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/*++
Copyright (c) 1999 Intel Corporation
Module Name:
legacyboot
Abstract:
EFI support for legacy boot
Revision History
--*/
#ifndef _LEGACY_BOOT_INCLUDE_
#define _LEGACY_BOOT_INCLUDE_
#define LEGACY_BOOT_PROTOCOL \
{ 0x376e5eb2, 0x30e4, 0x11d3, { 0xba, 0xe5, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } }
#pragma pack(1)
//
// BBS 1.01 (See Appendix A) IPL and BCV Table Entry Data structure.
// Seg:Off pointers have been converted to EFI pointers in this data structure
// This is the structure that also maps to the EFI device path for the boot selection
//
typedef struct {
UINT16 DeviceType;
UINT16 StatusFlag;
UINT32 Reserved;
VOID *BootHandler; // Not an EFI entry point
CHAR8 *DescString;
} BBS_TABLE_ENTRY;
#pragma pack()
typedef
EFI_STATUS
(EFIAPI *LEGACY_BOOT_CALL) (
IN EFI_DEVICE_PATH *DevicePath
);
//
// BBS support functions
// PnP Call numbers and BiosSelector hidden in implementation
//
typedef enum {
IplRelative,
BcvRelative
} BBS_TYPE;
INTERFACE_DECL(_LEGACY_BOOT_INTERFACE);
//
// == PnP Function 0x60 then BbsVersion == 0x0101 if this call fails then BbsVersion == 0x0000
//
//
// == PnP Function 0x61
//
typedef
EFI_STATUS
(EFIAPI *GET_DEVICE_COUNT) (
IN struct _LEGACY_BOOT_INTERFACE *This,
IN BBS_TYPE *TableType,
OUT UINTN *DeviceCount,
OUT UINTN *MaxCount
);
//
// == PnP Function 0x62
//
typedef
EFI_STATUS
(EFIAPI *GET_PRIORITY_AND_TABLE) (
IN struct _LEGACY_BOOT_INTERFACE *This,
IN BBS_TYPE *TableType,
IN OUT UINTN *PrioritySize, // MaxCount * sizeof(UINT8)
OUT UINTN *Priority,
IN OUT UINTN *TableSize, // MaxCount * sizeof(BBS_TABLE_ENTRY)
OUT BBS_TABLE_ENTRY *TableEntrySize
);
//
// == PnP Function 0x63
//
typedef
EFI_STATUS
(EFIAPI *SET_PRIORITY) (
IN struct _LEGACY_BOOT_INTERFACE *This,
IN BBS_TYPE *TableType,
IN OUT UINTN *PrioritySize,
OUT UINTN *Priority
);
typedef struct _LEGACY_BOOT_INTERFACE {
LEGACY_BOOT_CALL BootIt;
//
// New functions to allow BBS booting to be configured from EFI
//
UINTN BbsVersion; // Currently 0x0101
GET_DEVICE_COUNT GetDeviceCount;
GET_PRIORITY_AND_TABLE GetPriorityAndTable;
SET_PRIORITY SetPriority;
} LEGACY_BOOT_INTERFACE;
EFI_STATUS
PlInitializeLegacyBoot (
VOID
);
#endif
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