mirror of https://gitlab.com/nakst/essence
117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
#ifndef _EFI_FS_H
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#define _EFI_FS_H
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/*++
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Copyright (c) 1998 Intel Corporation
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Module Name:
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efifs.h
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Abstract:
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EFI File System structures
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Revision History
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--*/
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//
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// EFI Partition header (normaly starts in LBA 1)
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//
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#define EFI_PARTITION_SIGNATURE 0x5053595320494249
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#define EFI_PARTITION_REVISION 0x00010001
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#define MIN_EFI_PARTITION_BLOCK_SIZE 512
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#define EFI_PARTITION_LBA 1
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typedef struct _EFI_PARTITION_HEADER {
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EFI_TABLE_HEADER Hdr;
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UINT32 DirectoryAllocationNumber;
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UINT32 BlockSize;
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EFI_LBA FirstUsableLba;
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EFI_LBA LastUsableLba;
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EFI_LBA UnusableSpace;
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EFI_LBA FreeSpace;
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EFI_LBA RootFile;
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EFI_LBA SecutiryFile;
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} EFI_PARTITION_HEADER;
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//
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// File header
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//
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#define EFI_FILE_HEADER_SIGNATURE 0x454c494620494249
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#define EFI_FILE_HEADER_REVISION 0x00010000
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#define EFI_FILE_STRING_SIZE 260
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typedef struct _EFI_FILE_HEADER {
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EFI_TABLE_HEADER Hdr;
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UINT32 Class;
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UINT32 LBALOffset;
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EFI_LBA Parent;
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UINT64 FileSize;
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UINT64 FileAttributes;
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EFI_TIME FileCreateTime;
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EFI_TIME FileModificationTime;
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EFI_GUID VendorGuid;
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CHAR16 FileString[EFI_FILE_STRING_SIZE];
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} EFI_FILE_HEADER;
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//
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// Return the file's first LBAL which is in the same
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// logical block as the file header
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//
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#define EFI_FILE_LBAL(a) ((EFI_LBAL *) (((CHAR8 *) (a)) + (a)->LBALOffset))
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#define EFI_FILE_CLASS_FREE_SPACE 1
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#define EFI_FILE_CLASS_EMPTY 2
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#define EFI_FILE_CLASS_NORMAL 3
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//
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// Logical Block Address List - the fundemental block
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// description structure
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//
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#define EFI_LBAL_SIGNATURE 0x4c41424c20494249
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#define EFI_LBAL_REVISION 0x00010000
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typedef struct _EFI_LBAL {
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EFI_TABLE_HEADER Hdr;
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UINT32 Class;
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EFI_LBA Parent;
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EFI_LBA Next;
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UINT32 ArraySize;
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UINT32 ArrayCount;
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} EFI_LBAL;
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// Array size
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#define EFI_LBAL_ARRAY_SIZE(lbal,offs,blks) \
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(((blks) - (offs) - (lbal)->Hdr.HeaderSize) / sizeof(EFI_RL))
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//
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// Logical Block run-length
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//
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typedef struct {
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EFI_LBA Start;
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UINT64 Length;
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} EFI_RL;
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//
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// Return the run-length structure from an LBAL header
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//
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#define EFI_LBAL_RL(a) ((EFI_RL*) (((CHAR8 *) (a)) + (a)->Hdr.HeaderSize))
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#endif
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