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audk/EdkCompatibilityPkg/Foundation/Framework/Protocol/LegacyBios/LegacyBios.h

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/*++
Copyright (c) 2004 - 2007, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
LegacyBios.h
Abstract:
The EFI Legacy BIOS Protocol is used to abstract legacy Option ROM usage
under EFI and Legacy OS boot.
Note: The names for EFI_IA32_REGISTER_SET elements were picked to follow
well known naming conventions.
Thunk - A thunk is a transition from one processor mode to another. A Thunk
is a transition from native EFI mode to 16-bit mode. A reverse thunk
would be a transition from 16-bit mode to native EFI mode.
Note: Note: Note: Note: Note: Note: Note:
You most likely should not use this protocol! Find the EFI way to solve the
problem to make your code portable
Note: Note: Note: Note: Note: Note: Note:
Revision History
The EFI Legacy BIOS Protocol is compliant with CSM spec 0.96.
--*/
#ifndef _EFI_LEGACY_BIOS_H
#define _EFI_LEGACY_BIOS_H
#define EFI_LEGACY_BIOS_PROTOCOL_GUID \
{ \
0xdb9a1e3d, 0x45cb, 0x4abb, {0x85, 0x3b, 0xe5, 0x38, 0x7f, 0xdb, 0x2e, 0x2d} \
}
EFI_FORWARD_DECLARATION (EFI_LEGACY_BIOS_PROTOCOL);
//
// Convert from 32-bit address (_Adr) to Segment:Offset 16-bit form
//
#define EFI_SEGMENT(_Adr) (UINT16) ((UINT16) (((UINTN) (_Adr)) >> 4) & 0xf000)
#define EFI_OFFSET(_Adr) (UINT16) (((UINT16) ((UINTN) (_Adr))) & 0xffff)
#define BYTE_GRANULARITY 0x01
#define WORD_GRANULARITY 0x02
#define DWORD_GRANULARITY 0x04
#define QWORD_GRANULARITY 0x08
#define PARAGRAPH_GRANULARITY 0x10
#define CARRY_FLAG 0x01
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;
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;
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;
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;
typedef struct {
UINT8 AL;
UINT8 AH;
UINT16 ReservedAX;
UINT8 BL;
UINT8 BH;
UINT16 ReservedBX;
UINT8 CL;
UINT8 CH;
UINT16 ReservedCX;
UINT8 DL;
UINT8 DH;
UINT16 ReservedDX;
} EFI_BYTE_REGS;
typedef union {
EFI_DWORD_REGS E;
EFI_WORD_REGS X;
EFI_BYTE_REGS H;
} EFI_IA32_REGISTER_SET;
#pragma pack(1)
//
// $EFI table created by Legacy16 code and consumed by EFI Legacy driver
//
typedef struct {
UINT32 Signature; // "$EFI"
UINT8 TableChecksum;
UINT8 TableLength;
UINT8 EfiMajorRevision;
UINT8 EfiMinorRevision;
UINT8 TableMajorRevision;
UINT8 TableMinorRevision;
UINT16 Reserved;
UINT16 Compatibility16CallSegment;
UINT16 Compatibility16CallOffset;
UINT16 PnPInstallationCheckSegment;
UINT16 PnPInstallationCheckOffset;
UINT32 EfiSystemTable; // IPF - CSM Integration
UINT32 OemIdStringPointer;
UINT32 AcpiRsdPtrPointer;
UINT16 OemRevision;
UINT32 E820Pointer;
UINT32 E820Length;
UINT32 IrqRoutingTablePointer;
UINT32 IrqRoutingTableLength;
UINT32 MpTablePtr;
UINT32 MpTableLength;
UINT16 OemIntSegment;
