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- This patch series adds support for ext4 ls,load and write features in uboot
- Journaling is supported for write feature.
- To Enable ext2 ls and load commands, modify the board specific config file with
- #define CONFIG_CMD_EXT2
- To Enable ext4 ls and load commands, modify the board specific config file with
- #define CONFIG_CMD_EXT4
- To enable ext4 write command, modify the board specific config file with
- #define CONFIG_CMD_EXT4
- #define CONFIG_CMD_EXT4_WRITE
- Steps to test:
- 1. After applying the patch, ext4 specific commands can be seen
- in the boot loader prompt using
- UBOOT #help
- ext4load- load binary file from a Ext4 file system
- ext4ls - list files in a directory (default /)
- ext4write- create a file in ext4 formatted partition
- 2. To list the files in ext4 formatted partition, execute
- ext4ls <interface> <dev[:part]> [directory]
- For example:
- UBOOT #ext4ls mmc 0:5 /usr/lib
- 3. To read and load a file from an ext4 formatted partition to RAM, execute
- ext4load <interface> <dev[:part]> [addr] [filename] [bytes]
- For example:
- UBOOT #ext4load mmc 2:2 0x30007fc0 uImage
- 4. To write a file to a ext4 formatted partition.
- a) First load a file to RAM at a particular address for example 0x30007fc0.
- Now execute ext4write command
- ext4write <interface> <dev[:part]> [filename] [Address] [sizebytes]
- For example:
- UBOOT #ext4write mmc 2:2 /boot/uImage 0x30007fc0 6183120
- (here 6183120 is the size of the file to be written)
- Note: Absolute path is required for the file to be written
- References :
- -- ext4 implementation in Linux Kernel
- -- Uboot existing ext2 load and ls implementation
- -- Journaling block device JBD2 implementation in linux Kernel
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