PROCESSOR-SDK-AM65X: 32MB UBIFS for QSPI flash

Ram murthy Mamidi

Part Number: PROCESSOR-SDK-AM65X
Other Parts Discussed in Thread: AM6548

Hi Team!

we have developed custom HW based on AM6548 series processor with 32MB QSPI flash. we are able to boot the HW till Bootloader and TFTP also working ....we are able to donwload the images from TFTP server.

now my issue is not able to create less size UBIFS to load into 32MB QSPI flash....

can anyone suggest from scratch how to create UBIFS with less size by using TI SDK for AM6548 series processor..

Thanks & Regards

Ram Murthy

over 5 years ago

0 RonB over 5 years ago

TI__Mastermind 30506 points

Hello,

We will need a day or so to investigate this and get back to you with some feedback. Thank you.

0 Ram murthy Mamidi over 5 years ago in reply to RonB

Prodigy 75 points

Hi !

Thank you for your quick reply , sure we will wait for 1 more day to get the feedback on my query ...

Thanks & Regards

Garimella Srinivasu

0 Florin Gherghinis over 5 years ago in reply to RonB

Intellectual 430 points

Just wanted to tag our rep in here Barend Ungrod barend@ti.com

0 Andreas Dannenberg over 5 years ago in reply to Florin Gherghinis

TI__Guru 69602 points

Attached some steps that shows how to create a small 20MB-sized UBI image (including Kernel and DTB) from artifacts included in the SDK, please see below. It includes showing the use of the "strip" command to reduce library sizes. I also added some comments to the different steps to make it a bit easier to follow.

a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem
$ tar -C arago-tiny-image-am65xx-evm -xvf arago-tiny-image-am65xx-evm.tar.xz

# Baseline size
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/arago-tiny-image-am65xx-evm
$ du -h -d1
680K    ./etc
7.2M    ./sbin
4.0K    ./run
4.0K    ./tmp
8.0K    ./home
4.0K    ./boot
4.0K    ./proc
4.0K    ./dev
1.3M    ./var
8.9M    ./usr
8.0K    ./mnt
30M     ./lib
4.0K    ./media
4.0K    ./sys
1.1M    ./bin
49M     .

# Strip all libraries
$ ../../linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-linux-gnu-strip -v lib/*

# Re-asses size
$ du -h -d1
680K    ./etc
7.2M    ./sbin
4.0K    ./run
4.0K    ./tmp
8.0K    ./home
4.0K    ./boot
4.0K    ./proc
4.0K    ./dev
1.3M    ./var
8.9M    ./usr
8.0K    ./mnt
5.2M    ./lib
4.0K    ./media
4.0K    ./sys
1.1M    ./bin
25M  

# Remove more stuff
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/arago-tiny-image-am65xx-evm
$ rm -v sbin/fsck*
removed 'sbin/fsck'
removed 'sbin/fsck.ext2'
removed 'sbin/fsck.ext3'
removed 'sbin/fsck.ext4'
removed 'sbin/fsck.minix'
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/arago-tiny-image-am65xx-evm
$ rm -v sbin/mk*fs*
removed 'sbin/mkdosfs'
removed 'sbin/mke2fs'
removed 'sbin/mke2fs.e2fsprogs'
removed 'sbin/mkfs.ext2'
removed 'sbin/mkfs.ext2.e2fsprogs'
removed 'sbin/mkfs.ext3'
removed 'sbin/mkfs.ext4'
removed 'sbin/mkfs.minix'
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/arago-tiny-image-am65xx-evm
$ rm -v sbin/ldconfig 
removed 'sbin/ldconfig'

# Re-asses size
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/arago-tiny-image-am65xx-evm
$ du -h -d1
680K    ./etc
1.5M    ./sbin
4.0K    ./run
4.0K    ./tmp
8.0K    ./home
4.0K    ./boot
4.0K    ./proc
4.0K    ./dev
1.3M    ./var
8.9M    ./usr
8.0K    ./mnt
5.2M    ./lib
4.0K    ./media
4.0K    ./sys
1.1M    ./bin
19M     .

# Populate Kernel and DTBs into rootfs
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08
$ cp -v targetNFS/boot/Image filesystem/arago-tiny-image-am65xx-evm/boot/
'targetNFS/boot/Image' -> 'filesystem/arago-tiny-image-am65xx-evm/boot/Image'
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08
$ cp -v targetNFS/boot/k3-am654-base-board.dtb filesystem/arago-tiny-image-am65xx-evm/boot/
'targetNFS/boot/k3-am654-base-board.dtb' -> 'filesystem/arago-tiny-image-am65xx-evm/boot/k3-am654-base-board.dtb'
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08
$ cp -v targetNFS/boot/k3-am654-gp.dtbo filesystem/arago-tiny-image-am65xx-evm/boot/
'targetNFS/boot/k3-am654-gp.dtbo' -> 'filesystem/arago-tiny-image-am65xx-evm/boot/k3-am654-gp.dtbo'

