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 13*c4d660d4SSimon Glassconfig SPL_BLK 14*c4d660d4SSimon Glass bool "Support block devices in SPL" 15*c4d660d4SSimon Glass depends on SPL_DM && BLK 16*c4d660d4SSimon Glass default y 17*c4d660d4SSimon Glass help 18*c4d660d4SSimon Glass Enable support for block devices, such as SCSI, MMC and USB 19*c4d660d4SSimon Glass flash sticks. These provide a block-level interface which permits 20*c4d660d4SSimon Glass reading, writing and (in some cases) erasing blocks. Block 21*c4d660d4SSimon Glass devices often have a partition table which allows the device to 22*c4d660d4SSimon Glass be partitioned into several areas, called 'partitions' in U-Boot. 23*c4d660d4SSimon Glass A filesystem can be placed in each partition. 24*c4d660d4SSimon Glass 25e40cf34aSEric Nelsonconfig BLOCK_CACHE 26e40cf34aSEric Nelson bool "Use block device cache" 27e40cf34aSEric Nelson default n 28e40cf34aSEric Nelson help 29e40cf34aSEric Nelson This option enables a disk-block cache for all block devices. 30e40cf34aSEric Nelson This is most useful when accessing filesystems under U-Boot since 31e40cf34aSEric Nelson it will prevent repeated reads from directory structures and other 32e40cf34aSEric Nelson filesystem data structures. 33e8a016b5SMichal Simek 34fc843a02SSimon Glassconfig IDE 35fc843a02SSimon Glass bool "Support IDE controllers" 36fc843a02SSimon Glass help 37fc843a02SSimon Glass Enables support for IDE (Integrated Drive Electronics) hard drives. 38fc843a02SSimon Glass This allows access to raw blocks and filesystems on an IDE drive 39fc843a02SSimon Glass from U-Boot. See also CMD_IDE which provides an 'ide' command for 40fc843a02SSimon Glass performing various IDE operations. 41