARD_MEMORY  0x01

-///@}

-

-///

-/// SMM_ATTRIBUTES port size constants.

-///@{

-#define PORT_SIZE_8   0x00

-#define PORT_SIZE_16  0x01

-#define PORT_SIZE_32  0x02

-#define PORT_SIZE_64  0x03

-///@}

-

-///

-/// SMM_ATTRIBUTES data size constants.

-///@{

-#define DATA_SIZE_8   0x00

-#define DATA_SIZE_16  0x01

-#define DATA_SIZE_32  0x02

-#define DATA_SIZE_64  0x03

-///@}

-

-///

-/// SMM_FUNCTION & relating constants.

-///

-typedef struct {

-  UINT16    Function : 15;

-  UINT16    Owner    : 1;

-} SMM_FUNCTION;

-

-///

-/// SMM_FUNCTION Function constants.

-///@{

-#define INT15_D042         0x0000

-#define GET_USB_BOOT_INFO  0x0001

-#define DMI_PNP_50_57      0x0002

-///@}

-

-///

-/// SMM_FUNCTION Owner constants.

-///@{

-#define STANDARD_OWNER  0x0

-#define OEM_OWNER       0x1

-///@}

-

-///

-/// This structure assumes both port and data sizes are 1. SmmAttribute must be

-/// properly to reflect that assumption.

-///

-typedef struct {

-  ///

-  /// Describes the access mechanism, SmmPort, and SmmData sizes. Type

-  /// SMM_ATTRIBUTES is defined below.

-  ///

-  SMM_ATTRIBUTES    SmmAttributes;

-

-  ///

-  /// Function Soft SMI is to perform. Type SMM_FUNCTION is defined below.

-  ///

-  SMM_FUNCTION      SmmFunction;

-

-  ///

-  /// SmmPort size depends upon SmmAttributes and ranges from2 bytes to 16 bytes.

-  ///

-  UINT8             SmmPort;

-

-  ///

-  /// SmmData size depends upon SmmAttributes and ranges from2 bytes to 16 bytes.

-  ///

-  UINT8             SmmData;

-} SMM_ENTRY;

-

-///

-/// SMM_TABLE

-///

-typedef struct {

-  UINT16       NumSmmEntries;                         ///< Number of entries represented by SmmEntry.

-  SMM_ENTRY    SmmEntry;                              ///< One entry per function. Type SMM_ENTRY is defined below.

-} SMM_TABLE;

-

-///

-/// UDC_ATTRIBUTES

-///

-typedef struct {

-  ///

-  /// This bit set indicates that the ServiceAreaData is valid.

-  ///

-  UINT8    DirectoryServiceValidity  : 1;

-

-  ///

-  /// This bit set indicates to use the Reserve Area Boot Code Address (RACBA) only if

-  /// DirectoryServiceValidity is 0.

-  ///

-  UINT8    RabcaUsedFlag             : 1;

-

-  ///

-  /// This bit set indicates to execute hard disk diagnostics.

-  ///

-  UINT8    ExecuteHddDiagnosticsFlag : 1;

-

-  ///

-  /// Reserved for future use. Set to 0.

-  ///

-  UINT8    Reserved                  : 5;

-} UDC_ATTRIBUTES;

-

-///

-/// UD_TABLE

-///

-typedef struct {

-  ///

-  /// This field contains the bit-mapped attributes of the PARTIES information. Type

-  /// UDC_ATTRIBUTES is defined below.

-  ///

-  UDC_ATTRIBUTES    Attributes;

-

-  ///

-  /// This field contains the zero-based device on which the selected

-  /// ServiceDataArea is present. It is 0 for master and 1 for the slave device.

-  ///

-  UINT8             DeviceNumber;

-

-  ///

-  /// This field contains the zero-based index into the BbsTable for the parent device.

-  /// This index allows the user to reference the parent device information such as PCI

-  /// bus, device function.

-  ///

-  UINT8             BbsTableEntryNumberForParentDevice;

-

-  ///

-  /// This field contains the zero-based index into the BbsTable for the boot entry.

-  ///

-  UINT8             BbsTableEntryNumberForBoot;

-

-  ///

-  /// This field contains the zero-based index into the BbsTable for the HDD diagnostics entry.

-  ///

-  UINT8             BbsTableEntryNumberForHddDiag;

-

-  ///

-  /// The raw Beer data.

-  ///

-  UINT8             BeerData[128];

-

-  ///

-  /// The raw data of selected service area.

