109d71aacSSimon Glassconfig BLK 209d71aacSSimon Glass bool "Support block devices" 309d71aacSSimon Glass depends on DM 4896a74f6SSimon Glass default y if DM_MMC 509d71aacSSimon Glass help 609d71aacSSimon Glass Enable support for block devices, such as SCSI, MMC and USB 709d71aacSSimon Glass flash sticks. These provide a block-level interface which permits 809d71aacSSimon Glass reading, writing and (in some cases) erasing blocks. Block 909d71aacSSimon Glass devices often have a partition table which allows the device to 1009d71aacSSimon Glass be partitioned into several areas, called 'partitions' in U-Boot. 1109d71aacSSimon Glass A filesystem can be placed in each partition. 1209d71aacSSimon Glass 131811a928SAdam Fordconfig HAVE_BLOCK_DEVICE 141811a928SAdam Ford bool "Enable Legacy Block Device" 151811a928SAdam Ford help 161811a928SAdam Ford Some devices require block support whether or not DM is enabled 171811a928SAdam Ford 18c4d660d4SSimon Glassconfig SPL_BLK 19c4d660d4SSimon Glass bool "Support block devices in SPL" 20c4d660d4SSimon Glass depends on SPL_DM && BLK 21c4d660d4SSimon Glass default y 22c4d660d4SSimon Glass help 23c4d660d4SSimon Glass Enable support for block devices, such as SCSI, MMC and USB 24c4d660d4SSimon Glass flash sticks. These provide a block-level interface which permits 25c4d660d4SSimon Glass reading, writing and (in some cases) erasing blocks. Block 26c4d660d4SSimon Glass devices often have a partition table which allows the device to 27c4d660d4SSimon Glass be partitioned into several areas, called 'partitions' in U-Boot. 28c4d660d4SSimon Glass A filesystem can be placed in each partition. 29c4d660d4SSimon Glass 30e40cf34aSEric Nelsonconfig BLOCK_CACHE 31e40cf34aSEric Nelson bool "Use block device cache" 32*46960ad6STom Rini depends on BLK 33*46960ad6STom Rini default y 34e40cf34aSEric Nelson help 35e40cf34aSEric Nelson This option enables a disk-block cache for all block devices. 36e40cf34aSEric Nelson This is most useful when accessing filesystems under U-Boot since 37e40cf34aSEric Nelson it will prevent repeated reads from directory structures and other 38e40cf34aSEric Nelson filesystem data structures. 39e8a016b5SMichal Simek 40fc843a02SSimon Glassconfig IDE 41fc843a02SSimon Glass bool "Support IDE controllers" 421811a928SAdam Ford select HAVE_BLOCK_DEVICE 43fc843a02SSimon Glass help 44fc843a02SSimon Glass Enables support for IDE (Integrated Drive Electronics) hard drives. 45fc843a02SSimon Glass This allows access to raw blocks and filesystems on an IDE drive 46fc843a02SSimon Glass from U-Boot. See also CMD_IDE which provides an 'ide' command for 47fc843a02SSimon Glass performing various IDE operations. 48