How to use jffs2 in flash ?

Altera_Forum · ‎06-03-2006

hi hippo

I can cp -a some dirs to /mnt on uclinux with using initramfs.

In other word, i have build rootfs in my flash(mtdblock0)that can mount it to /mnt dir, and i can see some dirs in /mnt dir.

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BusyBox v1.1.1-pre0 (2006.04.20-12:52+0000) Built-in shell (msh)

Enter 'help' for a list of built-in commands.

# mount -t jffs2 /dev/mtdblock0 /mnt# cd /mnt# ls -l# mkdir proc sys var tmp mnt# cp -a /init /etc /dev /bin /sbin /usr /root /home /opt .# ls -l

drwxr-xr-x 2 root root 0 Nov 29 17:00 bin

drwxr-xr-x 6 root root 0 Nov 29 17:00 dev

drwxr-xr-x 4 root root 0 Nov 29 17:00 etc

drwxr-xr-x 3 root root 0 Nov 29 17:00 home

lrwxrwxrwx 1 root root 10 Nov 29 17:03 init -> /sbin/init

drwxr-xr-x 2 root root 0 Nov 29 17:01 mnt

drwxr-xr-x 2 root root 0 Nov 29 17:00 opt

drwxr-xr-x 2 root root 0 Nov 29 17:01 proc

drwxr-xr-x 2 root root 0 Nov 29 17:00 root

drwxr-xr-x 2 root root 0 Nov 29 17:00 sbin

drwxr-xr-x 2 root root 0 Nov 29 17:01 sys

drwxr-xr-x 2 root root 0 Nov 29 17:01 tmp

drwxr-xr-x 5 root root 0 Nov 29 17:00 usr

drwxr-xr-x 2 root root 0 Nov 29 17:01 var# cd /# umount /mnt# ls

bin etc init mnt proc sbin tmp var

dev home lib opt root sys usr# [/b]

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Check rootfs in mnt dir.

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BusyBox v1.1.1-pre0 (2006.04.20-12:52+0000) Built-in shell (msh)

Enter 'help' for a list of built-in commands.

# mount -t jffs2 /dev/mtdblock0 /mnt# cd /mnt# ls -l

drwxr-xr-x 2 root root 0 Nov 29 17:00 bin

drwxr-xr-x 6 root root 0 Nov 29 17:00 dev

drwxr-xr-x 4 root root 0 Nov 29 17:00 etc

drwxr-xr-x 3 root root 0 Nov 29 17:00 home

lrwxrwxrwx 1 root root 10 Nov 29 17:03 init -> /sbin/init

drwxr-xr-x 2 root root 0 Nov 29 17:01 mnt

drwxr-xr-x 2 root root 0 Nov 29 17:00 opt

drwxr-xr-x 2 root root 0 Nov 29 17:01 proc

drwxr-xr-x 2 root root 0 Nov 29 17:00 root

drwxr-xr-x 2 root root 0 Nov 29 17:00 sbin

drwxr-xr-x 2 root root 0 Nov 29 17:01 sys

drwxr-xr-x 2 root root 0 Nov 29 17:01 tmp

drwxr-xr-x 5 root root 0 Nov 29 17:00 usr

drwxr-xr-x 2 root root 0 Nov 29 17:01 var# cd /# umount /mnt# [/b]

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Q1: How to do that next step ?

Q2: If i want to store some files in flash with using jffs2.

How to do it ?

Can I use "nios2-flash-programmer" command to store files to flash in sdk shell ? or i need to change specific format for programming flash.

Thx !

Altera_Forum · ‎06-03-2006

A1. You can try root jffs2 now with kernel command string.

A2. You need to use mkfs.jffs2. You may read Jdhar's EPCS guide.

Altera_Forum · ‎06-03-2006

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originally posted by hippo@Jun 3 2006, 08:14 AM

a1. you can try root jffs2 now with kernel command string.

a2. you need to use mkfs.jffs2. you may read jdhar's epcs guide.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15827)

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hi hippo

I meet the same problem again.

