/** @file
The EFI Legacy BIOS Platform Protocol is used to mate a Legacy16
implementation with this EFI code. The EFI driver that produces
the Legacy BIOS protocol is generic and consumes this protocol.
A driver that matches the Legacy16 produces this protocol
Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Revision Reference:
This protocol is defined in Framework for EFI Compatibility Support Module spec
Version 0.97.
**/
#ifndef _EFI_LEGACY_BIOS_PLATFORM_H_
#define _EFI_LEGACY_BIOS_PLATFORM_H_
///
/// Legacy BIOS Platform depends on HDD_INFO and EFI_COMPATIBILITY16_TABLE that
/// are defined with the Legacy BIOS Protocol
///
#include
#define EFI_LEGACY_BIOS_PLATFORM_PROTOCOL_GUID \
{ \
0x783658a3, 0x4172, 0x4421, {0xa2, 0x99, 0xe0, 0x9, 0x7, 0x9c, 0xc, 0xb4 } \
}
typedef struct _EFI_LEGACY_BIOS_PLATFORM_PROTOCOL EFI_LEGACY_BIOS_PLATFORM_PROTOCOL;
/**
This enum specifies the Mode param values for GetPlatformInfo()
**/
typedef enum {
///
/// This mode is invoked twice. The first invocation has LegacySegment and
/// LegacyOffset set to 0. The mode returns the MP table address in EFI memory, along with its size.
/// The second invocation has LegacySegment and LegacyOffset set to the location
/// in the 0xF0000 or 0xE0000 block to which the MP table is to be copied. The second
/// invocation allows any MP table address fixes to occur in the EFI memory copy of the
/// MP table. The caller, not EfiGetPlatformBinaryMpTable, copies the modified MP
/// table to the allocated region in 0xF0000 or 0xE0000 block after the second invocation.
///
/// The function parameters associated with this mode are:
///
/// Table Pointer to the MP table.
///
/// TableSize Size in bytes of the MP table.
///
/// Location Location to place table. 0x00. Either 0xE0000 or 0xF0000 64 KB blocks.
/// Bit 0 = 1 0xF0000 64 KB block.
/// Bit 1 = 1 0xE0000 64 KB block.
/// Multiple bits can be set.
///
/// Alignment Bit-mapped address alignment granularity.
/// The first nonzero bit from the right is the address granularity.
///
// LegacySegment Segment in which EfiCompatibility code will place the MP table.
///
/// LegacyOffset Offset in which EfiCompatibility code will place the MP table.
///
/// The return values associated with this mode are:
///
/// EFI_SUCCESS The MP table was returned.
///
/// EFI_UNSUPPORTED The MP table is not supported on this platform.
///
EfiGetPlatformBinaryMpTable = 0,
///
/// This mode returns a block of data. The content and usage is IBV or OEM defined.
/// OEMs or IBVs normally use this function for nonstandard Compatibility16 runtime soft
/// INTs. It is the responsibility of this routine to coalesce multiple OEM 16 bit functions, if
/// they exist, into one coherent package that is understandable by the Compatibility16 code.
/// This function is invoked twice. The first invocation has LegacySegment and
/// LegacyOffset set to 0. The function returns the table address in EFI memory, as well as its size.
/// The second invocation has LegacySegment and LegacyOffset set to the location
/// in the 0xF0000 or 0xE0000 block to which the data (table) is to be copied. The second
/// invocation allows any data (table) address fixes to occur in the EFI memory copy of
/// the table. The caller, not GetOemIntData(), copies the modified data (table) to the
/// allocated region in 0xF0000 or 0xE0000 block after the second invocation.
///
/// The function parameters associated with this mode are:
///
/// Table Pointer to OEM legacy 16 bit code or data.
///
/// TableSize Size of data.
///
/// Location Location to place table. 0x00. Either 0xE0000 or 0xF0000 64 KB blocks.
/// Bit 0 = 1 0xF0000 64 KB block.
/// Bit 1 = 1 0xE0000 64 KB block.
/// Multiple bits can be set.
///
/// Alignment Bit mapped address alignment granularity.
/// The first nonzero bit from the right is the address granularity.
///
/// LegacySegment Segment in which EfiCompatibility code will place the table or data.
///
/// LegacyOffset Offset in which EfiCompatibility code will place the table or data.
///
/// The return values associated with this mode are:
///
/// EFI_SUCCESS The data was returned successfully.
