config BLK
bool "Support block devices"
depends on DM
+ default y if DM_MMC || DM_USB
help
Enable support for block devices, such as SCSI, MMC and USB
flash sticks. These provide a block-level interface which permits
be partitioned into several areas, called 'partitions' in U-Boot.
A filesystem can be placed in each partition.
-config DISK
- bool "Support disk controllers with driver model"
- depends on DM
- default y if DM
+config HAVE_BLOCK_DEVICE
+ bool "Enable Legacy Block Device"
+ help
+ Some devices require block support whether or not DM is enabled
+
+config SPL_BLK
+ bool "Support block devices in SPL"
+ depends on SPL_DM && BLK
+ default y
+ help
+ Enable support for block devices, such as SCSI, MMC and USB
+ flash sticks. These provide a block-level interface which permits
+ reading, writing and (in some cases) erasing blocks. Block
+ devices often have a partition table which allows the device to
+ be partitioned into several areas, called 'partitions' in U-Boot.
+ A filesystem can be placed in each partition.
+
+config TPL_BLK
+ bool "Support block devices in TPL"
+ depends on TPL_DM && BLK
+ default y
+ help
+ Enable support for block devices, such as SCSI, MMC and USB
+ flash sticks. These provide a block-level interface which permits
+ reading, writing and (in some cases) erasing blocks. Block
+ devices often have a partition table which allows the device to
+ be partitioned into several areas, called 'partitions' in U-Boot.
+ A filesystem can be placed in each partition.
+
+config BLOCK_CACHE
+ bool "Use block device cache"
+ depends on BLK
+ default y
+ help
+ This option enables a disk-block cache for all block devices.
+ This is most useful when accessing filesystems under U-Boot since
+ it will prevent repeated reads from directory structures and other
+ filesystem data structures.
+
+config SPL_BLOCK_CACHE
+ bool "Use block device cache in SPL"
+ depends on SPL_BLK
+ default n
+ help
+ This option enables the disk-block cache in SPL
+
+config TPL_BLOCK_CACHE
+ bool "Use block device cache in TPL"
+ depends on TPL_BLK
+ default n
+ help
+ This option enables the disk-block cache in TPL
+
+config IDE
+ bool "Support IDE controllers"
+ select HAVE_BLOCK_DEVICE
help
- This enables a uclass for disk controllers in U-Boot. Various driver
- types can use this, such as AHCI/SATA. It does not provide any standard
- operations at present. The block device interface has not been converted
- to driver model.
+ Enables support for IDE (Integrated Drive Electronics) hard drives.
+ This allows access to raw blocks and filesystems on an IDE drive
+ from U-Boot. See also CMD_IDE which provides an 'ide' command for
+ performing various IDE operations.