This is my processing setps as follows:

1. I don't use initramfs and add "root=/dev/mtdblock0 rw rootfs=jffs2" string in kernel command line.

2. Rebuild kernel to generate new zImage.

3. Download zImage in sdk shell

4. Use "nios2-terminal" command to input uclinux OS.

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uClinux/Nios II

Built 1 zonelists

Kernel command line: root=/dev/mtdblock0 rw rootfs=jffs2

PID hash table entries: 64 (order: 6, 1024 bytes)

Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)

Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)

Memory available: 6768k/8192k RAM, 0k/0k ROM (1185k kernel code, 144k data)

Mount-cache hash table entries: 512

SCSI subsystem initialized

usbcore: registered new driver usbfs

usbcore: registered new driver hub

io scheduler noop registered

io scheduler deadline registered (default)

Serial: JTAG UART driver $Revision: 1.4 $

ttyJ0 at MMIO 0x80481120 (irq = 1) is a jtag_uart

Altera NDK flash (AMD): Found 1 x16 devices at 0x0 in 8-bit bank

Amd/Fujitsu Extended Query Table at 0x0040

number of CFI chips: 1

cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.

cmdlinepart partition parsing not available

RedBoot partition parsing not available

Using Altera NDK partition definition

Creating 1 MTD partitions on "Altera NDK flash (AMD)":

0x00000000-0x00400000 : "jffs2"

usbmon: debugfs is not available

driver isp1362-hcd, 2005-04-04

isp1362-hcd isp1362-hcd: ISP1362 Host Controller

isp1362_hc_reset:

isp1362-hcd isp1362-hcd: new USB bus registered, assigned bus number 1

isp1362-hcd isp1362-hcd: irq 4, io mem 0x804810d0

isp1362_hc_start:

isp1362-hcd isp1362-hcd: ISP1362 Memory usage:

isp1362-hcd isp1362-hcd: ISTL: 2 * 256: 512 @ $0000:$0100

isp1362-hcd isp1362-hcd: INTL: 16 * ( 64+8): 1152 @ $0200

isp1362-hcd isp1362-hcd: ATL : 32 * ( 64+8): 2304 @ $0680

isp1362-hcd isp1362-hcd: USED/FREE: 3968 128

usb usb1: configuration# 1 chosen from 1 choice

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

ISP1362 Host Controller, irq 4

Initializing USB Mass Storage driver...

usbcore: registered new driver usb-storage

USB Mass Storage support registered.

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0)[/b]

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How to solve it ?

Thx !

Altera_Forum · ‎06-03-2006

Please enable mtd debug level 2 or 3 in kernel config.

Altera_Forum · ‎06-03-2006

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originally posted by hippo@Jun 3 2006, 09:26 AM

please enable mtd debug level 2 or 3 in kernel config.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15837)

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hi hippo

I already enable mtd degug level is 2 in kernel config.

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uClinux/Nios II

Built 1 zonelists

Kernel command line: root=/dev/mtdblock0 rw rootfs=jffs2

PID hash table entries: 64 (order: 6, 1024 bytes)

Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)

Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)

Memory available: 6768k/8192k RAM, 0k/0k ROM (1186k kernel code, 143k data)

Mount-cache hash table entries: 512

SCSI subsystem initialized

usbcore: registered new driver usbfs

usbcore: registered new driver hub

io scheduler noop registered

io scheduler deadline registered (default)

Serial: JTAG UART driver $Revision: 1.4 $

ttyJ0 at MMIO 0x80481120 (irq = 1) is a jtag_uart

Altera NDK flash (AMD): Found 1 x16 devices at 0x0 in 8-bit bank

Amd/Fujitsu Extended Query Table at 0x0040

number of CFI chips: 1

cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.

cmdlinepart partition parsing not available

RedBoot partition parsing not available

Using Altera NDK partition definition

Creating 1 MTD partitions on "Altera NDK flash (AMD)":

0x00000000-0x00400000 : "jffs2"

mtd: Giving out device 0 to jffs2

usbmon: debugfs is not available

driver isp1362-hcd, 2005-04-04

isp1362-hcd isp1362-hcd: ISP1362 Host Controller

isp1362_hc_reset:

isp1362-hcd isp1362-hcd: new USB bus registered, assigned bus number 1

isp1362-hcd isp1362-hcd: irq 4, io mem 0x804810d0

isp1362_hc_start:

isp1362-hcd isp1362-hcd: ISP1362 Memory usage:

isp1362-hcd isp1362-hcd: ISTL: 2 * 256: 512 @ $0000:$0100

isp1362-hcd isp1362-hcd: INTL: 16 * ( 64+8): 1152 @ $0200

isp1362-hcd isp1362-hcd: ATL : 32 * ( 64+8): 2304 @ $0680

isp1362-hcd isp1362-hcd: USED/FREE: 3968 128

usb usb1: configuration# 1 chosen from 1 choice

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

ISP1362 Host Controller, irq 4

Initializing USB Mass Storage driver...

usbcore: registered new driver usb-storage

USB Mass Storage support registered.

mtdblock_open

ok

mtdblock: read on "jffs2" at 0x0, size 0x200

mtdblock_release

ok

mtdblock_open

ok

mtdblock: read on "jffs2" at 0x0, size 0x200

mtdblock_release

ok

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0)[/b]

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Thx !