UINT16 OemIntOffset;
UINT16 Oem32Segment;
UINT16 Oem32Offset;
UINT16 Oem16Segment;
UINT16 Oem16Offset;
UINT16 TpmSegment;
UINT16 TpmOffset;
UINT32 IbvPointer;
UINT32 PciExpressBase;
UINT8 LastPciBus;
} EFI_COMPATIBILITY16_TABLE;
typedef enum {
Compatibility16InitializeYourself = 0x0000,
Compatibility16UpdateBbs = 0x0001,
Compatibility16PrepareToBoot = 0x0002,
Compatibility16Boot = 0x0003,
Compatibility16RetrieveLastBootDevice = 0x0004,
Compatibility16DispatchOprom = 0x0005,
Compatibility16GetTableAddress = 0x0006,
Compatibility16SetKeyboardLeds = 0x0007,
Compatibility16InstallPciHandler = 0x0008
} EFI_COMPATIBILITY_FUNCTIONS;
//
// define maximum number of HDD system supports
//
#define MAX_HDD_ENTRIES 0x30
typedef struct {
UINT16 Raw[256];
} ATAPI_IDENTIFY;
//
// HDD_INFO status
//
#define HDD_PRIMARY 0x01
#define HDD_SECONDARY 0x02
#define HDD_MASTER_ATAPI_CDROM 0x04
#define HDD_SLAVE_ATAPI_CDROM 0x08
#define HDD_MASTER_IDE 0x20
#define HDD_SLAVE_IDE 0x40
#define HDD_MASTER_ATAPI_ZIPDISK 0x10
#define HDD_SLAVE_ATAPI_ZIPDISK 0x80
typedef struct {
UINT16 Status;
UINT32 Bus;
UINT32 Device;
UINT32 Function;
UINT16 CommandBaseAddress;
UINT16 ControlBaseAddress;
UINT16 BusMasterAddress;
UINT8 HddIrq;
ATAPI_IDENTIFY IdentifyDrive[2];
} HDD_INFO;
//
// Parties data structures
//
typedef struct {
UINT8 DirectoryServiceValidity : 1;
UINT8 RabcaUsedFlag : 1;
UINT8 ExecuteHddDiagnosticsFlag : 1;
UINT8 Reserved : 5;
} UDC_ATTRIBUTES;
typedef struct {
UDC_ATTRIBUTES Attributes;
UINT8 DeviceNumber;
UINT8 BbsTableEntryNumberForParentDevice;
UINT8 BbsTableEntryNumberForBoot;
UINT8 BbsTableEntryNumberForHddDiag;
UINT8 BeerData[128];
UINT8 ServiceAreaData[64];
} UD_TABLE;
//
// define BBS Device Types
//
#define BBS_FLOPPY 0x01
#define BBS_HARDDISK 0x02
#define BBS_CDROM 0x03
#define BBS_PCMCIA 0x04
#define BBS_USB 0x05
#define BBS_EMBED_NETWORK 0x06
#define BBS_BEV_DEVICE 0x80
#define BBS_UNKNOWN 0xff
typedef struct {
UINT16 OldPosition : 4;
UINT16 Reserved1 : 4;
UINT16 Enabled : 1;
UINT16 Failed : 1;
UINT16 MediaPresent : 2;
UINT16 Reserved2 : 4;
} BBS_STATUS_FLAGS;
#define MAX_BBS_ENTRIES 0x100
//
// BBS_IGNORE_ENTRY is placed in the BootPriority field if the entry is to
// be skipped.
// BBS_UNPRIORITIZED_ENTRY is placed in the BootPriority field before
// priority has been assigned but indicates valid entry.
// BBS_LOWEST_PRIORITY is normally used for removable media with no media
// inserted. This allows the 16-bit CSM to allocate a drive letter to
// the device.
// BBS_DO_NOT_BOOT_FROM is used for devices that the 16-bit CSM is to assign
// a drive letter to but never boot from.
//
// AdditionalIrq??Handler usage is IBV specific. The fields have been added
// for:
// 1. Saving non-BBS card info about IRQs taken by card.
// 2. For BBS compliant cards that hook IRQs in order to have their SETUP
// executed.
