diff options
Diffstat (limited to 'sys/fs/msdosfs/bootsect.h')
| -rw-r--r-- | sys/fs/msdosfs/bootsect.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/sys/fs/msdosfs/bootsect.h b/sys/fs/msdosfs/bootsect.h new file mode 100644 index 0000000..666c0f8 --- /dev/null +++ b/sys/fs/msdosfs/bootsect.h @@ -0,0 +1,113 @@ +/* $FreeBSD$ */ +/* $NetBSD: bootsect.h,v 1.9 1997/11/17 15:36:17 ws Exp $ */ + +/* + * Written by Paul Popelka (paulp@uts.amdahl.com) + * + * You can do anything you want with this software, just don't say you wrote + * it, and don't remove this notice. + * + * This software is provided "as is". + * + * The author supplies this software to be publicly redistributed on the + * understanding that the author is not responsible for the correct + * functioning of this software in any circumstances and is not liable for + * any damages caused by this software. + * + * October 1992 + */ + +/* + * Format of a boot sector. This is the first sector on a DOS floppy disk + * or the fist sector of a partition on a hard disk. But, it is not the + * first sector of a partitioned hard disk. + */ +struct bootsector33 { + u_int8_t bsJump[3]; /* jump inst E9xxxx or EBxx90 */ + int8_t bsOemName[8]; /* OEM name and version */ + int8_t bsBPB[19]; /* BIOS parameter block */ + int8_t bsDriveNumber; /* drive number (0x80) */ + int8_t bsBootCode[479]; /* pad so struct is 512b */ + u_int8_t bsBootSectSig0; + u_int8_t bsBootSectSig1; +#define BOOTSIG0 0x55 +#define BOOTSIG1 0xaa +}; + +struct extboot { + int8_t exDriveNumber; /* drive number (0x80) */ + int8_t exReserved1; /* reserved */ + int8_t exBootSignature; /* ext. boot signature (0x29) */ +#define EXBOOTSIG 0x29 + int8_t exVolumeID[4]; /* volume ID number */ + int8_t exVolumeLabel[11]; /* volume label */ + int8_t exFileSysType[8]; /* fs type (FAT12 or FAT16) */ +}; + +struct bootsector50 { + u_int8_t bsJump[3]; /* jump inst E9xxxx or EBxx90 */ + int8_t bsOemName[8]; /* OEM name and version */ + int8_t bsBPB[25]; /* BIOS parameter block */ + int8_t bsExt[26]; /* Bootsector Extension */ + int8_t bsBootCode[448]; /* pad so structure is 512b */ + u_int8_t bsBootSectSig0; + u_int8_t bsBootSectSig1; +#define BOOTSIG0 0x55 +#define BOOTSIG1 0xaa +}; + +struct bootsector710 { + u_int8_t bsJump[3]; /* jump inst E9xxxx or EBxx90 */ + int8_t bsOEMName[8]; /* OEM name and version */ + int8_t bsPBP[53]; /* BIOS parameter block */ + int8_t bsExt[26]; /* Bootsector Extension */ + int8_t bsBootCode[418]; /* pad so structure is 512b */ + u_int8_t bsBootSectSig2; /* 2 & 3 are only defined for FAT32? */ + u_int8_t bsBootSectSig3; + u_int8_t bsBootSectSig0; + u_int8_t bsBootSectSig1; +#define BOOTSIG0 0x55 +#define BOOTSIG1 0xaa +#define BOOTSIG2 0 +#define BOOTSIG3 0 +}; +#ifdef atari +/* + * The boot sector on a gemdos fs is a little bit different from the msdos fs + * format. Currently there is no need to declare a seperate structure, the + * bootsector33 struct will do. + */ +#if 0 +struct bootsec_atari { + u_int8_t bsBranch[2]; /* branch inst if auto-boot */ + int8_t bsFiller[6]; /* anything or nothing */ + int8_t bsSerial[3]; /* serial no. for mediachange */ + int8_t bsBPB[19]; /* BIOS parameter block */ + int8_t bsBootCode[482]; /* pad so struct is 512b */ +}; +#endif +#endif /* atari */ + +union bootsector { + struct bootsector33 bs33; + struct bootsector50 bs50; + struct bootsector710 bs710; +}; + +#if 0 +/* + * Shorthand for fields in the bpb. + */ +#define bsBytesPerSec bsBPB.bpbBytesPerSec +#define bsSectPerClust bsBPB.bpbSectPerClust +#define bsResSectors bsBPB.bpbResSectors +#define bsFATS bsBPB.bpbFATS +#define bsRootDirEnts bsBPB.bpbRootDirEnts +#define bsSectors bsBPB.bpbSectors +#define bsMedia bsBPB.bpbMedia +#define bsFATsecs bsBPB.bpbFATsecs +#define bsSectPerTrack bsBPB.bpbSectPerTrack +#define bsHeads bsBPB.bpbHeads +#define bsHiddenSecs bsBPB.bpbHiddenSecs +#define bsHugeSectors bsBPB.bpbHugeSectors +#endif |