Altera_Forum · ‎06-03-2006

It tried to read mtd sector 00 twice. but failed to mount?

Please try mtd debug level 3.

And try to trace into kernel source init/main.c and do_mount .

Altera_Forum · ‎06-03-2006

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originally posted by hippo@Jun 3 2006, 10:02 AM

it tried to read mtd sector 00 twice. but failed to mount?

please try mtd debug level 3.

and try to trace into kernel source init/main.c and do_mount .

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15839)

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hi hippo

I have set mtd debug level is 3 that got the same result again. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif

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USB Mass Storage support registered.

mtdblock_open

ok

mtdblock: read on "jffs2" at 0x0, size 0x200

mtdblock_release

ok

mtdblock_open

ok

mtdblock: read on "jffs2" at 0x0, size 0x200

mtdblock_release

ok

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0)[/b]

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How to do that is croectlly ?

Thx !

Altera_Forum · ‎06-04-2006

I will trace this problem later when I have spare time.

For now, you can boot with initramfs, and put your user apps and data on jffs2 drive. You can copy them from usb disk to jffs2. Or try mkfs.jffs2.

Root on jffs2 will save only around 300 kB.

Altera_Forum · ‎06-04-2006

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originally posted by hippo@Jun 3 2006, 09:31 PM

i will trace this problem later when i have spare time.

for now, you can boot with initramfs, and put your user apps and data on jffs2 drive. you can copy them from usb disk to jffs2. or try mkfs.jffs2.

root on jffs2 will save only around 300 kb.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15851)

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hi hippo

Thank you very much !

I have not try to copy files from usb disk to jffs2 drive yet.

but i think that is OK.

Altera_Forum · ‎06-04-2006

hi hippo

I can copy files from usb compact flash to jffs2 drive(flash) in mnt dir, as following:

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BusyBox v1.1.1-pre0 (2006.04.20-12:52+0000) Built-in shell (msh)

Enter 'help' for a list of built-in commands.

# usb 1-2: new full speed USB device using isp1362-hcd and address 2

usb 1-2: configuration# 1 chosen from 1 choice

scsi0 : SCSI emulation for USB Mass Storage devices

Vendor: eUSB Model: Compact Flash Rev: 5.07

Type: Direct-Access ANSI SCSI revision: 02

SCSI device sda: 250880 512-byte hdwr sectors (128 MB)

sda: Write Protect is off

sda: assuming drive cache: write through

SCSI device sda: 250880 512-byte hdwr sectors (128 MB)

sda: Write Protect is off

sda: assuming drive cache: write through

sda: sda1

sd 0:0:0:0: Attached scsi removable disk sda

# cd /mnt# mkdir usb flash# ls

flash usb# cd /mnt# ls -l

drwxr-xr-x 2 root root 0 Nov 29 17:00 flash

drwxr-xr-x 2 root root 0 Nov 29 17:00 usb# mount -t vfat /dev/sda1 /mnt/usb# mount -t jffs2 /dev/mtdblock0 /mnt/flash# cd /mnt# cd /mnt/usb# ls

Baby.wav Baby1.wav readme.txt# cp readme.txt /mnt/flash# cd /mnt/flash# ls

bin home opt root tmp

dev init proc sbin usr

etc mnt readme.txt sys var# rm readme.txt# ls

bin etc init opt root sys usr

dev home mnt proc sbin tmp var# [/b]

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Altera_Forum · ‎06-04-2006

Good. You don't need the dirs for rootfs in jffs2 now. You can use jffs2 mount all for user data.

Altera_Forum · ‎06-04-2006

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originally posted by hippo@Jun 4 2006, 06:13 AM

good. you don't need the dirs for rootfs in jffs2 now. you can use jffs2 mount all for user data.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=15866)

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hi hippo

Thank u !

OK ...

I will erase all dirs and save user data in jffs2 dirve.

jay