///
/// EFI_UNSUPPORTED Oem INT is not supported on this platform.
///
EfiGetPlatformBinaryOemIntData = 1,
///
/// This mode returns a block of data. The content and usage is IBV defined. OEMs or
/// IBVs normally use this mode for nonstandard Compatibility16 runtime 16 bit routines. It
/// is the responsibility of this routine to coalesce multiple OEM 16 bit functions, if they
/// exist, into one coherent package that is understandable by the Compatibility16 code.
///
/// Example usage: A legacy mobile BIOS that has a pre-existing runtime
/// interface to return the battery status to calling applications.
///
/// This mode is invoked twice. The first invocation has LegacySegment and
/// LegacyOffset set to 0. The mode returns the table address in EFI memory and its size.
/// The second invocation has LegacySegment and LegacyOffset set to the location
/// in the 0xF0000 or 0xE0000 block to which the table is to be copied. The second
/// invocation allows any table address fixes to occur in the EFI memory copy of the table.
/// The caller, not EfiGetPlatformBinaryOem16Data, copies the modified table to
/// the allocated region in 0xF0000 or 0xE0000 block after the second invocation.
///
/// The function parameters associated with this mode are:
///
/// Table Pointer to OEM legacy 16 bit code or data.
///
/// TableSize Size of data.
///
/// Location Location to place the table. 0x00. Either 0xE0000 or 0xF0000 64 KB blocks.
/// Bit 0 = 1 0xF0000 64 KB block.
/// Bit 1 = 1 0xE0000 64 KB block.
/// Multiple bits can be set.
///
/// Alignment Bit mapped address alignment granularity.
/// The first nonzero bit from the right is the address granularity.
///
/// LegacySegment Segment in which EfiCompatibility code will place the table or data.
///
/// LegacyOffset Offset in which EfiCompatibility code will place the table or data.
///
/// The return values associated with this mode are:
///
/// EFI_SUCCESS The data was returned successfully.
///
/// EFI_UNSUPPORTED Oem16 is not supported on this platform.
///
EfiGetPlatformBinaryOem16Data = 2,
///
/// This mode returns a block of data. The content and usage are IBV defined. OEMs or
/// IBVs normally use this mode for nonstandard Compatibility16 runtime 32 bit routines. It
/// is the responsibility of this routine to coalesce multiple OEM 32 bit functions, if they
/// exist, into one coherent package that is understandable by the Compatibility16 code.
///
/// Example usage: A legacy mobile BIOS that has a pre existing runtime
/// interface to return the battery status to calling applications.
///
/// This mode is invoked twice. The first invocation has LegacySegment and
/// LegacyOffset set to 0. The mode returns the table address in EFI memory and its size.
///
/// The second invocation has LegacySegment and LegacyOffset set to the location
/// in the 0xF0000 or 0xE0000 block to which the table is to be copied. The second
/// invocation allows any table address fix ups to occur in the EFI memory copy of the table.
/// The caller, not EfiGetPlatformBinaryOem32Data, copies the modified table to
/// the allocated region in 0xF0000 or 0xE0000 block after the second invocation..
///
/// Note: There are two generic mechanisms by which this mode can be used.
/// Mechanism 1: This mode returns the data and the Legacy BIOS Protocol copies
/// the data into the F0000 or E0000 block in the Compatibility16 code. The
/// EFI_COMPATIBILITY16_TABLE entries Oem32Segment and Oem32Offset can
/// be viewed as two UINT16 entries.
/// Mechanism 2: This mode directly fills in the EFI_COMPATIBILITY16_TABLE with
/// a pointer to the INT15 E820 region containing the 32 bit code. It returns
/// EFI_UNSUPPORTED. The EFI_COMPATIBILITY16_TABLE entries,
/// Oem32Segment and Oem32Offset, can be viewed as two UINT16 entries or
/// as a single UINT32 entry as determined by the IBV.
///
/// The function parameters associated with this mode are:
///
/// TableSize Size of data.
///
/// Location Location to place the table. 0x00 or 0xE0000 or 0xF0000 64 KB blocks.
/// Bit 0 = 1 0xF0000 64 KB block.
/// Bit 1 = 1 0xE0000 64 KB block.
/// Multiple bits can be set.
///
/// Alignment Bit mapped address alignment granularity.
/// The first nonzero bit from the right is the address granularity.
///
/// LegacySegment Segment in which EfiCompatibility code will place the table or data.
