Re: 1 flash programming question :)

Altera_Forum · ‎06-15-2005

i use altera cyclone board,the flash's capacity is 8M¡£my uclinux kernel is about 2099k, filesystem is about 1987k.

while i download the kernel, filesystem is covered.

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

download the filesystem,kernel is covered.

sometimes the safe configuration is covered too(red led is on).

the flash still worked well,but yesterday the problem happened.

please tell me how to solve it,thank u!!!!

Altera_Forum · ‎06-16-2005

the information:

uClinux/Nios II

setup_arch: No persistant network settings signature at 007F0000

Built 1 zonelists

Kernel command line: root=/dev/mtdblock0 ro

PID hash table entries: 128 (order: 7, 2048 bytes)

Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)

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

Memory available: 14384k/16384k RAM, 0k/0k ROM (1480k kernel code, 327k data)

Mount-cache hash table entries: 512 (order: 0, 4096 bytes)

NET: Registered protocol family 16

NIOS serial driver version 0.0

ttyS0 (irq = 4) is a builtin NIOS UART

Serial: JTAG UART driver $Revision: 1.3 $

ttyJ0 at MMIO 0x80920820 (irq = 1) is a jtag_uart

RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize

smc_probe: 50000 Khz Nios

SMSC LAN91C111 Driver (v2.1), (Linux Kernel 2.6)

eth0: SMC91C11xFD(rev:1) at 0x80910300 IRQ:6 MEMSIZE:8192b NOWAIT:0 ADDR: 00:07:

ed:00:00:00

smc_probe: 50000 Khz Nios

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2

ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx

CF: ctl=1

hda: Hitachi CV 7.1.1, CFA DISK drive

Using anticipatory io scheduler

ide0 at 0x80900800-0x80900807,0x80900838 on irq 8

hda: max request size: 128KiB

hda: 31488 sectors (16 MB) w/1KiB Cache, CHS=246/4/32

hda:<6>check_part[0]=17230780: hda1

res=1:<4>CFI: Found no Microtronix map device at location zero

JEDEC: Found no Microtronix map device at location zero

NET: Registered protocol family 2

IP: routing cache hash table of 512 buckets, 4Kbytes

TCP: Hash tables configured (established 1024 bind 2048)

NET: Registered protocol family 1

NET: Registered protocol family 17

VFS: Cannot open root device "mtdblock0" or unknown-block(0,0)

Please append a correct "root=" boot option

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

---------then stop,7-seg led is 88.

Altera_Forum · ‎06-16-2005

If you can remove something you don't really need in kernel, and make the kernel smaller than 2M, that will be the best. If you can not reduce the size of kernel to less than 2M, I would recommend u-boot, which allows you to compress the kernel to less than 1M.

Altera_Forum · ‎06-16-2005

it's ok ! thank wentao very much!!!