//
#define BBS_DO_NOT_BOOT_FROM 0xFFFC
#define BBS_LOWEST_PRIORITY 0xFFFD
#define BBS_UNPRIORITIZED_ENTRY 0xFFFE
#define BBS_IGNORE_ENTRY 0xFFFF
typedef struct {
UINT16 BootPriority;
UINT32 Bus;
UINT32 Device;
UINT32 Function;
UINT8 Class;
UINT8 SubClass;
UINT16 MfgStringOffset;
UINT16 MfgStringSegment;
UINT16 DeviceType;
BBS_STATUS_FLAGS StatusFlags;
UINT16 BootHandlerOffset;
UINT16 BootHandlerSegment;
UINT16 DescStringOffset;
UINT16 DescStringSegment;
UINT32 InitPerReserved;
UINT32 AdditionalIrq13Handler;
UINT32 AdditionalIrq18Handler;
UINT32 AdditionalIrq19Handler;
UINT32 AdditionalIrq40Handler;
UINT8 AssignedDriveNumber;
UINT32 AdditionalIrq41Handler;
UINT32 AdditionalIrq46Handler;
UINT32 IBV1;
UINT32 IBV2;
} BBS_TABLE;
#pragma pack()
typedef
BOOLEAN
(EFIAPI *EFI_LEGACY_BIOS_INT86) (
IN EFI_LEGACY_BIOS_PROTOCOL * This,
IN UINT8 BiosInt,
IN OUT EFI_IA32_REGISTER_SET * Regs
)
/*++
Routine Description:
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.
Arguments:
This - Protocol instance pointer.
BiosInt - Processor interrupt vector to invoke
Reg - Register contexted passed into (and returned) from thunk to
16-bit mode
Returns:
FALSE - Thunk completed, and there were no BIOS errors in the target code.
See Regs for status.
TRUE - There was a BIOS erro in the target code.
--*/
;
typedef
BOOLEAN
(EFIAPI *EFI_LEGACY_BIOS_FARCALL86) (
IN EFI_LEGACY_BIOS_PROTOCOL * This,
IN UINT16 Segment,
IN UINT16 Offset,
IN EFI_IA32_REGISTER_SET * Regs,
IN VOID *Stack,
IN UINTN StackSize
)
/*++
Routine Description:
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
Arguments:
This - Protocol instance pointer.
Segment - Segemnt of 16-bit mode call
Offset - Offset of 16-bit mdoe call
Reg - Register contexted passed into (and returned) from thunk to
16-bit mode
Stack - Caller allocated stack used to pass arguments
StackSize - Size of Stack in bytes
Returns:
FALSE - Thunk completed, and there were no BIOS errors in the target code.
See Regs for status.
TRUE - There was a BIOS erro in the target code.
--*/
;
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
)
/*++
Routine Description:
Test to see if a legacy PCI ROM exists for this device. Optionally return
the Legacy ROM instance for this PCI device.
Arguments:
This - Protocol instance pointer.
PciHandle - The PCI PC-AT OPROM from this devices ROM BAR will be loaded
RomImage - Return the legacy PCI ROM for this device
RomSize - Size of ROM Image
Flags - Indicates if ROM found and if PC-AT.
Returns:
EFI_SUCCESS - Legacy Option ROM availible for this device
EFI_UNSUPPORTED - Legacy Option ROM not supported.
--*/
;
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
)
/*++
Routine Description:
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:
Arguments:
This - Protocol instance pointer.
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.
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.
Flags - Return Status if ROM was found and if was Legacy OPROM.
DiskStart - Disk number of first device hooked by the ROM. If DiskStart
is the same as DiskEnd no disked were hooked.
DiskEnd - Disk number of the last device hooked by the ROM.
RomShadowAddress - Shadow address of PC-AT ROM
RomShadowSize - Size of RomShadowAddress in bytes
Returns:
EFI_SUCCESS - Thunk completed, see Regs for status.
EFI_INVALID_PARAMETER - PciHandle not found
--*/
;
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
)
/*++
Routine Description:
Attempt to legacy boot the BootOption. If the EFI contexted has been
compromised this function will not return.
Arguments:
This - Protocol instance pointer.
BootOption - EFI Device Path from BootXXXX variable.
LoadOptionSize - Size of LoadOption in size.
LoadOption - LoadOption from BootXXXX variable
Returns:
EFI_SUCCESS - Removable media not present
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_UPDATE_KEYBOARD_LED_STATUS) (
IN EFI_LEGACY_BIOS_PROTOCOL * This,
IN UINT8 Leds
)
/*++
Routine Description:
Update BDA with current Scroll, Num & Cap lock LEDS
Arguments:
This - Protocol instance pointer.
Leds - Status of current Scroll, Num & Cap lock LEDS
Bit 0 is Scroll Lock 0 = Not locked
Bit 1 is Num Lock
Bit 2 is Caps Lock
Returns:
EFI_SUCCESS - Removable media not present
--*/
;
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
)
/*++
Routine Description:
Retrieve legacy BBS info and assign boot priority.