///
/// LegacyOffset Offset in which EfiCompatibility code will place the table or data.
///
/// The return values associated with this mode are:
/// EFI_SUCCESS The data was returned successfully.
/// EFI_UNSUPPORTED Oem32 is not supported on this platform.
///
EfiGetPlatformBinaryOem32Data = 3,
///
/// This mode returns a TPM binary image for the onboard TPM device.
///
/// The function parameters associated with this mode are:
///
/// Table TPM binary image for the onboard TPM device.
///
/// TableSize Size of BinaryImage in bytes.
///
/// Location Location to place the table. 0x00. Either 0xE0000 or 0xF0000 64 KB blocks.
/// Bit 0 = 1 0xF0000 64 KB block.
/// Bit 1 = 1 0xE0000 64 KB block.
/// Multiple bits can be set.
///
/// Alignment Bit mapped address alignment granularity.
/// The first nonzero bit from the right is the address granularity.
///
/// LegacySegment Segment in which EfiCompatibility code will place the table or data.
///
/// LegacyOffset Offset in which EfiCompatibility code will place the table or data.
///
/// The return values associated with this mode are:
///
/// EFI_SUCCESS BinaryImage is valid.
///
/// EFI_UNSUPPORTED Mode is not supported on this platform.
///
/// EFI_NOT_FOUND No BinaryImage was found.
///
EfiGetPlatformBinaryTpmBinary = 4,
///
/// The mode finds the Compatibility16 Rom Image.
///
/// The function parameters associated with this mode are:
///
/// System ROM image for the platform.
///
/// TableSize Size of Table in bytes.
///
/// Location Ignored.
///
/// Alignment Ignored.
///
/// LegacySegment Ignored.
///
/// LegacyOffset Ignored.
///
/// The return values associated with this mode are:
///
/// EFI_SUCCESS ROM image found.
///
/// EFI_NOT_FOUND ROM not found.
///
EfiGetPlatformBinarySystemRom = 5,
///
/// This mode returns the Base address of PciExpress memory mapped configuration
/// address space.
///
/// The function parameters associated with this mode are:
///
/// Table System ROM image for the platform.
///
/// TableSize Size of Table in bytes.
///
/// Location Ignored.
///
/// Alignment Ignored.
///
/// LegacySegment Ignored.
///
/// LegacyOffset Ignored.
///
/// The return values associated with this mode are:
///
/// EFI_SUCCESS Address is valid.
///
/// EFI_UNSUPPORTED System does not PciExpress.
///
EfiGetPlatformPciExpressBase = 6,
///
EfiGetPlatformPmmSize = 7,
///
EfiGetPlatformEndOpromShadowAddr = 8,
///
} EFI_GET_PLATFORM_INFO_MODE;
/**
This enum specifies the Mode param values for GetPlatformHandle().
**/
typedef enum {
///
/// This mode returns the Compatibility16 policy for the device that should be the VGA
/// controller used during a Compatibility16 boot.
///
/// The function parameters associated with this mode are:
///
/// Type 0x00.
///
/// HandleBuffer Buffer of all VGA handles found.
///
/// HandleCount Number of VGA handles found.
///
/// AdditionalData NULL.
///
EfiGetPlatformVgaHandle = 0,
///
/// This mode returns the Compatibility16 policy for the device that should be the IDE
/// controller used during a Compatibility16 boot.
///
/// The function parameters associated with this mode are:
///
/// Type 0x00.
///
/// HandleBuffer Buffer of all IDE handles found.
///
/// HandleCount Number of IDE handles found.
///
/// AdditionalData Pointer to HddInfo.
/// Information about all onboard IDE controllers.
///
EfiGetPlatformIdeHandle = 1,
///
/// This mode returns the Compatibility16 policy for the device that should be the ISA bus
/// controller used during a Compatibility16 boot.
///
/// The function parameters associated with this mode are:
///
/// Type 0x00.
///
/// HandleBuffer Buffer of all ISA bus handles found.
///
/// HandleCount Number of ISA bus handles found.
///
/// AdditionalData NULL.
///
EfiGetPlatformIsaBusHandle = 2,
///
/// This mode returns the Compatibility16 policy for the device that should be the USB
/// device used during a Compatibility16 boot.
///
/// The function parameters associated with this mode are:
///
/// Type 0x00.
///
/// HandleBuffer Buffer of all USB handles found.
///
/// HandleCount Number of USB bus handles found.