-  ///

-  UINT8             ServiceAreaData[64];

-} UD_TABLE;

-

-#define EFI_TO_LEGACY_MAJOR_VERSION  0x02

-#define EFI_TO_LEGACY_MINOR_VERSION  0x00

-#define MAX_IDE_CONTROLLER           8

-

-///

-/// EFI_TO_COMPATIBILITY16_BOOT_TABLE

-///

-typedef struct {

-  UINT16                         MajorVersion;                    ///< The EfiCompatibility major version number.

-  UINT16                         MinorVersion;                    ///< The EfiCompatibility minor version number.

-  UINT32                         AcpiTable;                       ///< The location of the RSDT ACPI table. < 4G range.

-  UINT32                         SmbiosTable;                     ///< The location of the SMBIOS table in EFI memory. < 4G range.

-  UINT32                         SmbiosTableLength;

-  //

-  // Legacy SIO state

-  //

-  DEVICE_PRODUCER_DATA_HEADER    SioData;                         ///< Standard traditional device information.

-  UINT16                         DevicePathType;                  ///< The default boot type.

-  UINT16                         PciIrqMask;                      ///< Mask of which IRQs have been assigned to PCI.

-  UINT32                         NumberE820Entries;               ///< Number of E820 entries. The number can change from the

-                                                                  ///< Compatibility16InitializeYourself() function.

-  //

-  // Controller & Drive Identify[2] per controller information

-  //

-  HDD_INFO                       HddInfo[MAX_IDE_CONTROLLER];     ///< Hard disk drive information, including raw Identify Drive data.

-  UINT32                         NumberBbsEntries;                ///< Number of entries in the BBS table

-  UINT32                         BbsTable;                        ///< A pointer to the BBS table. Type BBS_TABLE is defined below.

-  UINT32                         SmmTable;                        ///< A pointer to the SMM table. Type SMM_TABLE is defined below.

-  UINT32                         OsMemoryAbove1Mb;                ///< The amount of usable memory above 1 MB, i.e. E820 type 1 memory. This value can

-                                                                  ///< differ from the value in EFI_TO_COMPATIBILITY16_INIT_TABLE as more

-                                                                  ///< memory may have been discovered.

-  UINT32                         UnconventionalDeviceTable;       ///< Information to boot off an unconventional device like a PARTIES partition. Type

-                                                                  ///< UD_TABLE is defined below.

-} EFI_TO_COMPATIBILITY16_BOOT_TABLE;

-

-///

-/// EFI_LEGACY_INSTALL_PCI_HANDLER

-///

-typedef struct {

-  UINT8     PciBus;                                     ///< The PCI bus of the device.

-  UINT8     PciDeviceFun;                               ///< The PCI device in bits 7:3 and function in bits 2:0.

-  UINT8     PciSegment;                                 ///< The PCI segment of the device.

-  UINT8     PciClass;                                   ///< The PCI class code of the device.

-  UINT8     PciSubclass;                                ///< The PCI subclass code of the device.

-  UINT8     PciInterface;                               ///< The PCI interface code of the device.

-  //

-  // Primary section

-  //

-  UINT8     PrimaryIrq;                                 ///< The primary device IRQ.

-  UINT8     PrimaryReserved;                            ///< Reserved.

-  UINT16    PrimaryControl;                             ///< The primary device control I/O base.

-  UINT16    PrimaryBase;                                ///< The primary device I/O base.

-  UINT16    PrimaryBusMaster;                           ///< The primary device bus master I/O base.

-  //

-  // Secondary Section

-  //

-  UINT8     SecondaryIrq;                               ///< The secondary device IRQ.

-  UINT8     SecondaryReserved;                          ///< Reserved.

-  UINT16    SecondaryControl;                           ///< The secondary device control I/O base.

-  UINT16    SecondaryBase;                              ///< The secondary device I/O base.

-  UINT16    SecondaryBusMaster;                         ///< The secondary device bus master I/O base.

-} EFI_LEGACY_INSTALL_PCI_HANDLER;

-

-//

-// Restore default pack value

-//

-#pragma pack()

-

-#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;

-

-///

-/// Flags returned by CheckPciRom().

-///

-#define NO_ROM            0x00

-#define ROM_FOUND         0x01

-#define VALID_LEGACY_ROM  0x02

-#define ROM_WITH_CONFIG   0x04     ///< Not defined in the Framework CSM Specification.

-

-///

-/// The following macros do not appear in the Framework CSM Specification and

-/// are kept for backward compatibility only.  They convert 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 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;

-

-///

-/// EFI_IA32_REGISTER_SET

-///

-typedef union {

-  EFI_DWORD_REGS    E;

-  EFI_WORD_REGS     X;

-  EFI_BYTE_REGS     H;

-} EFI_IA32_REGISTER_SET;

-

-/**

-  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[in]     This      The protocol instance pointer.

