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