///
/// AdditionalData NULL.
///
EfiGetPlatformUsbHandle = 3
} EFI_GET_PLATFORM_HANDLE_MODE;
/**
This enum specifies the Mode param values for PlatformHooks().
Note: Any OEM defined hooks start with 0x8000.
**/
typedef enum {
///
/// This mode allows any preprocessing before scanning OpROMs.
///
/// The function parameters associated with this mode are:
///
/// Type 0.
///
/// DeviceHandle Handle of device OpROM is associated with.
///
/// ShadowAddress Address where OpROM is shadowed.
///
/// Compatibility16Table NULL.
///
/// AdditionalData NULL.
///
EfiPlatformHookPrepareToScanRom = 0,
///
/// This mode shadows legacy OpROMS that may not have a physical device associated with
/// them. It returns EFI_SUCCESS if the ROM was shadowed.
///
/// The function parameters associated with this mode are:
///
/// Type 0.
///
/// DeviceHandle 0.
///
/// ShadowAddress First free OpROM area, after other OpROMs have been dispatched..
///
/// Compatibility16Table Pointer to the Compatibility16 Table.
///
/// AdditionalData NULL.
///
EfiPlatformHookShadowServiceRoms = 1,
///
/// This mode allows platform to perform any required operation after an OpROM has
/// completed its initialization.
///
/// The function parameters associated with this mode are:
///
/// Type 0.
///
/// DeviceHandle Handle of device OpROM is associated with.
///
/// ShadowAddress Address where OpROM is shadowed.
///
/// Compatibility16Table NULL.
///
/// AdditionalData NULL.
///
EfiPlatformHookAfterRomInit = 2
} EFI_GET_PLATFORM_HOOK_MODE;
///
/// This IRQ has not been assigned to PCI.
///
#define PCI_UNUSED 0x00
///
/// This IRQ has been assigned to PCI.
///
#define PCI_USED 0xFF
///
/// This IRQ has been used by an SIO legacy device and cannot be used by PCI.
///
#define LEGACY_USED 0xFE
#pragma pack(1)
typedef struct {
///
/// IRQ for this entry.
///
UINT8 Irq;
///
/// Status of this IRQ.
///
/// PCI_UNUSED 0x00. This IRQ has not been assigned to PCI.
///
/// PCI_USED 0xFF. This IRQ has been assigned to PCI.
///
/// LEGACY_USED 0xFE. This IRQ has been used by an SIO legacy
/// device and cannot be used by PCI.
///
UINT8 Used;
} EFI_LEGACY_IRQ_PRIORITY_TABLE_ENTRY;
//
// Define PIR table structures
//
#define EFI_LEGACY_PIRQ_TABLE_SIGNATURE SIGNATURE_32 ('$', 'P', 'I', 'R')
typedef struct {
///
/// $PIR.
///
UINT32 Signature;
///
/// 0x00.
///
UINT8 MinorVersion;
///
/// 0x01 for table version 1.0.
///
UINT8 MajorVersion;
///
/// 0x20 + RoutingTableEntries * 0x10.
///
UINT16 TableSize;
///
/// PCI interrupt router bus.
///
UINT8 Bus;
///
/// PCI interrupt router device/function.
///
UINT8 DevFun;
///
/// If nonzero, bit map of IRQs reserved for PCI.
///
UINT16 PciOnlyIrq;
///
/// Vendor ID of a compatible PCI interrupt router.
///
UINT16 CompatibleVid;
///
/// Device ID of a compatible PCI interrupt router.
///
UINT16 CompatibleDid;
///
/// If nonzero, a value passed directly to the IRQ miniport's Initialize function.
///
UINT32 Miniport;
///
/// Reserved for future usage.
///
UINT8 Reserved[11];
///
/// This byte plus the sum of all other bytes in the LocalPirqTable equal 0x00.
///
UINT8 Checksum;
} EFI_LEGACY_PIRQ_TABLE_HEADER;
typedef struct {
///
/// If nonzero, a value assigned by the IBV.
///
UINT8 Pirq;
///
/// If nonzero, the IRQs that can be assigned to this device.
///
UINT16 IrqMask;
} EFI_LEGACY_PIRQ_ENTRY;
typedef struct {
///
/// PCI bus of the entry.
///
UINT8 Bus;
///
/// PCI device of this entry.
///
UINT8 Device;
///
/// An IBV value and IRQ mask for PIRQ pins A through D.
