This patch series adds support for ext4 ls,load and write features in uboot
Journaling is supported for write feature.
+To enable support for the ext4 (and ext2) filesystem implementation,
+#define CONFIG_FS_EXT4
+
+If you want write support,
+#define CONFIG_EXT4_WRITE
+
To Enable ext2 ls and load commands, modify the board specific config file with
#define CONFIG_CMD_EXT2
+This automatically defines CONFIG_FS_EXT4 for you.
To Enable ext4 ls and load commands, modify the board specific config file with
#define CONFIG_CMD_EXT4
+This automatically defines CONFIG_FS_EXT4 for you.
To enable ext4 write command, modify the board specific config file with
#define CONFIG_CMD_EXT4
#define CONFIG_CMD_EXT4_WRITE
+These automatically define CONFIG_FS_EXT4 and CONFIG_EXT4_WRITE for you.
+
+Also relevant are the generic filesystem commands,
+#define CONFIG_CMD_FS_GENERIC
+This does not automatically enable EXT4 support for you.
Steps to test:
1. After applying the patch, ext4 specific commands can be seen
in the boot loader prompt using
- UBOOT #help
+ 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
+ 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
+ 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
+ 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
+ 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