-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
+U-Boot supports access of both ext2 and ext4 filesystems, either in read-only
+mode or in read-write mode.
+
+First, to enable support for both ext4 (and, automatically, ext2 as well),
+but without selecting the corresponding commands, enable one of the following:
+
+ CONFIG_FS_EXT4 (for read-only)
+ CONFIG_EXT4_WRITE (for read-write)
+
+Next, to select the ext2-related commands:
+
+ * ext2ls
+ * ext2load
+
+or ext4-related commands:
+
+ * ext4size
+ * ext4ls
+ * ext4load
+
+use one or both of:
+
+ CONFIG_CMD_EXT2
+ CONFIG_CMD_EXT4
+
+Selecting either of the above automatically selects CONFIG_FS_EXT4 if it
+wasn't enabled already.
+
+In addition, to get the write access command "ext4write", enable:
+
+ CONFIG_CMD_EXT4_WRITE
+
+which automatically selects CONFIG_EXT4_WRITE if it wasn't defined
+already.
+
+Also relevant are the generic filesystem commands, selected by:
+
+ CONFIG_CMD_FS_GENERIC
+
+This does not automatically enable EXT4 support for you, you still need
+to do that yourself.
+
+Some sample commands to test ext4 support:
+
+1. Check that the commands can be seen in the output of U-Boot help:
+
+ UBOOT #help
+ ...
+ ext4load- load binary file from a Ext4 file system
+ ext4ls - list files in a directory (default /)
+ ext4size - determine a file's size
+ ext4write- create a file in ext4 formatted partition
+ ...
+
+2. To list the files in an ext4-formatted partition, run:
+
+ 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, run:
+
+ ext4load <interface> <dev[:part]> [addr] [filename] [bytes]
+
+ For example:
+ UBOOT #ext4load mmc 2:2 0x30007fc0 uImage
+
+4. To write a file to an 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
projects / oweals / u-boot.git / blobdiff