-  @param[in]     BiosInt   The processor interrupt vector to invoke.

-  @param[in,out] Reg       Register contexted passed into (and returned) from thunk to

-                           16-bit mode.

-

-  @retval TRUE                Thunk completed with no BIOS errors in the target code. See Regs for status.

-  @retval FALSE                  There was a BIOS error 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[in] This        The protocol instance pointer.

-  @param[in] Segment     The segemnt of 16-bit mode call.

-  @param[in] Offset      The offset of 16-bit mdoe call.

-  @param[in] Reg         Register contexted passed into (and returned) from thunk to

-                         16-bit mode.

-  @param[in] Stack       The caller allocated stack used to pass arguments.

-  @param[in] StackSize   The size of Stack in bytes.

-

-  @retval FALSE                 Thunk completed with no BIOS errors in the target code.                                See Regs for status.  @retval TRUE                  There was a BIOS error 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

-  );

-

-/**

-  Test to see if a legacy PCI ROM exists for this device. Optionally return

-  the Legacy ROM instance for this PCI device.

-

-  @param[in]  This        The protocol instance pointer.

-  @param[in]  PciHandle   The PCI PC-AT OPROM from this devices ROM BAR will be loaded

-  @param[out] RomImage    Return the legacy PCI ROM for this device.

-  @param[out] RomSize     The size of ROM Image.

-  @param[out] Flags       Indicates if ROM found and if PC-AT. Multiple bits can be set as follows:

-                            - 00 = No ROM.

-                            - 01 = ROM Found.

-                            - 02 = ROM is a valid legacy ROM.

-

-  @retval EFI_SUCCESS       The Legacy Option ROM available for this device

-  @retval EFI_UNSUPPORTED   The Legacy Option ROM is not supported.

-

-**/

-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

-  );

-

-/**

-  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[in]  This               The protocol instance pointer.

-  @param[in]  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[in]  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[out] Flags              The type of ROM discovered. Multiple bits can be set, as follows:

-                                   - 00 = No ROM.

-                                   - 01 = ROM found.

-                                   - 02 = ROM is a valid legacy ROM.

-  @param[out] DiskStart          The disk number of first device hooked by the ROM. If DiskStart

-                                 is the same as DiskEnd no disked were hooked.

-  @param[out] DiskEnd            disk number of the last device hooked by the ROM.

-  @param[out] RomShadowAddress   Shadow address of PC-AT ROM.

-  @param[out] 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

-  );

-

-/**

-  This function attempts to traditionally boot the specified BootOption. If the EFI context has

-  been compromised, this function will not return. This procedure is not used for loading an EFI-aware

-  OS off a traditional device. The following actions occur:

-  - Get EFI SMBIOS data structures, convert them to a traditional format, and copy to

-    Compatibility16.

-  - Get a pointer to ACPI data structures and copy the Compatibility16 RSD PTR to F0000 block.

-  - Find the traditional SMI handler from a firmware volume and register the traditional SMI

-    handler with the EFI SMI handler.

-  - Build onboard IDE information and pass this information to the Compatibility16 code.

-  - Make sure all PCI Interrupt Line registers are programmed to match 8259.

-  - Reconfigure SIO devices from EFI mode (polled) into traditional mode (interrupt driven).

-  - Shadow all PCI ROMs.

-  - Set up BDA and EBDA standard areas before the legacy boot.

-  - Construct the Compatibility16 boot memory map and pass it to the Compatibility16 code.

-  - Invoke the Compatibility16 table function Compatibility16PrepareToBoot(). This

-    invocation causes a thunk into the Compatibility16 code, which sets all appropriate internal

-    data structures. The boot device list is a parameter.

-  - Invoke the Compatibility16 Table function Compatibility16Boot(). This invocation

-    causes a thunk into the Compatibility16 code, which does an INT19.

-  - If the Compatibility16Boot() function returns, then the boot failed in a graceful

-    manner--meaning that the EFI code is still valid. An ungraceful boot failure causes a reset because the state

-    of EFI code is unknown.

-

-  @param[in] This             The protocol instance pointer.

-  @param[in] BootOption       The EFI Device Path from BootXXXX variable.

-  @param[in] LoadOptionSize   The size of LoadOption in size.

-  @param[in] LoadOption       LThe oadOption from BootXXXX variable.

-

-  @retval EFI_DEVICE_ERROR      Failed to boot from any boot device and memory is uncorrupted.                                Note: This function normally does not returns. It will either boot the                                OS or reset the system if memory has been "corrupted" by loading                                a boot sector and passing control to it.

