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audk/IntelFrameworkPkg/Include/Protocol/LegacyBios.h

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/** @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
COMPATIBILIY16 structures and defintions.
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 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that 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.
@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 Compatability16
/// 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 Compatability16 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 availible 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;
};
extern EFI_GUID gEfiLegacyBiosProtocolGuid;
#endif
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