be partitioned into several areas, called 'partitions' in U-Boot.
A filesystem can be placed in each partition.
-config AHCI
- bool "Support SATA controllers with driver model"
- depends on DM
+config HAVE_BLOCK_DEVICE
+ bool "Enable Legacy 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.
+ Some devices require block support whether or not DM is enabled
-config DM_SCSI
- bool "Support SCSI controllers with driver model"
- depends on BLK
+config SPL_BLK
+ bool "Support block devices in SPL"
+ depends on SPL_DM && BLK
+ default y
help
- This option enables the SCSI (Small Computer System Interface) uclass
- which supports SCSI and SATA HDDs. For every device configuration
- (IDs/LUNs) a block device is created with RAW read/write and
- filesystem support.
+ 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"
- default n
+ 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.
-menu "SATA/SCSI device support"
+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
-endmenu
+config IDE
+ bool "Support IDE controllers"
+ select HAVE_BLOCK_DEVICE
+ help
+ 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.