///
EFI_LEGACY_PIRQ_ENTRY PirqEntry[4];
///
/// If nonzero, the slot number assigned by the board manufacturer.
///
UINT8 Slot;
///
/// Reserved for future use.
///
UINT8 Reserved;
} EFI_LEGACY_IRQ_ROUTING_ENTRY;
#pragma pack()
/**
Finds the binary data or other platform information.
@param This The protocol instance pointer.
@param Mode Specifies what data to return. See See EFI_GET_PLATFORM_INFO_MODE enum.
@param Table Mode specific. See EFI_GET_PLATFORM_INFO_MODE enum.
@param TableSize Mode specific. See EFI_GET_PLATFORM_INFO_MODE enum.
@param Location Mode specific. See EFI_GET_PLATFORM_INFO_MODE enum.
@param Alignment Mode specific. See EFI_GET_PLATFORM_INFO_MODE enum.
@param LegacySegment Mode specific. See EFI_GET_PLATFORM_INFO_MODE enum.
@param LegacyOffset Mode specific. See EFI_GET_PLATFORM_INFO_MODE enum.
@retval EFI_SUCCESS Data returned successfully.
@retval EFI_UNSUPPORTED Mode is not supported on the platform.
@retval EFI_NOT_FOUND Binary image or table not found.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_PLATFORM_GET_PLATFORM_INFO)(
IN EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *This,
IN EFI_GET_PLATFORM_INFO_MODE Mode,
OUT VOID **Table,
OUT UINTN *TableSize,
OUT UINTN *Location,
OUT UINTN *Alignment,
IN UINT16 LegacySegment,
IN UINT16 LegacyOffset
);
/**
Returns a buffer of handles for the requested subfunction.
@param This The protocol instance pointer.
@param Mode Specifies what handle to return. See EFI_GET_PLATFORM_HANDLE_MODE enum.
@param Type Mode specific. See EFI_GET_PLATFORM_HANDLE_MODE enum.
@param HandleBuffer Mode specific. See EFI_GET_PLATFORM_HANDLE_MODE enum.
@param HandleCount Mode specific. See EFI_GET_PLATFORM_HANDLE_MODE enum.
@param AdditionalData Mode specific. See EFI_GET_PLATFORM_HANDLE_MODE enum.
@retval EFI_SUCCESS Handle is valid.
@retval EFI_UNSUPPORTED Mode is not supported on the platform.
@retval EFI_NOT_FOUND Handle is not known.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_PLATFORM_GET_PLATFORM_HANDLE)(
IN EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *This,
IN EFI_GET_PLATFORM_HANDLE_MODE Mode,
IN UINT16 Type,
OUT EFI_HANDLE **HandleBuffer,
OUT UINTN *HandleCount,
IN VOID **AdditionalData OPTIONAL
);
/**
Load and initialize the Legacy BIOS SMM handler.
@param This The protocol instance pointer.
@param EfiToLegacy16BootTable A pointer to Legacy16 boot table.
@retval EFI_SUCCESS SMM code loaded.
@retval EFI_DEVICE_ERROR SMM code failed to load
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_PLATFORM_SMM_INIT)(
IN EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *This,
IN VOID *EfiToLegacy16BootTable
);
/**
Allows platform to perform any required action after a LegacyBios operation.
Invokes the specific sub function specified by Mode.
@param This The protocol instance pointer.
@param Mode Specifies what handle to return. See EFI_GET_PLATFORM_HOOK_MODE enum.
@param Type Mode specific. See EFI_GET_PLATFORM_HOOK_MODE enum.
@param DeviceHandle Mode specific. See EFI_GET_PLATFORM_HOOK_MODE enum.
@param ShadowAddress Mode specific. See EFI_GET_PLATFORM_HOOK_MODE enum.
@param Compatibility16Table Mode specific. See EFI_GET_PLATFORM_HOOK_MODE enum.
@param AdditionalData Mode specific. See EFI_GET_PLATFORM_HOOK_MODE enum.
@retval EFI_SUCCESS The operation performed successfully. Mode specific.
@retval EFI_UNSUPPORTED Mode is not supported on the platform.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_PLATFORM_HOOKS)(
IN EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *This,
IN EFI_GET_PLATFORM_HOOK_MODE Mode,
IN UINT16 Type,
IN EFI_HANDLE DeviceHandle OPTIONAL,
IN OUT UINTN *ShadowAddress OPTIONAL,
IN EFI_COMPATIBILITY16_TABLE *Compatibility16Table OPTIONAL,
OUT VOID **AdditionalData OPTIONAL
);
/**
Returns information associated with PCI IRQ routing.
