about cfi-flash for DE2 board....

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originally posted by hippo@Jun 2 2006, 06:09 AM

the key point is that you need a full rootfs on you jffs2 drive.

one way to do it is using mkfs.jffs2 on your linux host. but we use another approach here, we copy them from initramfs.

when you use initramfs, you should not have root=/dev/mtdblock0 in the kernel command string. try "cat /proc/mounts" .

when you use jffs2 for root, you should not use initramfs.

you don't need the "init=/init" in kernel command string.

just "root=/dev/mtdblock0 rw rootfs=jffs2" should be enough.

now check again if you have the proper rootfs in the jffs2 drive.

boot with initramfs,

mount the jffs2 drive, and "ls -l" to get its content.

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hi hippo

Thank u !

When i mount mtdblock0 to /mnt dir that can see some dir in there.

1. I use initramfs and no kernel command string

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

drwxr-xr-x 2 500 500 0 Nov 29 17:00 bin

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

drwxr-xr-x 4 500 500 0 Nov 29 17:00 etc

drwxr-xr-x 3 500 500 0 Nov 29 17:00 home

lrwxrwxrwx 1 root root 10 Nov 29 17:02 init -> /sbin/init

drwxr-xr-x 2 500 500 0 Nov 29 17:00 lib

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

drwxr-xr-x 2 500 500 0 Nov 29 17:00 opt

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

drwxr-xr-x 2 500 500 0 Nov 29 17:00 root

drwxr-xr-x 2 500 500 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 2 root root 0 Nov 29 17:01 var# cd /# umount /mnt# [/b]

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2. I don&#39;t use initramfs and have "root=/dev/mtdblock0 rw rootfs=jffs2" kernel command string

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uClinux/Nios II

Altera Nios II support © 2004 Microtronix Datacom Ltd.

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

JFFS2 version 2.2. (NAND) © 2001-2003 Red Hat, Inc.

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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finally , I can&#39;t boot the kernel ....... http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif

Why ?

Thx !