diff options
Diffstat (limited to 'fs/fdos/dev.c')
| -rw-r--r-- | fs/fdos/dev.c | 130 |
1 files changed, 65 insertions, 65 deletions
diff --git a/fs/fdos/dev.c b/fs/fdos/dev.c index 809156a..5dea5cd 100644 --- a/fs/fdos/dev.c +++ b/fs/fdos/dev.c @@ -38,7 +38,7 @@ static int lastwhere; /*----------------------------------------------------------------------------- - * dev_open -- + * dev_open -- *----------------------------------------------------------------------------- */ int dev_open (void) @@ -57,17 +57,17 @@ int dev_read (void *buffer, int where, int len) /* Si on ne desire pas lire a la position courante, il faut un seek */ if (where != lastwhere) { - if (!fdc_fdos_seek (where)) { - PRINTF ("seek error in dev_read"); - lastwhere = -1; - return (-1); - } + if (!fdc_fdos_seek (where)) { + PRINTF ("seek error in dev_read"); + lastwhere = -1; + return (-1); + } } - + if (!fdc_fdos_read (buffer, len)) { - PRINTF ("read error\n"); - lastwhere = -1; - return (-1); + PRINTF ("read error\n"); + lastwhere = -1; + return (-1); } lastwhere = where + len; return (0); @@ -84,110 +84,110 @@ int check_dev (BootSector_t *boot, Fs_t *fs) /* Display Boot header */ PRINTF ("Jump to boot code 0x%02x 0x%02x 0x%02x\n", - boot -> jump [0], boot -> jump [1], boot -> jump[2]); + boot -> jump [0], boot -> jump [1], boot -> jump[2]); PRINTF ("OEM name & version '%*.*s'\n", - BANNER_LG, BANNER_LG, boot -> banner ); + BANNER_LG, BANNER_LG, boot -> banner ); PRINTF ("Bytes per sector hopefully 512 %d\n", - __le16_to_cpu (boot -> secsiz)); + __le16_to_cpu (boot -> secsiz)); PRINTF ("Cluster size in sectors %d\n", - boot -> clsiz); + boot -> clsiz); PRINTF ("Number of reserved (boot) sectors %d\n", - __le16_to_cpu (boot -> nrsvsect)); + __le16_to_cpu (boot -> nrsvsect)); PRINTF ("Number of FAT tables hopefully 2 %d\n", - boot -> nfat); + boot -> nfat); PRINTF ("Number of directory slots %d\n", - __le16_to_cpu (boot -> dirents)); + __le16_to_cpu (boot -> dirents)); PRINTF ("Total sectors on disk %d\n", - __le16_to_cpu (boot -> psect)); + __le16_to_cpu (boot -> psect)); PRINTF ("Media descriptor=first byte of FAT %d\n", - boot -> descr); + boot -> descr); PRINTF ("Sectors in FAT %d\n", - __le16_to_cpu (boot -> fatlen)); + __le16_to_cpu (boot -> fatlen)); PRINTF ("Sectors/track %d\n", - __le16_to_cpu (boot -> nsect)); + __le16_to_cpu (boot -> nsect)); PRINTF ("Heads %d\n", - __le16_to_cpu (boot -> nheads)); + __le16_to_cpu (boot -> nheads)); PRINTF ("number of hidden sectors %d\n", - __le32_to_cpu (boot -> nhs)); + __le32_to_cpu (boot -> nhs)); PRINTF ("big total sectors %d\n", - __le32_to_cpu (boot -> bigsect)); + __le32_to_cpu (boot -> bigsect)); PRINTF ("physical drive ? %d\n", - boot -> physdrive); + boot -> physdrive); PRINTF ("reserved %d\n", - boot -> reserved); + boot -> reserved); PRINTF ("dos > 4.0 diskette %d\n", - boot -> dos4); + boot -> dos4); PRINTF ("serial number %d\n", - __le32_to_cpu (boot -> serial)); + __le32_to_cpu (boot -> serial)); PRINTF ("disk label %*.