-**/

-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

-  );

-

-/**

-  This function takes the Leds input parameter and sets/resets the BDA accordingly.

-  Leds is also passed to Compatibility16 code, in case any special processing is required.

-  This function is normally called from EFI Setup drivers that handle user-selectable

-  keyboard options such as boot with NUM LOCK on/off. This function does not

-  touch the keyboard or keyboard LEDs but only the BDA.

-

-  @param[in] This   The protocol instance pointer.

-  @param[in] Leds   The 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   The BDA was updated successfully.

-

-**/

-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[in]     This       The protocol instance pointer.

-  @param[out]    HddCount   The number of HDD_INFO structures.

-  @param[out]    HddInfo    Onboard IDE controller information.

-  @param[out]    BbsCount   The number of BBS_TABLE structures.

-  @param[in,out] BbsTable   Points to List of BBS_TABLE.

-

-  @retval EFI_SUCCESS   Tables were 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,

-  IN OUT 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[in]  This       The protocol instance pointer.

-  @param[out] BbsCount   The number of BBS_TABLE structures

-  @param[out] BbsTable   List of 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 BBS_TABLE                 **BbsTable

-  );

-

-/**

-  To boot from an unconventional device like parties and/or execute

-  HDD diagnostics.

-

-  @param[in]  This              The protocol instance pointer.

-  @param[in]  Attributes        How to interpret the other input parameters.

-  @param[in]  BbsEntry          The 0-based index into the BbsTable for the parent

-                                device.

-  @param[in]  BeerData          A pointer to the 128 bytes of ram BEER data.

-  @param[in]  ServiceAreaData   A 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.

-

-  @retval 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  the caller must re-connect EFI

-  drivers.

-

-  @param[in]  This   The protocol instance pointer.

-

-  @retval EFI_SUCCESS   OPROMs were 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[in]  This                  The protocol instance pointer.

-  @param[in]  LegacyMemorySize      The size of required region.

-  @param[in]  Region                The region to use.

-                                    00 = Either 0xE0000 or 0xF0000 block.

-                                      - Bit0 = 1 0xF0000 block.

-                                      - Bit1 = 1 0xE0000 block.

-  @param[in]  Alignment             Address alignment. Bit mapped. The first non-zero

-                                    bit from right is alignment.

-  @param[out] LegacyMemoryAddress   The Region Assigned

-

-  @retval EFI_SUCCESS           The Region was assigned.

-  @retval EFI_ACCESS_DENIED     The function was previously invoked.

-  @retval Other                 The Region was 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[in]  This                        The protocol instance pointer.

-  @param[in]  LegacyMemorySize            The size of data to copy.

-  @param[in]  LegacyMemoryAddress         The Legacy Region destination address.

-                                          Note: must be in region assigned by

-                                          LegacyBiosGetLegacyRegion.

-  @param[in]  LegacyMemorySourceAddress   The source of the data to copy.

-

-  @retval EFI_SUCCESS           The Region assigned.

-  @retval EFI_ACCESS_DENIED     Destination was outside an 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

-  );

-

-///

-/// 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.

-///

-struct _EFI_LEGACY_BIOS_PROTOCOL {

-  ///

-  /// Performs traditional software INT. See the Int86() function description.

-  ///

-  EFI_LEGACY_BIOS_INT86                         Int86;

-

-  ///

-  /// Performs a far call into Compatibility16 or traditional OpROM code.

-  ///

-  EFI_LEGACY_BIOS_FARCALL86                     FarCall86;

-

-  ///

-  /// Checks if a traditional OpROM exists for this device.

-  ///

-  EFI_LEGACY_BIOS_CHECK_ROM                     CheckPciRom;

-

-  ///

-  /// Loads a traditional OpROM in traditional OpROM address space.

-  ///

-  EFI_LEGACY_BIOS_INSTALL_ROM                   InstallPciRom;

-

-  ///

-  /// Boots a traditional OS.

-  ///

-  EFI_LEGACY_BIOS_BOOT                          LegacyBoot;

-

-  ///

-  /// Updates BDA to reflect the current EFI keyboard LED status.

-  ///

-  EFI_LEGACY_BIOS_UPDATE_KEYBOARD_LED_STATUS    UpdateKeyboardLedStatus;

-

-  ///

-  /// Allows an external agent, such as BIOS Setup, to get the BBS data.

-  ///

-  EFI_LEGACY_BIOS_GET_BBS_INFO                  GetBbsInfo;

-

-  ///

-  /// Causes all legacy OpROMs to be shadowed.

