config BLK
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bool "Support block devices"
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depends on DM
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default y if DM_MMC
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help
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Enable support for block devices, such as SCSI, MMC and USB
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flash sticks. These provide a block-level interface which permits
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reading, writing and (in some cases) erasing blocks. Block
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devices often have a partition table which allows the device to
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be partitioned into several areas, called 'partitions' in U-Boot.
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A filesystem can be placed in each partition.
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config SPL_BLK
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bool "Support block devices in SPL"
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depends on SPL_DM && BLK
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default y
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help
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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.
|
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config SPL_BLK_READ_PREPARE
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bool "Support block devices prepare to read data in SPL"
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depends on SPL_BLK
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help
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Enable support for block devices to prefetch data. MMC and mtd_blk
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devices can be attached to block devices. It is applied to prefetch
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data in the background and the device run some other process in the
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same time.
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config BLOCK_CACHE
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bool "Use block device cache"
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default n
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help
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This option enables a disk-block cache for all block devices.
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This is most useful when accessing filesystems under U-Boot since
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it will prevent repeated reads from directory structures and other
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filesystem data structures.
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config IDE
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bool "Support IDE controllers"
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help
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Enables support for IDE (Integrated Drive Electronics) hard drives.
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This allows access to raw blocks and filesystems on an IDE drive
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from U-Boot. See also CMD_IDE which provides an 'ide' command for
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performing various IDE operations.
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