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Diffstat (limited to 'recipes-core/initscripts/initscripts-1.0/README')
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diff --git a/recipes-core/initscripts/initscripts-1.0/README b/recipes-core/initscripts/initscripts-1.0/README new file mode 100644 index 0000000..d2b67e1 --- /dev/null +++ b/recipes-core/initscripts/initscripts-1.0/README @@ -0,0 +1,77 @@ +# Procedure for flashing MTRV1-0.4 + +cd /var/volatile +find . -type f | xargs rm +# Now copy the upgrade image to /var/volatile +mlinux-firmware-upgrade -f upgrade-image.bin + +# +# Requirements for upgrade-image.bin + +# All partition images (at91bootstrap, u-boot, +# uImage, and rootfs.jffs2) must have md5sums. +# rootfs.jffs2 should be padded with 1's to +# the next even multiple of dd blocks. +# In this example the dd "blocksz" is set to +# 131072 (128*1024). +# +# Find the size of the jffs2: +# ls -l +# total 50040 +# -rw-r--r-- 1 jklug jklug 51232792 Nov 1 11:30 rootfs.jffs2 +# In this case it is 51232792. This is then divided by +# 131072. This is 390.87 ... so we round up to 391. +# +# This means we must pad the file to 391*131072 or +# 51249152. +# +# We can use objcopy to enlarge the file: +# +# mkdir padded +# objcopy -I binary -O binary --pad-to 51249152 --gap-fill 0xff rootfs.jffs2 padded/rootfs.jffs2 +# +# This puts the padded version of the jffs2 file in the padded directory. +# Now we must calculate the md5sum of the new padded file: +# cd padded +# cat rootfs.jffs2 | md5sum >rootfs.jffs2.md5 +# +# Now we must replace the files in the archive with the +# padded file and its md5sum. +# +# We must also add a new file. do_flash_upgrade. It must +# be created like this: +# +# echo 131072 391 >do_flash_upgrade +# +# These two parameters are used by dd to read the correct +# size of the flash. The first parameter is the block size, +# and the second parameter is the number of blocks of the +# padded file. +# +# The result tar file is not compressed: +# +# tar -cf ~/rcell-padded-5.3.6.bin bstrap* do* model mpo* root* ub* uI* +# +# and the contents of the tar file are these: +# +# tar -tvf rcell-padded-5.3.6.bin +# -rw-rw-r-- jklug/jklug 10360 2021-11-01 11:30 bstrap.bin +# -rw-rw-r-- jklug/jklug 36 2021-11-01 11:30 bstrap.bin.md5 +# -rw-rw-r-- jklug/jklug 11 2021-11-17 12:35 do_flash_upgrade +# -rw-rw-r-- jklug/jklug 6 2021-11-01 11:30 model +# -rw-rw-r-- jklug/jklug 6 2021-11-01 11:30 mpower_version +# -rw-rw-r-- jklug/jklug 51249152 2021-11-17 06:23 rootfs.jffs2 +# -rw-rw-r-- jklug/jklug 36 2021-11-17 06:36 rootfs.jffs2.md5 +# -rwxr-xr-x jklug/jklug 473720 2021-11-01 11:30 uboot.bin +# -rw-rw-r-- jklug/jklug 36 2021-11-01 11:30 uboot.bin.md5 +# -rw-r--r-- jklug/jklug 3435940 2021-11-01 11:30 uImage.bin +# -rw-rw-r-- jklug/jklug 36 2021-11-01 11:30 uImage.bin.md5 +# +# The changes are as follows: +# do_flash_upgrade -- new file +# rootfs.jffs2 -- padded with 0xff at the end of the file +# rootfs.jffs2.md5 -- new md5 sum to reflect the added padding + + + + |