| Uma Shankar | a74a99a | 2012-05-25 21:22:49 +0530 | [diff] [blame] | 1 | This patch series adds support for ext4 ls,load and write features in uboot |
| 2 | Journaling is supported for write feature. |
| 3 | |
| Stephen Warren | 4f8662d | 2012-10-22 06:43:50 +0000 | [diff] [blame] | 4 | To enable support for the ext4 (and ext2) filesystem implementation, |
| 5 | #define CONFIG_FS_EXT4 |
| 6 | |
| 7 | If you want write support, |
| 8 | #define CONFIG_EXT4_WRITE |
| 9 | |
| Uma Shankar | a74a99a | 2012-05-25 21:22:49 +0530 | [diff] [blame] | 10 | To Enable ext2 ls and load commands, modify the board specific config file with |
| 11 | #define CONFIG_CMD_EXT2 |
| Stephen Warren | 4f8662d | 2012-10-22 06:43:50 +0000 | [diff] [blame] | 12 | This automatically defines CONFIG_FS_EXT4 for you. |
| Uma Shankar | a74a99a | 2012-05-25 21:22:49 +0530 | [diff] [blame] | 13 | |
| 14 | To Enable ext4 ls and load commands, modify the board specific config file with |
| 15 | #define CONFIG_CMD_EXT4 |
| Stephen Warren | 4f8662d | 2012-10-22 06:43:50 +0000 | [diff] [blame] | 16 | This automatically defines CONFIG_FS_EXT4 for you. |
| Uma Shankar | a74a99a | 2012-05-25 21:22:49 +0530 | [diff] [blame] | 17 | |
| 18 | To enable ext4 write command, modify the board specific config file with |
| 19 | #define CONFIG_CMD_EXT4 |
| 20 | #define CONFIG_CMD_EXT4_WRITE |
| Stephen Warren | 4f8662d | 2012-10-22 06:43:50 +0000 | [diff] [blame] | 21 | These automatically define CONFIG_FS_EXT4 and CONFIG_EXT4_WRITE for you. |
| 22 | |
| 23 | Also relevant are the generic filesystem commands, |
| 24 | #define CONFIG_CMD_FS_GENERIC |
| 25 | This does not automatically enable EXT4 support for you. |
| Uma Shankar | a74a99a | 2012-05-25 21:22:49 +0530 | [diff] [blame] | 26 | |
| 27 | Steps to test: |
| 28 | |
| 29 | 1. After applying the patch, ext4 specific commands can be seen |
| 30 | in the boot loader prompt using |
| 31 | UBOOT #help |
| 32 | |
| 33 | ext4load- load binary file from a Ext4 file system |
| 34 | ext4ls - list files in a directory (default /) |
| 35 | ext4write- create a file in ext4 formatted partition |
| 36 | |
| 37 | 2. To list the files in ext4 formatted partition, execute |
| 38 | ext4ls <interface> <dev[:part]> [directory] |
| 39 | For example: |
| 40 | UBOOT #ext4ls mmc 0:5 /usr/lib |
| 41 | |
| 42 | 3. To read and load a file from an ext4 formatted partition to RAM, execute |
| 43 | ext4load <interface> <dev[:part]> [addr] [filename] [bytes] |
| 44 | For example: |
| 45 | UBOOT #ext4load mmc 2:2 0x30007fc0 uImage |
| 46 | |
| 47 | 4. To write a file to a ext4 formatted partition. |
| 48 | a) First load a file to RAM at a particular address for example 0x30007fc0. |
| 49 | Now execute ext4write command |
| 50 | ext4write <interface> <dev[:part]> [filename] [Address] [sizebytes] |
| 51 | For example: |
| 52 | UBOOT #ext4write mmc 2:2 /boot/uImage 0x30007fc0 6183120 |
| 53 | (here 6183120 is the size of the file to be written) |
| 54 | Note: Absolute path is required for the file to be written |
| 55 | |
| 56 | References : |
| 57 | -- ext4 implementation in Linux Kernel |
| 58 | -- Uboot existing ext2 load and ls implementation |
| 59 | -- Journaling block device JBD2 implementation in linux Kernel |