summaryrefslogtreecommitdiff
path: root/doc
diff options
context:
space:
mode:
authorTom Rini <trini@ti.com>2012-09-20 11:27:35 -0700
committerTom Rini <trini@ti.com>2012-09-20 11:27:35 -0700
commit5fb29f3c48d26981b117b08286bc16ec99d4ca0b (patch)
treeb4a4c5b5cc88fedc568bcb49e248e9561a884ef4 /doc
parent30a3f3881e44187f21eb08bf8601ed4adaf4ca0e (diff)
parent55b523b7d4ab885142f77d388007eb5490ba6bf4 (diff)
downloadu-boot-imx-5fb29f3c48d26981b117b08286bc16ec99d4ca0b.zip
u-boot-imx-5fb29f3c48d26981b117b08286bc16ec99d4ca0b.tar.gz
u-boot-imx-5fb29f3c48d26981b117b08286bc16ec99d4ca0b.tar.bz2
Merge branch 'ext4'
Update Makefile change for LIBS -> LIBS-y change. Conflicts: Makefile Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'doc')
-rw-r--r--doc/README.ext446
1 files changed, 46 insertions, 0 deletions
diff --git a/doc/README.ext4 b/doc/README.ext4
new file mode 100644
index 0000000..b3ea8b7
--- /dev/null
+++ b/doc/README.ext4
@@ -0,0 +1,46 @@
+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