This function returns the following information associated with PCI IRQ routing:
* An IRQ routing table and number of entries in the table.
* The $PIR table and its size.
* A list of PCI IRQs and the priority order to assign them.
@param This The protocol instance pointer.
@param RoutingTable The pointer to PCI IRQ Routing table.
This location is the $PIR table minus the header.
@param RoutingTableEntries The number of entries in table.
@param LocalPirqTable $PIR table.
@param PirqTableSize $PIR table size.
@param LocalIrqPriorityTable A list of interrupts in priority order to assign.
@param IrqPriorityTableEntries The number of entries in the priority table.
@retval EFI_SUCCESS Data was successfully returned.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_PLATFORM_GET_ROUTING_TABLE)(
IN EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *This,
OUT VOID **RoutingTable,
OUT UINTN *RoutingTableEntries,
OUT VOID **LocalPirqTable OPTIONAL,
OUT UINTN *PirqTableSize OPTIONAL,
OUT VOID **LocalIrqPriorityTable OPTIONAL,
OUT UINTN *IrqPriorityTableEntries OPTIONAL
);
/**
Translates the given PIRQ accounting for bridge.
This function translates the given PIRQ back through all buses, if required,
and returns the true PIRQ and associated IRQ.
@param This The protocol instance pointer.
@param PciBus The PCI bus number for this device.
@param PciDevice The PCI device number for this device.
@param PciFunction The PCI function number for this device.
@param Pirq Input is PIRQ reported by device, and output is true PIRQ.
@param PciIrq The IRQ already assigned to the PIRQ, or the IRQ to be
assigned to the PIRQ.
@retval EFI_SUCCESS The PIRQ was translated.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_PLATFORM_TRANSLATE_PIRQ)(
IN EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *This,
IN UINTN PciBus,
IN UINTN PciDevice,
IN UINTN PciFunction,
IN OUT UINT8 *Pirq,
OUT UINT8 *PciIrq
);
/**
Attempt to legacy boot the BootOption. If the EFI contexted has been
compromised this function will not return.
@param This The protocol instance pointer.
@param BbsDevicePath The EFI Device Path from BootXXXX variable.
@param BbsTable The Internal BBS table.
@param LoadOptionSize The size of LoadOption in size.
@param LoadOption The LoadOption from BootXXXX variable
@param EfiToLegacy16BootTable A pointer to BootTable structure
@retval EFI_SUCCESS Ready to boot.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_PLATFORM_PREPARE_TO_BOOT)(
IN EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *This,
IN BBS_BBS_DEVICE_PATH *BbsDevicePath,
IN VOID *BbsTable,
IN UINT32 LoadOptionsSize,
IN VOID *LoadOptions,
IN VOID *EfiToLegacy16BootTable
);
/**
This protocol abstracts the platform portion of the traditional BIOS.
**/
struct _EFI_LEGACY_BIOS_PLATFORM_PROTOCOL {
///
/// Gets binary data or other platform information.
///
EFI_LEGACY_BIOS_PLATFORM_GET_PLATFORM_INFO GetPlatformInfo;
///
/// Returns a buffer of all handles matching the requested subfunction.
///
EFI_LEGACY_BIOS_PLATFORM_GET_PLATFORM_HANDLE GetPlatformHandle;
///
/// Loads and initializes the traditional BIOS SMM handler.
EFI_LEGACY_BIOS_PLATFORM_SMM_INIT SmmInit;
///
/// Allows platform to perform any required actions after a LegacyBios operation.
///
EFI_LEGACY_BIOS_PLATFORM_HOOKS PlatformHooks;
///
/// Gets $PIR table.
EFI_LEGACY_BIOS_PLATFORM_GET_ROUTING_TABLE GetRoutingTable;
///
/// Translates the given PIRQ to the final value after traversing any PCI bridges.
///
EFI_LEGACY_BIOS_PLATFORM_TRANSLATE_PIRQ TranslatePirq;
///
/// Final platform function before the system attempts to boot to a traditional OS.
///
EFI_LEGACY_BIOS_PLATFORM_PREPARE_TO_BOOT PrepareToBoot;
};
extern EFI_GUID gEfiLegacyBiosPlatformProtocolGuid;
#endif