Curle
d588e232c4
This branch has been dedicated to purely the UEFI bootloader. As such, all other code has been removed. This code can be compiled with Visual Studio, gcc or llvm.
120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
/*++
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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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