diff options
Diffstat (limited to 'cpukit/libfs/src/dosfs/fat.h')
| -rw-r--r-- | cpukit/libfs/src/dosfs/fat.h | 39 |
1 files changed, 26 insertions, 13 deletions
diff --git a/cpukit/libfs/src/dosfs/fat.h b/cpukit/libfs/src/dosfs/fat.h index dab2471900..48b149199d 100644 --- a/cpukit/libfs/src/dosfs/fat.h +++ b/cpukit/libfs/src/dosfs/fat.h @@ -298,6 +298,9 @@ typedef struct fat_vol_s uint8_t spc_log2; /* log2 of spc */ uint16_t bpc; /* bytes per cluster */ uint8_t bpc_log2; /* log2 of bytes per cluster */ + uint8_t sectors_per_block; /* sectors per bdbuf block */ + uint16_t bytes_per_block; /* number of bytes for the bduf block device handling */ + uint8_t bytes_per_block_log2; /* log2 of bytes_per_block */ uint8_t fats; /* number of FATs */ uint8_t type; /* FAT type */ uint32_t mask; @@ -436,6 +439,25 @@ fat_cluster_num_to_sector512_num( fs_info->vol.sec_mul); } +static inline uint32_t + fat_sector_num_to_block_num (const fat_fs_info_t *fs_info, + const uint32_t sector_number) +{ + return sector_number >> (fs_info->vol.bytes_per_block_log2 - fs_info->vol.sec_log2); +} + +static inline uint32_t + fat_sector_offset_to_block_offset (const fat_fs_info_t *fs_info, + const uint32_t sector, + const uint32_t sector_offset) +{ + return sector_offset + + ((sector - + fat_block_num_to_sector_num (fs_info, + fat_sector_num_to_block_num (fs_info, sector))) + << fs_info->vol.sec_log2); +} + static inline void fat_buf_mark_modified(fat_fs_info_t *fs_info) { @@ -443,8 +465,10 @@ fat_buf_mark_modified(fat_fs_info_t *fs_info) } int -fat_buf_access(fat_fs_info_t *fs_info, uint32_t blk, int op_type, - rtems_bdbuf_buffer **buf); +fat_buf_access(fat_fs_info_t *fs_info, + uint32_t sec_num, + int op_type, + uint8_t **sec_buf); int fat_buf_release(fat_fs_info_t *fs_info); @@ -469,18 +493,7 @@ _fat_block_zero(fat_fs_info_t *fs_info, uint32_t offset, uint32_t count); -int -_fat_block_release(fat_fs_info_t *fs_info); - -ssize_t -fat_cluster_read(fat_fs_info_t *fs_info, - uint32_t cln, - void *buff); -ssize_t -fat_cluster_write(fat_fs_info_t *fs_info, - uint32_t cln, - const void *buff); int fat_init_volume_info(fat_fs_info_t *fs_info, const char *device); |