*s\n", - LABEL_LG, LABEL_LG, boot -> label); + LABEL_LG, LABEL_LG, boot -> label); PRINTF ("FAT type %8.8s\n", - boot -> fat_type); + boot -> fat_type); PRINTF ("reserved by 2M %d\n", - boot -> res_2m); + boot -> res_2m); PRINTF ("2M checksum (not used) %d\n", - boot -> CheckSum); + boot -> CheckSum); PRINTF ("2MF format version %d\n", - boot -> fmt_2mf); + boot -> fmt_2mf); PRINTF ("1 if write track after format %d\n", - boot -> wt); + boot -> wt); PRINTF ("data transfer rate on track 0 %d\n", - boot -> rate_0); + boot -> rate_0); PRINTF ("data transfer rate on track<>0 %d\n", - boot -> rate_any); + boot -> rate_any); PRINTF ("offset to boot program %d\n", - __le16_to_cpu (boot -> BootP)); + __le16_to_cpu (boot -> BootP)); PRINTF ("T1: information for track 0 %d\n", - __le16_to_cpu (boot -> Infp0)); + __le16_to_cpu (boot -> Infp0)); PRINTF ("T2: information for track<>0 %d\n", - __le16_to_cpu (boot -> InfpX)); + __le16_to_cpu (boot -> InfpX)); PRINTF ("T3: track sectors size table %d\n", - __le16_to_cpu (boot -> InfTm)); + __le16_to_cpu (boot -> InfTm)); PRINTF ("Format date 0x%04x\n", - __le16_to_cpu (boot -> DateF)); + __le16_to_cpu (boot -> DateF)); PRINTF ("Format time 0x%04x\n", - __le16_to_cpu (boot -> TimeF)); - + __le16_to_cpu (boot -> TimeF)); + /* information is extracted from boot sector */ heads = __le16_to_cpu (boot -> nheads); sectors = __le16_to_cpu (boot -> nsect); fs -> tot_sectors = __le32_to_cpu (boot -> bigsect); if (__le16_to_cpu (boot -> psect) != 0) { - fs -> tot_sectors = __le16_to_cpu (boot -> psect); + fs -> tot_sectors = __le16_to_cpu (boot -> psect); } - + sect_per_track = heads * sectors; tracks = (fs -> tot_sectors + sect_per_track - 1) / sect_per_track; - + BootP = __le16_to_cpu (boot -> BootP); Infp0 = __le16_to_cpu (boot -> Infp0); InfpX = __le16_to_cpu (boot -> InfpX); InfTm = __le16_to_cpu (boot -> InfTm); - + if (boot -> dos4 == EXTENDED_BOOT && - strncmp( boot->banner,"2M", 2 ) == 0 && - BootP < SZ_STD_SECTOR && - Infp0 < SZ_STD_SECTOR && - InfpX < SZ_STD_SECTOR && - InfTm < SZ_STD_SECTOR && - BootP >= InfTm + 2 && - InfTm >= InfpX && - InfpX >= Infp0 && - Infp0 >= 76 ) { - - return (-1); + strncmp( boot->banner,"2M", 2 ) == 0 && + BootP < SZ_STD_SECTOR && + Infp0 < SZ_STD_SECTOR && + InfpX < SZ_STD_SECTOR && + InfTm < SZ_STD_SECTOR && + BootP >= InfTm + 2 && + InfTm >= InfpX && + InfpX >= Infp0 && + Infp0 >= 76 ) { + + return (-1); } if (heads != NB_HEADS || - tracks != NB_TRACKS || - sectors != NB_SECTORS || - __le16_to_cpu (boot -> secsiz) != SZ_STD_SECTOR || - fs -> tot_sectors == 0 || - (fs -> tot_sectors % sectors) != 0) { - return (-1); + tracks != NB_TRACKS || + sectors != NB_SECTORS || + __le16_to_cpu (boot -> secsiz) != SZ_STD_SECTOR || + fs -> tot_sectors == 0 || + (fs -> tot_sectors % sectors) != 0) { + return (-1); } - + return (0); } |