# Re-asses size
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08
$ du -h -d1 filesystem/arago-tiny-image-am65xx-evm/
680K    filesystem/arago-tiny-image-am65xx-evm/etc
1.5M    filesystem/arago-tiny-image-am65xx-evm/sbin
4.0K    filesystem/arago-tiny-image-am65xx-evm/run
4.0K    filesystem/arago-tiny-image-am65xx-evm/tmp
8.0K    filesystem/arago-tiny-image-am65xx-evm/home
13M     filesystem/arago-tiny-image-am65xx-evm/boot
4.0K    filesystem/arago-tiny-image-am65xx-evm/proc
4.0K    filesystem/arago-tiny-image-am65xx-evm/dev
1.3M    filesystem/arago-tiny-image-am65xx-evm/var
8.9M    filesystem/arago-tiny-image-am65xx-evm/usr
8.0K    filesystem/arago-tiny-image-am65xx-evm/mnt
5.2M    filesystem/arago-tiny-image-am65xx-evm/lib
4.0K    filesystem/arago-tiny-image-am65xx-evm/media
4.0K    filesystem/arago-tiny-image-am65xx-evm/sys
1.1M    filesystem/arago-tiny-image-am65xx-evm/bin
32M     filesystem/arago-tiny-image-am65xx-evm/

# Turn rootfs into an UBI image
# Also see e2e.ti.com/.../3138731 for
# updates that 'create-ubifs.sh' might need
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08
$ sudo bin/create-ubifs.sh filesystem/arago-tiny-image-am65xx-evm -v rootfs

Parameters:
    image_rootfs_dir ..... "filesystem/arago-tiny-image-am65xx-evm"
    image_name_prefix .... "/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/custom-am65xx-evm-rootfs"
    vol_name ............. "rootfs"

mkfs.ubifs
        root:         filesystem/arago-tiny-image-am65xx-evm/
        min_io_size:  8
        leb_size:     130944
        max_leb_cnt:  448
        output:       /opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/custom-am65xx-evm-rootfs.ubifs
        jrn_size:     7201920
        reserved:     0
        compr:        lzo
        keyhash:      r5
        fanout:       8
        orph_lebs:    1
        space_fixup:  0
        super lebs:   1
        master lebs:  2
        log_lebs:     4
        lpt_lebs:     2
        orph_lebs:    1
        main_lebs:    137
        gc lebs:      1
        index lebs:   3
        leb_cnt:      147
        UUID:         21E81922-47E1-4A06-8527-3DDECC1B5F1D
Success!
ubinize: LEB size:                  130944
ubinize: PEB size:                  131072
ubinize: min. I/O size:             1
ubinize: sub-page size:             1
ubinize: VID offset:                64
ubinize: data offset:               128
ubinize: UBI image sequence number: 517584410
ubinize: loaded the ini-file "/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/custom-am65xx-evm-rootfs.ubinize.cfg"
ubinize: count of sections: 1

ubinize: parsing section "ubifs"
ubinize: mode=ubi, keep parsing
ubinize: volume type: dynamic
ubinize: volume ID: 0
ubinize: volume size was not specified in section "ubifs", assume minimum to fit image "/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/custom-am65xx-evm-rootfs.ubifs"19248768 bytes (18.3 MiB)
ubinize: volume name: rootfs
ubinize: volume alignment: 1
ubinize: autoresize flags found
ubinize: adding volume 0
ubinize: writing volume 0
ubinize: image file: /opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/custom-am65xx-evm-rootfs.ubifs

ubinize: writing layout volume
ubinize: done

Success! The UBI image is available at "/opt/procsdk-linux-am65xx-evm-06.01.00.08/filesystem/custom-am65xx-evm-rootfs.ubi"

# Check final UBI size
a0797059@jiji:/opt/procsdk-linux-am65xx-evm-06.01.00.08
$ ll filesystem/*.ubi
-rw-r--r-- 1 root root 19529728 Feb 13 17:46 filesystem/custom-am65xx-evm-rootfs.ubi

Regards, Andreas

0 Barend Ungrodt over 5 years ago in reply to Andreas Dannenberg

TI__Intellectual 1420 points

Thanks Andreas! I also wanted to echo the recommendation you made to increase the size of the QSPI flash - while we are able to fit this UBIFS, it doesn't leave much room for any other application this customer may need to implement in the future. Florin Gherghinis @Garimella

0 Florin Gherghinis over 5 years ago in reply to Andreas Dannenberg

Intellectual 430 points

Thank you for all your efforts Andreas!

0 Andreas Dannenberg over 5 years ago in reply to Florin Gherghinis

TI__Guru 69602 points

Thanks everybody for closing the loop here. Also just to state the obvious, I was just trimming the filesystem to make it smaller. What you can actually trim (and what to add) will ultimately be dependent on the application/system. Just the fact we made a minimal image fit doesn't mean it'll be able to do something meaningful. So as said earlier I think 32MB are on the small side for an AM654-based system running Linux. You also want to consider about things like field-firmware updates and so on (dual image?).

Closing this thread now. Please open another one if anything else is needed on this front.

Regards, Andreas

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PROCESSOR-SDK-AM65X: 32MB UBIFS for QSPI flash