-  ///

-  EFI_LEGACY_BIOS_SHADOW_ALL_LEGACY_OPROMS      ShadowAllLegacyOproms;

-

-  ///

-  /// Performs all actions prior to boot. Used when booting an EFI-aware OS

-  /// rather than a legacy OS.

-  ///

-  EFI_LEGACY_BIOS_PREPARE_TO_BOOT_EFI           PrepareToBootEfi;

-

-  ///

-  /// Allows EFI to reserve an area in the 0xE0000 or 0xF0000 block.

-  ///

-  EFI_LEGACY_BIOS_GET_LEGACY_REGION             GetLegacyRegion;

-

-  ///

-  /// Allows EFI to copy data to the area specified by GetLegacyRegion.

-  ///

-  EFI_LEGACY_BIOS_COPY_LEGACY_REGION            CopyLegacyRegion;

-

-  ///

-  /// Allows the user to boot off an unconventional device such as a PARTIES partition.

-  ///

-  EFI_LEGACY_BIOS_BOOT_UNCONVENTIONAL_DEVICE    BootUnconventionalDevice;

-};

-

-//

-// Legacy BIOS needs to access memory in page 0 (0-4095), which is disabled if

-// NULL pointer detection feature is enabled. Following macro can be used to

-// enable/disable page 0 before/after accessing it.

-//

-#define ACCESS_PAGE0_CODE(statements)                           \

-  do {                                                          \

-    EFI_STATUS                            Status_;              \

-    EFI_GCD_MEMORY_SPACE_DESCRIPTOR       Desc_;                \

-                                                                \

-    Desc_.Attributes = 0;                                       \

-    Status_ = gDS->GetMemorySpaceDescriptor (0, &Desc_);        \

-    ASSERT_EFI_ERROR (Status_);                                 \

-    if ((Desc_.Attributes & EFI_MEMORY_RP) != 0) {              \

-      Status_ = gDS->SetMemorySpaceAttributes (                 \

-                      0,                                        \

-                      EFI_PAGES_TO_SIZE(1),                     \

-                      Desc_.Attributes & ~(UINT64)EFI_MEMORY_RP \

-                      );                                        \

-      ASSERT_EFI_ERROR (Status_);                               \

-    }                                                           \

-                                                                \

-    {                                                           \

-      statements;                                               \

-    }                                                           \

-                                                                \

-    if ((Desc_.Attributes & EFI_MEMORY_RP) != 0) {              \

-      Status_ = gDS->SetMemorySpaceAttributes (                 \

-                      0,                                        \

-                      EFI_PAGES_TO_SIZE(1),                     \

-                      Desc_.Attributes                          \

-                      );                                        \

-      ASSERT_EFI_ERROR (Status_);                               \

-    }                                                           \

-  } while (FALSE)

-

-extern EFI_GUID  gEfiLegacyBiosProtocolGuid;

-

-#endif

diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec
index d257007c23..9c2e84ca60 100644
--- a/OvmfPkg/OvmfPkg.dec
+++ b/OvmfPkg/OvmfPkg.dec
@@ -183,7 +183,6 @@
   gXenIoProtocolGuid                    = {0x6efac84f, 0x0ab0, 0x4747, {0x81, 0xbe, 0x85, 0x55, 0x62, 0x59, 0x04, 0x49}}

   gIoMmuAbsentProtocolGuid              = {0xf8775d50, 0x8abd, 0x4adf, {0x92, 0xac, 0x85, 0x3e, 0x51, 0xf6, 0xc8, 0xdc}}

   gEfiLegacy8259ProtocolGuid            = {0x38321dba, 0x4fe0, 0x4e17, {0x8a, 0xec, 0x41, 0x30, 0x55, 0xea, 0xed, 0xc1}}

-  gEfiLegacyBiosProtocolGuid            = {0xdb9a1e3d, 0x45cb, 0x4abb, {0x85, 0x3b, 0xe5, 0x38, 0x7f, 0xdb, 0x2e, 0x2d}}

   gEfiLegacyInterruptProtocolGuid       = {0x31ce593d, 0x108a, 0x485d, {0xad, 0xb2, 0x78, 0xf2, 0x1f, 0x29, 0x66, 0xbe}}

   gOvmfLoadedX86LinuxKernelProtocolGuid = {0xa3edc05d, 0xb618, 0x4ff6, {0x95, 0x52, 0x76, 0xd7, 0x88, 0x63, 0x43, 0xc8}}

   gOvmfSevMemoryAcceptanceProtocolGuid  = {0xc5a010fe, 0x38a7, 0x4531, {0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49}}