Arguments:
This - Protocol instance pointer.
HddCount - Number of HDD_INFO structures
HddInfo - Onboard IDE controller information
BbsCount - Number of BBS_TABLE structures
BbsTable - List BBS entries
Returns:
EFI_SUCCESS - Tables returned
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_PREPARE_TO_BOOT_EFI) (
IN EFI_LEGACY_BIOS_PROTOCOL * This,
OUT UINT16 *BbsCount,
OUT BBS_TABLE **BbsTable
)
/*++
Routine Description:
Assign drive number to legacy HDD drives prior to booting an EFI
aware OS so the OS can access drives without an EFI driver.
Arguments:
This - Protocol instance pointer.
BbsCount - Number of BBS_TABLE structures
BbsTable - List BBS entries
Returns:
EFI_SUCCESS - Drive numbers assigned
--*/
;
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
)
/*++
Routine Description:
To boot from an unconventional device like parties and/or execute
HDD diagnostics.
Arguments:
This - Protocol instance pointer.
Attributes - How to interpret the other input parameters
BbsEntry - The 0-based index into the BbsTable for the parent
device.
BeerData - Pointer to the 128 bytes of ram BEER data.
ServiceAreaData - Pointer to the 64 bytes of raw Service Area data. The
caller must provide a pointer to the specific Service
Area and not the start all Service Areas.
Returns:
EFI_INVALID_PARAMETER if error. Does NOT return if no error.
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_BIOS_SHADOW_ALL_LEGACY_OPROMS) (
IN EFI_LEGACY_BIOS_PROTOCOL * This
)
/*++
Routine Description:
Shadow all legacy16 OPROMs that haven't been shadowed.
Warning: Use this with caution. This routine disconnects all EFI
drivers. If used externally then caller must re-connect EFI
drivers.
Arguments:
Returns:
EFI_SUCCESS - OPROMs shadowed
--*/
;
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
)
/*++
Routine Description:
Get a region from the LegacyBios for S3 usage.
Arguments:
This - Protocol instance pointer.
LegacyMemorySize - Size of required region
Region - Region to use.
00 = Either 0xE0000 or 0xF0000 block
Bit0 = 1 0xF0000 block
Bit1 = 1 0xE0000 block
Alignment - Address alignment. Bit mapped. First non-zero
bit from right is alignment.
LegacyMemoryAddress - Region Assigned
Returns:
EFI_SUCCESS - Region assigned
Other - Region not assigned
--*/
;
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
)
/*++
Routine Description:
Get a region from the LegacyBios for Tiano usage. Can only be invoked once.
Arguments:
This - Protocol instance pointer.
LegacyMemorySize - Size of data to copy
LegacyMemoryAddress - Legacy Region destination address
Note: must be in region assigned by
LegacyBiosGetLegacyRegion
LegacyMemorySourceAddress - Source of data
Returns:
EFI_SUCCESS - Region assigned
EFI_ACCESS_DENIED - Destination outside assigned region
--*/
;
struct _EFI_LEGACY_BIOS_PROTOCOL {
EFI_LEGACY_BIOS_INT86 Int86;
EFI_LEGACY_BIOS_FARCALL86 FarCall86;
EFI_LEGACY_BIOS_CHECK_ROM CheckPciRom;
EFI_LEGACY_BIOS_INSTALL_ROM InstallPciRom;
EFI_LEGACY_BIOS_BOOT LegacyBoot;
EFI_LEGACY_BIOS_UPDATE_KEYBOARD_LED_STATUS UpdateKeyboardLedStatus;
EFI_LEGACY_BIOS_GET_BBS_INFO GetBbsInfo;
EFI_LEGACY_BIOS_SHADOW_ALL_LEGACY_OPROMS ShadowAllLegacyOproms;
EFI_LEGACY_BIOS_PREPARE_TO_BOOT_EFI PrepareToBootEfi;
EFI_LEGACY_BIOS_GET_LEGACY_REGION GetLegacyRegion;
EFI_LEGACY_BIOS_COPY_LEGACY_REGION CopyLegacyRegion;
EFI_LEGACY_BIOS_BOOT_UNCONVENTIONAL_DEVICE BootUnconventionalDevice;
};
extern EFI_GUID gEfiLegacyBiosProtocolGuid;
#endif
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