Hi All, We at Samsung have implemented ext4 file system support in uboot. Please review the subsequent patches.
Thanks & Regards, Uma Shankar Manjunatha C Achar
From: Uma Shankar uma.shankar@samsung.com Date: Mon, 12 Dec 2011 12:01:23 +0530 Subject: [PATCH 0/2] *** Add ext4 filesystem support in uboot ***
*** This patch series adds support for ext4 ls,load and write features in uboot Journaling is supported for write feature.
To Enable EXT4 commands, modify the board specific config file with #define CONFIG_CMD_EXT2 1 #define CONFIG_CMD_EXT4 1 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
***
Uma Shankar (2): ext4fs ls load support ext4fs write support
Makefile | 2 +- common/Makefile | 1 + common/cmd_ext4.c | 388 ++++++++++ fs/Makefile | 1 + fs/ext2/ext2fs.c | 303 +-------- fs/ext4/Makefile | 51 ++ fs/ext4/crc16.c | 61 ++ fs/ext4/crc16.h | 17 + fs/ext4/ext4_common.c | 1954 ++++++++++++++++++++++++++++++++++++++++++++++++ fs/ext4/ext4_common.h | 61 ++ fs/ext4/ext4_journal.c | 657 ++++++++++++++++ fs/ext4/ext4_journal.h | 147 ++++ fs/ext4/ext4fs.c | 1252 +++++++++++++++++++++++++++++++ include/ext2fs.h | 177 +++++- include/ext4fs.h | 172 +++++ 15 files changed, 4937 insertions(+), 307 deletions(-) create mode 100644 common/cmd_ext4.c create mode 100644 fs/ext4/Makefile create mode 100644 fs/ext4/crc16.c create mode 100644 fs/ext4/crc16.h create mode 100644 fs/ext4/ext4_common.c create mode 100644 fs/ext4/ext4_common.h create mode 100644 fs/ext4/ext4_journal.c create mode 100644 fs/ext4/ext4_journal.h create mode 100644 fs/ext4/ext4fs.c create mode 100644 include/ext4fs.h