mirror of
https://github.com/AsahiLinux/u-boot
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d8063dc373
Add a block driver which handles read/write for EFI block devices. This
driver actually already exists ('efi_block') but is not really suitable
for use as a real U-Boot driver:
- The operations do not provide a udevice
- The code is designed for running as part of EFI loader, so uses
EFI_PRINT() and EFI_CALL().
- The bind method probes the device, which is not permitted
- It uses 'EFI' as its parent device
The new driver is more 'normal', just requiring its platform data be set
up in advance.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
104 lines
3.3 KiB
Text
104 lines
3.3 KiB
Text
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 || DM_USB
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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 HAVE_BLOCK_DEVICE
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bool "Enable Legacy Block Device"
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help
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Some devices require block support whether or not DM is enabled
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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
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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 TPL_BLK
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bool "Support block devices in TPL"
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depends on TPL_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
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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 BLOCK_CACHE
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bool "Use block device cache"
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depends on BLK
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default y
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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 SPL_BLOCK_CACHE
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bool "Use block device cache in SPL"
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depends on SPL_BLK
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help
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This option enables the disk-block cache in SPL
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config TPL_BLOCK_CACHE
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bool "Use block device cache in TPL"
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depends on TPL_BLK
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help
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This option enables the disk-block cache in TPL
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config EFI_MEDIA
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bool "Support EFI media drivers"
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default y if EFI || SANDBOX
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help
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Enable this to support media devices on top of UEFI. This enables
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just the uclass so you also need a specific driver to make this do
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anything.
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For sandbox there is a test driver.
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if EFI_MEDIA
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config EFI_MEDIA_SANDBOX
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bool "Sandbox EFI media driver"
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depends on SANDBOX
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default y
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help
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Enables a simple sandbox media driver, used for testing just the
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EFI_MEDIA uclass. It does not do anything useful, since sandbox does
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not actually support running on top of UEFI.
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config EFI_MEDIA_BLK
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bool "EFI media block driver"
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depends on EFI_APP
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default y
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help
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Enables a block driver for providing access to UEFI devices. This
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allows use of block devices detected by the underlying UEFI
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implementation. With this it is possible to use filesystems on these
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devices, for example.
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endif # EFI_MEDIA
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config IDE
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bool "Support IDE controllers"
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select HAVE_BLOCK_DEVICE
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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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